示例#1
0
        public static string GetNep2FromPrivateKey(byte[] prikey, string passphrase)
        {
            var pubkey      = Helper.GetPublicKeyFromPrivateKey(prikey);
            var script_hash = Helper.GetScriptHashFromPublicKey(pubkey);

            string address = Helper.GetAddressFromScriptHash(script_hash);

            var b1 = Sha256(Encoding.ASCII.GetBytes(address));
            var b2 = Sha256(b1);

            byte[] addresshash  = b2.Take(4).ToArray();
            byte[] derivedkey   = SCrypt.DeriveKey(Encoding.UTF8.GetBytes(passphrase), addresshash, 16384, 8, 8, 64);
            byte[] derivedhalf1 = derivedkey.Take(32).ToArray();
            byte[] derivedhalf2 = derivedkey.Skip(32).ToArray();
            var    xorinfo      = XOR(prikey, derivedhalf1);

            byte[] encryptedkey = AES256Encrypt(xorinfo, derivedhalf2);
            byte[] buffer       = new byte[39];
            buffer[0] = 0x01;
            buffer[1] = 0x42;
            buffer[2] = 0xe0;
            Buffer.BlockCopy(addresshash, 0, buffer, 3, addresshash.Length);
            Buffer.BlockCopy(encryptedkey, 0, buffer, 7, encryptedkey.Length);
            return(Base58CheckEncode(buffer));
        }
示例#2
0
 public static byte[] GetPrivateKeyFromNEP2(string nep2, string passphrase)
 {
     if (nep2 == null)
     {
         throw new ArgumentNullException(nameof(nep2));
     }
     if (passphrase == null)
     {
         throw new ArgumentNullException(nameof(passphrase));
     }
     byte[] data = Base58CheckDecode(nep2);
     if (data.Length != 39 || data[0] != 0x01 || data[1] != 0x42 || data[2] != 0xe0)
     {
         throw new FormatException();
     }
     byte[] addresshash = new byte[4];
     Buffer.BlockCopy(data, 3, addresshash, 0, 4);
     byte[] derivedkey   = SCrypt.DeriveKey(Encoding.UTF8.GetBytes(passphrase), addresshash, 16384, 8, 8, 64);
     byte[] derivedhalf1 = derivedkey.Take(32).ToArray();
     byte[] derivedhalf2 = derivedkey.Skip(32).ToArray();
     byte[] encryptedkey = new byte[32];
     Buffer.BlockCopy(data, 7, encryptedkey, 0, 32);
     byte[] prikey = XOR(AES256Decrypt(encryptedkey, derivedhalf2), derivedhalf1);
     //Cryptography.ECC.ECPoint pubkey = Cryptography.ECC.ECCurve.Secp256r1.G * prikey;
     //UInt160 script_hash = Contract.CreateSignatureRedeemScript(pubkey).ToScriptHash();
     //string address = ToAddress(script_hash);
     //if (!Encoding.ASCII.GetBytes(address).Sha256().Sha256().Take(4).SequenceEqual(addresshash))
     //    throw new FormatException();
     return(prikey);
 }