C# 加密解密-详细内容 - 黄兵的个人博客

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2017/9/1 9:49:34,作者: 黄兵

C# 加密解密

///
/// 加密
///
///
///
///
private String Encrypt(String strText, String strEncrKey)
{
    Byte[] byKey = { };
    Byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
    try
    {
        byKey = System.Text.Encoding.UTF8.GetBytes(strEncrKey.Substring(0, 8));
        DESCryptoServiceProvider des = new DESCryptoServiceProvider();
        Byte[] inputByteArray = Encoding.UTF8.GetBytes(strText);
        MemoryStream ms = new MemoryStream();
        CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);
        cs.Write(inputByteArray, 0, inputByteArray.Length);
        cs.FlushFinalBlock();
        return Convert.ToBase64String(ms.ToArray());
    }
    catch (Exception ex)
    {
        return ex.Message;
    }
}
/// /// 对数据进行加密。 ///     
/// /// 传入加密的数据          
///   /// 返回加密后的字字符串    ///      
public string EncryptText(String strText)
{
    return Encrypt(strText, "&%#@?,:*_");
}
///
/// 解密
///
///
///
///
private String Decrypt(String strText, String sDecrKey)
{
    Byte[] byKey = { };
    Byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
    Byte[] inputByteArray = new byte[strText.Length];
    try
    {
        byKey = System.Text.Encoding.UTF8.GetBytes(sDecrKey.Substring(0, 8));
        DESCryptoServiceProvider des = new DESCryptoServiceProvider();
        inputByteArray = Convert.FromBase64String(strText);
        MemoryStream ms = new MemoryStream();
        CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, 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)
    {
        return ex.Message;
    }
}