btc_bool btc_privkey_verify_pubkey(btc_key* privkey, btc_pubkey* pubkey)
{
uint256 rnddata, hash;
assert(btc_random_bytes(rnddata, BTC_HASH_LENGTH, 0));
btc_hash(rnddata, BTC_HASH_LENGTH, hash);
unsigned char sig[74];
size_t siglen = 74;
if (!btc_key_sign_hash(privkey, hash, sig, &siglen))
return false;
return btc_pubkey_verify_sig(pubkey, hash, sig, siglen);
}
void test_ecc()
{
unsigned char r_buf[32];
memset(r_buf, 0, 32);
random_init();
while (btc_ecc_verify_privatekey(r_buf) == 0) {
random_bytes(r_buf, 32, 0);
}
memset(r_buf, 0xFF, 32);
u_assert_int_eq(btc_ecc_verify_privatekey(r_buf), 0); //secp256k1 overflow
uint8_t pub_key33[33], pub_key33_invalid[33], pub_key65[65], pub_key65_invalid[65];
memcpy(pub_key33, utils_hex_to_uint8("02fcba7ecf41bc7e1be4ee122d9d22e3333671eb0a3a87b5cdf099d59874e1940f"), 33);
memcpy(pub_key33_invalid, utils_hex_to_uint8("999999999941bc7e1be4ee122d9d22e3333671eb0a3a87b5cdf099d59874e1940f"), 33);
memcpy(pub_key65, utils_hex_to_uint8("044054fd18aeb277aeedea01d3f3986ff4e5be18092a04339dcf4e524e2c0a09746c7083ed2097011b1223a17a644e81f59aa3de22dac119fd980b36a8ff29a244"), 65);
memcpy(pub_key65_invalid, utils_hex_to_uint8("044054fd18aeb277aeedea01d3f3986ff4e5be18092a04339dcf4e524e2c0a09746c7083ed2097011b1223a17a644e81f59aa3de22dac119fd980b39999f29a244"), 65);
u_assert_int_eq(btc_ecc_verify_pubkey(pub_key33, 1), 1);
u_assert_int_eq(btc_ecc_verify_pubkey(pub_key65, 0), 1);
u_assert_int_eq(btc_ecc_verify_pubkey(pub_key33_invalid, 1), 0);
u_assert_int_eq(btc_ecc_verify_pubkey(pub_key65_invalid, 0), 0);
btc_key key;
btc_privkey_init(&key);
assert(btc_privkey_is_valid(&key) == 0);
btc_privkey_gen(&key);
uint8_t* hash = utils_hex_to_uint8((const char*)"26db47a48a10b9b0b697b793f5c0231aa35fe192c9d063d7b03a55e3c302850a");
unsigned char sig[74];
size_t outlen = 74;
btc_key_sign_hash(&key, hash, sig, &outlen);
uint8_t sigcomp[64];
unsigned char sigder[74];
size_t sigderlen = 74;
u_assert_int_eq(btc_ecc_der_to_compact(sig, outlen, sigcomp), true);
u_assert_int_eq(btc_ecc_compact_to_der_normalized(sigcomp, sigder, &sigderlen), true);
u_assert_int_eq(outlen, sigderlen);
u_assert_int_eq(memcmp(sig,sigder,sigderlen), 0);
}