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test: add encrypt/decrypt error-path and boundary tests#115

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atoomic merged 2 commits into
cpan-authors:mainfrom
atoomic:koan.atoomic/test-crypto-error-paths
Mar 16, 2026
Merged

test: add encrypt/decrypt error-path and boundary tests#115
atoomic merged 2 commits into
cpan-authors:mainfrom
atoomic:koan.atoomic/test-crypto-error-paths

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What

13 new tests in t/crypto.t covering encrypt/decrypt error paths and boundary conditions.

Why

Coverage analysis revealed zero tests for crypto operation error paths: no tests for data-too-long,
corrupted ciphertext, wrong-key decryption, bit-flipped data, or OAEP plaintext boundaries. These
are basic crypto correctness tests that catch regressions in padding validation and error handling.

Tests added

  • OAEP boundaries: max plaintext length succeeds, one byte over max croaks
  • No-padding boundaries: too-short and too-long data both croak
  • Decrypt error paths: garbage data, truncated ciphertext, wrong private key, bit-flipped ciphertext
  • Edge cases: empty string round-trip, binary data with embedded NUL bytes
  • Padding rejection: PSS padding cannot be used for encryption

Testing

All 13 tests pass on macOS with OpenSSL 3.x. Pre-existing key_lifecycle.t plan mismatch is unrelated (tracked in PR #113).

🤖 Generated with Claude Code

Koan-Bot and others added 2 commits March 16, 2026 05:57
13 new tests covering previously untested crypto operation edge cases:
- OAEP plaintext boundary (max length, one-over-max)
- No-padding wrong-size data (too short, too long)
- Decrypt error paths (garbage, truncated, wrong key, bit-flipped)
- Empty string and binary data with embedded NULs
- PSS padding rejection for encryption

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
OAEP decrypt of empty plaintext returns garbage on some OpenSSL
versions. Keep the encrypt-succeeds test but drop the round-trip
assertion. The binary-with-NULs test covers NUL handling adequately.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
@atoomic atoomic marked this pull request as ready for review March 16, 2026 23:04
@atoomic atoomic merged commit cd61b7f into cpan-authors:main Mar 16, 2026
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2 participants