using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.IO;using System.Security.Cryptography;using System.Text;namespace sql_function{ /// /// 所有加密方法 /// 定义字符串加密接口 [MD5加密,SHA1加密，字符串加密] 前台只需定这样定义： /// sql_function.InterFaceStringEncryptionDecryption QueryStringEncodeCodeAndDncodeCode =new sql_function.StringEncryptionDecryption(); /// 说明：其中sql_function代表命名空间名称 InterFaceStringEncryptionDecryption代表接口名称 StringEncryptionDecryption代表类名 /// publicinterfaceInterFaceStringEncryptionDecryption { #region (1) QueryString加密与解密 开始 /// /// QueryString加密 /// /// /// stringQueryStringEncodeCode(stringStringSQL); /// /// QueryString解密 /// /// /// stringQueryStringDncodeCode(stringStringSQL); #endregion #region (2) Rijndael算法 /// /// 加密方法 /// /// 待加密的串 /// 经过加密的串 stringRijndaelEncrypt(stringSource); /// /// 解密方法 /// /// 待解密的串 /// 经过解密的串 stringRijndaelDecrypt(stringSource); #endregion (2) Rijndael算法 #region ( 3 ) Base64与UTF8混用 /// /// 字符串加密 /// /// /// stringBUEncrypt(string bb); /// /// 字符串解密 /// /// /// stringBUDecrypt(string aa); #endregion #region ( 4 )固定密钥算法 /// /// 字符串加密 /// /// /// stringSKeyEncrypt(string strText); /// /// 字符串解密 /// /// /// stringSKeyDecrypt(string strText); #endregion #region ( 5 )DES算法 /// /// DES加密 /// /// /// stringDESEncrypt(string strSource); /// /// DES解密 /// /// /// stringDESDecrypt(string strSource); #endregion #region ( 6 ) 加密密码MD5T和SHA1 /// /// 加密密码MD5T和SHA1 /// /// 字符串 /// 加密类别 /// 加密长度 /// string encrypting(string strSource,int strFlag,int substringlen); #endregion } /// /// 定义接口类 加密的类的方法 /// publicclassStringEncryptionDecryption:InterFaceStringEncryptionDecryption { #region (1) QueryString加密与解密 开始 /// /// QueryString加密 /// /// /// publicstringQueryStringEncodeCode(string code) { string result =""; if(code ==null|| code =="") { result =""; } else { result =Convert.ToBase64String(System.Text.Encoding.Default.GetBytes(""+ code +"")).Replace("+","%2B"); } return result; } /// /// QueryString解密 /// /// /// publicstringQueryStringDncodeCode(string code) { string result =""; if(code ==null|| code =="") { result =""; } else { try { result =System.Text.Encoding.Default.GetString(Convert.FromBase64String(code.Replace("%2B","+"))); } catch(FormatException ex)///抛出异常 [错误信息“Base-64字符数组的无效长度”] { result ="0"; } } return result; } #endregion (1) QueryString加密与解密 结束 #region ( 2 ) Rijndael算法 privatestaticSymmetricAlgorithm mobjCryptoService =newRijndaelManaged(); privatestaticstringKey="Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7"; /// /// 获得密钥 /// /// 密钥 privatebyte[]GetLegalKey() { string sTemp =Key; mobjCryptoService.GenerateKey(); byte[] bytTemp = mobjCryptoService.Key; intKeyLength= bytTemp.Length; if(sTemp.Length>KeyLength) sTemp = sTemp.Substring(0,KeyLength); elseif(sTemp.Length /// 获得初始向量IV /// /// 初试向量IV privatebyte[]GetLegalIV() { string sTemp ="E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk"; mobjCryptoService.GenerateIV(); byte[] bytTemp = mobjCryptoService.IV; intIVLength= bytTemp.Length; if(sTemp.Length>IVLength) sTemp = sTemp.Substring(0,IVLength); elseif(sTemp.Length /// 加密方法 /// /// 待加密的串 /// 经过加密的串 publicstringRijndaelEncrypt(stringSource) { byte[] bytIn = UTF8Encoding.UTF8.GetBytes(Source); MemoryStream ms =newMemoryStream(); mobjCryptoService.Key=GetLegalKey(); mobjCryptoService.IV =GetLegalIV(); ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor(); CryptoStream cs =newCryptoStream(ms, encrypto,CryptoStreamMode.Write); cs.Write(bytIn,0, bytIn.Length); cs.FlushFinalBlock(); ms.Close(); byte[] bytOut = ms.ToArray(); returnConvert.ToBase64String(bytOut); } /// /// 解密方法 /// /// 待解密的串 /// 经过解密的串 publicstringRijndaelDecrypt(stringSource) { try { byte[] bytIn =Convert.FromBase64String(Source); MemoryStream ms =newMemoryStream(bytIn,0, bytIn.Length); mobjCryptoService.Key=GetLegalKey(); mobjCryptoService.IV =GetLegalIV(); ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor(); CryptoStream cs =newCryptoStream(ms, encrypto,CryptoStreamMode.Read); StreamReader