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/target/
Cargo.lock
**/*.rs.bk
# Vim temporary files
*.swp
*.swo
*__pycache__*
test/res/*

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# This file is part of masscanned.
# Copyright 2021 - The IVRE project
#
# Masscanned is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Masscanned is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
# License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
[package]
name = "masscanned"
version = "0.2.0"
authors = ["_Frky <3105926+Frky@users.noreply.github.com>"]
edition = "2018"
[dependencies]
pcap = "0.7.0"
pcap-file = "1.1.1"
pnet = "0.26.0"
# pnet = { path = "libpnet" }
clap = "2.33.3"
log = "0.4.11"
stderrlog = "0.5.0"
itertools = "0.9.0"
rand = "0.7.3"
dns-parser = "0.8.0"
netdevice = "0.1.1"
bitflags = "1.2.1"
lazy_static = "1.4.0"
siphasher = "0.3"
chrono = "0.4.19"
byteorder = "1.4.3"
[[bin]]
name = "masscanned"
path = "src/masscanned.rs"

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possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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# Masscanned
**Masscanned** (name inspired, of course, by [masscan](https://github.com/robertdavidgraham/masscan))
is a network responder. Its purpose is to provide generic answers to as many protocols as possible,
and with as few asumptions as possible on the client's intentions.
> *Let them talk first.*
Just like [masscan](https://github.com/robertdavidgraham/masscan), **masscanned** implements its own,
userland network stack, similarly to [honeyd](http://honeyd.org/). It is designed to interact
with scanners and opportunistic bots as far as possible, and to support as many protocols as possible.
For example, when it receives network packets:
* **masscanned** answers to `ARP who is-at` with `ARP is-at` (for its IP addresses),
* **masscanned** answers to `ICMP Echo Request` with `ICMP Echo Reply`,
* **masscanned** answers to `TCP SYN` (any port) with `TCP SYN/ACK` on any port,
* **masscanned** answers to `HTTP` requests (any verb) over `TCP/UDP` (any port) with a `HTTP 401` web page.
![demo](doc/demo.gif)
**Masscanned** currently supports most common protocols at layers 2-3-4, and a few application
protocols:
* `Eth::ARP::REQ`,
* `Eth::IPv{4,6}::ICMP::ECHO-REQ`,
* `Eth::IPv{4,6}::TCP::SYN` (all ports),
* `Eth::IPv{4,6}::TCP::PSHACK` (all ports),
* `Eth::IPv6::ICMP::ND_NS`.
* `Eth::IPv{4,6}::{TCP,UDP}::HTTP` (all HTTP verbs),
* `Eth::IPv{4,6}::{TCP,UDP}::STUN`,
* `Eth::IPv{4,6}::{TCP,UDP}::SSH` (Server Protocol only).
## Try it locally
1. Build **masscanned**
```
$ cargo build
```
2. Create a new net namespace
```
# ip netns add masscanned
```
3. Create veth between the two namespaces
```
# ip link add vethmasscanned type veth peer veth netns masscanned
# ip link set vethmasscanned up
# ip -n masscanned link set veth up
```
4. Set IP on local veth to have a route for outgoing packets
```
# ip addr add dev vethmasscanned 192.168.0.0/31
```
5. Run **masscanned** in the namespace
```
# ip netns exec masscanned ./target/debug/masscanned --iface veth -v[vv]
```
6. With another terminal, send packets to **masscanned**
```
# arping 192.168.0.1
# ping 192.168.0.1
# nc -n -v 192.168.0.1 80
# nc -n -v -u 192.168.0.1 80
...
```
## Protocols
### Layer 2
#### ARP
`masscanned` anwsers to `ARP` requests, for requests that target an `IPv4` address
that is handled by `masscanned` (*i.e.*, an address that is in the
IP address file given with option `-f`).
The answer contains the first of the following possible `MAC` addresses:
* the `MAC` address specified with `-a` in command line if any,
* the `MAC` address of the interface specified with `-i` in command line if any,
* or the `masscanned` default `MAC` address, *i.e.*, `c0:ff:ee:c0:ff:ee`.
#### Ethernet
`masscanned` answers to `Ethernet` frames, if and only if the following requirements are met:
* the destination address of the frame should be handled by `masscanned`, which means:
* `masscanned` own `MAC` address,
* the broadcast `MAC` address `ff:ff:ff:ff:ff:ff`,
* a multicast `MAC` address corresponding to one of the `IPv4` addresses handled by `masscanned` ([RFC 1112](https://datatracker.ietf.org/doc/html/rfc1112)),
* a multicast `MAC` address corresponding to one of the `IPv6` addresses handled by `masscanned` ;
* `EtherType` field is one of `ARP`, `IPv4` or `IPv6`.
**Note:** even for a non-multicast IP address, `masscanned` will respond to L2 frames addressed to the corresponding multicast `MAC` address.
For instance, if `masscanned` handles `10.11.12.13`, it will answer to frames addressed to `01:00:5e:0b:0c:0d`.
### Layer 3
#### IPv4/IPv6
`masscanned` answers to `IPv4` and `IPv6` packets, only if:
* no `IP` address is specified in a file (*i.e.*, no `-f` option is specified or the file is empty),
**or**
* the destination IP address of the incoming packet is one of the IP addresses handled by `masscanned`.
An additionnal requirement is that the next layer protocol is supported - see below.
#### IPv4
The following L4 protocols are suppported for an `IPv4` packet:
* `ICMPv4`
* `UDP`
* `TCP`
If the next layer protocol is not one of them, the packet is dropped.
#### IPv6
The following L4 protocols are suppported for an `IPv6` packet:
* `ICMPv6`
* `UDP`
* `TCP`
If the next layer protocol is not one of them, the packet is dropped.
### Layer 3+/4
#### ICMPv4
`masscanned` answers to `ICMPv4` packets if and only if:
* the `ICMP` type of the incoming packet is `EchoRequest` (`8`),
* the `ICMP` code of the incoming packet is `0`.
If these conditions are met, `masscanned` answers with an `ICMP` packet of type `EchoReply` (`0`),
code `0` and the same payload as the incoming packet, as specified by [RFC 792](https://datatracker.ietf.org/doc/html/rfc792).
#### ICMPv6
`masscanned` answers to `ICMPv6` packets if and only if:
* the `ICMP` type is `NeighborSol` (`135`) **and**:
* no IP (v4 or v6) was speficied for `masscanned`
* **or** the target address of the Neighbor Solicitation is one of `masccanned`
*In that case, the answer is a `Neighbor Advertisement` (`136`) packet with `masscanned` `MAC` address*
**or**
* the `ICMP` type is `EchoRequest` (`128`)
*In that case, the answer is a `EchoReply` (`129`) packet.*
#### TCP
`masscanned` answers to the following `TCP` packets:
* if the received packet has flags `PSH` and `ACK`, `masscanned` checks the **SYNACK-cookie**, and if valid answers at least a `ACK`, or a `PSH-ACK` if
a supported protocol (Layer 5/6/7) has been detected,
* if the received packet has flag `ACK`, it is ignored,
* if the received packet has flag `RST` or `FIN-ACK`, it is ignored,
* if the received packet has flag `SYN`, then `masscanned` answers with a `SYN-ACK` packet, setting a **SYNACK-cookie** in the sequence number.
#### UDP
`masscanned` answers to an `UDP` packet if and only if the upper-layer protocol
is handled and provides an answer.
### Protocols
#### HTTP
#### STUN
#### SSH
`masscanned` answers to `SSH` `Client: Protocol` messages with the following `Server: Protocol` message:
```
SSH-2.0-1\r\n
```
## Internals
### Tests
#### Unit tests
```
$ cargo test
Compiling masscanned v0.2.0 (/zdata/workdir/masscanned)
Finished test [unoptimized + debuginfo] target(s) in 2.34s
Running target/debug/deps/masscanned-b86211a090e50323
running 36 tests
test client::client_info::tests::test_client_info_eq ... ok
test layer_2::arp::tests::test_arp_reply ... ok
test layer_3::ipv4::tests::test_ipv4_reply ... ok
test layer_3::ipv6::tests::test_ipv6_reply ... ok
test layer_4::icmpv6::tests::test_icmpv6_reply ... ok
test layer_2::tests::test_eth_reply ... ok
test layer_4::icmpv6::tests::test_nd_na_reply ... ok
test layer_4::tcp::tests::test_synack_cookie_ipv4 ... ok
test layer_4::icmpv4::tests::test_icmpv4_reply ... ok
test layer_4::tcp::tests::test_synack_cookie_ipv6 ... ok
test proto::http::test_http_request_field ... ok
test proto::http::test_http_request_no_field ... ok
test proto::http::test_http_request_line ... ok
test proto::http::test_http_verb ... ok
test proto::stun::tests::test_change_request_port ... ok
test proto::stun::tests::test_proto_stun_ipv6 ... ok
test proto::stun::tests::test_proto_stun_ipv4 ... ok
test proto::stun::tests::test_change_request_port_overflow ... ok
test smack::smack::tests::test_anchor_end ... ok
test smack::smack::tests::test_anchor_begin ... ok
test smack::smack::tests::test_multiple_matches ... ok
test smack::smack::tests::test_http_banner ... ok
test smack::smack::tests::test_multiple_matches_wildcard ... ok
test smack::smack::tests::test_proto ... ok
test smack::smack::tests::test_wildcard ... ok
test proto::tests::test_proto_dispatch_ssh ... ok
test proto::tests::test_proto_dispatch_stun ... ok
test synackcookie::tests::test_clientinfo ... ok
test synackcookie::tests::test_ip4_dst ... ok
test synackcookie::tests::test_ip4_src ... ok
test synackcookie::tests::test_ip4 ... ok
test synackcookie::tests::test_ip6 ... ok
test synackcookie::tests::test_key ... ok
test synackcookie::tests::test_tcp_dst ... ok
test synackcookie::tests::test_tcp_src ... ok
test smack::smack::tests::test_pattern ... ok
test result: ok. 36 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
```
#### Functional tests
```
# ./test/test_masscanned.py
tcpdump: listening on tap0, link-type EN10MB (Ethernet), snapshot length 262144 bytes
INFO test_arp_req......................................OK
INFO test_arp_req_other_ip.............................OK
INFO test_ipv4_req.....................................OK
INFO test_eth_req_other_mac............................OK
INFO test_ipv4_req_other_ip............................OK
INFO test_icmpv4_echo_req..............................OK
INFO test_icmpv6_neighbor_solicitation.................OK
INFO test_icmpv6_neighbor_solicitation_other_ip........OK
INFO test_icmpv6_echo_req..............................OK
INFO test_tcp_syn......................................OK
INFO test_ipv4_tcp_psh_ack.............................OK
INFO test_ipv6_tcp_psh_ack.............................OK
INFO test_ipv4_tcp_http................................OK
INFO test_ipv6_tcp_http................................OK
INFO test_ipv4_udp_http................................OK
INFO test_ipv6_udp_http................................OK
INFO test_ipv4_tcp_http_ko.............................OK
INFO test_ipv4_udp_http_ko.............................OK
INFO test_ipv6_tcp_http_ko.............................OK
INFO test_ipv6_udp_http_ko.............................OK
INFO test_ipv4_udp_stun................................OK
INFO test_ipv6_udp_stun................................OK
INFO test_ipv4_udp_stun_change_port....................OK
INFO test_ipv6_udp_stun_change_port....................OK
INFO test_ipv4_tcp_ssh.................................OK
INFO test_ipv4_udp_ssh.................................OK
INFO test_ipv6_tcp_ssh.................................OK
INFO test_ipv6_udp_ssh.................................OK
tcpdump: pcap_loop: The interface disappeared
604 packets captured
604 packets received by filter
0 packets dropped by kernel
```
### Logging Policy
* `ERR`: any error - will always be displayed.
* `WARN`, `-v`: responses sent by `masscanned`.
* `INFO`, `-vv`: packets not handled, packets ignored.
* `DEBUG`, `-vvv`: all packets received and sent by `masscanned`.
## To Do
* Drop incoming packets if checksum is incorrect
* Fix source address when answering to multicast packets.

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
use std::fmt::{Display, Error};
use std::hash::Hash;
use std::net::IpAddr;
use pnet::packet::ip::IpNextHeaderProtocol;
use pnet::util::MacAddr;
#[derive(PartialEq, Hash, Copy, Clone)]
pub struct ClientInfoSrcDst<A: Hash + PartialEq + Clone> {
pub src: Option<A>,
pub dst: Option<A>,
}
/* Structure to describe useful information
* about a client connection, such as:
* - source mac address
* - source and dest. IP address
* - transport layer protocol
* - source and dest. transport port
* - syn cookie
**/
#[derive(Copy, Clone)]
pub struct ClientInfo {
pub mac: ClientInfoSrcDst<MacAddr>,
pub ip: ClientInfoSrcDst<IpAddr>,
pub transport: Option<IpNextHeaderProtocol>,
pub port: ClientInfoSrcDst<u16>,
pub cookie: Option<u32>,
}
impl ClientInfo {
pub fn new() -> Self {
ClientInfo {
mac: ClientInfoSrcDst::<MacAddr> {
src: None,
dst: None,
},
ip: ClientInfoSrcDst::<IpAddr> {
src: None,
dst: None,
},
transport: None,
port: ClientInfoSrcDst::<u16> {
src: None,
dst: None,
},
cookie: None,
}
}
}
impl PartialEq for ClientInfo {
fn eq(&self, other: &Self) -> bool {
if self.mac != other.mac {
return false;
}
if self.ip != other.ip {
return false;
}
if self.transport != other.transport {
return false;
}
if self.port != other.port {
return false;
}
/* this next case should never occur with TCP and UDP,
* but this implementation tries to remain transport-protocol-agnostic
**/
if self.cookie != other.cookie {
return false;
}
true
}
}
impl Eq for ClientInfo {}
impl Display for ClientInfo {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), Error> {
write!(
f,
"{:>width_ip$}:{:<width_port$} > {:>width_port$}:{:<width_ip$}",
self.ip.src.unwrap(),
self.port.src.unwrap(),
self.port.dst.unwrap(),
self.ip.dst.unwrap(),
width_ip = 15,
width_port = 5
)
}
}
#[cfg(test)]
mod tests {
use super::*;
use pnet::packet::ip::IpNextHeaderProtocols;
use std::net::Ipv4Addr;
impl ClientInfo {
pub fn new_test() -> Self {
ClientInfo {
mac: ClientInfoSrcDst {
src: Some(MacAddr::new(0, 0, 0, 0, 0, 0)),
dst: Some(MacAddr::new(0, 0, 0, 0, 0, 0)),
},
ip: ClientInfoSrcDst {
src: Some(IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0))),
dst: Some(IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0))),
},
transport: Some(IpNextHeaderProtocols::Tcp),
port: ClientInfoSrcDst {
src: Some(0),
dst: Some(0),
},
cookie: Some(0),
}
}
}
#[test]
fn test_client_info_eq() {
let client_ref = ClientInfo::new_test();
/* two clients with different mac addr should be different */
let mut client_test = ClientInfo::new_test();
assert!(client_test == client_ref);
client_test.mac.src = Some(MacAddr::new(1, 0, 0, 0, 0, 0));
assert!(client_test != client_ref);
client_test.mac.src = Some(MacAddr::new(0, 0, 0, 0, 0, 0));
client_test.mac.dst = Some(MacAddr::new(1, 0, 0, 0, 0, 0));
assert!(client_test != client_ref);
client_test.mac.dst = Some(MacAddr::new(0, 0, 0, 0, 0, 0));
assert!(client_test == client_ref);
/* two clients with different ip addr should be different */
let mut client_test = ClientInfo::new_test();
assert!(client_test == client_ref);
client_test.ip.src = Some(IpAddr::V4(Ipv4Addr::new(1, 0, 0, 0)));
assert!(client_test != client_ref);
client_test.ip.src = Some(IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)));
client_test.ip.dst = Some(IpAddr::V4(Ipv4Addr::new(1, 0, 0, 0)));
assert!(client_test != client_ref);
/* two clients with different tranport layer should be different */
let mut client_test = ClientInfo::new_test();
assert!(client_test == client_ref);
client_test.transport = Some(IpNextHeaderProtocols::Udp);
assert!(client_test != client_ref);
client_test.transport = Some(IpNextHeaderProtocols::Tcp);
assert!(client_test == client_ref);
/* two clients with different tranport ports should be different */
let mut client_test = ClientInfo::new_test();
assert!(client_test == client_ref);
client_test.port.src = Some(1);
assert!(client_test != client_ref);
client_test.port.src = Some(0);
client_test.port.dst = Some(1);
assert!(client_test != client_ref);
client_test.port.dst = Some(0);
assert!(client_test == client_ref);
/* two clients with different cookies should be different */
let mut client_test = ClientInfo::new_test();
assert!(client_test == client_ref);
client_test.cookie = Some(1);
assert!(client_test != client_ref);
client_test.cookie = Some(0);
assert!(client_test == client_ref);
}
}

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
mod client_info;
pub use client_info::{ClientInfo, ClientInfoSrcDst};

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
use log::*;
use std::net::IpAddr;
use pnet::packet::{
arp::{ArpHardwareTypes, ArpOperations, ArpPacket, MutableArpPacket},
/* Import needed for traits */
Packet as _,
};
use crate::Masscanned;
pub fn repl<'a, 'b>(
arp_req: &'a ArpPacket,
masscanned: &Masscanned,
) -> Option<MutableArpPacket<'b>> {
let mut arp_repl =
MutableArpPacket::owned(arp_req.packet().to_vec()).expect("error parsing ARP packet");
/* Build ARP answer depending of the type of request */
match arp_req.get_operation() {
ArpOperations::Request => {
let ip = IpAddr::V4(arp_req.get_target_proto_addr());
/* Ignore ARP requests for IP addresses not handled by masscanned */
if let Some(ip_addr_list) = masscanned.ip_addresses {
if !ip_addr_list.contains(&ip) {
info!(
"Ignoring ARP request from {} for IP {}",
arp_req.get_sender_hw_addr(),
ip
);
return None;
}
}
/* Fill ARP reply */
arp_repl.set_operation(ArpOperations::Reply);
arp_repl.set_hardware_type(ArpHardwareTypes::Ethernet);
arp_repl.set_sender_hw_addr(masscanned.mac);
arp_repl.set_target_hw_addr(arp_req.get_sender_hw_addr().to_owned());
arp_repl.set_target_proto_addr(arp_req.get_sender_proto_addr().to_owned());
arp_repl.set_sender_proto_addr(arp_req.get_target_proto_addr().to_owned());
warn!(
"ARP-Reply to {} for IP {}",
arp_req.get_sender_hw_addr(),
arp_repl.get_sender_proto_addr()
);
}
_ => {
info!("ARP Operation not handled: {:?}", arp_repl.get_operation());
return None;
}
};
Some(arp_repl)
}
#[cfg(test)]
mod tests {
use super::*;
use std::collections::HashSet;
use std::net::Ipv4Addr;
use std::str::FromStr;
use pnet::util::MacAddr;
#[test]
fn test_arp_reply() {
let mut ips = HashSet::new();
ips.insert(IpAddr::V4(Ipv4Addr::new(0, 1, 2, 3)));
/* Construct masscanned context object */
let masscanned = Masscanned {
synack_key: [0, 0],
mac: MacAddr::from_str("00:11:22:33:44:55").expect("error parsing MAC address"),
iface: None,
ip_addresses: Some(&ips),
};
let mut arp_req =
MutableArpPacket::owned([0; 28].to_vec()).expect("error constructing ARP request");
arp_req.set_hardware_type(ArpHardwareTypes::Ethernet);
arp_req.set_operation(ArpOperations::Request);
arp_req.set_sender_hw_addr(
MacAddr::from_str("55:44:33:22:11:00").expect("error parsing MAC address"),
);
arp_req.set_target_hw_addr(
MacAddr::from_str("00:00:00:00:00:00").expect("error parsing MAC address"),
);
arp_req.set_sender_proto_addr(Ipv4Addr::new(3, 2, 1, 0));
/* Test getting an ARP reply for a legitimate IP address */
arp_req.set_target_proto_addr(Ipv4Addr::new(0, 1, 2, 3));
if let Some(arp_repl) = repl(&arp_req.to_immutable(), &masscanned) {
assert!(arp_repl.get_hardware_type() == ArpHardwareTypes::Ethernet);
assert!(arp_repl.get_operation() == ArpOperations::Reply);
assert!(arp_repl.get_sender_hw_addr() == masscanned.mac);
assert!(arp_repl.get_sender_proto_addr() == Ipv4Addr::new(0, 1, 2, 3));
} else {
panic!("Expected ARP reply - got None");
}
/* Ensure no response is returned for an other IP address */
arp_req.set_target_proto_addr(Ipv4Addr::new(1, 1, 2, 3));
let arp_repl = repl(&arp_req.to_immutable(), &masscanned);
assert!(arp_repl == None);
}
}

