tests: Fix config parsing divergences found by the differential fuzzer

nikhil-narirequested to merge
nikhil-nari/libssh-mirror:config-differential-fuzzer into master

This merge request fixes the bugs found by the fuzzer.

Commit 1: Lowercases hostname

Commit 2: Normalizes a loose IPv4 string (e.g. "0", "127.1") to dotted-quad format

Commit 3: Lowercases implicit hostname values

Commit 4: Rejects invalid suffixes for boolean options(e.g., PasswordAuthentication yesabc) and adds support for true/false aliases

Commit 5: Allows lowercase suffixes for rekeylimit and ignores invalid trailing characters

Checklist

  • Commits have Signed-off-by: with name/author being identical to the commit author
  • Code modified for feature
  • Test suite updated with functionality tests
  • Test suite updated with negative tests
  • Documentation updated
  • The project pipelines timeout is extended at least to 2 hours.

Reviewer's checklist:

  • Any issues marked for closing are addressed
  • There is a test suite reasonably covering new functionality or modifications
  • Function naming, parameters, return values, types, etc., are consistent and according to CONTRIBUTING.md
  • This feature/change has adequate documentation added
  • No obvious mistakes in the code
Edited by nikhil-nari

Merge request reports