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Throw new event for heartbeat messages.

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Not tested.
This commit is contained in:
Bernhard Amann 2014-04-08 07:41:08 -07:00
parent 6b47350579
commit ffd4711a41
4 changed files with 31 additions and 0 deletions
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2
src/analyzer/protocol/ssl/events.bif
View file

@ -138,3 +138,5 @@ event ssl_alert%(c: connection, is_orig: bool, level: count, desc: count%);
## .. bro:see:: ssl_client_hello ssl_established ssl_extension ssl_server_hello
## ssl_alert
event ssl_session_ticket_handshake%(c: connection, ticket_lifetime_hint: count, ticket: string%);
event ssl_heartbeat%(c: connection, length: count%);

17
src/analyzer/protocol/ssl/ssl-analyzer.pac
View file

@ -306,6 +306,10 @@ refine connection SSL_Conn += {
function proc_ciphertext_record(rec : SSLRecord) : bool
%{
if ( ${rec.content_type} == HEARTBEAT )
BifEvent::generate_ssl_heartbeat(bro_analyzer(),
bro_analyzer()->Conn(), ${rec.length});
if ( state_ == STATE_TRACK_LOST )
bro_analyzer()->ProtocolViolation(fmt("unexpected ciphertext record from %s in state %s",
orig_label(${rec.is_orig}).c_str(),
@ -320,6 +324,15 @@ refine connection SSL_Conn += {
return true;
%}
function proc_heartbeat(rec : SSLRecord) : bool
%{
BifEvent::generate_ssl_heartbeat(bro_analyzer(),
bro_analyzer()->Conn(), ${rec.length});
return true;
%}
};
refine typeattr ChangeCipherSpec += &let {
@ -339,6 +352,10 @@ refine typeattr ApplicationData += &let {
proc : bool = $context.connection.proc_application_data(rec);
};
refine typeattr Heartbeat += &let {
proc : bool = $context.connection.proc_heartbeat(rec);
};
refine typeattr ClientHello += &let {
proc : bool = $context.connection.proc_client_hello(rec, client_version,
gmt_unix_time, random_bytes,

1
src/analyzer/protocol/ssl/ssl-defs.pac
View file

@ -12,6 +12,7 @@ enum ContentType {
ALERT = 21,
HANDSHAKE = 22,
APPLICATION_DATA = 23,
HEARTBEAT = 24,
V2_ERROR = 300,
V2_CLIENT_HELLO = 301,
V2_CLIENT_MASTER_KEY = 302,

11
src/analyzer/protocol/ssl/ssl-protocol.pac
View file

@ -63,6 +63,7 @@ type PlaintextRecord(rec: SSLRecord) = case rec.content_type of {
CHANGE_CIPHER_SPEC -> ch_cipher : ChangeCipherSpec(rec);
ALERT -> alert : Alert(rec);
HANDSHAKE -> handshake : Handshake(rec);
HEARTBEAT -> heartbeat: Heartbeat(rec);
APPLICATION_DATA -> app_data : ApplicationData(rec);
V2_ERROR -> v2_error : V2Error(rec);
V2_CLIENT_HELLO -> v2_client_hello : V2ClientHello(rec);
@ -225,6 +226,16 @@ type ApplicationData(rec: SSLRecord) = record {
data : bytestring &restofdata &transient;
};
######################################################################
# V3 Heartbeat
######################################################################
# Heartbeats should basically always be encrypted, so we should not
# reach this point.
type Heartbeat(rec: SSLRecord) = record {
data : bytestring &restofdata &transient;
};
######################################################################
# Handshake Protocol (7.4.)
######################################################################