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Add mbedtls_ecp_gen_keypair_base()

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This commit is contained in:
Manuel Pégourié-Gonnard 2015-08-11 14:31:03 +02:00
parent 8489f17277
commit d9a3f47ecd
2 changed files with 39 additions and 3 deletions
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23
include/mbedtls/ecp.h
View File

@ -569,6 +569,29 @@ int mbedtls_ecp_check_pubkey( const mbedtls_ecp_group *grp, const mbedtls_ecp_po
*/ */
int mbedtls_ecp_check_privkey( const mbedtls_ecp_group *grp, const mbedtls_mpi *d ); int mbedtls_ecp_check_privkey( const mbedtls_ecp_group *grp, const mbedtls_mpi *d );
/**
* \brief Generate a keypair with configurable base point
*
* \param grp ECP group
* \param G Chosen base point
* \param d Destination MPI (secret part)
* \param Q Destination point (public part)
* \param f_rng RNG function
* \param p_rng RNG parameter
*
* \return 0 if successful,
* or a MBEDTLS_ERR_ECP_XXX or MBEDTLS_MPI_XXX error code
*
* \note Uses bare components rather than an mbedtls_ecp_keypair structure
* in order to ease use with other structures such as
* mbedtls_ecdh_context of mbedtls_ecdsa_context.
*/
int mbedtls_ecp_gen_keypair_base( mbedtls_ecp_group *grp,
const mbedtls_ecp_point *G,
mbedtls_mpi *d, mbedtls_ecp_point *Q,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng );
/** /**
* \brief Generate a keypair * \brief Generate a keypair
* *

19
library/ecp.c
View File

@ -1761,9 +1761,11 @@ int mbedtls_ecp_check_privkey( const mbedtls_ecp_group *grp, const mbedtls_mpi *
} }
/* /*
* Generate a keypair * Generate a keypair with configurable base point
*/ */
int mbedtls_ecp_gen_keypair( mbedtls_ecp_group *grp, mbedtls_mpi *d, mbedtls_ecp_point *Q, int mbedtls_ecp_gen_keypair_base( mbedtls_ecp_group *grp,
const mbedtls_ecp_point *G,
mbedtls_mpi *d, mbedtls_ecp_point *Q,
int (*f_rng)(void *, unsigned char *, size_t), int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng ) void *p_rng )
{ {
@ -1835,7 +1837,18 @@ cleanup:
if( ret != 0 ) if( ret != 0 )
return( ret ); return( ret );
return( mbedtls_ecp_mul( grp, Q, d, &grp->G, f_rng, p_rng ) ); return( mbedtls_ecp_mul( grp, Q, d, G, f_rng, p_rng ) );
}
/*
* Generate key pair, wrapper for conventional base point
*/
int mbedtls_ecp_gen_keypair( mbedtls_ecp_group *grp,
mbedtls_mpi *d, mbedtls_ecp_point *Q,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng )
{
return( mbedtls_ecp_gen_keypair_base( grp, &grp->G, d, Q, f_rng, p_rng ) );
} }
/* /*