myEcdsa.c File Reference

#include <tomcrypt.h>
#include <tommath.h>
#include "myEcdsa.h"
#include "utils.h"

Functions
void	ecdsaKeyPair (int keypairCurve)
	產生ECDSA的key pair
int	ecdsaKeyVerify (int keypairCurve, char *qx, char *qy)
	驗證ECDSA的key pair
void	hash_message (char *message, unsigned long messageLen, int hashAlgorithm, unsigned char *out, unsigned long *outlen)
void	ecdsaSignatureGenerate (int keypairCurve, int hashAlgorithm, char *d, char *message)
	產生ECDSA的簽章
int	ecdsaSignatureVerify (int keypairCurve, int hashAlgorithm, char *qx, char *qy, char *r, char *s, char *message)
	驗證ECDSA的簽章

Variables
const int	ECDSA_CURVE_P256 = 1
const int	ECDSA_CURVE_P384 = 2
const int	ECDSA_CURVE_P521 = 3
const int	ECDSA_HASH_SHA2_256 = 1
const int	ECDSA_HASH_SHA2_384 = 2
const int	ECDSA_HASH_SHA2_512 = 3
const int	ECDSA_HASH_SHA3_256 = 4
const int	ECDSA_HASH_SHA3_384 = 5
const int	ECDSA_HASH_SHA3_512 = 6
const int	ECDSA_HASH_SHAKE128 = 7
const int	ECDSA_HASH_SHAKE256 = 8

Function Documentation

ecdsaKeyPair()

void ecdsaKeyPair

(

int

keypairCurve

)

產生ECDSA的key pair

產生ECDSA的key pair，可以選擇不同的curve 使用範例:

ecdsaKeyPair(ECDSA_CURVE_P256);

Parameters

keypairCurve

ECDSA_CURVE_P256, ECDSA_CURVE_P384, ECDSA_CURVE_P521

ecdsaKeyVerify()

int ecdsaKeyVerify	(	int	keypairCurve,
		char *	qx,
		char *	qy )

驗證ECDSA的key pair

驗證ECDSA的key pair，可以選擇不同的curve 使用範例:

char* qx = "B5524388413982F4A4DDF018240EA61270EA0524F4B7675654AF9B9E754AB8F07B10D80CE44722679E35B4A25B64B09C";
char* qy = "F739CF6189E6B750054EA5182E42399780BBB39D1A4BF70DB853857B8E9BA077B77C15D8A8BD0D645D70CDA4D50BF7D5";
int result = ecdsaKeyVerify(ECDSA_CURVE_P384, qx, qy); //1
printf("result: %d\n", result);

Parameters

keypairCurve	ECDSA_CURVE_P256, ECDSA_CURVE_P384, ECDSA_CURVE_P521
qx	公鑰的x座標
qy	公鑰的y座標

Returns

1:成功 0:失敗

ecdsaSignatureGenerate()

void ecdsaSignatureGenerate	(	int	keypairCurve,
		int	hashAlgorithm,
		char *	d,
		char *	message )

產生ECDSA的簽章

產生ECDSA的簽章，可以選擇不同的curve及hash演算法
使用範例:

char* d = "419C5769809C963614837F0B90119BDB403FC71100E08235EA143B9E78C1FE42";
char* message = "97F4CBB1A874F3F4F87B14411F97CCC2D02A5B0DB67C5BB"
                "01557D74230A05F9578527215FF5E0020A0CA5C6E401E53"
                "BD65841AAA9EDE31090ACA0FA99494BF54E9555F7254314"
                "7EAD5F9ECE785667B25006CD6EFF549EBD7C5C6474648D5"
                "198DB1E2D4BC4454293C730FF389B6F6D05110587FAE217"
                "137BE11A3C77D6DBAFAC8";
ecdsaSignatureGenerate(ECDSA_CURVE_P256, ECDSA_HASH_SHA2_256, d, message);

