-\feffusing System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+\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 Org.BouncyCastle.Crypto.Parameters;
-
-using Org.BouncyCastle.Asn1.X9;
+using Org.BouncyCastle.Math;
using Org.BouncyCastle.Security;
-using Org.BouncyCastle.Asn1.Sec;
+using System.Collections.Generic;
+using System.Linq;
+
namespace Novacoin
{
- public class CKeyPair
+ public class CKeyPair : CKey
{
- private BigInteger D;
- private ECPoint Q;
-
- private static X9ECParameters curve = SecNamedCurves.GetByName("secp256k1");
- private static ECDomainParameters domain = new ECDomainParameters(curve.Curve, curve.G, curve.N, curve.H, curve.GetSeed());
+ private ECPrivateKeyParameters _Private;
/// <summary>
/// Initialize new CKeyPair instance with random secret.
/// </summary>
- public CKeyPair()
+ 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;
- Q = ((ECPublicKeyParameters)ecKeyPair.Public).Q;
- D = ((ECPrivateKeyParameters)ecKeyPair.Private).D;
+ if (Compressed)
+ {
+ _Public = Compress(_Public);
+ }
}
/// <summary>
/// Init key pair using secret sequence of bytes
/// </summary>
/// <param name="secretBytes">Byte sequence</param>
- public CKeyPair(IEnumerable<byte> secretBytes)
+ /// <param name="Compressed">Compression flag</param>
+ public CKeyPair(byte[] secretBytes, bool Compressed=true)
{
- D = new BigInteger(secretBytes.ToArray());
- Q = curve.G.Multiply(D);
+ // Deserialize secret value
+ var D = new BigInteger(secretBytes.Take(32).ToArray());
+
+ if (D.SignValue == -1)
+ {
+ var fixedKeyBytes = secretBytes.Take(32).ToList();
+ fixedKeyBytes.Insert(0, 0x00); // prepend with sign byte
+
+ D = new BigInteger(fixedKeyBytes.ToArray());
+ }
+
+ // Calculate public key
+ var Q = curve.G.Multiply(D);
+
+ _Private = new ECPrivateKeyParameters(D, domain);
+ _Public = new ECPublicKeyParameters(Q, domain);
+
+ if (Compressed)
+ {
+ _Public = Compress(_Public);
+ }
}
/// <summary>
- /// Create signature for supplied data
+ /// Init key pair using secret sequence of bytes
/// </summary>
- /// <param name="data">Data bytes sequence</param>
- /// <returns>Signature bytes sequence</returns>
- public IEnumerable<byte> Sign(IEnumerable<byte> data)
+ /// <param name="secretBytes">Byte sequence</param>
+ public CKeyPair(byte[] secretBytes) :
+ this (secretBytes.Take(32).ToArray(), (secretBytes.Count() == 33 && secretBytes.Last() == 0x01))
{
- byte[] dataBytes = data.ToArray();
-
- ISigner signer = SignerUtilities.GetSigner("SHA-256withECDSA");
- ECPrivateKeyParameters keyParameters = new ECPrivateKeyParameters(D, domain);
- signer.Init(true, keyParameters);
- signer.BlockUpdate(dataBytes, 0, dataBytes.Length);
-
- return signer.GenerateSignature();
}
- public bool Verify(IEnumerable<byte> data, IEnumerable<byte> signature)
+ public CKeyPair(string strBase58)
{
- byte[] dataBytes = data.ToArray();
+ var rawBytes = AddressTools.Base58DecodeCheck(strBase58).ToList();
+ rawBytes.RemoveAt(0); // Remove key version byte
- ISigner signer = SignerUtilities.GetSigner("SHA-256withECDSA");
- ECPublicKeyParameters keyParameters = new ECPublicKeyParameters(Q, domain);
- signer.Init(false, keyParameters);
- signer.BlockUpdate(dataBytes, 0, dataBytes.Length);
+ // Deserialize secret value
+ var D = new BigInteger(rawBytes.Take(32).ToArray());
- return signer.VerifySignature(signature.ToArray());
- }
+ if (D.SignValue == -1)
+ {
+ var secretbytes = rawBytes.Take(32).ToList(); // Copy secret
+ secretbytes.Insert(0, 0x00); // Prepend with sign byte
- public CPubKey GetPubKey()
- {
- return new CPubKey(Q);
+ D = new BigInteger(secretbytes.ToArray()); // Try decoding again
+ }
+
+ // Calculate public key
+ 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
+ {
+ _Public = Compress(_Public);
+ }
}
/// <summary>
- /// Calculate Hash160 and create new CKeyID instance.
+ /// Initialize a copy of CKeyPair instance
/// </summary>
- /// <returns>New key ID</returns>
- public CKeyID GetKeyID()
+ /// <param name="pair">CKyPair instance</param>
+ public CKeyPair(CKeyPair pair)
{
- return new CKeyID(Hash160.Compute160(Public));
+ _Public = pair._Public;
+ _Private = pair._Private;
}
/// <summary>
- /// Secret part of key pair
+ /// Create signature for supplied data
/// </summary>
- public IEnumerable<byte> Secret
+ /// <param name="data">Hash to sigh</param>
+ /// <returns>Signature bytes sequence</returns>
+ public byte[] Sign(Hash sigHash)
+ {
+ var signer = SignerUtilities.GetSigner("NONEwithECDSA");
+ signer.Init(true, _Private);
+ signer.BlockUpdate(sigHash.hashBytes, 0, sigHash.hashSize);
+
+ return signer.GenerateSignature();
+ }
+
+ public CPubKey PubKey
{
- get { return D.ToByteArray(); }
+ get { return new CPubKey(PublicBytes); }
}
/// <summary>
- /// Public part of key pair
+ /// SecretBytes part of key pair
/// </summary>
- public IEnumerable<byte> Public
+ public byte[] SecretBytes
+ {
+ get
+ {
+ var secretBytes = new List<byte>(_Private.D.ToByteArray());
+
+ if (secretBytes[0] == 0x00)
+ {
+ // Remove sign
+ secretBytes.RemoveAt(0);
+ }
+
+ if (IsCompressed)
+ {
+ // Set compression flag
+ secretBytes.Add(0x01);
+ }
+
+ return secretBytes.ToArray();
+ }
+ }
+
+ public string ToHex()
{
- get { return Q.GetEncoded(); }
+ return Interop.ToHex(SecretBytes);
}
public override string ToString()
{
- StringBuilder sb = new StringBuilder();
+ var r = new List<byte>();
- sb.AppendFormat("CKeyPair(Secret={0}, Public={1})", Interop.ToHex(Secret), Interop.ToHex(Public));
+ r.Add((byte)(128 + AddrType.PUBKEY_ADDRESS)); // Key version
+ r.AddRange(SecretBytes); // Key data
- return sb.ToString();
+ return AddressTools.Base58EncodeCheck(r.ToArray());
}
}
}
git://git.novaco.in / NovacoinLibrary.git / blobdiff