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Windows phone 7是否支持HMAC_MD5哈希算法? RRS feed

答案

  • 如果放到Windows phone 中应用 则发现Silverlight中本身就对MD5加密不支持. 其中MD5CryptoServiceProvider是不支持的,我们可以采用第三方的方式实现Silverlight对MD5支持:

    //Copyright (c) Microsoft Corporation. All rights reserved.
    using System;
    using System.Text;
    
    // **************************************************************
    // * 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 constructor
      private 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 1321
        ABCDStruct 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 embeding
        int 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 chunk
        if (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 array
          working = 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 improvement
      private 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 UInts
      private 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;
      }
    }
    
    <br/>
    
    <br/>
    

    获取MD5机密支持后. 发现原来具有的ACII格式Encoding Windows phone 也不支持. 统一替换成功UTF-8编码格式.

    System。Text.UTF8Encoding。


    idea is not born!
    2011年8月1日 3:26
  • 经过几个小时验证和努力.终于移植并验证 Windows phone 7 HMAC_MD5标准的哈希算法. 编写一个标准操作类如下.:

      /// <summary>
      /// HMAC_MD5标准算法实现[Widnows phone 7]
      /// Author:chenkai daTe:2011年8月1日11:06:14
      /// </summary>
      public class HMACMD5
      {
        /// <summary> 
        /// HMAC_MD5加密 
        /// </summary> 
        /// <param name="original">明文</param> 
        /// <param name="key">密钥</param> 
        /// <returns>返回加密的字符串</returns> 
        public static string HMAC_MD5(string original, string key)
        {
          byte[] b_tmp;
          byte[] b_tmp1;
          if (key == null)
          {
            return null;
          }
          byte[] digest = new byte[512];
          byte[] k_ipad = new byte[64];
          byte[] k_opad = new byte[64];
    
          byte[] source = System.Text.UTF8Encoding.UTF8.GetBytes(key);
          //System.Security.Cryptography.MD5 shainner = new MD5CryptoServiceProvider();
    
          for (int i = 0; i < 64; i++)
          {
            k_ipad[i] = 0 ^ 0x36;
            k_opad[i] = 0 ^ 0x5c;
          }
    
          try
          {
            if (source.Length > 64)
            {
              //shainner = new MD5CryptoServiceProvider();
              source = MD5Core.GetHash(source);//shainner.ComputeHash(source);
            }
    
            for (int i = 0; i < source.Length; i++)
            {
              k_ipad[i] = (byte)(source[i] ^ 0x36);
              k_opad[i] = (byte)(source[i] ^ 0x5c);
            }
    
            b_tmp1 = System.Text.UTF8Encoding.UTF8.GetBytes(original);//内容
            b_tmp = Adding(k_ipad, b_tmp1);
    
    
            //shainner = new MD5CryptoServiceProvider();
            digest = MD5Core.GetHash(b_tmp); //shainner.ComputeHash(b_tmp);
            b_tmp = Adding(k_opad, digest);
    
    
            //shainner = new MD5CryptoServiceProvider();
            digest = MD5Core.GetHash(b_tmp); //shainner.ComputeHash(b_tmp);
            return ByteToString(digest);
          }
          catch (Exception e)
          {
            throw e;
          }
        }
    
        /// <summary> 
        /// 填充byte 
        /// </summary> 
        /// <param name="a"></param> 
        /// <param name="b"></param> 
        /// <returns></returns> 
        private static byte[] Adding(byte[] a, byte[] b)
        {
          byte[] c = new byte[a.Length + b.Length];
          a.CopyTo(c, 0);
          b.CopyTo(c, a.Length);
          return c;
        }
    
        /// <summary> 
        /// Byte To String 
        /// </summary> 
        /// <param name="buff"></param> 
        /// <returns></returns> 
        private static string ByteToString(byte[] buff)
        {
          string sbinary = "";
    
          for (int i = 0; i < buff.Length; i++)
          {
            sbinary += buff[i].ToString("X2"); // hex format 
          }
          return (sbinary);
        } 
      }
    
    

    其中MD5Cdoe类即是楼上回复的MD5 加密算法Silverlight实现类. 其中需要注意的地方是.首先是字符串转二进制码. 因Wp7对ASCII不支持. 。所以采用替代方法来做. 另外关于MD5加密统一采用的是UTF-8编码格式.来进行数据封装, 

    测试该算放的方式.可以找一个在线的HMAC_MD5算法计算同样的数值进行比对. 经过测试验证 如上已通过.如果其他需求请在该贴的基础上进行修改扩展即可.


    idea is not born!
    2011年8月4日 2:49
  • Ok!Fine 我来结贴吧.

