WolfSSL
/
wolfssl-examples
mirror of https://github.com/wolfSSL/wolfssl-examples.git
1
0
Fork 0
Code Issues Releases Wiki Activity
wolfssl-examples/pk/ecc/ecc_sign_deterministic.c

513 lines
15 KiB
C
Raw Blame History

/* ecc_sign_deterministic.c
*
* Copyright (C) 2006-2024 wolfSSL Inc.
*
* This file is part of wolfSSL. (formerly known as CyaSSL)
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/* Example to demonstrate SHA-256 hashing and ECC Sign */
/*
./configure CFLAGS="-DWOLFSSL_PUBLIC_MP" && make && sudo make install
gcc -lwolfssl -o ecc_sign ecc_sign.c
*/
#ifndef WOLFSSL_USER_SETTINGS
#include <wolfssl/options.h>
#endif
#include <wolfssl/wolfcrypt/settings.h>
#include <wolfssl/wolfcrypt/sha.h>
#include <wolfssl/wolfcrypt/ecc.h>
#include <wolfssl/wolfcrypt/integer.h>
#include <wolfssl/wolfcrypt/error-crypt.h>
#include <wolfssl/wolfcrypt/logging.h>
#include <wolfssl/wolfcrypt/hash.h>
#include <stdint.h>
#include <stdio.h>
#ifdef WOLFSSL_PUBLIC_MP
/* message = "sample": */
static const char kMsg[] = "sample";
#define DIGEST_SZ WC_SHA256_DIGEST_SIZE
#define HASH_FUNC crypto_sha256
#if 0
/* SECP256R1 */
#define ECC_KEY_CURVE ECC_SECP256R1
#define ECC_KEY_SIZE 32
/* Test Vector: ECDSA, 256 Bits (Prime Field) */
static const uint8_t kPrivKey[] = {
/* d */
0xC9, 0xAF, 0xA9, 0xD8, 0x45, 0xBA, 0x75, 0x16,
0x6B, 0x5C, 0x21, 0x57, 0x67, 0xB1, 0xD6, 0x93,
0x4E, 0x50, 0xC3, 0xDB, 0x36, 0xE8, 0x9B, 0x12,
0x7B, 0x8A, 0x62, 0x2B, 0x12, 0x0F, 0x67, 0x21
};
static const uint8_t kPubKey[] = {
/* Qx */
0x60, 0xFE, 0xD4, 0xBA, 0x25, 0x5A, 0x9D, 0x31,
0xC9, 0x61, 0xEB, 0x74, 0xC6, 0x35, 0x6D, 0x68,
0xC0, 0x49, 0xB8, 0x92, 0x3B, 0x61, 0xFA, 0x6C,
0xE6, 0x69, 0x62, 0x2E, 0x60, 0xF2, 0x9F, 0xB6,
/* Qy */
0x79, 0x03, 0xFE, 0x10, 0x08, 0xB8, 0xBC, 0x99,
0xA4, 0x1A, 0xE9, 0xE9, 0x56, 0x28, 0xBC, 0x64,
0xF2, 0xF1, 0xB2, 0x0C, 0x2D, 0x7E, 0x9F, 0x51,
0x77, 0xA3, 0xC2, 0x94, 0xD4, 0x46, 0x22, 0x99
};
#elif 0
/* SECP384R1 */
#define ECC_KEY_CURVE ECC_SECP384R1
#define ECC_KEY_SIZE 48
/* Test Vector: ECDSA, 384 Bits (Prime Field) */
static const uint8_t kPrivKey[] = {
/* d */
0x6B, 0x9D, 0x3D, 0xAD, 0x2E, 0x1B, 0x8C, 0x1C,
0x05, 0xB1, 0x98, 0x75, 0xB6, 0x65, 0x9F, 0x4D,
0xE2, 0x3C, 0x3B, 0x66, 0x7B, 0xF2, 0x97, 0xBA,
0x9A, 0xA4, 0x77, 0x40, 0x78, 0x71, 0x37, 0xD8,
0x96, 0xD5, 0x72, 0x4E, 0x4C, 0x70, 0xA8, 0x25,
0xF8, 0x72, 0xC9, 0xEA, 0x60, 0xD2, 0xED, 0xF5
};
static const uint8_t kPubKey[] = {
