WP7不支持MD5加密，在網上找了一個實現MD5加密的算法。

//Copyright (c) Microsoft Corporation. All rights reserved. using System; using System.Text; // ************************************************************** //可惜Wp和Sl都不支持MD5了，網上找的 // * Raw implementation of the MD5 hash algorithm // * from RFC 1321. // * // * Written By: Reid Borsuk and Jenny Zheng // * Copyright (c) Microsoft Corporation. All rights reserved. // ************************************************************** // Simple struct for the (a,b,c,d) which is used to compute the mesage digest. struct ABCDStruct {public uint A;public uint B;public uint C;public uint D; } public sealed class MD5Core {//Prevent CSC from adding a default public constructorprivate MD5Core() { }public static byte[] GetHash(string input, Encoding encoding){if (null == input)throw new System.ArgumentNullException("input", "Unable to calculate hash over null input data");if (null == encoding)throw new System.ArgumentNullException("encoding", "Unable to calculate hash over a string without a default encoding. Consider using the GetHash(string) overload to use UTF8 Encoding");byte[] target = encoding.GetBytes(input);return GetHash(target);}public static byte[] GetHash(string input){return GetHash(input, new UTF8Encoding());}public static string GetHashString(byte[] input){if (null == input)throw new System.ArgumentNullException("input", "Unable to calculate hash over null input data");string retval = BitConverter.ToString(GetHash(input));retval = retval.Replace("-", "");return retval;}public static string GetHashString(string input, Encoding encoding){if (null == input)throw new System.ArgumentNullException("input", "Unable to calculate hash over null input data");if (null == encoding)throw new System.ArgumentNullException("encoding", "Unable to calculate hash over a string without a default encoding. Consider using the GetHashString(string) overload to use UTF8 Encoding");byte[] target = encoding.GetBytes(input);return GetHashString(target);}public static string GetHashString(string input){return GetHashString(input, new UTF8Encoding());}public static byte[] GetHash(byte[] input){if (null == input)throw new System.ArgumentNullException("input", "Unable to calculate hash over null input data");//Intitial values defined in RFC 1321ABCDStruct abcd = new ABCDStruct();abcd.A = 0x67452301;abcd.B = 0xefcdab89;abcd.C = 0x98badcfe;abcd.D = 0x10325476;//We pass in the input array by block, the final block of data must be handled specialy for padding & length embedingint startIndex = 0;while (startIndex <= input.Length - 64){MD5Core.GetHashBlock(input, ref abcd, startIndex);startIndex += 64;}// The final data block. return MD5Core.GetHashFinalBlock(input, startIndex, input.Length - startIndex, abcd, (Int64)input.Length * 8);}internal static byte[] GetHashFinalBlock(byte[] input, int ibStart, int cbSize, ABCDStruct ABCD, Int64 len){byte[] working = new byte[64];byte[] length = BitConverter.GetBytes(len);//Padding is a single bit 1, followed by the number of 0s required to make size congruent to 448 modulo 512. Step 1 of RFC 1321 //The CLR ensures that our buffer is 0-assigned, we don't need to explicitly