X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=Novacoin%2FCKeyPair.cs;h=5dcedbb52455787e293a3dcd0f2bb3f5deb1783a;hb=1dcac5faa2b1477034f82466ffb16170fa2e9bb6;hp=a729d50dbe589c55553167671bdf56b7600eeeaa;hpb=be834adfb84c418d7915a186ee13651312eab1d1;p=NovacoinLibrary.git
diff --git a/Novacoin/CKeyPair.cs b/Novacoin/CKeyPair.cs
index a729d50..5dcedbb 100644
--- a/Novacoin/CKeyPair.cs
+++ b/Novacoin/CKeyPair.cs
@@ -1,18 +1,36 @@
-using System.Collections.Generic;
-using System.Linq;
-using System;
+/**
+ * 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 .
+ */
-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;
+using System.Diagnostics.Contracts;
namespace Novacoin
{
+
public class CKeyPair : CKey
{
private ECPrivateKeyParameters _Private;
@@ -20,12 +38,12 @@ namespace Novacoin
///
/// Initialize new CKeyPair instance with random secret.
///
- 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;
@@ -41,21 +59,23 @@ namespace Novacoin
///
/// Byte sequence
/// Compression flag
- public CKeyPair(IEnumerable secretBytes, bool Compressed=true)
+ public CKeyPair(byte[] secretBytes, bool Compressed=true)
{
+ Contract.Requires(secretBytes.Length == 32, "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 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);
@@ -70,34 +90,38 @@ namespace Novacoin
/// Init key pair using secret sequence of bytes
///
/// Byte sequence
- public CKeyPair(IEnumerable 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 rawBytes = AddressTools.Base58DecodeCheck(strBase58).ToList();
- rawBytes.RemoveAt(0); // Remove key version byte
+ var rawSecretBytes = AddressTools.Base58DecodeCheck(strBase58);
+
+ if (rawSecretBytes.Length != 33 && rawSecretBytes.Length != 34)
+ {
+ 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 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);
}
@@ -116,62 +140,61 @@ namespace Novacoin
///
/// Create signature for supplied data
///
- /// Data bytes sequence
+ /// Hash to sigh
/// Signature bytes sequence
- public IEnumerable Sign(IEnumerable data)
+ public byte[] Sign(uint256 sigHash)
{
- byte[] dataBytes = data.ToArray();
-
- ISigner signer = SignerUtilities.GetSigner("SHA-256withECDSA");
+ var signer = SignerUtilities.GetSigner("NONEwithECDSA");
signer.Init(true, _Private);
- signer.BlockUpdate(dataBytes, 0, dataBytes.Length);
+ signer.BlockUpdate(sigHash, 0, sigHash.Size);
return signer.GenerateSignature();
}
public CPubKey PubKey
{
- get { return new CPubKey(PublicBytes); }
+ get { return new CPubKey(_Public.Q.GetEncoded()); }
}
///
/// SecretBytes part of key pair
///
- public IEnumerable SecretBytes
+ public static implicit operator byte[] (CKeyPair kp)
{
- get
- {
- List secretBytes = new List(_Private.D.ToByteArray());
-
- if (secretBytes[0] == 0x00)
- {
- // Remove sign
- secretBytes.RemoveAt(0);
- }
+ var secretBytes = new List(kp._Private.D.ToByteArray());
- if (IsCompressed)
- {
- // Set compression flag
- secretBytes.Add(0x01);
- }
+ if (secretBytes.Count == 33 && secretBytes[0] == 0x00)
+ {
+ // Remove sign
+ secretBytes.RemoveAt(0);
+ }
- return secretBytes;
+ if (kp.IsCompressed)
+ {
+ // Set compression flag
+ secretBytes.Add(0x01);
}
+
+ return secretBytes.ToArray();
}
public string ToHex()
{
- return Interop.ToHex(SecretBytes);
+ return Interop.ToHex((byte[])this);
}
+ ///
+ /// Generate Base58 string in wallet import format
+ ///
+ ///
public override string ToString()
{
- List r = new List();
+ var r = new List();
r.Add((byte)(128 + AddrType.PUBKEY_ADDRESS)); // Key version
- r.AddRange(SecretBytes); // Key data
+ r.AddRange((byte[])this); // Key data
- return AddressTools.Base58EncodeCheck(r);
+ return AddressTools.Base58EncodeCheck(r.ToArray());
}
}
}