Comments

[NovacoinLibrary.git] / Novacoin / Hash.cs

diff --git a/Novacoin/Hash.cs b/Novacoin/Hash.cs
index 14c19d9..990ec7b 100644 (file)
--- a/Novacoin/Hash.cs
+++ b/Novacoin/Hash.cs
@@ -1,4 +1,23 @@
-\feffusing System.Security.Cryptography;
+\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 System;
+using System.Security.Cryptography;
 using System.Collections.Generic;
 using System.Linq;
 
@@ -38,17 +57,32 @@ namespace Novacoin
         }
 
         /// <summary>
-        /// Initializes a new instance of Hash class with first 20 bytes from supplied list
+        /// Initializes a new instance of Hash class
         /// </summary>
         /// <param name="bytesList">List of bytes</param>
-        public Hash(IEnumerable<byte> bytes)
+        public Hash(IEnumerable<byte> bytes, int skip = 0)
         {
-            _hashBytes = bytes.Take<byte>(hashSize).ToArray<byte>();
+            _hashBytes = bytes.Skip(skip).Take(hashSize).ToArray();
         }
 
-        public Hash(byte[] bytes)
+        /// <summary>
+        /// Initializes a new instance of Hash class
+        /// </summary>
+        /// <param name="bytesList">Array of bytes</param>
+        public Hash(byte[] bytes, int offset = 0)
+        {
+            _hashBytes = new byte[hashSize];
+            Array.Copy(bytes, offset, _hashBytes, 0, hashSize);
+        }
+
+        /// <summary>
+        /// Initializes a new instance of Hash class as a copy of another one
+        /// </summary>
+        /// <param name="bytesList">Instance of hash class</param>
+        public Hash(Hash h)
         {
-            _hashBytes = bytes;
+            _hashBytes = new byte[h.hashSize];
+            h._hashBytes.CopyTo(_hashBytes, 0);
         }
 
         public bool IsZero