solidity/crypto.cpp

318 lines
9.9 KiB
C++

/*
This file is part of cpp-ethereum.
cpp-ethereum 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 3 of the License, or
(at your option) any later version.
cpp-ethereum 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 cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file crypto.cpp
* @author Gav Wood <i@gavwood.com>
* @date 2014
* Crypto test functions.
*/
#include <random>
#include <secp256k1/secp256k1.h>
#include <libdevcore/Common.h>
#include <libdevcore/RLP.h>
#include <libdevcore/Log.h>
#include <libethereum/Transaction.h>
#include <boost/test/unit_test.hpp>
#include "TestHelperCrypto.h"
using namespace std;
using namespace dev;
namespace dev
{
namespace crypto
{
inline CryptoPP::AutoSeededRandomPool& PRNG() {
static CryptoPP::AutoSeededRandomPool prng;
return prng;
}
}
}
using namespace CryptoPP;
BOOST_AUTO_TEST_SUITE(crypto)
BOOST_AUTO_TEST_CASE(cryptopp_ecies_message)
{
cnote << "Testing cryptopp_ecies_message...";
string const message("Now is the time for all good men to come to the aide of humanity.");
AutoSeededRandomPool prng;
ECIES<ECP>::Decryptor localDecryptor(prng, ASN1::secp256r1());
SavePrivateKey(localDecryptor.GetPrivateKey());
ECIES<ECP>::Encryptor localEncryptor(localDecryptor);
SavePublicKey(localEncryptor.GetPublicKey());
ECIES<ECP>::Decryptor futureDecryptor;
LoadPrivateKey(futureDecryptor.AccessPrivateKey());
futureDecryptor.GetPrivateKey().ThrowIfInvalid(prng, 3);
ECIES<ECP>::Encryptor futureEncryptor;
LoadPublicKey(futureEncryptor.AccessPublicKey());
futureEncryptor.GetPublicKey().ThrowIfInvalid(prng, 3);
// encrypt/decrypt with local
string cipherLocal;
StringSource ss1 (message, true, new PK_EncryptorFilter(prng, localEncryptor, new StringSink(cipherLocal) ) );
string plainLocal;
StringSource ss2 (cipherLocal, true, new PK_DecryptorFilter(prng, localDecryptor, new StringSink(plainLocal) ) );
// encrypt/decrypt with future
string cipherFuture;
StringSource ss3 (message, true, new PK_EncryptorFilter(prng, futureEncryptor, new StringSink(cipherFuture) ) );
string plainFuture;
StringSource ss4 (cipherFuture, true, new PK_DecryptorFilter(prng, futureDecryptor, new StringSink(plainFuture) ) );
// decrypt local w/future
string plainFutureFromLocal;
StringSource ss5 (cipherLocal, true, new PK_DecryptorFilter(prng, futureDecryptor, new StringSink(plainFutureFromLocal) ) );
// decrypt future w/local
string plainLocalFromFuture;
StringSource ss6 (cipherFuture, true, new PK_DecryptorFilter(prng, localDecryptor, new StringSink(plainLocalFromFuture) ) );
assert(plainLocal == message);
assert(plainFuture == plainLocal);
assert(plainFutureFromLocal == plainLocal);
assert(plainLocalFromFuture == plainLocal);
}
BOOST_AUTO_TEST_CASE(cryptopp_ecdh_prime)
{
cnote << "Testing cryptopp_ecdh_prime...";
using namespace CryptoPP;
OID curve = ASN1::secp256r1();
ECDH<ECP>::Domain dhLocal(curve);
SecByteBlock privLocal(dhLocal.PrivateKeyLength());
SecByteBlock pubLocal(dhLocal.PublicKeyLength());
dhLocal.GenerateKeyPair(dev::crypto::PRNG(), privLocal, pubLocal);
ECDH<ECP>::Domain dhRemote(curve);
SecByteBlock privRemote(dhRemote.PrivateKeyLength());
SecByteBlock pubRemote(dhRemote.PublicKeyLength());
dhRemote.GenerateKeyPair(dev::crypto::PRNG(), privRemote, pubRemote);
assert(dhLocal.AgreedValueLength() == dhRemote.AgreedValueLength());
// local: send public to remote; remote: send public to local
// Local
SecByteBlock sharedLocal(dhLocal.AgreedValueLength());
