public bool TryDecrypt(string encryptedItem, string password, out string decryptedItem)
    {
        if (string.IsNullOrEmpty (encryptedItem) ||
            string.IsNullOrEmpty (password)) {
            decryptedItem = "";
            return false;
        }

        try {
            byte[] cipherBytes = Convert.FromBase64String (encryptedItem);

            using (var memoryStream = new MemoryStream(cipherBytes)) {
                var des = new DESCryptoServiceProvider ();

                byte[] iv = new byte[8];
                memoryStream.Read (iv, 0, iv.Length);

                var rfc2898DeriveBytes = new Rfc2898DeriveBytes (password, iv, ITERATIONS);

                byte[] key = rfc2898DeriveBytes.GetBytes (8);

                using (var cryptoStream = new CryptoStream(memoryStream, des.CreateDecryptor(key, iv), CryptoStreamMode.Read))
                using (var streamReader = new StreamReader(cryptoStream)) {
                    decryptedItem = streamReader.ReadToEnd ();
                    return true;
                }
            }
        } catch (Exception ex) {
            Logger.instance.Log (new Logger.Message (this, ex));

            decryptedItem = "";
            return false;
        }
    }
Exemplo n.º 2
0
Arquivo: test.cs Projeto: mono/gert
	static int Main ()
	{
		string filename = Path.Combine (AppDomain.CurrentDomain.BaseDirectory,
			"encrypt.tmp");
		string data = "this is sensitive data";

		DESCryptoServiceProvider des = new DESCryptoServiceProvider ();
		des.GenerateIV ();
		des.GenerateKey ();

		// -----------  WRITING ENCRYPTED SERIALIZED DATA ------------------
		Stream stream = new FileStream (filename, FileMode.Create, FileAccess.Write);
		stream = new CryptoStream (stream, des.CreateEncryptor (), CryptoStreamMode.Write);
		BinaryFormatter bformatter = new BinaryFormatter ();
		bformatter.Serialize (stream, data);
		stream.Close ();

		stream = null;
		bformatter = null;
		data = string.Empty;

		// -----------  READING ENCRYPTED SERIALIZED DATA ------------------
		stream = new FileStream (filename, FileMode.Open, FileAccess.Read);
		stream = new CryptoStream (stream, des.CreateDecryptor (), CryptoStreamMode.Read);
		bformatter = new BinaryFormatter ();
		data = (string) bformatter.Deserialize (stream);
		stream.Close ();

		//----------- CHECK RESULTS ----------------
		if (data != "this is sensitive data")
			return 1;

		return 0;
	}
Exemplo n.º 3
0
    public static string Decrypt(string originalString, string sKey)
    {
        DESCryptoServiceProvider des = new DESCryptoServiceProvider();

        byte[] inputByteArray = new byte[originalString.Length / 2];
        for (int x = 0; x < originalString.Length / 2; x++)
        {
            int i = (Convert.ToInt32(originalString.Substring(x * 2, 2), 16));
            inputByteArray[x] = (byte)i;
        }

        //建立加密对象的密钥和偏移量,此值重要,不能修改

        des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);

        des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
        MemoryStream ms = new MemoryStream();
        CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);

        cs.Write(inputByteArray, 0, inputByteArray.Length);
        cs.FlushFinalBlock();

        //建立StringBuild对象,CreateDecrypt使用的是流对象,必须把解密后的文本变成流对象
        StringBuilder ret = new StringBuilder();

        return System.Text.Encoding.Default.GetString(ms.ToArray());
    }
Exemplo n.º 4
0
	private static void DecryptData(String inName, String outName, byte[] desKey, byte[] desIV)
	 {
	     //Create the file streams to handle the input and output files.
	     FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
	     FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
	     fout.SetLength(0);

	     //Create variables to help with read and write.
	     byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
	     long rdlen = 0;              //This is the total number of bytes written.
	     long totlen = fin.Length;    //This is the total length of the input file.
	     int len;                     //This is the number of bytes to be written at a time.

	     SymmetricAlgorithm des = new DESCryptoServiceProvider();
         des.Padding = PaddingMode.PKCS7;
	     CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write);

	     Console.WriteLine("Decrypting...");

	     //Read from the input file, then encrypt and write to the output file.
	     while(rdlen < totlen)
	     {
	         len = fin.Read(bin, 0, 100);
	         encStream.Write(bin, 0, len);
	         rdlen = rdlen + len;
             Console.WriteLine("{0} bytes processed", rdlen);
	     }

	     encStream.Close();
    }
Exemplo n.º 5
0
 /// <summary>
 /// 对文件内容进行DES解密
 /// </summary>
 /// <param name="sourceFile">待解密的文件绝对路径</param>
 /// <param name="destFile">解密后的文件保存的绝对路径</param>
 public static void DecryptFile(string sourceFile, string destFile)
 {
     if (!File.Exists(sourceFile)) throw new FileNotFoundException("指定的文件路径不存在!", sourceFile);
     byte[] btKey = Encoding.Default.GetBytes(key);
     byte[] btIV = Encoding.Default.GetBytes(iv);
     DESCryptoServiceProvider des = new DESCryptoServiceProvider();
     byte[] btFile = File.ReadAllBytes(sourceFile);
     using (FileStream fs = new FileStream(destFile, FileMode.Create, FileAccess.Write))
     {
         try
         {
             using (CryptoStream cs = new CryptoStream(fs, des.CreateDecryptor(btKey, btIV), CryptoStreamMode.Write))
             {
                 cs.Write(btFile, 0, btFile.Length);
                 cs.FlushFinalBlock();
             }
         }
         catch
         {
             throw;
         }
         finally
         {
             fs.Close();
         }
     }
 }
Exemplo n.º 6
0
    //cmThe function used to decrypt the text
    private static string Decrypt(string strText, string SaltKey)
    {
        byte[] byKey = { };
        byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef };
        byte[] inputByteArray = new byte[strText.Length + 1];

        try
        {
            byKey = System.Text.Encoding.UTF8.GetBytes(SaltKey.Substring(0, 8));
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            inputByteArray = Convert.FromBase64String(strText);
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);

            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();
            System.Text.Encoding encoding = System.Text.Encoding.UTF8;

            return encoding.GetString(ms.ToArray());

