windows phone7 ——登陆及加密 (摘抄)

一.登录

1.1用户输入账户密码后，程序将密码MD5加密后，发送到服务端(数据库的用户密码也为MD5加密)，进行匹配

View Code

 1 itnessTrackerPlusEntities entites = new FitnessTrackerPlusEntities(new Uri("http://192.168.1.104/FitnessTrackerPlusDataService.svc"));
 2  string name;
 3         string pwd;
 4         private void LoginBtn_Click(object sender, RoutedEventArgs e)
 5         {
 6             name = NameTextBox.Text;
 7             pwd = PwdTextBox.Password.ToString();
 8 
 9             var query = (from u in entites.users where u.username == name select u) as DataServiceQuery<users>;
10             query.BeginExecute(users_CallBack, query);
11             
12         }
13 
14         private void users_CallBack(IAsyncResult result)
15         {
16             var query = result.AsyncState as DataServiceQuery<users>;
17 
18             var user = query.EndExecute(result).ToArray();
19             if (user.Length > 0)
20             {
21                 //调用自定义的MD5加密字符串方法，匹配服务器MD5加密存储的密码
22                 string md5Pwd = MD5.GetMd5String(pwd).ToUpper();
23                 if (user[0].password == md5Pwd)
24                 {
25                     //用户登录成功，则将账户信息作为对象 存储在独立储存配置中
26                     IsolatedStorageSettings.ApplicationSettings["user"] = new User() { Name = name, Id = user[0].id, Pwd = pwd };
27                     
28                     //异步 跳转页面
29                     this.Dispatcher.BeginInvoke(() => { NavigationService.Navigate(new Uri("/Homepage.xaml", UriKind.Relative)); });
30                     
31                 }
32 
33             }
34             else
35             {
36                 this.Dispatcher.BeginInvoke(() => { MessageBox.Show("Error"); });
37 
38             }
39 
40         }

1.2将用户信息存储在独立存储中

1.2.1用户类

View Code

 1 public class User
 2     {
 3         private string _name;
 4 
 5         public string Name
 6         {
 7             get { return _name; }
 8             set { _name = value; }
 9         }
10         private int _id;
11 
12         public int Id
13         {
14             get { return _id; }
15             set { _id = value; }
16         }
17         private string _pwd;
18 
19         public string Pwd
20         {
21             get { return _pwd; }
22             set { _pwd = value; }
23         }
24 
25     }

1.2.2存储

1  //用户登录成功，则将账户信息作为对象 存储在独立储存配置中
2                     IsolatedStorageSettings.ApplicationSettings["user"] = new User() { Name = name, Id = user[0].id, Pwd = pwd };

1.2.3数据持久化

页面载入时 判断是否已经保存过用户信息，有则读取信息 

View Code

 1         private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
 2         {
 3 
 4             if (IsolatedStorageSettings.ApplicationSettings.Contains("user"))
 5             {
 6                var use= IsolatedStorageSettings.ApplicationSettings["user"] as User;
 7                NameTextBox.Text = use.Name.ToString();
 8                PwdTextBox.Password = use.Pwd.ToString();
 9             }         
10         }

二.MD5加密

2.1sliverlight程序 不支持MD5加密，因此我们需要导入一个自定义的类

View Code ?