set it. This is why it ends up being quicker to just//use a temporary array rather then doing in-place assignment (5% for small inputs)Array.Copy(input, ibStart, working, 0, cbSize);working[cbSize] = 0x80;//We have enough room to store the length in this chunkif (cbSize <= 56){Array.Copy(length, 0, working, 56, 8);GetHashBlock(working, ref ABCD, 0);}else //We need an aditional chunk to store the length {GetHashBlock(working, ref ABCD, 0);//Create an entirely new chunk due to the 0-assigned trick mentioned above, to avoid an extra function call clearing the arrayworking = new byte[64];Array.Copy(length, 0, working, 56, 8);GetHashBlock(working, ref ABCD, 0);}byte[] output = new byte[16];Array.Copy(BitConverter.GetBytes(ABCD.A), 0, output, 0, 4);Array.Copy(BitConverter.GetBytes(ABCD.B), 0, output, 4, 4);Array.Copy(BitConverter.GetBytes(ABCD.C), 0, output, 8, 4);Array.Copy(BitConverter.GetBytes(ABCD.D), 0, output, 12, 4);return output;}// Performs a single block transform of MD5 for a given set of ABCD inputs/* If implementing your own hashing framework, be sure to set the initial ABCD correctly according to RFC 1321:// A = 0x67452301;// B = 0xefcdab89;// C = 0x98badcfe;// D = 0x10325476;*/internal static void GetHashBlock(byte[] input, ref ABCDStruct ABCDValue, int ibStart){uint[] temp = Converter(input, ibStart);uint a = ABCDValue.A;uint b = ABCDValue.B;uint c = ABCDValue.C;uint d = ABCDValue.D;a = r1(a, b, c, d, temp[0], 7, 0xd76aa478);d = r1(d, a, b, c, temp[1], 12, 0xe8c7b756);c = r1(c, d, a, b, temp[2], 17, 0x242070db);b = r1(b, c, d, a, temp[3], 22, 0xc1bdceee);a = r1(a, b, c, d, temp[4], 7, 0xf57c0faf);d = r1(d, a, b, c, temp[5], 12, 0x4787c62a);c = r1(c, d, a, b, temp[6], 17, 0xa8304613);b = r1(b, c, d, a, temp[7], 22, 0xfd469501);a = r1(a, b, c, d, temp[8], 7, 0x698098d8);d = r1(d, a, b, c, temp[9], 12, 0x8b44f7af);c = r1(c, d, a, b, temp[10], 17, 0xffff5bb1);b = r1(b, c, d, a, temp[11], 22, 0x895cd7be);a = r1(a, b, c, d, temp[12], 7, 0x6b901122);d = r1(d, a, b, c, temp[13], 12, 0xfd987193);c = r1(c, d, a, b, temp[14], 17, 0xa679438e);b = r1(b, c, d, a, temp[15], 22, 0x49b40821);a = r2(a, b, c, d, temp[1], 5, 0xf61e2562);d = r2(d, a, b, c, temp[6], 9, 0xc040b340);c = r2(c, d, a, b, temp[11], 14, 0x265e5a51);b = r2(b, c, d, a, temp[0], 20, 0xe9b6c7aa);a = r2(a, b, c, d, temp[5], 5, 0xd62f105d);d = r2(d, a, b, c, temp[10], 9, 0x02441453);c = r2(c, d, a, b, temp[15], 14, 0xd8a1e681);b = r2(b, c, d, a, temp[4], 20, 0xe7d3fbc8);a = r2(a, b, c, d, temp[9], 5, 0x21e1cde6);d = r2(d, a, b, c, temp[14], 9, 0xc33707d6);c = r2(c, d, a, b, temp[3], 14, 0xf4d50d87);b = r2(b, c, d, a, temp[8], 20, 0x455a14ed);a = r2(a, b, c, d, temp[13], 5, 0xa9e3e905);d = r2(d, a, b, c, temp[2], 9, 0xfcefa3f8);c = r2(c, d, a, b, temp[7], 14, 0x676f02d9);b = r2(b, c, d, a, temp[12], 20, 0x8d2a4c8a);a = r3(a, b, c, d, temp[5], 4, 0xfffa3942);d = r3(d, a, b, c, temp[8], 11, 0x8771f681);c = r3(c, d, a, b, temp[11], 16, 0x6d9d6122);b = r3(b, c, d, a, temp[14], 23, 0xfde5380c);a = r3(a, b, c, d, temp[1], 4, 0xa4beea44);d = r3(d, a, b, c, temp[4], 11, 0x4bdecfa9);c = r3(c, d, a, b, temp[7], 16, 0xf6bb4b60);b = r3(b, c, d, a, temp[10], 23, 