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Merge pull request #8279 from gilles-peskine-arm/mbedtls_ecdsa_can_do

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Backport 2.28: Bug Fix: mbedtls_ecdsa_verify_restartable fails with ECDSA_SIGN_ALT
This commit is contained in:
Dave Rodgman
2023-09-29 13:11:43 +00:00
committed by GitHub
parent dce82cd914 3ead877b68
commit 8c28032537
2 changed files with 16 additions and 13 deletions
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ChangeLog.d/mbedtls_ecdsa_can_do-unconditional-define.txt
+3
View File
@@ -0,0 +1,3 @@
Bugfix
* Fix an error when MBEDTLS_ECDSA_SIGN_ALT is defined but not
MBEDTLS_ECDSA_VERIFY_ALT, causing ecdsa verify to fail. Fixes #7498.
library/ecdsa.c
+13 -13
View File
@@ -240,6 +240,19 @@ cleanup:
}
#endif /* ECDSA_DETERMINISTIC || !ECDSA_SIGN_ALT || !ECDSA_VERIFY_ALT */
int mbedtls_ecdsa_can_do(mbedtls_ecp_group_id gid)
{
switch (gid) {
#ifdef MBEDTLS_ECP_DP_CURVE25519_ENABLED
case MBEDTLS_ECP_DP_CURVE25519: return 0;
#endif
#ifdef MBEDTLS_ECP_DP_CURVE448_ENABLED
case MBEDTLS_ECP_DP_CURVE448: return 0;
#endif
default: return 1;
}
}
#if !defined(MBEDTLS_ECDSA_SIGN_ALT)
/*
* Compute ECDSA signature of a hashed message (SEC1 4.1.3)
@@ -379,19 +392,6 @@ cleanup:
return ret;
}
int mbedtls_ecdsa_can_do(mbedtls_ecp_group_id gid)
{
switch (gid) {
#ifdef MBEDTLS_ECP_DP_CURVE25519_ENABLED
case MBEDTLS_ECP_DP_CURVE25519: return 0;
#endif
#ifdef MBEDTLS_ECP_DP_CURVE448_ENABLED
case MBEDTLS_ECP_DP_CURVE448: return 0;
#endif
default: return 1;
}
}
/*
* Compute ECDSA signature of a hashed message
*/