Disallow matching URI type in CheckForAltNames. NULL *response on error in wolfSSL_d2i_OCSP_RESPONSE.#10509
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Pull request overview
This PR addresses two certificate/OCSP edge cases: (1) TLS hostname matching should not treat URI SANs as DNSName SANs, and (2) wolfSSL_d2i_OCSP_RESPONSE() should NULL out a caller-supplied *response on failure to avoid leaving a dangling pointer.
Changes:
- Update
CheckForAltNames()to skipuniformResourceIdentifierSANs when performing DNS hostname checks. - Update
wolfSSL_d2i_OCSP_RESPONSE()error paths to clear*responsewhen the caller passed a reusable response pointer. - Add regression tests covering URI SAN hostname-matching behavior and OCSP response reuse failure semantics.
Reviewed changes
Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.
Show a summary per file
| File | Description |
|---|---|
wolfcrypt/src/asn.c |
Updates in-code documentation clarifying URI SAN handling vs CN fallback behavior. |
src/internal.c |
Skips URI SAN entries during DNS hostname matching in CheckForAltNames(). |
src/ocsp.c |
Clears caller’s *response on allocation/decode failures in wolfSSL_d2i_OCSP_RESPONSE(). |
tests/api/test_ocsp.c |
Adds a test to ensure *response is NULLed on reuse + decode failure. |
tests/api/test_certman.h |
Registers a new certman API test. |
tests/api/test_certman.c |
Adds a test ensuring URI SANs don’t satisfy DNS hostname checks (and validates behavior when DNS SAN is also present). |
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The changes look good. Thank you for the prompt response. |
julek-wolfssl
requested changes
May 27, 2026
Thanks to Haruki Oyama (Waseda University) for the report.
Thanks to Zou Dikai for the report.
Remove outdated RFC, refactor into single error case, guard against negative/0 len and NULL *data pointer, don't set ownStatus until status is confirmed non-NULL.
julek-wolfssl
approved these changes
May 29, 2026
JacobBarthelmeh
approved these changes
May 29, 2026
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Description
Fixes zd#21863, zd#21865
Testing
Built in tests, provided reproducers
Checklist