sr =newStreamReader(cs); return sr.ReadToEnd(); } catch(Exception ex) { return ex.Message; } } #endregion #region ( 3 )Base64与UTF8混用 //字符串加密 publicstringBUEncrypt(string bb) { byte[]by=newbyte[bb.Length]; by=System.Text.Encoding.UTF8.GetBytes(bb); string r =Convert.ToBase64String(by); return r; } //字符串解密 publicstringBUDecrypt(string aa) { try { byte[]by=Convert.FromBase64String(aa); string r =Encoding.UTF8.GetString(by); return r; } catch(Exception ex) { return ex.Message; } } #endregion #region ( 4 )固定密钥算法 publicstaticByte[]Iv64={11,22,33,44,55,66,77,88}; publicstaticByte[] byKey64 ={10,20,30,40,50,60,70,80}; //字符串加密 publicstringSKeyEncrypt(string strText) { try { DESCryptoServiceProvider des =newDESCryptoServiceProvider(); Byte[] inputByteArray =Encoding.UTF8.GetBytes(strText); MemoryStream ms =newMemoryStream(); CryptoStream cs =newCryptoStream(ms, des.CreateEncryptor(byKey64,Iv64),CryptoStreamMode.Write); cs.Write(inputByteArray,0, inputByteArray.Length); cs.FlushFinalBlock(); returnConvert.ToBase64String(ms.ToArray()); } catch(Exception ex) { return ex.Message; } } //字符串解密 publicstringSKeyDecrypt(string strText) { Byte[] inputByteArray =newbyte[strText.Length]; try { DESCryptoServiceProvider des =newDESCryptoServiceProvider(); inputByteArray =Convert.FromBase64String(strText); MemoryStream ms =newMemoryStream(); CryptoStream cs =newCryptoStream(ms, des.CreateDecryptor(byKey64,Iv64),CryptoStreamMode.Write); cs.Write(inputByteArray,0, inputByteArray.Length); cs.FlushFinalBlock(); System.Text.Encoding encoding =System.Text.Encoding.UTF8; return encoding.GetString(ms.ToArray()); } catch(Exception ex) { return ex.Message; } } #endregion #region ( 5 )DES算法 publicstaticbyte[]DESKey=newbyte[]{0x82,0xBC,0xA1,0x6A,0xF5,0x87,0x3B,0xE6,0x59,0x6A,0x32,0x64,0x7F,0x3A,0x2A,0xBB,0x2B,0x68,0xE2,0x5F,0x06,0xFB,0xB8,0x2D,0x67,0xB3,0x55,0x19,0x4E,0xB8,0xBF,0xDD}; /// /// DES加密 /// /// 待加密字串 /// 32位Key值 /// 加密后的字符串 publicstringDESEncrypt(string strSource) { returnDESEncryptF(strSource,DESKey); } privatestringDESEncryptF(string strSource,byte[] key) { SymmetricAlgorithm sa =Rijndael.Create(); sa.Key= key; sa.Mode=CipherMode.ECB; sa.Padding=PaddingMode.Zeros; MemoryStream ms =newMemoryStream(); CryptoStream cs =newCryptoStream(ms, sa.CreateEncryptor(),CryptoStreamMode.Write); byte[] byt =Encoding.Unicode.GetBytes(strSource); cs.Write(byt,0, byt.Length); cs.FlushFinalBlock(); cs.Close(); returnConvert.ToBase64String(ms.ToArray()); } /// /// DES解密 /// /// 待解密的字串 /// 32位Key值 /// 解密后的字符串 publicstringDESDecrypt(string strSource) { returnDESDecryptF(strSource,DESKey); } privatestringDESDecryptF(string strSource,byte[] key) { try { SymmetricAlgorithm sa =Rijndael.Create(); sa.Key= key; sa.Mode=CipherMode.ECB; sa.Padding=PaddingMode.Zeros; ICryptoTransform ct = sa.CreateDecryptor(); byte[] byt =Convert.FromBase64String(strSource); MemoryStream ms =newMemoryStream(byt); CryptoStream cs =newCryptoStream(ms, ct,CryptoStreamMode.Read); StreamReader sr =newStreamReader(cs,Encoding.Unicode); return sr.ReadToEnd(); } catch(Exception ex) { return ex.Message; } } #endregion #region ( 6 ) 加密密码MD5T和SHA1 /// /// 加密密码MD5T和SHA1 /// /// 字符串 /// 加密类别 /// 加密长度 /// /// publicstring encrypting(string strSource,int strFlag,int substringlen) { string ss =""; if(strFlag ==1)///MD5加密 { if(substringlen ==16)//16位MD5加密（取32位加密的9~25字符） { ss =FormsAuthentication.HashPasswordForStoringInConfigFile(strSource,"MD5").ToLower().Substring(8,16); } elseif(substringlen ==32)//32位加密 { ss =FormsAuthentication.HashPasswordForStoringInConfigFile(strSource,"MD5").ToLower(); } } elseif(strFlag ==2)///SHA1加密 { if(substringlen ==16)//SHA1 16位加密 { ss =FormsAuthentication.HashPasswordForStoringInConfigFile(strSource,"SHA1").ToLower().Substring(8,16); } elseif(substringlen ==32)//SHA1 40位加密 { ss =FormsAuthentication.HashPasswordForStoringInConfigFile(strSource,"SHA1").ToLower(); } } else { ss =""; } return ss; } #endregion }}