类文件代码
using System;using System.Text;using System.IO;using System.Security.Cryptography;namespace WebApplicationI
{
public abstract class ClassDE
{
public static void Ecode(string strEcode) { btnKeyGen(); btnIVGen(); txtEncrypted = EncryptString(strEcode); // txtOriginal = DecryptString(txtEncrypted);
} public static void Dcode(string strEncrypted) { txtEncrypted = strEncrypted; btnKeyGen(); btnIVGen(); txtOriginal = DecryptString(txtEncrypted); } public static string Encrypted { get {return txtEncrypted; } } public static string Original { get{return txtOriginal;} } private static SymmetricAlgorithm mCSP; //下面的两个key值可以自己设置 private static string txtKey = "tkGGRmBErVC=";//设置加密Key private static string txtIV = "Kl7ZgtM1dvQ=";//设置加密IV private static string txtEncrypted =string.Empty ,txtOriginal = string.Empty ; private static void btnKeyGen() { mCSP = SetEnc(); byte[] byt2 = Convert.FromBase64String(txtKey); mCSP.Key = byt2; } private static void btnIVGen() { byte[] byt2 = Convert.FromBase64String(txtIV); mCSP.IV = byt2; } private static string EncryptString(string Value) { ICryptoTransform ct; MemoryStream ms; CryptoStream cs; byte[] byt; ct = mCSP.CreateEncryptor(mCSP.Key, mCSP.IV); byt = Encoding.UTF8.GetBytes(Value); ms = new MemoryStream(); cs = new CryptoStream(ms, ct, CryptoStreamMode.Write); cs.Write(byt, 0, byt.Length); cs.FlushFinalBlock(); cs.Close(); return Convert.ToBase64String(ms.ToArray()); } private static string DecryptString(string Value) { ICryptoTransform ct; MemoryStream ms; CryptoStream cs; byte[] byt; ct = mCSP.CreateDecryptor(mCSP.Key, mCSP.IV); byt = Convert.FromBase64String(Value); ms = new MemoryStream(); cs = new CryptoStream(ms, ct, CryptoStreamMode.Write); cs.Write(byt, 0, byt.Length); cs.FlushFinalBlock(); cs.Close(); return Encoding.UTF8.GetString(ms.ToArray()); } private static SymmetricAlgorithm SetEnc() { return new DESCryptoServiceProvider(); } }
}
前台调用部分
string _sqlConn =" 需要加密的字符串"; Page.Response .Write("加密测试："+_sqlConn); Page.Response .Write("<br>"); ClassDE.Ecode (_sqlConn); Page.Response .Write("<br>"); Page.Response .Write( ClassDE.Encrypted); Page.Response .Write("<br>"); Page.Response .Write( ClassDE.Original); Page.Response .Write("<br>"); Page.Response .Write("<br>"); Page.Response .Write("<br>"); Page.Response .Write("<br>"); string Encode = " 经过加密的字符串"; Page.Response .Write("解密测试："+Encode); Page.Response .Write("<br>"); ClassDE.Dcode (Encode); Page.Response .Write("<br>"); Page.Response .Write( ClassDE.Encrypted); Page.Response .Write("<br>"); Page.Response .Write( ClassDE.Original);