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
use log::*;
use std::collections::HashSet;
use std::net::IpAddr;
use pnet::packet::{
arp::ArpPacket,
ethernet::{EtherTypes, EthernetPacket, MutableEthernetPacket},
ipv4::checksum as ipv4_checksum,
ipv4::Ipv4Packet,
ipv6::Ipv6Packet,
Packet as Pkt,
};
use pnet::util::MacAddr;
use crate::client::ClientInfo;
use crate::layer_3;
use crate::Masscanned;
pub mod arp;
/* representation of a 6-bytes Ethernet address */
type EtherAddr = [u8; 6];
/* This function builds the list of layer-2 destination addresses
* that masscanned is authorized to answer to. It includes:
* - masscanned own MAC address,
* - layer 2 broadcast MAC addresses,
* - layer 2 IPv6 multicast MAC address,
* - layer 2 IPv6 solicited-node multicast addresses for each IPv6 address
* of masscanned
**/
pub fn get_authorized_eth_addr(
mac: &MacAddr,
ip_addresses: Option<&HashSet<IpAddr>>,
) -> HashSet<MacAddr> {
let mut auth_addr = HashSet::new();
auth_addr.insert(MacAddr::broadcast());
auth_addr.insert(*mac);
/* add IPv6 multicast addr */
auth_addr.insert(
"33:33:00:00:00:01"
.parse()
.expect("error parsing generic MAC address"),
);
/* Add:
* - IPv4 multicast address for every IPv4
* - IPv6 Solicited-Node multicast address for every IPv6
**/
if let Some(ip_addr) = ip_addresses {
for addr in ip_addr {
match addr {
IpAddr::V4(ipv4) => {
let mut eth_ma: EtherAddr = [0; 6];
eth_ma[0] = 0x01;
eth_ma[1] = 0x00;
eth_ma[2] = 0x5e;
/* RFC 1112 - https://datatracker.ietf.org/doc/html/rfc1112
* Section 6.4:
* An IP host group address is mapped to an Ethernet multicast address
* by placing the low-order 23-bits of the IP address into the low-order
* 23 bits of the Ethernet multicast address 01-00-5E-00-00-00 (hex).
**/
eth_ma[3] = ipv4.octets()[1] & 0x7f;
eth_ma[4] = ipv4.octets()[2];
eth_ma[5] = ipv4.octets()[3];
auth_addr.insert(MacAddr::from(eth_ma));
}
IpAddr::V6(ipv6) => {
let mut eth_snma: EtherAddr = [0; 6];
eth_snma[0] = 0x33;
eth_snma[1] = 0x33;
/* multicast MAC address corresponding to solicited-node
* multicast IPv6 address */
eth_snma[2] = 0xff;
eth_snma[3] = ipv6.octets()[13];
eth_snma[4] = ipv6.octets()[14];
eth_snma[5] = ipv6.octets()[15];
auth_addr.insert(MacAddr::from(eth_snma));
}
}
}
}
auth_addr
}
pub fn reply<'a, 'b>(
eth_req: &'a EthernetPacket,
masscanned: &Masscanned,
mut client_info: &mut ClientInfo,
) -> Option<MutableEthernetPacket<'b>> {
debug!("receiving Ethernet packet: {:?}", eth_req);
let mut eth_repl;
/* First, check if the destination MAC address is one of those masscanned
* is authorized to answer to (avoid answering to packets addressed to
* other machines)
**/
if !get_authorized_eth_addr(&masscanned.mac, masscanned.ip_addresses)
.contains(&eth_req.get_destination())
{
info!(
"Ignoring Ethernet packet from {} to {}",
eth_req.get_source(),
eth_req.get_destination(),
);
return None;
}
/* Fill client information for this packet with MAC addresses (src and dst) */
client_info.mac.src = Some(eth_req.get_source());
client_info.mac.dst = Some(eth_req.get_destination());
/* Build next layer payload for answer depending on the incoming packet */
match eth_req.get_ethertype() {
/* Construct answer to ARP request */
EtherTypes::Arp => {
let arp_req = ArpPacket::new(eth_req.payload()).expect("error parsing ARP packet");
if let Some(arp_repl) = arp::repl(&arp_req, masscanned) {
let arp_len = arp_repl.packet().len();
let eth_len = EthernetPacket::minimum_packet_size() + arp_len;
eth_repl = MutableEthernetPacket::owned(vec![0; eth_len])
.expect("error constructing an Ethernet Packet");
eth_repl.set_ethertype(EtherTypes::Arp);
eth_repl.set_payload(arp_repl.packet());
} else {
return None;
}
}
/* Construct answer to IPv4 packet */
EtherTypes::Ipv4 => {
let ipv4_req = if let Some(p) = Ipv4Packet::new(eth_req.payload()) {
p
} else {
warn!("error parsing IPv4 packet");
return None;
};
if let Some(mut ipv4_repl) =
layer_3::ipv4::repl(&ipv4_req, masscanned, &mut client_info)
{
ipv4_repl.set_checksum(ipv4_checksum(&ipv4_repl.to_immutable()));
let ipv4_len = ipv4_repl.packet().len();
let eth_len = EthernetPacket::minimum_packet_size() + ipv4_len;
eth_repl = MutableEthernetPacket::owned(vec![0; eth_len])
.expect("error constructing an Ethernet Packet");
eth_repl.set_ethertype(EtherTypes::Ipv4);
eth_repl.set_payload(ipv4_repl.packet());
} else {
return None;
}
}
/* Construct answer to IPv6 packet */
EtherTypes::Ipv6 => {
let ipv6_req = Ipv6Packet::new(eth_req.payload()).expect("error parsing IPv6 packet");
if let Some(ipv6_repl) = layer_3::ipv6::repl(&ipv6_req, masscanned, &mut client_info) {
let ipv6_len = ipv6_repl.packet().len();
let eth_len = EthernetPacket::minimum_packet_size() + ipv6_len;
eth_repl = MutableEthernetPacket::owned(vec![0; eth_len])
.expect("error constructing an Ethernet Packet");
eth_repl.set_ethertype(EtherTypes::Ipv6);
eth_repl.set_payload(ipv6_repl.packet());
} else {
return None;
}
}
/* Log & drop unknown network protocol */
_ => {
info!("Ethernet type not handled: {:?}", eth_req.get_ethertype());
return None;
}
};
eth_repl.set_source(masscanned.mac);
eth_repl.set_destination(eth_req.get_source());
debug!("sending Ethernet packet: {:?}", eth_repl);
Some(eth_repl)
}
#[cfg(test)]
mod tests {
use super::*;
use std::net::{Ipv4Addr, Ipv6Addr};
use std::str::FromStr;
#[test]
fn test_eth_reply() {
/* test payload is IP(src="3.2.1.0", dst=".".join(str(b) for b in [0xaa, 0x99,
* 0x88, 0x77]))/ICMP() */
let payload = b"E\x00\x00\x1c\x00\x01\x00\x00@\x01C\xce\x03\x02\x01\x00\xaa\x99\x88w\x08\x00\xf7\xff\x00\x00\x00\x00";
let test_mac_addr =
MacAddr::from_str("55:44:33:22:11:00").expect("error parsing MAC address");
let mut client_info = ClientInfo::new();
let mut ips = HashSet::new();
ips.insert(IpAddr::V4(Ipv4Addr::new(0xaa, 0x99, 0x88, 0x77)));
ips.insert(IpAddr::V6(Ipv6Addr::new(
0x7777, 0x7777, 0x7777, 0x7777, 0x7777, 0x7777, 0xaabb, 0xccdd,
)));
/* Construct masscanned context object */
let masscanned = Masscanned {
synack_key: [0, 0],
mac: MacAddr::from_str("00:11:22:33:44:55").expect("error parsing MAC address"),
iface: None,
ip_addresses: Some(&ips),
};
let mut eth_req = MutableEthernetPacket::owned(vec![
0;
EthernetPacket::minimum_packet_size()
+ payload.len()
])
.expect("error constructing ethernet packet");
eth_req.set_source(test_mac_addr);
eth_req.set_payload(payload);
/* Test answer to legitimate dest. */
let dest_mac = [
masscanned.mac,
MacAddr::from_str("ff:ff:ff:ff:ff:ff").unwrap(),
MacAddr::from_str("01:00:5e:19:88:77").unwrap(),
MacAddr::from_str("33:33:ff:bb:cc:dd").unwrap(),
];
for mac in dest_mac.iter() {
println!("testing mac: {:?}", mac);
eth_req.set_ethertype(EtherTypes::Ipv4);
eth_req.set_destination(*mac);
if let Some(eth_repl) = reply(&eth_req.to_immutable(), &masscanned, &mut client_info) {
assert!(eth_repl.get_source() == masscanned.mac);
assert!(eth_repl.get_destination() == test_mac_addr);
assert!(eth_repl.get_ethertype() == EtherTypes::Ipv4);
} else {
panic!("expected an Ethernet answer, got None");
}
}
/* Test answer to non-legitimate dest. */
let dest_mac = [
MacAddr::from_str("aa:bb:cc:dd:ee:ff").unwrap(),
MacAddr::from_str("ff:ff:ff:ff:ff:fe").unwrap(),
MacAddr::from_str("01:00:5e:00:11:22").unwrap(),
MacAddr::from_str("33:33:aa:bb:cc:de").unwrap(),
MacAddr::from_str("01:00:5e:99:88:77").unwrap(),
MacAddr::from_str("33:33:aa:bb:cc:dd").unwrap(),
];
for mac in dest_mac.iter() {
println!("testing mac: {:?}", mac);
eth_req.set_ethertype(EtherTypes::Ipv4);
eth_req.set_destination(*mac);
let eth_repl = reply(&eth_req.to_immutable(), &masscanned, &mut client_info);
assert!(eth_repl == None);
}
}
}

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
use log::*;
use std::convert::TryInto;
use std::net::IpAddr;
use pnet::packet::{
icmp::checksum as ipv4_checksum_icmp,
icmp::IcmpPacket,
ip::IpNextHeaderProtocols,
ipv4::{Ipv4Flags, Ipv4Packet, MutableIpv4Packet},
tcp::ipv4_checksum as ipv4_checksum_tcp,
tcp::TcpPacket,
udp::ipv4_checksum as ipv4_checksum_udp,
udp::UdpPacket,
Packet,
};
use crate::client::ClientInfo;
use crate::layer_4;
use crate::Masscanned;
pub fn repl<'a, 'b>(
ip_req: &'a Ipv4Packet,
masscanned: &Masscanned,
mut client_info: &mut ClientInfo,
) -> Option<MutableIpv4Packet<'b>> {
debug!("receiving IPv4 packet: {:?}", ip_req);
/* If masscanned is configured with IP addresses, then
* check that the dest. IP address of the packet is one of
* those handled by masscanned - otherwise, drop the packet.
**/
if let Some(ip_addr_list) = masscanned.ip_addresses {
if !ip_addr_list.contains(&IpAddr::V4(ip_req.get_destination())) {
info!(
"Ignoring IP packet from {} for {}",
ip_req.get_source(),
ip_req.get_destination()
);
return None;
}
}
/* Fill client info with source and dest. IP addresses */
client_info.ip.src = Some(IpAddr::V4(ip_req.get_source()));
client_info.ip.dst = Some(IpAddr::V4(ip_req.get_destination()));
/* Fill client info with transport layer procotol */
client_info.transport = Some(ip_req.get_next_level_protocol());
let mut ip_repl;
match ip_req.get_next_level_protocol() {
/* Answer to an ICMP packet */
IpNextHeaderProtocols::Icmp => {
let icmp_req = IcmpPacket::new(ip_req.payload()).expect("error parsing ICMP packet");
if let Some(mut icmp_repl) = layer_4::icmpv4::repl(&icmp_req, masscanned, &client_info)
{
icmp_repl.set_checksum(ipv4_checksum_icmp(&icmp_repl.to_immutable()));
let icmp_len = icmp_repl.packet().len();
let ip_len = MutableIpv4Packet::minimum_packet_size() + icmp_len;
ip_repl = MutableIpv4Packet::owned(vec![0; ip_len])
.expect("error constructing an IPv4 packet");
ip_repl.set_total_length(ip_len as u16);
// FIXME
ip_repl.set_header_length(5);
ip_repl.set_payload(icmp_repl.packet());
ip_repl.set_next_level_protocol(IpNextHeaderProtocols::Icmp);
} else {
return None;
}
}
/* Answer to a TCP packet */
IpNextHeaderProtocols::Tcp => {
let tcp_req = TcpPacket::new(ip_req.payload()).expect("error parsing TCP packet");
if let Some(mut tcp_repl) = layer_4::tcp::repl(&tcp_req, masscanned, &mut client_info) {
tcp_repl.set_checksum(ipv4_checksum_tcp(
&tcp_repl.to_immutable(),
&ip_req.get_destination(),
&ip_req.get_source(),
));
let tcp_len = tcp_repl.packet().len();
let ip_len = Ipv4Packet::minimum_packet_size() + tcp_len;
ip_repl = MutableIpv4Packet::owned(vec![0; ip_len])
.expect("error constructing an IPv4 packet");
ip_repl.set_total_length(ip_len as u16);
// FIXME
ip_repl.set_header_length(5);
ip_repl.set_payload(tcp_repl.packet());
ip_repl.set_next_level_protocol(IpNextHeaderProtocols::Tcp);
} else {
return None;
}
}
/* Answer to an UDP packet */
IpNextHeaderProtocols::Udp => {
let udp_req = UdpPacket::new(ip_req.payload()).expect("error parsing UDP packet");
if let Some(mut udp_repl) = layer_4::udp::repl(&udp_req, masscanned, &mut client_info) {
udp_repl.set_checksum(ipv4_checksum_udp(
&udp_repl.to_immutable(),
&ip_req.get_destination(),
&ip_req.get_source(),
));
let udp_len = udp_repl.packet().len();
udp_repl.set_length(udp_len.try_into().unwrap());
debug!("udp len: {}", udp_len);
let ip_len = Ipv4Packet::minimum_packet_size() + udp_len;
ip_repl = MutableIpv4Packet::owned(vec![0; ip_len])
.expect("error constructing an IPv4 packet");
ip_repl.set_total_length(ip_len as u16);
// FIXME
ip_repl.set_header_length(5);
ip_repl.set_payload(udp_repl.packet());
ip_repl.set_next_level_protocol(IpNextHeaderProtocols::Udp);
} else {
return None;
}
}
/* Next layer protocol not handled (yet) - dropping packet */
_ => {
info!(
"IPv4 upper layer not handled: {:?}",
ip_req.get_next_level_protocol()
);
return None;
}
};
/* Set IP packet fields before sending */
ip_repl.set_version(4);
ip_repl.set_ttl(64);
ip_repl.set_identification(0);
/* These values are already initialized with 0s
* ip_repl.set_dscp(0);
* ip_repl.set_ecn(0);
* ip_repl.set_identification(0);
**/
/* Do not fragment packet */
ip_repl.set_flags(Ipv4Flags::DontFragment);
/* Set source and dest. IP address */
/* FIXME when dest. was a multicast IP address */
ip_repl.set_source(ip_req.get_destination());
ip_repl.set_destination(ip_req.get_source());
debug!("sending IPv4 packet: {:?}", ip_repl);
Some(ip_repl)
}
#[cfg(test)]
mod tests {
use super::*;
use std::collections::HashSet;
use std::net::Ipv4Addr;
use std::str::FromStr;
use pnet::util::MacAddr;
#[test]
fn test_ipv4_reply() {
/* test payload is scapy> ICMP() */
let payload = b"\x08\x00\xf7\xff\x00\x00\x00\x00";
let mut client_info = ClientInfo::new();
let test_ip_addr = Ipv4Addr::new(3, 2, 1, 0);
let masscanned_ip_addr = Ipv4Addr::new(0, 1, 2, 3);
let mut ips = HashSet::new();
ips.insert(IpAddr::V4(masscanned_ip_addr));
/* Construct masscanned context object */
let masscanned = Masscanned {
synack_key: [0, 0],
mac: MacAddr::from_str("00:11:22:33:44:55").expect("error parsing MAC address"),
iface: None,
ip_addresses: Some(&ips),
};
let mut ip_req =
MutableIpv4Packet::owned(vec![0; Ipv4Packet::minimum_packet_size() + payload.len()])
.expect("error constructing IPv4 packet");
ip_req.set_version(4);
ip_req.set_ttl(64);
ip_req.set_identification(0);
ip_req.set_flags(Ipv4Flags::DontFragment);
ip_req.set_source(test_ip_addr);
ip_req.set_header_length(5);
/* Set test payload for layer 4 */
ip_req.set_total_length(ip_req.packet().len() as u16);
ip_req.set_payload(payload);
/* Set next protocol */
ip_req.set_next_level_protocol(IpNextHeaderProtocols::Icmp);
/* Send to a legitimate IP address */
ip_req.set_destination(masscanned_ip_addr);
if let Some(ip_repl) = repl(&ip_req.to_immutable(), &masscanned, &mut client_info) {
assert!(ip_repl.get_destination() == test_ip_addr);
assert!(ip_repl.get_source() == masscanned_ip_addr);
assert!(ip_repl.get_next_level_protocol() == IpNextHeaderProtocols::Icmp);
assert!(ip_repl.get_total_length() == ip_repl.packet().len() as u16);
} else {
panic!("expected an IP answer, got None");
}
/* Send to a non-legitimate IP address */
ip_req.set_destination(Ipv4Addr::new(2, 2, 2, 2));
assert!(repl(&ip_req.to_immutable(), &masscanned, &mut client_info) == None);
}
}

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
use log::*;
use std::net::IpAddr;
use pnet::packet::{
icmpv6::{checksum as icmpv6_checksum, Icmpv6Packet, Icmpv6Types},
ip::IpNextHeaderProtocols,
ipv6::{Ipv6Packet, MutableIpv6Packet},
tcp::{ipv6_checksum as ipv6_checksum_tcp, TcpPacket},
udp::{ipv6_checksum as ipv6_checksum_udp, UdpPacket},
Packet,
};
use crate::client::ClientInfo;
use crate::layer_4;
use crate::Masscanned;
pub fn repl<'a, 'b>(
ip_req: &'a Ipv6Packet,
masscanned: &Masscanned,
mut client_info: &mut ClientInfo,
) -> Option<MutableIpv6Packet<'b>> {
debug!("receiving IPv6 packet: {:?}", ip_req);
let src = ip_req.get_source();
let mut dst = ip_req.get_destination();
/* If masscanned is configured with IP addresses, check that
* the dest. IP address corresponds to one of those
* Otherwise, drop the packet.
**/
if let Some(ip_addr_list) = masscanned.ip_addresses {
if !ip_addr_list.contains(&IpAddr::V6(dst))
&& ip_req.get_next_header() != IpNextHeaderProtocols::Icmpv6
{
info!("Ignoring IP packet from {} for {}", &src, &dst);
return None;
}
}
/* Fill client info with source and dest. IP address */
client_info.ip.src = Some(IpAddr::V6(ip_req.get_source()));
client_info.ip.dst = Some(IpAddr::V6(ip_req.get_destination()));
/* Fill client info with transport layer procotol */
client_info.transport = Some(ip_req.get_next_header());
let mut ip_repl;
match ip_req.get_next_header() {
/* Answer to ICMPv6 */
IpNextHeaderProtocols::Icmpv6 => {
let icmp_req =
Icmpv6Packet::new(ip_req.payload()).expect("error parsing ICMPv6 packet");
if let (Some(mut icmp_repl), dst_addr) =
layer_4::icmpv6::repl(&icmp_req, masscanned, &client_info)
{
if let Some(ip) = dst_addr {
dst = ip;
}
/* Compute checksum of upper layer */
icmp_repl.set_checksum(icmpv6_checksum(&icmp_repl.to_immutable(), &src, &dst));
/* Compute answer length */
let icmp_len = icmp_repl.packet().len();
let ip_len = MutableIpv6Packet::minimum_packet_size() + icmp_len;
/* Create answer packet */
ip_repl = MutableIpv6Packet::owned(vec![0; ip_len])
.expect("error constructing an IPv6 packet");
/* Set next header protocol and payload */
ip_repl.set_next_header(IpNextHeaderProtocols::Icmpv6);
ip_repl.set_payload_length(icmp_len as u16);
ip_repl.set_payload(&icmp_repl.packet().to_vec());
/* Special value of hlim for ICMP */
if let Icmpv6Types::NeighborAdvert = icmp_repl.get_icmpv6_type() {
ip_repl.set_hop_limit(255);
};
} else {
return None;
}
}
/* Answer to TCP */
IpNextHeaderProtocols::Tcp => {
let tcp_req = TcpPacket::new(ip_req.payload()).expect("error parsing TCP packet");
if let Some(mut tcp_repl) = layer_4::tcp::repl(&tcp_req, masscanned, &mut client_info) {
/* Compute and set TCP checksum */
tcp_repl.set_checksum(ipv6_checksum_tcp(
&tcp_repl.to_immutable(),
&ip_req.get_destination(),
&ip_req.get_source(),
));
/* Compute answer length */
let tcp_len = tcp_repl.packet().len();
let ip_len = Ipv6Packet::minimum_packet_size() + tcp_len;
/* Create answer packet */
ip_repl = MutableIpv6Packet::owned(vec![0; ip_len])
.expect("error constructing an IPv6 packet");
/* Set next header protocol and payload */
ip_repl.set_next_header(IpNextHeaderProtocols::Tcp);
ip_repl.set_payload_length(tcp_len as u16);
ip_repl.set_payload(&tcp_repl.packet());
} else {
return None;
}
}
/* Answer to UDP */
IpNextHeaderProtocols::Udp => {
let udp_req = UdpPacket::new(ip_req.payload()).expect("error parsing UDP packet");
if let Some(mut udp_repl) = layer_4::udp::repl(&udp_req, masscanned, &mut client_info) {
/* Compute and set UDP checksum */
udp_repl.set_checksum(ipv6_checksum_udp(
&udp_repl.to_immutable(),
&ip_req.get_destination(),
&ip_req.get_source(),
));
/* Compute answer length */
let udp_len = udp_repl.packet().len();
let ip_len = Ipv6Packet::minimum_packet_size() + udp_len;
/* Create answer packet */
ip_repl = MutableIpv6Packet::owned(vec![0; ip_len])
.expect("error constructing an IPv6 packet");
/* Set next header protocol and payload */
ip_repl.set_next_header(IpNextHeaderProtocols::Udp);
ip_repl.set_payload_length(udp_len as u16);
ip_repl.set_payload(&udp_repl.packet());
} else {
return None;
}
}
/* Other protocols are not handled (yet) - dropping */
_ => {
info!(
"IPv6 upper layer not handled: {:?}",
ip_req.get_next_header()
);
return None;
}
};
/* If not already set, we set the hlim value */
if ip_repl.get_hop_limit() == 0 {
ip_repl.set_hop_limit(64);
}
/* Set IP version */
ip_repl.set_version(6);
/* Set packet source and dest. */
ip_repl.set_source(dst);
ip_repl.set_destination(src);
debug!("sending IPv6 packet: {:?}", ip_repl);
Some(ip_repl)
}
#[cfg(test)]
mod tests {
use super::*;
use std::collections::HashSet;
use std::net::Ipv6Addr;
use std::str::FromStr;
use pnet::util::MacAddr;
#[test]
fn test_ipv6_reply() {
/* test payload is scapy> IPv6(src="7777:6666:5555:4444:3333:2222:1111:0000",
* dst="0000:1111:2222:3333:4444:5555:6666:7777")/TCP(sport=12345, dport=54321,
* flags="S"))[TCP] */
let payload = b"09\xd41\x00\x00\x00\x00\x00\x00\x00\x00P\x02 \x00\xcf\xbc\x00\x00";
let mut client_info = ClientInfo::new();
let test_ip_addr = Ipv6Addr::new(
0x7777, 0x6666, 0x5555, 0x4444, 0x3333, 0x2222, 0x1111, 0x0000,
);
let masscanned_ip_addr = Ipv6Addr::new(
0x0000, 0x1111, 0x2222, 0x3333, 0x4444, 0x5555, 0x6666, 0x7777,
);
let mut ips = HashSet::new();
ips.insert(IpAddr::V6(masscanned_ip_addr));
/* Construct masscanned context object */
let masscanned = Masscanned {
synack_key: [0, 0],
mac: MacAddr::from_str("00:11:22:33:44:55").expect("error parsing MAC address"),
iface: None,
ip_addresses: Some(&ips),
};
let mut ip_req =
MutableIpv6Packet::owned(vec![0; Ipv6Packet::minimum_packet_size() + payload.len()])
.expect("error constructing IPv6 packet");
ip_req.set_version(6);
ip_req.set_source(test_ip_addr);
/* Set test payload for layer 4 */
ip_req.set_payload_length(payload.len() as u16);
ip_req.set_payload(payload);
/* Set next protocol */
ip_req.set_next_header(IpNextHeaderProtocols::Tcp);
/* Send to a legitimate IP address */
ip_req.set_destination(masscanned_ip_addr);
if let Some(ip_repl) = repl(&ip_req.to_immutable(), &masscanned, &mut client_info) {
assert!(ip_repl.get_destination() == test_ip_addr);
assert!(ip_repl.get_source() == masscanned_ip_addr);
assert!(ip_repl.get_next_header() == IpNextHeaderProtocols::Tcp);
assert!(ip_repl.get_payload_length() == ip_repl.payload().len() as u16);
} else {
panic!("expected an IP answer, got None");
}
/* Send to a non-legitimate IP address */
ip_req.set_destination(Ipv6Addr::new(
0x0000, 0x1111, 0x2222, 0x3333, 0x4444, 0x5555, 0x6666, 0x7778,
));
assert!(repl(&ip_req.to_immutable(), &masscanned, &mut client_info) == None);
}
}

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
pub mod ipv4;
pub mod ipv6;

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
use log::*;
use pnet::packet::{
icmp::{IcmpCode, IcmpPacket, IcmpTypes, MutableIcmpPacket},
Packet,
};
use crate::client::ClientInfo;
use crate::Masscanned;
pub fn repl<'a, 'b>(
icmp_req: &'a IcmpPacket,
_masscanned: &Masscanned,
mut _client_info: &ClientInfo,
) -> Option<MutableIcmpPacket<'b>> {
debug!("receiving ICMPv4 packet: {:?}", icmp_req);
let mut icmp_repl;
match icmp_req.get_icmp_type() {
IcmpTypes::EchoRequest => {
/* Check code of ICMP packet */
if icmp_req.get_icmp_code() != IcmpCode(0) {
info!("ICMP code not handled: {:?}", icmp_req.get_icmp_code());
return None;
}
/* Compute answer length */
let payload_len = icmp_req.payload().len();
let icmp_len = MutableIcmpPacket::minimum_packet_size() + payload_len;
/* Construct answer packet */
icmp_repl = MutableIcmpPacket::owned(vec![0; icmp_len])
.expect("error constructing an ICMP packet");
/* Set ICMP type and code */
icmp_repl.set_icmp_type(IcmpTypes::EchoReply);
icmp_repl.set_icmp_code(IcmpCode(0));
/* Set payload identical to incoming packet
* See RFC 792 - https://datatracker.ietf.org/doc/html/rfc792 p15
* "The data received in the echo message must be returned in the echo
* reply message."
**/
icmp_repl.set_payload(icmp_req.payload());
warn!("ICMP-Echo-Reply to ICMP-Echo-Request");
}
_ => {
return None;
}
};
debug!("sending ICMPv4 packet: {:?}", icmp_repl);
Some(icmp_repl)
}
#[cfg(test)]
mod tests {
use super::*;
use std::str::FromStr;
use pnet::util::MacAddr;
#[test]
fn test_icmpv4_reply() {
/* test payload is scapy> ICMP() */
let payload = b"testpayload";
let mut client_info = ClientInfo::new();
/* Construct masscanned context object */
let masscanned = Masscanned {
synack_key: [0, 0],
mac: MacAddr::from_str("00:11:22:33:44:55").expect("error parsing MAC address"),
iface: None,
ip_addresses: None,
};
let mut icmp_req =
MutableIcmpPacket::owned(vec![0; IcmpPacket::minimum_packet_size() + payload.len()])
.expect("error constructing ICMPv4 packet");
/* Set ICMP payload */
icmp_req.set_payload(payload);
/* Set legitimate ICMP type and code */
icmp_req.set_icmp_type(IcmpTypes::EchoRequest);
icmp_req.set_icmp_code(IcmpCode(0));
if let Some(icmp_repl) = repl(&icmp_req.to_immutable(), &masscanned, &mut client_info) {
assert!(icmp_repl.get_icmp_type() == IcmpTypes::EchoReply);
assert!(icmp_repl.get_icmp_code() == IcmpCode(0));
assert!(icmp_repl.payload() == payload);
} else {
panic!("expected an IP answer, got None");
}
/* Set wrong code */
icmp_req.set_icmp_code(IcmpCode(1));
assert!(repl(&icmp_req.to_immutable(), &masscanned, &mut client_info) == None);
/* Set wrong type */
icmp_req.set_icmp_code(IcmpCode(0));
icmp_req.set_icmp_type(IcmpTypes::EchoReply);
assert!(repl(&icmp_req.to_immutable(), &masscanned, &mut client_info) == None);
/* Try with another payload */
icmp_req.set_icmp_type(IcmpTypes::EchoRequest);
let payload = b"newpayload!";
icmp_req.set_payload(payload);
if let Some(icmp_repl) = repl(&icmp_req.to_immutable(), &masscanned, &mut client_info) {
assert!(icmp_repl.get_icmp_type() == IcmpTypes::EchoReply);
assert!(icmp_repl.get_icmp_code() == IcmpCode(0));
assert!(icmp_repl.payload() == payload);
} else {
panic!("expected an IP answer, got None");
}
}
}

