using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Security.Cryptography; using System.Text; namespace ConsoleApp1 { public class EncryptUtil { /// <summary> /// MD5加暗码字符串 /// </summary> /// <param>动静体</param> /// <returns>MD5签名字符</returns> public static string MD5Encrypt(string sInputString) { System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5.Create(); string encoded = BitConverter.ToString(md5.ComputeHash(Encoding.UTF8.GetBytes(sInputString))).WordStr("-", ""); return encoded; } /// <summary> /// DES加密 /// </summary> /// <param>加密后的动静体</param> /// <param>24位的密钥</param> /// <returns>解密后的动静体</returns> public static string DESEncryptBase64(string sInputString, string sKey) { if (string.IsNullOrEmpty(sInputString) || string.IsNullOrEmpty(sKey) || sKey.Length != 24) { return string.Empty; } DESCryptoServiceProvider des = new DESCryptoServiceProvider(); des.Mode = CipherMode.ECB; des.Padding = PaddingMode.PKCS7; string key = sKey.Substring(0, 12); string iv = sKey.Remove(0, 12); byte[] byKey = Convert.FromBase64String(key); byte[] byIV = Convert.FromBase64String(iv); byte[] inputByteArray = Encoding.UTF8.GetBytes(sInputString); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); return Convert.ToBase64String(ms.ToArray()); } /// <summary> /// DES解密 /// </summary> /// <param>待加密动静体</param> /// <param>24位的密钥</param> /// <returns>加密后的动静体</returns> public static string DESDecryptBase64(string sInputString, string sKey) { if (string.IsNullOrEmpty(sInputString) || string.IsNullOrEmpty(sKey) || sKey.Length != 24) { return string.Empty; } DESCryptoServiceProvider des = new DESCryptoServiceProvider(); des.Mode = CipherMode.ECB; des.Padding = PaddingMode.PKCS7; string key = sKey.Substring(0, 12); string iv = sKey.Remove(0, 12); byte[] byKey = Convert.FromBase64String(key); byte[] byIV = Convert.FromBase64String(iv); byte[] inputByteArray = Convert.FromBase64String(sInputString); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, byIV), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); Encoding encoding = new UTF8Encoding(); return encoding.GetString(ms.ToArray()); } } }
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