    关于 HMAC_MD5 哈希算法在Windows phone 7是并不支持的. 目前在Silverlight平台中仅仅支持的匹配哈希算法是 System.Security.Cryptography.HMACSHA1 System.Security.Cryptography.HMACSHA256,

     

    chenkai


    idea is not born!
    2011年7月28日 8:00
  • 关于HMAC_MD5是一个标准实现 . 采用C# 代码实现如下:

    //算法核心模块
    public byte[] hmac_md5(string timespan, string password)
     {
      byte[] b_tmp;
      byte[] b_tmp1;
      if (password == null)
      {
      return null;
      }
      byte[] digest = new byte[512];
      byte[] k_ipad = new byte[64];
      byte[] k_opad = new byte[64];
      byte[] source = System.Text.ASCIIEncoding.ASCII.GetBytes(password);
      System.Security.Cryptography.MD5 shainner = new MD5CryptoServiceProvider();
      for (int i = 0; i < 64; i++)
      {
      k_ipad[i] = 0 ^ 0x36;
      k_opad[i] = 0 ^ 0x5c;
      }
    
      try 
      {
      if (source.Length > 64)
      {
       shainner = new MD5CryptoServiceProvider();
       source = shainner.ComputeHash(source);
      }
      for (int i = 0; i < source.Length; i++)
      {
       k_ipad[i] = (byte) (source[i] ^ 0x36);
       k_opad[i] = (byte) (source[i] ^ 0x5c);
      }
      b_tmp1 = System.Text.ASCIIEncoding.ASCII.GetBytes(timespan);
      b_tmp = adding(k_ipad,b_tmp1);
      shainner = new MD5CryptoServiceProvider();
      digest = shainner.ComputeHash(b_tmp);
      b_tmp = adding(k_opad,digest);
      shainner = new MD5CryptoServiceProvider();
      digest = shainner.ComputeHash(b_tmp);
      return digest;
      } 
      catch (Exception e) 
      {
      throw e;
      }
     }
    
    
    //填充Byte[]
    public byte[] adding(byte[] a,byte[] b)
     {
      byte[] c = new byte[a.Length+b.Length];
      a.CopyTo(c,0);
      b.CopyTo(c,a.Length);
      return c;
     }
    



    idea is not born!
    2011年8月1日 3:03

全部回复

  • 无人验证 ?求解.!
    idea is not born!
    2011年7月28日 7:24
  • Ok!Fine 我来结贴吧.

    关于 HMAC_MD5 哈希算法在Windows phone 7是并不支持的. 目前在Silverlight平台中仅仅支持的匹配哈希算法是 System.Security.Cryptography.HMACSHA1 System.Security.Cryptography.HMACSHA256,

     

    chenkai


    idea is not born!
    2011年7月28日 8:00
  • 关于HMAC_MD5是一个标准实现 . 采用C# 代码实现如下:

    //算法核心模块
    public byte[] hmac_md5(string timespan, string password)
     {
      byte[] b_tmp;
      byte[] b_tmp1;
      if (password == null)
      {
      return null;
      }
      byte[] digest = new byte[512];
      byte[] k_ipad = new byte[64];
      byte[] k_opad = new byte[64];
      byte[] source = System.Text.ASCIIEncoding.ASCII.GetBytes(password);
      System.Security.Cryptography.MD5 shainner = new MD5CryptoServiceProvider();
      for (int i = 0; i < 64; i++)
      {
      k_ipad[i] = 0 ^ 0x36;
      k_opad[i] = 0 ^ 0x5c;
      }
    
      try 
      {
      if (source.Length > 64)
      {
       shainner = new MD5CryptoServiceProvider();
       source = shainner.ComputeHash(source);
      }
      for (int i = 0; i < source.Length; i++)
      {
       k_ipad[i] = (byte) (source[i] ^ 0x36);
       k_opad[i] = (byte) (source[i] ^ 0x5c);
      }
      b_tmp1 = System.Text.ASCIIEncoding.ASCII.GetBytes(timespan);
      b_tmp = adding(k_ipad,b_tmp1);
      shainner = new MD5CryptoServiceProvider();
      digest = shainner.ComputeHash(b_tmp);
      b_tmp = adding(k_opad,digest);
      shainner = new MD5CryptoServiceProvider();
      digest = shainner.ComputeHash(b_tmp);
      return digest;
      } 
      catch (Exception e) 
      {
      throw e;
      }
     }
    
