Lập Trình .NET

public byte[] Encrypt(byte[] dataToEncrypt, byte[] key, byte[] iv)
{            
    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.CreateEncryptor(), 
                CryptoStreamMode.Write);

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

            return memoryStream.ToArray();
        }
    }
}

public byte[] Decrypt(byte[] dataToDecrypt, byte[] key, byte[] iv)
{                                
    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(dataToDecrypt, 0, dataToDecrypt.Length);
            cryptoStream.FlushFinalBlock();

            return memoryStream.ToArray();
        }
    }                            
}

public byte[] Encrypt(byte[] dataToEncrypt, byte[] key, byte[] iv)
{            
    using (var des = new TripleDESCryptoServiceProvider())
    {
        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.CreateEncryptor(), 
                CryptoStreamMode.Write);

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

            return memoryStream.ToArray();
        }
    }
}

public byte[] Decrypt(byte[] dataToDecrypt, byte[] key, byte[] iv)
{
    using (var des = new TripleDESCryptoServiceProvider())
    {
        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(dataToDecrypt, 0, dataToDecrypt.Length);
            cryptoStream.FlushFinalBlock();

            var decryptBytes = memoryStream.ToArray();

            return decryptBytes;
        }
    }                            
}

public byte[] Encrypt(byte[] dataToEncrypt, byte[] key, byte[] iv)
{            
    using (var aes = new AesCryptoServiceProvider())
    {
        aes.Mode = CipherMode.CBC;
        aes.Padding = PaddingMode.PKCS7;
        
        aes.Key = key;
        aes.IV = iv;

        using (var memoryStream = new MemoryStream())
        {
            var cryptoStream = new CryptoStream(memoryStream, aes.CreateEncryptor(), 
                CryptoStreamMode.Write);

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

            return memoryStream.ToArray();
        }
    }
}

public byte[] Decrypt(byte[] dataToDecrypt, byte[] key, byte[] iv)
{                                
    using (var aes = new AesCryptoServiceProvider())
    {
        aes.Mode = CipherMode.CBC;
        aes.Padding = PaddingMode.PKCS7;

        aes.Key = key;
        aes.IV = iv;

        using (var memoryStream = new MemoryStream())
        {                       
            var cryptoStream = new CryptoStream(memoryStream, aes.CreateDecryptor(), 
                CryptoStreamMode.Write);

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

            var decryptBytes = memoryStream.ToArray();

            return decryptBytes;
        }
    }                            
}