/* Qx */
0xEC, 0x3A, 0x4E, 0x41, 0x5B, 0x4E, 0x19, 0xA4,
0x56, 0x86, 0x18, 0x02, 0x9F, 0x42, 0x7F, 0xA5,
0xDA, 0x9A, 0x8B, 0xC4, 0xAE, 0x92, 0xE0, 0x2E,
0x06, 0xAA, 0xE5, 0x28, 0x6B, 0x30, 0x0C, 0x64,
0xDE, 0xF8, 0xF0, 0xEA, 0x90, 0x55, 0x86, 0x60,
0x64, 0xA2, 0x54, 0x51, 0x54, 0x80, 0xBC, 0x13,
/* Qy */
0x80, 0x15, 0xD9, 0xB7, 0x2D, 0x7D, 0x57, 0x24,
0x4E, 0xA8, 0xEF, 0x9A, 0xC0, 0xC6, 0x21, 0x89,
0x67, 0x08, 0xA5, 0x93, 0x67, 0xF9, 0xDF, 0xB9,
0xF5, 0x4C, 0xA8, 0x4B, 0x3F, 0x1C, 0x9D, 0xB1,
0x28, 0x8B, 0x23, 0x1C, 0x3A, 0xE0, 0xD4, 0xFE,
0x73, 0x44, 0xFD, 0x25, 0x33, 0x26, 0x47, 0x20
};
#elif 1
/* SECP521R1 */
#define ECC_KEY_CURVE ECC_SECP521R1
#define ECC_KEY_SIZE 66
/* Test Vector: ECDSA, 521 Bits (Prime Field) */
static const uint8_t kPrivKey[] = {
/* d */
0x0F, 0xAD, 0x06, 0xDA, 0xA6, 0x2B, 0xA3, 0xB2, 0x5D, 0x2F, 0xB4,
0x01, 0x33, 0xDA, 0x75, 0x72, 0x05, 0xDE, 0x67, 0xF5, 0xBB, 0x00,
0x18, 0xFE, 0xE8, 0xC8, 0x6E, 0x1B, 0x68, 0xC7, 0xE7, 0x5C, 0xAA,
0x89, 0x6E, 0xB3, 0x2F, 0x1F, 0x47, 0xC7, 0x08, 0x55, 0x83, 0x6A,
0x6D, 0x16, 0xFC, 0xC1, 0x46, 0x6F, 0x6D, 0x8F, 0xBE, 0xC6, 0x7D,
0xB8, 0x9E, 0xC0, 0xC0, 0x8B, 0x0E, 0x99, 0x6B, 0x83, 0x53, 0x08
};
static const uint8_t kPubKey[] = {
/* Qx */
0x18, 0x94, 0x55, 0x0D, 0x07, 0x85, 0x93, 0x2E, 0x00, 0xEA, 0xA2,
0x3B, 0x69, 0x4F, 0x21, 0x3F, 0x8C, 0x31, 0x21, 0xF8, 0x6D, 0xC9,
0x7A, 0x04, 0xE5, 0xA7, 0x16, 0x7D, 0xB4, 0xE5, 0xBC, 0xD3, 0x71,
0x12, 0x3D, 0x46, 0xE4, 0x5D, 0xB6, 0xB5, 0xD5, 0x37, 0x0A, 0x7F,
0x20, 0xFB, 0x63, 0x31, 0x55, 0xD3, 0x8F, 0xFA, 0x16, 0xD2, 0xBD,
0x76, 0x1D, 0xCA, 0xC4, 0x74, 0xB9, 0xA2, 0xF5, 0x02, 0x3A, 0x04,
/* Qy */
0x04, 0x93, 0x10, 0x1C, 0x96, 0x2C, 0xD4, 0xD2, 0xFD, 0xDF, 0x78,
0x22, 0x85, 0xE6, 0x45, 0x84, 0x13, 0x9C, 0x2F, 0x91, 0xB4, 0x7F,
0x87, 0xFF, 0x82, 0x35, 0x4D, 0x66, 0x30, 0xF7, 0x46, 0xA2, 0x8A,
0x0D, 0xB2, 0x57, 0x41, 0xB5, 0xB3, 0x4A, 0x82, 0x80, 0x08, 0xB2,
0x2A, 0xCC, 0x23, 0xF9, 0x24, 0xFA, 0xAF, 0xBD, 0x4D, 0x33, 0xF8,
0x1E, 0xA6, 0x69, 0x56, 0xDF, 0xEA, 0xA2, 0xBF, 0xDF, 0xCF, 0x05
};
#endif
#ifndef NO_SHA256
/* perform hashing block by block */
int crypto_sha256(const uint8_t *buf, uint32_t len, uint8_t *hash,
uint32_t hashSz, uint32_t blkSz)
{
int ret;
uint32_t i = 0, chunk;
wc_Sha256 sha;
/* validate arguments */
if ((buf == NULL && len > 0) || hash == NULL ||
hashSz < WC_SHA256_DIGEST_SIZE || blkSz == 0)
{
return BAD_FUNC_ARG;
}
/* Init Sha256 structure */
