using System;using System.IO;using System.Security.Cryptography;using System.Text;public class CCryptoHandle { //=============================== 构造函数 =============================== #region 对称加密类的构造函数 /// /// 对称加密类的构造函数 /// /// 密钥 public CCryptoHandle(string key) { myRijndael = new RijndaelManaged(); Key = key; IV = "12^%*(&(_)*&7!rNIfb&95GUYEDF4ghUb#er57HBh(u%g6HJ($GE3r7&!hg4ui%$hV$"; } #endregion #region 对称加密类的构造函数 /// /// 对称加密类的构造函数 /// /// 密钥 /// 初始向量IV public CCryptoHandle(string key, string iv) { myRijndael = new RijndaelManaged(); Key = key; IV = iv; } #endregion //=============================== 私有变量 =============================== #region 私有变量 private RijndaelManaged myRijndael; /// /// 密钥 /// public string Key; /// /// 初始向量IV /// public string IV; #endregion //=============================== 共有方法 =============================== #region 获得密钥 /// /// 获得密钥 /// /// 密钥 private byte[] GetLegalKey() { string sTemp = Key; myRijndael.GenerateKey(); byte[] bytTemp = myRijndael.Key; int KeyLength = bytTemp.Length; if (sTemp.Length > KeyLength) sTemp = sTemp.Substring(0, KeyLength); else if (sTemp.Length < KeyLength) sTemp = sTemp.PadRight(KeyLength, ' '); return ASCIIEncoding.ASCII.GetBytes(sTemp); } #endregion #region 获得初始向量IV /// /// 获得初始向量IV /// /// 初试向量IV private byte[] GetLegalIV() { string sTemp = IV; myRijndael.GenerateIV(); byte[] bytTemp = myRijndael.IV; int IVLength = bytTemp.Length; if (sTemp.Length > IVLength) sTemp = sTemp.Substring(0, IVLength); else if (sTemp.Length < IVLength) sTemp = sTemp.PadRight(IVLength, ' '); return ASCIIEncoding.ASCII.GetBytes(sTemp); } #endregion #region 加密方法 /// /// 加密方法 /// /// 待加密的串 /// 经过加密的串 public string Encrypt(string Source) { try { byte[] bytIn = UTF8Encoding.UTF8.GetBytes(Source); MemoryStream ms = new MemoryStream(); myRijndael.Key = GetLegalKey(); myRijndael.IV = GetLegalIV(); ICryptoTransform encrypto = myRijndael.CreateEncryptor(); CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write); cs.Write(bytIn, 0, bytIn.Length); cs.FlushFinalBlock(); ms.Close(); byte[] bytOut = ms.ToArray(); return Convert.ToBase64String(bytOut); } catch (Exception ex) { throw new Exception("在文件加密的时候出现错误！错误提示： \n" + ex.Message); } } #endregion #region 解密方法 /// /// 解密方法 /// /// 待解密的串 /// 经过解密的串 public string Decrypt(string Source) { try { byte[] bytIn = Convert.FromBase64String(Source); MemoryStream ms = new MemoryStream(bytIn, 0, bytIn.Length); myRijndael.Key = GetLegalKey(); myRijndael.IV = GetLegalIV(); ICryptoTransform encrypto = myRijndael.CreateDecryptor(); CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read); StreamReader sr = new StreamReader(cs); return sr.ReadToEnd(); } catch (Exception ex) { throw new Exception("在文件解密的时候出现错误！错误提示： \n" + ex.Message); } } #endregion #region 加密方法byte[] to byte[] /// /// 加密方法byte[] to byte[] /// /// 待加密的byte数组 /// 经过加密的byte数组 public byte[] Encrypt(byte[] Source) { try { byte[] bytIn = Source; MemoryStream ms = new MemoryStream(); myRijndael.Key = GetLegalKey(); myRijndael.IV = GetLegalIV(); ICryptoTransform encrypto = myRijndael.CreateEncryptor(); CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write); cs.Write(bytIn, 0, bytIn.Length); cs.FlushFinalBlock(); ms.Close(); byte[] bytOut = ms.ToArray(); return bytOut; } catch (Exception ex) { throw new Exception("在文件加密的时候出现错误！错误提示： \n" + ex.Message); } } #endregion #region 解密方法byte[] to byte[] /// /// 解密方法byte[] to byte[] /// /// 待解密的byte数组 /// 经过解密的byte数组 public byte[] Decrypt(byte[] Source) { try { byte[] bytIn = Source; MemoryStream ms = new MemoryStream(bytIn, 0, bytIn.Length); myRijndael.Key = GetLegalKey(); myRijndael.IV = GetLegalIV(); ICryptoTransform encrypto = myRijndael.CreateDecryptor(); CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read); StreamReader sr = new StreamReader(cs); return UTF8Encoding.UTF8.GetBytes(sr.ReadToEnd()); } catch (Exception ex) { throw new Exception("在文件解密的时候出现错误！错误提示： \n" + ex.Message); } } #endregion #region 加密方法File to File /// /// 加密方法File to File /// /// 待加密文件的路径 /// 待加密后文件的输出路径 public void Encrypt(string inFileName, string outFileName) { try { //byte[] bytIn = UTF8Encoding.UTF8.GetBytes(Source); //MemoryStream ms = new MemoryStream(); FileStream fin = new FileStream(inFileName, FileMode.Open, FileAccess.Read); FileStream fout = new FileStream(outFileName, FileMode.OpenOrCreate, FileAccess.Write); fout.SetLength(0); myRijndael.Key = GetLegalKey(); myRijndael.IV = GetLegalIV(); byte[] bin = new byte[100]; long rdlen = 0; long totlen = fin.Length; int len; ICryptoTransform encrypto = myRijndael.CreateEncryptor(); CryptoStream cs = new CryptoStream(fout, encrypto, CryptoStreamMode.Write); while (rdlen < totlen) { len = fin.Read(bin, 0, 100); cs.Write(bin, 0, len); rdlen = rdlen + len; } cs.Close(); fout.Close(); fin.Close(); } catch (Exception ex) { throw new Exception("在文件加密的时候出现错误！错误提示： \n" + ex.Message); } } #endregion #region 解密方法File to File /// /// 解密方法File to File /// /// 待解密文件的路径 /// 待解密后文件的输出路径 public void Decrypt(string inFileName, string outFileName) { try { FileStream fin = new FileStream(inFileName, FileMode.Open, FileAccess.Read); FileStream fout = new FileStream(outFileName, FileMode.OpenOrCreate, FileAccess.Write); fout.SetLength(0); byte[] bin = new byte[100]; long rdlen = 0; long totlen = fin.Length; int len; myRijndael.Key = GetLegalKey(); myRijndael.IV = GetLegalIV(); ICryptoTransform encrypto = myRijndael.CreateDecryptor(); CryptoStream cs = new CryptoStream(fout, encrypto, CryptoStreamMode.Write); while (rdlen < totlen) { len = fin.Read(bin, 0, 100); cs.Write(bin, 0, len); rdlen = rdlen + len; } cs.Close(); fout.Close(); fin.Close(); } catch (Exception ex) { throw new Exception("在文件解密的时候出现错误！错误提示： \n" + ex.Message); } } #endregion }