public static ECKeyPair FromPrivateKey(byte[] privateKey)
{
if (privateKey == null || privateKey.Length != 32)
{
throw new InvalidPrivateKeyException(
$"Private key has to have length of 32. Current length is {privateKey?.Length}.");
}
try
{
Lock.AcquireWriterLock(Timeout.Infinite);
var secp256K1PubKey = new byte[64];
if (!Secp256K1.PublicKeyCreate(secp256K1PubKey, privateKey))
{
throw new InvalidPrivateKeyException("Create public key failed.");
}
var pubKey = new byte[Secp256k1.SERIALIZED_UNCOMPRESSED_PUBKEY_LENGTH];
if (!Secp256K1.PublicKeySerialize(pubKey, secp256K1PubKey))
{
throw new PublicKeyOperationException("Serialize public key failed.");
}
return(new ECKeyPair(privateKey, pubKey));
}
finally
{
Lock.ReleaseWriterLock();
}
}
static void Main(string[] args)
{
// Create a secp256k1 context (ensure disposal to prevent unmanaged memory leaks).
using (var secp256k1 = new Secp256k1())
{
// Generate a private key.
var privateKey = new byte[32];
var rnd = System.Security.Cryptography.RandomNumberGenerator.Create();
do
{
rnd.GetBytes(privateKey);
}while (!secp256k1.SecretKeyVerify(privateKey));
// Create public key from private key.
var publicKey = new byte[64];
Debug.Assert(secp256k1.PublicKeyCreate(publicKey, privateKey));
// Sign a message hash.
var messageBytes = Encoding.UTF8.GetBytes("Hello world.");
var messageHash = System.Security.Cryptography.SHA256.Create().ComputeHash(messageBytes);
var signature = new byte[64];
Debug.Assert(secp256k1.Sign(signature, messageHash, privateKey));
// Serialize a DER signature from ECDSA signature
byte[] signatureDer = new byte[Secp256k1.SERIALIZED_DER_SIGNATURE_MAX_SIZE];
int outL = 0;
Debug.Assert(secp256k1.SignatureSerializeDer(signatureDer, signature, out outL));
Array.Resize(ref signatureDer, outL);
// Verify message hash.
Debug.Assert(secp256k1.Verify(signature, messageHash, publicKey));
}
}
static void Main(string[] args)
{
// Create a secp256k1 context (ensure disposal to prevent unmanaged memory leaks).
using (var secp256k1 = new Secp256k1())
{
// Generate a private key.
var privateKey = new byte[32];
var rnd = System.Security.Cryptography.RandomNumberGenerator.Create();
do
{
rnd.GetBytes(privateKey);
}while (!secp256k1.SecretKeyVerify(privateKey));
// Create public key from private key.
var publicKey = new byte[64];
Debug.Assert(secp256k1.PublicKeyCreate(publicKey, privateKey));
// Sign a message hash.
var messageBytes = Encoding.UTF8.GetBytes("Hello world.");
var messageHash = System.Security.Cryptography.SHA256.Create().ComputeHash(messageBytes);
var signature = new byte[64];
Debug.Assert(secp256k1.Sign(signature, messageHash, privateKey));
// Verify message hash.