        }
        catch (Exception ex)
        {
            return ex.Message;
        }
    }
Exemplo n.º 7
0
    private string DeCryption(string content, string sKey, string sIV)
    {
        try
        {
            byte[] inputByteArray = Convert.FromBase64String(content);
            using (DESCryptoServiceProvider desProvider = new DESCryptoServiceProvider())
            {
                //byte[] inputByteArray = Convert.FromBase64String(content);
                desProvider.Key = System.Text.Encoding.ASCII.GetBytes(sKey);
                desProvider.IV = System.Text.Encoding.ASCII.GetBytes(sIV);
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                using (CryptoStream cs = new CryptoStream(ms,desProvider.CreateDecryptor(), CryptoStreamMode.Write))
                {
                    //cs.Clear();
                    cs.Write(inputByteArray,0,inputByteArray.Length);
                    cs.FlushFinalBlock();
                    cs.Close();
                }

                string str = System.Text.Encoding.UTF8.GetString(ms.ToArray());
                ms.Close();
                return str;
            }
        }
        catch
        {
            return "String Not Base64 Encode!!!";
        }
    }
        /// <summary>
        /// 对数据进行解密
        /// </summary>
        /// <param name="decryptstring">需要解密的数据</param>
        /// <returns></returns>
        public static string Decode(string data)
        {
            byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
            byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);

            byte[] byEnc;
            try
            {
                byEnc = Convert.FromBase64String(data);
            }
            catch
            {
                return null;
            }

            try
            {
                DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
                MemoryStream ms = new MemoryStream(byEnc);
                CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);
                StreamReader sr = new StreamReader(cst);
                return sr.ReadToEnd();
            }
            catch
            {
                return null;
            }

        }
Exemplo n.º 9
0
 public static string Decrypt(string stringToDecrypt)
 {
     string sEncryptionKey = "thuynnxkey";
     byte[] key = { };
     byte[] IV = { 10, 20, 30, 40, 50, 60, 70, 80 };
     byte[] inputByteArray = new byte[stringToDecrypt.Length];
     try
     {
         key = Encoding.UTF8.GetBytes(sEncryptionKey.Substring(0, 8));
         DESCryptoServiceProvider des = new DESCryptoServiceProvider();
         inputByteArray = Convert.FromBase64String(stringToDecrypt);
         MemoryStream ms = new MemoryStream();
         CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(key, IV), CryptoStreamMode.Write);
         cs.Write(inputByteArray, 0, inputByteArray.Length);
         cs.FlushFinalBlock();
         cs.Close();
         Encoding encoding = Encoding.UTF8;
         return encoding.GetString(ms.ToArray());
     }
     catch (System.Exception ex)
     {
         SiAuto.Main.LogString("Lỗi :", ex.ToString());
         return (string.Empty);
     }
 }
Exemplo n.º 10
0
	public static SaveData Load()
	{
		if (!File.Exists("save01.sav"))
			return null;
			
		SaveData data = null;
		using(Stream stream = File.Open("save01.sav", FileMode.Open)) {
			BinaryFormatter binaryFormatter = new BinaryFormatter();
			binaryFormatter.Binder = new VersionDeserializationBinder(); 
			
			byte[] byKey = Encoding.UTF8.GetBytes(strEncrypt.Substring(0, 8));
			using (DESCryptoServiceProvider des = new DESCryptoServiceProvider()) {
				using (Stream cryptoStream = new CryptoStream(stream, des.CreateDecryptor(byKey, dv), CryptoStreamMode.Read))
				{
					Log.debug("Save", "Loading...");
					try {
						data = (SaveData) binaryFormatter.Deserialize(cryptoStream);
					} catch (Exception e) {
						Log.debug("Save", ""+e);
						return new SaveData();
					}
					Log.debug("Save", "Loaded (level={0})", data.level);
					cryptoStream.Close();
				}
			}
			stream.Close();
		}
		return data;
	}
Exemplo n.º 11
0
 public string Decrypt(string SourceData)
 {
     byte[] EncryptedDataBytes = Convert.FromBase64String(SourceData);
     MemoryStream TempStream = new MemoryStream(EncryptedDataBytes, 0, EncryptedDataBytes.Length);
     DESCryptoServiceProvider Decryptor = new DESCryptoServiceProvider();
     CryptoStream DecryptionStream = new CryptoStream(TempStream, Decryptor.CreateDecryptor(Key, Iv), CryptoStreamMode.Read);
     StreamReader AllDataReader = new StreamReader(DecryptionStream);
     return AllDataReader.ReadToEnd();
 }
Exemplo n.º 12
0
 public static string DESDecrypt(string input)
 {
     byte[] bytes = Encoding.ASCII.GetBytes((string)ConfigurationSettings.AppSettings["CipherKeyProd"]);
     DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
     MemoryStream memoryStream = new MemoryStream
             (Convert.FromBase64String(input));
     CryptoStream cryptoStream = new CryptoStream(memoryStream,
         cryptoProvider.CreateDecryptor(bytes, bytes), CryptoStreamMode.Read);
     StreamReader reader = new StreamReader(cryptoStream);
     return reader.ReadToEnd();
 }
Exemplo n.º 13
0
    /**/
    /// <summary>
    /// 对称加密解密的密钥
    /// </summary>
    public static string Key
    {
        get
        {
            return key;
        }
        set
        {
            key = value;
        }
    }

    #endregion Properties

    #region Methods

    /**/
    /// <summary>
    /// DES解密
    /// </summary>
    /// <param name="decryptString"></param>
    /// <returns></returns>
    public static string DesDecrypt(string decryptString)
    {
        byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 8));
        byte[] keyIV = keyBytes;
        byte[] inputByteArray = Convert.FromBase64String(decryptString);
        DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
        MemoryStream mStream = new MemoryStream();
        CryptoStream cStream = new CryptoStream(mStream, provider.CreateDecryptor(keyBytes, keyIV), CryptoStreamMode.Write);
        cStream.Write(inputByteArray, 0, inputByteArray.Length);
        cStream.FlushFinalBlock();
        return Encoding.UTF8.GetString(mStream.ToArray());
    }
Exemplo n.º 14
0
    public string Decrypt(string input)
    {
        string output = "";

        DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
        MemoryStream memoryStream = new MemoryStream(Convert.FromBase64String(input));
        CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoProvider.CreateDecryptor(cryptBytes, cryptBytes), CryptoStreamMode.Read);
        StreamReader reader = new StreamReader(cryptoStream);

        output = reader.ReadToEnd();
        return output;
    }
Exemplo n.º 15
0
 public static string DecryptDES(string text, byte[] key)
 {
     if(text != null && text != "")
     {
         DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
         MemoryStream memoryStream = new MemoryStream(Convert.FromBase64String(text));
         CryptoStream cryptoStream = new CryptoStream(memoryStream,
                 cryptoProvider.CreateDecryptor(key, key), CryptoStreamMode.Read);
         StreamReader reader = new StreamReader(cryptoStream);
         text = reader.ReadToEnd();
     }
     return text;
 }
Exemplo n.º 16
0
    //by me
    public string Decrypt(string oldword)
    {
        if (String.IsNullOrEmpty(oldword))
        {
            throw new ArgumentNullException("The string which needs to be decrypted can not be null.");
        }

        DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
        MemoryStream memoryStream = new MemoryStream(Convert.FromBase64String(oldword));
        CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoProvider.CreateDecryptor(bytes, bytes), CryptoStreamMode.Read);
        StreamReader reader = new StreamReader(cryptoStream);
        return reader.ReadToEnd();
    }
Exemplo n.º 17
0
    static Boolean Test()
    {

