mirror of
https://github.com/zeek/zeek.git
synced 2025-10-02 06:38:20 +00:00
56b9a79a65
Like traditional file analyzers, we now query Zeek's `get_file_handle()` event for handles when a connection begins analyzing an embedded file. That means that Spicy-side protocol analyzers that are forwarding data into file analysis now need to call Zeek's `Files::register_protocol()` and provide a callback for computing file handles. If that's missing, Zeek will now issue a warning. This aligns with the requirements Zeek's traditional protocol analyzers. (If the EVT file defines a protocol analyzer to `replace` an existing one, that one's `register_protocol()` will be consulted.) Because Zeek's `get_file_handle()` event requires a current connection, if a Spicy file analyzer isn't directly part of a connection context (e.g., with nested files), we continue to use hardcoded, built-in file handle. Scriptland won't be consulted in that case, just like before. Closes #3440.
60 lines
2.8 KiB
Text
60 lines
2.8 KiB
Text
# @TEST-REQUIRES: have-spicy
|
|
#
|
|
# @TEST-EXEC: spicyz -d -o test.hlto ssh.spicy ./ssh-cond.evt
|
|
# @TEST-EXEC: zeek -r ${TRACES}/ssh/single-conn.trace test.hlto %INPUT Spicy::enable_print=T 2>&1 | sort >output
|
|
#
|
|
# @TEST-EXEC: cat x509.log | grep -v ^# | cut -f 4-5 >x509.log.tmp && mv x509.log.tmp x509.log
|
|
# @TEST-EXEC: btest-diff x509.log
|
|
# @TEST-EXEC: btest-diff output
|
|
|
|
module SSH;
|
|
|
|
function get_file_handle(c: connection, is_orig: bool): string
|
|
{
|
|
return cat(c$uid);
|
|
}
|
|
|
|
event zeek_init()
|
|
{
|
|
Analyzer::register_for_port(Analyzer::ANALYZER_SPICY_SSH, 22/tcp);
|
|
Files::register_protocol(Analyzer::ANALYZER_SSH, [$get_file_handle=SSH::get_file_handle]); # use tag of replaced analyzer
|
|
|
|
}
|
|
|
|
# @TEST-START-FILE ssh.spicy
|
|
module SSH;
|
|
|
|
import spicy;
|
|
import zeek;
|
|
|
|
|
|
public type Banner = unit {
|
|
magic : /SSH-/;
|
|
version : /[^-]*/;
|
|
dash : /-/;
|
|
software: /[^\r\n]*/;
|
|
};
|
|
|
|
# this is a bit of cheating...
|
|
|
|
on Banner::%done {
|
|
local d: spicy::Base64Stream;
|
|
local dec : bytes = spicy::base64_decode(d, b"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");
|
|
dec += spicy::base64_finish(d);
|
|
local id = zeek::file_begin("application/x-x509-ca-cert");
|
|
print id;
|
|
zeek::file_data_in_at_offset(dec, 0);
|
|
zeek::file_end();
|
|
}
|
|
|
|
# @TEST-END-FILE
|
|
|
|
# @TEST-START-FILE ssh-cond.evt
|
|
|
|
import zeek;
|
|
|
|
protocol analyzer spicy::SSH over TCP:
|
|
parse with SSH::Banner,
|
|
replaces SSH;
|
|
|
|
# @TEST-END-FILE
|