Additional fixes for block ciphers in TLS connections#145
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Worth documenting that this part is optional based on Refers to: SymCryptProvider/src/ciphers/p_scossl_aes.c:154 in 1640b26. [](commit_id = 1640b26, deletion_comment = False) |
samuel-lee-msft
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LGTM modulo comments
samuel-lee-msft
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Jan 26, 2026
* Allow optional mac in TLS block decrypt * Fix issue found for TLSv1 connections * Bump minor version * Add comments describing etm behavior
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* Allow optional mac in TLS block decrypt * Fix issue found for TLSv1 connections * Bump minor version * Add comments describing etm behavior
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…SL versions (#159) * Additional fixes for block ciphers in TLS connections (#145) * Allow optional mac in TLS block decrypt * Fix issue found for TLSv1 connections * Bump minor version * Add comments describing etm behavior * Bugfixes for 1.9 (#150) * Add OSSL_SIGNATURE_PARAM_NONCE_TYPE to ECDSA signature * Only optimize debug release builds * Only export EC public/private if available * Fix HMAC dupctx * Bump version to 1.9.4 * Add goto cleanup * Allow MAC context duplication for partially initialized contexts (#156) * Fix context duplication for partially initialized mac contexts * Check mac state in init * Fix error messages * Fix compilation * Add missing parameter on older versions * Fix errors in OpenSSL 3.0 builds * Use dummy OID on older versions for ml-kem composite * Use valid dummy OID
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This PR fixes a regression where encrypt-then-mac was failing with block ciphers provided by the symcrypt provider. When ETM is used, the mac size passed to the provider is 0. Instead of removing the padding and skipping mac extraction, the SymCrypt provider treated a zero-mac length as invalid and failed before removing padding.
This PR also fixes a corner case issue when the SymCrypt provider is used with TLSv1, where an empty block was passed for encryption, and the caller expected an encrypted block of padding bytes.