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Avoid using restartable and alternative ECP imp.

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1. Add a check that MBEDTLS_ECP_RESTARTABLE is not defined
   along any EC* alternative implementation.
2. Add a closing comment foran `#endif`.
This commit is contained in:
Ron Eldor 2018-11-05 14:04:26 +02:00
parent 2b161c33be
commit 5ed8c1eded
3 changed files with 15 additions and 2 deletions
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10
include/mbedtls/check_config.h
View file

@ -108,6 +108,16 @@
#error "MBEDTLS_ECJPAKE_C defined, but not all prerequisites"
#endif
#if defined(MBEDTLS_ECP_RESTARTABLE) && \
( defined(MBEDTLS_ECDH_COMPUTE_SHARED_ALT) || \
defined(MBEDTLS_ECDH_GEN_PUBLIC_ALT) || \
defined(MBEDTLS_ECDSA_SIGN_ALT) || \
defined(MBEDTLS_ECDSA_VERIFY_ALT) || \
defined(MBEDTLS_ECDSA_GENKEY_ALT) || \
defined(MBEDTLS_ECP_ALT) )
#error "MBEDTLS_ECP_RESTARTABLE defined, but it cannot coexist with an alternative ECP implementation"
#endif
#if defined(MBEDTLS_ECDSA_DETERMINISTIC) && !defined(MBEDTLS_HMAC_DRBG_C)
#error "MBEDTLS_ECDSA_DETERMINISTIC defined, but not all prerequisites"
#endif

3
include/mbedtls/config.h
View file

@ -694,6 +694,9 @@
* for too long on ECC (and, hence, X.509 or SSL/TLS) operations.
*
* Uncomment this macro to enable restartable ECC computations.
*
* \note MBEDTLS_ECP_RESTARTABLE cannot be defined if there is an alternative
* implementation for one of the ECP, ECDSA or ECDH functions. *
*/
//#define MBEDTLS_ECP_RESTARTABLE

2
library/ecdsa.c
View file

@ -638,7 +638,7 @@ int mbedtls_ecdsa_write_signature_restartable( mbedtls_ecdsa_context *ctx,
MBEDTLS_MPI_CHK( ecdsa_sign_restartable( &ctx->grp, &r, &s, &ctx->d,
hash, hlen, f_rng, p_rng, rs_ctx ) );
#endif /* MBEDTLS_ECDSA_SIGN_ALT */
#endif
#endif /* MBEDTLS_ECDSA_DETERMINISTIC */
MBEDTLS_MPI_CHK( ecdsa_signature_to_asn1( &r, &s, sig, slen ) );