using System;
using System.Collections.Generic;using System.Linq;using System.Web;using System.IO;using System.Security.Cryptography;using System.Text;using System.Web.Security;/// <summary>
///SDKSecurity 的摘要说明///Edit by JaymeZhang/// </summary>public class SDKSecurity{ public SDKSecurity() { // //TODO: 在此处添加构造函数逻辑 // } #region MD5 加密 /// <summary> /// MD5 加密静态方法 /// </summary> /// <param name="EncryptString">待加密的密文</param> /// <returns>returns</returns> public static string MD5Encrypt(string EncryptString) { if (string.IsNullOrEmpty(EncryptString)) { throw (new Exception("密文不得为空")); } MD5 m_ClassMD5 = new MD5CryptoServiceProvider(); string m_strEncrypt = ""; try { m_strEncrypt = BitConverter.ToString(m_ClassMD5.ComputeHash(Encoding.Default.GetBytes(EncryptString))).Replace("-", ""); } catch (ArgumentException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_ClassMD5.Clear(); } return m_strEncrypt; } #endregion#region DES 加密解密
/// <summary> /// DES 加密(数据加密标准,速度较快,适用于加密大量数据的场合) /// </summary> /// <param name="EncryptString">待加密的密文</param> /// <param name="EncryptKey">加密的密钥</param> /// <returns>returns</returns> public static string DESEncrypt(string EncryptString, string EncryptKey) { if (string.IsNullOrEmpty(EncryptString)) { throw (new Exception("密文不得为空")); } if (string.IsNullOrEmpty(EncryptKey)) { throw (new Exception("密钥不得为空")); } if (EncryptKey.Length != 8) { throw (new Exception("密钥必须为8位")); } byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; string m_strEncrypt = ""; DESCryptoServiceProvider m_DESProvider = new DESCryptoServiceProvider(); try { byte[] m_btEncryptString = Encoding.Default.GetBytes(EncryptString); MemoryStream m_stream = new MemoryStream(); CryptoStream m_cstream = new CryptoStream(m_stream, m_DESProvider.CreateEncryptor(Encoding.Default.GetBytes(EncryptKey), m_btIV), CryptoStreamMode.Write); m_cstream.Write(m_btEncryptString, 0, m_btEncryptString.Length); m_cstream.FlushFinalBlock(); m_strEncrypt = Convert.ToBase64String(m_stream.ToArray()); m_stream.Close(); m_stream.Dispose(); m_cstream.Close(); m_cstream.Dispose(); } catch (IOException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (ArgumentException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_DESProvider.Clear(); }return m_strEncrypt;
} /// <summary> /// DES 解密(数据加密标准,速度较快,适用于加密大量数据的场合) /// </summary> /// <param name="DecryptString">待解密的密文</param> /// <param name="DecryptKey">解密的密钥</param> /// <returns>returns</returns> public static string DESDecrypt(string DecryptString, string DecryptKey) { if (string.IsNullOrEmpty(DecryptString)) { throw (new Exception("密文不得为空")); } if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密钥不得为空")); } if (DecryptKey.Length != 8) { throw (new Exception("密钥必须为8位")); } byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; string m_strDecrypt = ""; DESCryptoServiceProvider m_DESProvider = new DESCryptoServiceProvider(); try { byte[] m_btDecryptString = Convert.FromBase64String(DecryptString); MemoryStream m_stream = new MemoryStream(); CryptoStream m_cstream = new CryptoStream(m_stream, m_DESProvider.CreateDecryptor(Encoding.Default.GetBytes(DecryptKey), m_btIV), CryptoStreamMode.Write); m_cstream.Write(m_btDecryptString, 0, m_btDecryptString.Length); m_cstream.FlushFinalBlock(); m_strDecrypt = Encoding.Default.GetString(m_stream.ToArray()); m_stream.Close(); m_stream.Dispose(); m_cstream.Close(); m_cstream.Dispose(); } catch (IOException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (ArgumentException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_DESProvider.Clear(); }return m_strDecrypt;
} #endregion#region RC2 加密解密
/// <summary> /// RC2 加密(用变长密钥对大量数据进行加密) /// </summary> /// <param name="EncryptString">待加密密文</param> /// <param name="EncryptKey">加密密钥</param> /// <returns>returns</returns> public static string RC2Encrypt(string EncryptString, string EncryptKey) { if (string.IsNullOrEmpty(EncryptString)) { throw (new Exception("密文不得为空")); } if (string.IsNullOrEmpty(EncryptKey)) { throw (new Exception("密钥不得为空")); } if (EncryptKey.Length < 5 || EncryptKey.Length > 16) { throw (new Exception("密钥必须为5-16位")); } string m_strEncrypt = ""; byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; RC2CryptoServiceProvider m_RC2Provider = new RC2CryptoServiceProvider(); try { byte[] m_btEncryptString = Encoding.Default.GetBytes(EncryptString); MemoryStream m_stream = new MemoryStream(); CryptoStream m_cstream = new