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public class MD5CryptoServiceProvider : MD5      {          public MD5CryptoServiceProvider()              : base ()          {          }      }      /// <summary>      /// Summary description for MD5.      /// </summary>      public class MD5 : IDisposable      {          static public MD5 Create( string hashName)          {              if (hashName == "MD5" )                  return new MD5();              else                  throw new NotSupportedException();          }          static public String GetMd5String(String source)          {              MD5 md = MD5CryptoServiceProvider.Create();              byte [] hash;              //Create a new instance of ASCIIEncoding to               //convert the string into an array of Unicode bytes.              UTF8Encoding enc = new UTF8Encoding();              //            ASCIIEncoding enc = new ASCIIEncoding();              //Convert the string into an array of bytes.              byte [] buffer = enc.GetBytes(source);              //Create the hash value from the array of bytes.              hash = md.ComputeHash(buffer);              StringBuilder sb = new StringBuilder();              foreach ( byte b in hash)                  sb.Append(b.ToString( "x2" ));              return sb.ToString();          }          static public MD5 Create()          {              return new MD5();          }          #region base implementation of the MD5          #region constants          private const byte S11 = 7;          private const byte S12 = 12;          private const byte S13 = 17;          private const byte S14 = 22;          private const byte S21 = 5;          private const byte S22 = 9;          private const byte S23 = 14;          private const byte S24 = 20;          private const byte S31 = 4;          private const byte S32 = 11;          private const byte S33 = 16;          private const byte S34 = 23;          private const byte S41 = 6;          private const byte S42 = 10;          private const byte S43 = 15;          private const byte S44 = 21;          static private byte [] PADDING = new byte [] {                0x80, 0, 0, 0, 0, 0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,                0, 0, 0, 0, 0, 0, 0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,                0, 0, 0, 0, 0, 0, 0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0               };          #endregion          #region F, G, H and I are basic MD5 functions.          static private uint F( uint x, uint y, uint z)          {              return (((x) & (y)) | ((~x) & (z)));          }          static private uint G( uint x, uint y, uint z)          {              return (((x) & (z)) | ((y) & (~z)));          }          static private uint H( uint x, uint y, uint z)          {              return ((x) ^ (y) ^ (z));          }          static private uint I( uint x, uint y, uint z)          {              return ((y) ^ ((x) | (~z)));          }          #endregion          #region rotates x left n bits.          /// <summary>          /// rotates x left n bits.          /// </summary>          /// <param name="x"></param>          /// <param name="n"></param>          /// <returns></returns>          static private uint ROTATE_LEFT( uint x, byte n)          {              return (((x) << (n)) | ((x) >> (32 - (n))));          }          #endregion          #region FF, GG, HH, and II transformations          /// FF, GG, HH, and II transformations           /// for rounds 1, 2, 3, and 4.          /// Rotation is separate from addition to prevent recomputation.          static private void FF( ref uint a, uint b, uint c, uint d, uint x, byte s, uint ac)          {              (a) += F((b), (c), (d)) + (x) + ( uint )(ac);              (a) = ROTATE_LEFT((a), (s));              (a) += (b);          }          static private void GG( ref uint a, uint b, uint c, uint d, uint x, byte s, uint ac)          {              (a) += G((b), (c), (d)) + (x) + ( uint )(ac);              (a) = ROTATE_LEFT((a), (s));              (a) += (b);          }          static private void HH( ref uint a, uint b, uint c, uint d, uint x, byte s, uint ac)          {              (a) += H((b), (c), (d)) + (x) + ( uint )(ac);              (a) = ROTATE_LEFT((a), (s));              (a) += (b);          }          static private void II( ref uint a, uint b, uint c, uint d, uint x, byte s, uint ac)          {              (a) += I((b), (c), (d)) + (x) + ( uint )(ac);              (a) = ROTATE_LEFT((a), (s));              (a) += (b);          }          #endregion          #region context info          /// <summary>          /// state (ABCD)          /// </summary>          uint [] state = new uint [4];          /// <summary>          /// number of bits, modulo 2^64 (lsb first)          /// </summary>          uint [] count = new uint [2];          /// <summary>          /// input buffer          /// </summary>          byte [] buffer = new byte [64];          #endregion          internal MD5()          {              Initialize();          }          /// <summary>          /// MD5 initialization. Begins an MD5 operation, writing a new context.          /// </summary>          /// <remarks>          /// The RFC named it "MD5Init"          /// </remarks>          public virtual void Initialize()          {              count[0] = count[1] = 0;              // Load magic initialization constants.              state[0] = 0x67452301;              state[1] = 0xefcdab89;              state[2] = 0x98badcfe;              state[3] = 0x10325476;          }          /// <summary>          /// MD5 block update operation. Continues an MD5 message-digest          /// operation, processing another message block, and updating the          /// context.          /// </summary>          /// <param name="input"></param>          /// <param name="offset"></param>          /// <param name="count"></param>          /// <remarks>The RFC Named it MD5Update</remarks>          protected virtual void HashCore( byte [] input, int offset, int count)          {              int i;              int index;              int partLen;              // Compute number of bytes mod 64              index = ( int )(( this .count[0] >> 3) & 0x3F);              // Update number of bits              if (( this .count[0] += ( uint )(( uint )count << 3)) < (( uint )count << 3))                  this .count[1]++;              this .count[1] += (( uint )count >> 29);              partLen = 64 - index;              // Transform as many times as possible.              if (count >= partLen)              {                  Buffer.BlockCopy(input, offset, this .buffer, index, partLen);                  Transform( this .buffer, 0);                  for (i = partLen; i + 63 < count; i += 64)                      Transform(input, offset + i);                  index = 0;              }              else                  i = 0;              // Buffer remaining input               Buffer.BlockCopy(input, offset + i, this .buffer, index, count - i);          }          /// <summary>          /// MD5 finalization. Ends an MD5 message-digest operation, writing the          /// the message digest and zeroizing the context.          /// </summary>          /// <returns>message digest</returns>          /// <remarks>The RFC named it MD5Final</remarks>          protected virtual byte [] HashFinal()          {              byte [] digest = new byte [16];              byte [] bits = new byte [8];              int index, padLen;              // Save number of bits              Encode(bits, 0, this .count, 0, 8);              // Pad out to 56 mod 64.              index = ( int )(( uint )( this .count[0] >> 3) & 0x3f);              padLen = (index < 56) ? (56 - index) : (120 - index);              HashCore(PADDING, 0, padLen);              // Append length (before padding)              HashCore(bits, 0, 8);              // Store state in digest               Encode(digest, 0, state, 0, 16);              // Zeroize sensitive information.              count[0] = count[1] = 0;              state[0] = 0;              state[1] = 0;              state[2] = 0;              state[3] = 0;              // initialize again, to be ready to use              Initialize();              return digest;          }          /// <summary>          /// MD5 basic transformation. Transforms state based on 64 bytes block.          /// </summary>          /// <param name="block"></param>          /// <param name="offset"></param>          private void Transform( byte [] block, int offset)          {              uint a = state[0], b = state[1], c = state[2], d = state[3];              uint [] x = new uint [16];              Decode(x, 0, block, offset, 64);              // Round 1              FF( ref a, b, c, d, x[0], S11, 0xd76aa478); /* 1 */              FF( ref d, a, b, c, x[1], S12, 0xe8c7b756); /* 2 */              FF( ref c, d, a, b, x[2], S13, 0x242070db); /* 3 */              FF( ref b, c, d, a, x[3], S14, 0xc1bdceee); /* 4 */              FF( ref a, b, c, d, x[4], S11, 0xf57c0faf); /* 5 */              FF( ref d, a, b, c, x[5], S12, 0x4787c62a); /* 6 */              FF( ref c, d, a, b, x[6], S13, 0xa8304613); /* 7 */              FF( ref b, c, d, a, x[7], S14, 0xfd469501); /* 8 */              FF( ref a, b, c, d, x[8], S11, 0x698098d8); /* 9 */              FF( ref d, a, b, c, x[9], S12, 0x8b44f7af); /* 10 */              FF( ref c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */              FF( ref b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */              FF( ref a, b, c, d, x[12], S11, 0x6b901122); /* 13 */              FF( ref d, a, b, c, x[13], S12, 0xfd987193); /* 14 */              FF( ref c, d, a, b, x[14], S13, 0xa679438e); /* 15 */              FF( ref b, c, d, a, x[15], S14, 0x49b40821); /* 16 */              // Round 2              GG( ref a, b, c, d, x[1], S21, 0xf61e2562); /* 17 */              GG( ref d, a, b, c, x[6], S22, 0xc040b340); /* 18 */              GG( ref