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
use log::*;
use std::convert::From;
use std::net::{IpAddr, Ipv6Addr};
use pnet::packet::{
icmpv6::ndp::{
Icmpv6Codes, MutableNeighborAdvertPacket, NdpOption, NdpOptionPacket, NdpOptionTypes,
NeighborAdvert, NeighborAdvertFlags, NeighborSolicitPacket,
},
icmpv6::{Icmpv6, Icmpv6Packet, Icmpv6Types, MutableIcmpv6Packet},
Packet,
};
use crate::client::ClientInfo;
use crate::Masscanned;
pub fn nd_ns_repl<'a, 'b>(
nd_ns_req: &'a NeighborSolicitPacket,
masscanned: &Masscanned,
_client_info: &ClientInfo,
) -> Option<MutableNeighborAdvertPacket<'b>> {
debug!("receiving ND-NS packet: {:?}", nd_ns_req);
/* If masscanned is configured with IP addresses, then
* check that the dest. IP address of the packet is one of
* those handled by masscanned - otherwise, drop the packet.
**/
if let Some(addresses) = masscanned.ip_addresses {
if !addresses.contains(&IpAddr::V6(nd_ns_req.get_target_addr())) {
return None;
}
}
/* Set answer option to TargetLLAddr(2) */
let ndp_opt = NdpOption {
option_type: NdpOptionTypes::TargetLLAddr,
/* From RFC 4861, section 4.6:
* Length 8-bit unsigned integer. The length of the option
* (including the type and length fields) in units of
* 8 octets. The value 0 is invalid. Nodes MUST
* silently discard an ND packet that contains an
* option with length zero.
**/
length: 1,
/* From RFC 4861, section 4.6:
* Options should be padded when necessary to ensure that they end on
* their natural 64-bit boundaries.
* In this case, no need as 6 bytes (mac addr) + 2 bytes (option type
* and length) = 8 bytes
**/
data: Vec::from(<[u8; 6]>::from(masscanned.mac)),
};
/* Compute site of options to construct ndp packet */
let ndp_opt_size = NdpOptionPacket::packet_size(&ndp_opt);
/* Neighbor advertisement response content */
let ndp_na = NeighborAdvert {
icmpv6_type: Icmpv6Types::NeighborAdvert,
icmpv6_code: Icmpv6Codes::NoCode,
checksum: 0,
flags: NeighborAdvertFlags::Override | NeighborAdvertFlags::Solicited,
reserved: 0,
target_addr: nd_ns_req.get_target_addr(),
options: vec![],
payload: vec![],
};
/* Construct ND-NA response packet */
let mut nd_na_repl = MutableNeighborAdvertPacket::owned(vec![
0;
/* Size includes the options */
MutableNeighborAdvertPacket::packet_size(&ndp_na)
+ ndp_opt_size
])
.expect("error constructing a ND-NA packet");
/* Set content of response */
nd_na_repl.populate(&ndp_na);
/* Set content of options */
nd_na_repl.set_options(&[ndp_opt]);
warn!("ND-NA to ND-NS for {}", nd_ns_req.get_target_addr());
debug!("sending ND-NA packet: {:?}", nd_na_repl);
Some(nd_na_repl)
}
/* Because L3 may not know the dest. IPv6 address of the packet in the case
* of a ND-NS packet, this function returns the reply *plus* the dest. IPv6
* address in the case of a ND-NS, so that L3 knows to which masscanned IP
* address the packet was targetting */
pub fn repl<'a, 'b>(
icmp_req: &'a Icmpv6Packet,
masscanned: &Masscanned,
client_info: &ClientInfo,
) -> (Option<MutableIcmpv6Packet<'b>>, Option<Ipv6Addr>) {
debug!("receiving ICMPv6 packet: {:?}", icmp_req);
let mut dst_ip = None;
if icmp_req.get_icmpv6_code() != Icmpv6Codes::NoCode {
return (None, None);
}
let mut icmp_repl;
match icmp_req.get_icmpv6_type() {
/* Answer to a neighbor solicitation packet (aka ARP for IPv6) */
Icmpv6Types::NeighborSolicit => {
let nd_ns_req =
NeighborSolicitPacket::new(icmp_req.packet()).expect("error parsing ND-NS packet");
/* Construct the answer to the NS - should be a ND-NA */
if let Some(nd_na_repl) = nd_ns_repl(&nd_ns_req, masscanned, &client_info) {
dst_ip = Some(nd_ns_req.get_target_addr());
icmp_repl = MutableIcmpv6Packet::owned(nd_na_repl.packet().to_vec())
.expect("error constructing an ICMPv6 packet");
} else {
return (None, None);
}
}
/* Answer to an echo request packet */
Icmpv6Types::EchoRequest => {
/* Construct the echo reply packet */
let echo_repl = Icmpv6 {
icmpv6_type: Icmpv6Types::EchoReply,
icmpv6_code: Icmpv6Codes::NoCode,
checksum: 0,
/* Same payload as the echo request */
payload: icmp_req.payload().to_vec(),
};
icmp_repl = MutableIcmpv6Packet::owned(vec![0; Icmpv6Packet::packet_size(&echo_repl)])
.expect("error constructing an ICMPv6 packet");
icmp_repl.populate(&echo_repl);
warn!("ICMPv6-Echo-Reply to ICMPv6-Echo-Request");
}
_ => {
info!(
"ICMPv6 packet not handled: {:?}",
icmp_req.get_icmpv6_type()
);
return (None, None);
}
};
debug!("sending ICMPv6 packet: {:?}", icmp_repl);
(Some(icmp_repl), dst_ip)
}
#[cfg(test)]
mod tests {
use super::*;
use std::collections::HashSet;
use std::net::Ipv6Addr;
use std::str::FromStr;
use pnet::packet::icmpv6::ndp::{MutableNeighborSolicitPacket, NeighborSolicit};
use pnet::util::MacAddr;
#[test]
fn test_nd_na_reply() {
let client_info = ClientInfo::new();
let masscanned_ip_addr = Ipv6Addr::new(
0x0000, 0x1111, 0x2222, 0x3333, 0x4444, 0x5555, 0x6666, 0x7777,
);
let mut ips = HashSet::new();
ips.insert(IpAddr::V6(masscanned_ip_addr));
/* Construct masscanned context object */
let masscanned = Masscanned {
synack_key: [0, 0],
mac: MacAddr::from_str("00:11:22:33:44:55").expect("error parsing MAC address"),
iface: None,
ip_addresses: Some(&ips),
};
/* Legitimate solicitation */
let ndp_ns = NeighborSolicit {
icmpv6_type: Icmpv6Types::NeighborSolicit,
icmpv6_code: Icmpv6Codes::NoCode,
checksum: 0,
reserved: 0,
target_addr: masscanned_ip_addr,
options: vec![],
payload: vec![],
};
let mut nd_ns = MutableNeighborSolicitPacket::owned(vec![
0;
/* Size includes the options */
MutableNeighborSolicitPacket::packet_size(&ndp_ns)
//+ ndp_opt_size
])
.expect("error constructing ND-NS packet");
nd_ns.populate(&ndp_ns);
if let Some(nd_na) = nd_ns_repl(&nd_ns.to_immutable(), &masscanned, &client_info) {
assert!(nd_na.get_icmpv6_code() == Icmpv6Codes::NoCode);
assert!(nd_na.get_icmpv6_type() == Icmpv6Types::NeighborAdvert);
assert!(nd_na.get_target_addr() == masscanned_ip_addr);
assert!(nd_na.get_options().len() == 1);
let nd_na_opt = &nd_na.get_options()[0];
assert!(nd_na_opt.option_type == NdpOptionTypes::TargetLLAddr);
assert!(nd_na_opt.data.len() == 6);
assert!(nd_na_opt.length == 1);
assert!(
MacAddr::new(
nd_na_opt.data[0],
nd_na_opt.data[1],
nd_na_opt.data[2],
nd_na_opt.data[3],
nd_na_opt.data[4],
nd_na_opt.data[5]
) == masscanned.mac
);
} else {
panic!("expected a ND NA answer, got None");
}
/* Solicitation for another IPv6 address */
let ndp_ns = NeighborSolicit {
icmpv6_type: Icmpv6Types::NeighborSolicit,
icmpv6_code: Icmpv6Codes::NoCode,
checksum: 0,
reserved: 0,
target_addr: Ipv6Addr::new(
0x0000, 0x1111, 0x2222, 0x3333, 0x4444, 0x5555, 0x6666, 0x8888,
),
options: vec![],
payload: vec![],
};
nd_ns.populate(&ndp_ns);
assert!(nd_ns_repl(&nd_ns.to_immutable(), &masscanned, &client_info) == None);
}
#[test]
fn test_icmpv6_reply() {
let payload = b"testpayload";
let client_info = ClientInfo::new();
let masscanned_ip_addr = Ipv6Addr::new(
0x0000, 0x1111, 0x2222, 0x3333, 0x4444, 0x5555, 0x6666, 0x7777,
);
let mut ips = HashSet::new();
ips.insert(IpAddr::V6(masscanned_ip_addr));
/* Construct masscanned context object */
let masscanned = Masscanned {
synack_key: [0, 0],
mac: MacAddr::from_str("00:11:22:33:44:55").expect("error parsing MAC address"),
iface: None,
ip_addresses: Some(&ips),
};
let mut icmpv6_echo_req = MutableIcmpv6Packet::owned(vec![
0;
MutableIcmpv6Packet::minimum_packet_size()
+ payload.len()
])
.expect("error constructing Icmpv6 packet");
icmpv6_echo_req.set_icmpv6_code(Icmpv6Codes::NoCode);
icmpv6_echo_req.set_icmpv6_type(Icmpv6Types::EchoRequest);
icmpv6_echo_req.set_payload(payload);
if let (Some(_icmpv6_echo_repl), _) =
repl(&icmpv6_echo_req.to_immutable(), &masscanned, &client_info)
{
} else {
panic!("expected ICMPv6 echo repy - got None");
}
}
}

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
pub mod icmpv4;
pub mod icmpv6;
pub mod tcp;
pub mod udp;

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
use log::*;
use pnet::packet::{
tcp::{MutableTcpPacket, TcpFlags, TcpPacket},
Packet,
};
use crate::client::ClientInfo;
use crate::proto;
use crate::synackcookie;
use crate::Masscanned;
pub fn repl<'a, 'b>(
tcp_req: &'a TcpPacket,
masscanned: &Masscanned,
mut client_info: &mut ClientInfo,
) -> Option<MutableTcpPacket<'b>> {
debug!("receiving TCP packet: {:?}", tcp_req);
/* Fill client info with source and dest. TCP port */
client_info.port.src = Some(tcp_req.get_source());
client_info.port.dst = Some(tcp_req.get_destination());
/* Construct response TCP packet */
let mut tcp_repl;
match tcp_req.get_flags() {
/* Answer to data */
flags if flags & (TcpFlags::PSH | TcpFlags::ACK) == (TcpFlags::PSH | TcpFlags::ACK) => {
/* First check the synack cookie */
let ackno = if tcp_req.get_acknowledgement() > 0 {
tcp_req.get_acknowledgement() - 1
} else {
/* underflow hack */
0xFFFFFFFF
};
/* Compute syncookie */
if let Ok(cookie) = synackcookie::generate(&client_info, &masscanned.synack_key) {
if cookie != ackno {
info!("PSH-ACK ignored: synackcookie not valid");
return None;
}
client_info.cookie = Some(cookie);
}
warn!("ACK to PSH-ACK on port {}", tcp_req.get_destination());
let payload = tcp_req.payload();
/* Any answer to upper-layer protocol? */
if let Some(repl) = proto::repl(&payload, masscanned, &mut client_info) {
tcp_repl = MutableTcpPacket::owned(
[vec![0; MutableTcpPacket::minimum_packet_size()], repl].concat(),
)
.expect("error constructing a TCP packet");
tcp_repl.set_flags(TcpFlags::ACK | TcpFlags::PSH);
} else {
tcp_repl =
MutableTcpPacket::owned(vec![0; MutableTcpPacket::minimum_packet_size()])
.expect("error constructing a TCP packet");
tcp_repl.set_flags(TcpFlags::ACK);
}
tcp_repl.set_acknowledgement(tcp_req.get_sequence() + (tcp_req.payload().len() as u32));
tcp_repl.set_sequence(tcp_req.get_acknowledgement());
}
/* Answer to ACK: nothing */
flags if flags == TcpFlags::ACK => {
/* answer here when server needs to speak first after handshake */
return None;
}
/* Answer to RST and FIN: nothing */
flags if (flags == TcpFlags::RST || flags == (TcpFlags::FIN | TcpFlags::ACK)) => {
return None;
}
/* Answer to SYN */
flags if flags & TcpFlags::SYN == TcpFlags::SYN => {
tcp_repl = MutableTcpPacket::owned(vec![0; MutableTcpPacket::minimum_packet_size()])
.expect("error constructing a TCP packet");
tcp_repl.set_flags(TcpFlags::ACK);
tcp_repl.set_flags(TcpFlags::SYN | TcpFlags::ACK);
tcp_repl.set_acknowledgement(tcp_req.get_sequence() + 1);
/* generate a SYNACK-cookie (same as masscan) */
tcp_repl.set_sequence(
synackcookie::generate(&client_info, &masscanned.synack_key).unwrap(),
);
warn!("SYN-ACK to ACK on port {}", tcp_req.get_destination());
}
_ => {
info!("TCP flag not handled: {}", tcp_req.get_flags());
return None;
}
}
/* Set source and dest. port for response packet from client info */
/* Note: client info could have been modified by upper layers (e.g., STUN) */
tcp_repl.set_source(client_info.port.dst.unwrap());
tcp_repl.set_destination(client_info.port.src.unwrap());
/* Set TCP headers */
tcp_repl.set_data_offset(5);
tcp_repl.set_window(65535);
debug!("sending TCP packet: {:?}", tcp_repl);
Some(tcp_repl)
}
#[cfg(test)]
mod tests {
use super::*;
use crate::client::ClientInfoSrcDst;
use pnet::util::MacAddr;
use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
#[test]
fn test_synack_cookie_ipv4() {
let masscanned = Masscanned {
mac: MacAddr(0, 0, 0, 0, 0, 0),
ip_addresses: None,
synack_key: [0x06a0a1d63f305e9b, 0xd4d4bcbb7304875f],
iface: None,
};
/* reference */
let ip_src = IpAddr::V4(Ipv4Addr::new(27, 198, 143, 1));
let ip_dst = IpAddr::V4(Ipv4Addr::new(90, 64, 122, 203));
let tcp_sport = 65000;
let tcp_dport = 80;
let mut client_info = ClientInfo {
mac: ClientInfoSrcDst {
src: None,
dst: None,
},
ip: ClientInfoSrcDst {
src: Some(ip_src),
dst: Some(ip_dst),
},
transport: None,
port: ClientInfoSrcDst {
src: Some(tcp_sport),
dst: Some(tcp_dport),
},
cookie: None,
};
let cookie = synackcookie::generate(&client_info, &masscanned.synack_key).unwrap();
let mut tcp_req =
MutableTcpPacket::owned(vec![0; MutableTcpPacket::minimum_packet_size()]).unwrap();
tcp_req.set_source(tcp_sport);
tcp_req.set_destination(tcp_dport);
tcp_req.set_flags(TcpFlags::SYN);
let some_tcp_repl = repl(&tcp_req.to_immutable(), &masscanned, &mut client_info);
if some_tcp_repl == None {
assert!(false);
return;
}
let tcp_repl = some_tcp_repl.unwrap();
assert!(synackcookie::_check(
&client_info,
tcp_repl.get_sequence(),
&masscanned.synack_key
));
assert!(cookie == tcp_repl.get_sequence());
}
#[test]
fn test_synack_cookie_ipv6() {
let masscanned = Masscanned {
mac: MacAddr(0, 0, 0, 0, 0, 0),
ip_addresses: None,
synack_key: [0x06a0a1d63f305e9b, 0xd4d4bcbb7304875f],
iface: None,
};
/* reference */
let ip_src = IpAddr::V6(Ipv6Addr::new(234, 52, 183, 47, 184, 172, 64, 141));
let ip_dst = IpAddr::V6(Ipv6Addr::new(25, 179, 227, 231, 53, 216, 45, 144));
let tcp_sport = 65000;
let tcp_dport = 80;
let mut client_info = ClientInfo {
mac: ClientInfoSrcDst {
src: None,
dst: None,
},
ip: ClientInfoSrcDst {
src: Some(ip_src),
dst: Some(ip_dst),
},
transport: None,
port: ClientInfoSrcDst {
src: Some(tcp_sport),
dst: Some(tcp_dport),
},
cookie: None,
};
let cookie = synackcookie::generate(&client_info, &masscanned.synack_key).unwrap();
let mut tcp_req =
MutableTcpPacket::owned(vec![0; MutableTcpPacket::minimum_packet_size()]).unwrap();
tcp_req.set_source(tcp_sport);
tcp_req.set_destination(tcp_dport);
tcp_req.set_flags(TcpFlags::SYN);
let some_tcp_repl = repl(&tcp_req.to_immutable(), &masscanned, &mut client_info);
if some_tcp_repl == None {
assert!(false);
return;
}
let tcp_repl = some_tcp_repl.unwrap();
assert!(synackcookie::_check(
&client_info,
tcp_repl.get_sequence(),
&masscanned.synack_key
));
assert!(cookie == tcp_repl.get_sequence());
}
}

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
use log::*;
use pnet::packet::{
udp::{MutableUdpPacket, UdpPacket},
Packet,
};
use crate::client::ClientInfo;
use crate::proto;
use crate::Masscanned;
pub fn repl<'a, 'b>(
udp_req: &'a UdpPacket,
masscanned: &Masscanned,
mut client_info: &mut ClientInfo,
) -> Option<MutableUdpPacket<'b>> {
debug!("receiving UDP packet: {:?}", udp_req);
/* Fill client info with source and dest. UDP port */
client_info.port.src = Some(udp_req.get_source());
client_info.port.dst = Some(udp_req.get_destination());
let payload = udp_req.payload();
let mut udp_repl;
if let Some(repl) = proto::repl(&payload, masscanned, &mut client_info) {
udp_repl = MutableUdpPacket::owned(
[vec![0; MutableUdpPacket::minimum_packet_size()], repl].concat(),
)
.expect("error constructing a UDP packet");
udp_repl.set_length(udp_repl.packet().len() as u16);
} else {
return None;
}
/* Set source and dest. port for response packet from client info */
/* Note: client info could have been modified by upper layers (e.g., STUN) */
udp_repl.set_source(client_info.port.dst.unwrap());
udp_repl.set_destination(client_info.port.src.unwrap());
debug!("sending UDP packet: {:?}", udp_repl);
Some(udp_repl)
}

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
#[macro_use]
extern crate bitflags;
extern crate lazy_static;
use std::boxed::Box;
use std::collections::HashSet;
use std::fs::File;
use std::net::IpAddr;
use std::str::FromStr;
use clap::{App, Arg};
use log::*;
use pnet::{
datalink::{self, Channel::Ethernet, DataLinkReceiver, DataLinkSender, NetworkInterface},
packet::{
ethernet::{EthernetPacket, MutableEthernetPacket},
Packet,
},
util::MacAddr,
};
use crate::utils::IpAddrParser;
mod client;
mod layer_2;
mod layer_3;
mod layer_4;
mod proto;
mod smack;
mod synackcookie;
mod utils;
const VERSION: &str = "0.2.0";
const DEFAULT_MAC_ADDR: &str = "c0:ff:ee:c0:ff:ee";
pub struct Masscanned<'a> {
pub synack_key: [u64; 2],
pub mac: MacAddr,
/* iface is an Option to make tests easier */
pub iface: Option<&'a NetworkInterface>,
pub ip_addresses: Option<&'a HashSet<IpAddr>>,
}
/* Get the L2 network interface from its name */
// TODO testme
// TODO handle errors
fn get_interface(iface_name: &str) -> Option<NetworkInterface> {
let interface_names_match = |iface: &NetworkInterface| iface.name == iface_name;
// Find the network interface with the provided name
let interfaces = datalink::interfaces();
interfaces.into_iter().find(interface_names_match)
}
/* Get two L2 channels:
* - one to send data
* - one to receive data
*/
// TODO testme
// TODO handle errors
fn get_channel(
interface: &NetworkInterface,
) -> (
Box<(dyn DataLinkSender + 'static)>,
Box<(dyn DataLinkReceiver + 'static)>,
) {
// Create a new channel, dealing with layer 2 packets
match datalink::channel(&interface, Default::default()) {
Ok(Ethernet(tx, rx)) => (tx, rx),
Ok(_) => panic!("Unhandled channel type"),
Err(e) => panic!(
"An error occurred when creating the datalink channel: {}",
e
),
}
}
fn reply<'a, 'b>(packet: &'a [u8], masscanned: &Masscanned) -> Option<MutableEthernetPacket<'b>> {
let mut client_info = client::ClientInfo::new();
let eth_req = EthernetPacket::new(packet).expect("impossible to parse Ethernet packet");
layer_2::reply(&eth_req, masscanned, &mut client_info)
}
fn main() {
/* parse arguments from CLI */
let args = App::new("Network responder - answer them all")
.version(VERSION)
.about("Network answering machine for various network protocols (L2-L3-L4 + applications)")
.arg(
Arg::with_name("interface")
.short("i")
.long("iface")
.value_name("iface")
.help("the interface to use for receiving/sending packets")
.required(true)
.takes_value(true),
)
.arg(
Arg::with_name("mac")
.short("a")
.long("mac-addr")
.help("MAC address to use in the response packets")
.takes_value(true),
)
.arg(
Arg::with_name("ip")
.short("f")
.long("ip-addr-file")
.help("File with the list of IP addresses to impersonate")
.takes_value(true),
)
.arg(
Arg::with_name("verbosity")
.short("v")
.multiple(true)
.help("Increase message verbosity"),
)
.get_matches();
let verbose = args.occurrences_of("verbosity") as usize;
/* initialise logger */
stderrlog::new()
.module(module_path!())
.verbosity(verbose)
.init()
.expect("error while initializing logging module");
warn!("warn messages enabled");
info!("info messages enabled");
debug!("debug messages enabled");
trace!("trace messages enabled");
info!("Command line arguments:");
for arg in &args.args {
info!("....{:?}", arg);
}
let iface = if let Some(i) = get_interface(
args.value_of("interface")
.expect("error parsing iface argument"),
) {
i
} else {
error!(
"Cannot open interface \"{}\" - are you sure it exists?",
args.value_of("interface")
.expect("error parsing iface argument")
);
return;
};
if iface.flags & (netdevice::IFF_UP.bits() as u32) == 0 {
error!("specified interface is DOWN");
return;
}
let mac = if let Some(m) = args.value_of("mac") {
MacAddr::from_str(m).expect("error parsing provided MAC address")
} else if let Some(m) = iface.mac {
m
} else {
MacAddr::from_str(DEFAULT_MAC_ADDR).expect("error parsing default MAC address")
};
/* Parse ip address file specified */
/* FIXME: .and_then(|path| File::open(path).map(|file| )).unwrap_or_default() ? */
let ip_list = if let Some(ref path) = args.value_of("ip") {
if let Ok(file) = File::open(path) {
info!("parsing ip address file: {}", &path);
file.extract_ip_addresses_only(None)
} else {
HashSet::new()
}
} else {
HashSet::new()
};
let ip_addresses = if !ip_list.is_empty() {
Some(&ip_list)
} else {
None
};
let masscanned = Masscanned {
synack_key: [0, 0],
mac,
iface: Some(&iface),
ip_addresses,
};
info!("interface......{}", masscanned.iface.unwrap().name);
info!("mac address....{}", masscanned.mac);
let (mut tx, mut rx) = get_channel(masscanned.iface.unwrap());
loop {
/* check if network interface is still up */
if masscanned.iface.unwrap().flags & (netdevice::IFF_UP.bits() as u32) == 0 {
error!("interface is DOWN - aborting");
break;
}
match rx.next() {
Ok(packet) => {
if let Some(pkt_rep) = reply(packet, &masscanned) {
tx.send_to(pkt_rep.packet(), None);
} else {
info!("packet not handled: {:?}", packet);
}
}
Err(e) => {
error!("An error occurred while reading: {}", e);
}
}
}
}

