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Allow hardcoding single supported elliptic curve

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This commit introduces the option MBEDTLS_SSL_CONF_SINGLE_EC
which can be used to register a single supported elliptic curve
at compile time. It replaces the runtime configuration API
mbedtls_ssl_conf_curves() which allows to register a _list_
of supported elliptic curves.

In contrast to other options used to hardcode configuration options,
MBEDTLS_SSL_CONF_SINGLE_EC isn't a numeric option, but instead it's
only relevant if it's defined or not. To actually set the single
elliptic curve that should be supported, numeric options

MBEDTLS_SSL_CONF_SINGLE_EC_TLS_ID
MBEDTLS_SSL_CONF_SINGLE_EC_GRP_ID

must both be defined and provide the TLS ID and the Mbed TLS internal
ID and the chosen curve, respectively.
This commit is contained in:
Hanno Becker 2019-06-19 12:30:41 +01:00
parent ee24f8cecb
commit c1096e7514
9 changed files with 116 additions and 11 deletions
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24
programs/ssl/query_config.c
View file

@ -2778,6 +2778,30 @@ int query_config( const char *config )
}
#endif /* MBEDTLS_SSL_CONF_SINGLE_CIPHERSUITE */
#if defined(MBEDTLS_SSL_CONF_SINGLE_EC)
if( strcmp( "MBEDTLS_SSL_CONF_SINGLE_EC", config ) == 0 )
{
MACRO_EXPANSION_TO_STR( MBEDTLS_SSL_CONF_SINGLE_EC );
return( 0 );
}
#endif /* MBEDTLS_SSL_CONF_SINGLE_EC */
#if defined(MBEDTLS_SSL_CONF_SINGLE_EC_TLS_ID)
if( strcmp( "MBEDTLS_SSL_CONF_SINGLE_EC_TLS_ID", config ) == 0 )
{
MACRO_EXPANSION_TO_STR( MBEDTLS_SSL_CONF_SINGLE_EC_TLS_ID );
return( 0 );
}
#endif /* MBEDTLS_SSL_CONF_SINGLE_EC_TLS_ID */
#if defined(MBEDTLS_SSL_CONF_SINGLE_EC_GRP_ID)
if( strcmp( "MBEDTLS_SSL_CONF_SINGLE_EC_GRP_ID", config ) == 0 )
{
MACRO_EXPANSION_TO_STR( MBEDTLS_SSL_CONF_SINGLE_EC_GRP_ID );
return( 0 );
}
#endif /* MBEDTLS_SSL_CONF_SINGLE_EC_GRP_ID */
/* If the symbol is not found, return an error */
return( 1 );
}