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The default ECDH curve list will be dynamically built in the ecp module based on ecp_supported_curves[].

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This commit is contained in:
Gergely Budai
2014-01-22 11:22:20 +01:00
committed by Manuel Pégourié-Gonnard
parent de05390c85
commit e40c469ad3
3 changed files with 42 additions and 50 deletions
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43
library/ecp.c
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@@ -114,27 +114,33 @@ typedef enum
* - TLS NamedCurve ID (RFC 4492 sec. 5.1.1, RFC 7071 sec. 2)
* - size in bits
* - readable name
*
* The sequence of elements in this list also determines the default preference
* of the curves used by an ECHDE handshake.
* We start with the most secure curves. From the same sized curves, we prefer
* the SECP ones because they are much faster.
*
*/
static const ecp_curve_info ecp_supported_curves[] =
{
#if defined(POLARSSL_ECP_DP_BP512R1_ENABLED)
{ POLARSSL_ECP_DP_BP512R1, 28, 512, "brainpoolP512r1" },
#endif
#if defined(POLARSSL_ECP_DP_BP384R1_ENABLED)
{ POLARSSL_ECP_DP_BP384R1, 27, 384, "brainpoolP384r1" },
#endif
#if defined(POLARSSL_ECP_DP_BP256R1_ENABLED)
{ POLARSSL_ECP_DP_BP256R1, 26, 256, "brainpoolP256r1" },
#endif
#if defined(POLARSSL_ECP_DP_SECP521R1_ENABLED)
{ POLARSSL_ECP_DP_SECP521R1, 25, 521, "secp521r1" },
#endif
#if defined(POLARSSL_ECP_DP_BP512R1_ENABLED)
{ POLARSSL_ECP_DP_BP512R1, 28, 512, "brainpoolP512r1" },
#endif
#if defined(POLARSSL_ECP_DP_SECP384R1_ENABLED)
{ POLARSSL_ECP_DP_SECP384R1, 24, 384, "secp384r1" },
#endif
#if defined(POLARSSL_ECP_DP_BP384R1_ENABLED)
{ POLARSSL_ECP_DP_BP384R1, 27, 384, "brainpoolP384r1" },
#endif
#if defined(POLARSSL_ECP_DP_SECP256R1_ENABLED)
{ POLARSSL_ECP_DP_SECP256R1, 23, 256, "secp256r1" },
#endif
#if defined(POLARSSL_ECP_DP_BP256R1_ENABLED)
{ POLARSSL_ECP_DP_BP256R1, 26, 256, "brainpoolP256r1" },
#endif
#if defined(POLARSSL_ECP_DP_SECP224R1_ENABLED)
{ POLARSSL_ECP_DP_SECP224R1, 21, 224, "secp224r1" },
#endif
@@ -152,6 +158,8 @@ static const ecp_curve_info ecp_supported_curves[] =
#endif
{ POLARSSL_ECP_DP_NONE, 0, 0, NULL },
};
#define ECP_NUM_SUPPORTED_CURVES ( sizeof( ecp_supported_curves ) / \
sizeof( ecp_curve_info ) )
/*
* List of supported curves and associated info
@@ -215,6 +223,23 @@ const ecp_curve_info *ecp_curve_info_from_name( const char *name )
return( NULL );
}
/*
* Get the default ECDH curve list
*/
ecp_group_id *ecp_get_default_echd_curve_list( void )
{
static ecp_group_id ecdh_default_curve_list[ECP_NUM_SUPPORTED_CURVES];
int i;
/* Build the list of default curves based on ecp_supported_curves[] */
for( i = 0; i < ECP_NUM_SUPPORTED_CURVES; i++)
{
ecdh_default_curve_list[i] = ecp_supported_curves[i].grp_id;
}
return ecdh_default_curve_list;
}
/*
* Get the type of a curve
*/