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
use log::*;
use chrono::Utc;
use lazy_static::lazy_static;
use std::str;
use crate::client::ClientInfo;
use crate::smack::{
Smack, SmackFlags, BASE_STATE, NO_MATCH, SMACK_CASE_INSENSITIVE, UNANCHORED_STATE,
};
use crate::Masscanned;
pub const HTTP_VERBS: [&str; 9] = [
"GET", "PUT", "POST", "HEAD", "DELETE", "CONNECT", "OPTIONS", "TRACE", "PATCH",
];
#[derive(Copy, Clone)]
enum HttpField {
Verb,
// Incomplete,
// Server,
ContentLength,
ContentType,
// Via,
// Location,
Unknown,
NewLine,
}
const HTTP_STATE_START: usize = 0;
const HTTP_STATE_VERB: usize = 1;
const HTTP_STATE_SPACE: usize = 2;
const HTTP_STATE_URI: usize = 3;
const HTTP_STATE_H: usize = 4;
const HTTP_STATE_T1: usize = 5;
const HTTP_STATE_T2: usize = 6;
const HTTP_STATE_P: usize = 7;
const HTTP_STATE_SLASH: usize = 8;
const HTTP_STATE_VERSION_MAJ: usize = 9;
const HTTP_STATE_VERSION_MIN: usize = 10;
const HTTP_STATE_FIELD_START: usize = 32;
const HTTP_STATE_FIELD_NAME: usize = 33;
const HTTP_STATE_FIELD_VALUE: usize = 34;
const HTTP_STATE_CONTENT: usize = 64;
const HTTP_STATE_FAIL: usize = 0xFFFF;
struct ProtocolState {
state: usize,
state_bis: usize,
smack_state: usize,
smack_id: usize,
http_verb: Vec<u8>,
http_uri: Vec<u8>,
}
impl ProtocolState {
fn new() -> Self {
ProtocolState {
state: HTTP_STATE_START,
state_bis: 0,
smack_state: BASE_STATE,
smack_id: NO_MATCH,
http_verb: Vec::<u8>::new(),
http_uri: Vec::<u8>::new(),
}
}
}
const HTTP_PATTERN: [(&str, HttpField, SmackFlags); 4] = [
(
"Content-Length",
HttpField::ContentLength,
SmackFlags::ANCHOR_BEGIN,
),
(
"Content-Type",
HttpField::ContentType,
SmackFlags::ANCHOR_BEGIN,
),
(":", HttpField::Unknown, SmackFlags::EMPTY),
("\n", HttpField::NewLine, SmackFlags::EMPTY),
];
lazy_static! {
static ref HTTP_SMACK: Smack = http_init();
}
fn http_init() -> Smack {
let mut smack = Smack::new("http".to_string(), SMACK_CASE_INSENSITIVE);
for verb in HTTP_VERBS.iter() {
smack.add_pattern(
verb.as_bytes(),
HttpField::Verb as usize,
SmackFlags::ANCHOR_BEGIN,
);
}
for p in HTTP_PATTERN.iter() {
smack.add_pattern(p.0.as_bytes(), p.1 as usize, p.2);
}
smack.compile();
smack
}
fn http_parse(pstate: &mut ProtocolState, data: &[u8]) {
/* RFC 2616:
* The Request-Line begins with a method token, followed by the
* Request-URI and the protocol version, and ending with CRLF. The
* elements are separated by SP characters. No CR or LF is allowed
* except in the final CRLF sequence.
*/
let mut i = 0;
while i < data.len() {
match pstate.state {
HTTP_STATE_START => {
pstate.state += 1;
continue;
}
HTTP_STATE_VERB => {
let i_save = i;
pstate.smack_id = HTTP_SMACK.search_next(&mut pstate.smack_state, data, &mut i);
pstate.http_verb.extend_from_slice(&data[i_save..i]);
i -= 1;
if pstate.smack_id == HttpField::Verb as usize {
pstate.state += 1;
} else if pstate.smack_id == NO_MATCH {
/* if in UNANCHORED_STATE, it means we'll never get a match from now on */
if pstate.smack_state == UNANCHORED_STATE {
pstate.state = HTTP_STATE_FAIL;
} else {
/* continue getting input */
}
}
}
HTTP_STATE_SPACE => {
if data[i] == b' ' {
pstate.state += 1;
} else {
pstate.state = HTTP_STATE_FAIL;
}
}
HTTP_STATE_URI => {
if data[i] != b' ' {
pstate.http_uri.push(data[i]);
} else {
pstate.state += 1;
}
}
HTTP_STATE_H | HTTP_STATE_T1 | HTTP_STATE_T2 | HTTP_STATE_P | HTTP_STATE_SLASH => {
if data[i] != b"HTTP/"[pstate.state - HTTP_STATE_H] {
pstate.state = HTTP_STATE_FAIL;
} else {
pstate.state += 1;
}
}
HTTP_STATE_VERSION_MAJ => {
if data[i] == b'.' {
pstate.state += 1;
} else if !data[i].is_ascii_digit() {
pstate.state = HTTP_STATE_FAIL;
}
}
HTTP_STATE_VERSION_MIN => {
/* ignore \r to be compliant with relaxed implementations of the protocole */
if data[i] == b'\r' {
} else if data[i] == b'\n' {
pstate.state = HTTP_STATE_FIELD_START;
} else if !data[i].is_ascii_digit() {
pstate.state = HTTP_STATE_FAIL;
}
}
HTTP_STATE_FIELD_START => {
if data[i] == b'\r' {
} else if data[i] == b'\n' {
pstate.state_bis = 0;
pstate.state = HTTP_STATE_CONTENT;
} else {
pstate.state_bis = 0;
pstate.state = HTTP_STATE_FIELD_NAME;
}
}
HTTP_STATE_FIELD_NAME => {
if data[i] == b'\r' || data[i] == b'\n' {
pstate.state = HTTP_STATE_FAIL;
} else if data[i] == b':' {
pstate.state = HTTP_STATE_FIELD_VALUE;
}
}
HTTP_STATE_FIELD_VALUE => {
if data[i] == b'\r' {
} else if data[i] == b'\n' {
pstate.state = HTTP_STATE_FIELD_START;
}
}
HTTP_STATE_FAIL => {
return;
}
HTTP_STATE_CONTENT => { /* so far, do not parse content */ }
_ => {}
};
i += 1;
}
}
pub fn repl<'a>(
data: &'a [u8],
_masscanned: &Masscanned,
_client_info: &ClientInfo,
) -> Option<Vec<u8>> {
debug!("receiving HTTP data");
let mut pstate = ProtocolState::new();
http_parse(&mut pstate, data);
if pstate.state == HTTP_STATE_FAIL {
debug!("data in not correctly formatted - not responding");
debug!("pstate: {}", pstate.state);
return None;
}
let content = "\
<html>
<head><title>401 Authorization Required</title></head>
<body bgcolor=\"white\">
<center><h1>401 Authorization Required</h1></center>
<hr><center>nginx/1.14.2</center>
</body>
</html>
";
let repl_data = format!(
"\
HTTP/1.1 401 Unauthorized
Server: nginx/1.14.2
Date: {}
Content-Type: text/html
Content-Length: {}
Connection: keep-alive
WWW-Authenticate: Basic realm=\"Access to admin page\"
{}
",
Utc::now().to_rfc2822(),
content.len(),
content
)
.into_bytes();
debug!("sending HTTP data");
warn!(
"HTTP/1.1 401 to {} {}",
str::from_utf8(&pstate.http_verb).unwrap(),
str::from_utf8(&pstate.http_uri).unwrap()
);
Some(repl_data)
}
#[test]
fn test_http_verb() {
/* all at once */
for verb in HTTP_VERBS.iter() {
let mut pstate = ProtocolState::new();
assert!(pstate.state == HTTP_STATE_START);
assert!(pstate.smack_state == BASE_STATE);
assert!(pstate.smack_id == NO_MATCH);
http_parse(&mut pstate, &verb.as_bytes());
assert!(pstate.state == HTTP_STATE_SPACE);
assert!(pstate.smack_id == (HttpField::Verb as usize));
assert!(pstate.http_verb == verb.as_bytes());
}
/* byte by byte */
for verb in HTTP_VERBS.iter() {
let mut pstate = ProtocolState::new();
assert!(pstate.state == HTTP_STATE_START);
assert!(pstate.smack_state == BASE_STATE);
assert!(pstate.smack_id == NO_MATCH);
for i in 0..verb.len() {
if i > 0 {
assert!(pstate.state == HTTP_STATE_VERB);
assert!(pstate.smack_id == NO_MATCH);
}
http_parse(&mut pstate, &verb.as_bytes()[i..i + 1]);
}
assert!(pstate.state == HTTP_STATE_SPACE);
assert!(pstate.smack_id == (HttpField::Verb as usize));
assert!(pstate.http_verb == verb.as_bytes());
}
/* KO test: XXX */
let mut pstate = ProtocolState::new();
assert!(pstate.state == HTTP_STATE_START);
assert!(pstate.smack_state == BASE_STATE);
assert!(pstate.smack_id == NO_MATCH);
http_parse(&mut pstate, "XXX".as_bytes());
assert!(pstate.state == HTTP_STATE_FAIL);
assert!(pstate.smack_state == UNANCHORED_STATE);
assert!(pstate.smack_id == NO_MATCH);
/* KO test: XGET */
let mut pstate = ProtocolState::new();
assert!(pstate.state == HTTP_STATE_START);
assert!(pstate.smack_state == BASE_STATE);
assert!(pstate.smack_id == NO_MATCH);
http_parse(&mut pstate, "XGET".as_bytes());
assert!(pstate.state == HTTP_STATE_FAIL);
assert!(pstate.smack_state == UNANCHORED_STATE);
assert!(pstate.smack_id == NO_MATCH);
/* KO test: GEX */
let mut pstate = ProtocolState::new();
assert!(pstate.state == HTTP_STATE_START);
assert!(pstate.smack_state == BASE_STATE);
assert!(pstate.smack_id == NO_MATCH);
http_parse(&mut pstate, "GEX".as_bytes());
assert!(pstate.state == HTTP_STATE_FAIL);
assert!(pstate.smack_state == UNANCHORED_STATE);
assert!(pstate.smack_id == NO_MATCH);
/* KO test: GE T */
let mut pstate = ProtocolState::new();
assert!(pstate.state == HTTP_STATE_START);
assert!(pstate.smack_state == BASE_STATE);
assert!(pstate.smack_id == NO_MATCH);
http_parse(&mut pstate, "GE T".as_bytes());
assert!(pstate.state == HTTP_STATE_FAIL);
assert!(pstate.smack_state == UNANCHORED_STATE);
assert!(pstate.smack_id == NO_MATCH);
}
#[test]
fn test_http_request_line() {
let mut pstate = ProtocolState::new();
let data = "GET /index.php HTTP/1.1\r\n".as_bytes();
for i in 0..data.len() {
http_parse(&mut pstate, &data[i..i + 1]);
if i < 2 {
assert!(pstate.state == HTTP_STATE_VERB);
} else if i == 2 {
assert!(pstate.state == HTTP_STATE_SPACE);
} else if 3 <= i && i <= 13 {
assert!(pstate.state == HTTP_STATE_URI);
} else if 14 <= i && i <= 19 {
assert!(pstate.state == HTTP_STATE_H + (i - 14));
} else if i == 20 {
assert!(pstate.state == HTTP_STATE_VERSION_MAJ);
} else if 21 <= i && i <= 23 {
assert!(pstate.state == HTTP_STATE_VERSION_MIN);
} else if i == 24 {
assert!(pstate.state == HTTP_STATE_FIELD_START);
}
}
}
#[test]
fn test_http_request_field() {
let mut pstate = ProtocolState::new();
let req = "POST /index.php HTTP/2.0\r\n".as_bytes();
http_parse(&mut pstate, req);
assert!(pstate.state == HTTP_STATE_FIELD_START);
let field = b"Content-Length";
http_parse(&mut pstate, field);
assert!(pstate.state == HTTP_STATE_FIELD_NAME);
let dot = b": ";
http_parse(&mut pstate, dot);
assert!(pstate.state == HTTP_STATE_FIELD_VALUE);
let value = b": 0\r\n";
http_parse(&mut pstate, value);
assert!(pstate.state == HTTP_STATE_FIELD_START);
}
#[test]
fn test_http_request_no_field() {
let mut pstate = ProtocolState::new();
let req = "POST /index.php HTTP/2.0\r\n".as_bytes();
http_parse(&mut pstate, req);
assert!(pstate.state == HTTP_STATE_FIELD_START);
let crlf = "\r\n".as_bytes();
http_parse(&mut pstate, crlf);
assert!(pstate.state == HTTP_STATE_CONTENT);
}

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
use lazy_static::lazy_static;
use log::*;
use pnet::packet::ip::IpNextHeaderProtocols;
use std::collections::HashMap;
use std::sync::Mutex;
use crate::client::ClientInfo;
use crate::smack::{Smack, SmackFlags, BASE_STATE, NO_MATCH, SMACK_CASE_SENSITIVE};
use crate::Masscanned;
mod http;
use http::HTTP_VERBS;
mod stun;
use stun::{STUN_PATTERN_CHANGE_REQUEST, STUN_PATTERN_EMPTY, STUN_PATTERN_MAGIC};
mod ssh;
use ssh::SSH_PATTERN_CLIENT_PROTOCOL;
const PROTO_HTTP: usize = 1;
const PROTO_STUN: usize = 2;
const PROTO_SSH: usize = 3;
struct TCPControlBlock {
proto_state: usize,
}
lazy_static! {
static ref PROTO_SMACK: Smack = proto_init();
static ref CONTABLE: Mutex<HashMap<u32, TCPControlBlock>> = Mutex::new(HashMap::new());
}
fn proto_init() -> Smack {
let mut smack = Smack::new("proto".to_string(), SMACK_CASE_SENSITIVE);
/* HTTP markers */
for (_, v) in HTTP_VERBS.iter().enumerate() {
smack.add_pattern(
format!("{} /", v).as_bytes(),
PROTO_HTTP,
SmackFlags::ANCHOR_BEGIN,
);
}
smack.add_pattern(
STUN_PATTERN_MAGIC,
PROTO_STUN,
SmackFlags::ANCHOR_BEGIN | SmackFlags::WILDCARDS,
);
smack.add_pattern(
STUN_PATTERN_EMPTY,
PROTO_STUN,
SmackFlags::ANCHOR_BEGIN | SmackFlags::ANCHOR_END | SmackFlags::WILDCARDS,
);
smack.add_pattern(
STUN_PATTERN_CHANGE_REQUEST,
PROTO_STUN,
SmackFlags::ANCHOR_BEGIN | SmackFlags::ANCHOR_END | SmackFlags::WILDCARDS,
);
smack.add_pattern(
SSH_PATTERN_CLIENT_PROTOCOL,
PROTO_SSH,
SmackFlags::ANCHOR_BEGIN,
);
smack.compile();
smack
}
pub fn repl<'a>(
data: &'a [u8],
masscanned: &Masscanned,
mut client_info: &mut ClientInfo,
) -> Option<Vec<u8>> {
debug!("packet payload: {:?}", data);
let mut id;
if client_info.transport == Some(IpNextHeaderProtocols::Tcp) && client_info.cookie == None {
error!("Unexpected empty cookie");
return None;
} else if client_info.cookie != None {
/* proto over TCP */
let cookie = client_info.cookie.unwrap();
let mut ct = CONTABLE.lock().unwrap();
if !ct.contains_key(&cookie) {
ct.insert(
cookie,
TCPControlBlock {
proto_state: BASE_STATE,
},
);
}
let mut i = 0;
let mut tcb = ct.get_mut(&cookie).unwrap();
let mut state = tcb.proto_state;
id = PROTO_SMACK.search_next(&mut state, &data.to_vec(), &mut i);
tcb.proto_state = state;
} else {
/* proto over else (e.g., UDP) */
let mut i = 0;
let mut state = BASE_STATE;
id = PROTO_SMACK.search_next(&mut state, &data.to_vec(), &mut i);
/* because we are not over TCP, we can afford to assume end of pattern */
if id == NO_MATCH {
id = PROTO_SMACK.search_next_end(&mut state);
}
}
/* proto over else (e.g., UDP) */
if id == PROTO_HTTP {
return http::repl(data, masscanned, client_info);
} else if id == PROTO_STUN {
return stun::repl(data, masscanned, &mut client_info);
} else if id == PROTO_SSH {
return ssh::repl(data, masscanned, &mut client_info);
} else {
debug!("id: {}", id);
}
None
}
#[cfg(test)]
mod tests {
use super::*;
use std::collections::HashSet;
use std::net::{IpAddr, Ipv4Addr};
use std::str::FromStr;
use pnet::util::MacAddr;
#[test]
fn test_proto_dispatch_stun() {
let mut client_info = ClientInfo::new();
let test_ip_addr = Ipv4Addr::new(3, 2, 1, 0);
client_info.ip.src = Some(IpAddr::V4(test_ip_addr));
client_info.port.src = Some(65000);
let masscanned_ip_addr = Ipv4Addr::new(0, 1, 2, 3);
let mut ips = HashSet::new();
ips.insert(IpAddr::V4(masscanned_ip_addr));
/* Construct masscanned context object */
let masscanned = Masscanned {
synack_key: [0, 0],
mac: MacAddr::from_str("00:11:22:33:44:55").expect("error parsing MAC address"),
iface: None,
ip_addresses: Some(&ips),
};
/***** TEST STUN - MAGIC *****/
/* test payload is:
* - bind request: 0x0001
* - length: 0x0000
* - magic cookie: 0x2112a442
* - message: empty
*/
let payload =
b"\x00\x01\x00\x00\x21\x12\xa4\x42\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00";
let _stun_resp = if let Some(r) = repl(payload, &masscanned, &mut client_info) {
r
} else {
panic!("expected an answer, got nothing");
};
/***** TEST STUN - EMPTY *****/
/* test payload is:
* - bind request: 0x0001
* - length: 0x0000
* - magic cookie: 0xaabbccdd
* - message: empty
*/
let payload =
b"\x00\x01\x00\x00\xaa\xbb\xcc\xdd\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00";
let _stun_resp = if let Some(r) = repl(payload, &masscanned, &mut client_info) {
r
} else {
panic!("expected an answer, got nothing");
};
/***** TEST STUN - CHANGE_REQUEST *****/
/* test payload is:
* - bind request: 0x0001
* - length: 0x0008
* - message: change request
*/
let payload =
b"\x00\x01\x00\x08\x01\xdb\xd4]4\x9f\xe2RQ\x19\x05,\x93\x14f4\x00\x03\x00\x04\x00\x00\x00\x00";
let _stun_resp = if let Some(r) = repl(payload, &masscanned, &mut client_info) {
r
} else {
panic!("expected an answer, got nothing");
};
}
#[test]
fn test_proto_dispatch_ssh() {
let mut client_info = ClientInfo::new();
let test_ip_addr = Ipv4Addr::new(3, 2, 1, 0);
client_info.ip.src = Some(IpAddr::V4(test_ip_addr));
client_info.port.src = Some(65000);
let masscanned_ip_addr = Ipv4Addr::new(0, 1, 2, 3);
let mut ips = HashSet::new();
ips.insert(IpAddr::V4(masscanned_ip_addr));
/* Construct masscanned context object */
let masscanned = Masscanned {
synack_key: [0, 0],
mac: MacAddr::from_str("00:11:22:33:44:55").expect("error parsing MAC address"),
iface: None,
ip_addresses: Some(&ips),
};
/***** TEST SSH *****/
let payloads = [
"SSH-2.0-PUTTY",
"SSH-2.0-Go",
"SSH-2.0-libssh2_1.4.3",
"SSH-2.0-PuTTY",
"SSH-2.0-AsyncSSH_2.1.0",
"SSH-2.0-libssh2_1.9.0",
"SSH-2.0-libssh2_1.7.0",
"SSH-2.0-8.35 FlowSsh: FlowSshNet_SftpStress54.38.116.473",
"SSH-2.0-libssh_0.9.5",
"SSH-2.0-OpenSSH_6.7p1 Raspbian-5+deb8u3",
];
for payload in payloads.iter() {
let _ssh_resp = if let Some(r) = repl(payload.as_bytes(), &masscanned, &mut client_info)
{
r
} else {
panic!("expected an answer, got nothing");
};
}
}
}

36
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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
use log::*;
use std::str;
use crate::client::ClientInfo;
use crate::Masscanned;
pub const SSH_PATTERN_CLIENT_PROTOCOL: &[u8; 7] = b"SSH-2.0";
pub fn repl<'a>(
data: &'a [u8],
_masscanned: &Masscanned,
mut _client_info: &mut ClientInfo,
) -> Option<Vec<u8>> {
debug!("receiving SSH data");
let repl_data = b"SSH-2.0-1\r\n".to_vec();
debug!("sending SSH answer");
warn!("SSH server banner to {}", str::from_utf8(&data).unwrap().trim_end());
return Some(repl_data);
}

