Remove RIPEMD160, SHA1 and SHA256 classes.

[NovacoinLibrary.git] / Novacoin / Hash256.cs

diff --git a/Novacoin/Hash256.cs b/Novacoin/Hash256.cs
index 365f778..3d3a360 100644 (file)
--- a/Novacoin/Hash256.cs
+++ b/Novacoin/Hash256.cs
@@ -1,36 +1,97 @@
-\feffusing System;
-using System.Text;
-using System.Linq;
+\feff/**
+ *  Novacoin classes library
+ *  Copyright (C) 2015 Alex D. (balthazar.ad@gmail.com)
+
+ *  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.Digests;
 
 namespace Novacoin
 {
-       /// <summary>
-       /// Representation of SHA-256 hash
-       /// </summary>
-       public class Hash256
-       {
-               /// <summary>
-               /// Array of digest bytes.
-               /// </summary>
-               private byte[] h;
-
-               /// <summary>
-               /// Initializes an empty instance of the Hash256 class.
-               /// </summary>
-               public Hash256 ()
-               {
-                       h = Enumerable.Repeat<byte>(0, 32).ToArray();
-               }
-
-               public override string ToString()
-               {
-                       StringBuilder sb = new StringBuilder(h.Length * 2);
-                       foreach (byte b in h)
-                       {
-                               sb.AppendFormat ("{0:x2}", b);
-                       }
-                       return sb.ToString();
-               }
-       }
-}
+    /// <summary>
+    /// Representation of Double SHA-256 hash
+    /// </summary>
+    public class Hash256 : Hash
+    {
+        private static Sha256Digest _hasher256 = new Sha256Digest();
+
+        // 32 bytes
+        public override int hashSize
+        {
+            get { return _hasher256.GetDigestSize(); }
+        }
+
+        public Hash256() : base() { }
+        public Hash256(byte[] bytes, int offset=0) : base(bytes, offset) { }
+        public Hash256(Hash256 h) : base(h) { }
+
+        public static Hash256 Compute256(byte[] dataBytes)
+        {
+            var digest1 = new byte[32];
+            var digest2 = new byte[32];
+
+            _hasher256.BlockUpdate(dataBytes, 0, dataBytes.Length);            
+            _hasher256.DoFinal(digest1, 0);
+            _hasher256.BlockUpdate(digest1, 0, digest1.Length);            
+            _hasher256.DoFinal(digest2, 0);
+
+            return new Hash256(digest2);
+        }
 
+        public static Hash256 Compute256(ref byte[] input1, ref byte[] input2)
+        {
+            var digest1 = new byte[_hasher256.GetDigestSize()];
+            var digest2 = new byte[_hasher256.GetDigestSize()];
+
+            _hasher256.BlockUpdate(input1, 0, input1.Length);
+            _hasher256.BlockUpdate(input2, 0, input2.Length);
+            _hasher256.DoFinal(digest1, 0);
+
+            _hasher256.BlockUpdate(digest1, 0, digest1.Length);
+            _hasher256.DoFinal(digest2, 0);
+
+            return new Hash256(digest2);
+        }
+
+        public static byte[] ComputeRaw256(byte[] dataBytes)
+        {
+            var digest1 = new byte[32];
+            var digest2 = new byte[32];
+
+            _hasher256.BlockUpdate(dataBytes, 0, dataBytes.Length);
+            _hasher256.DoFinal(digest1, 0);
+            _hasher256.BlockUpdate(digest1, 0, digest1.Length);
+            _hasher256.DoFinal(digest2, 0);
+
+            return digest2;
+        }
+
+        public static byte[] ComputeRaw256(ref byte[] input1, ref byte[] input2)
+        {
+            var digest1 = new byte[_hasher256.GetDigestSize()];
+            var digest2 = new byte[_hasher256.GetDigestSize()];
+
+            _hasher256.BlockUpdate(input1, 0, input1.Length);
+            _hasher256.BlockUpdate(input2, 0, input2.Length);
+            _hasher256.DoFinal(digest1, 0);
+
+            _hasher256.BlockUpdate(digest1, 0, digest1.Length);
+            _hasher256.DoFinal(digest2, 0);
+
+            return digest2;
+        }
+    }
+}