mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-14 03:30:02 +00:00
120 lines
3.5 KiB
C
120 lines
3.5 KiB
C
/**
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* Copyright (c) 2013 Tomas Dzetkulic
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* Copyright (c) 2013 Pavol Rusnak
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
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* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <openssl/ecdsa.h>
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#include <openssl/obj_mac.h>
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#include <openssl/sha.h>
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#include <stdio.h>
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#include <stdint.h>
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#include "ecdsa.h"
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#include "rand.h"
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int main()
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{
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uint8_t sig[64], pub_key33[33], pub_key65[65], priv_key[32], msg[256], buffer[1000], hash[32], *p;
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uint32_t i, j, msg_len;
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SHA256_CTX sha256;
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EC_GROUP *ecgroup;
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int cnt = 0;
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init_rand();
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ecgroup = EC_GROUP_new_by_curve_name(NID_secp256k1);
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for (;;) {
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// random message len between 1 and 256
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msg_len = (random32() & 0xFF) + 1;
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// create random message
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for (i = 0; i < msg_len; i++) {
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msg[i] = random32() & 0xFF;
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}
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// new ECDSA key
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EC_KEY *eckey = EC_KEY_new();
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EC_KEY_set_group(eckey, ecgroup);
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// generate the key
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EC_KEY_generate_key(eckey);
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// copy key to buffer
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p = buffer;
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i2d_ECPrivateKey(eckey, &p);
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// size of the key is in buffer[8] and the key begins right after that
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i = buffer[8];
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// extract key data
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if (i > 32) {
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for (j = 0; j < 32; j++) {
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priv_key[j] = buffer[j + i - 23];
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}
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} else {
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for (j = 0; j < 32 - i; j++) {
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priv_key[j] = 0;
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}
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for (j = 0; j < i; j++) {
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priv_key[j + 32 - i] = buffer[j + 9];
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}
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}
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// use our ECDSA signer to sign the message with the key
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if (ecdsa_sign(priv_key, msg, msg_len, sig) != 0) {
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printf("trezor-crypto signing failed\n");
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break;
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}
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// generate public key from private key
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ecdsa_get_public_key33(priv_key, pub_key33);
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ecdsa_get_public_key65(priv_key, pub_key65);
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// use our ECDSA verifier to verify the message signature
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if (ecdsa_verify(pub_key65, sig, msg, msg_len) != 0) {
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printf("trezor-crypto verification failed (pub_key_len = 65)\n");
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break;
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}
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if (ecdsa_verify(pub_key33, sig, msg, msg_len) != 0) {
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printf("trezor-crypto verification failed (pub_key_len = 33)\n");
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break;
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}
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// copy signature to the OpenSSL struct
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ECDSA_SIG *signature = ECDSA_SIG_new();
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BN_bin2bn(sig, 32, signature->r);
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BN_bin2bn(sig + 32, 32, signature->s);
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// compute the digest of the message
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SHA256_Init(&sha256);
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SHA256_Update(&sha256, msg, msg_len);
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SHA256_Final(hash, &sha256);
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// verify all went well, i.e. we can decrypt our signature with OpenSSL
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if (ECDSA_do_verify(hash, 32, signature, eckey) != 1) {
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printf("OpenSSL verification failed\n");
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break;
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}
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ECDSA_SIG_free(signature);
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EC_KEY_free(eckey);
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cnt++;
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if ((cnt % 100) == 0) printf("Passed ... %d\n", cnt);
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}
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EC_GROUP_free(ecgroup);
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return 0;
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}
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