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// This file is part of masscanned.
// Copyright 2021 - The IVRE project
//
// Masscanned is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Masscanned is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
use log::*;
use std::convert::TryInto;
use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
use byteorder::{BigEndian, ByteOrder};
use std::io;
use crate::client::ClientInfo;
use crate::Masscanned;
/* RFC 5389: The magic cookie field MUST contain the fixed value 0x2112A442 in
network byte order. */
/* Note: disabled for now due to a « bug » in smack */
pub const STUN_PATTERN_MAGIC: &[u8; 8] = b"\x00\x01**\x21\x12\xa4\x42";
pub const STUN_PATTERN_EMPTY: &[u8; 20] = b"\x00\x01\x00\x00****************";
/* RFC 3489: support without cookie */
pub const STUN_PATTERN_CHANGE_REQUEST: &[u8; 28] =
b"\x00\x01\x00\x08****************\x00\x03\x00\x04\x00\x00\x00*";
pub const _STUN_MAGIC: u32 = 0x2112a442;
pub const STUN_CLASS_REQUEST: u8 = 0b00;
#[allow(dead_code)]
pub const STUN_CLASS_INDICATE: u8 = 0b01;
pub const STUN_CLASS_SUCCESS_RESPONSE: u8 = 0b10;
#[allow(dead_code)]
pub const STUN_CLASS_FAILURE_RESPONSE: u8 = 0b11;
pub const STUN_ATTR_MAPPED_ADDRESS: u16 = 0x0001;
pub const STUN_ATTR_CHANGE_REQUEST: u16 = 0x0003;
pub const STUN_METHOD_BINDING: u16 = 0x001;
pub const STUN_PROTOCOL_FAMILY_IPV4: u8 = 0x01;
pub const STUN_PROTOCOL_FAMILY_IPV6: u8 = 0x02;
pub const STUN_CHANGE_REQUEST_MASK_IP: u32 = 0x00000004;
pub const STUN_CHANGE_REQUEST_MASK_PORT: u32 = 0x00000002;
struct StunGenericAttribute {
type_: u16,
length: u16,
data: Vec<u8>,
}
impl StunGenericAttribute {
#[allow(dead_code)]
fn new(data: &[u8]) -> Result<Self, io::Error> {
if data.len() < 4 {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"not enough data",
));
}
let type_ = BigEndian::read_u16(&data[0..2]);
let length = BigEndian::read_u16(&data[2..4]);
if data.len() < 4 + length as usize {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"not enough data",
));
}
let data = data[4..4 + length as usize].to_vec();
Ok(StunGenericAttribute {
type_,
length,
data,
})
}
}
impl Into<Vec<u8>> for &StunGenericAttribute {
fn into(self) -> Vec<u8> {
let mut v = Vec::<u8>::new();
v.append(&mut self.type_.to_be_bytes().to_vec());
v.append(&mut self.length.to_be_bytes().to_vec());
v.append(&mut self.data.clone());
v
}
}
struct StunChangeRequestAttribute {
type_: u16,
length: u16,
change_ip: bool,
change_port: bool,
}
impl Into<Vec<u8>> for &StunChangeRequestAttribute {
fn into(self) -> Vec<u8> {
let mut v = Vec::<u8>::new();
v.append(&mut self.type_.to_be_bytes().to_vec());
v.append(&mut self.length.to_be_bytes().to_vec());
let mut flags: u32 = 0;
if self.change_ip {
flags |= STUN_CHANGE_REQUEST_MASK_IP;
}
if self.change_port {
flags |= STUN_CHANGE_REQUEST_MASK_PORT;
}
v.append(&mut flags.to_be_bytes().to_vec());
v
}
}
struct StunMappedAddressAttribute {
type_: u16,
length: u16,
reserved: u8,
protocol_family: u8,
port: u16,
ip: IpAddr,
}
impl StunMappedAddressAttribute {
fn new(ip: IpAddr, port: u16) -> Self {
StunMappedAddressAttribute {
type_: STUN_ATTR_MAPPED_ADDRESS,
length: 4 + if let IpAddr::V4(_) = ip { 4 } else { 16 },
reserved: 0,
protocol_family: if let IpAddr::V4(_) = ip {
STUN_PROTOCOL_FAMILY_IPV4
} else {
STUN_PROTOCOL_FAMILY_IPV6
},
port: port,
ip: ip,
}
}
}
impl Into<Vec<u8>> for &StunMappedAddressAttribute {
fn into(self) -> Vec<u8> {
let mut v = Vec::<u8>::new();
v.append(&mut self.type_.to_be_bytes().to_vec());
v.append(&mut self.length.to_be_bytes().to_vec());
v.push(self.reserved);
v.push(self.protocol_family);
v.push(((self.port & 0xFF00) >> 8).try_into().unwrap());
v.push((self.port & 0x00FF).try_into().unwrap());
let mut ip = if let IpAddr::V4(ip) = self.ip {
ip.octets().to_vec()
} else if let IpAddr::V6(ip) = self.ip {
ip.octets().to_vec()
} else {
Vec::new()
};
v.append(&mut ip);
v
}
}
enum StunAttribute {
MappedAddress(StunMappedAddressAttribute),
ChangeRequest(StunChangeRequestAttribute),
Generic(StunGenericAttribute),
}
impl StunAttribute {
fn len(&self) -> u16 {
match self {
StunAttribute::MappedAddress(s) => s.length,
StunAttribute::ChangeRequest(s) => s.length,
StunAttribute::Generic(s) => s.length,
}
}
#[allow(dead_code)]
fn type_(&self) -> u16 {
match self {
StunAttribute::MappedAddress(s) => s.type_,
StunAttribute::ChangeRequest(s) => s.type_,
StunAttribute::Generic(s) => s.type_,
}
}
}
impl From<Vec<u8>> for StunAttribute {
fn from(v: Vec<u8>) -> Self {
if v.len() < 4 {
panic!("not enough data");
}
let type_ = BigEndian::read_u16(&v[0..2]);
let length = BigEndian::read_u16(&v[2..4]);
if v.len() < 4 + length as usize {
panic!("not enough data");
}
match type_ {
STUN_ATTR_MAPPED_ADDRESS => {
let reserved = v[4];
let protocol_family = v[5];
let port = BigEndian::read_u16(&v[6..8]);
StunAttribute::MappedAddress(StunMappedAddressAttribute {
type_,
length,
reserved,
protocol_family,
port,
ip: if protocol_family == STUN_PROTOCOL_FAMILY_IPV4 {
IpAddr::V4(Ipv4Addr::new(v[8], v[9], v[10], v[11]))
} else if protocol_family == STUN_PROTOCOL_FAMILY_IPV6 {
IpAddr::V6(Ipv6Addr::new(
BigEndian::read_u16(&v[8..10]),
BigEndian::read_u16(&v[10..12]),
BigEndian::read_u16(&v[12..14]),
BigEndian::read_u16(&v[14..16]),
BigEndian::read_u16(&v[16..18]),
BigEndian::read_u16(&v[18..20]),
BigEndian::read_u16(&v[20..22]),
BigEndian::read_u16(&v[22..24]),
))
} else {
panic!("unexpected protocol family");
},
})
}
STUN_ATTR_CHANGE_REQUEST => StunAttribute::ChangeRequest(StunChangeRequestAttribute {
type_,
length,
change_ip: (BigEndian::read_u32(&v[4..8]) & STUN_CHANGE_REQUEST_MASK_IP)
== STUN_CHANGE_REQUEST_MASK_IP,
change_port: (BigEndian::read_u32(&v[4..8]) & STUN_CHANGE_REQUEST_MASK_PORT)
== STUN_CHANGE_REQUEST_MASK_PORT,
}),
_ => StunAttribute::Generic(StunGenericAttribute {
type_,
length,
data: v[4..].to_vec(),
}),
}
}
}
impl Into<Vec<u8>> for &StunAttribute {
fn into(self) -> Vec<u8> {
match self {
StunAttribute::Generic(s) => s.into(),
StunAttribute::MappedAddress(s) => s.into(),
StunAttribute::ChangeRequest(s) => s.into(),
}
}
}
/*
struct StunPacket {
class: u8,
method: u16,
length: u16,
magic: u32,
id: u128,
data: Vec<u8>,
attributes: Vec<StunAttribute>,
}
impl StunPacket {
fn new(data: &[u8]) -> Result<Self, io::Error> {
if data.len() < 20 {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"not enough data",
));
}
let class: u8 = ((data[0] & 0x01) << 1) | ((data[1] & 0x10) >> 4);
let method: u16 = (((data[0] & 0b00111110) << 7) as u16) | ((data[1] & 0b11101111) as u16);
let length: u16 = BigEndian::read_u16(&data[2..4]);
let magic: u32 = BigEndian::read_u32(&data[4..8]);
let id: u128 = ((BigEndian::read_u64(&data[8..16]) as u128) << 32)
| (BigEndian::read_u32(&data[16..20]) as u128);
if data.len() < 20 + length as usize {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"not enough data",
));
}
let data: Vec<u8> = data[20..(20 + length) as usize].to_vec();
let mut stun = StunPacket {
class,
method,
length,
magic,
id,
data,
attributes: Vec::<StunAttribute>::new(),
};
stun.attributes = stun.get_attributes();
Ok(stun)
}
fn empty() -> Self {
StunPacket {
class: 0,
method: 0,
length: 0,
magic: 0,
id: 0,
data: Vec::new(),
attributes: Vec::new(),
}
}
fn get_attributes(&self) -> Vec<StunAttribute> {
let mut i = 0;
let mut attributes = Vec::<StunAttribute>::new();
while i + 4 < self.data.len() {
let attr = StunAttribute::from(self.data[i..].to_vec());
i += 4 + attr.len() as usize;
attributes.push(attr);
}
attributes
}
fn set_length(&mut self) {
self.length = 0;
for attr in &self.attributes {
self.length += 4 + attr.len();
}
}
}
impl Into<Vec<u8>> for StunPacket {
fn into(self) -> Vec<u8> {
let mut v = Vec::<u8>::new();
// first cocktail with class and method bits
v.push(
TryInto::<u8>::try_into((self.method >> 7) & 0b00111110).unwrap()
| TryInto::<u8>::try_into((self.class & 0b10) >> 1).unwrap(),
);
// second cocktail with class and method bits
v.push(
TryInto::<u8>::try_into((self.method & 0b01110000) << 1).unwrap()
| TryInto::<u8>::try_into((self.class & 0b01) << 4).unwrap()
| TryInto::<u8>::try_into(self.method & 0b00001111).unwrap(),
);
v.append(&mut self.length.to_be_bytes().to_vec());
v.append(&mut self.magic.to_be_bytes().to_vec());
v.append(&mut self.id.to_be_bytes()[4..].to_vec());
for attr in &self.attributes {
v.append(&mut attr.into());
}
v
}
}
*/
struct StunPacket {
class: u8,
method: u16,
length: u16,
id: u128,
data: Vec<u8>,
attributes: Vec<StunAttribute>,
}
impl StunPacket {
fn new(data: &[u8]) -> Result<Self, io::Error> {
if data.len() < 20 {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"not enough data",
));
}
let class: u8 = ((data[0] & 0x01) << 1) | ((data[1] & 0x10) >> 4);
let method: u16 = (((data[0] & 0b00111110) << 7) as u16) | ((data[1] & 0b11101111) as u16);
let length: u16 = BigEndian::read_u16(&data[2..4]);
let id: u128 = BigEndian::read_u128(&data[4..20]);
if data.len() < 20 + length as usize {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"not enough data",
));
}
let data: Vec<u8> = data[20..(20 + length) as usize].to_vec();
let mut stun = StunPacket {
class,
method,
length,
id,
data,
attributes: Vec::<StunAttribute>::new(),
};
stun.attributes = stun.get_attributes();
Ok(stun)
}
fn empty() -> Self {
StunPacket {
class: 0,
method: 0,
length: 0,
id: 0,
data: Vec::new(),
attributes: Vec::new(),
}
}
fn get_attributes(&self) -> Vec<StunAttribute> {
let mut i = 0;
let mut attributes = Vec::<StunAttribute>::new();
while i + 4 < self.data.len() {
let attr = StunAttribute::from(self.data[i..].to_vec());
i += 4 + attr.len() as usize;
attributes.push(attr);
}
attributes
}
fn set_length(&mut self) {
self.length = 0;
for attr in &self.attributes {
self.length += 4 + attr.len();
}
}
}
impl Into<Vec<u8>> for StunPacket {
fn into(self) -> Vec<u8> {
let mut v = Vec::<u8>::new();
// first cocktail with class and method bits
v.push(
TryInto::<u8>::try_into((self.method >> 7) & 0b00111110).unwrap()
| TryInto::<u8>::try_into((self.class & 0b10) >> 1).unwrap(),
);
// second cocktail with class and method bits
v.push(
TryInto::<u8>::try_into((self.method & 0b01110000) << 1).unwrap()
| TryInto::<u8>::try_into((self.class & 0b01) << 4).unwrap()
| TryInto::<u8>::try_into(self.method & 0b00001111).unwrap(),
);
v.append(&mut self.length.to_be_bytes().to_vec());
v.append(&mut self.id.to_be_bytes().to_vec());
for attr in &self.attributes {
v.append(&mut attr.into());
}
v
}
}
/*
pub fn repl<'a>(
data: &'a [u8],
_masscanned: &Masscanned,
client_info: ClientInfo,
) -> Option<Vec<u8>> {
debug!("receiving STUN data");
let stun_req: StunPacket = if let Ok(s) = StunPacket::new(&data) {
s
} else {
return None;
};
if stun_req.class != STUN_CLASS_REQUEST {
info!(
"STUN packet not handled (class unknown: 0b{:b})",
stun_req.class
);
return None;
}
if stun_req.method != STUN_METHOD_BINDING {
info!(
"STUN packet not handled (method unknown: 0x{:03x})",
stun_req.method
);
return None;
}
/*
* To be compatible with RFC3489: ignore magic
if stun_req.magic != STUN_MAGIC {
info!(
"STUN packet not handled (magic unknown: 0x{:04x})",
stun_req.magic
);
return None;
}
*/
if client_info.ip.src == None {
error!("STUN packet not handled (expected client ip address not found)");
return None;
}
if client_info.port.src == None {
error!("STUN packet not handled (expected client port address not found)");
return None;
}
let mut stun_resp: StunPacket = StunPacket::empty();
stun_resp.class = STUN_CLASS_SUCCESS_RESPONSE;
stun_resp.method = STUN_METHOD_BINDING;
stun_resp.id = stun_req.id;
stun_resp.attributes = Vec::<StunAttribute>::new();
stun_resp.attributes.push(StunAttribute::MappedAddress(
StunMappedAddressAttribute::new(client_info.ip.src.unwrap(), client_info.port.src.unwrap()),
));
stun_resp.set_length();
return Some(stun_resp.into());
}
*/
pub fn repl<'a>(
data: &'a [u8],
_masscanned: &Masscanned,
mut client_info: &mut ClientInfo,
) -> Option<Vec<u8>> {
debug!("receiving STUN data");
let stun_req: StunPacket = if let Ok(s) = StunPacket::new(&data) {
s
} else {
return None;
};
if stun_req.class != STUN_CLASS_REQUEST {
info!(
"STUN packet not handled (class unknown: 0b{:b})",
stun_req.class
);
return None;
}
if stun_req.method != STUN_METHOD_BINDING {
info!(
"STUN packet not handled (method unknown: 0x{:03x})",
stun_req.method
);
return None;
}
if client_info.ip.src == None {
error!("STUN packet not handled (expected client ip address not found)");
return None;
}
if client_info.port.src == None {
error!("STUN packet not handled (expected client port address not found)");
return None;
}
/* Change client_info if CHANGE_REQUEST was set by client */
for attr in &stun_req.attributes {
if let StunAttribute::ChangeRequest(a) = attr {
if a.change_ip {}
if a.change_port {
client_info.port.dst = Some(client_info.port.dst.unwrap().wrapping_add(1));
}
}
}
let mut stun_resp: StunPacket = StunPacket::empty();
stun_resp.class = STUN_CLASS_SUCCESS_RESPONSE;
stun_resp.method = STUN_METHOD_BINDING;
stun_resp.id = stun_req.id;
stun_resp.attributes = Vec::<StunAttribute>::new();
stun_resp.attributes.push(StunAttribute::MappedAddress(
StunMappedAddressAttribute::new(client_info.ip.src.unwrap(), client_info.port.src.unwrap()),
));
stun_resp.set_length();
debug!("sending STUN answer");
return Some(stun_resp.into());
}
#[cfg(test)]
mod tests {
use super::*;
use std::collections::HashSet;
use std::str::FromStr;
use pnet::util::MacAddr;
#[test]
fn test_proto_stun_ipv4() {
/* test payload is:
* - bind request: 0x0001
* - length: 0x0000
* - magic cookie: 0x2112a442
* - id: 0xaabbccddeeffffeeddccbbaa
* - message: empty
*/
let payload =
b"\x00\x01\x00\x00\x21\x12\xa4\x42\xaa\xbb\xcc\xdd\xee\xff\xff\xee\xdd\xcc\xbb\xaa";
let mut client_info = ClientInfo::new();
let test_ip_addr = Ipv4Addr::new(3, 2, 1, 0);
let masscanned_ip_addr = Ipv4Addr::new(0, 1, 2, 3);
client_info.ip.src = Some(IpAddr::V4(test_ip_addr));
client_info.ip.dst = Some(IpAddr::V4(masscanned_ip_addr));
client_info.port.src = Some(55000);
client_info.port.dst = Some(65000);
let mut ips = HashSet::new();
ips.insert(IpAddr::V4(masscanned_ip_addr));
/* Construct masscanned context object */
let masscanned = Masscanned {
synack_key: [0, 0],
mac: MacAddr::from_str("00:11:22:33:44:55").expect("error parsing MAC address"),
iface: None,
ip_addresses: Some(&ips),
};
let payload_resp = if let Some(r) = repl(payload, &masscanned, &mut client_info) {
r
} else {
panic!("expected an answer, got None");
};
let stun_resp = StunPacket::new(&payload_resp).unwrap();
assert!(stun_resp.class == STUN_CLASS_SUCCESS_RESPONSE);
assert!(stun_resp.method == STUN_METHOD_BINDING);
assert!(
stun_resp.id
== BigEndian::read_u128(
b"\x21\x12\xa4\x42\xaa\xbb\xcc\xdd\xee\xff\xff\xee\xdd\xcc\xbb\xaa"
)
);
assert!(stun_resp.attributes.len() == 1);
if let StunAttribute::MappedAddress(attr) = &stun_resp.attributes[0] {
assert!(attr.type_ == STUN_ATTR_MAPPED_ADDRESS);
assert!(attr.length == 8);
assert!(attr.reserved == 0);
assert!(attr.protocol_family == STUN_PROTOCOL_FAMILY_IPV4);
assert!(attr.port == client_info.port.src.unwrap());
assert!(attr.ip == client_info.ip.src.unwrap());
} else {
panic!("expected MappedAddress attribute");
}
/* Check that client_info was not modified */
assert!(client_info.ip.src == Some(IpAddr::V4(test_ip_addr)));
assert!(client_info.ip.dst == Some(IpAddr::V4(masscanned_ip_addr)));
assert!(client_info.port.src == Some(55000));
assert!(client_info.port.dst == Some(65000));
}
#[test]
fn test_proto_stun_ipv6() {
/* test payload is:
* - bind request: 0x0001
* - length: 0x0000
* - magic cookie: 0x2112a442
* - id: 0xaabbccddeeffffeeddccbbaa
* - message: empty
*/
let payload =
b"\x00\x01\x00\x00\x21\x12\xa4\x42\xaa\xbb\xcc\xdd\xee\xff\xff\xee\xdd\xcc\xbb\xaa";
let mut client_info = ClientInfo::new();
let test_ip_addr = Ipv6Addr::new(
0x7777, 0x6666, 0x5555, 0x4444, 0x3333, 0x2222, 0x1111, 0x0000,
);
let masscanned_ip_addr = Ipv6Addr::new(
0x0000, 0x1111, 0x2222, 0x3333, 0x4444, 0x5555, 0x6666, 0x7777,
);
let mut ips = HashSet::new();
ips.insert(IpAddr::V6(masscanned_ip_addr));
/* Construct masscanned context object */
let masscanned = Masscanned {
synack_key: [0, 0],
mac: MacAddr::from_str("00:11:22:33:44:55").expect("error parsing MAC address"),
iface: None,
ip_addresses: Some(&ips),
};
client_info.ip.src = Some(IpAddr::V6(test_ip_addr));
client_info.ip.dst = Some(IpAddr::V6(masscanned_ip_addr));
client_info.port.src = Some(55000);
client_info.port.dst = Some(65000);
let payload_resp = if let Some(r) = repl(payload, &masscanned, &mut client_info) {
r
} else {
panic!("expected an answer, got None");
};
let stun_resp = StunPacket::new(&payload_resp).unwrap();
assert!(stun_resp.class == STUN_CLASS_SUCCESS_RESPONSE);
assert!(stun_resp.method == STUN_METHOD_BINDING);
assert!(
stun_resp.id
== BigEndian::read_u128(
b"\x21\x12\xa4\x42\xaa\xbb\xcc\xdd\xee\xff\xff\xee\xdd\xcc\xbb\xaa"
)
);
assert!(stun_resp.attributes.len() == 1);
if let StunAttribute::MappedAddress(attr) = &stun_resp.attributes[0] {
assert!(attr.type_ == STUN_ATTR_MAPPED_ADDRESS);
assert!(attr.length == 20);
assert!(attr.reserved == 0);
assert!(attr.protocol_family == STUN_PROTOCOL_FAMILY_IPV6);
assert!(attr.port == client_info.port.src.unwrap());
assert!(attr.ip == client_info.ip.src.unwrap());
} else {
panic!("expected MappedAddress attribute");
}
/* Check that client_info was not modified */
assert!(client_info.ip.src == Some(IpAddr::V6(test_ip_addr)));
assert!(client_info.ip.dst == Some(IpAddr::V6(masscanned_ip_addr)));
assert!(client_info.port.src == Some(55000));
assert!(client_info.port.dst == Some(65000));
}
#[test]
fn test_change_request_port() {
let payload = b"\x00\x01\x00\x08\x03\xa3\xb9FM\xd8\xebu\xe1\x94\x81GB\x93\x84\\\x00\x03\x00\x04\x00\x00\x00\x02";
let mut client_info = ClientInfo::new();
let test_ip_addr = Ipv4Addr::new(3, 2, 1, 0);
let masscanned_ip_addr = Ipv4Addr::new(0, 1, 2, 3);
let mut ips = HashSet::new();
ips.insert(IpAddr::V4(masscanned_ip_addr));
/* Construct masscanned context object */
let masscanned = Masscanned {
synack_key: [0, 0],
mac: MacAddr::from_str("00:11:22:33:44:55").expect("error parsing MAC address"),
iface: None,
ip_addresses: Some(&ips),
};
client_info.ip.src = Some(IpAddr::V4(test_ip_addr));
client_info.ip.dst = Some(IpAddr::V4(masscanned_ip_addr));
client_info.port.src = Some(55000);
client_info.port.dst = Some(65000);
let payload_resp = if let Some(r) = repl(payload, &masscanned, &mut client_info) {
r
} else {
panic!("expected an answer, got None");
};
let stun_resp = StunPacket::new(&payload_resp).unwrap();
assert!(stun_resp.class == STUN_CLASS_SUCCESS_RESPONSE);
assert!(stun_resp.method == STUN_METHOD_BINDING);
assert!(
stun_resp.id
== BigEndian::read_u128(b"\x03\xa3\xb9FM\xd8\xebu\xe1\x94\x81GB\x93\x84\\")
);
assert!(stun_resp.attributes.len() == 1);
if let StunAttribute::MappedAddress(attr) = &stun_resp.attributes[0] {
assert!(attr.type_ == STUN_ATTR_MAPPED_ADDRESS);
assert!(attr.length == 8);
assert!(attr.reserved == 0);
assert!(attr.protocol_family == STUN_PROTOCOL_FAMILY_IPV4);
assert!(attr.port == client_info.port.src.unwrap());
assert!(attr.ip == client_info.ip.src.unwrap());
} else {
panic!("expected MappedAddress attribute");
}
/* Check that client_info was not modified */
assert!(client_info.ip.src == Some(IpAddr::V4(test_ip_addr)));
assert!(client_info.ip.dst == Some(IpAddr::V4(masscanned_ip_addr)));
assert!(client_info.port.src == Some(55000));
assert!(client_info.port.dst == Some(65001));
}
#[test]
fn test_change_request_port_overflow() {
let payload = b"\x00\x01\x00\x08\x03\xa3\xb9FM\xd8\xebu\xe1\x94\x81GB\x93\x84\\\x00\x03\x00\x04\x00\x00\x00\x02";
let mut client_info = ClientInfo::new();
let test_ip_addr = Ipv4Addr::new(3, 2, 1, 0);
let masscanned_ip_addr = Ipv4Addr::new(0, 1, 2, 3);
let mut ips = HashSet::new();
ips.insert(IpAddr::V4(masscanned_ip_addr));
/* Construct masscanned context object */
let masscanned = Masscanned {
synack_key: [0, 0],
mac: MacAddr::from_str("00:11:22:33:44:55").expect("error parsing MAC address"),
iface: None,
ip_addresses: Some(&ips),
};
client_info.ip.src = Some(IpAddr::V4(test_ip_addr));
client_info.ip.dst = Some(IpAddr::V4(masscanned_ip_addr));
client_info.port.src = Some(55000);
client_info.port.dst = Some(65535);
let payload_resp = if let Some(r) = repl(payload, &masscanned, &mut client_info) {
r
} else {
panic!("expected an answer, got None");
};
let stun_resp = StunPacket::new(&payload_resp).unwrap();
assert!(stun_resp.class == STUN_CLASS_SUCCESS_RESPONSE);
assert!(stun_resp.method == STUN_METHOD_BINDING);
assert!(
stun_resp.id
== BigEndian::read_u128(b"\x03\xa3\xb9FM\xd8\xebu\xe1\x94\x81GB\x93\x84\\")
);
assert!(stun_resp.attributes.len() == 1);
if let StunAttribute::MappedAddress(attr) = &stun_resp.attributes[0] {
assert!(attr.type_ == STUN_ATTR_MAPPED_ADDRESS);
assert!(attr.length == 8);
assert!(attr.reserved == 0);
assert!(attr.protocol_family == STUN_PROTOCOL_FAMILY_IPV4);
assert!(attr.port == client_info.port.src.unwrap());
assert!(attr.ip == client_info.ip.src.unwrap());
} else {
panic!("expected MappedAddress attribute");
}
/* Check that client_info was not modified */
assert!(client_info.ip.src == Some(IpAddr::V4(test_ip_addr)));
assert!(client_info.ip.dst == Some(IpAddr::V4(masscanned_ip_addr)));
assert!(client_info.port.src == Some(55000));
assert!(client_info.port.dst == Some(0));
}
}

9
src/smack/mod.rs Normal file
View file

@ -0,0 +1,9 @@
mod smack;
mod smack_constants;
mod smack_pattern;
mod smack_queue;
mod smack_utils;
pub use smack::Smack;
pub use smack_constants::*;
pub use smack_utils::SmackFlags;

