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Add brainpool curves to ecp_use_kown_dp()

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Manuel Pégourié-Gonnard 2013-10-08 12:04:56 +02:00
parent cec4a53c98
commit a070ada6d4
1 changed files with 49 additions and 5 deletions
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54
library/ecp.c
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@ -172,6 +172,7 @@ void ecp_group_free( ecp_group *grp )
return;
mpi_free( &grp->P );
mpi_free( &grp->A );
mpi_free( &grp->B );
ecp_point_free( &grp->G );
mpi_free( &grp->N );
@ -262,15 +263,16 @@ cleanup:
}
/*
* Import an ECP group from ASCII strings
* Import an ECP group from ASCII strings, general case (A used)
*/
int ecp_group_read_string( ecp_group *grp, int radix,
const char *p, const char *b,
static int ecp_group_read_string_gen( ecp_group *grp, int radix,
const char *p, const char *a, const char *b,
const char *gx, const char *gy, const char *n)
{
int ret;
MPI_CHK( mpi_read_string( &grp->P, radix, p ) );
MPI_CHK( mpi_read_string( &grp->A, radix, a ) );
MPI_CHK( mpi_read_string( &grp->B, radix, b ) );
MPI_CHK( ecp_point_read_string( &grp->G, radix, gx, gy ) );
MPI_CHK( mpi_read_string( &grp->N, radix, n ) );
@ -279,6 +281,23 @@ int ecp_group_read_string( ecp_group *grp, int radix,
grp->nbits = mpi_msb( &grp->N );
cleanup:
if( ret != 0 )
ecp_group_free( grp );
return( ret );
}
/*
* Import an ECP group from ASCII strings, case A == -3 (A cleared)
*/
int ecp_group_read_string( ecp_group *grp, int radix,
const char *p, const char *b,
const char *gx, const char *gy, const char *n)
{
int ret = ecp_group_read_string_gen( grp, radix, p, "00", b, gx, gy, n );
mpi_free( &grp->A );
return( ret );
}
@ -761,8 +780,29 @@ int ecp_use_known_dp( ecp_group *grp, ecp_group_id id )
SECP521R1_GX, SECP521R1_GY, SECP521R1_N ) );
#endif /* POLARSSL_ECP_DP_SECP521R1_ENABLED */
#if defined(POLARSSL_ECP_DP_BP256R1_ENABLED)
case POLARSSL_ECP_DP_BP256R1:
return( ecp_group_read_string_gen( grp, 16,
BP256R1_P, BP256R1_A, BP256R1_B,
BP256R1_GX, BP256R1_GY, BP256R1_N ) );
#endif /* POLARSSL_ECP_DP_BP256R1_ENABLED */
#if defined(POLARSSL_ECP_DP_BP384R1_ENABLED)
case POLARSSL_ECP_DP_BP384R1:
return( ecp_group_read_string_gen( grp, 16,
BP384R1_P, BP384R1_A, BP384R1_B,
BP384R1_GX, BP384R1_GY, BP384R1_N ) );
#endif /* POLARSSL_ECP_DP_BP384R1_ENABLED */
#if defined(POLARSSL_ECP_DP_BP512R1_ENABLED)
case POLARSSL_ECP_DP_BP512R1:
return( ecp_group_read_string_gen( grp, 16,
BP512R1_P, BP512R1_A, BP512R1_B,
BP512R1_GX, BP512R1_GY, BP512R1_N ) );
#endif /* POLARSSL_ECP_DP_BP512R1_ENABLED */
default:
grp->id = POLARSSL_ECP_DP_NONE;
ecp_group_free( grp );
return( POLARSSL_ERR_ECP_FEATURE_UNAVAILABLE );
}
}
@ -1016,7 +1056,7 @@ cleanup:
/*
* Point doubling R = 2 P, Jacobian coordinates (GECC 3.21)
* Point doubling R = 2 P, Jacobian coordinates with a == -3 (GECC 3.21)
*/
static int ecp_double_jac( const ecp_group *grp, ecp_point *R,
const ecp_point *P )
@ -1024,6 +1064,10 @@ static int ecp_double_jac( const ecp_group *grp, ecp_point *R,
int ret;
mpi T1, T2, T3, X, Y, Z;
/* We can't handle A != -3 yet */
if( grp->A.p != NULL )
return( POLARSSL_ERR_ECP_FEATURE_UNAVAILABLE );
#if defined(POLARSSL_SELF_TEST)
dbl_count++;
#endif