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trezor-firmware/test_openssl.c
Pavol Rusnak a54c5fe89e
test_openssl: fix build with openssl 1.1.0+
OpenSSL 1.1.0 made R and S fields of ECDSA_SIG structure internal.
We need to use ECDSA_SIG_set0 function now. For some reason the test fails,
but previously the code was not even possible to compile with OpenSSL 1.1.0.

Still need to figure out why the test fails :-(
2018-01-07 21:51:33 +01:00

156 lines
4.6 KiB
C

/**
* Copyright (c) 2013-2014 Tomas Dzetkulic
* Copyright (c) 2013-2014 Pavol Rusnak
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/* OpenSSL's SHA256_CTX/SHA512_CTX conflicts with our own */
#define SHA256_CTX _openssl_SHA256_CTX
#define SHA512_CTX _openssl_SHA512_CTX
#include <openssl/bn.h>
#include <openssl/ecdsa.h>
#include <openssl/obj_mac.h>
#include <openssl/sha.h>
#include <openssl/opensslv.h>
#undef SHA256_CTX
#undef SHA512_CTX
#include <stdio.h>
#include <stdint.h>
#include "ecdsa.h"
#include "rand.h"
#include "hasher.h"
#include "nist256p1.h"
#include "secp256k1.h"
void openssl_check(unsigned int iterations, int nid, const ecdsa_curve *curve)
{
uint8_t sig[64], pub_key33[33], pub_key65[65], priv_key[32], msg[256], buffer[1000], hash[32], *p;
struct SHA256state_st sha256;
EC_GROUP *ecgroup;
ecgroup = EC_GROUP_new_by_curve_name(nid);
for (unsigned int iter = 0; iter < iterations; iter++) {
// random message len between 1 and 256
int msg_len = (random32() & 0xFF) + 1;
// create random message
random_buffer(msg, msg_len);
// new ECDSA key
EC_KEY *eckey = EC_KEY_new();
EC_KEY_set_group(eckey, ecgroup);
// generate the key
EC_KEY_generate_key(eckey);
// copy key to buffer
p = buffer;
i2d_ECPrivateKey(eckey, &p);
// size of the key is in buffer[8] and the key begins right after that
int s = buffer[8];
// extract key data
if (s > 32) {
for (int j = 0; j < 32; j++) {
priv_key[j] = buffer[j + s - 23];
}
} else {
for (int j = 0; j < 32 - s; j++) {
priv_key[j] = 0;
}
for (int j = 0; j < s; j++) {
priv_key[j + 32 - s] = buffer[j + 9];
}
}
// use our ECDSA signer to sign the message with the key
if (ecdsa_sign(curve, HASHER_SHA2, priv_key, msg, msg_len, sig, NULL, NULL) != 0) {
printf("trezor-crypto signing failed\n");
return;
}
// generate public key from private key
ecdsa_get_public_key33(curve, priv_key, pub_key33);
ecdsa_get_public_key65(curve, priv_key, pub_key65);
// use our ECDSA verifier to verify the message signature
if (ecdsa_verify(curve, HASHER_SHA2, pub_key65, sig, msg, msg_len) != 0) {
printf("trezor-crypto verification failed (pub_key_len = 65)\n");
return;
}
if (ecdsa_verify(curve, HASHER_SHA2, pub_key33, sig, msg, msg_len) != 0) {
printf("trezor-crypto verification failed (pub_key_len = 33)\n");
return;
}
// copy signature to the OpenSSL struct
ECDSA_SIG *signature = ECDSA_SIG_new();
#if OPENSSL_VERSION_NUMBER < 0x10100000L
BN_bin2bn(sig, 32, signature->r);
BN_bin2bn(sig + 32, 32, signature->s);
#else
BIGNUM *R = BN_bin2bn(sig, 32, NULL);
BIGNUM *S = BN_bin2bn(sig + 32, 32, NULL);
ECDSA_SIG_set0(signature, R, S);
#endif
// compute the digest of the message
// note: these are OpenSSL functions, not our own
SHA256_Init(&sha256);
SHA256_Update(&sha256, msg, msg_len);
SHA256_Final(hash, &sha256);
// verify all went well, i.e. we can decrypt our signature with OpenSSL
int v = ECDSA_do_verify(hash, 32, signature, eckey);
if (v != 1) {
printf("OpenSSL verification failed (%d)\n", v);
return;
}
ECDSA_SIG_free(signature);
EC_KEY_free(eckey);
if (((iter + 1) % 100) == 0) printf("Passed ... %d\n", iter + 1);
}
EC_GROUP_free(ecgroup);
printf("All OK\n");
}
int main(int argc, char *argv[])
{
if (argc != 2) {
printf("Usage: test_openssl iterations\n");
return 1;
}
unsigned int iterations;
sscanf(argv[1], "%u", &iterations);
printf("Testing secp256k1:\n");
openssl_check(iterations, NID_secp256k1, &secp256k1);
printf("Testing nist256p1:\n");
openssl_check(iterations, NID_X9_62_prime256v1, &nist256p1);
return 0;
}