C#实现简单的字符串加密 C#实现简单的字符串加密

最近用到一些字符串加密，而.net中提供的加密算法中用起来比较复杂，便简单的封装了一下，方便日后使用。

public class Encrypt{static Encoding encoding = Encoding.UTF8; public static string EncryptDES(string encryptString, string key){var input = encoding.GetBytes(encryptString); var ouptputData = https://www.it610.com/article/ProcessDES(input, key, true); var outputStr = Convert.ToBase64String(ouptputData); //base64编码中有不能作为文件名的'/'符号，这里把它替换一下，增强适用范围return outputStr.Replace('/', '@'); }public static string DecryptDES(string decryptString, string key){decryptString = decryptString.Replace('@', '/'); var input = Convert.FromBase64String(decryptString); var data = https://www.it610.com/article/ProcessDES(input, key, false); return encoding.GetString(data); }private static byte[] ProcessDES(byte[] data, string key, bool isEncrypt){using (var dCSP = new DESCryptoServiceProvider()){var keyData = Md5(key); var rgbKey = new ArraySegment(keyData, 0, 8).ToArray(); var rgbIV = new ArraySegment(keyData, 8, 8).ToArray(); var dCSPKey = isEncrypt ? dCSP.CreateEncryptor(rgbKey, rgbIV) : dCSP.CreateDecryptor(rgbKey, rgbIV); using (var memory = new MemoryStream())using (var cStream = new CryptoStream(memory, dCSPKey, CryptoStreamMode.Write)){cStream.Write(data, 0, data.Length); cStream.FlushFinalBlock(); return memory.ToArray(); }}}public static byte[] Md5(string str){using (var md5 = MD5.Create()){return md5.ComputeHash(Encoding.UTF8.GetBytes(str)); }}}

这个封装支持MD5和DES加密（有空再把RSA给补上），用于字符串加密，主要考虑的是方便使用，并没有追求最优效率。为方便使用做了如下两点优化：