ret = wc_InitSha256(&sha);
if (ret != 0) {
return ret;
}
while (i < len) {
chunk = blkSz;
if ((chunk + i) > len)
chunk = len - i;
/* Perform chunked update */
ret = wc_Sha256Update(&sha, (buf + i), chunk);
if (ret != 0) {
break;
}
i += chunk;
}
if (ret == 0) {
/* Get final digest result */
ret = wc_Sha256Final(&sha, hash);
}
return ret;
}
#endif
#ifdef WOLFSSL_SHA384
/* perform hashing block by block */
int crypto_sha384(const uint8_t *buf, uint32_t len, uint8_t *hash,
uint32_t hashSz, uint32_t blkSz)
{
int ret;
uint32_t i = 0, chunk;
wc_Sha384 sha;
/* validate arguments */
if ((buf == NULL && len > 0) || hash == NULL ||
hashSz < WC_SHA384_DIGEST_SIZE || blkSz == 0)
{
return BAD_FUNC_ARG;
}
/* Init structure */
ret = wc_InitSha384(&sha);
if (ret != 0) {
return ret;
}
while (i < len) {
chunk = blkSz;
if ((chunk + i) > len)
chunk = len - i;
/* Perform chunked update */
ret = wc_Sha384Update(&sha, (buf + i), chunk);
if (ret != 0) {
break;
}
i += chunk;
}
if (ret == 0) {
/* Get final digest result */
ret = wc_Sha384Final(&sha, hash);
}
return ret;
}
#endif
#ifdef WOLFSSL_SHA512
/* perform hashing block by block */
int crypto_sha512(const uint8_t *buf, uint32_t len, uint8_t *hash,
uint32_t hashSz, uint32_t blkSz)
{
int ret;
uint32_t i = 0, chunk;
wc_Sha512 sha;
/* validate arguments */
if ((buf == NULL && len > 0) || hash == NULL ||
hashSz < WC_SHA512_DIGEST_SIZE || blkSz == 0)
{
return BAD_FUNC_ARG;
}
/* Init structure */
ret = wc_InitSha512(&sha);
if (ret != 0) {
return ret;
}
while (i < len) {
chunk = blkSz;
if ((chunk + i) > len)
chunk = len - i;
/* Perform chunked update */
ret = wc_Sha512Update(&sha, (buf + i), chunk);
if (ret != 0) {
break;
}
i += chunk;
}
if (ret == 0) {
/* Get final digest result */
ret = wc_Sha512Final(&sha, hash);
}
return ret;
}
#endif
#ifdef HAVE_ECC
#ifdef HAVE_ECC_VERIFY
/* perform verify of signature and hash using public key */
/* key is public Qx + public Qy */
/* sig is r + s */
int crypto_ecc_verify(const uint8_t *key, uint32_t keySz,
const uint8_t *hash, uint32_t hashSz, const uint8_t *sig, uint32_t sigSz,
int curveSz, int curveId)
{
int ret, verify_res = 0;
mp_int r, s;
ecc_key ecc;
/* validate arguments */
if (key == NULL || hash == NULL || sig == NULL || curveSz == 0 ||
hashSz == 0 || keySz < (curveSz*2) || sigSz < (curveSz*2))
{
return BAD_FUNC_ARG;
}
/* Setup the ECC key */
ret = wc_ecc_init(&ecc);
if (ret < 0) {
return ret;
}
