DotNet中用到的加密算法总结_ASP.NET技巧

232 1,2,3,4,5,6,

233 1,2,3,4,5,6

234 };

235 byte[] IV = new byte[8]{1,2,3,4,5,6,1,2};

236

237 ct = des.CreateDecryptor(Key, IV);

238 //byt = Convert.FromBase64String(input); // 将 密文 以 HEX to byte[]编码转换成 byte 数组

239 if(input.Length<=1)

240 {

241 throw new Exception("encrypted HEX string is too short!");

242 }

243 byte[] byt = new byte[input.Length/2];

244 for(int i=0;i<byt.Length;i++)

245 {

246 //Console.WriteLine(input.Substring(i*2,2));

247 byt[i] = Convert.ToByte(input.Substring(i*2,2),16);

248 }

249

250 ms = new MemoryStream();

251 cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);

252 cs.Write(byt, 0, byt.Length);

253 cs.FlushFinalBlock();

254

255 cs.Close();

256

257 return Encoding.GetEncoding("GB2312").GetString(ms.ToArray()); // 将 明文 以 GB2312 编码转换成字符串

258 }

259 /**//// <summary>

260 /// Base64解码

261 /// </summary>

262 /// <param name="base64Str"></param>

263 /// <returns></returns>

264 public static string DecodingFromBase64(string base64Str)

265 {

266 Byte[] bytes = Convert.FromBase64String(base64Str);

267 return System.Text.Encoding.UTF8.GetString(bytes);

268 }

269 /**//// <summary>

270 /// Base64编码

271 /// </summary>

272 /// <param name="str"></param>