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//声明加密字符生成的随机数的位数 public const int LENGTH = 32; //声明加密字符前后的分隔长度 public const int LEN = 4; ///方式作用:根据参数对其加密 ///参数: /// string strEncrypt;欲加密的字符 ///返回结果:加密后的字符 public static byte[] SourceEncrypt(string strEncrypt) { string source = Encrypt(strEncrypt); //first string first = Encrypt(source.Substring(0,LEN)); //second string second = Encrypt(source.Substring(LEN-1,source.Length-LEN)); //third string third = Encrypt(source.Substring(source.Length-LEN,LEN)); //four byte[] Random = new byte[LENGTH]; RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider(); rng.GetNonZeroBytes(Random); string four = Encrypt(System.Text.Encoding.ASCII.GetString(Random)); string all = first+second+third+four; return System.Text.Encoding.ASCII.GetBytes(all); } // end SourceEncrypt ///方式作用:对参数进行加密 ///参数: /// string strEncrypt:欲加密的字符 /// 返回结果:加密后的字符 public static string Encrypt(string strEncrypt) { SHA256Managed sha = new SHA256Managed(); byte[] VALUE = sha.ComputeHash(System.Text.Encoding.ASCII.GetBytes(strEncrypt)); return System.Text.Encoding.ASCII.GetString(VALUE); } // end Encrypt ///方式作用:对参数进行比较 ///参数: /// string strSource:原字符 /// string strObject:目标字符 /// 返回结果:bool是否相等 public static bool CompareEncrypt(byte[] strSource,string strobject) { bool result = true; byte[] strObject = SourceEncrypt(strobject); //strObject = SourceEncrypt(strObject); if((strSource==null) || (strObject==null) || (strSource.Length != strObject.Length)) result = false; else { //strSource = strSource.Substring(0,strSource.Length-LENGTH); //strObject = strObject.Substring(0,strObject.Length-LENGTH); //byte[] Source = System.Text.Encoding.ASCII.GetBytes(strSource); //byte[] Obj = System.Text.Encoding.ASCII.GetBytes(strObject); byte[] Source = strSource; byte[] Obj = strObject; if(Source.Length != Obj.Length) result = false; else { for(int i = 0; i < Source.Length-LENGTH; i++) { if(Source[i] != Obj[i]) { result = false; break; } } } } return result; } //end CompareyEncrypt 返回类别: 教程 上一教程: ECC加密算法入门介绍 下一教程: 编写通用的asp防注入程序 您可以阅读与"发一个加密的方式"相关的教程: · 用ASP写个加密和解密的类 · MD5加密的JAVASCRIPT实现例子 · 加密后台数据库的方式 · 判定一个ACCESS数据库中某个表是否存在的方式 · 用ASP开发一个在线考试系统 |
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