mphell_tuto_ecsdsa.c File Reference

Tutorial for ecsdsa signature and verification using mphell. More...

#include <stdio.h>
#include "mphell/mphell.h"

Include dependency graph for mphell_tuto_ecsdsa.c:

Go to the source code of this file.

Data Structures
struct	ecsdsa_sig
	Define an ECSDSA signature. More...

Typedefs
typedef struct ecsdsa_sig	ecsdsa_sig_t
	Define the ECSDSA signature type.
typedef ecsdsa_sig_t	ecsdsa_sig[1]
	Pointer on an allocated ecsdsa_sig_t structure.

Functions
void	ecsdsa_sign_alloc (ecsdsa_sig *sig, int size)
void	ecsdsa_sign_free (ecsdsa_sig *sig)
void	ec_point_mul_ecdsa (ec_point dst, number_srcptr u1, ec_point_srcptr G, number_srcptr u2, ec_point_srcptr key, ec_curve_srcptr E)
void	ecsdsa_sign (unsigned char *hash, ecsdsa_sig *sig, number priv_key, ec_curve *curve)
	Sign "hash" with ECDSA algorithm using the EC "curve" and the private key "key". More...
int8_t	ecsdsa_verify (unsigned char *hash, ecsdsa_sig *sig, ec_point *pub_key, ec_curve *curve)
	Verify the signature "sig" of hash "hash" using public key "pub_key" and the EC "curve". More...
int8_t	ecsdsa_pub_key_validation (ec_point *pub_key, ec_curve *curve)
	Verify that the public key is valid (id est check taht pub_key belongs to the curve, that pub_key is not the neutral element and that pub_key is of ordre n) More...
int	main ()

Detailed Description

Tutorial for ecsdsa signature and verification using mphell.

Definition in file mphell_tuto_ecsdsa.c.

Function Documentation

ecsdsa_pub_key_validation()

int8_t ecsdsa_pub_key_validation	(	ec_point *	pub_key,
		ec_curve *	curve
	)

Verify that the public key is valid (id est check taht pub_key belongs to the curve, that pub_key is not the neutral element and that pub_key is of ordre n)

Parameters

hash	H(m) where H is a cryptographic hash function and m the message to sign. Must be written under hexadecimal form. ex: 64 hexadecimal characters for sha256.
pub_key	Public key
curve	Elliptic curve

Returns

1 on success, 0 on failure

Definition at line 398 of file mphell_tuto_ecsdsa.c.

ecsdsa_sign()

void ecsdsa_sign	(	unsigned char *	hash,
		ecsdsa_sig *	sig,
		number	priv_key,
		ec_curve *	curve
	)

Sign "hash" with ECDSA algorithm using the EC "curve" and the private key "key".

Parameters

hash	H(m) where H is a cryptographic hash function and m the message to sign. Must be written under hexadecimal form. ex: 64 hexadecimal characters for sha256.
sig	Destination signature. Pointer on an allocated ecdsa_sig structure.
priv_key	Private key
curve	Elliptic curve

Definition at line 166 of file mphell_tuto_ecsdsa.c.

ecsdsa_verify()

int8_t ecsdsa_verify	(	unsigned char *	hash,
		ecsdsa_sig *	sig,
		ec_point *	pub_key,
		ec_curve *	curve
	)

Verify the signature "sig" of hash "hash" using public key "pub_key" and the EC "curve".

For the hash several functions can be used, the interested reader can refer to [FIPS-180]

Parameters

hash	H(m) where H is a cryptographic hash function and m the message to sign. Must be written under hexadecimal form. ex: 64 hexadecimal characters for sha256.
sig	Signature of hash
pub_key	Public key
curve	Elliptic curve

Returns

1 on success, 0 on failure

Definition at line 288 of file mphell_tuto_ecsdsa.c.