        Byte[]  PlainText = {0, 1, 2, 3, 4, 5, 6, 7}; //, 8, 9, 10, 11, 12, 13, 14, 15};
        Byte[]  Key = {1, 1, 1, 1, 1, 1, 1, 2};
        Byte[]  IV = {1, 1, 1, 1, 1, 1, 1, 1};
        
        Console.WriteLine("Encrypting the following bytes:");
        PrintByteArray(PlainText);
        
        DESCryptoServiceProvider     des = new DESCryptoServiceProvider();
        des.Mode = CipherMode.ECB;
//        des.FeedbackSize = 0;
		des.Padding = PaddingMode.None;

        Console.WriteLine("DES default key size = " + des.KeySize);
        ICryptoTransform sse = des.CreateEncryptor(Key, IV);
        Console.WriteLine("SSE mode = " + des.Mode);
        MemoryStream ms = new MemoryStream();
        CryptoStream    cs = new CryptoStream(ms, sse, CryptoStreamMode.Write);
        cs.Write(PlainText,0,PlainText.Length);
        cs.FlushFinalBlock();
        byte[] CipherText = ms.ToArray();
        cs.Close();

        Console.WriteLine("Cyphertext:");
        PrintByteArray(CipherText);
        

        Console.WriteLine("Decrypting...");

//        DESCryptoServiceProvider     des = new DESCryptoServiceProvider();
//        des.Mode = CipherMode.ECB;
//        des.FeedbackSize = 0;
        ICryptoTransform ssd = des.CreateDecryptor(Key, IV);
        Console.WriteLine("SSD mode = " + des.Mode);
        cs = new CryptoStream(new MemoryStream(CipherText), ssd, CryptoStreamMode.Read);

        byte[] NewPlainText = new byte[8];
        cs.Read(NewPlainText,0,8);

        PrintByteArray(NewPlainText);
        
        if (!Compare(PlainText, NewPlainText)) {
        	Console.WriteLine("ERROR: roundtrip failed");
        	return false;
        }
        
        return true;
    }
Exemplo n.º 18
0
    /// <summary>
    /// Standard DES decryption
    /// </summary>
    /// <param name="val">Value of decrypted</param>
    /// <returns>Returns decrypted value as string</returns>
    public static string Decrypt(string val)
    {
        string decrpted = "";
        if (val != "") {
            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();

            //convert from string to byte
            byte[] buffer = Convert.FromBase64String(val);
            MemoryStream ms = new MemoryStream(buffer);
            CryptoStream cs = new CryptoStream(ms, cryptoProvider.CreateDecryptor(KEY_64, IV_64), CryptoStreamMode.Read);
            StreamReader sr = new StreamReader(cs);
            decrpted = sr.ReadToEnd();
        }
        return decrpted;
    }
Exemplo n.º 19
0
 // 解密字符串
 public string DecryptString(string sInputString, string sKey)
 {
     string[] sInput = sInputString.Split("-".ToCharArray());
     var data = new byte[sInput.Length];
     for (int i = 0; i < sInput.Length; i++)
     {
         data[i] = byte.Parse(sInput[i], NumberStyles.HexNumber);
     }
     var DES = new DESCryptoServiceProvider();
     DES.Key = Encoding.ASCII.GetBytes(sKey);
     DES.IV = Encoding.ASCII.GetBytes(sKey);
     ICryptoTransform desencrypt = DES.CreateDecryptor();
     byte[] result = desencrypt.TransformFinalBlock(data, 0, data.Length);
     return Encoding.UTF8.GetString(result);
 }
Exemplo n.º 20
0
 /// <summary>   
 /// MD5解密   
 /// </summary>   
 /// <param name="Source">需要解密的字符串</param>   
 /// <returns>MD5解密后的字符串</returns>   
 public string Md5Decrypt(string Source)   
 {   
     //将解密字符串转换成字节数组   
     byte[] bytIn = System.Convert.FromBase64String(Source);   
     //给出解密的密钥和偏移量,密钥和偏移量必须与加密时的密钥和偏移量相同   
     byte[] iv = { 103, 16, 93, 156, 78, 4, 218, 32 };//定义偏移量   
     byte[] key = { 55, 103, 246, 79, 36, 99, 167, 3 };//定义密钥   
     DESCryptoServiceProvider mobjCryptoService = new DESCryptoServiceProvider();   
     mobjCryptoService.Key = iv;   
     mobjCryptoService.IV = key;   
     //实例流进行解密   
     System.IO.MemoryStream ms = new System.IO.MemoryStream(bytIn, 0, bytIn.Length);   
     ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor();   
     CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read);   
     StreamReader strd = new StreamReader(cs, Encoding.Default);   
     return strd.ReadToEnd();   
 }  
Exemplo n.º 21
0
 private string Decrypt(string pToDecrypt, string sKey)
 {
     DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
     byte[] buffer = new byte[pToDecrypt.Length / 2];
     for (int i = 0; i < (pToDecrypt.Length / 2); i++)
     {
         int num2 = Convert.ToInt32(pToDecrypt.Substring(i * 2, 2), 0x10);
         buffer[i] = (byte)num2;
     }
     provider.Key = Encoding.ASCII.GetBytes(sKey);
     provider.IV = Encoding.ASCII.GetBytes(sKey);
     MemoryStream stream = new MemoryStream();
     CryptoStream stream2 = new CryptoStream(stream, provider.CreateDecryptor(), CryptoStreamMode.Write);
     stream2.Write(buffer, 0, buffer.Length);
     stream2.FlushFinalBlock();
     new StringBuilder();
     return Encoding.Default.GetString(stream.ToArray());
 }
Exemplo n.º 22
0
    public static string Decrypt(string pstrText)
    {
        pstrText = pstrText.Replace(" ", "+");
        string pstrDecrKey = "1239;[pewGKG)NisarFidesTech";
        byte[] byKey = { };
        byte[] IV = { 18, 52, 86, 120, 144, 171, 205, 239 };
        byte[] inputByteArray = new byte[pstrText.Length];

        byKey = System.Text.Encoding.UTF8.GetBytes(pstrDecrKey.Substring(0, 8));
        DESCryptoServiceProvider des = new DESCryptoServiceProvider();
        inputByteArray = Convert.FromBase64String(pstrText);
        MemoryStream ms = new MemoryStream();
        CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);
        cs.Write(inputByteArray, 0, inputByteArray.Length);
        cs.FlushFinalBlock();
        System.Text.Encoding encoding = System.Text.Encoding.UTF8;
        return encoding.GetString(ms.ToArray());
    }
Exemplo n.º 23
0
	/// <summary>
	/// 解密原函数
	/// </summary>
	/// <param name="pToDecrypt"></param>
	/// <param name="sKey"></param>
	/// <returns></returns>
	static public string DesDecrypt(string pToDecrypt, string sKey)
	{
		DESCryptoServiceProvider des = new DESCryptoServiceProvider();
		byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
		for (int x = 0; x < pToDecrypt.Length / 2; x++)
		{
			int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
			inputByteArray[x] = (byte)i;
		}
		des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
		des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
		MemoryStream ms = new MemoryStream();
		CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
		cs.Write(inputByteArray, 0, inputByteArray.Length);
		cs.FlushFinalBlock();
		StringBuilder ret = new StringBuilder();
		
