C# DES加密、解密
/// <summary> /// DES加密字符串 /// </summary> /// <param name="pToEncrypt">待加密的字符串</param> /// <param name="sKey">加密密钥,要求为8位</param> /// <returns>加密成功返回加密后的字符串,失败返回源串</returns> public static string DesEncrypt(string pToEncrypt, string sKey) { StringBuilder ret = new StringBuilder(); try { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt); des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(),CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); foreach (byte b in ms.ToArray()) { ret.AppendFormat("{0:X2}", b); } return ret.ToString(); } catch { return pToEncrypt; } }
/// <summary> /// DES解密字符串 /// </summary> /// <param name="pToDecrypt">待解密的字符串</param> /// <param name="sKey">解密密钥,要求为8位,和加密密钥相同</param> /// <returns>解密成功返回解密后的字符串,失败返源串</returns> public static string DesDecrypt(string pToDecrypt, string sKey) { MemoryStream ms = new MemoryStream(); try { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); byte[] inputByteArray = new byte[pToDecrypt.Length / 2]; for (int x = 0; x < pToDecrypt.Length / 2; x++) { int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16)); inputByteArray[x] = (byte)i; } des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); return System.Text.Encoding.Default.GetString(ms.ToArray()); } catch { return pToDecrypt; } }
本文作者:焱的博客
本文链接:https://www.cnblogs.com/flamegreat/p/12195795.html
版权声明:本作品采用知识共享署名-非商业性使用-禁止演绎 2.5 中国大陆许可协议进行许可。
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