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PSA: allow the configuration to favor HMAC_DRBG

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Allow the user to configure PSA to use HMAC_DRBG even if CTR_DRBG is
available, or to explicitly select the hash algorithm to use for
HMAC_DRBG, by setting MBEDTLS_PSA_HMAC_DRBG_MD_TYPE in config.h.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2020-11-13 21:33:21 +01:00
parent 82e57d1611
commit ed03890281
2 changed files with 22 additions and 0 deletions
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14
include/mbedtls/config.h
View File

@ -3635,6 +3635,20 @@
*/
//#define MBEDTLS_PARAM_FAILED( cond ) assert( cond )
/* PSA options */
/** \def MBEDTLS_PSA_HMAC_DRBG_MD_TYPE
*
* Use HMAC_DRBG with the specified hash algorithm for HMAC_DRBG for the
* PSA crypto subsystem.
*
* If this option is unset:
* - If CTR_DRBG is available, the PSA subsystem uses it rather than HMAC_DRBG.
* - Otherwise, the PSA subsystem uses one HMAC_DRBG with of
* #MBEDTLS_MD_SHA512 or #MBEDTLS_MD_SHA256 based on availability and
* on unspecified heuristics.
*/
//#define MBEDTLS_PSA_HMAC_DRBG_MD_TYPE MBEDTLS_MD_SHA256
/* SSL Cache options */
//#define MBEDTLS_SSL_CACHE_DEFAULT_TIMEOUT 86400 /**< 1 day */
//#define MBEDTLS_SSL_CACHE_DEFAULT_MAX_ENTRIES 50 /**< Maximum entries in cache */

8
programs/test/query_config.c
View File

@ -2616,6 +2616,14 @@ int query_config( const char *config )
}
#endif /* MBEDTLS_PLATFORM_NV_SEED_WRITE_MACRO */
#if defined(MBEDTLS_PSA_HMAC_DRBG_MD_TYPE)
if( strcmp( "MBEDTLS_PSA_HMAC_DRBG_MD_TYPE", config ) == 0 )
{
MACRO_EXPANSION_TO_STR( MBEDTLS_PSA_HMAC_DRBG_MD_TYPE );
return( 0 );
}
#endif /* MBEDTLS_PSA_HMAC_DRBG_MD_TYPE */
#if defined(MBEDTLS_SSL_CACHE_DEFAULT_TIMEOUT)
if( strcmp( "MBEDTLS_SSL_CACHE_DEFAULT_TIMEOUT", config ) == 0 )
{