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Add very basic ocsp stapling support.

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This only allows access to the ocsp stapling response data. No verification
or anything else at the moment.
This commit is contained in:
Bernhard Amann 2014-04-24 12:36:05 -07:00
parent 9b7eb293f1
commit c24629abf4
7 changed files with 41 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

14
src/analyzer/protocol/ssl/events.bif
View file

@ -214,6 +214,8 @@ event ssl_session_ticket_handshake%(c: connection, ticket_lifetime_hint: count,
##
## c: The connection.
##
## is_orig: True if event is raised for originator side of the connection.
##
## length: length of the entire heartbeat message.
##
## heartbeat_type: type of the heartbeat message. Per RFC, 1 = request, 2 = response
@ -236,9 +238,21 @@ event ssl_heartbeat%(c: connection, is_orig: bool, length: count, heartbeat_type
##
## c: The connection.
##
## is_orig: True if event is raised for originator side of the connection.
##
## length: length of the entire heartbeat message.
##
## .. bro:see:: ssl_client_hello ssl_established ssl_extension ssl_server_hello
## ssl_alert ssl_heartbeat
event ssl_encrypted_heartbeat%(c: connection, is_orig: bool, length: count%);
## This event contains the OCSP response contained in a Certificate Status Request
## message, when the client requested OCSP stapling and the server supports it. See
## description in :rfc:`6066`
##
## c: The connection.
##
## is_orig: True if event is raised for originator side of the connection.
##
## response: OCSP data.
event ssl_stapled_ocsp%(c: connection, is_orig: bool, response: string%);

15
src/analyzer/protocol/ssl/ssl-analyzer.pac
View file

@ -389,6 +389,17 @@ refine connection SSL_Conn += {
return true;
%}
function proc_certificate_status(rec : SSLRecord, status_type: uint8, response: bytestring) : bool
%{
if ( status_type == 1 ) // ocsp
{
BifEvent::generate_ssl_stapled_ocsp(bro_analyzer(),
bro_analyzer()->Conn(), ${rec.is_orig},
new StringVal(response.length(), (const char*) response.data()));
}
return true;
%}
};
refine typeattr Alert += &let {
@ -473,3 +484,7 @@ refine typeattr ApplicationLayerProtocolNegotiationExtension += &let {
refine typeattr ServerNameExt += &let {
proc : bool = $context.connection.proc_server_name(rec, server_names);
};
refine typeattr CertificateStatus += &let {
proc : bool = $context.connection.proc_certificate_status(rec, status_type, response);
};

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

@ -341,6 +341,7 @@ type Certificate(rec: SSLRecord) = record {
type CertificateStatus(rec: SSLRecord) = record {
status_type: uint8; # 1 = ocsp, everything else is undefined
length : uint24;
response: bytestring &restofdata;
};