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Added slot for fast modp, with mod_p521

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This commit is contained in:
Manuel Pégourié-Gonnard
2012-11-10 00:27:12 +01:00
committed by Paul Bakker
parent 84d1aea1ac
commit 62aad14139
2 changed files with 87 additions and 3 deletions
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8
include/polarssl/ecp.h
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@ -54,6 +54,8 @@ ecp_point;
*
* The curves we consider are defined by y^2 = x^3 - 3x + b mod p,
* and a generator for a large subgroup is fixed.
*
* modp may be NULL; pbits will not be used in this case.
*/
typedef struct
{
@ -61,6 +63,8 @@ typedef struct
mpi B; /*!< constant term in the equation */
ecp_point G; /*!< generator of the subgroup used */
mpi N; /*!< the order of G */
int (*modp)(mpi *); /*!< function for fast reduction mod P */
unsigned pbits; /*!< number of bits in P */
}
ecp_group;
@ -244,7 +248,7 @@ int ecp_use_known_dp( ecp_group *grp, size_t index );
* \param Q Right-hand point
*
* \return 0 if successful,
* POLARSSL_ERR_MPI_MALLOC_FAILED if memory allocation failed,
* POLARSSL_ERR_MPI_MALLOC_FAILED if memory allocation failed
*/
int ecp_add( const ecp_group *grp, ecp_point *R,
const ecp_point *P, const ecp_point *Q );
@ -258,7 +262,7 @@ int ecp_add( const ecp_group *grp, ecp_point *R,
* \param P Point to multiply
*
* \return 0 if successful,
* POLARSSL_ERR_MPI_MALLOC_FAILED if memory allocation failed,
* POLARSSL_ERR_MPI_MALLOC_FAILED if memory allocation failed
*/
int ecp_mul( const ecp_group *grp, ecp_point *R,
const mpi *m, const ecp_point *P );