assert(dhLocal.Agree(sharedLocal, privLocal, pubRemote));
// Remote
SecByteBlock sharedRemote(dhRemote.AgreedValueLength());
assert(dhRemote.Agree(sharedRemote, privRemote, pubLocal));
// Test
Integer ssLocal, ssRemote;
ssLocal.Decode(sharedLocal.BytePtr(), sharedLocal.SizeInBytes());
ssRemote.Decode(sharedRemote.BytePtr(), sharedRemote.SizeInBytes());
assert(ssLocal != 0);
assert(ssLocal == ssRemote);
}
BOOST_AUTO_TEST_CASE(cryptopp_ecdh_aes128_cbc_noauth)
{
// ECDH gives 256-bit shared while aes uses 128-bits
// Use first 128-bits of shared secret as symmetric key
// IV is 0
// New connections require new ECDH keypairs
}
BOOST_AUTO_TEST_CASE(cryptopp_eth_fbba)
{
// Initial Authentication:
//
// New/Known Peer:
// pubkeyL = knownR? ? myKnown : myECDH
// pubkeyR = knownR? ? theirKnown : theirECDH
//
// Initial message = hmac(k=sha3(shared-secret[128..255]), address(pubkeyL)) || ECIES encrypt(pubkeyR, pubkeyL)
//
// Key Exchange (this could occur after handshake messages):
// If peers do not know each other they will need to exchange public keys.
//
// Drop ECDH (this could occur after handshake messages):
// After authentication and/or key exchange, both sides generate shared key
// from their 'known' keys and use this to encrypt all future messages.
//
// v2: If one side doesn't trust the other then a single-use key maybe sent.
// This will need to be tracked for future connections; when non-trusting peer
// wants to trust the other, it can request that it's old, 'new', public key be
// accepted. And, if the peer *really* doesn't trust the other side, it can request
// that a new, 'new', public key be accepted.
//
// Handshake (all or nothing, padded):
// All Peers (except blacklisted):
//
//
// New Peer:
//
//
// Known Untrusted Peer:
//
//
// Known Trusted Peer:
//
//
// Blacklisted Peeer:
// Already dropped by now.
//
//
// MAC:
// ...
}
BOOST_AUTO_TEST_CASE(eth_keypairs)
{
cnote << "Testing Crypto...";
secp256k1_start();
KeyPair p(Secret(fromHex("3ecb44df2159c26e0f995712d4f39b6f6e499b40749b1cf1246c37f9516cb6a4")));
BOOST_REQUIRE(p.pub() == Public(fromHex("97466f2b32bc3bb76d4741ae51cd1d8578b48d3f1e68da206d47321aec267ce78549b514e4453d74ef11b0cd5e4e4c364effddac8b51bcfc8de80682f952896f")));
BOOST_REQUIRE(p.address() == Address(fromHex("8a40bfaa73256b60764c1bf40675a99083efb075")));
{
eth::Transaction t;
t.nonce = 0;
t.receiveAddress = h160(fromHex("944400f4b88ac9589a0f17ed4671da26bddb668b"));
t.value = 1000;
auto rlp = t.rlp(false);
cnote << RLP(rlp);
cnote << toHex(rlp);
cnote << t.sha3(false);
t.sign(p.secret());
rlp = t.rlp(true);
cnote << RLP(rlp);
cnote << toHex(rlp);
cnote << t.sha3(true);
BOOST_REQUIRE(t.sender() == p.address());
}
}
int cryptoTest()
{
cnote << "Testing Crypto...";
secp256k1_start();
KeyPair p(Secret(fromHex("3ecb44df2159c26e0f995712d4f39b6f6e499b40749b1cf1246c37f9516cb6a4")));
assert(p.pub() == Public(fromHex("97466f2b32bc3bb76d4741ae51cd1d8578b48d3f1e68da206d47321aec267ce78549b514e4453d74ef11b0cd5e4e4c364effddac8b51bcfc8de80682f952896f")));
assert(p.address() == Address(fromHex("8a40bfaa73256b60764c1bf40675a99083efb075")));
{
eth::Transaction t;
t.nonce = 0;
t.receiveAddress = h160(fromHex("944400f4b88ac9589a0f17ed4671da26bddb668b"));
t.value = 1000;
auto rlp = t.rlp(false);
cnote << RLP(rlp);
cnote << toHex(rlp);
cnote << t.sha3(false);
t.sign(p.secret());
rlp = t.rlp(true);
cnote << RLP(rlp);
cnote << toHex(rlp);
cnote << t.sha3(true);
assert(t.sender() == p.address());
}
#if 0
// Test transaction.
