The C# class is as follows:
using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;
using System.IO;
namespace ConsoleApplication1
{
/// <summary>
/// Encryption class
/// </summary>
public class EncryptHelper
{
// structure 1 Symmetric algorithm
private SymmetricAlgorithm mCSP = new TripleDESCryptoServiceProvider();
#region Encryption and decryption function
/// <summary>
/// Encryption of strings
/// </summary>
/// <param name="Value"> The string to encrypt </param>
/// <param name="sKey"> Key, must be 32 position </param>
/// <param name="sIV"> Must be a vector 12 A character </param>
/// <returns> An encrypted string </returns>
public string EncryptString(string Value, string sKey,string sIV)
{
try
{
ICryptoTransform ct;
MemoryStream ms;
CryptoStream cs;
byte[] byt;
mCSP.Key = Convert.FromBase64String(sKey);
mCSP.IV = Convert.FromBase64String(sIV);
// Specifies the operation mode for encryption
mCSP.Mode = System.Security.Cryptography.CipherMode.ECB;
// Gets or sets the population mode of the encryption algorithm
mCSP.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
ct = mCSP.CreateEncryptor(mCSP.Key, mCSP.IV);// Creating an encrypted object
byt = Encoding.UTF8.GetBytes(Value);
ms = new MemoryStream();
cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);
cs.Write(byt, 0, byt.Length);
cs.FlushFinalBlock();
cs.Close();
return Convert.ToBase64String(ms.ToArray());
}
catch (Exception ex)
{
//MessageBox.Show(ex.Message, " abnormal ", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return ("Error in Encrypting " + ex.Message);
}
}
/// <summary>
/// Decrypt string
/// </summary>
/// <param name="Value"> An encrypted string </param>
/// <param name="sKey"> Key, must be 32 position </param>
/// <param name="sIV"> Must be a vector 12 A character </param>
/// <returns> The decrypted string </returns>
public string DecryptString(string Value, string sKey, string sIV)
{
try
{
ICryptoTransform ct;// Encryption conversion operation
MemoryStream ms;// The memory stream
CryptoStream cs;// The data stream is connected to the data encryption conversion stream
byte[] byt;
// will 3DES The key is converted to byte
mCSP.Key = Convert.FromBase64String(sKey);
// will 3DES I'm going to convert the vector theta to theta byte
mCSP.IV = Convert.FromBase64String(sIV);
mCSP.Mode = System.Security.Cryptography.CipherMode.ECB;
mCSP.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
ct = mCSP.CreateDecryptor(mCSP.Key, mCSP.IV);// Create a symmetric decryption object
byt = Convert.FromBase64String(Value);
ms = new MemoryStream();
cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);
cs.Write(byt, 0, byt.Length);
cs.FlushFinalBlock();
cs.Close();
return Encoding.UTF8.GetString(ms.ToArray());
}
catch (Exception ex)
{
//MessageBox.Show(ex.Message, " abnormal ", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return ("Error in Decrypting " + ex.Message);
}
}
#endregion
}
}The method is as follows:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
EncryptHelper helper = new EncryptHelper();
// encryption
string oldValue = "13800138000";
// Encrypted result
// The key , Must be 32 position
string sKey = "qJzGEh6hESZDVJeCnFPGuxzaiB7NLQM5";
// Must be a vector 12 A character
string sIV = "andyliu1234=";
//print
string newValue = helper.EncryptString(oldValue,sKey,sIV);
Console.WriteLine(" encrypted :"+ newValue);
// decryption
string desValue = helper.DecryptString(newValue,sKey,sIV);
//
Console.WriteLine(" decrypted :"+ desValue);
Console.ReadLine();
}
}
}