* 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.Security;
using System.Collections.Generic;
using System.Linq;
-
+using System;
+using System.Diagnostics.Contracts;
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)
{
-
-
var genParams = new ECKeyGenerationParameters(domain, new SecureRandom());
var generator = new ECKeyPairGenerator("ECDSA");
generator.Init(genParams);
_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);
/// <param name="Compressed">Compression flag</param>
public CKeyPair(byte[] secretBytes, bool Compressed=true)
{
+ Contract.Requires<ArgumentException>(secretBytes.Length == 32, "Serialized secret key must be 32 bytes long.");
+
// Deserialize secret value
- var D = new BigInteger(secretBytes.Take(32).ToArray());
+ var D = new BigInteger(secretBytes);
+ // Append with zero byte if necessary
if (D.SignValue == -1)
{
- var 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
public CKeyPair(string strBase58)
{
- var 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
- var D = new BigInteger(rawBytes.Take(32).ToArray());
+ var D = new BigInteger(rawSecretBytes.Skip(1).Take(32).ToArray());
if (D.SignValue == -1)
{
- var 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
_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 byte[] Sign(Hash sigHash)
+ public byte[] Sign(uint256 sigHash)
{
var signer = SignerUtilities.GetSigner("NONEwithECDSA");
signer.Init(true, _Private);
- signer.BlockUpdate(sigHash.hashBytes, 0, sigHash.hashSize);
+ signer.BlockUpdate(sigHash, 0, sigHash.Size);
return signer.GenerateSignature();
}
public CPubKey PubKey
{
- get { return new CPubKey(PublicBytes); }
+ get { return new CPubKey(_Public.Q.GetEncoded()); }
}
/// <summary>
/// SecretBytes part of key pair
/// </summary>
- public byte[] SecretBytes
+ public static implicit operator byte[] (CKeyPair kp)
{
- get
- {
- var secretBytes = new List<byte>(_Private.D.ToByteArray());
-
- if (secretBytes[0] == 0x00)
- {
- // Remove sign
- secretBytes.RemoveAt(0);
- }
+ var secretBytes = new List<byte>(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.ToArray();
+ if (kp.IsCompressed)
+ {
+ // Set compression flag
+ secretBytes.Add(0x01);
}
+
+ return secretBytes.ToArray();
}
public string ToHex()
{
- return Interop.ToHex(SecretBytes);
+ return Interop.ToHex((byte[])this);
}
+ /// <summary>
+ /// Generate Base58 string in wallet import format
+ /// </summary>
+ /// <returns></returns>
public override string ToString()
{
var r = new List<byte>();
r.Add((byte)(128 + AddrType.PUBKEY_ADDRESS)); // Key version
- r.AddRange(SecretBytes); // Key data
+ r.AddRange((byte[])this); // Key data
return AddressTools.Base58EncodeCheck(r.ToArray());
}
git://git.novaco.in / NovacoinLibrary.git / blobdiff