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Add keyword to match on 'raw' TLS certificates #3542

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Add keyword to match on 'raw' TLS certificates #3542

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88bd8cb
detect: add tls_cert keyword
thus Nov 13, 2018
22a2fe7
userguide: add documentation for tls_cert keyword
thus Nov 13, 2018
57bfa54
detect-tls: rename buffer type to avoid conflict
thus Nov 14, 2018
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15 changes: 15 additions & 0 deletions doc/userguide/rules/tls-keywords.rst
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Expand Up @@ -116,6 +116,21 @@ Usage::

tls_cert_valid;

tls_cert
--------

Do a "raw" match on the TLS certificate. This keyword only matches on the
first certificate in the certificate chain.

Example::

alert tls any any -> any any (msg:"match bytes in TLS cert"; tls_cert; \
content:"|06||09||2a||86|"; sid:200070;)

``tls_cert`` is a 'Sticky buffer'.

``tls_cert`` can be used as ``fast_pattern``.

tls.version
-----------

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1 change: 1 addition & 0 deletions src/Makefile.am
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Expand Up @@ -114,6 +114,7 @@ detect-tls-cert-issuer.c detect-tls-cert-issuer.h \
detect-tls-cert-subject.c detect-tls-cert-subject.h \
detect-tls-cert-serial.c detect-tls-cert-serial.h \
detect-tls-cert-fingerprint.c detect-tls-cert-fingerprint.h \
detect-tls-cert.c detect-tls-cert.h \
detect-dsize.c detect-dsize.h \
detect-engine.c detect-engine.h \
detect-engine-address.c detect-engine-address.h \
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2 changes: 2 additions & 0 deletions src/detect-engine-register.c
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Expand Up @@ -48,6 +48,7 @@
#include "detect-engine-uri.h"
#include "detect-dns-query.h"
#include "detect-tls-sni.h"
#include "detect-tls-cert.h"
#include "detect-tls-cert-fingerprint.h"
#include "detect-tls-cert-issuer.h"
#include "detect-tls-cert-subject.h"
Expand Down Expand Up @@ -432,6 +433,7 @@ void SigTableSetup(void)
DetectTlsSubjectRegister();
DetectTlsSerialRegister();
DetectTlsFingerprintRegister();
DetectTlsCertRegister();

DetectTlsJa3HashRegister();
DetectTlsJa3StringRegister();
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1 change: 1 addition & 0 deletions src/detect-engine-register.h
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Expand Up @@ -176,6 +176,7 @@ enum {

DETECT_AL_DNS_QUERY,
DETECT_AL_TLS_SNI,
DETECT_AL_TLS_CERT,
DETECT_AL_TLS_CERT_ISSUER,
DETECT_AL_TLS_CERT_SUBJECT,
DETECT_AL_TLS_CERT_SERIAL,
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