758
src/smack/smack.rs Normal file
View file

@ -0,0 +1,758 @@
use std::mem;
use crate::smack::smack_constants::*;
use crate::smack::smack_pattern::SmackPattern;
use crate::smack::smack_queue::SmackQueue;
use crate::smack::smack_utils::{row_shift_from_symbol_count, SmackFlags};
struct SmackRow {
next_state: Vec<usize>,
fail: usize,
}
impl SmackRow {
fn new() -> Self {
SmackRow {
next_state: vec![BASE_STATE; ALPHABET_SIZE],
fail: 0,
}
}
}
struct SmackMatches {
m_ids: Vec<usize>,
m_count: usize,
}
impl SmackMatches {
fn new() -> Self {
SmackMatches {
m_ids: Vec::new(),
m_count: 0,
}
}
fn copy_matches(&mut self, new_ids: Vec<usize>) {
for id in &new_ids {
if !self.m_ids.contains(id) {
self.m_count += 1;
self.m_ids.push(*id)
}
}
}
}
pub struct Smack {
_name: String,
is_nocase: bool,
is_anchor_begin: bool,
is_anchor_end: bool,
m_pattern_list: Vec<SmackPattern>,
m_pattern_count: usize,
m_state_table: Vec<SmackRow>,
m_state_count: usize,
m_state_max: usize,
m_match: Vec<SmackMatches>,
m_match_limit: usize,
symbol_to_char: Vec<usize>,
char_to_symbol: Vec<u8>,
symbol_count: usize,
row_shift: usize,
transitions: Vec<usize>,
}
fn make_copy_of_pattern(pattern: &[u8], is_nocase: bool) -> Vec<u8> {
let mut p = pattern.clone().to_vec();
for i in 0..p.len() {
if is_nocase {
p[i] = p[i].to_ascii_lowercase();
}
}
p
}
impl Smack {
pub fn new(name: String, nocase: bool) -> Self {
Smack {
_name: name,
is_nocase: nocase,
is_anchor_begin: false,
is_anchor_end: false,
m_pattern_list: Vec::new(),
m_pattern_count: 0,
m_state_table: Vec::new(),
m_state_count: 0,
m_state_max: 0,
m_match: Vec::new(),
m_match_limit: 0,
symbol_to_char: vec![0; ALPHABET_SIZE],
char_to_symbol: vec![0; ALPHABET_SIZE],
symbol_count: 0,
row_shift: 0,
transitions: Vec::new(),
}
}
fn create_intermediate_table(&mut self, size: usize) {
for _ in 0..size {
self.m_state_table.push(SmackRow::new());
}
}
fn create_matches_table(&mut self, size: usize) {
for _ in 0..size {
self.m_match.push(SmackMatches::new());
}
}
fn add_symbol(&mut self, c: usize) -> usize {
for i in 1..self.symbol_count + 1 {
if self.symbol_to_char[i] == c {
return i;
}
}
self.symbol_count += 1;
let symbol = self.symbol_count;
self.symbol_to_char[symbol] = c;
self.char_to_symbol[c] = symbol.to_le_bytes()[0];
symbol
}
fn add_symbols(&mut self, pattern: &[u8]) {
for c in pattern {
if self.is_nocase {
self.add_symbol(c.to_ascii_lowercase().into());
} else {
self.add_symbol((*c).into());
}
}
}
pub fn add_pattern(&mut self, pattern: &[u8], id: usize, flags: SmackFlags) {
let p = SmackPattern::new(make_copy_of_pattern(pattern, self.is_nocase), id, flags);
if p.is_anchor_begin {
self.is_anchor_begin = true;
}
if p.is_anchor_end {
self.is_anchor_end = true;
}
self.add_symbols(&p.pattern);
self.m_pattern_list.push(p);
self.m_pattern_count += 1;
}
fn set_goto(&mut self, r: usize, a: usize, h: usize) {
self.m_state_table[r].next_state[a] = h;
}
fn goto(&self, r: usize, a: usize) -> usize {
self.m_state_table[r].next_state[a]
}
fn set_goto_fail(&mut self, r: usize, h: usize) {
self.m_state_table[r].fail = h;
}
fn goto_fail(&self, r: usize) -> usize {
self.m_state_table[r].fail
}
fn new_state(&mut self) -> usize {
self.m_state_count += 1;
self.m_state_count - 1
}
fn add_prefixes(&mut self, p: &SmackPattern) {
let mut state = BASE_STATE;
let pattern = &p.pattern;
if p.is_anchor_begin {
state = self.goto(state, CHAR_ANCHOR_START);
}
let mut i = 0;
while i < pattern.len() && self.goto(state, pattern[i].into()) != FAIL_STATE {
state = self.goto(state, pattern[i].into());
i += 1;
}
while i < pattern.len() {
let new_state = self.new_state();
self.set_goto(state, pattern[i].into(), new_state);
state = new_state;
i += 1;
}
if p.is_anchor_end {
let new_state = self.new_state();
self.set_goto(state, CHAR_ANCHOR_END, new_state);
state = new_state;
}
self.m_match[state].copy_matches(vec![p.id]);
}
fn stage0_compile_prefixes(&mut self) {
self.m_state_count = 1;
for s in 0..self.m_state_max {
for a in 0..ALPHABET_SIZE {
self.set_goto(s, a, FAIL_STATE);
}
}
if self.is_anchor_begin {
let anchor_begin = self.new_state();
self.set_goto(BASE_STATE, CHAR_ANCHOR_START, anchor_begin);
}
let plist = mem::replace(&mut self.m_pattern_list, Vec::new());
for p in plist.iter() {
self.add_prefixes(&p);
}
self.m_pattern_list = plist;
for a in 0..ALPHABET_SIZE {
if self.goto(BASE_STATE, a) == FAIL_STATE {
self.set_goto(BASE_STATE, a, BASE_STATE);
}
}
}
fn stage1_generate_fails(&mut self) {
let mut queue: SmackQueue<usize> = SmackQueue::new();
for a in 0..ALPHABET_SIZE {
let s = self.goto(BASE_STATE, a);
if s != BASE_STATE {
queue.enqueue(s);
self.set_goto_fail(s, BASE_STATE);
}
}
while queue.has_more_items() {
let r = queue.dequeue();
for a in 0..ALPHABET_SIZE {
let s = self.goto(r, a);
if s == FAIL_STATE {
continue;
}
if s == r {
continue;
}
queue.enqueue(s);
let mut f = self.goto_fail(r);
while self.goto(f, a) == FAIL_STATE {
f = self.goto_fail(f);
}
self.set_goto_fail(s, self.goto(f, a));
if self.m_match[self.goto(f, a)].m_count > 0 {
let gt = self.goto(f, a);
let m = mem::take(&mut self.m_match[gt].m_ids);
self.m_match[s].copy_matches(m.clone());
self.m_match[gt].m_ids = m;
}
}
}
}
fn stage2_link_fails(&mut self) {
let mut queue = SmackQueue::new();
for a in 0..ALPHABET_SIZE {
if self.goto(BASE_STATE, a) != BASE_STATE {
queue.enqueue(self.goto(BASE_STATE, a));
}
}
loop {
if !queue.has_more_items() {
break;
}
let r = queue.dequeue();
for a in 0..ALPHABET_SIZE {
if self.goto(r, a) == FAIL_STATE {
self.set_goto(r, a, self.goto(self.goto_fail(r), a));
} else if self.goto(r, a) == r {
} else {
queue.enqueue(self.goto(r, a));
}
}
}
}
fn swap_rows(&mut self, row1: usize, row2: usize) {
let tmp = mem::replace(&mut self.m_state_table[row1], SmackRow::new());
self.m_state_table[row1] = mem::replace(&mut self.m_state_table[row2], tmp);
let tmp = mem::replace(&mut self.m_match[row1], SmackMatches::new());
self.m_match[row1] = mem::replace(&mut self.m_match[row2], tmp);
for s in 0..self.m_state_count {
for a in 0..ALPHABET_SIZE {
if self.goto(s, a) == row1 {
self.set_goto(s, a, row2);
} else if self.goto(s, a) == row2 {
self.set_goto(s, a, row1);
}
}
}
}
fn stage3_sort(&mut self) {
let mut start = 0;
let mut end = self.m_state_count;
loop {
while start < end && self.m_match[start].m_count == 0 {
start += 1;
}
while start < end && self.m_match[end - 1].m_count != 0 {
end -= 1;
}
if start >= end {
break;
}
self.swap_rows(start, end - 1);
}
self.m_match_limit = start;
}
fn stage4_make_final_table(&mut self) {
let row_count = self.m_state_count;
self.row_shift = row_shift_from_symbol_count(self.symbol_count);
let column_count = 1 << self.row_shift;
self.transitions = vec![0; row_count * column_count];
for row in 0..row_count {
for c in 0..ALPHABET_SIZE {
let symbol = usize::from(self.char_to_symbol[c]);
let transition = self.goto(row, c);
self.transitions[row * column_count + symbol] = transition;
}
}
}
fn fixup_wildcards(&mut self) {
for i in 0..self.m_pattern_count {
let p = &self.m_pattern_list[i];
if !p.is_wildcards {
continue;
}
for j in 0..p.pattern.len() {
let mut row = 0;
let mut offset = 0;
let row_size = 1 << self.row_shift;
let base_state = if self.is_anchor_begin {
UNANCHORED_STATE
} else {
BASE_STATE
};
if p.pattern[j] != b'*' {
continue;
}
while offset < j {
self.search_next(&mut row, &p.pattern[..j], &mut offset);
}
row &= 0xFFFFFF;
let next_pattern = self.transitions
[(row << self.row_shift) + usize::from(self.char_to_symbol[usize::from(b'*')])];
for k in 0..row_size {
if self.transitions[(row << self.row_shift) + k] == base_state {
self.transitions[(row << self.row_shift) + k] = next_pattern;
}
}
}
}
}
fn inner_match(&self, px: Vec<u8>, length: usize, state: usize) -> (usize, usize) {
let px_start = 0;
let px_end = length;
let mut row = state;
let mut idx = px_start;
while idx < px_end {
let column: usize = self.char_to_symbol[usize::from(px[idx])].into();
row = self.transitions[(row << self.row_shift) + column];
if row >= self.m_match_limit {
break;
}
idx += 1;
}
(idx - px_start, row)
}
fn inner_match_shift7(&self, px: Vec<u8>, length: usize, state: usize) -> (usize, usize) {
let px_start = 0;
let px_end = length;
let mut row = state;
let mut idx = px_start;
while idx < px_end {
let column: usize = self.char_to_symbol[usize::from(px[idx])].into();
row = self.transitions[(row << 7) + column];
if row >= self.m_match_limit {
break;
}
idx += 1;
}
(idx - px_start, row)
}
pub fn search_next(&self, current_state: &mut usize, v_px: &[u8], offset: &mut usize) -> usize {
let px = v_px;
let length = px.len();
let mut i = *offset;
let mut id = NO_MATCH;
let mut row = *current_state & 0xFFFFFF;
let mut current_matches = *current_state >> 24;
if current_matches == 0 {
if self.row_shift == 7 {
let (ii, new_row) = self.inner_match_shift7(px[i..].to_vec(), length - i, row);
i += ii;
row = new_row;
} else {
let (ii, new_row) = self.inner_match(px[i..].to_vec(), length - i, row);
i += ii;
row = new_row;
}
if self.m_match[row].m_count != 0 {
i += 1;
current_matches = self.m_match[row].m_count;
}
}
if current_matches != 0 {
id = self.m_match[row].m_ids[current_matches - 1];
current_matches -= 1;
}
let new_state = row | (current_matches << 24);
*current_state = new_state;
*offset = i;
id
}
pub fn search_next_end(&self, current_state: &mut usize) -> usize {
let id;
let mut row = *current_state & 0xFFFFFF;
let mut current_matches = *current_state >> 24;
let column = self.char_to_symbol[CHAR_ANCHOR_END];
/*
* We can enumerate more than one matching end patterns. When we
* reach the end of that list, return NOT FOUND.
*/
if current_matches == 0xFF {
return NO_MATCH;
}
/*
* If we've already returned the first result in our list,
* then return the next result.
*/
if current_matches != 0 {
id = self.m_match[row].m_ids[current_matches - 1];
current_matches -= 1;
} else {
/*
* This is the same logic as for "smack_search()", except there is
* only one byte of input -- the virtual character ($) that represents
* the anchor at the end of some patterns.
*/
row = self.transitions[(row << self.row_shift) + column as usize];
/* There was no match, so therefore return NOT FOUND */
if self.m_match[row].m_count == 0 {
return NO_MATCH;
}
/*
* If we reach this point, we have found matches, but
* haven't started returning them. So start returning
* them. This returns the first one in the list.
*/
current_matches = self.m_match[row].m_count;
id = self.m_match[row].m_ids[current_matches - 1];
if current_matches > 0 {
current_matches -= 1;
} else {
current_matches = 0xFF;
}
}
let new_state = row | (current_matches << 24);
*current_state = new_state;
id
}
pub fn _next_match(&self, current_state: &mut usize) -> usize {
let mut id = NO_MATCH;
let row = *current_state & 0xFFFFFF;
let mut current_matches = *current_state >> 24;
if current_matches != 0 {
id = self.m_match[row].m_ids[current_matches - 1];
current_matches -= 1;
}
*current_state = row | (current_matches << 24);
return id;
}
pub fn compile(&mut self) {
if self.is_anchor_begin {
self.add_symbol(CHAR_ANCHOR_START);
}
if self.is_anchor_end {
self.add_symbol(CHAR_ANCHOR_END);
}
if self.is_nocase {
for i in b'A'..b'Z' + 1 {
self.char_to_symbol[usize::from(i)] =
self.char_to_symbol[usize::from(i.to_ascii_lowercase())];
}
}
self.m_state_max = 1;
for p in self.m_pattern_list.iter() {
if p.is_anchor_begin {
self.m_state_max += 1;
}
if p.is_anchor_end {
self.m_state_max += 1;
}
self.m_state_max += p.pattern.len();
}
self.create_intermediate_table(self.m_state_max);
self.create_matches_table(self.m_state_max);
self.stage0_compile_prefixes();
self.stage1_generate_fails();
self.stage2_link_fails();
if self.is_anchor_begin {
self.swap_rows(BASE_STATE, UNANCHORED_STATE);
}
self.stage3_sort();
self.stage4_make_final_table();
// self.dump();
// self.dump_transitions();
self.fixup_wildcards();
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_pattern() {
let mut smack = Smack::new("test".to_string(), SMACK_CASE_INSENSITIVE);
let patterns = vec![
"GET",
"PUT",
"POST",
"OPTIONS",
"HEAD",
"DELETE",
"TRACE",
"CONNECT",
"PROPFIND",
"PROPPATCH",
"MKCOL",
"MKWORKSPACE",
"MOVE",
"LOCK",
"UNLOCK",
"VERSION-CONTROL",
"REPORT",
"CHECKOUT",
"CHECKIN",
"UNCHECKOUT",
"COPY",
"UPDATE",
"LABEL",
"BASELINE-CONTROL",
"MERGE",
"SEARCH",
"ACL",
"ORDERPATCH",
"PATCH",
"MKACTIVITY",
];
let text = "ahpropfinddf;orderpatchposearchmoversion-controlockasldhf";
let mut state = 0;
for (i, p) in patterns.iter().enumerate() {
smack.add_pattern(p.as_bytes(), i, SmackFlags::EMPTY);
}
smack.compile();
let mut i = 0;
let test = |pat: usize, offset: usize, id: usize, i: usize| (pat == id) && (offset == i);
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(test(8, 10, id, i));
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(test(28, 23, id, i));
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(test(27, 23, id, i));
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(test(25, 31, id, i));
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(test(12, 35, id, i));
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(test(15, 48, id, i));
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(test(13, 51, id, i));
}
#[test]
fn test_anchor_begin() {
/* test without anchor */
let mut smack = Smack::new("test anchor begin".to_string(), SMACK_CASE_INSENSITIVE);
smack.add_pattern(b"abc", 0, SmackFlags::EMPTY);
smack.add_pattern(b"def", 1, SmackFlags::EMPTY);
smack.compile();
let mut i = 0;
let mut state = BASE_STATE;
let text = "abc_def";
/* should find abc and then def */
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(id == 0);
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(id == 1);
/* test with anchor - OK */
let mut smack = Smack::new("test anchor begin".to_string(), SMACK_CASE_INSENSITIVE);
smack.add_pattern(b"abc", 0, SmackFlags::ANCHOR_BEGIN);
smack.add_pattern(b"def", 1, SmackFlags::EMPTY);
smack.compile();
let mut i = 0;
let mut state = BASE_STATE;
let text = "abc_def";
/* should find abc and then def */
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(id == 0);
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(id == 1);
/* test with anchor - KO */
let mut smack = Smack::new("test anchor begin".to_string(), SMACK_CASE_INSENSITIVE);
smack.add_pattern(b"abc", 0, SmackFlags::ANCHOR_BEGIN);
smack.add_pattern(b"def", 1, SmackFlags::ANCHOR_BEGIN);
smack.compile();
let mut i = 0;
let mut state = BASE_STATE;
let text = "abc_def";
/* should find abc and then nothing */
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(id == 0);
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(id == NO_MATCH);
}
#[test]
fn test_wildcard() {
/* test wildcard without wildcard */
let mut smack = Smack::new("test".to_string(), SMACK_CASE_INSENSITIVE);
smack.add_pattern(b"abc", 0, SmackFlags::EMPTY);
smack.add_pattern(b"egjkfhd", 1, SmackFlags::EMPTY);
/* here we do not specify the WILDCARD flag */
smack.add_pattern(b"c*ap", 2, SmackFlags::EMPTY);
smack.compile();
let mut i = 0;
let mut state = BASE_STATE;
let text = "abc_clap";
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(id == 0);
assert!(i == 3);
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(id != 2);
/* test wildcard */
let mut smack = Smack::new("test".to_string(), SMACK_CASE_INSENSITIVE);
smack.add_pattern(b"abc", 0, SmackFlags::EMPTY);
smack.add_pattern(b"egjkfhd", 1, SmackFlags::EMPTY);
smack.add_pattern(b"c*ap", 2, SmackFlags::WILDCARDS);
smack.compile();
let mut i = 0;
let mut state = BASE_STATE;
let text = "abc_clap";
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(id == 0);
assert!(i == 3);
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(id == 2);
/* test wildcard + anchor beg */
let mut smack = Smack::new("test".to_string(), SMACK_CASE_INSENSITIVE);
smack.add_pattern(
b"abc*ef",
0,
SmackFlags::ANCHOR_BEGIN | SmackFlags::WILDCARDS,
);
smack.compile();
let mut i = 0;
let mut state = BASE_STATE;
let text = "abc_ef";
let id = smack.search_next(&mut state, &text.as_bytes().to_vec(), &mut i);
assert!(id == 0);
}
#[test]
fn test_http_banner() {
let mut smack = Smack::new("test".to_string(), SMACK_CASE_INSENSITIVE);
smack.add_pattern(b"Server:", 0, SmackFlags::ANCHOR_BEGIN);
smack.add_pattern(b"Via:", 1, SmackFlags::ANCHOR_BEGIN);
smack.add_pattern(b"Location:", 2, SmackFlags::ANCHOR_BEGIN);
smack.add_pattern(b":", 3, SmackFlags::EMPTY);
smack.compile();
let mut state = BASE_STATE;
let mut offset = 0;
let id = smack.search_next(&mut state, &b"server: lol\n".to_vec(), &mut offset);
assert!(id == 3);
let id = smack._next_match(&mut state);
assert!(id == 0);
let id = smack._next_match(&mut state);
assert!(id == NO_MATCH);
}
#[test]
fn test_anchor_end() {
let mut smack = Smack::new("test".to_string(), SMACK_CASE_INSENSITIVE);
smack.add_pattern(b"def", 0, SmackFlags::ANCHOR_END);
smack.compile();
let mut state = BASE_STATE;
let mut offset = 0;
let mut id = smack.search_next(&mut state, &b"defabcabb".to_vec(), &mut offset);
assert!(id == NO_MATCH);
id = smack.search_next_end(&mut state);
assert!(id == NO_MATCH);
let mut state = BASE_STATE;
let mut offset = 0;
let mut id = smack.search_next(&mut state, &b"def".to_vec(), &mut offset);
assert!(id == NO_MATCH);
id = smack.search_next_end(&mut state);
assert!(id == 0);
let mut state = BASE_STATE;
let mut offset = 0;
let mut id = smack.search_next(&mut state, &b"abcdef".to_vec(), &mut offset);
assert!(id == NO_MATCH);
id = smack.search_next_end(&mut state);
assert!(id == 0);
}
#[test]
fn test_multiple_matches() {
let mut smack = Smack::new("test".to_string(), SMACK_CASE_INSENSITIVE);
smack.add_pattern(b"aabb", 0, SmackFlags::ANCHOR_BEGIN);
smack.add_pattern(b"abb", 1, SmackFlags::EMPTY);
smack.add_pattern(b"bb", 2, SmackFlags::EMPTY);
smack.compile();
let mut state = BASE_STATE;
let mut offset = 0;
let id = smack.search_next(&mut state, &b"aabb".to_vec(), &mut offset);
assert!(id <= 2);
let id = smack._next_match(&mut state);
assert!(id <= 2);
let id = smack._next_match(&mut state);
assert!(id <= 2);
let id = smack._next_match(&mut state);
assert!(id == NO_MATCH);
}
#[test]
fn test_multiple_matches_wildcard() {
let mut smack = Smack::new("test".to_string(), SMACK_CASE_INSENSITIVE);
smack.add_pattern(b"aab", 0, SmackFlags::ANCHOR_BEGIN);
smack.add_pattern(b"*ac", 1, SmackFlags::ANCHOR_BEGIN | SmackFlags::WILDCARDS);
smack.compile();
let mut state = BASE_STATE;
let mut offset = 0;
let id = smack.search_next(&mut state, &b"aab".to_vec(), &mut offset);
assert!(id == 0);
let mut state = BASE_STATE;
let mut offset = 0;
let id = smack.search_next(&mut state, &b"bac".to_vec(), &mut offset);
assert!(id == 1);
}
#[test]
fn test_proto() {
const PROTO_HTTP: usize = 0;
const PROTO_SMB: usize = 1;
let mut smack = Smack::new("proto".to_string(), SMACK_CASE_SENSITIVE);
/* HTTP markers */
let http_verbs = [
"GET /",
"PUT /",
"POST /",
"HEAD /",
"DELETE /",
"CONNECT /",
"OPTIONS /",
"TRACE /",
"PATCH /",
];
for (_, v) in http_verbs.iter().enumerate() {
smack.add_pattern(v.as_bytes(), PROTO_HTTP, SmackFlags::ANCHOR_BEGIN);
}
/* SMB markers */
smack.add_pattern(
b"\x00\x00**\xffSMB",
PROTO_SMB,
SmackFlags::ANCHOR_BEGIN | SmackFlags::WILDCARDS,
);
smack.compile();
let mut state = BASE_STATE;
let mut offset = 0;
let id = smack.search_next(&mut state, &b"HEAD /".to_vec(), &mut offset);
assert!(id == PROTO_HTTP);
let mut state = BASE_STATE;
let mut offset = 0;
let id = smack.search_next(&mut state, &b"\x00\x00aa\xffSMB".to_vec(), &mut offset);
assert!(id == PROTO_SMB);
}
}

12
src/smack/smack_constants.rs Normal file
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@ -0,0 +1,12 @@
pub const ALPHABET_SIZE: usize = 256 + 2;
pub const BASE_STATE: usize = 0;
pub const UNANCHORED_STATE: usize = 1;
pub const FAIL_STATE: usize = 0xFFFFFFFF;
pub const CHAR_ANCHOR_START: usize = 256;
pub const CHAR_ANCHOR_END: usize = 257;
pub const NO_MATCH: usize = 0xFFFFFFFFFFFFFFFF;
pub const SMACK_CASE_INSENSITIVE: bool = true;
pub const SMACK_CASE_SENSITIVE: bool = false;

21
src/smack/smack_pattern.rs Normal file
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@ -0,0 +1,21 @@
use crate::smack::smack_utils::SmackFlags;
pub struct SmackPattern {
pub id: usize,
pub pattern: Vec<u8>,
pub is_anchor_begin: bool,
pub is_anchor_end: bool,
pub is_wildcards: bool,
}
impl SmackPattern {
pub fn new(pattern: Vec<u8>, id: usize, flags: SmackFlags) -> Self {
SmackPattern {
id,
is_anchor_begin: flags.contains(SmackFlags::ANCHOR_BEGIN),
is_anchor_end: flags.contains(SmackFlags::ANCHOR_END),
is_wildcards: flags.contains(SmackFlags::WILDCARDS),
pattern,
}
}
}

18
src/smack/smack_queue.rs Normal file
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@ -0,0 +1,18 @@
pub struct SmackQueue<T> {
queue: Vec<T>,
}
impl<T> SmackQueue<T> {
pub fn new() -> Self {
SmackQueue { queue: Vec::new() }
}
pub fn enqueue(&mut self, data: T) {
self.queue.push(data);
}
pub fn dequeue(&mut self) -> T {
self.queue.remove(0)
}
pub fn has_more_items(&self) -> bool {
!self.queue.is_empty()
}
}