c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */              GG( ref b, c, d, a, x[0], S24, 0xe9b6c7aa); /* 20 */              GG( ref a, b, c, d, x[5], S21, 0xd62f105d); /* 21 */              GG( ref d, a, b, c, x[10], S22, 0x2441453); /* 22 */              GG( ref c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */              GG( ref b, c, d, a, x[4], S24, 0xe7d3fbc8); /* 24 */              GG( ref a, b, c, d, x[9], S21, 0x21e1cde6); /* 25 */              GG( ref d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */              GG( ref c, d, a, b, x[3], S23, 0xf4d50d87); /* 27 */              GG( ref b, c, d, a, x[8], S24, 0x455a14ed); /* 28 */              GG( ref a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */              GG( ref d, a, b, c, x[2], S22, 0xfcefa3f8); /* 30 */              GG( ref c, d, a, b, x[7], S23, 0x676f02d9); /* 31 */              GG( ref b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */              // Round 3              HH( ref a, b, c, d, x[5], S31, 0xfffa3942); /* 33 */              HH( ref d, a, b, c, x[8], S32, 0x8771f681); /* 34 */              HH( ref c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */              HH( ref b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */              HH( ref a, b, c, d, x[1], S31, 0xa4beea44); /* 37 */              HH( ref d, a, b, c, x[4], S32, 0x4bdecfa9); /* 38 */              HH( ref c, d, a, b, x[7], S33, 0xf6bb4b60); /* 39 */              HH( ref b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */              HH( ref a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */              HH( ref d, a, b, c, x[0], S32, 0xeaa127fa); /* 42 */              HH( ref c, d, a, b, x[3], S33, 0xd4ef3085); /* 43 */              HH( ref b, c, d, a, x[6], S34, 0x4881d05); /* 44 */              HH( ref a, b, c, d, x[9], S31, 0xd9d4d039); /* 45 */              HH( ref d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */              HH( ref c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */              HH( ref b, c, d, a, x[2], S34, 0xc4ac5665); /* 48 */              // Round 4              II( ref a, b, c, d, x[0], S41, 0xf4292244); /* 49 */              II( ref d, a, b, c, x[7], S42, 0x432aff97); /* 50 */              II( ref c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */              II( ref b, c, d, a, x[5], S44, 0xfc93a039); /* 52 */              II( ref a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */              II( ref d, a, b, c, x[3], S42, 0x8f0ccc92); /* 54 */              II( ref c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */              II( ref b, c, d, a, x[1], S44, 0x85845dd1); /* 56 */              II( ref a, b, c, d, x[8], S41, 0x6fa87e4f); /* 57 */              II( ref d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */              II( ref c, d, a, b, x[6], S43, 0xa3014314); /* 59 */              II( ref b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */              II( ref a, b, c, d, x[4], S41, 0xf7537e82); /* 61 */              II( ref d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */              II( ref c, d, a, b, x[2], S43, 0x2ad7d2bb); /* 63 */              II( ref b, c, d, a, x[9], S44, 0xeb86d391); /* 64 */              state[0] += a;              state[1] += b;              state[2] += c;              state[3] += d;              // Zeroize sensitive information.              for ( int i = 0; i < x.Length; i++)                  x[i] = 0;          }          /// <summary>          /// Encodes input (uint) into output (byte). Assumes len is          ///  multiple of 4.          /// </summary>          /// <param name="output"></param>          /// <param name="outputOffset"></param>          /// <param name="input"></param>          /// <param name="inputOffset"></param>          /// <param name="count"></param>          private static void Encode( byte [] output, int outputOffset, uint [] input, int inputOffset, int count)          {              int i, j;              int end = outputOffset + count;              for (i = inputOffset, j = outputOffset; j < end; i++, j += 4)              {                  output[j] = ( byte )(input[i] & 0xff);                  output[j + 1] = ( byte )((input[i] >> 8) & 0xff);                  output[j + 2] = ( byte )((input[i] >> 16) & 0xff);                  output[j + 3] = ( byte )((input[i] >> 24) & 0xff);              }          }          /// <summary>          /// Decodes input (byte) into output (uint). Assumes len is          /// a multiple of 4.          /// </summary>          /// <param name="output"></param>          /// <param name="outputOffset"></param>          /// <param name="input"></param>          /// <param name="inputOffset"></param>          /// <param name="count"></param>          static private void Decode( uint [] output, int outputOffset, byte [] input, int inputOffset, int count)          {              int i, j;              int end = inputOffset + count;              for (i = outputOffset, j = inputOffset; j < end; i++, j += 4)                  output[i] = (( uint )input[j]) | ((( uint )input[j + 1]) << 8) | ((( uint )input[j + 2]) << 16) | ((( uint )input[j + 3]) << 24);          }          #endregion          #region expose the same interface as the regular MD5 object          protected byte [] HashValue;          protected int State;          public virtual bool CanReuseTransform          {              get              {                  return true ;              }          }          public virtual bool CanTransformMultipleBlocks          {              get              {                  return true ;              }          }          public virtual byte [] Hash          {              get              {                  if ( this .State != 0)                      throw new InvalidOperationException();                  return ( byte [])HashValue.Clone();              }          }          public virtual int HashSize          {              get              {                  return HashSizeValue;              }          }          protected int HashSizeValue = 128;          public virtual int InputBlockSize          {              get              {                  return 1;              }          }          public virtual int OutputBlockSize          {              get              {                  return 1;              }          }          public void Clear()          {              Dispose( true );          }          public byte [] ComputeHash( byte [] buffer)          {              return ComputeHash(buffer, 0, buffer.Length);          }          public byte [] ComputeHash( byte [] buffer, int offset, int count)          {              Initialize();              HashCore(buffer, offset, count);              HashValue = HashFinal();              return ( byte [])HashValue.Clone();          }          public byte [] ComputeHash(Stream inputStream)          {              Initialize();              int count = 0;              byte [] buffer = new byte [4096];              while (0 < (count = inputStream.Read(buffer, 0, 4096)))              {                  HashCore(buffer, 0, count);              }              HashValue = HashFinal();              return ( byte [])HashValue.Clone();          }          public int TransformBlock(              byte [] inputBuffer,              int inputOffset,              int inputCount,              byte [] outputBuffer,              int outputOffset              )          {              if (inputBuffer == null )              {                  throw new ArgumentNullException( "inputBuffer" );              }              if (inputOffset < 0)              {                  throw new ArgumentOutOfRangeException( "inputOffset" );              }              if ((inputCount < 0) || (inputCount > inputBuffer.Length))              {                  throw new ArgumentException( "inputCount" );              }              if ((inputBuffer.Length - inputCount) < inputOffset)              {                  throw new ArgumentOutOfRangeException( "inputOffset" );              }              if ( this .State == 0)              {                  Initialize();                  this .State = 1;              }              HashCore(inputBuffer, inputOffset, inputCount);              if ((inputBuffer != outputBuffer) || (inputOffset != outputOffset))              {                  Buffer.BlockCopy(inputBuffer, inputOffset, outputBuffer, outputOffset, inputCount);              }              return inputCount;          }          public byte [] TransformFinalBlock(              byte [] inputBuffer,              int inputOffset,              int inputCount              )          {              if (inputBuffer == null )              {                  throw new ArgumentNullException( "inputBuffer" );              }              if (inputOffset < 0)              {                  throw new ArgumentOutOfRangeException( "inputOffset" );              }              if ((inputCount < 0) || (inputCount > inputBuffer.Length))              {                  throw new ArgumentException( "inputCount" );              }              if ((inputBuffer.Length - inputCount) < inputOffset)              {                  throw new ArgumentOutOfRangeException( "inputOffset" );              }              if ( this .State == 0)              {                  Initialize();              }              HashCore(inputBuffer, inputOffset, inputCount);              HashValue = HashFinal();              byte [] buffer = new byte [inputCount];              Buffer.BlockCopy(inputBuffer, inputOffset, buffer, 0, inputCount);              this .State = 0;              return buffer;          }          #endregion          protected virtual void Dispose( bool disposing)          {              if (!disposing)                  Initialize();          }          public void Dispose()          {              Dispose( true );          }      }

转载于:https://www.cnblogs.com/shizhenglg/archive/2012/08/14/2638352.html