ecs_sign.c File Reference

#include "ecs_locl.h"
#include <openssl/engine.h>
#include <openssl/rand.h>

Go to the source code of this file.

Functions
ECDSA_SIG *	ECDSA_do_sign (const unsigned char *dgst, int dlen, EC_KEY *eckey)
ECDSA_SIG *	ECDSA_do_sign_ex (const unsigned char *dgst, int dlen, const BIGNUM *kinv, const BIGNUM *rp, EC_KEY *eckey)
int	ECDSA_sign (int type, const unsigned char *dgst, int dlen, unsigned char *sig, unsigned int *siglen, EC_KEY *eckey)
int	ECDSA_sign_ex (int type, const unsigned char *dgst, int dlen, unsigned char *sig, unsigned int *siglen, const BIGNUM *kinv, const BIGNUM *r, EC_KEY *eckey)
int	ECDSA_sign_setup (EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)

Function Documentation

ECDSA_SIG* ECDSA_do_sign	(	const unsigned char *	dgst,
		int	dgst_len,
		EC_KEY *	eckey
	)

Computes the ECDSA signature of the given hash value using the supplied private key and returns the created signature.

Parameters

dgst	pointer to the hash value
dgst_len	length of the hash value
eckey	EC_KEY object containing a private EC key

Returns

pointer to a ECDSA_SIG structure or NULL if an error occurred

Definition at line 62 of file ecs_sign.c.

ECDSA_SIG* ECDSA_do_sign_ex	(	const unsigned char *	dgst,
		int	dgstlen,
		const BIGNUM *	kinv,
		const BIGNUM *	rp,
		EC_KEY *	eckey
	)

Computes ECDSA signature of a given hash value using the supplied private key (note: sig must point to ECDSA_size(eckey) bytes of memory).

Parameters

dgst	pointer to the hash value to sign
dgstlen	length of the hash value
kinv	BIGNUM with a pre-computed inverse k (optional)
rp	BIGNUM with a pre-computed rp value (optioanl), see ECDSA_sign_setup
eckey	EC_KEY object containing a private EC key

Returns

pointer to a ECDSA_SIG structure or NULL if an error occurred

Definition at line 67 of file ecs_sign.c.

int ECDSA_sign	(	int	type,
		const unsigned char *	dgst,
		int	dgstlen,
		unsigned char *	sig,
		unsigned int *	siglen,
		EC_KEY *	eckey
	)

Computes ECDSA signature of a given hash value using the supplied private key (note: sig must point to ECDSA_size(eckey) bytes of memory).

Parameters

type	this parameter is ignored
dgst	pointer to the hash value to sign
dgstlen	length of the hash value
sig	memory for the DER encoded created signature
siglen	pointer to the length of the returned signature
eckey	EC_KEY object containing a private EC key

Returns

1 on success and 0 otherwise

Definition at line 76 of file ecs_sign.c.

int ECDSA_sign_ex	(	int	type,
		const unsigned char *	dgst,
		int	dgstlen,
		unsigned char *	sig,
		unsigned int *	siglen,
		const BIGNUM *	kinv,
		const BIGNUM *	rp,
		EC_KEY *	eckey
	)

Computes ECDSA signature of a given hash value using the supplied private key (note: sig must point to ECDSA_size(eckey) bytes of memory).

Parameters

type	this parameter is ignored
dgst	pointer to the hash value to sign
dgstlen	length of the hash value
sig	buffer to hold the DER encoded signature
siglen	pointer to the length of the returned signature
kinv	BIGNUM with a pre-computed inverse k (optional)
rp	BIGNUM with a pre-computed rp value (optioanl), see ECDSA_sign_setup
eckey	EC_KEY object containing a private EC key

Returns

1 on success and 0 otherwise

Definition at line 82 of file ecs_sign.c.

int ECDSA_sign_setup	(	EC_KEY *	eckey,
		BN_CTX *	ctx,
		BIGNUM **	kinv,
		BIGNUM **	rp
	)

Precompute parts of the signing operation

Parameters

eckey	EC_KEY object containing a private EC key
ctx	BN_CTX object (optional)
kinv	BIGNUM pointer for the inverse of k
rp	BIGNUM pointer for x coordinate of k * generator

Returns

1 on success and 0 otherwise

Definition at line 99 of file ecs_sign.c.