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mbedtls_pk_decrypt/encrypt actually check the padding mode

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The sign/verify functions happily use the wrong algorithm, but the
encrypt/decrypt functions error out if the padding mode specifies V21.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2024-03-11 18:49:54 +01:00
parent 9cc01ccbf8
commit 88c2755a30
1 changed files with 4 additions and 3 deletions
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7
ChangeLog.d/8824.txt
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@ -1,7 +1,8 @@
Bugfix Bugfix
* Fix mbedtls_pk_sign(), mbedtls_pk_verify(), mbedtls_pk_decrypt() and * Fix mbedtls_pk_sign(), mbedtls_pk_verify(), mbedtls_pk_decrypt() and
mbedtls_pk_encrypt() on non-opaque RSA keys to honor the padding mode in mbedtls_pk_encrypt() on non-opaque RSA keys to honor the padding mode in
the RSA context. Before, if MBEDTLS_USE_PSA_CRYPTO was enabled, they always the RSA context. Before, if MBEDTLS_USE_PSA_CRYPTO was enabled and the
used PKCS#1 v1.5 even when the RSA context was configured for PKCS#1 v2.1 RSA context was configured for PKCS#1 v2.1 (PSS/OAEP), the sign/verify
(PSS/OAEP). Fixes #8824. functions performed a PKCS#1 v1.5 signature instead and the
encrypt/decrypt functions returned an error. Fixes #8824.