		return System.Text.Encoding.UTF8.GetString(ms.ToArray());
	}
Exemplo n.º 24
0
 public static string DesDecrypt(string toDecryptString,string keyStr)
 {
     byte[] toDecryptBytes = Convert.FromBase64String(toDecryptString);
     using (var des = new DESCryptoServiceProvider())
     {
         des.Key = Encoding.GetBytes(keyStr);
         des.IV = Encoding.GetBytes(keyStr);
         var ms = new MemoryStream();
         using (var cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write))
         {
             cs.Write(toDecryptBytes, 0, toDecryptBytes.Length);
             cs.FlushFinalBlock();
             cs.Close();
         }
         string decryptedString = Encoding.GetString(ms.ToArray());
         ms.Close();
         return decryptedString;
     }
 }
Exemplo n.º 25
0
 /// <summary>
 /// DES解密字符串
 /// </summary>
 /// <param name="decryptString">待解密的字符串</param>
 /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
 /// <returns>解密成功返回解密后的字符串,失败返源串</returns>
 public static string DecryptDES(string decryptString, string decryptKey)
 {
     try
     {
         byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
         byte[] rgbIV = Keys;
         byte[] inputByteArray = Convert.FromBase64String(decryptString);
         DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
         MemoryStream mStream = new MemoryStream();
         CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
         cStream.Write(inputByteArray, 0, inputByteArray.Length);
         cStream.FlushFinalBlock();
         return Encoding.UTF8.GetString(mStream.ToArray());
     }
     catch
     {
         return decryptString;
     }
 }
Exemplo n.º 26
0
 /// <summary> 
 ///  MD5����
 /// </summary>  
 public static string MD5Decrypt(string Text, string sKey)
 {
     DESCryptoServiceProvider des = new DESCryptoServiceProvider();
     int len;
     len = Text.Length / 2;
     byte[] inputByteArray = new byte[len];
     int x, i;
     for (x = 0; x < len; x++)
     {
         i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
         inputByteArray[x] = (byte)i;
     }
     des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
     des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
     System.IO.MemoryStream ms = new System.IO.MemoryStream();
     CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
     cs.Write(inputByteArray, 0, inputByteArray.Length);
     cs.FlushFinalBlock();
     return Encoding.Default.GetString(ms.ToArray());
 }
Exemplo n.º 27
0
 public static string DESDecrypt(string str, string key)
 {
     try
         {
             str = str.Replace('*', '+');
             byte[] rgbKey = System.Text.Encoding.UTF8.GetBytes(key);
             byte[] rgbIV = rgbKey;
             byte[] inputByteArray = Convert.FromBase64String(str);
             DESCryptoServiceProvider des = new DESCryptoServiceProvider();
             System.IO.MemoryStream mStream = new System.IO.MemoryStream();
             CryptoStream cStream = new CryptoStream(mStream, des.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
             cStream.Write(inputByteArray, 0, inputByteArray.Length);
             cStream.FlushFinalBlock();
             return System.Text.Encoding.UTF8.GetString(mStream.ToArray());
         }
         catch
         {
             return "";
         }
 }
 public string Decrypt(string stringToDecrypt, string sEncryptionKey)
 {
     byte[] inputByteArray = new byte[stringToDecrypt.Length + 1];
     try
     {
         key = System.Text.Encoding.UTF8.GetBytes(sEncryptionKey);
         DESCryptoServiceProvider des = new DESCryptoServiceProvider();
         inputByteArray = Convert.FromBase64String(stringToDecrypt);
         MemoryStream ms = new MemoryStream();
         CryptoStream cs = new CryptoStream(ms,
           des.CreateDecryptor(key, IV), CryptoStreamMode.Write);
         cs.Write(inputByteArray, 0, inputByteArray.Length);
         cs.FlushFinalBlock();
         System.Text.Encoding encoding = System.Text.Encoding.UTF8;
         return encoding.GetString(ms.ToArray());
     }
     catch (Exception e)
     {
         return e.Message;
     }
 }
Exemplo n.º 29
0
    /// DES解密
    public string MD5Decrypt(string pToDecrypt, string sKey)
    {
        var des = new DESCryptoServiceProvider();

        var inputByteArray = new byte[pToDecrypt.Length/2];
        for (int x = 0; x < pToDecrypt.Length/2; x++)
        {
            int i = (Convert.ToInt32(pToDecrypt.Substring(x*2, 2), 16));
            inputByteArray[x] = (byte) i;
        }

        des.Key = Encoding.ASCII.GetBytes(sKey);
        des.IV = Encoding.ASCII.GetBytes(sKey);
        var ms = new MemoryStream();
        var cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
        cs.Write(inputByteArray, 0, inputByteArray.Length);
        cs.FlushFinalBlock();

        var ret = new StringBuilder();

        return Encoding.Default.GetString(ms.ToArray());
    }
Exemplo n.º 30
0
    ///
    /// dec 解密过程
    ///
    ///
    ///
    ///
    public string decrypt(string ptodecrypt, string skey)
    {
        DESCryptoServiceProvider des = new DESCryptoServiceProvider();

        byte[] inputbytearray = new byte[ptodecrypt.Length / 2];
        for (int x = 0; x < ptodecrypt.Length / 2; x++)
        {
            int i = (Convert.ToInt32(ptodecrypt.Substring(x * 2, 2), 16));
            inputbytearray[x] = (byte)i;
        }

        des.Key = ASCIIEncoding.ASCII.GetBytes(skey); //建立加密对象的密钥和偏移量,此值重要,不能修改
        des.IV  = ASCIIEncoding.ASCII.GetBytes(skey);
        MemoryStream ms = new MemoryStream();
        CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);

        cs.Write(inputbytearray, 0, inputbytearray.Length);
        cs.FlushFinalBlock();

