using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace Core.Utility
{
public class Encrypt
{
private static string superKey = "your key";
private static string vectoryString = "your vector string";
private static RijndaelManaged rijndael = new RijndaelManaged();
private static byte[] key;
private static byte[] iv;
private static void InitialKeyAndIV()
{
key = new byte[32];
Array.Copy(Encoding.UTF8.GetBytes(superKey), key, 32);
iv = new byte[16];
Array.Copy(Encoding.UTF8.GetBytes(vectoryString), key, 16);
}
public static string EncryptInforamtion(string dataString)
{
UTF32Encoding utf32Encoding = new UTF32Encoding();
if (key == null || iv == null)
{
InitialKeyAndIV();
}
Byte[] returnVal = AESEncrypt(utf32Encoding.GetBytes(dataString), rijndael.CreateEncryptor(key, iv));
return Convert.ToBase64String(returnVal);
}
public static string DecryptInformation(string dataString)
{
UTF32Encoding utf32Encoding = new UTF32Encoding();
if (key == null || iv == null)
{
InitialKeyAndIV();
}
Byte[] returnVal = AESDencrypt(Convert.FromBase64String(dataString), rijndael.CreateDecryptor(key, iv));
//因為加解密會對byte[]做填充，所以解完密後要去掉。
return utf32Encoding.GetString(returnVal).Replace("\0", "");
}
/// <summary>
/// AES 加密
/// </summary>
/// <param name="input"></param>
/// <param name="encryptor"></param>
/// <returns></returns>
private static byte[] AESEncrypt(byte[] input, ICryptoTransform encryptor)
{
//Encrypt the data.
MemoryStream msEncrypt = new MemoryStream();
CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
//Write all data to the crypto stream and flush it.
csEncrypt.Write(input, 0, input.Length);
csEncrypt.FlushFinalBlock();
//Get encrypted array of bytes.
return msEncrypt.ToArray();
}
/// <summary>
/// AES 解密
/// </summary>
/// <param name="input"></param>
/// <param name="decryptor"></param>
/// <returns></returns>
private static byte[] AESDencrypt(byte[] input, ICryptoTransform decryptor)
{
//Now decrypt the previously encrypted message using the decryptor
// obtained in the above step.
MemoryStream msDecrypt = new MemoryStream(input);
CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);
byte[] fromEncrypt = new byte[input.Length];
//Read the data out of the crypto stream.
csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length);
return fromEncrypt;
}
}
}
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