using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Security.Cryptography; using System.Text; namespace ZB.QueueSys.Common { public sealed class EncryptUtils { #region Base64加密解密 /// <summary> /// Base64加密 /// </summary> /// <param name="input">需要加密的字符串</param> /// <returns></returns> public static string Base64Encrypt(string input) { return Base64Encrypt(input, new UTF8Encoding()); } /// <summary> /// Base64加密 /// </summary> /// <param name="input">需要加密的字符串</param> /// <param name="encode">字符编码</param> /// <returns></returns> public static string Base64Encrypt(string input, Encoding encode) { return Convert.ToBase64String(encode.GetBytes(input)); } /// <summary> /// Base64解密 /// </summary> /// <param name="input">需要解密的字符串</param> /// <returns></returns> public static string Base64Decrypt(string input) { return Base64Decrypt(input, new UTF8Encoding()); } /// <summary> /// Base64解密 /// </summary> /// <param name="input">需要解密的字符串</param> /// <param name="encode">字符的编码</param> /// <returns></returns> public static string Base64Decrypt(string input, Encoding encode) { return encode.GetString(Convert.FromBase64String(input)); } #endregion #region DES加密解密 /// <summary> /// DES加密 /// </summary> /// <param name="data">加密数据</param> /// <param name="key">8位字符的密钥字符串</param> /// <param name="iv">8位字符的初始化向量字符串</param> /// <returns></returns> public static string DESEncrypt(string data, string key, string iv) { byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(key); byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(iv); DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); int i = cryptoProvider.KeySize; MemoryStream ms = new MemoryStream(); CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write); StreamWriter sw = new StreamWriter(cst); sw.Write(data); sw.Flush(); cst.FlushFinalBlock(); sw.Flush(); return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length); } /// <summary> /// DES解密 /// </summary> /// <param name="data">解密数据</param> /// <param name="key">8位字符的密钥字符串(需要和加密时相同)</param> /// <param name="iv">8位字符的初始化向量字符串(需要和加密时相同)</param> /// <returns></returns> public static string DESDecrypt(string data, string key, string iv) { byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(key); byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(iv); byte[] byEnc; try { byEnc = Convert.FromBase64String(data); } catch { return null; } DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); MemoryStream ms = new MemoryStream(byEnc); CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read); StreamReader sr = new StreamReader(cst); return sr.ReadToEnd(); } #endregion #region MD5加密 /// <summary> /// MD5加密 /// </summary> /// <param name="input">需要加密的字符串</param> /// <returns></returns> public static string MD5Encrypt(string input) { return MD5Encrypt(input, new UTF8Encoding()); } /// <summary> /// MD5加密 /// </summary> /// <param name="input">需要加密的字符串</param> /// <param name="encode">字符的编码</param> /// <returns></returns> public static string MD5Encrypt(string input, Encoding encode) { MD5 md5 = new MD5CryptoServiceProvider(); byte[] t = md5.ComputeHash(encode.GetBytes(input)); StringBuilder sb = new StringBuilder(32); for (int i = 0; i < t.Length; i++) sb.Append(t[i].ToString("x").PadLeft(2, '0')); return sb.ToString(); } /// <summary> /// MD5对文件流加密 /// </summary> /// <param name="sr"></param> /// <returns></returns> public static string MD5Encrypt(Stream stream) { MD5 md5serv = MD5CryptoServiceProvider.Create(); byte[] buffer = md5serv.ComputeHash(stream); StringBuilder sb = new StringBuilder(); foreach (byte var in buffer) sb.Append(var.ToString("x2")); return sb.ToString(); } /// <summary> /// MD5加密(返回16位加密串) /// </summary> /// <param name="input"></param> /// <param name="encode"></param> /// <returns></returns> public static string MD5Encrypt16(string input, Encoding encode) { MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider(); string result = BitConverter.ToString(md5.ComputeHash(encode.GetBytes(input)), 4, 8); result = result.Replace("-", ""); return result; } #endregion #region 3DES 加密解密 public static string DES3Encrypt(string data, string key) { TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider(); DES.Key = ASCIIEncoding.ASCII.GetBytes(key); DES.Mode = CipherMode.CBC; DES.Padding = PaddingMode.PKCS7; ICryptoTransform DESEncrypt = DES.CreateEncryptor(); byte[] Buffer = ASCIIEncoding.ASCII.GetBytes(data); return Convert.ToBase64String(DESEncrypt.TransformFinalBlock(Buffer, 0, Buffer.Length)); } public static string DES3Decrypt(string data, string key) { TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider(); DES.Key = ASCIIEncoding.ASCII.GetBytes(key); DES.Mode = CipherMode.CBC; DES.Padding = System.Security.Cryptography.PaddingMode.PKCS7; ICryptoTransform DESDecrypt = DES.CreateDecryptor(); string result = ""; try { byte[] Buffer = Convert.FromBase64String(data); result = ASCIIEncoding.ASCII.GetString(DESDecrypt.TransformFinalBlock(Buffer, 0, Buffer.Length)); } catch (Exception e) { } return result; } #endregion #region DESEnCode DES加密-解密 #region DESEnCode DES加密 public static string DESEnCode(string pToEncrypt, string sKey) { // string pToEncrypt1 = HttpContext.Current.Server.UrlEncode(pToEncrypt); DESCryptoServiceProvider des = new DESCryptoServiceProvider(); byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(pToEncrypt); //建立加密对象的密钥和偏移量 //原文使用ASCIIEncoding.ASCII方法的GetBytes方法 //使得输入密码必须输入英文文本 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(); StringBuilder ret = new StringBuilder(); foreach (byte b in ms.ToArray()) { ret.AppendFormat("{0:X2}", b); } ret.ToString(); return ret.ToString(); } #endregion #region DESDeCode DES解密 public static string DESDeCode(string pToDecrypt, string sKey) { 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); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); StringBuilder ret = new StringBuilder(); return System.Text.Encoding.Default.GetString(ms.ToArray()); } #endregion #endregion } }
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