17
src/smack/smack_utils.rs Normal file
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@ -0,0 +1,17 @@
bitflags! {
pub struct SmackFlags: usize {
const EMPTY = 0x00;
const ANCHOR_BEGIN = 0x01;
const ANCHOR_END = 0x02;
const WILDCARDS = 0x04;
}
}
pub fn row_shift_from_symbol_count(symbol_count: usize) -> usize {
let mut row_shift = 1;
let symbol_count = symbol_count + 1;
while (1 << row_shift) < symbol_count {
row_shift += 1;
}
row_shift
}

357
src/synackcookie/mod.rs Normal file
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@ -0,0 +1,357 @@
use crate::client::ClientInfo;
use siphasher::sip::SipHasher24;
use std::convert::TryInto;
use std::hash::Hasher;
use std::io;
use std::net::IpAddr;
pub fn generate(client_info: &ClientInfo, key: &[u64; 2]) -> Result<u32, io::Error> {
/* check parameters */
/* ip fields must not be None */
if client_info.ip.src == None || client_info.ip.dst == None {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"IP addresses must not be None",
));
}
/* port fields must not be None */
if client_info.port.src == None || client_info.port.dst == None {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"Ports must not be None",
));
}
let mut sip = SipHasher24::new_with_keys(key[0], key[1]);
/* check IPAddr type */
if let Some(IpAddr::V6(s)) = client_info.ip.src {
if let Some(IpAddr::V6(d)) = client_info.ip.dst {
sip.write_u128(s.into());
sip.write_u128(d.into());
} else {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"The two IP addresses (src and dst) must be of same type",
));
}
} else if let Some(IpAddr::V4(s)) = client_info.ip.src {
if let Some(IpAddr::V4(d)) = client_info.ip.dst {
sip.write_u32(s.into());
sip.write_u32(d.into());
} else {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"The two IP addresses (src and dst) must be of same type",
));
}
} else {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"Unknown data type",
));
}
sip.write_u16(client_info.port.src.unwrap());
sip.write_u16(client_info.port.dst.unwrap());
Ok((sip.finish() & 0xFFFFFFFF).try_into().unwrap())
}
pub fn _check(client_info: &ClientInfo, val: u32, key: &[u64; 2]) -> bool {
if let Ok(cookie) = generate(client_info, &key) {
cookie == val
} else {
false
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::client::ClientInfoSrcDst;
use std::net::{Ipv4Addr, Ipv6Addr};
#[test]
fn test_ip4() {
let key = [0xfb3818fcf501729d, 0xeb3b3e8720618e69];
let ip_src = IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0));
let ip_dst = IpAddr::V4(Ipv4Addr::new(1, 1, 1, 1));
let tcp_sport = 65000;
let tcp_dport = 80;
let client_info = ClientInfo {
mac: ClientInfoSrcDst {
src: None,
dst: None,
},
ip: ClientInfoSrcDst {
src: Some(ip_src),
dst: Some(ip_dst),
},
transport: None,
port: ClientInfoSrcDst {
src: Some(tcp_sport),
dst: Some(tcp_dport),
},
cookie: None,
};
let res = generate(&client_info, &key);
if let Ok(_) = res {
assert!(true);
} else {
assert!(false);
}
}
#[test]
fn test_ip6() {
let key = [0x6b794087697b9180, 0x0c149aa303534b02];
let ip_src = IpAddr::V6(Ipv6Addr::new(
0xe50f, 0xe521, 0x70a2, 0xa3b3, 0x2135, 0x52d9, 0x6a0d, 0xe215,
));
let ip_dst = IpAddr::V6(Ipv6Addr::new(
0xc2eb, 0x33cf, 0x2c15, 0x4f7a, 0x7085, 0x492c, 0x2dbc, 0xf35b,
));
let tcp_sport = 65000;
let tcp_dport = 80;
let client_info = ClientInfo {
mac: ClientInfoSrcDst {
src: None,
dst: None,
},
ip: ClientInfoSrcDst {
src: Some(ip_src),
dst: Some(ip_dst),
},
transport: None,
port: ClientInfoSrcDst {
src: Some(tcp_sport),
dst: Some(tcp_dport),
},
cookie: None,
};
let res = generate(&client_info, &key);
if let Ok(_) = res {
assert!(true);
} else {
assert!(false);
}
}
#[test]
fn test_clientinfo() {
let key = [0x0b1a8621b0caf88d, 0x677cc071dab41639];
let err = Err(io::ErrorKind::InvalidInput);
/* all ok */
let ip_src = IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0));
let ip_dst = IpAddr::V4(Ipv4Addr::new(1, 1, 1, 1));
let tcp_sport = 65000;
let tcp_dport = 80;
let mut client_info = ClientInfo {
mac: ClientInfoSrcDst {
src: None,
dst: None,
},
ip: ClientInfoSrcDst {
src: Some(ip_src),
dst: Some(ip_dst),
},
transport: None,
port: ClientInfoSrcDst {
src: Some(tcp_sport),
dst: Some(tcp_dport),
},
cookie: None,
};
let res = generate(&client_info, &key);
if let Ok(_) = res {
assert!(true);
} else {
assert!(false);
}
/* ip src is None */
client_info.ip.src = None;
let res = generate(&client_info, &key);
assert_eq!(res.map_err(|e| e.kind()), err);
client_info.ip.src = Some(ip_src);
/* ip dst is None */
client_info.ip.dst = None;
let res = generate(&client_info, &key);
assert_eq!(res.map_err(|e| e.kind()), err);
client_info.ip.dst = Some(ip_dst);
/* port src is None */
client_info.port.src = None;
let res = generate(&client_info, &key);
assert_eq!(res.map_err(|e| e.kind()), err);
client_info.port.src = Some(tcp_sport);
/* port dst is None */
client_info.port.dst = None;
let res = generate(&client_info, &key);
assert_eq!(res.map_err(|e| e.kind()), err);
client_info.port.dst = Some(tcp_dport);
}
#[test]
fn test_key() {
/* reference */
let ref_key = [0x1e9219e0b0e0b44c, 0x9e460bcddf4eaac9];
let ip_src = IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0));
let ip_dst = IpAddr::V4(Ipv4Addr::new(1, 1, 1, 1));
let tcp_sport = 65000;
let tcp_dport = 80;
let client_info = ClientInfo {
mac: ClientInfoSrcDst {
src: None,
dst: None,
},
ip: ClientInfoSrcDst {
src: Some(ip_src),
dst: Some(ip_dst),
},
transport: None,
port: ClientInfoSrcDst {
src: Some(tcp_sport),
dst: Some(tcp_dport),
},
cookie: None,
};
let ref_cookie = generate(&client_info, &ref_key).unwrap();
assert!(_check(&client_info, ref_cookie, &ref_key));
/* change key */
let key = [0xc98a8cb8579004d4, 0x8b53a2735381ded4];
let cookie = generate(&client_info, &key).unwrap();
assert_ne!(ref_key, key);
assert_ne!(cookie, ref_cookie);
assert!(_check(&client_info, cookie, &key));
assert!(!_check(&client_info, ref_cookie, &key));
assert!(!_check(&client_info, cookie, &ref_key));
}
#[test]
fn test_ip4_src() {
let key = [0x77b781aaeca4f0d1, 0x7481d7251789d247];
/* reference */
let ip_src = IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0));
let ip_dst = IpAddr::V4(Ipv4Addr::new(1, 1, 1, 1));
let tcp_sport = 65000;
let tcp_dport = 80;
let mut client_info = ClientInfo {
mac: ClientInfoSrcDst {
src: None,
dst: None,
},
ip: ClientInfoSrcDst {
src: Some(ip_src),
dst: Some(ip_dst),
},
transport: None,
port: ClientInfoSrcDst {
src: Some(tcp_sport),
dst: Some(tcp_dport),
},
cookie: None,
};
let ref_cookie = generate(&client_info, &key).unwrap();
assert!(_check(&client_info, ref_cookie, &key));
client_info.ip.src = Some(IpAddr::V4(Ipv4Addr::new(0, 0, 0, 1)));
let cookie = generate(&client_info, &key).unwrap();
assert!(_check(&client_info, cookie, &key));
assert!(!_check(&client_info, ref_cookie, &key));
assert_ne!(cookie, ref_cookie);
}
#[test]
fn test_ip4_dst() {
let key = [0xe2ada0ff90978791, 0xb18586de261db429];
/* reference */
let ip_src = IpAddr::V4(Ipv4Addr::new(2, 2, 2, 2));
let ip_dst = IpAddr::V4(Ipv4Addr::new(3, 3, 3, 3));
let tcp_sport = 65000;
let tcp_dport = 80;
let mut client_info = ClientInfo {
mac: ClientInfoSrcDst {
src: None,
dst: None,
},
ip: ClientInfoSrcDst {
src: Some(ip_src),
dst: Some(ip_dst),
},
transport: None,
port: ClientInfoSrcDst {
src: Some(tcp_sport),
dst: Some(tcp_dport),
},
cookie: None,
};
let ref_cookie = generate(&client_info, &key).unwrap();
assert!(_check(&client_info, ref_cookie, &key));
client_info.ip.dst = Some(IpAddr::V4(Ipv4Addr::new(4, 4, 3, 3)));
let cookie = generate(&client_info, &key).unwrap();
assert!(_check(&client_info, cookie, &key));
assert!(!_check(&client_info, ref_cookie, &key));
assert_ne!(cookie, ref_cookie);
}
#[test]
fn test_tcp_src() {
let key = [0xda0e06f5916b0a24, 0x754a8c2f23106b5f];
/* reference */
let ip_src = IpAddr::V4(Ipv4Addr::new(1, 2, 3, 4));
let ip_dst = IpAddr::V4(Ipv4Addr::new(3, 4, 3, 4));
let tcp_sport = 65000;
let tcp_dport = 443;
let mut client_info = ClientInfo {
mac: ClientInfoSrcDst {
src: None,
dst: None,
},
ip: ClientInfoSrcDst {
src: Some(ip_src),
dst: Some(ip_dst),
},
transport: None,
port: ClientInfoSrcDst {
src: Some(tcp_sport),
dst: Some(tcp_dport),
},
cookie: None,
};
let ref_cookie = generate(&client_info, &key).unwrap();
assert!(_check(&client_info, ref_cookie, &key));
client_info.port.src = Some(12345);
let cookie = generate(&client_info, &key).unwrap();
assert!(_check(&client_info, cookie, &key));
assert!(!_check(&client_info, ref_cookie, &key));
assert_ne!(cookie, ref_cookie);
}
#[test]
fn test_tcp_dst() {
let key = [0x85fa7e3f1cd254b7, 0xcfce5e92a7bb7595];
/* reference */
let ip_src = IpAddr::V4(Ipv4Addr::new(200, 210, 220, 230));
let ip_dst = IpAddr::V4(Ipv4Addr::new(172, 48, 14, 103));
let tcp_sport = 65000;
let tcp_dport = 443;
let mut client_info = ClientInfo {
mac: ClientInfoSrcDst {
src: None,
dst: None,
},
ip: ClientInfoSrcDst {
src: Some(ip_src),
dst: Some(ip_dst),
},
transport: None,
port: ClientInfoSrcDst {
src: Some(tcp_sport),
dst: Some(tcp_dport),
},
cookie: None,
};
let ref_cookie = generate(&client_info, &key).unwrap();
assert!(_check(&client_info, ref_cookie, &key));
client_info.port.dst = Some(80);
let cookie = generate(&client_info, &key).unwrap();
assert!(_check(&client_info, cookie, &key));
assert!(!_check(&client_info, ref_cookie, &key));
assert_ne!(cookie, ref_cookie);
}
}

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mod parsers;
pub use parsers::IpAddrParser;

249
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use std::collections::{HashMap, HashSet};
use std::fs::File;
use std::io::BufRead;
use std::io::BufReader;
use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
use log::*;
use pcap_file::pcap::{Packet, PcapReader};
use pnet::packet::{
ethernet::{EtherTypes, EthernetPacket},
ipv4::Ipv4Packet,
ipv6::Ipv6Packet,
Packet as Pkt,
};
/* Generic IP packet (either IPv4 or IPv6) */
pub enum IpPacket<'a> {
V4(Ipv4Packet<'a>),
V6(Ipv6Packet<'a>),
}
/* Get source or dest. IP address from a packet (IPv4 or IPv6) */
impl<'a> IpPacket<'a> {
// Macro ?
pub fn src(&self) -> IpAddr {
match self {
IpPacket::V4(p) => IpAddr::V4(p.get_source()),
IpPacket::V6(p) => IpAddr::V6(p.get_source()),
}
}
pub fn dst(&self) -> IpAddr {
match self {
IpPacket::V4(p) => IpAddr::V4(p.get_destination()),
IpPacket::V6(p) => IpAddr::V6(p.get_destination()),
}
}
}
pub trait IpAddrParser {
fn extract_ip_addresses_with_count(
self,
blacklist: Option<HashSet<IpAddr>>,
) -> HashMap<IpAddr, u32>;
fn extract_ip_addresses_only(self, blacklist: Option<HashSet<IpAddr>>) -> HashSet<IpAddr>;
}
/* Parse IP addresses from a text file */
impl IpAddrParser for File {
fn extract_ip_addresses_with_count(
self,
blacklist: Option<HashSet<IpAddr>>,
) -> HashMap<IpAddr, u32> {
let mut ip_addresses = HashMap::new();
let buf = BufReader::new(self);
for (i, line) in buf.lines().enumerate() {
let entry: Vec<&str> = match &line {
Ok(l) => l.split('\t').collect(),
Err(e) => {
warn!("cannot read line {} - {}", i, e);
continue;
}
};
/* Should never occur */
if entry.is_empty() {
warn!("cannot parse line: {}", line.expect("error reading line"));
continue;
}
let ip: IpAddr;
if let Ok(val) = entry[0].parse::<Ipv4Addr>() {
ip = IpAddr::V4(val);
} else if let Ok(val) = entry[0].parse::<Ipv6Addr>() {
ip = IpAddr::V6(val);
} else {
warn!(
"cannot parse IP address from line: {}",
line.expect("error reading line")
);
continue;
}
if let Some(ref b) = blacklist {
if b.contains(&ip) {
info!("[blacklist] ignoring {}", &ip);
continue;
}
}
let ip_entry = ip_addresses.entry(ip).or_insert(0);
if entry.len() < 2 {
continue;
}
if let Ok(count) = entry[1].parse::<u32>() {
*ip_entry += count;
}
}
ip_addresses
}
fn extract_ip_addresses_only(self, blacklist: Option<HashSet<IpAddr>>) -> HashSet<IpAddr> {
let mut ip_addresses = HashSet::new();
let buf = BufReader::new(self);
for (i, line) in buf.lines().enumerate() {
let entry: Vec<&str> = match &line {
Ok(l) => l.split('\t').collect(),
Err(e) => {
warn!("cannot read line {} - {}", i, e);
continue;
}
};
/* Should never occur */
if entry.is_empty() {
warn!("cannot parse line: {}", line.expect("error reading line"));
continue;
}
let ip: IpAddr;
if let Ok(val) = entry[0].parse::<Ipv4Addr>() {
ip = IpAddr::V4(val);
} else if let Ok(val) = entry[0].parse::<Ipv6Addr>() {
ip = IpAddr::V6(val);
} else {
warn!(
"cannot parse IP address from line: {}",
line.expect("error reading line")
);
continue;
}
if let Some(ref b) = blacklist {
if b.contains(&ip) {
info!("[blacklist] ignoring {}", &ip);
continue;
}
}
ip_addresses.insert(ip);
}
ip_addresses
}
}
/* Get the IP address of source and dest. from an IP packet.
* works with both IPv4 and IPv6 packets/addresses */
fn extract_ip(pkt: Packet) -> Option<(IpAddr, IpAddr)> {
let eth = EthernetPacket::new(&pkt.data).expect("error parsing Ethernet packet");
let payload = eth.payload();
let ip = match eth.get_ethertype() {
EtherTypes::Ipv4 => match Ipv4Packet::new(payload) {
Some(p) => IpPacket::V4(p),
None => {
warn!("error parsing IPv4 packet - {:?}", pkt);
return None;
}
},
EtherTypes::Ipv6 => match Ipv6Packet::new(payload) {
Some(p) => IpPacket::V6(p),
None => {
warn!("error parsing IPv6 packet - {:?}", pkt);
return None;
}
},
EtherTypes::Arp => {
return None;
}
t => {
warn!("unknown layer 2: {}", t);
return None;
}
};
Some((ip.src(), ip.dst()))
}
impl IpAddrParser for PcapReader<std::fs::File> {
/* Extract IP addresses (v4 and v6) from a capture and count occurrences of
* each. */
fn extract_ip_addresses_with_count(
self: PcapReader<std::fs::File>,
blacklist: Option<HashSet<IpAddr>>,
) -> HashMap<IpAddr, u32> {
let mut ip_addresses = HashMap::new();
// pcap.map(fn) , map_Ok
// .iter, into_iter
for pkt in self {
match pkt {
Ok(pkt) => {
// map_Some map_None
if let Some((s, d)) = extract_ip(pkt) {
match blacklist {
Some(ref b) if b.contains(&s) => {
info!("[blacklist] ignoring {}", &s);
}
_ => {
let ip = ip_addresses.entry(s).or_insert(0);
*ip += 1;
}
}
match blacklist {
Some(ref b) if b.contains(&d) => {
info!("[blacklist] ignoring {}", &d);
}
_ => {
let ip = ip_addresses.entry(d).or_insert(0);
*ip += 1;
}
}
};
}
Err(e) => {
warn!("error reading packet - {}", e);
continue;
}
}
}
ip_addresses
}
fn extract_ip_addresses_only(
self: PcapReader<std::fs::File>,
blacklist: Option<HashSet<IpAddr>>,
) -> HashSet<IpAddr> {
let mut ip_addresses = HashSet::new();
// pcap.map(fn) , map_Ok
// .iter, into_iter
for pkt in self {
match pkt {
Ok(pkt) => {
// map_Some map_None
if let Some((s, d)) = extract_ip(pkt) {
match blacklist {
Some(ref b) if b.contains(&s) => {
info!("[blacklist] ignoring {}", &s);
}
_ => {
ip_addresses.insert(s);
}
}
match blacklist {
Some(ref b) if b.contains(&d) => {
info!("[blacklist] ignoring {}", &d);
}
_ => {
ip_addresses.insert(d);
}
}
};
}
Err(e) => {
warn!("error reading packet - {}", e);
continue;
}
}
}
ip_addresses
}
}

0
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15
test/src/__init__.py Normal file
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# This file is part of masscanned.
# Copyright 2021 - The IVRE project
#
# Masscanned is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Masscanned is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
# License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Masscanned. If not, see <http://www.gnu.org/licenses/>.

