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detect: add keywords for LDAPResult - v3 #12691

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AkakiAlice
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Ticket: #7532

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Changes (if applicable):

Link to ticket: https://redmine.openinfosecfoundation.org/issues/7532

Description:

  • Implement keywords ldap.responses.result_code and ldap.responses.message

Changes:

  • Add reference for result code values https://ldap.com/ldap-result-code-reference/ in the doc
  • Resolve doc nits
  • Create function parse_ldap_index to parse LdapIndex
  • Create generic function match_at_index to match integer responses with index
  • Change keyword name ldap.responses.error_message->ldap.responses.message to match with json schema
  • Return an empty buffer in function ldap_tx_get_responses_msg when a response doesn't have a message
  • Change variable name 'req' to 'resp' in function ldap_tx_get_responses_dn

SV_BRANCH=OISF/suricata-verify#2310
Previous PR: #12583

Split code to create a generic function that parses LdapIndex
ldap.responses.result_code matches on LDAP result code
This keyword maps the following eve fields:
ldap.responses[].bind_response.result_code
ldap.responses[].search_result_done.result_code
ldap.responses[].modify_response.result_code
ldap.responses[].add_response.result_code
ldap.responses[].del_response.result_code
ldap.responses[].mod_dn_response.result_code
ldap.responses[].compare_response.result_code
ldap.responses[].extended_response.result_code
It is an unsigned 32-bit integer
Doesn't support prefiltering

Ticket: OISF#7532
ldap.responses.message matches on LDAPResult error message
This keyword maps the following eve fields:
ldap.responses[].bind_response.message
ldap.responses[].search_result_done.message
ldap.responses[].modify_response.message
ldap.responses[].add_response.message
ldap.responses[].del_response.message
ldap.responses[].mod_dn_response.message
ldap.responses[].compare_response.message
ldap.responses[].extended_response.message
It is a sticky buffer
Supports prefiltering

Ticket: OISF#7532
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codecov bot commented Feb 28, 2025

Codecov Report

Attention: Patch coverage is 81.90955% with 36 lines in your changes missing coverage. Please review.

Project coverage is 80.70%. Comparing base (0dc5b72) to head (0817ccb).

Additional details and impacted files
@@            Coverage Diff             @@
##           master   #12691      +/-   ##
==========================================
- Coverage   80.71%   80.70%   -0.02%     
==========================================
  Files         936      936              
  Lines      259425   259511      +86     
==========================================
+ Hits       209399   209427      +28     
- Misses      50026    50084      +58     
Flag Coverage Δ
fuzzcorpus 56.95% <17.58%> (-0.01%) ⬇️
livemode 19.43% <17.58%> (+0.01%) ⬆️
pcap 44.20% <19.09%> (-0.01%) ⬇️
suricata-verify 63.48% <81.90%> (-0.03%) ⬇️
unittests 58.20% <17.58%> (+<0.01%) ⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

@AkakiAlice
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Replaced by: #12694

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