Paul Pearce created BIT-1333:
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Summary: Bro's ASCII logging facilities do not escape escape
characters
Key: BIT-1333
URL: https://bro-tracker.atlassian.net/browse/BIT-1333
Project: Bro Issue Tracker
Issue Type: Problem
Components: Bro
Affects Versions: 2.3
Reporter: Paul Pearce
* Bro escapes non-printable ASCII characters with either \x?? or ^ depending on
the character
(https://www.bro.org/sphinx/scripts/base/bif/strings.bif.bro.html).
* Bro does not however escape \ or ^.
* This behavior makes recovering the original string impossible as you can not
differentiate between an escaped sequence and a string containing those
characters.
Examples:
$ bro -e 'event bro_init() { print "foo \xc2\xae bar \\xc2\\xae baz"; }'
foo \xc2\xae bar \xc2\xae baz
$ bro -e 'event bro_init() { print "foo\x00bar\\0baz"; }'
foo\0bar\0baz
$ bro -e 'event bro_init() { print "foo \16 bar ^N baz"; }'
foo ^N bar ^N baz
Additionally, it would be ideal if there was a way to standardize escaping to a
single syntax (\x?? for all, for example). This would allow post-processing of
the bro logs in languages like Python or Ruby trivially using existing
decode/encode functionality. I'm happy to file a separate feature request for
this behavior, if that is preferred.
I brought this up on the mailing list
(http://mailman.icsi.berkeley.edu/pipermail/bro/2015-February/008174.html). It
was suggested (off list) that I file a ticket as well.
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