Parameters

keypairCurve	ECDSA_CURVE_P256, ECDSA_CURVE_P384, ECDSA_CURVE_P521
hashAlgorithm	ECDSA_HASH_SHA2_256, ECDSA_HASH_SHA2_384, ECDSA_HASH_SHA2_512, ECDSA_HASH_SHA3_256, ECDSA_HASH_SHA3_384, ECDSA_HASH_SHA3_512, ECDSA_HASH_SHAKE128, ECDSA_HASH_SHAKE256
d	私鑰
message	訊息

ecdsaSignatureVerify()

int ecdsaSignatureVerify	(	int	keypairCurve,
		int	hashAlgorithm,
		char *	qx,
		char *	qy,
		char *	r,
		char *	s,
		char *	message )

驗證ECDSA的簽章

驗證ECDSA的簽章，可以選擇不同的curve及hash演算法 使用範例:

char* qx = "765AFA3EEEE046FD5BDA99F7DE707D313C04F29E15579A50C18E193F527EDA87";
char* qy = "00A80C57E3E3A416750D5CB936AE3F1BFC75BB4263620DDA272DD3FB26AD4E6507";
char* r = "D6B69ED0200EC563CBD3F12240809D7613EFE712A0D95DEB1EFBBD21CB868B42";
char* s = "236ADAAE2DCE176EB3EA0193CC4E45EA7CDDF5315ADEC71DFA6062DDD9D0DBE6";
char* message = "97F4CBB1A874F3F4F87B14411F97CCC2D02A5B0DB67C5BB01557D74230A05F9578527215FF5E00"
                "20A0CA5C6E401E53BD65841AAA9EDE31090ACA0FA99494BF54E9555F72543147EAD5F9ECE78566"
                "7B25006CD6EFF549EBD7C5C6474648D5198DB1E2D4BC4454293C730FF389B6F6D05110587FAE217"
                "137BE11A3C77D6DBAFAC8";
 
ecdsaSignatureVerify(ECDSA_CURVE_P256, ECDSA_HASH_SHA2_256, qx, qy, r, s, message);

Parameters

keypairCurve	ECDSA_CURVE_P256, ECDSA_CURVE_P384, ECDSA_CURVE_P521
hashAlgorithm	ECDSA_HASH_SHA2_256, ECDSA_HASH_SHA2_384, ECDSA_HASH_SHA2_512, ECDSA_HASH_SHA3_256, ECDSA_HASH_SHA3_384, ECDSA_HASH_SHA3_512, ECDSA_HASH_SHAKE128, ECDSA_HASH_SHAKE256
qx	公鑰的x座標
qy	公鑰的y座標
r	簽章的r值
s	簽章的s值
message	訊息

Returns

1:成功 0:失敗

hash_message()

void hash_message	(	char *	message,
		unsigned long	messageLen,
		int	hashAlgorithm,
		unsigned char *	out,
		unsigned long *	outlen )

Variable Documentation

ECDSA_CURVE_P256

const int ECDSA_CURVE_P256 = 1

ECDSA_CURVE_P384

const int ECDSA_CURVE_P384 = 2

ECDSA_CURVE_P521

const int ECDSA_CURVE_P521 = 3

ECDSA_HASH_SHA2_256

const int ECDSA_HASH_SHA2_256 = 1

ECDSA_HASH_SHA2_384

const int ECDSA_HASH_SHA2_384 = 2

ECDSA_HASH_SHA2_512

const int ECDSA_HASH_SHA2_512 = 3

ECDSA_HASH_SHA3_256

const int ECDSA_HASH_SHA3_256 = 4

ECDSA_HASH_SHA3_384

const int ECDSA_HASH_SHA3_384 = 5

ECDSA_HASH_SHA3_512

const int ECDSA_HASH_SHA3_512 = 6

ECDSA_HASH_SHAKE128

const int ECDSA_HASH_SHAKE128 = 7

ECDSA_HASH_SHAKE256

const int ECDSA_HASH_SHAKE256 = 8