[Bro-Dev] [JIRA] (BIT-1333) Bro's ASCII logging facilities do not escape escape characters
Robin Sommer (JIRA)
jira at bro-tracker.atlassian.net
Fri Apr 10 11:35:01 PDT 2015
[ https://bro-tracker.atlassian.net/browse/BIT-1333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=20253#comment-20253 ]
Robin Sommer commented on BIT-1333:
-----------------------------------
Needs code review, probably not working quite right, messes up the test-suite.
> 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
> Assignee: Seth Hall
> Fix For: 2.4
>
>
> * 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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