C# DES加密解密类分享

最新推荐文章于 2022-07-12 15:07:31 发布

转载最新推荐文章于 2022-07-12 15:07:31 发布 · 67 阅读

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原文链接：http://www.cnblogs.com/andrew-blog/archive/2012/03/16/DESEncrypt.html

本文提供了一种使用DES算法进行字符串加密和解密的方法。通过简单的C#代码示例，展示了如何利用.NET Framework中的安全组件实现数据保护。包括密钥初始化、加密过程及解密流程。

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直接上代码了。

    public class DESEncrypt
    {
        //密钥
        private static string key = "mykey";

        /// <summary>
        /// DES加密
        /// </summary>
        /// <param name="encryptString">需要加密的字符串</param>
        /// <returns>返回已加密的字符串</returns>
        public static string DesEncrypt(string encryptString)
        {
            if (string.IsNullOrEmpty(encryptString))
            {
                return string.Empty;
            }
            byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 8));
            byte[] keyIV = keyBytes;
            byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
            MemoryStream mStream = new MemoryStream();
            CryptoStream cStream = new CryptoStream(mStream, provider.CreateEncryptor(keyBytes, keyIV), CryptoStreamMode.Write);
            cStream.Write(inputByteArray, 0, inputByteArray.Length);
            cStream.FlushFinalBlock();
            return Convert.ToBase64String(mStream.ToArray());
        }
        /// <summary>
        /// DES解密
        /// </summary>
        /// <param name="decryptString">需要解密的字符串</param>
        /// <returns>已解密的字符串</returns>
        public static string DesDecrypt(string decryptString)
        {
            if (string.IsNullOrEmpty(decryptString))
            {
                return string.Empty ;
            }
            byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 8));
            byte[] keyIV = keyBytes;
            byte[] inputByteArray = Convert.FromBase64String(decryptString);
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
            MemoryStream mStream = new MemoryStream();
            CryptoStream cStream = new CryptoStream(mStream, provider.CreateDecryptor(keyBytes, keyIV), CryptoStreamMode.Write);
            cStream.Write(inputByteArray, 0, inputByteArray.Length);
            cStream.FlushFinalBlock();
            return Encoding.UTF8.GetString(mStream.ToArray());
        }
    }

注：

//密钥
private static string key = "mykey";

mykey 是设定的密钥，自行设置一个就可以了。

参考：http://www.wxzzz.com/?id=86

转载于:https://www.cnblogs.com/andrew-blog/archive/2012/03/16/DESEncrypt.html