Debug.Assert(secp256k1.Verify(signature, messageHash, publicKey));
}
}
public void Sign_With_PubKey_From_Commitment()
{
using (var secp256k1 = new Secp256k1())
using (var pedersen = new Pedersen())
{
string ToHex(byte[] data)
{
return(BitConverter.ToString(data).Replace("-", string.Empty));
}
var blinding = secp256k1.GetSecretKey();
var commit = pedersen.Commit(0, blinding);
var msg = "Message for signing";
var msgBytes = Encoding.UTF8.GetBytes(msg);
var msgHash = System.Security.Cryptography.SHA256.Create().ComputeHash(msgBytes);
var sig = secp256k1.Sign(msgHash, blinding);
var pubKey = pedersen.ToPublicKey(commit);
Assert.True(secp256k1.Verify(sig, msgHash, pubKey));
var actualPubKey = secp256k1.PublicKeyCreate(blinding);
Assert.Equal(ToHex(pubKey), ToHex(actualPubKey));
}
}
static void TestToPublicKey()
{
using (var secp256k1 = new Secp256k1())
using (var pedersen = new Pedersen())
{
var blinding = secp256k1.GetSecretKey();
var commitPos = pedersen.Commit(0, blinding);
var commitNeg = pedersen.Commit(0, blinding);
var blindSum = pedersen.BlindSum(new List <byte[]> {
blinding, blinding
}, new List <byte[]> {
});
var commitSum = pedersen.CommitSum(new List <byte[]> {
commitPos
}, new List <byte[]> {
commitNeg
});
var msg = "Message for signing";
var msgBytes = Encoding.UTF8.GetBytes(msg);
var msgHash = System.Security.Cryptography.SHA256.Create().ComputeHash(msgBytes);
var sig = secp256k1.Sign(msgHash, blinding);
var pubKey = pedersen.ToPublicKey(commitSum);
var verified1 = secp256k1.Verify(sig, msgHash, pubKey);
var pub = secp256k1.PublicKeyCreate(blinding);
}
}
private static byte[] _PrivToPubKey(byte[] privKey)
{
using (var secp256K1 = new Secp256k1())
{
var pubKey = new byte[64];
secp256K1.PublicKeyCreate(pubKey, privKey);
return(pubKey);
}
}
public byte[] ComputePublicKey(byte[] privateKey, bool compress = true)
{
if (privateKey.Length != 32)
{
throw new ArgumentException(nameof(privateKey));
}
var publicKey = new byte[64];
var result = new byte[33];
if (!Secp256K1.PublicKeyCreate(publicKey, privateKey))
{
throw new ArgumentException("Bad private key");
}
if (!Secp256K1.PublicKeySerialize(result, publicKey, Flags.SECP256K1_EC_COMPRESSED))
{
throw new ArgumentException("Bad public key");
}
return(result);
}
public static byte[] GetPublicKey(byte[] privateKey)
{
using (var secp256k1 = new Secp256k1())
{
var publicKey = new byte[64];
secp256k1.PublicKeyCreate(publicKey, privateKey);
return(publicKey);
}
}
public void SetupSign()
{
signature = new byte[64];
SetupGenerateKey();
Span <byte> sk = new byte[64];
sk = privateKey;
Span <byte> pk = new byte[64];
secp256k1.PublicKeyCreate(pk, sk);
publicKey = pk.ToArray();
Span <byte> m = new byte[32];
Random.NextBytes(m);
message = m.ToArray();
}
public static KeyPair GenerateKeyPair(Secp256k1 secp256k1)
{
var privateKey = GeneratePrivateKey(secp256k1);
byte[] publicKey = new byte[64];
if (!secp256k1.PublicKeyCreate(publicKey, privateKey))
{
throw new Exception("Public key creation failed");
}
return(new KeyPair {
PrivateKey = Convert.ToBase64String(privateKey), PublicKey = Convert.ToBase64String(publicKey)
});
}
public static ECKeyPair FromPrivateKey(byte[] privateKey)
{
if (privateKey == null || privateKey.Length != 32)
{
throw new ArgumentException("Private key has to have length of 32.");
}
try
{
Lock.AcquireWriterLock(Timeout.Infinite);
var secp256K1PubKey = new byte[64];
Secp256K1.PublicKeyCreate(secp256K1PubKey, privateKey);
var pubKey = new byte[Secp256k1.SERIALIZED_UNCOMPRESSED_PUBKEY_LENGTH];
Secp256K1.PublicKeySerialize(pubKey, secp256K1PubKey);
return(new ECKeyPair(privateKey, pubKey));
}
finally
{
Lock.ReleaseWriterLock();
}
}
//private int SerializedPublicKeyLength => IsCompressed ? Secp256k1.SERIALIZED_COMPRESSED_PUBKEY_LENGTH : Secp256k1.SERIALIZED_UNCOMPRESSED_PUBKEY_LENGTH;
public static PublicKey CreatePublicKey(this PrivateKey privateKey)
