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Add ECDSA signature primitive.

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This commit is contained in:
Manuel Pégourié-Gonnard
2013-01-26 18:05:50 +01:00
parent b309ab2936
commit 3aeb5a7192
2 changed files with 99 additions and 3 deletions
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18
include/polarssl/ecdsa.h
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@ -52,6 +52,24 @@ int ecdsa_sign( const ecp_group *grp, mpi *r, mpi *s,
const mpi *d, const unsigned char *buf, size_t blen,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
/**
* \brief Verify ECDSA signature of a previously hashed message
*
* \param grp ECP group
* \param buf Message hash
* \param blen Length of buf
* \param Q Public key to use for verification
* \param r First integer of the signature
* \param s Second integer of the signature
*
* \return 0 if successful,
* POLARSSL_ERR_ECP_BAD_INPUT_DATA if signature is invalid
* or a POLARSSL_ERR_ECP_XXX or POLARSSL_MPI_XXX error code
*/
int ecdsa_verify( const ecp_group *grp,
const unsigned char *buf, size_t blen,
const ecp_point *Q, const mpi *r, const mpi *s);
/**
* \brief Checkup routine
*