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9fd7816501
This makes it much easier for protocols where the mime type is known in advance like, for example, TLS. We now do no longer have to perform deep script-level magic.
90 lines
2.6 KiB
Text
90 lines
2.6 KiB
Text
@load base/frameworks/files
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@load base/files/hash
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module X509;
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export {
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redef enum Log::ID += { LOG };
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## The record type which contains the fields of the X.509 log.
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type Info: record {
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## Current timestamp.
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ts: time &log;
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## File id of this certificate.
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id: string &log;
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## Basic information about the certificate.
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certificate: X509::Certificate &log;
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## The opaque wrapping the certificate. Mainly used
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## for the verify operations.
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handle: opaque of x509;
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## All extensions that were encountered in the certificate.
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extensions: vector of X509::Extension &default=vector();
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## Subject alternative name extension of the certificate.
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san: X509::SubjectAlternativeName &optional &log;
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## Basic constraints extension of the certificate.
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basic_constraints: X509::BasicConstraints &optional &log;
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};
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## Event for accessing logged records.
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global log_x509: event(rec: Info);
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}
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event bro_init() &priority=5
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{
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Log::create_stream(X509::LOG, [$columns=Info, $ev=log_x509, $path="x509"]);
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Files::register_for_mime_type(Files::ANALYZER_X509, "application/x-x509-user-cert");
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Files::register_for_mime_type(Files::ANALYZER_X509, "application/x-x509-ca-cert");
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# Always calculate hashes. They are not necessary for base scripts
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# but very useful for identification, and required for policy scripts
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Files::register_for_mime_type(Files::ANALYZER_MD5, "application/x-x509-user-cert");
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Files::register_for_mime_type(Files::ANALYZER_MD5, "application/x-x509-ca-cert");
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Files::register_for_mime_type(Files::ANALYZER_SHA1, "application/x-x509-user-cert");
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Files::register_for_mime_type(Files::ANALYZER_SHA1, "application/x-x509-ca-cert");
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}
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redef record Files::Info += {
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## Information about X509 certificates. This is used to keep
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## certificate information until all events have been received.
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x509: X509::Info &optional;
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};
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event x509_certificate(f: fa_file, cert_ref: opaque of x509, cert: X509::Certificate) &priority=5
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{
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if ( ! f$info?$mime_type )
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f$info$mime_type = "application/pkix-cert";
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f$info$x509 = [$ts=f$info$ts, $id=f$id, $certificate=cert, $handle=cert_ref];
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}
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event x509_extension(f: fa_file, ext: X509::Extension) &priority=5
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{
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if ( f$info?$x509 )
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f$info$x509$extensions[|f$info$x509$extensions|] = ext;
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}
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event x509_ext_basic_constraints(f: fa_file, ext: X509::BasicConstraints) &priority=5
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{
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if ( f$info?$x509 )
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f$info$x509$basic_constraints = ext;
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}
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event x509_ext_subject_alternative_name(f: fa_file, ext: X509::SubjectAlternativeName) &priority=5
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{
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if ( f$info?$x509 )
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f$info$x509$san = ext;
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}
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event file_state_remove(f: fa_file) &priority=5
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{
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if ( ! f$info?$x509 )
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return;
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Log::write(LOG, f$info$x509);
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}
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