    
    //填充Byte[]
    public byte[] adding(byte[] a,byte[] b)
     {
      byte[] c = new byte[a.Length+b.Length];
      a.CopyTo(c,0);
      b.CopyTo(c,a.Length);
      return c;
     }
    



    idea is not born!
    2011年8月1日 3:03
  • 如果放到Windows phone 中应用 则发现Silverlight中本身就对MD5加密不支持. 其中MD5CryptoServiceProvider是不支持的,我们可以采用第三方的方式实现Silverlight对MD5支持:

    //Copyright (c) Microsoft Corporation. All rights reserved.
    using System;
    using System.Text;
    
    // **************************************************************
    // * 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 constructor
      private 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 1321
        ABCDStruct 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 embeding
        int 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 chunk
        if (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 array
          working = 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 improvement
      private 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 UInts
      private 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;
      }
    }
    
    <br/>
    
    <br/>
    

    获取MD5机密支持后. 发现原来具有的ACII格式Encoding Windows phone 也不支持. 统一替换成功UTF-8编码格式.

    System。Text.UTF8Encoding。


    idea is not born!
    2011年8月1日 3:26
  • 经过几个小时验证和努力.终于移植并验证 Windows phone 7 HMAC_MD5标准的哈希算法. 编写一个标准操作类如下.:

      /// <summary>
      /// HMAC_MD5标准算法实现[Widnows phone 7]
      /// Author:chenkai daTe:2011年8月1日11:06:14
      /// </summary>
      public class HMACMD5
      {
        /// <summary> 
        /// HMAC_MD5加密 
        /// </summary> 
        /// <param name="original">明文</param> 
        /// <param name="key">密钥</param> 
        /// <returns>返回加密的字符串</returns> 
        public static string HMAC_MD5(string original, string key)
        {
          byte[] b_tmp;
          byte[] b_tmp1;
          if (key == null)
          {
            return null;
          }
          byte[] digest = new byte[512];
          byte[] k_ipad = new byte[64];
          byte[] k_opad = new byte[64];
    
          byte[] source = System.Text.UTF8Encoding.UTF8.GetBytes(key);
          //System.Security.Cryptography.MD5 shainner = new MD5CryptoServiceProvider();
    
          for (int i = 0; i < 64; i++)
          {
            k_ipad[i] = 0 ^ 0x36;
            k_opad[i] = 0 ^ 0x5c;
          }
    
          try
          {
            if (source.Length > 64)
            {
              //shainner = new MD5CryptoServiceProvider();
              source = MD5Core.GetHash(source);//shainner.ComputeHash(source);
            }
    
            for (int i = 0; i < source.Length; i++)
            {
              k_ipad[i] = (byte)(source[i] ^ 0x36);
              k_opad[i] = (byte)(source[i] ^ 0x5c);
            }
    
            b_tmp1 = System.Text.UTF8Encoding.UTF8.GetBytes(original);//内容
            b_tmp = Adding(k_ipad, b_tmp1);
    
    
            //shainner = new MD5CryptoServiceProvider();
            digest = MD5Core.GetHash(b_tmp); //shainner.ComputeHash(b_tmp);
            b_tmp = Adding(k_opad, digest);
    
    
            //shainner = new MD5CryptoServiceProvider();
            digest = MD5Core.GetHash(b_tmp); //shainner.ComputeHash(b_tmp);
            return ByteToString(digest);
          }
          catch (Exception e)
          {
            throw e;
          }
        }
    
        /// <summary> 
        /// 填充byte 
        /// </summary> 
        /// <param name="a"></param> 
        /// <param name="b"></param> 
        /// <returns></returns> 
        private static byte[] Adding(byte[] a, byte[] b)
        {
          byte[] c = new byte[a.Length + b.Length];
          a.CopyTo(c, 0);
          b.CopyTo(c, a.Length);
          return c;
        }
    
        /// <summary> 
        /// Byte To String 
        /// </summary> 
        /// <param name="buff"></param> 
        /// <returns></returns> 
        private static string ByteToString(byte[] buff)
        {
          string sbinary = "";
    
          for (int i = 0; i < buff.Length; i++)
          {
            sbinary += buff[i].ToString("X2"); // hex format 
          }
          return (sbinary);
        } 
      }
    
    

    其中MD5Cdoe类即是楼上回复的MD5 加密算法Silverlight实现类. 其中需要注意的地方是.首先是字符串转二进制码. 因Wp7对ASCII不支持. 。所以采用替代方法来做. 另外关于MD5加密统一采用的是UTF-8编码格式.来进行数据封装, 

    测试该算放的方式.可以找一个在线的HMAC_MD5算法计算同样的数值进行比对. 经过测试验证 如上已通过.如果其他需求请在该贴的基础上进行修改扩展即可.


    idea is not born!
    2011年8月4日 2:49