        StringBuilder ret = new StringBuilder(); //建立stringbuild对象,createdecrypt使用的是流对象,必须把解密后的文本变成流对象

        return(System.Text.Encoding.Default.GetString(ms.ToArray()));
    }
Exemplo n.º 31
0
 public static string DecryptData(string STRING)
 {
     try
     {
         //Have a Key
         byte[] myKey = Encoding.ASCII.GetBytes("ActisKey");
         //Have a vector required  to create a Crypto stream
         byte[] myVector = Encoding.ASCII.GetBytes("ActisKey");
         //Create a Service Provider object
         DESCryptoServiceProvider myCryptoProvider = new DESCryptoServiceProvider();
         //Create a memory strem
         MemoryStream myMemoryStream = new MemoryStream(Convert.FromBase64String(STRING));
         //Create a Cryptro memory stream
         CryptoStream myCryptoStream = new CryptoStream(myMemoryStream, myCryptoProvider.CreateDecryptor(myKey, myVector), CryptoStreamMode.Read);
         //HAve a reader
         StreamReader myReader = new StreamReader(myCryptoStream);
         return(myReader.ReadToEnd());
     }
     catch (Exception ex)
     {
         throw ex;
     }
 }
Exemplo n.º 32
0
        //C# DES解密方法
        public static string DESDecrypt(string encryptedValue, string key, string iv)
        {
            key = Util.MD5Encrypt32(key).Substring(0, 8);
            using (DESCryptoServiceProvider sa = new DESCryptoServiceProvider {
                Key = Encoding.UTF8.GetBytes(key), IV = Encoding.UTF8.GetBytes(iv)
            })
            {
                using (ICryptoTransform ct = sa.CreateDecryptor())
                {
                    byte[] byt = Convert.FromBase64String(encryptedValue);

                    using (var ms = new MemoryStream())
                    {
                        using (var cs = new CryptoStream(ms, ct, CryptoStreamMode.Write))
                        {
                            cs.Write(byt, 0, byt.Length);
                            cs.FlushFinalBlock();
                        }
                        return(Encoding.UTF8.GetString(ms.ToArray()));
                    }
                }
            }
        }
Exemplo n.º 33
0
        public void button1_Click(object sender, EventArgs e)
        {
            t.Start();
            TcpClient p = t.AcceptTcpClient();

            ns = p.GetStream();
            byte[] buffer = new byte[1024];
            new Thread(() =>
            {
                while (true)
                {
                    int size        = ns.Read(buffer, 0, buffer.Length);
                    MemoryStream tw = new MemoryStream();
                    CryptoStream we = new CryptoStream(tw, provider.CreateDecryptor(), CryptoStreamMode.Write);
                    we.Write(buffer, 0, size);
                    we.FlushFinalBlock();
                    Invoke(new Action(() =>
                    {
                        listBox1.Items.Add(Encoding.ASCII.GetString(tw.ToArray()));
                    }));
                }
            }).Start();
        }
Exemplo n.º 34
0
        /// <summary>
        ///     DES解密
        /// </summary>
        /// <param name="data">解密数据</param>
        /// <param name="key">8位字符的密钥字符串(需要和加密时相同)</param>
        /// <param name="iv">8位字符的初始化向量字符串(需要和加密时相同)</param>
        /// <returns></returns>
        public static string DesDecrypt(string data,
                                        string key,
                                        string iv)
        {
            var byKey = Encoding.ASCII.GetBytes(key);
            var byIv  = Encoding.ASCII.GetBytes(iv);

            byte[] byEnc;
            try
            {
                byEnc = Convert.FromBase64String(data);
            }
            catch
            {
                return(null);
            }
            var cryptoProvider = new DESCryptoServiceProvider();
            var ms             = new MemoryStream(byEnc);
            var cst            = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIv), CryptoStreamMode.Read);
            var sr             = new StreamReader(cst);

            return(sr.ReadToEnd());
        }
Exemplo n.º 35
0
        public static string Decrypt(string pToDecrypt)
        {
            string s1 = "SeiweLL0";
            string s2 = "0SeiweLL";
            DESCryptoServiceProvider cryptoServiceProvider = new DESCryptoServiceProvider();

            byte[] buffer = new byte[pToDecrypt.Length / 2];
            for (int index = 0; index < pToDecrypt.Length / 2; ++index)
            {
                int int32 = Convert.ToInt32(pToDecrypt.Substring(index * 2, 2), 16);
                buffer[index] = (byte)int32;
            }
            cryptoServiceProvider.Key = Encoding.ASCII.GetBytes(s1);
            cryptoServiceProvider.IV  = Encoding.ASCII.GetBytes(s2);
            MemoryStream memoryStream = new MemoryStream();
            CryptoStream cryptoStream = new CryptoStream((Stream)memoryStream, cryptoServiceProvider.CreateDecryptor(), CryptoStreamMode.Write);

            cryptoStream.Write(buffer, 0, buffer.Length);
            cryptoStream.FlushFinalBlock();
            StringBuilder stringBuilder = new StringBuilder();

            return(Encoding.Default.GetString(memoryStream.ToArray()));
        }
Exemplo n.º 36
0
        /// <summary>
        /// DES解密字符串
        /// </summary>
        /// <param name="decryptString">待解密的字符串</param>
        /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
        /// <returns>解密成功返回解密后的字符串,失败返源串</returns>
        public static string DesDecrypt(string decryptString, string decryptKey)
        {
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            int len;

            len = decryptString.Length / 2;
            byte[] inputByteArray = new byte[len];
            int    x, i;

            for (x = 0; x < len; x++)
            {
                i = Convert.ToInt32(decryptString.Substring(x * 2, 2), 16);
                inputByteArray[x] = (byte)i;
            }
            des.Key = ASCIIEncoding.ASCII.GetBytes(GetMD5(decryptKey).Substring(0, 8));
            des.IV  = ASCIIEncoding.ASCII.GetBytes(GetMD5(decryptKey).Substring(0, 8));
            System.IO.MemoryStream ms = new System.IO.MemoryStream();
            CryptoStream           cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);

            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();
            return(Encoding.Default.GetString(ms.ToArray()));
        }
Exemplo n.º 37
0
 /// <summary>
 /// DES解密字符串
 /// </summary>
 /// <param name="decryptString">待解密的字符串</param>
 /// <returns></returns>
 public static string DESDecrypt(this string decryptString)
 {
     try
     {
         var bytes = Convert.FromBase64String(decryptString);
         using (var des = new DESCryptoServiceProvider())
         {
             using (var stream = new MemoryStream())
             {
                 using (var cryptoStream = new CryptoStream(stream, des.CreateDecryptor(RgbKey, RgbIV), CryptoStreamMode.Write))
                 {
                     cryptoStream.Write(bytes, 0, bytes.Length);
                     cryptoStream.FlushFinalBlock();
                     return(Encoding.UTF8.GetString(stream.ToArray()));
                 }
             }
         }
     }
     catch
     {
         return(string.Empty);
     }
 }
Exemplo n.º 38
0
        /// <summary>
        /// DES解密字符串
        /// </summary>
        /// <param name="decryptString">待解密的字符串</param>
        /// <param name="decryptKey">解密密钥,和加密密钥相同</param>
        /// <returns>解密成功返回解密后的字符串,失败返源串</returns>
        public static string Decode(string decryptString, string decryptKey = "www.GMS.com")
        {
            try
            {
                decryptKey = MD5(decryptKey);
                decryptKey = decryptKey.Substring(0, 8);
                decryptKey = decryptKey.PadRight(8, ' ');
                byte[] rgbKey                 = Encoding.UTF8.GetBytes(decryptKey);
                byte[] rgbIV                  = keys;
                byte[] inputByteArray         = Convert.FromBase64String(decryptString);
                DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();