/* Setup the signature r/s variables */
ret = mp_init(&r);
if (ret != MP_OKAY) {
wc_ecc_free(&ecc);
return ret;
}
ret = mp_init(&s);
if (ret != MP_OKAY) {
mp_clear(&r);
wc_ecc_free(&ecc);
return ret;
}
/* Import public key x/y */
ret = wc_ecc_import_unsigned(
&ecc,
(byte*)key, /* Public "x" Coordinate */
(byte*)(key + curveSz), /* Public "y" Coordinate */
NULL, /* Private "d" (optional) */
curveId /* ECC Curve Id */
);
/* Make sure it was a public key imported */
if (ret == 0 && ecc.type != ECC_PUBLICKEY) {
ret = ECC_BAD_ARG_E;
}
/* Import signature r/s */
if (ret == 0) {
ret = mp_read_unsigned_bin(&r, sig, curveSz);
}
if (ret == 0) {
ret = mp_read_unsigned_bin(&s, sig + curveSz, curveSz);
}
/* Verify ECC Signature */
if (ret == 0) {
ret = wc_ecc_verify_hash_ex(
&r, &s, /* r/s as mp_int */
hash, hashSz, /* computed hash digest */
&verify_res, /* verification result 1=success */
&ecc
);
}
/* check verify result */
if (ret == 0 && verify_res == 0) {
ret = SIG_VERIFY_E;
}
mp_clear(&r);
mp_clear(&s);
wc_ecc_free(&ecc);
return ret;
}
#endif /* HAVE_ECC_VERIFY */
#ifdef HAVE_ECC_SIGN
/* perform signature operation against hash using private key */
int crypto_ecc_sign(const uint8_t *key, uint32_t keySz,
const uint8_t *hash, uint32_t hashSz, uint8_t *sig, uint32_t* sigSz,
int curveSz, int curveId)
{
int ret;
mp_int r, s;
ecc_key ecc;
WC_RNG rng;
/* validate arguments */
if (key == NULL || hash == NULL || sig == NULL || sigSz == NULL ||
curveSz == 0 || hashSz == 0 || keySz < curveSz || *sigSz < (curveSz*2))
{
return BAD_FUNC_ARG;
}
/* Initialize signature result */
memset(sig, 0, curveSz*2);
/* Setup the RNG */
ret = wc_InitRng(&rng);
if (ret < 0) {
return ret;
}
/* Setup the ECC key */
ret = wc_ecc_init(&ecc);
if (ret < 0) {
wc_FreeRng(&rng);
return ret;
}
/* enable deterministic signing */
/* result will always be the same, no random point is used */
wc_ecc_set_deterministic(&ecc, 1);
/* Setup the signature r/s variables */
ret = mp_init(&r);
if (ret != MP_OKAY) {
wc_ecc_free(&ecc);
wc_FreeRng(&rng);
return ret;
}
ret = mp_init(&s);
if (ret != MP_OKAY) {
mp_clear(&r);
wc_ecc_free(&ecc);
wc_FreeRng(&rng);
return ret;
}
/* Import private key "k" */
ret = wc_ecc_import_private_key_ex(
key, keySz, /* private key "d" */
NULL, 0, /* public (optional) */
&ecc,
curveId /* ECC Curve Id */
);
if (ret == 0) {
/* Verify ECC Signature */
ret = wc_ecc_sign_hash_ex(
