mphell_tuto_eddsa-448+25519.c File Reference

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

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

Include dependency graph for mphell_tuto_eddsa-448+25519.c:

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Data Structures
struct	eddsa_sig
	Define an EdDSA signature. More...
struct	ecdsa_precomp
	Precomputation structure. More...

Macros
#define	PRECOMP_WIN_SIZE   9
#define	PRECOMP_SIZE   256
#define	HASH_SIZE   64

Typedefs
typedef struct eddsa_sig	eddsa_sig_t
	Define the EdDSA signature type.
typedef eddsa_sig_t	eddsa_sig[1]
	Pointer on an allocated eddsa_sig_t structure.
typedef struct ecdsa_precomp	ecdsa_precomp_t
typedef ecdsa_precomp_t	ecdsa_precomp[1]

Functions
void	eddsa_sign_alloc (eddsa_sig *sig, ec_curve_srcptr E, uint8_t size)
void	eddsa_sign_free (eddsa_sig *sig, ec_curve_srcptr E)
	Free a used signature structure. More...
void	ecdsa_precal (ecdsa_precomp *precomp, ec_point *key, ec_curve_ptr E)
void	ecdsa_precal_free (ecdsa_precomp *precomp, ec_curve_ptr E)
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	eddsa_sign (unsigned char *hash, eddsa_sig *sig, number priv_key, ec_point *pub_key, ec_curve *curve)
int8_t	eddsa_verify (unsigned char *hash, eddsa_sig *sig, ec_point *pub_key, ec_curve *curve, ecdsa_precomp precomp)
int8_t	eddsa_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 (int argc, char **argv)

Detailed Description

Tutorial for eddsa signature and verification using mphell.

Definition in file mphell_tuto_eddsa-448+25519.c.

Function Documentation

eddsa_pub_key_validation()

int8_t eddsa_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 633 of file mphell_tuto_eddsa-448+25519.c.

eddsa_sign_free()

void eddsa_sign_free	(	eddsa_sig *	sig,
		ec_curve_srcptr	E
	)

Free a used signature structure.

Parameters

sig

Signature

Definition at line 125 of file mphell_tuto_eddsa-448+25519.c.