This commit changes the SSL and X.509 logging formats to something that,
hopefully, slowly approaches what they will look like in the future.
X.509 log is not yet deduplicated; this will come in the future.
This commit introduces two new options, which determine if certificate
issuers and subjects are still logged in ssl.log. The default is to have
the host subject/issuer logged, but to remove client-certificate
information. Client-certificates are not a typically used feature
nowadays.
* 'master' of https://github.com/mmguero-dev/zeek:
check for the existance of f?$conns in file_sniff event in policy/protocols/ssl/log-hostcerts-only.zeek
In using the corelight/bro-xor-exe-plugin (https://github.com/corelight/bro-xor-exe-plugin) I noticed this error when running the PCAP trace file in its tests directory:
1428602842.525435 expression error in /opt/zeek/share/zeek/policy/protocols/ssl/log-hostcerts-only.zeek, line 44: field value missing (X509::f$conns)
Examining log-hostcerts-only.zeek, I saw that although f$conns is being checked for length, it's not being checked to see if it exists first.
This commit changes "if ( |f$conns| != 1 )" to "if (( ! f?$conns ) || ( |f$conns| != 1 ))" so that the script returns if there is no f$conns field.
In my local testing, this seems to fix the error. My testing was being done with v3.0.5, but I think this patch can be applied to both the 3.0.x and 3.1.x branches.
