-\feffusing System.Collections.Generic;
-using System.Linq;
-using System;
+\feff/**
+ * Novacoin classes library
+ * Copyright (C) 2015 Alex D. (balthazar.ad@gmail.com)
-using Org.BouncyCastle.Math;
-using Org.BouncyCastle.Math.EC;
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+
+ * This program 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 Affero General Public License for more details.
+
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Generators;
+
+using System.Security.Cryptography;
+
using Org.BouncyCastle.Crypto.Parameters;
+using Org.BouncyCastle.Math;
using Org.BouncyCastle.Security;
-
+using System.Collections.Generic;
+using System.Linq;
+using System;
namespace Novacoin
{
public class CKeyPair : CKey
{
private ECPrivateKeyParameters _Private;
+ private RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
/// <summary>
/// Initialize new CKeyPair instance with random secret.
/// </summary>
- public CKeyPair(bool Compressed=true)
+ public CKeyPair(bool Compressed = true)
{
- ECKeyGenerationParameters genParams = new ECKeyGenerationParameters(domain, new SecureRandom());
- ECKeyPairGenerator generator = new ECKeyPairGenerator("ECDSA");
+
+
+ var genParams = new ECKeyGenerationParameters(domain, new SecureRandom());
+ var generator = new ECKeyPairGenerator("ECDSA");
generator.Init(genParams);
- AsymmetricCipherKeyPair ecKeyPair = generator.GenerateKeyPair();
+ var ecKeyPair = generator.GenerateKeyPair();
_Private = (ECPrivateKeyParameters)ecKeyPair.Private;
_Public = (ECPublicKeyParameters)ecKeyPair.Public;
+ /*
+ BigInteger D;
+ var buffer1 = new byte[32];
+ var buffer2 = new byte[32];
+
+ do
+ {
+ rng.GetBytes(buffer1);
+ rng.GetNonZeroBytes(buffer2);
+
+ D = new BigInteger(Hash256.ComputeRaw256(ref buffer1, ref buffer2));
+
+ if (D.BitLength < 249)
+ System.Console.WriteLine(D.BitLength);
+ }
+ while (D.SignValue == -1);
+
+ var Q = curve.G.Multiply(D);
+
+ _Private = new ECPrivateKeyParameters(D, domain);
+ _Public = new ECPublicKeyParameters(Q, domain);
+ */
+
if (Compressed)
{
_Public = Compress(_Public);
/// </summary>
/// <param name="secretBytes">Byte sequence</param>
/// <param name="Compressed">Compression flag</param>
- public CKeyPair(IEnumerable<byte> secretBytes, bool Compressed=true)
+ public CKeyPair(byte[] secretBytes, bool Compressed=true)
{
+ if (secretBytes.Length != 32)
+ {
+ throw new ArgumentException("Serialized secret key must be 32 bytes long.");
+ }
+
// Deserialize secret value
- BigInteger D = new BigInteger(secretBytes.Take(32).ToArray());
+ var D = new BigInteger(secretBytes);
+ // Append with zero byte if necessary
if (D.SignValue == -1)
{
- List<byte> fixedKeyBytes = secretBytes.Take(32).ToList();
- fixedKeyBytes.Insert(0, 0x00); // prepend with sign byte
-
- D = new BigInteger(fixedKeyBytes.ToArray());
+ var positiveKeyBytes = new byte[33];
+ Array.Copy(secretBytes, 0, positiveKeyBytes, 1, 32);
+ D = new BigInteger(positiveKeyBytes);
}
// Calculate public key
- ECPoint Q = curve.G.Multiply(D);
+ var Q = curve.G.Multiply(D);
_Private = new ECPrivateKeyParameters(D, domain);
_Public = new ECPublicKeyParameters(Q, domain);
/// Init key pair using secret sequence of bytes