0xbebfbc70);a = r3(a, b, c, d, temp[13], 4, 0x289b7ec6);d = r3(d, a, b, c, temp[0], 11, 0xeaa127fa);c = r3(c, d, a, b, temp[3], 16, 0xd4ef3085);b = r3(b, c, d, a, temp[6], 23, 0x04881d05);a = r3(a, b, c, d, temp[9], 4, 0xd9d4d039);d = r3(d, a, b, c, temp[12], 11, 0xe6db99e5);c = r3(c, d, a, b, temp[15], 16, 0x1fa27cf8);b = r3(b, c, d, a, temp[2], 23, 0xc4ac5665);a = r4(a, b, c, d, temp[0], 6, 0xf4292244);d = r4(d, a, b, c, temp[7], 10, 0x432aff97);c = r4(c, d, a, b, temp[14], 15, 0xab9423a7);b = r4(b, c, d, a, temp[5], 21, 0xfc93a039);a = r4(a, b, c, d, temp[12], 6, 0x655b59c3);d = r4(d, a, b, c, temp[3], 10, 0x8f0ccc92);c = r4(c, d, a, b, temp[10], 15, 0xffeff47d);b = r4(b, c, d, a, temp[1], 21, 0x85845dd1);a = r4(a, b, c, d, temp[8], 6, 0x6fa87e4f);d = r4(d, a, b, c, temp[15], 10, 0xfe2ce6e0);c = r4(c, d, a, b, temp[6], 15, 0xa3014314);b = r4(b, c, d, a, temp[13], 21, 0x4e0811a1);a = r4(a, b, c, d, temp[4], 6, 0xf7537e82);d = r4(d, a, b, c, temp[11], 10, 0xbd3af235);c = r4(c, d, a, b, temp[2], 15, 0x2ad7d2bb);b = r4(b, c, d, a, temp[9], 21, 0xeb86d391);ABCDValue.A = unchecked(a + ABCDValue.A);ABCDValue.B = unchecked(b + ABCDValue.B);ABCDValue.C = unchecked(c + ABCDValue.C);ABCDValue.D = unchecked(d + ABCDValue.D);return;}//Manually unrolling these equations nets us a 20% performance improvementprivate static uint r1(uint a, uint b, uint c, uint d, uint x, int s, uint t){// (b + LSR((a + F(b, c, d) + x + t), s))//F(x, y, z) ((x & y) | ((x ^ 0xFFFFFFFF) & z))return unchecked(b + LSR((a + ((b & c) | ((b ^ 0xFFFFFFFF) & d)) + x + t), s));}private static uint r2(uint a, uint b, uint c, uint d, uint x, int s, uint t){// (b + LSR((a + G(b, c, d) + x + t), s))//G(x, y, z) ((x & z) | (y & (z ^ 0xFFFFFFFF)))return unchecked(b + LSR((a + ((b & d) | (c & (d ^ 0xFFFFFFFF))) + x + t), s));}private static uint r3(uint a, uint b, uint c, uint d, uint x, int s, uint t){// (b + LSR((a + H(b, c, d) + k + i), s))//H(x, y, z) (x ^ y ^ z)return unchecked(b + LSR((a + (b ^ c ^ d) + x + t), s));}private static uint r4(uint a, uint b, uint c, uint d, uint x, int s, uint t){// (b + LSR((a + I(b, c, d) + k + i), s))//I(x, y, z) (y ^ (x | (z ^ 0xFFFFFFFF)))return unchecked(b + LSR((a + (c ^ (b | (d ^ 0xFFFFFFFF))) + x + t), s));}// Implementation of left rotate// s is an int instead of a uint becuase the CLR requires the argument passed to >>/<< is of // type int. Doing the demoting inside this function would add overhead.private static uint LSR(uint i, int s){return ((i << s) | (i >> (32 - s)));}//Convert input array into array of UIntsprivate static uint[] Converter(byte[] input, int ibStart){if (null == input)throw new System.ArgumentNullException("input", "Unable convert null array to array of uInts");uint[] result = new uint[16];for (int i = 0; i < 16; i++){result[i] = (uint)input[ibStart + i * 4];result[i] += (uint)input[ibStart + i * 4 + 1] << 8;result[i] += (uint)input[ibStart + i * 4 + 2] << 16;result[i] += (uint)input[ibStart + i * 4 + 3] << 24;}return result;} }

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轉載于:https://www.cnblogs.com/leestar54/p/3335978.html

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