CryptoStream(m_stream, m_RC2Provider.CreateEncryptor(Encoding.Default.GetBytes(EncryptKey), m_btIV), CryptoStreamMode.Write); m_cstream.Write(m_btEncryptString, 0, m_btEncryptString.Length); m_cstream.FlushFinalBlock(); m_strEncrypt = Convert.ToBase64String(m_stream.ToArray()); m_stream.Close(); m_stream.Dispose(); m_cstream.Close(); m_cstream.Dispose(); } catch (IOException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (ArgumentException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_RC2Provider.Clear(); } return m_strEncrypt; } /// <summary> /// RC2 解密(用变长密钥对大量数据进行加密) /// </summary> /// <param name="DecryptString">待解密密文</param> /// <param name="DecryptKey">解密密钥</param> /// <returns>returns</returns> public static string RC2Decrypt(string DecryptString, string DecryptKey) { if (string.IsNullOrEmpty(DecryptString)) { throw (new Exception("密文不得为空")); } if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密钥不得为空")); } if (DecryptKey.Length < 5 || DecryptKey.Length > 16) { throw (new Exception("密钥必须为5-16位")); } byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; string m_strDecrypt = ""; RC2CryptoServiceProvider m_RC2Provider = new RC2CryptoServiceProvider(); try { byte[] m_btDecryptString = Convert.FromBase64String(DecryptString); MemoryStream m_stream = new MemoryStream(); CryptoStream m_cstream = new CryptoStream(m_stream, m_RC2Provider.CreateDecryptor(Encoding.Default.GetBytes(DecryptKey), m_btIV), CryptoStreamMode.Write); m_cstream.Write(m_btDecryptString, 0, m_btDecryptString.Length); m_cstream.FlushFinalBlock(); m_strDecrypt = Encoding.Default.GetString(m_stream.ToArray()); m_stream.Close(); m_stream.Dispose(); m_cstream.Close(); m_cstream.Dispose(); } catch (IOException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (ArgumentException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_RC2Provider.Clear(); } return m_strDecrypt; } #endregion#region 3DES 加密解密
/// <summary> /// 3DES 加密(基于DES,对一块数据用三个不同的密钥进行三次加密,强度更高) /// </summary> /// <param name="EncryptString">待加密密文</param> /// <param name="EncryptKey1">密钥一</param> /// <param name="EncryptKey2">密钥二</param> /// <param name="EncryptKey3">密钥三</param> /// <returns>returns</returns> public static string DES3Encrypt(string EncryptString, string EncryptKey1, string EncryptKey2, string EncryptKey3) { string m_strEncrypt = "";try
{ m_strEncrypt = DESEncrypt(EncryptString, EncryptKey3);m_strEncrypt = DESEncrypt(m_strEncrypt, EncryptKey2);
m_strEncrypt = DESEncrypt(m_strEncrypt, EncryptKey1);
} catch (Exception ex) { throw ex; }return m_strEncrypt;
} /// <summary> /// 3DES 解密(基于DES,对一块数据用三个不同的密钥进行三次加密,强度更高) /// </summary> /// <param name="DecryptString">待解密密文</param> /// <param name="DecryptKey1">密钥一</param> /// <param name="DecryptKey2">密钥二</param> /// <param name="DecryptKey3">密钥三</param> /// <returns>returns</returns> public static string DES3Decrypt(string DecryptString, string DecryptKey1, string DecryptKey2, string DecryptKey3) { string m_strDecrypt = "";try
{ m_strDecrypt = DESDecrypt(DecryptString, DecryptKey1);m_strDecrypt = DESDecrypt(m_strDecrypt, DecryptKey2);
m_strDecrypt = DESDecrypt(m_strDecrypt, DecryptKey3);
} catch (Exception ex) { throw ex; }return m_strDecrypt;
} #endregion#region AES加密解密
/// <summary> /// AES 加密(高级加密标准,是下一代的加密算法标准,速度快,安全级别高,目前 AES 标准的一个实现是 Rijndael 算法) /// </summary> /// <param name="EncryptString">待加密密文</param> /// <param name="EncryptKey">加密密钥</param> /// <returns></returns> public static string AESEncrypt(string EncryptString, string EncryptKey) { if (string.IsNullOrEmpty(EncryptString)) { throw (new Exception("密文不得为空")); } if (string.IsNullOrEmpty(EncryptKey)) { throw (new Exception("密钥不得为空")); } string m_strEncrypt = ""; byte[] m_btIV = Convert.FromBase64String("Rkb4jvUy/ye7Cd7k89QQgQ=="); Rijndael m_AESProvider = Rijndael.Create(); try { byte[] m_btEncryptString = Encoding.Default.GetBytes(EncryptString); MemoryStream m_stream = new MemoryStream(); CryptoStream m_csstream = new CryptoStream(m_stream, m_AESProvider.CreateEncryptor(Encoding.Default.GetBytes(EncryptKey), m_btIV), CryptoStreamMode.Write); m_csstream.Write(m_btEncryptString, 0, m_btEncryptString.Length); m_csstream.FlushFinalBlock(); m_strEncrypt = Convert.ToBase64String(m_stream.ToArray()); m_stream.Close(); m_stream.Dispose(); m_csstream.Close(); m_csstream.Dispose(); } catch (IOException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (ArgumentException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_AESProvider.Clear(); } return