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FileAnalysis: add logging, file_analysis.log.

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This commit is contained in:
Jon Siwek 2013-03-20 13:31:11 -05:00
parent 1ef7465e30
commit 7034785810
3 changed files with 169 additions and 3 deletions
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99
testing/btest/scripts/base/frameworks/file-analysis/logging.bro Normal file
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# @TEST-EXEC: bro -r $TRACES/http/get.trace %INPUT
# @TEST-EXEC: btest-diff file_analysis.log
global actions: set[FileAnalysis::ActionArgs];
event file_chunk(info: FileAnalysis::Info, data: string, off: count)
{
print "file_chunk", info$file_id, |data|, off, data;
}
event file_stream(info: FileAnalysis::Info, data: string)
{
print "file_stream", info$file_id, |data|, data;
}
hook FileAnalysis::policy(trig: FileAnalysis::Trigger, info: FileAnalysis::Info)
{
print trig;
switch ( trig ) {
case FileAnalysis::TRIGGER_NEW:
print info$file_id, info$seen_bytes, info$missing_bytes;
if ( info$source == "HTTP" )
{
for ( act in actions )
FileAnalysis::add_action(info$file_id, act);
local filename: string = fmt("%s-file", info$file_id);
FileAnalysis::add_action(info$file_id,
[$act=FileAnalysis::ACTION_EXTRACT,
$extract_filename=filename]);
FileAnalysis::add_action(info$file_id,
[$act=FileAnalysis::ACTION_DATA_EVENT,
$chunk_event=file_chunk,
$stream_event=file_stream]);
}
break;
case FileAnalysis::TRIGGER_BOF_BUFFER:
if ( info?$bof_buffer )
print info$bof_buffer[0:10];
break;
case FileAnalysis::TRIGGER_TYPE:
# not actually printing the values due to libmagic variances
if ( info?$file_type )
print "file type is set";
if ( info?$mime_type )
print "mime type is set";
break;
case FileAnalysis::TRIGGER_EOF:
fallthrough;
case FileAnalysis::TRIGGER_DONE:
print info$file_id, info$seen_bytes, info$missing_bytes;
print info$conn_uids;
print info$conn_ids;
if ( info?$total_bytes )
print "total bytes: " + fmt("%s", info$total_bytes);
if ( info?$source )
print "source: " + info$source;
for ( act in info$actions )
switch ( act$act ) {
case FileAnalysis::ACTION_MD5:
print fmt("MD5: %s", info$actions[act]$md5);
break;
case FileAnalysis::ACTION_SHA1:
print fmt("SHA1: %s", info$actions[act]$sha1);
break;
case FileAnalysis::ACTION_SHA256:
print fmt("SHA256: %s", info$actions[act]$sha256);
break;
}
break;
}
}
hook FileAnalysis::policy(trig: FileAnalysis::Trigger, info: FileAnalysis::Info)
&priority=-5
{
if ( trig != FileAnalysis::TRIGGER_TYPE ) return;
# avoids libmagic variances across systems
if ( info?$mime_type )
info$mime_type = "set";
if ( info?$file_type )
info$file_type = "set";
}
event bro_init()
{
add actions[[$act=FileAnalysis::ACTION_MD5]];
add actions[[$act=FileAnalysis::ACTION_SHA1]];
add actions[[$act=FileAnalysis::ACTION_SHA256]];
}