{
Trace.Assert(privateKey.IsValid);
var pubKeySecp256k1 = new byte[Secp256k1.PUBKEY_LENGTH];
var ok = Library.PublicKeyCreate(pubKeySecp256k1, privateKey.Bytes);
Trace.Assert(ok);
var pubKey = new PublicKey(privateKey.IsCompressed);
LazySecpLibrary.Value.PublicKeySerialize((ByteSpan)pubKey, pubKeySecp256k1, privateKey.IsCompressed ? Flags.SECP256K1_EC_COMPRESSED : Flags.SECP256K1_EC_UNCOMPRESSED);
Trace.Assert(pubKey.IsValid);
return(pubKey);
}
public string GetPublicKey(string privateKey)
{
var secp256k1 = new Secp256k1();
var publicKey = new byte[64];
if (secp256k1.PublicKeyCreate(publicKey, HexStringToByteArray(privateKey)))
{
return(ByteArrayToHexString(publicKey));
}
else
{
return(null);
}
}
public void CalculateSharedSecretWithSelfPubKey()
{
using (var secp256k1 = new Secp256k1())
{
Span <byte> privateKey = "90cc2eb9f4ac1562546c9899b5a68fc98a8add85a606abd506058e75ce583f49".HexToBytes();
Span <byte> publicKey = stackalloc byte[64];
Span <byte> sharedSecret = stackalloc byte[32];
secp256k1.PublicKeyCreate(publicKey, privateKey);
secp256k1.CalculateSharedSecret(sharedSecret, publicKey, privateKey);
Assert.Equal(32, sharedSecret.Length);
Assert.Equal("3e9a315412415ab738658e7f2119c434e7c2112862315d0af756d03d923874ae", sharedSecret.ToHexString());
}
}
public void CalculateSharedSecretWithAnotherPubKey()
{
using (var secp256k1 = new Secp256k1())
{
Span <byte> privateKey = "90cc2eb9f4ac1562546c9899b5a68fc98a8add85a606abd506058e75ce583f49".HexToBytes();
Span <byte> privateKey2 = "e815acba8fcf085a0b4141060c13b8017a08da37f2eb1d6a5416adbb621560ef".HexToBytes();
Span <byte> publicKey = stackalloc byte[64];
Span <byte> sharedSecret = stackalloc byte[32];
secp256k1.PublicKeyCreate(publicKey, privateKey2);
secp256k1.CalculateSharedSecret(sharedSecret, publicKey, privateKey);
Assert.Equal(32, sharedSecret.Length);
Assert.Equal("8fd6cc22898c5bddf1b6e596f131cea5f09ef2122f57852a90137959101bace1", sharedSecret.ToHexString());
}
}
public void KeyPairGeneration()
{
var secp256k1 = new Secp256k1();
var rnd = System.Security.Cryptography.RandomNumberGenerator.Create();
Span <byte> privateKey = new byte[32];
do
{
rnd.GetBytes(privateKey.ToArray());
}while (!secp256k1.SecretKeyVerify(privateKey));
Span <byte> publicKey = new byte[64];
if (!secp256k1.PublicKeyCreate(publicKey, privateKey))
{
throw new Exception("Public key creation failed");
}
}
public static Dictionary <byte[], byte[]> GenKeyPairs(int count)
{
var keyPairs = new Dictionary <byte[], byte[]>();
for (var i = 0; i < count; i++)
{
var privateKey = new byte[32];
var rnd = RandomNumberGenerator.Create();
rnd.GetBytes(privateKey);
var publicKey = new byte[64];
// using (var secp256K1 = new Secp256k1())
lock (secp256K1)
{
Debug.Assert(secp256K1.PublicKeyCreate(publicKey, privateKey));
}
keyPairs.Add(publicKey, privateKey);
}
return(keyPairs);
}
public void SignTransaction(string secretKey)
{
var secp256k1 = new Secp256k1();
Span <byte> publicKey = new byte[64];
secp256k1.PublicKeyCreate(publicKey, secretKey.ToBytes());
//As only wallet owner can sign it's own transactions so
//Public key genrated from secretKey must be equal to sender's wallet address (i.e. FromAddress)
if (!publicKey.ToHex().Equals(FromAddress))
{
throw new Exception("You cannot sign transactions for other wallets.");
}
var txHash = CalculateHash();
Span <byte> signature = new byte[64];
secp256k1.Sign(signature, txHash, secretKey.ToBytes());
Signature = signature.ToArray();
}
//Ignore this function as this is just to create Public Private key pairs for testing
public static void GenerateKeys()
{
using (var secp256k1 = new Secp256k1())
{
// privatekey= "105c301c92f5d956ad577105e71aba4d29cf7af04cd47c648244dd8ad677381f"
// publickey = "7a89dec4cc7e0964ed4c5e517f1cfee7e4f145e8500f55fe0317f97e71b7ba5219a4215b1885ac547da87bd0155d02c9bbe0501d0670a4f481df2b42f2130c02"
// Generate a private key.
