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Code to encrypt the Password or any string

Discussion in 'ASP.NET' started by hanusoftware, Jul 5, 2007.

  1. hanusoftware

    hanusoftware New Member

    Joined:
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    Code:
    /// <summary>
    /// This method retrieve the string to encrypt from the Presentation Layer
    /// And return the Encrypted String
    /// </summary>
    /// <param name="str">
    /// <returns>
    public string encryptPassword(string strText)
    {
    	return Encrypt(strText, "&%#@?,:*");
    }
    
    /// <summary>
    /// This method retrieve the encrypted string to decrypt from the Presentation Layer
    /// And return the decrypted string
    /// </summary>
    /// <param name="str">
    /// <returns>
    public string decryptPassword(string str)
    {
    	return Decrypt(str, "&%#@?,:*");
    }
    
    /// <summary>
    /// This method has been used to get the Encrypetd string for the
    /// passed string
    /// </summary>
    /// <param name="strText">
    /// <param name="strEncrypt">
    /// <returns>
    private string Encrypt(string strText, string strEncrypt)
    {
    	byte[] byKey = new byte[20];
    	byte[] dv ={ 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
    	try
    	{
    		byKey = System.Text.Encoding.UTF8.GetBytes(strEncrypt.Substring(0, 8));
    		DESCryptoServiceProvider des = new DESCryptoServiceProvider();
    		byte[] inputArray = System.Text.Encoding.UTF8.GetBytes(strText);
    		MemoryStream ms = new MemoryStream();
    		CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, dv), CryptoStreamMode.Write);
    
    		cs.Write(inputArray, 0, inputArray.Length);
    		cs.FlushFinalBlock();
    
    		return Convert.ToBase64String(ms.ToArray());
    	}
    	catch (Exception ex)
    	{
    		throw ex;
    	}
    }
    
    /// <summary>
    /// This method has been used to Decrypt the Encrypted String
    /// </summary>
    /// <param name="strText">
    /// <param name="strEncrypt">
    /// <returns>
    private string Decrypt(string strText, string strEncrypt)
    {
    	byte[] bKey = new byte[20];
    	byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
    
    	try
    	{
    		bKey = System.Text.Encoding.UTF8.GetBytes(strEncrypt.Substring(0, 8));
    		DESCryptoServiceProvider des = new DESCryptoServiceProvider();
    		Byte[] inputByteArray = inputByteArray = Convert.FromBase64String(strText);
    		MemoryStream ms = new MemoryStream();
    		CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(bKey, 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)
    	{
    		throw ex;
    	}
    
    }
     

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