                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                cStream.Write(inputByteArray, 0, inputByteArray.Length);
                cStream.FlushFinalBlock();
                return(Encoding.UTF8.GetString(mStream.ToArray()));
            }
            catch
            {
                return("");
            }
        }
Exemplo n.º 39
0
        public string Decrypt(string pText, string pDecrKey)
        {
            string str = "";

            byte[] rgbIV  = new byte[] { 0x12, 0x34, 0x56, 120, 0x90, 0xab, 0xcd, 0xef };
            byte[] buffer = new byte[pText.Length + 1];
            try
            {
                byte[] bytes = Encoding.UTF8.GetBytes(Strings.Left(pDecrKey, 8));
                DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
                buffer = Convert.FromBase64String(pText);
                MemoryStream stream2 = new MemoryStream();
                CryptoStream stream  = new CryptoStream(stream2, provider.CreateDecryptor(bytes, rgbIV), CryptoStreamMode.Write);
                stream.Write(buffer, 0, buffer.Length);
                stream.FlushFinalBlock();
                str = Encoding.UTF8.GetString(stream2.ToArray());
            }
            catch (Exception exception1)
            {
                str = "Decrypt error" + exception1.StackTrace;
            }
            return(str);
        }
Exemplo n.º 40
0
 /// <summary>
 /// DES对称解密,密钥必须为8位
 /// </summary>
 /// <param name="textToDecrypt"></param>
 /// <param name="key"></param>
 /// <returns></returns>
 public static string DESDecrypt(string textToDecrypt, string key)
 {
     if (string.IsNullOrEmpty(key) || key.Length != 8)
     {
         throw new Error("请提供有效的8位密钥");
     }
     byte[] inputByteArray = Convert.FromBase64String(textToDecrypt);
     using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
     {
         des.Key = ASCIIEncoding.ASCII.GetBytes(key);
         des.IV  = ASCIIEncoding.ASCII.GetBytes(key);
         System.IO.MemoryStream ms = new System.IO.MemoryStream();
         using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write))
         {
             cs.Write(inputByteArray, 0, inputByteArray.Length);
             cs.FlushFinalBlock();
             cs.Close();
         }
         string str = Encoding.UTF8.GetString(ms.ToArray());
         ms.Close();
         return(str);
     }
 }
Exemplo n.º 41
0
Arquivo: DES.cs Projeto: jimmy668/XM
        //DES解密
        private static string DESDecode(string decodeStr)
        {
            string key = "nimeiaaa";

            DESCryptoServiceProvider des = new DESCryptoServiceProvider();

            byte[] inputByteArray = new byte[decodeStr.Length / 2];
            for (int x = 0; x < decodeStr.Length / 2; x++)
            {
                int i = (Convert.ToInt32(decodeStr.Substring(x * 2, 2), 16));
                inputByteArray[x] = (byte)i;
            }
            des.Key = ASCIIEncoding.ASCII.GetBytes(key);
            des.IV  = ASCIIEncoding.ASCII.GetBytes(key);
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);

            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();
            StringBuilder ret = new StringBuilder();

            return(System.Text.Encoding.Default.GetString(ms.ToArray()));
        }
Exemplo n.º 42
0
    static string DESDecryptStringFromBytes(byte[] cipherText, byte[] Key, byte[] IV)
    {
        string plaintext = null;

        using (DESCryptoServiceProvider des = new DESCryptoServiceProvider()) {
            des.Key       = Key;
            des.IV        = new byte[IV.Length];
            des.Padding   = PaddingMode.PKCS7;
            des.BlockSize = 64;
            des.Mode      = CipherMode.ECB;

            ICryptoTransform decryptor = des.CreateDecryptor(des.Key, des.IV);

            using (MemoryStream msDecrypt = new MemoryStream(cipherText)) {
                using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)) {
                    using (StreamReader srDecrypt = new StreamReader(csDecrypt)) {
                        plaintext = srDecrypt.ReadToEnd();
                    }
                }
            }
        }
        return(plaintext);
    }
Exemplo n.º 43
0
        // Methods
        public static string Decrypt(this string cryptedString, byte[] key)
        {
            if (string.IsNullOrEmpty(cryptedString))
            {
                throw new ArgumentNullException("The string which needs to be decrypted can not be null.");
            }
            if (key.Length < 8)
            {
                throw new ArgumentException("Password key length should be nore than 8");
            }
            byte[] destinationArray = new byte[8];
            Array.Copy(key, destinationArray, 8);
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
            MemoryStream             stream   = new MemoryStream(Convert.FromBase64String(cryptedString));
            CryptoStream             stream2  = new CryptoStream(stream, provider.CreateDecryptor(destinationArray, destinationArray), CryptoStreamMode.Read);
            string str = new StreamReader(stream2).ReadToEnd();

            if (string.CompareOrdinal(str, EMPTY) == 0)
            {
                return(string.Empty);
            }
            return(str);
        }
Exemplo n.º 44
0
        public static string Decrypt(string EncryptedText)
        {
            byte[] inputByteArray = new byte[EncryptedText.Length + 1];
            byte[] rgbIV          = { 0x21, 0x43, 0x56, 0x87, 0x10, 0xfd, 0xea, 0x1c };
            byte[] key            = { };