hash, hashSz, /* computed hash digest */
&rng, &ecc, /* random and key context */
&r, &s /* r/s as mp_int */
);
/* export r/s */
mp_to_unsigned_bin(&r, sig);
mp_to_unsigned_bin(&s, sig + curveSz);
}
mp_clear(&r);
mp_clear(&s);
wc_ecc_free(&ecc);
wc_FreeRng(&rng);
return ret;
}
#endif /* HAVE_ECC_SIGN */
#endif /* HAVE_ECC */
static void print_hex(uint8_t* data, int sz)
{
int i;
for (i = 0; i < sz; i++) {
printf("%02X ", data[i]);
if (i > 0 && ((i+1) % 16) == 0)
printf("\n");
}
printf("\n");
}
#endif /* WOLFSSL_PUBLIC_MP */
int main()
{
#if defined(HAVE_ECC) && defined(HAVE_ECC_SIGN) && defined(HAVE_ECC_VERIFY) && \
defined(WOLFSSL_SHA512) && defined(WOLFSSL_PUBLIC_MP)
int ret;
uint8_t hash[DIGEST_SZ];
uint8_t sig[ECC_KEY_SIZE*2];
uint32_t sigSz = 0;
#ifdef DEBUG_WOLFSSL
wolfSSL_Debugging_ON();
#endif
if (ECC_KEY_SIZE == 66)
printf("Running NIST P-%d,SHA-%d Deterministic Sign Test\n", (ECC_KEY_SIZE*8)-7, DIGEST_SZ*8);
else
printf("Running NIST P-%d,SHA-%d Deterministic Sign Test\n", (ECC_KEY_SIZE*8), DIGEST_SZ*8);
memset(sig, 0, sizeof(sig));
ret = HASH_FUNC(
(uint8_t*)kMsg, sizeof(kMsg)-1, /* input message sizeof()-1 to get actual length without null termination */
hash, sizeof(hash), /* hash digest result */
32 /* configurable block / chunk size */
);
if (ret == 0) {
printf("Digest %d\n", (int)sizeof(hash));
print_hex(hash, sizeof(hash));
/* Sign hash using private key */
/* Note: result of an ECC sign varies for each call even with same
private key and hash. This is because a new random public key is
used for each operation. */
sigSz = sizeof(sig);
ret = crypto_ecc_sign(
kPrivKey, sizeof(kPrivKey), /* private key */
hash, sizeof(hash), /* computed hash digest */
sig, &sigSz, /* signature r/s */
ECC_KEY_SIZE, /* SECP256R1 curve size in bytes */
ECC_KEY_CURVE /* curve id */
);
}
if (ret == 0) {
/* Verify generated signature is valid */
ret = crypto_ecc_verify(
kPubKey, sizeof(kPubKey), /* public key point x/y */
hash, sizeof(hash), /* computed hash digest */
sig, sigSz, /* signature r/s */
ECC_KEY_SIZE, /* curve size in bytes */
ECC_KEY_CURVE /* curve id */
);
}
if (ret == 0) {
printf("Signature %d\n", sigSz);
print_hex(sig, sigSz);
printf("Success\n");
}
else {
printf("Failure %d: %s\n", ret, wc_GetErrorString(ret));
ret = -1;
}
return ret;
#else
printf("wolfSSL requires ECC and SHA512 and WOLFSSL_PUBLIC_MP\n");
return -1;
#endif
}
Reference in New Issue View Git Blame Copy Permalink