bytes tx = fromHex("88005401010101010101010101010101010101010101011f0de0b6b3a76400001ce8d4a5100080181c373130a009ba1f10285d4e659568bfcfec85067855c5a3c150100815dad4ef98fd37cf0593828c89db94bd6c64e210a32ef8956eaa81ea9307194996a3b879441f5d");
cout << "TX: " << RLP(tx) << endl;
Transaction t2(tx);
cout << "SENDER: " << hex << t2.sender() << dec << endl;
secp256k1_start();
Transaction t;
t.nonce = 0;
t.value = 1; // 1 wei.
t.receiveAddress = toAddress(sha3("123"));
bytes sig64 = toBigEndian(t.vrs.r) + toBigEndian(t.vrs.s);
cout << "SIG: " << sig64.size() << " " << toHex(sig64) << " " << t.vrs.v << endl;
auto msg = t.rlp(false);
cout << "TX w/o SIG: " << RLP(msg) << endl;
cout << "RLP(TX w/o SIG): " << toHex(t.rlpString(false)) << endl;
std::string hmsg = sha3(t.rlpString(false), false);
cout << "SHA256(RLP(TX w/o SIG)): 0x" << toHex(hmsg) << endl;
bytes privkey = sha3Bytes("123");
{
bytes pubkey(65);
int pubkeylen = 65;
int ret = secp256k1_ecdsa_seckey_verify(privkey.data());
cout << "SEC: " << dec << ret << " " << toHex(privkey) << endl;
ret = secp256k1_ecdsa_pubkey_create(pubkey.data(), &pubkeylen, privkey.data(), 1);
pubkey.resize(pubkeylen);
int good = secp256k1_ecdsa_pubkey_verify(pubkey.data(), (int)pubkey.size());
cout << "PUB: " << dec << ret << " " << pubkeylen << " " << toHex(pubkey) << (good ? " GOOD" : " BAD") << endl;
}
// Test roundtrip...
{
bytes sig(64);
u256 nonce = 0;
int v = 0;
cout << toHex(hmsg) << endl;
cout << toHex(privkey) << endl;
cout << hex << nonce << dec << endl;
int ret = secp256k1_ecdsa_sign_compact((byte const*)hmsg.data(), (int)hmsg.size(), sig.data(), privkey.data(), (byte const*)&nonce, &v);
cout << "MYSIG: " << dec << ret << " " << sig.size() << " " << toHex(sig) << " " << v << endl;
bytes pubkey(65);
int pubkeylen = 65;
ret = secp256k1_ecdsa_recover_compact((byte const*)hmsg.data(), (int)hmsg.size(), (byte const*)sig.data(), pubkey.data(), &pubkeylen, 0, v);
pubkey.resize(pubkeylen);
cout << "MYREC: " << dec << ret << " " << pubkeylen << " " << toHex(pubkey) << endl;
}
{
bytes pubkey(65);
int pubkeylen = 65;
int ret = secp256k1_ecdsa_recover_compact((byte const*)hmsg.data(), (int)hmsg.size(), (byte const*)sig64.data(), pubkey.data(), &pubkeylen, 0, (int)t.vrs.v - 27);
pubkey.resize(pubkeylen);
cout << "RECPUB: " << dec << ret << " " << pubkeylen << " " << toHex(pubkey) << endl;
cout << "SENDER: " << hex << toAddress(dev::sha3(bytesConstRef(&pubkey).cropped(1))) << dec << endl;
}
#endif
return 0;
}
BOOST_AUTO_TEST_SUITE_END()