var privateKey = new byte[32];
var rnd = System.Security.Cryptography.RandomNumberGenerator.Create();
do
{
rnd.GetBytes(privateKey);
}while (!secp256k1.SecretKeyVerify(privateKey));
var prk = ToHex(privateKey);
// Create public key from private key.
var publicKey = new byte[64];
Debug.Assert(secp256k1.PublicKeyCreate(publicKey, privateKey));
var pbk = ToHex(publicKey);
// Sign a message hash.
var messageBytes = Encoding.UTF8.GetBytes("Hello world.");
var messageHash = System.Security.Cryptography.SHA256.Create().ComputeHash(messageBytes);
var signature = new byte[64];
Debug.Assert(secp256k1.Sign(signature, messageHash, privateKey));
// Serialize a DER signature from ECDSA signature
byte[] signatureDer = new byte[Secp256k1.SERIALIZED_DER_SIGNATURE_MAX_SIZE];
int outL = 0;
Debug.Assert(secp256k1.SignatureSerializeDer(signatureDer, signature, out outL));
Array.Resize(ref signatureDer, outL);
// Verify message hash.
Debug.Assert(secp256k1.Verify(signature, messageHash, publicKey));
}
}
public static void CloudKeygen(int n, int f, IEnumerable <string> ips, ushort basePort, ushort target, ulong chainId, ulong cycleDuration, ulong validatorsCount, string networkName,
string feedAddress, string feedBalance, string stakeAmount, IEnumerable <ulong> hardforks)
{
if (n <= 3 * f)
{
throw new Exception("N must be >= 3 * F + 1");
}
var tpkeKeyGen = new Crypto.TPKE.TrustedKeyGen(n, f);
var tpkePubKey = tpkeKeyGen.GetPubKey();
var sigKeyGen = new Crypto.ThresholdSignature.TrustedKeyGen(n, f);
var privShares = sigKeyGen.GetPrivateShares().ToArray();
var pubShares = sigKeyGen.GetPrivateShares()
.Select(s => s.GetPublicKeyShare())
.Select(s => s.ToHex())
.ToArray();
var ecdsaPrivateKeys = new string[n];
var ecdsaPublicKeys = new string[n];
var addresses = new string[n];
var crypto = CryptoProvider.GetCrypto();
for (var i = 0; i < n; ++i)
{
ecdsaPrivateKeys[i] = crypto.GenerateRandomBytes(32).ToHex(false);
ecdsaPublicKeys[i] = crypto.ComputePublicKey(ecdsaPrivateKeys[i].HexToBytes(), true).ToHex(false);
addresses[i] = ecdsaPrivateKeys[i].HexToBytes().ToPrivateKey().GetPublicKey().GetAddress().ToHex();
}
var hubPublicKeys = new string[n];
var serializedHubPrivateKeys = new string[n];
for (var i = 0; i < n; ++i)
{
(serializedHubPrivateKeys[i], hubPublicKeys[i]) = PrivateWallet.GenerateHubKey();
}
var bootstraps = ips
.Zip(hubPublicKeys, (ip, id) => $"{id}@{ip}")
.Select((x, i) => $"{x}:{41011 + i}")
.ToArray();
var peers = ecdsaPublicKeys.ToArray();
for (var i = 0; i < n; ++i)
{
var net = new NetworkConfig
{
Peers = peers,
MaxPeers = 100,
ForceIPv6 = false,
BootstrapAddresses = bootstraps,
HubLogLevel = "Trace",
HubMetricsPort = basePort + 2,
NetworkName = networkName,
ChainId = (int)chainId,
CycleDuration = cycleDuration,
ValidatorsCount = validatorsCount,
};
var genesis = new GenesisConfig(tpkePubKey.ToHex(), "5.000000000000000000", "0.000000100000000000")