m_strEncrypt; } /// <summary> /// AES 解密(高级加密标准,是下一代的加密算法标准,速度快,安全级别高,目前 AES 标准的一个实现是 Rijndael 算法) /// </summary> /// <param name="DecryptString">待解密密文</param> /// <param name="DecryptKey">解密密钥</param> /// <returns></returns> public static string AESDecrypt(string DecryptString, string DecryptKey) { if (string.IsNullOrEmpty(DecryptString)) { throw (new Exception("密文不得为空")); } if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密钥不得为空")); } string m_strDecrypt = ""; byte[] m_btIV = Convert.FromBase64String("Rkb4jvUy/ye7Cd7k89QQgQ=="); Rijndael m_AESProvider = Rijndael.Create(); try { byte[] m_btDecryptString = Convert.FromBase64String(DecryptString); MemoryStream m_stream = new MemoryStream(); CryptoStream m_csstream = new CryptoStream(m_stream, m_AESProvider.CreateDecryptor(Encoding.Default.GetBytes(DecryptKey), m_btIV), CryptoStreamMode.Write); m_csstream.Write(m_btDecryptString, 0, m_btDecryptString.Length); m_csstream.FlushFinalBlock(); m_strDecrypt = Encoding.Default.GetString(m_stream.ToArray()); m_stream.Close(); m_stream.Dispose(); m_csstream.Close(); m_csstream.Dispose(); } catch (IOException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (ArgumentException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_AESProvider.Clear(); }return m_strDecrypt;
} #endregion#region 1、方法一
/// <summary> /// 1、方法一 (不可逆加密 /// </summary> /// <param name="PasswordString"></param> /// <param name="PasswordFormat"></param> /// <returns></returns> public string EncryptPassword(string PasswordString, string PasswordFormat) { string encryptPassword = null; if (PasswordFormat == "SHA1") { //encryptPassword = FormsAuthortication.HashPasswordForStoringInConfigFile(PasswordString, "SHA1"); encryptPassword = FormsAuthentication.HashPasswordForStoringInConfigFile(PasswordString, "SHA1"); } else if (PasswordFormat == "MD5") { //encryptPassword = FormsAuthortication.HashPasswordForStoringInConfigFile(PasswordString, "MD5"); encryptPassword = FormsAuthentication.HashPasswordForStoringInConfigFile(PasswordString, "MD5"); } return encryptPassword; } #endregion#region 2、方法二 (可逆加密)
public interface IBindesh { string encode(string str); string decode(string str); }public class EncryptionDecryption : IBindesh
{ public string encode(string str) { string htext = "";for (int i = 0; i < str.Length; i++)
{ htext = htext + (char)(str[i] + 10 - 1 * 2); } return htext; }public string decode(string str)
{ string dtext = "";for (int i = 0; i < str.Length; i++)
{ dtext = dtext + (char)(str[i] - 10 + 1 * 2); } return dtext; } } #endregion#region 3、方法三 (可逆加密)
const string KEY_64 = "VavicApp";//注意了,是8个字符,64位 const string IV_64 = "VavicApp"; /// <summary> /// 加密 /// </summary> /// <param name="data">待加密的数据字符</param> /// <returns></returns> public string Encode(string data) { byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);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> /// 解密 /// </summary> /// <param name="data">待解密的数据字符</param> /// <returns></returns> public string Decode(string data) { byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);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 4、方法四 MD5不可逆加密 (32位加密)
/// <summary> /// MD5加密 /// </summary> /// <param name="s"></param> /// <param name="_input_charset"></param> /// <returns></returns> public string GetMD5(string s, string _input_charset) {/// <summary>
/// 与ASP兼容的MD5加密算法 /// </summary>MD5 md5 = new MD5CryptoServiceProvider();
byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s)); 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加密 (16位加密) /// </summary> /// <param name="ConvertString"></param> /// <returns></returns> public static string GetMd5Str(string ConvertString) { MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider(); string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8); t2 = t2.Replace("-", ""); return t2; } #endregion#region 5、方法五 加密解密文本文件
/// <summary>
/// 加密文件 /// </summary> /// <param name="inName"></param> /// <param name="outName"></param> /// <param name="desKey"></param> /// <param name="desIV"></param> private static void EncryptData(String inName, String outName, byte[] desKey, byte[] desIV) { //Create the file streams to handle the input and output files. FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read); FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write); fout.SetLength(0);//Create variables to help with read and write.
