C#字符串加密解密方法實例

2020-01-24 02:08:18

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本文實例講述了C#字符串加密解密方法。分享給大家供大家參考。具體如下：

#region 加密解密
static string encryptKey= "Oyea";

#region 加密字符串 public static string Encrypt(string str)

/// <summary>
/// 加密字符串
/// </summary>
/// <param name="str">要加密的字符串</param>
/// <returns>返回加密后的字符串</returns>
public static string Encrypt(string str)
{
    DESCryptoServiceProvider descsp = new DESCryptoServiceProvider(); //實例化加/解密類對象
    byte[] key = Encoding.Unicode.GetBytes(encryptKey); //定義字節數組，用來存儲密鑰
    byte[] data = Encoding.Unicode.GetBytes(str);//定義字節數組，用來存儲要加密的字符串
    MemoryStream MStream = new MemoryStream();//實例化內存流對象
    //使用內存流實例化加密流對象
    CryptoStream CStream = new CryptoStream(MStream,descsp.CreateEncryptor(key, key), CryptoStreamMode.Write);
    CStream.Write(data,0, data.Length); //向加密流中寫入數據
    CStream.FlushFinalBlock();             //釋放加密流
    return Convert.ToBase64String(MStream.ToArray());//返回加密后的字符串
}
#endregion

#region 解密字符串 public static string Decrypt(string str)

/// <summary>
/// 解密字符串
/// </summary>
/// <param name="str">要解密的字符串</param>
/// <returns>返回解密后的字符串</returns>
public static string Decrypt(string str)
{
    DESCryptoServiceProvider descsp = new DESCryptoServiceProvider(); //實例化加/解密類對象
    byte[] key = Encoding.Unicode.GetBytes(encryptKey); //定義字節數組，用來存儲密鑰
    byte[] data = Convert.FromBase64String(str);//定義字節數組，用來存儲要解密的字符串
    MemoryStream MStream = new MemoryStream();//實例化內存流對象
    //使用內存流實例化解密流對象
    CryptoStream CStream = new CryptoStream(MStream, descsp.CreateDecryptor(key, key), CryptoStreamMode.Write);
    CStream.Write(data,0, data.Length);      //向解密流中寫入數據
    CStream.FlushFinalBlock();              //釋放解密流
    return Encoding.Unicode.GetString(MStream.ToArray());      //返回解密后的字符串
}
#endregion
#endregion