{
Balances = new Dictionary <string, string>
{
{
feedAddress, feedBalance
}
},
Validators = Enumerable.Range(0, n).Select(j => new ValidatorInfo(
ecdsaPublicKeys[j], pubShares[j], feedAddress, stakeAmount
)).ToList()
};
for (var j = 0; j < n; ++j)
{
genesis.Balances[addresses[j]] = "100";
}
var secp256K1 = new Secp256k1();
var privateKey = new byte[32];
var rnd = System.Security.Cryptography.RandomNumberGenerator.Create();
do
{
rnd.GetBytes(privateKey);
}while (!secp256K1.SecretKeyVerify(privateKey));
var privateKeyHex = privateKey.ToHex();
var publicKey = new byte[64];
Debug.Assert(secp256K1.PublicKeyCreate(publicKey, privateKey));
var publicKeyHex = publicKey.ToHex();
System.Console.WriteLine($"Loop {i + 1:D2}: private key [{privateKeyHex}] associated with public key [{publicKeyHex}]");
var rpc = new RpcConfig
{
Hosts = new[] { "+" },
Port = basePort,
MetricsPort = (ushort)(basePort + 1),
// ApiKey = "0x2e917846fe7487a4ea3a765473a3fc9b2d9227a4d312bc77fb9de357cf73d7e52b771d537394336e9eb2cb4838138f668f4bd7d8cf7e04d9242a42c71b99f166",
ApiKey = publicKeyHex
};
var walletPath = "wallet.json";
var vault = new VaultConfig
{
Path = walletPath,
Password = getRandomPassword()
};
var storage = new StorageConfig
{
Path = "ChainLachain",
Provider = "RocksDB",
};
var blockchain = new BlockchainConfig
{
TargetBlockTime = target,
};
List <ulong> hardforkHeights = hardforks.ToList();
var hardfork = new HardforkConfig
{
Hardfork_1 = hardforkHeights[0],
Hardfork_2 = hardforkHeights[1],
Hardfork_3 = hardforkHeights[2],
Hardfork_4 = hardforkHeights[3],
};
var version = new VersionConfig
{
Version = 2
};
var blockHeight = new CacheOptions
{
SizeLimit = 100
};
var cache = new CacheConfig
{
BlockHeight = blockHeight
};
var config = new Config(net, genesis, rpc, vault, storage, blockchain, hardfork, version, cache);
File.WriteAllText($"config{i + 1:D2}.json", JsonConvert.SerializeObject(config, Formatting.Indented));
GenWallet(
$"wallet{i + 1:D2}.json",
ecdsaPrivateKeys[i],
serializedHubPrivateKeys[i],
tpkeKeyGen.GetPrivKey(i).ToHex(),
privShares[i].ToHex(),
vault.Password
);
}
var tpkePrivKeys = string.Join(
", ",
Enumerable.Range(0, n)
.Select(idx => tpkeKeyGen.GetPrivKey(idx))
.Select(x => $"\"{x.ToHex()}\""));
var tsKeys = string.Join(
", ",
sigKeyGen.GetPrivateShares()
.Select(x => $"(\"{x.GetPublicKeyShare().ToHex()}\", \"{x.ToHex()}\")")
);
System.Console.WriteLine(
$"{n}: " + "{" +
" \"tpke\": (" +
$" \"{tpkePubKey.ToHex()}\"," +
$" [{tpkePrivKeys}]" +
" )," +
$" \"ts\": [{tsKeys}]," +
"}");
System.Console.WriteLine(
string.Join(", ", ecdsaPrivateKeys.Zip(ecdsaPublicKeys).Zip(addresses)
.Select(t => $"(\"{t.First.Second}\", \"{t.First.First}\", \"{t.Second}\")"))
);
}
public static PublicKey FromPrivateKey(byte[] secretKey)
{
return(new PublicKey(Secp256k1.PublicKeyCreate(secretKey)));
}