            try
            {
                key = System.Text.Encoding.UTF8.GetBytes("A0D1nX0Q");
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                inputByteArray = Convert.FromBase64String(EncryptedText);
                MemoryStream ms = new MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(key, rgbIV), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                System.Text.Encoding encoding = System.Text.Encoding.UTF8;
                return(encoding.GetString(ms.ToArray()));
            }
            catch (Exception e)
            {
                return(e.Message);
            }
        }
Exemplo n.º 45
0
 public static string DecryptDESECBPKCS7(string source, string key)
 {
     try
     {
         DESCryptoServiceProvider des = new DESCryptoServiceProvider();
         byte[] sourceArray           = Convert.FromBase64String(source);
         des.Mode    = CipherMode.ECB;
         des.Padding = PaddingMode.PKCS7;
         des.Key     = Encoding.UTF8.GetBytes(key);
         des.IV      = Encoding.UTF8.GetBytes(key);
         MemoryStream ms = new MemoryStream();
         CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
         cs.Write(sourceArray, 0, sourceArray.Length);
         cs.FlushFinalBlock();
         cs.Close();
         ms.Close();
         return(Encoding.UTF8.GetString(ms.ToArray()));
     }
     catch (Exception)
     {
         return("");
     }
 }
Exemplo n.º 46
0
 /// <summary>
 /// 解密字符串
 /// </summary>
 /// <param name="decryptString">待解密的字符串</param>
 /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
 /// <returns>解密成功返回解密后的字符串,失败返源串</returns>
 public static string DecryptDES(string decryptString, string decryptKey)
 {
     try
     {
         byte[] rgbKey                 = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
         byte[] rgbIV                  = Keys;
         byte[] inputByteArray         = Convert.FromBase64String(decryptString);
         DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
         using (MemoryStream mStream = new MemoryStream())
         {
             using (CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write))
             {
                 cStream.Write(inputByteArray, 0, inputByteArray.Length);
                 cStream.FlushFinalBlock();
                 return(Encoding.UTF8.GetString(mStream.ToArray()));
             }
         }
     }
     catch
     {
         return(decryptString);
     }
 }
Exemplo n.º 47
0
 /// <summary>
 /// 对DES加密后的字符串进行解密
 /// </summary>
 /// <param name="encryptedString">待解密的字符串</param>
 /// <returns>解密后的字符串</returns>
 public static string Decrypt(string encryptedString)
 {
     byte[] btKey = Encoding.Default.GetBytes(key);
     byte[] btIV = Encoding.Default.GetBytes(iv);
     DESCryptoServiceProvider des = new DESCryptoServiceProvider();
     using (MemoryStream ms = new MemoryStream())
     {
         byte[] inData = Convert.FromBase64String(encryptedString);
         try
         {
             using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(btKey, btIV), CryptoStreamMode.Write))
             {
                 cs.Write(inData, 0, inData.Length);
                 cs.FlushFinalBlock();
             }
             return Encoding.Default.GetString(ms.ToArray());
         }
         catch
         {
             throw;
         }
     }
 }
Exemplo n.º 48
0
        /// <summary>
        /// Metoda koja dekriptira sadržaj na temelju ključa i inicijalizacijskoga vektora
        /// </summary>
        /// <param name="dataToDecrypt"></param>
        /// <returns></returns>
        public override string DecryptData(string dataToDecrypt)
        {
            string result;
            var    data = Convert.FromBase64String(dataToDecrypt);

            using (var des = new DESCryptoServiceProvider())
            {
                des.Mode    = CipherMode.CBC;
                des.Padding = PaddingMode.PKCS7;
                des.Key     = key;
                des.IV      = IV;
                using (var memoryStream = new MemoryStream())
                {
                    var cryptoStream = new CryptoStream(memoryStream,
                                                        des.CreateDecryptor(), CryptoStreamMode.Write);
                    cryptoStream.Write(data, 0, data.Length);
                    cryptoStream.FlushFinalBlock();
                    var decryptBytes = memoryStream.ToArray();
                    result = Encoding.UTF8.GetString(decryptBytes);
                    return(result);
                }
            }
        }
Exemplo n.º 49
0
        public static string Decrypt(string str, string shortKey)
        {
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();

            des.Mode    = CipherMode.ECB;//java默认是ECB
            des.Padding = PaddingMode.PKCS7;
            byte[] inputByteArray = new byte[str.Length / 2];
            for (int x = 0; x < str.Length / 2; x++)
            {
                int i = (Convert.ToInt32(str.Substring(x * 2, 2), 16));
                inputByteArray[x] = (byte)i;
            }
            des.Key = Encoding.UTF8.GetBytes(shortKey);
            des.IV  = Encoding.UTF8.GetBytes(shortKey);
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);

            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();
            StringBuilder ret = new StringBuilder();

            return(System.Text.Encoding.Default.GetString(ms.ToArray()));
        }
Exemplo n.º 50
0
        /// <summary>
        /// 解密数据
        /// </summary>
        /// <param name="Text"></param>
        /// <param name="sKey"></param>
        /// <returns></returns>
        public static string Decrypt(string Text, string sKey)
        {
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            int len;

            len = Text.Length / 2;
            byte[] inputByteArray = new byte[len];
            int    x, i;

            for (x = 0; x < len; x++)
            {
                i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
                inputByteArray[x] = (byte)i;
            }
            des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
            des.IV  = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
            System.IO.MemoryStream ms = new System.IO.MemoryStream();
            CryptoStream           cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);

            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();
            return(Encoding.Default.GetString(ms.ToArray()));
        }
Exemplo n.º 51
0
 /// <summary>
 /// Decrypts the specified string to decrypt.
 /// </summary>
 /// <param name="stringToDecrypt">The string to decrypt.</param>
 /// <param name="decryptionKey">The decryption key.</param>
 /// <returns>Return string</returns>
 public string Decrypt(string stringToDecrypt, string decryptionKey)
 {
     ///// byte[] inputByteArray = new byte[stringToDecrypt.Length + 1];
     byte[] inputByteArray;
     try
     {
         stringToDecrypt = stringToDecrypt.Replace(" ", "+");
         stringToDecrypt = stringToDecrypt.Replace("-", "/");
         this.key        = System.Text.Encoding.UTF8.GetBytes(this.Left(decryptionKey, 8));
         DESCryptoServiceProvider des = new DESCryptoServiceProvider();
         inputByteArray = Convert.FromBase64String(stringToDecrypt);
         MemoryStream ms = new MemoryStream();
         CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(this.key, this.iV), CryptoStreamMode.Write);
         cs.Write(inputByteArray, 0, inputByteArray.Length);
         cs.FlushFinalBlock();
         System.Text.Encoding encoding = System.Text.Encoding.UTF8;
         return(encoding.GetString(ms.ToArray()));
     }
     catch (Exception e)
     {
         return(e.Message);
     }
 }
Exemplo n.º 52
0
        /// <summary>
        /// 解密
        /// </summary>
        /// <param name="key"></param>
        /// <param name="data"></param>
        /// <returns></returns>
        public static string Decrypt(string key, string data)
        {
            if (string.IsNullOrEmpty(data))
            {
                return(string.Empty);
            }

            byte[] rgbKey = Encoding.UTF8.GetBytes(key);
            byte[] rgbIV  = Encoding.UTF8.GetBytes(key);

            byte[] inputByteArray         = HexStringToByteArray(data);
            DESCryptoServiceProvider desc = new DESCryptoServiceProvider();

            desc.Mode    = CipherMode.CBC;
            desc.Padding = PaddingMode.PKCS7;
            MemoryStream mStream = new MemoryStream();
            CryptoStream cStream = new CryptoStream(mStream, desc.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);

            cStream.Write(inputByteArray, 0, inputByteArray.Length);
            cStream.FlushFinalBlock();

            return(Encoding.UTF8.GetString(mStream.ToArray()));
        }
Exemplo n.º 53
0
 /// DES解密
 /// <param >待解密的字符串</param>
 /// <param >解密密钥,要求为8位,和加密密钥相同</param>
 /// <returns>解密成功返回解密后的字符串,失败返源串</returns>
 public static string Decrypt(string decryptString)
 {
     try
     {
         Encoding ed = Encoding.UTF8;
         decryptString = ed.GetString(Convert.FromBase64String(decryptString));
         string decryptKey                = KeyValue;
         byte[] rgbKey                    = Encoding.UTF8.GetBytes(decryptKey);
         byte[] rgbIV                     = Keys;
         byte[] inputByteArray            = Convert.FromBase64String(decryptString);
         DESCryptoServiceProvider DCSP    = new DESCryptoServiceProvider();
         MemoryStream             mStream = new MemoryStream();
         CryptoStream             cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
         cStream.Write(inputByteArray, 0, inputByteArray.Length);
         cStream.FlushFinalBlock();
         return(Encoding.UTF8.GetString(mStream.ToArray()));
     }
     catch
     {
         //return decryptString;
         return("Decrypt Failed!");
     }
 }
        public void Decrypt(string inputFilename,
                            string outputFilename,
                            string sKey)
        {
            sKey = Base64Encode(sKey);
            DESCryptoServiceProvider DES = new DESCryptoServiceProvider();

            DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
            DES.IV  = ASCIIEncoding.ASCII.GetBytes(sKey);
            FileStream fsread = new FileStream(inputFilename,
                                               FileMode.Open,
                                               FileAccess.Read);

            ICryptoTransform desdecrypt       = DES.CreateDecryptor();
            CryptoStream     cryptostreamDecr = new CryptoStream(fsread,
                                                                 desdecrypt,
                                                                 CryptoStreamMode.Read);
            StreamWriter fsDecrypted = new StreamWriter(outputFilename);

            fsDecrypted.Write(new StreamReader(cryptostreamDecr).ReadToEnd());
            fsDecrypted.Flush();
            fsDecrypted.Close();
        }
Exemplo n.º 55
0
 /// <summary>
 /// DES解密字符串
 /// </summary>
 /// <param name="toDecryptString">待解密的字符串</param>
 /// <returns>解密成功返回解密后的字符串,失败返源串</returns>
 public static string Decrypt(string toDecryptString)
 {
     try
     {
         if (toDecryptString == null || toDecryptString == "" || toDecryptString == string.Empty)
         {
             return("");
         }
         byte[] rgbKey                    = Encoding.UTF8.GetBytes(key);
         byte[] rgbIV                     = IV;
         byte[] inputByteArray            = Convert.FromBase64String(toDecryptString);
         DESCryptoServiceProvider DCSP    = new DESCryptoServiceProvider();
         MemoryStream             mStream = new MemoryStream();
         CryptoStream             cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
         cStream.Write(inputByteArray, 0, inputByteArray.Length);
         cStream.FlushFinalBlock();
         return(Encoding.UTF8.GetString(mStream.ToArray()));
     }
     catch
     {
         return(toDecryptString);
     }
 }
Exemplo n.º 56
0
        ///MD5解密
        public static string MD5Decrypt(string pToDecrypt, string sKey)
        {
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();

            byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
            for (int x = 0; x < pToDecrypt.Length / 2; x++)
            {
                int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
                inputByteArray[x] = (byte)i;
            }

            des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
            des.IV  = ASCIIEncoding.ASCII.GetBytes(sKey);
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);

            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();

            StringBuilder ret = new StringBuilder();

            return(System.Text.Encoding.Default.GetString(ms.ToArray()));
        }
Exemplo n.º 57
0
        public static string Decrypt(string text)
        {
            try
            {
                key = Encoding.UTF8.GetBytes(stringKey.Substring(0, 8));

                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                Byte[] byteArray             = Convert.FromBase64String(text);

                MemoryStream memoryStream = new MemoryStream();
                CryptoStream cryptoStream = new CryptoStream(memoryStream,
                                                             des.CreateDecryptor(key, IV), CryptoStreamMode.Write);

                cryptoStream.Write(byteArray, 0, byteArray.Length);
                cryptoStream.FlushFinalBlock();

                return(Encoding.UTF8.GetString(memoryStream.ToArray()));
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
Exemplo n.º 58
0
 /// <summary>
 /// DES解密字符串
 /// </summary>
 /// <param name="decryptString">待解密的字符串</param>
 /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
 /// <returns>解密成功返回解密后的字符串,失败返源串</returns>
 public static string DecryptDES(string decryptString)
 {
     if (decryptString == "")
     {
         return("");
     }
     try
     {
         byte[] rgbKey                    = Encoding.UTF8.GetBytes("openblog");
         byte[] rgbIV                     = Keys;
         byte[] inputByteArray            = Convert.FromBase64String(decryptString);
         DESCryptoServiceProvider DCSP    = new DESCryptoServiceProvider();
         MemoryStream             mStream = new MemoryStream();
         CryptoStream             cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
         cStream.Write(inputByteArray, 0, inputByteArray.Length);
         cStream.FlushFinalBlock();
         return(Encoding.UTF8.GetString(mStream.ToArray()));
     }
     catch (Exception ex)
     {
         return(ex.Message);
     }
 }
Exemplo n.º 59
0
        /// <summa
        /// 解密数据
        /// </summary>
        /// <param name="Text"></param>
        /// <param name="sKey"></param>
        /// <returns></returns>
        public static string Decrypt(string Text, string sKey)
        {
            DESCryptoServiceProvider dESCryptoServiceProvider = new DESCryptoServiceProvider();
            int num = Text.Length / 2;

            byte[] array = new byte[num];
            for (int i = 0; i < num; i++)
            {
                int num2 = Convert.ToInt32(Text.Substring(i * 2, 2), 16);
                array[i] = (byte)num2;
            }
            dESCryptoServiceProvider.Key = Encoding.ASCII.GetBytes(MD5Lower(sKey).Substring(0, 8));
            dESCryptoServiceProvider.IV  = Encoding.ASCII.GetBytes(MD5Lower(sKey).Substring(0, 8));
            using (MemoryStream memoryStream = new MemoryStream())
            {
                using (CryptoStream cryptoStream = new CryptoStream(memoryStream, dESCryptoServiceProvider.CreateDecryptor(), CryptoStreamMode.Write))
                {
                    cryptoStream.Write(array, 0, array.Length);
                    cryptoStream.FlushFinalBlock();
                    return(Encoding.Default.GetString(memoryStream.ToArray()));
                }
            }
        }
Exemplo n.º 60
0
        /// <summary>
        /// DES解密
        /// </summary>
        /// <param name="pwd">密文</param>
        /// <param name="key">密钥</param>
        /// <returns>明文</returns>
        public static string DESDecrypt(string decryptString, string key)
        {
            //默认向量
            byte[] ivs = { 0x13, 0x24, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

            using (DESCryptoServiceProvider dES = new DESCryptoServiceProvider())
            {
                byte[] inputByteArray = Convert.FromBase64String(decryptString);
                dES.Key = ASCIIEncoding.ASCII.GetBytes(key);
                dES.IV  = ivs;

                MemoryStream memory = new MemoryStream();
                using (CryptoStream csStream = new CryptoStream(memory, dES.CreateDecryptor(), CryptoStreamMode.Write))
                {
                    csStream.Write(inputByteArray, 0, inputByteArray.Length);
                    csStream.FlushFinalBlock();
                }

                string result = Encoding.UTF8.GetString(memory.ToArray());
                memory.Close();
                return(result);
            }
        }