92 lines
2.8 KiB
C#
92 lines
2.8 KiB
C#
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//Copyright (c) Microsoft Corporation. All rights reserved.
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using System;
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using System.Security.Cryptography;
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// **************************************************************
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// * Raw implementation of the MD5 hash algorithm
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// * from RFC 1321.
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// *
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// * Written By: Reid Borsuk and Jenny Zheng
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// * Copyright (c) Microsoft Corporation. All rights reserved.
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// **************************************************************
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#if SILVERLIGHT
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#else
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//public class MD5Managed : MD5
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#endif
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namespace SharpCifs.Util.Sharpen
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{
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public class Md5Managed : HashAlgorithm
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{
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public static Md5Managed Create()
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{
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return new Md5Managed();
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}
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private byte[] _data;
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private AbcdStruct _abcd;
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private Int64 _totalLength;
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private int _dataSize;
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public Md5Managed()
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{
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//field cannot access
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//HashSizeValue = 0x80;
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Initialize();
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}
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public override void Initialize()
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{
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_data = new byte[64];
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_dataSize = 0;
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_totalLength = 0;
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_abcd = new AbcdStruct();
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//Intitial values as defined in RFC 1321
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_abcd.A = 0x67452301;
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_abcd.B = 0xefcdab89;
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_abcd.C = 0x98badcfe;
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_abcd.D = 0x10325476;
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}
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protected override void HashCore(byte[] array, int ibStart, int cbSize)
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{
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int startIndex = ibStart;
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int totalArrayLength = _dataSize + cbSize;
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if (totalArrayLength >= 64)
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{
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Array.Copy(array, startIndex, _data, _dataSize, 64 - _dataSize);
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// Process message of 64 bytes (512 bits)
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Md5Core.GetHashBlock(_data, ref _abcd, 0);
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startIndex += 64 - _dataSize;
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totalArrayLength -= 64;
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while (totalArrayLength >= 64)
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{
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Array.Copy(array, startIndex, _data, 0, 64);
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Md5Core.GetHashBlock(array, ref _abcd, startIndex);
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totalArrayLength -= 64;
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startIndex += 64;
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}
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_dataSize = totalArrayLength;
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Array.Copy(array, startIndex, _data, 0, totalArrayLength);
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}
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else
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{
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Array.Copy(array, startIndex, _data, _dataSize, cbSize);
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_dataSize = totalArrayLength;
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}
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_totalLength += cbSize;
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}
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protected override byte[] HashFinal()
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{
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//field cannot access
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//HashValue = Md5Core.GetHashFinalBlock(_data, 0, _dataSize, _abcd, _totalLength * 8);
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//return HashValue;
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return Md5Core.GetHashFinalBlock(_data, 0, _dataSize, _abcd, _totalLength * 8);
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}
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}
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}
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