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

itnessTrackerPlusEntities entites = new FitnessTrackerPlusEntities(new Uri("http://192.168.1.104/FitnessTrackerPlusDataService.svc"));
 string name;
        string pwd;
        private void LoginBtn_Click(object sender, RoutedEventArgs e)
        {
            name = NameTextBox.Text;
            pwd = PwdTextBox.Password.ToString();

            var query = (from u in entites.users where u.username == name select u) as DataServiceQuery<users>;
            query.BeginExecute(users_CallBack, query);
            
        }

        private void users_CallBack(IAsyncResult result)
        {
            var query = result.AsyncState as DataServiceQuery<users>;

            var user = query.EndExecute(result).ToArray();
            if (user.Length > 0)
            {
                //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
                string md5Pwd = MD5.GetMd5String(pwd).ToUpper();
                if (user[0].password == md5Pwd)
                {
                    //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
                    IsolatedStorageSettings.ApplicationSettings["user"] = new User() { Name = name, Id = user[0].id, Pwd = pwd };
                    
                    //异步 跳转页面
                    this.Dispatcher.BeginInvoke(() => { NavigationService.Navigate(new Uri("/Homepage.xaml", UriKind.Relative)); });
                    
                }

            }
            else
            {
                this.Dispatcher.BeginInvoke(() => { MessageBox.Show("Error"); });

            }

        }

1.2将用户信息存储在独立存储中

1.2.1用户类

public class User
    {
        private string _name;

        public string Name
        {
            get { return _name; }
            set { _name = value; }
        }
        private int _id;

        public int Id
        {
            get { return _id; }
            set { _id = value; }
        }
        private string _pwd;

        public string Pwd
        {
            get { return _pwd; }
            set { _pwd = value; }
        }

    }

1.2.2存储

 //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
                    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 

        private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
        {

            if (IsolatedStorageSettings.ApplicationSettings.Contains("user"))
            {
               var use= IsolatedStorageSettings.ApplicationSettings["user"] as User;
               NameTextBox.Text = use.Name.ToString();
               PwdTextBox.Password = use.Pwd.ToString();
            }         
        }

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);         }     }