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);
}
bool DBBComServer::generateNewKey()
{
// generate new private key
btc_key key;
btc_privkey_init(&key);
btc_privkey_gen(&key);
assert(btc_privkey_is_valid(&key) == 1);
// derive pubkey
btc_pubkey pubkey;
btc_pubkey_init(&pubkey);
btc_pubkey_from_key(&key, &pubkey);
assert(btc_pubkey_is_valid(&pubkey) == 1);
// remove the current enc key
encryptionKey.clear();
// copy over the privatekey and clean libbtc privkey
std::copy(key.privkey,key.privkey+BTC_ECKEY_PKEY_LENGTH,std::back_inserter(encryptionKey));
btc_privkey_cleanse(&key);
// generate hash160(hash(pubkey))
// create base58c string with 0x91 as base58 identifier
size_t len = 67;
uint8_t hashout[32];
uint8_t hash160[21];
hash160[0] = CHANNEL_ID_BASE58_PREFIX;
btc_hash_sngl_sha256(pubkey.pubkey, BTC_ECKEY_COMPRESSED_LENGTH, hashout);
ripemd160(hashout, 32, hash160+1);
// make enought space for the base58c channel ID
channelID.resize(100);
int sizeOut = btc_base58_encode_check(hash160, 21, &channelID[0], channelID.size());
channelID.resize(sizeOut-1);
return true;
}