593
test/src/all.py Normal file
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# This file is part of masscanned.
# Copyright 2021 - The IVRE project
#
# Masscanned is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Masscanned is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
# License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
from scapy.all import *
import requests
import requests.packages.urllib3.util.connection as urllib3_cn
import logging
from .conf import *
fmt = logging.Formatter("%(levelname)s\t%(message)s")
ch = logging.StreamHandler()
ch.setFormatter(fmt)
ch.setLevel(logging.DEBUG)
LOG = logging.getLogger(__name__)
LOG.setLevel(logging.DEBUG)
LOG.addHandler(ch)
tests = list()
# decorator to automatically add a function to tests
def test(f):
OK = "\033[1mOK\033[0m"
KO = "\033[1m\033[1;%dmKO\033[0m" % 31
global tests
fname = f.__name__.ljust(50, '.')
def w(iface):
try:
f(iface)
LOG.info("{}{}".format(fname, OK))
except AssertionError as e:
LOG.info("{}{}: {}".format(fname, KO, e))
tests.append(w)
return w
def multicast(ip6):
a, b = ip6.split(":")[-2:]
mac = ["33", "33", "ff"]
if len(a) == 4:
mac.append(a[2:])
else:
mac.append("00")
if len(b) >= 2:
mac.append(b[:2])
else:
mac.append("00")
if len(b) >= 4:
mac.append(b[2:])
else:
mac.append("00")
return ":".join(mac)
def check_ip_checksum(pkt):
assert(IP in pkt), "no IP layer found"
ip_pkt = pkt[IP]
chksum = ip_pkt.chksum
del ip_pkt.chksum
assert(IP(raw(ip_pkt)).chksum == chksum), "bad IPv4 checksum"
def check_ipv6_checksum(pkt):
assert(IPv6 in pkt), "no IP layer found"
ip_pkt = pkt[IPv6]
chksum = ip_pkt.chksum
del ip_pkt.chksum
assert(IPv6(raw(ip_pkt)).chksum == chksum), "bad IPv6 checksum"
@test
def test_arp_req(iface):
##### ARP #####
arp_req = Ether()/ARP(psrc='192.0.0.2', pdst=IPV4_ADDR)
arp_repl = iface.sr1(arp_req, timeout=1)
assert(arp_repl is not None), "expecting answer, got nothing"
assert(ARP in arp_repl), "no ARP layer found"
arp_repl = arp_repl[ARP]
# check answer
## op is "is-at"
assert(arp_repl.op == 2), "unexpected ARP op: {}".format(arp_repl.op)
## answer for the requested IP
assert(arp_repl.psrc == arp_req.pdst), "unexpected ARP psrc: {}".format(arp_repl.psrc)
assert(arp_repl.pdst == arp_req.psrc), "unexpected ARP pdst: {}".format(arp_repl.pdst)
## answer is expected MAC address
assert(arp_repl.hwsrc == MAC_ADDR), "unexpected ARP hwsrc: {}".format(arp_repl.hwsrc)
@test
def test_arp_req_other_ip(iface):
##### ARP #####
arp_req = Ether()/ARP(psrc='192.0.0.2', pdst='1.2.3.4')
arp_repl = iface.sr1(arp_req, timeout=1)
assert(arp_repl is None), "responding to ARP requests for other IP addresses"
@test
def test_ipv4_req(iface):
##### IP #####
ip_req = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR, id=0x1337)/ICMP(type=8, code=0)
ip_repl = iface.sr1(ip_req, timeout=1)
assert(ip_repl is not None), "expecting answer, got nothing"
check_ip_checksum(ip_repl)
assert(IP in ip_repl), "no IP layer in response"
ip_repl = ip_repl[IP]
assert(ip_repl.id == 0), "IP identification unexpected"
@test
def test_eth_req_other_mac(iface):
#### ETH ####
ip_req = Ether(dst="00:00:00:11:11:11")/IP(dst=IPV4_ADDR)/ICMP(type=8, code=0)
ip_repl = iface.sr1(ip_req, timeout=1)
assert(ip_repl is None), "responding to other MAC addresses"
@test
def test_ipv4_req_other_ip(iface):
##### IP #####
ip_req = Ether(dst=MAC_ADDR)/IP(dst="1.2.3.4")/ICMP(type=8, code=0)
ip_repl = iface.sr1(ip_req, timeout=1)
assert(ip_repl is None), "responding to other IP addresses"
@test
def test_icmpv4_echo_req(iface):
##### ICMPv4 #####
icmp_req = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/ICMP(type=8, code=0)/Raw("idrinkwaytoomuchcoffee")
icmp_repl = iface.sr1(icmp_req, timeout=1)
assert(icmp_repl is not None), "expecting answer, got nothing"
check_ip_checksum(icmp_repl)
assert(ICMP in icmp_repl)
icmp_repl = icmp_repl[ICMP]
# check answer
## type is "echo-reply"
assert(icmp_repl.type == 0)
assert(icmp_repl.code == 0)
## data is the same as sent
assert(icmp_repl.load == icmp_req.load)
@test
def test_icmpv6_neighbor_solicitation(iface):
##### IPv6 Neighbor Solicitation #####
for mac in ["ff:ff:ff:ff:ff:ff", "33:33:00:00:00:01", MAC_ADDR, multicast(IPV6_ADDR)]:
nd_ns = Ether(dst=mac)/IPv6()/ICMPv6ND_NS(tgt=IPV6_ADDR)
nd_na = iface.sr1(nd_ns, timeout=1)
assert(nd_na is not None), "expecting answer, got nothing"
assert(ICMPv6ND_NA in nd_na)
nd_na = nd_na[ICMPv6ND_NA]
# check answer content
assert(nd_na.code == 0)
assert(nd_na.R == 0)
assert(nd_na.S == 1)
assert(nd_na.O == 1)
assert(nd_na.tgt == IPV6_ADDR)
# check ND Option
assert(nd_na.haslayer(ICMPv6NDOptDstLLAddr))
assert(nd_na.getlayer(ICMPv6NDOptDstLLAddr).lladdr == MAC_ADDR)
for mac in ["00:00:00:00:00:00", "33:33:33:00:00:01"]:
nd_ns = Ether(dst="ff:ff:ff:ff:ff:ff")/IPv6()/ICMPv6ND_NS(tgt=IPV6_ADDR)
nd_na = iface.sr1(nd_ns, timeout=1)
assert(nd_na is not None), "expecting no answer, got one"
@test
def test_icmpv6_neighbor_solicitation_other_ip(iface):
##### IPv6 Neighbor Solicitation #####
nd_ns = Ether(dst="ff:ff:ff:ff:ff:ff")/IPv6()/ICMPv6ND_NS(tgt="2020:4141:3030:2020::bdbd")
nd_na = iface.sr1(nd_ns, timeout=1)
assert(nd_na is None), "responding to ND_NS for other IP addresses"
@test
def test_icmpv6_echo_req(iface):
##### IPv6 Ping #####
echo_req = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/ICMPv6EchoRequest(data="waytoomanynapkins")
echo_repl = iface.sr1(echo_req, timeout=1)
assert(echo_repl is not None), "expecting answer, got nothing"
assert(ICMPv6EchoReply in echo_repl)
echo_repl = echo_repl[ICMPv6EchoReply]
# check answer content
assert(echo_repl.code == 0)
assert(echo_repl.data == echo_req.data)
@test
def test_tcp_syn(iface):
##### SYN-ACK #####
# test a list of ports, randomly generated once
ports_to_test = [
1152, 2003, 2193, 3709, 4054, 6605, 6737, 6875, 7320, 8898, 9513, 9738, 10623, 10723,
11253, 12125, 12189, 12873, 14648, 14659, 16242, 16243, 17209, 17492, 17667, 17838,
18081, 18682, 18790, 19124, 19288, 19558, 19628, 19789, 20093, 21014, 21459, 21740,
24070, 24312, 24576, 26939, 27136, 27165, 27361, 29971, 31088, 33011, 33068, 34990,
35093, 35958, 36626, 36789, 37130, 37238, 37256, 37697, 37890, 38958, 42131, 43864,
44420, 44655, 44868, 45157, 46213, 46497, 46955, 49049, 49067, 49452, 49480, 50498,
50945, 51181, 52890, 53301, 53407, 53417, 53980, 55827, 56483, 58552, 58713, 58836,
59362, 59560, 60534, 60555, 60660, 61615, 62402, 62533, 62941, 63240, 63339, 63616,
64380, 65438,
]
for p in ports_to_test:
syn = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="S", dport=p)
syn_ack = iface.sr1(syn, timeout=1)
assert(syn_ack is not None), "expecting answer, got nothing"
check_ip_checksum(syn_ack)
assert(TCP in syn_ack)
syn_ack = syn_ack[TCP]
assert(syn_ack.flags == "SA")
@test
def test_ipv4_tcp_psh_ack(iface):
##### PSH-ACK #####
sport = 26695
port = 445
# send PSH-ACK first
psh_ack = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="PA", dport=port)/Raw("payload")
syn_ack = iface.sr1(psh_ack, timeout=1)
assert(syn_ack is None), "no answer expected, got one"
# test the anti-injection mechanism
syn = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="S", dport=port)
syn_ack = iface.sr1(syn, timeout=1)
assert(syn_ack is not None), "expecting answer, got nothing"
check_ip_checksum(syn_ack)
assert(TCP in syn_ack)
syn_ack = syn_ack[TCP]
assert(syn_ack.flags == "SA")
ack = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="A", dport=port)
# should fail because no ack given
psh_ack = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="PA", dport=port)
ack = iface.sr1(psh_ack, timeout=1)
assert(ack is None), "no answer expected, got one"
# should get an answer this time
psh_ack = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="PA", dport=port, ack=syn_ack.seq + 1)
ack = iface.sr1(psh_ack, timeout=1)
assert(ack is not None), "expecting answer, got nothing"
check_ip_checksum(ack)
assert(TCP in ack)
ack = ack[TCP]
assert(ack.flags == "A")
@test
def test_ipv6_tcp_psh_ack(iface):
##### PSH-ACK #####
sport = 26695
port = 445
# send PSH-ACK first
psh_ack = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/TCP(flags="PA", dport=port)/Raw("payload")
syn_ack = iface.sr1(psh_ack, timeout=1)
assert(syn_ack is None), "no answer expected, got one"
# test the anti-injection mechanism
syn = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/TCP(flags="S", dport=port)
syn_ack = iface.sr1(syn, timeout=1)
assert(syn_ack is not None), "expecting answer, got nothing"
check_ipv6_checksum(syn_ack)
assert(TCP in syn_ack)
syn_ack = syn_ack[TCP]
assert(syn_ack.flags == "SA")
ack = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/TCP(flags="A", dport=port)
# should fail because no ack given
psh_ack = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/TCP(flags="PA", dport=port)
ack = iface.sr1(psh_ack, timeout=1)
assert(ack is None), "no answer expected, got one"
# should get an answer this time
psh_ack = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/TCP(flags="PA", dport=port, ack=syn_ack.seq + 1)
ack = iface.sr1(psh_ack, timeout=1)
assert(ack is not None), "expecting answer, got nothing"
check_ipv6_checksum(ack)
assert(TCP in ack)
ack = ack[TCP]
assert(ack.flags == "A")
@test
def test_ipv4_tcp_http(iface):
sport = 24592
dports = [80, 443, 5000, 53228]
for dport in dports:
syn = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="S", sport=sport, dport=dport)
syn_ack = iface.sr1(syn, timeout=1)
assert(syn_ack is not None), "expecting answer, got nothing"
check_ip_checksum(syn_ack)
assert(TCP in syn_ack)
syn_ack = syn_ack[TCP]
assert(syn_ack.flags == "SA")
ack = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="A", sport=sport, dport=dport, ack=syn_ack.seq + 1)
_ = iface.sr1(ack, timeout=1)
req = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="PA", ack=syn_ack.seq + 1, sport=sport, dport=dport)/Raw("GET / HTTP/1.1\r\n\r\n")
resp = iface.sr1(req, timeout=1)
assert(resp is not None), "expecting answer, got nothing"
check_ip_checksum(resp)
assert(TCP in resp)
tcp = resp[TCP]
assert(tcp.payload.load.startswith(b"HTTP/1.1 401 Unauthorized\n"))
@test
def test_ipv6_tcp_http(iface):
sport = 24592
dports = [80, 443, 5000, 53228]
for dport in dports:
syn = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/TCP(flags="S", sport=sport, dport=dport)
syn_ack = iface.sr1(syn, timeout=1)
assert(syn_ack is not None), "expecting answer, got nothing"
check_ipv6_checksum(syn_ack)
assert(TCP in syn_ack)
syn_ack = syn_ack[TCP]
assert(syn_ack.flags == "SA")
ack = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/TCP(flags="A", sport=sport, dport=dport, ack=syn_ack.seq + 1)
_ = iface.sr1(ack, timeout=1)
req = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/TCP(flags="PA", ack=syn_ack.seq + 1, sport=sport, dport=dport)/Raw("GET / HTTP/1.1\r\n\r\n")
resp = iface.sr1(req, timeout=1)
assert(resp is not None), "expecting answer, got nothing"
check_ipv6_checksum(resp)
assert(TCP in resp)
tcp = resp[TCP]
assert(tcp.payload.load.startswith(b"HTTP/1.1 401 Unauthorized\n"))
@test
def test_ipv4_udp_http(iface):
sport = 24592
dports = [80, 443, 5000, 53228]
for dport in dports:
req = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/UDP(sport=sport, dport=dport)/Raw("GET / HTTP/1.1\r\n\r\n")
resp = iface.sr1(req, timeout=1)
assert(resp is not None), "expecting answer, got nothing"
check_ip_checksum(resp)
assert(UDP in resp)
udp = resp[UDP]
assert(udp.payload.load.startswith(b"HTTP/1.1 401 Unauthorized\n"))
@test
def test_ipv6_udp_http(iface):
sport = 24592
dports = [80, 443, 5000, 53228]
for dport in dports:
req = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/UDP(sport=sport, dport=dport)/Raw("GET / HTTP/1.1\r\n\r\n")
resp = iface.sr1(req, timeout=1)
assert(resp is not None), "expecting answer, got nothing"
check_ipv6_checksum(resp)
assert(UDP in resp)
udp = resp[UDP]
assert(udp.payload.load.startswith(b"HTTP/1.1 401 Unauthorized\n"))
@test
def test_ipv4_tcp_http_ko(iface):
sport = 24592
dports = [80, 443, 5000, 53228]
for dport in dports:
syn = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="S", sport=sport, dport=dport)
syn_ack = iface.sr1(syn, timeout=1)
assert(syn_ack is not None), "expecting answer, got nothing"
check_ip_checksum(syn_ack)
assert(TCP in syn_ack)
syn_ack = syn_ack[TCP]
assert(syn_ack.flags == "SA")
ack = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="A", sport=sport, dport=dport, ack=syn_ack.seq + 1)
_ = iface.sr1(ack, timeout=1)
req = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="PA", ack=syn_ack.seq + 1, sport=sport, dport=dport)/Raw(bytes.fromhex("4f5054494f4e53"))
resp = iface.sr1(req, timeout=1)
assert(resp is not None), "expecting answer, got nothing"
check_ip_checksum(resp)
assert(TCP in resp)
assert("P" not in resp[TCP].flags)
assert(len(resp[TCP].payload) == 0)
@test
def test_ipv4_udp_http_ko(iface):
sport = 24592
dports = [80, 443, 5000, 53228]
for dport in dports:
req = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/UDP(sport=sport, dport=dport)/Raw(bytes.fromhex("4f5054494f4e53"))
resp = iface.sr1(req, timeout=1)
assert(resp is None), "expecting no answer, got one"
@test
def test_ipv6_tcp_http_ko(iface):
sport = 24592
dports = [80, 443, 5000, 53228]
for dport in dports:
syn = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/TCP(flags="S", sport=sport, dport=dport)
syn_ack = iface.sr1(syn, timeout=1)
assert(syn_ack is not None), "expecting answer, got nothing"
check_ipv6_checksum(syn_ack)
assert(TCP in syn_ack)
syn_ack = syn_ack[TCP]
assert(syn_ack.flags == "SA")
ack = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/TCP(flags="A", sport=sport, dport=dport, ack=syn_ack.seq + 1)
_ = iface.sr1(ack, timeout=1)
req = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/TCP(flags="PA", ack=syn_ack.seq + 1, sport=sport, dport=dport)/Raw(bytes.fromhex("4f5054494f4e53"))
resp = iface.sr1(req, timeout=1)
assert(resp is not None), "expecting answer, got nothing"
check_ipv6_checksum(resp)
assert(TCP in resp)
assert("P" not in resp[TCP].flags)
assert(len(resp[TCP].payload) == 0)
@test
def test_ipv6_udp_http_ko(iface):
sport = 24592
dports = [80, 443, 5000, 53228]
for dport in dports:
req = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/UDP(sport=sport, dport=dport)/Raw(bytes.fromhex("4f5054494f4e53"))
resp = iface.sr1(req, timeout=1)
assert(resp is None), "expecting no answer, got one"
@test
def test_ipv4_udp_stun(iface):
sports = [12345, 55555, 80, 43273]
dports = [80, 800, 8000, 3478]
payload = bytes.fromhex("000100002112a442000000000000000000000000")
for sport in sports:
for dport in dports:
req = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/UDP(sport=sport, dport=dport)/Raw(payload)
resp = iface.sr1(req, timeout=1)
assert(resp is not None), "expecting answer, got nothing"
check_ip_checksum(resp)
assert(UDP in resp), "no UDP layer found"
udp = resp[UDP]
assert(udp.sport == dport), "unexpected UDP sport: {}".format(udp.sport)
assert(udp.dport == sport), "unexpected UDP dport: {}".format(udp.dport)
resp_payload = udp.payload.load
type_, length, magic = struct.unpack(">HHI", resp_payload[:8])
tid = resp_payload[8:20]
data = resp_payload[20:]
assert(type_ == 0x0101), "expected type 0X0101, got 0x{:04x}".format(type_)
assert(length == 12), "expected length 12, got {}".format(length)
assert(magic == 0x2112a442), "expected magic 0x2112a442, got 0x{:08x}".format(magic)
assert(tid == b'\x00' * 12), "expected tid 0x000000000000000000000000, got {:x}".format(tid)
assert(data == bytes.fromhex("000100080001") + struct.pack(">H", sport) + bytes.fromhex("00000000")), "unexpected data"
@test
def test_ipv6_udp_stun(iface):
sports = [12345, 55555, 80, 43273]
dports = [80, 800, 8000, 3478]
payload = bytes.fromhex("000100002112a442000000000000000000000000")
for sport in sports:
for dport in dports:
req = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/UDP(sport=sport, dport=dport)/Raw(payload)
resp = iface.sr1(req, timeout=1)
assert(resp is not None), "expecting answer, got nothing"
check_ipv6_checksum(resp)
assert(UDP in resp)
udp = resp[UDP]
assert(udp.sport == dport)
assert(udp.dport == sport)
resp_payload = udp.payload.load
type_, length, magic = struct.unpack(">HHI", resp_payload[:8])
tid = resp_payload[8:20]
data = resp_payload[20:]
assert(type_ == 0x0101), "expected type 0X0101, got 0x{:04x}".format(type_)
assert(length == 24), "expected length 24, got {}".format(length)
assert(magic == 0x2112a442), "expected magic 0x2112a442, got 0x{:08x}".format(magic)
assert(tid == b'\x00' * 12), "expected tid 0x000000000000000000000000, got {:x}".format(tid)
assert(data == bytes.fromhex("000100140002") + struct.pack(">H", sport) + bytes.fromhex("00000000" * 4)), "unexpected data: {}".format(data)
@test
def test_ipv4_udp_stun_change_port(iface):
sports = [12345, 55555, 80, 43273]
dports = [80, 800, 8000, 3478, 65535]
payload = bytes.fromhex("0001000803a3b9464dd8eb75e19481474293845c0003000400000002")
for sport in sports:
for dport in dports:
req = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/UDP(sport=sport, dport=dport)/Raw(payload)
resp = iface.sr1(req, timeout=1)
assert(resp is not None), "expecting answer, got nothing"
check_ip_checksum(resp)
assert(UDP in resp), "no UDP layer found"
udp = resp[UDP]
assert(udp.sport == (dport + 1) % 2**16), "expected answer from UDP/{}, got it from UDP/{}".format((dport + 1) % 2**16, udp.sport)
assert(udp.dport == sport), "expected answer to UDP/{}, got it to UDP/{}".format(sport, udp.dport)
resp_payload = udp.payload.load
type_, length = struct.unpack(">HH", resp_payload[:4])
tid = resp_payload[4:20]
data = resp_payload[20:]
assert(type_ == 0x0101), "expected type 0X0101, got 0x{:04x}".format(type_)
assert(length == 12), "expected length 12, got {}".format(length)
assert(tid == bytes.fromhex("03a3b9464dd8eb75e19481474293845c")), "expected tid 0x03a3b9464dd8eb75e19481474293845c, got %r" % tid
assert(data == bytes.fromhex("000100080001") + struct.pack(">H", sport) + bytes.fromhex("00000000")), "unexpected data"
@test
def test_ipv6_udp_stun_change_port(iface):
sports = [12345, 55555, 80, 43273]
dports = [80, 800, 8000, 3478, 65535]
payload = bytes.fromhex("0001000803a3b9464dd8eb75e19481474293845c0003000400000002")
for sport in sports:
for dport in dports:
req = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/UDP(sport=sport, dport=dport)/Raw(payload)
resp = iface.sr1(req, timeout=1)
assert(resp is not None), "expecting answer, got nothing"
check_ipv6_checksum(resp)
assert(UDP in resp), "expecting UDP layer in answer, got nothing"
udp = resp[UDP]
assert(udp.sport == (dport + 1) % 2**16), "expected answer from UDP/{}, got it from UDP/{}".format((dport + 1) % 2**16, udp.sport)
assert(udp.dport == sport), "expected answer to UDP/{}, got it to UDP/{}".format(sport, udp.dport)
resp_payload = udp.payload.load
type_, length = struct.unpack(">HH", resp_payload[:4])
tid = resp_payload[4:20]
data = resp_payload[20:]
assert(type_ == 0x0101), "expected type 0X0101, got 0x{:04x}".format(type_)
assert(length == 24), "expected length 12, got {}".format(length)
assert(tid == bytes.fromhex("03a3b9464dd8eb75e19481474293845c")), "expected tid 0x03a3b9464dd8eb75e19481474293845c, got %r" % tid
assert(data == bytes.fromhex("000100140002") + struct.pack(">H", sport) + bytes.fromhex("00000000" * 4))
@test
def test_ipv4_tcp_ssh(iface):
sport = 37183
dports = [22, 80, 2222, 2022, 23874, 50000]
for i, dport in enumerate(dports):
banner = [b"SSH-2.0-AsyncSSH_2.1.0", b"SSH-2.0-PuTTY", b"SSH-2.0-libssh2_1.4.3", b"SSH-2.0-Go", b"SSH-2.0-PUTTY"][i % 5]
syn = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="S", sport=sport, dport=dport)
syn_ack = iface.sr1(syn, timeout=1)
assert(syn_ack is not None), "expecting answer, got nothing"
check_ip_checksum(syn_ack)
assert(TCP in syn_ack)
syn_ack = syn_ack[TCP]
assert(syn_ack.flags == "SA")
ack = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="A", sport=sport, dport=dport, ack=syn_ack.seq + 1)
_ = iface.sr1(ack, timeout=1)
req = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/TCP(flags="PA", ack=syn_ack.seq + 1, sport=sport, dport=dport)/Raw(banner + b"\r\n")
resp = iface.sr1(req, timeout=1)
assert(resp is not None), "expecting answer, got nothing"
check_ip_checksum(resp)
assert(TCP in resp)
tcp = resp[TCP]
assert("A" in tcp.flags), "expecting ACK flag, not set (%r)" % tcp.flags
assert("P" in tcp.flags), "expecting PSH flag, not set (%r)" % tcp.flags
assert(len(tcp.payload) > 0), "expecting payload, got none"
assert(tcp.payload.load.startswith(b"SSH-2.0-")), "unexpected banner: %r" % tcp.payload.load
assert(tcp.payload.load.endswith(b"\r\n")), "unexpected banner: %r" % tcp.payload.load
@test
def test_ipv4_udp_ssh(iface):
sport = 37183
dports = [22, 80, 2222, 2022, 23874, 50000]
for i, dport in enumerate(dports):
banner = [b"SSH-2.0-AsyncSSH_2.1.0", b"SSH-2.0-PuTTY", b"SSH-2.0-libssh2_1.4.3", b"SSH-2.0-Go", b"SSH-2.0-PUTTY"][i % 5]
req = Ether(dst=MAC_ADDR)/IP(dst=IPV4_ADDR)/UDP(sport=sport, dport=dport)/Raw(banner + b"\r\n")
resp = iface.sr1(req, timeout=1)
assert(resp is not None), "expecting answer, got nothing"
check_ip_checksum(resp)
assert(UDP in resp)
udp = resp[UDP]
assert(len(udp.payload) > 0), "expecting payload, got none"
assert(udp.payload.load.startswith(b"SSH-2.0-")), "unexpected banner: %r" % udp.payload.load
assert(udp.payload.load.endswith(b"\r\n")), "unexpected banner: %r" % udp.payload.load
@test
def test_ipv6_tcp_ssh(iface):
sport = 37183
dports = [22, 80, 2222, 2022, 23874, 50000]
for i, dport in enumerate(dports):
banner = [b"SSH-2.0-AsyncSSH_2.1.0", b"SSH-2.0-PuTTY", b"SSH-2.0-libssh2_1.4.3", b"SSH-2.0-Go", b"SSH-2.0-PUTTY"][i % 5]
syn = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/TCP(flags="S", sport=sport, dport=dport)
syn_ack = iface.sr1(syn, timeout=1)
assert(syn_ack is not None), "expecting answer, got nothing"
check_ipv6_checksum(syn_ack)
assert(TCP in syn_ack)
syn_ack = syn_ack[TCP]
assert(syn_ack.flags == "SA")
ack = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/TCP(flags="A", sport=sport, dport=dport, ack=syn_ack.seq + 1)
_ = iface.sr1(ack, timeout=1)
req = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/TCP(flags="PA", ack=syn_ack.seq + 1, sport=sport, dport=dport)/Raw(banner + b"\r\n")
resp = iface.sr1(req, timeout=1)
assert(resp is not None), "expecting answer, got nothing"
check_ipv6_checksum(resp)
assert(TCP in resp)
tcp = resp[TCP]
assert("A" in tcp.flags), "expecting ACK flag, not set (%r)" % tcp.flags
assert("P" in tcp.flags), "expecting PSH flag, not set (%r)" % tcp.flags
assert(len(tcp.payload) > 0), "expecting payload, got none"
assert(tcp.payload.load.startswith(b"SSH-2.0-")), "unexpected banner: %r" % tcp.payload.load
assert(tcp.payload.load.endswith(b"\r\n")), "unexpected banner: %r" % tcp.payload.load
@test
def test_ipv6_udp_ssh(iface):
sport = 37183
dports = [22, 80, 2222, 2022, 23874, 50000]
for i, dport in enumerate(dports):
banner = [b"SSH-2.0-AsyncSSH_2.1.0", b"SSH-2.0-PuTTY", b"SSH-2.0-libssh2_1.4.3", b"SSH-2.0-Go", b"SSH-2.0-PUTTY"][i % 5]
req = Ether(dst=MAC_ADDR)/IPv6(dst=IPV6_ADDR)/UDP(sport=sport, dport=dport)/Raw(banner + b"\r\n")
resp = iface.sr1(req, timeout=1)
assert(resp is not None), "expecting answer, got nothing"
check_ipv6_checksum(resp)
assert(UDP in resp)
udp = resp[UDP]
assert(len(udp.payload) > 0), "expecting payload, got none"
assert(udp.payload.load.startswith(b"SSH-2.0-")), "unexpected banner: %r" % udp.payload.load
assert(udp.payload.load.endswith(b"\r\n")), "unexpected banner: %r" % udp.payload.load
def test_all(iface):
global tests
# execute tests
for t in tests:
t(iface)

20
test/src/conf.py Normal file
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# This file is part of masscanned.
# Copyright 2021 - The IVRE project
#
# Masscanned is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Masscanned is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
# License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
IPV4_ADDR = "192.0.0.1"
IPV6_ADDR = "2001:41d0::ab32:bdb8"
MAC_ADDR = "52:1c:4e:c2:a4:1f"
OUTDIR = "test/res/"

78
test/test_masscanned.py Executable file
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#!/usr/bin/env python3
# This file is part of masscanned.
# Copyright 2021 - The IVRE project
#
# Masscanned is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Masscanned is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
# License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Masscanned. If not, see <http://www.gnu.org/licenses/>.
from scapy.all import *
from time import sleep
from tempfile import _get_candidate_names as gen_tmp_filename
from tempfile import gettempdir
import subprocess
import logging
import sys
import os
from src.all import test_all
from src.conf import *
# if args in CLI, they are passed to masscanned
if len(sys.argv) > 1:
args = " ".join(sys.argv[1:])
else:
args = ""
fmt = logging.Formatter("%(levelname)s\t%(message)s")
ch = logging.StreamHandler()
ch.setFormatter(fmt)
ch.setLevel(logging.INFO)
LOG = logging.getLogger(__name__)
LOG.setLevel(logging.INFO)
LOG.addHandler(ch)
conf.iface = 'tap0'
conf.verb = 0
# prepare configuration file for masscanned
ipfile = os.path.join(gettempdir(), next(gen_tmp_filename()))
with open(ipfile, "w") as f:
f.write("{}\n".format(IPV4_ADDR))
f.write("{}\n".format(IPV6_ADDR))
# create test interface
tap = TunTapInterface(resolve_iface(conf.iface))
# set interface
subprocess.run("ip a a dev {} 192.0.0.2".format(conf.iface), shell=True)
subprocess.run("ip link set {} up".format(conf.iface), shell=True)
# start capture
tcpdump = subprocess.Popen("tcpdump -enli {} -w {}".format(conf.iface, os.path.join(OUTDIR, "test_capture.pcap")), shell=True,
stdin=None, stdout=None, stderr=None, close_fds=True)
# run masscanned
masscanned = subprocess.Popen("RUST_BACKTRACE=1 ./target/debug/masscanned -vvvvv -i {} -f {} -a {} {}".format(conf.iface, ipfile, MAC_ADDR, args), shell=True,
stdin=None, stdout=open("test/res/masscanned.stdout", "w"), stderr=open("test/res/masscanned.stderr", "w"), close_fds=True)
sleep(1)
try:
test_all(tap)
except AssertionError:
pass
# terminate masscanned
masscanned.kill()
# terminate capture
sleep(2)
tcpdump.kill()