/// </summary>
/// <param name="secretBytes">Byte sequence</param>
- public CKeyPair(IEnumerable<byte> secretBytes) :
- this (secretBytes.Take(32), (secretBytes.Count() == 33 && secretBytes.Last() == 0x01))
+ public CKeyPair(byte[] secretBytes) :
+ this (secretBytes.Take(32).ToArray(), (secretBytes.Count() == 33 && secretBytes.Last() == 0x01))
{
}
public CKeyPair(string strBase58)
{
- List<byte> rawBytes = AddressTools.Base58DecodeCheck(strBase58).ToList();
- rawBytes.RemoveAt(0); // Remove key version byte
+ var rawSecretBytes = AddressTools.Base58DecodeCheck(strBase58);
+
+ if (rawSecretBytes.Length > 34 || rawSecretBytes.Length < 33)
+ {
+ throw new ArgumentException("Though you have provided a correct Base58 representation of some data, this data doesn't represent a valid private key.");
+ }
// Deserialize secret value
- BigInteger D = new BigInteger(rawBytes.Take(32).ToArray());
+ var D = new BigInteger(rawSecretBytes.Skip(1).Take(32).ToArray());
if (D.SignValue == -1)
{
- List<byte> secretbytes = rawBytes.Take(32).ToList(); // Copy secret
- secretbytes.Insert(0, 0x00); // Prepend with sign byte
+ var secretBytes = new byte[33];
+ Array.Copy(rawSecretBytes, 1, secretBytes, 1, 32); // Copying the privkey, 32 bytes starting from second byte of array
- D = new BigInteger(secretbytes.ToArray()); // Try decoding again
+ D = new BigInteger(secretBytes); // Try decoding again
}
// Calculate public key
- ECPoint Q = curve.G.Multiply(D);
+ var Q = curve.G.Multiply(D);
_Private = new ECPrivateKeyParameters(D, domain);
_Public = new ECPublicKeyParameters(Q, domain);
- if (rawBytes.Count == 33 && rawBytes.Last() == 0x01) // Check compression tag
+ if (rawSecretBytes.Length == 34 && rawSecretBytes.Last() == 0x01) // Check compression tag
{
_Public = Compress(_Public);
}
/// </summary>
/// <param name="data">Hash to sigh</param>
/// <returns>Signature bytes sequence</returns>
- public IEnumerable<byte> Sign(Hash sigHash)
+ public byte[] Sign(Hash sigHash)
{
- ISigner signer = SignerUtilities.GetSigner("NONEwithECDSA");
+ var signer = SignerUtilities.GetSigner("NONEwithECDSA");
signer.Init(true, _Private);
signer.BlockUpdate(sigHash.hashBytes, 0, sigHash.hashSize);
/// <summary>
/// SecretBytes part of key pair
/// </summary>
- public IEnumerable<byte> SecretBytes
+ public byte[] SecretBytes
{
get
{
- List<byte> secretBytes = new List<byte>(_Private.D.ToByteArray());
+ var secretBytes = new List<byte>(_Private.D.ToByteArray());
- if (secretBytes[0] == 0x00)
+ if (secretBytes.Count == 33 && secretBytes[0] == 0x00)
{
// Remove sign
secretBytes.RemoveAt(0);
secretBytes.Add(0x01);
}
- return secretBytes;
+ return secretBytes.ToArray();
}
}
return Interop.ToHex(SecretBytes);
}
+ /// <summary>
+ /// Generate Base58 string in wallet import format
+ /// </summary>
+ /// <returns></returns>
public override string ToString()
{
- List<byte> r = new List<byte>();
+ var r = new List<byte>();
r.Add((byte)(128 + AddrType.PUBKEY_ADDRESS)); // Key version
r.AddRange(SecretBytes); // Key data
- return AddressTools.Base58EncodeCheck(r);
+ return AddressTools.Base58EncodeCheck(r.ToArray());
}
}
}
git://git.novaco.in / NovacoinLibrary.git / blobdiff