x509: fix reading of MGF-1 OID
- x509: fix reading of MGF-1 OID
asn1_read_value may return error code in a positive integer thus the previous code could lead to an access to uninitialized value. This is a regression in the RSA-OAEP support. Spotted by oss-fuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=67300
Signed-off-by: Daiki Ueno ueno@gnu.org
Checklist
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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 / NEWS entry present (for non-trivial changes) -
CI timeout is 2h or higher (see Settings/CICD/General pipelines/Timeout)
Reviewer's checklist:
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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 CONTRIBUTION.md
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This feature/change has adequate documentation added -
No obvious mistakes in the code
Edited by Daiki Ueno