byte[] bin = new byte[100]; //This is intermediate storage for the encryption. long rdlen = 0; //This is the total number of bytes written. long totlen = fin.Length; //This is the total length of the input file. int len; //This is the number of bytes to be written at a time.DES des = new DESCryptoServiceProvider();
CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write);//Read from the input file, then encrypt and write to the output file.
while (rdlen < totlen) { len = fin.Read(bin, 0, 100); encStream.Write(bin, 0, len); rdlen = rdlen + len; } encStream.Close(); fout.Close(); fin.Close(); }/// <summary>
/// 解密文件 /// </summary> /// <param name="inName"></param> /// <param name="outName"></param> /// <param name="desKey"></param> /// <param name="desIV"></param> private static void DecryptData(String inName, String outName, byte[] desKey, byte[] desIV) { //Create the file streams to handle the input and output files. FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read); FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write); fout.SetLength(0);//Create variables to help with read and write.
byte[] bin = new byte[100]; //This is intermediate storage for the encryption. long rdlen = 0; //This is the total number of bytes written. long totlen = fin.Length; //This is the total length of the input file. int len; //This is the number of bytes to be written at a time.DES des = new DESCryptoServiceProvider();
CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write);//Read from the input file, then encrypt and write to the output file.
while (rdlen < totlen) { len = fin.Read(bin, 0, 100); encStream.Write(bin, 0, len); rdlen = rdlen + len; } encStream.Close(); fout.Close(); fin.Close(); } #endregion#region 6、方法六 DES加密解密
//默认密钥向量 private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; /// <summary> /// DES加密字符串 /// </summary> /// <param name="encryptString">待加密的字符串</param> /// <param name="encryptKey">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 EncryptDES(string encryptString, string encryptKey) { try { byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8)); byte[] rgbIV = Keys; byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString); DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider(); MemoryStream mStream = new MemoryStream(); CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write); cStream.Write(inputByteArray, 0, inputByteArray.Length); cStream.FlushFinalBlock(); return Convert.ToBase64String(mStream.ToArray()); } catch { return encryptString; } } /// <summary> /// DES解密字符串 /// </summary> /// <param name="decryptString">待解密的字符串</param> /// <param name="decryptKey">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 DecryptDES(string decryptString, string decryptKey) { try { byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey); byte[] rgbIV = Keys; byte[] inputByteArray = Convert.FromBase64String(decryptString); DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider(); MemoryStream mStream = new MemoryStream(); CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write); cStream.Write(inputByteArray, 0, inputByteArray.Length); cStream.FlushFinalBlock(); return Encoding.UTF8.GetString(mStream.ToArray()); } catch { return decryptString; } } #endregion#region 加密解密结果测试
/* Response.Write("<br>-----------MD5加密---------------<br>"); Response.Write(SDKSecurity.MD5Encrypt("上海台骅国际"));Response.Write("<br>-----------DES加密---------------<br>");
Response.Write(SDKSecurity.DESEncrypt("上海台骅国际", "anson-xu")); Response.Write("<br>-----------DES解密---------------<br>"); Response.Write(SDKSecurity.DESDecrypt("Ey2jG5ICk1CQuTbO4fpIzA==", "anson-xu"));Response.Write("<br>-----------AES加密---------------<br>");
Response.Write(SDKSecurity.AESEncrypt("上海台骅国际", "ansonxuyu")); Response.Write("<br>-----------AES解密---------------<br>"); Response.Write(SDKSecurity.AESDecrypt("CUsBYe92HqgFjAMiyETDOQ==", "ansonxuyu")); */ #endregion}