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