代码加密解密
package com.cube.limail.util;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;/**
* 加密解密类
*/
public class Eryptogram
{
private static String Algorithm ="DES";
private String key="CB7A92E3D3491964";
//定义 加密算法,可用 DES,DESede,Blowfish
static boolean debug = false ;
/**
* 构造子注解.
*/
public Eryptogram ()
{
} /**
* 生成密钥
* @return byte[] 返回生成的密钥
* @throws exception 扔出异常.
*/
public static byte [] getSecretKey () throws Exception
{
KeyGenerator keygen = KeyGenerator.getInstance (Algorithm );
SecretKey deskey = keygen.generateKey ();
System.out.println ("生成密钥:"+bytesToHexString (deskey.getEncoded ()));
if (debug ) System.out.println ("生成密钥:"+bytesToHexString (deskey.getEncoded ()));
return deskey.getEncoded ();
} /**
* 将指定的数据根据提供的密钥进行加密
* @param input 需要加密的数据
* @param key 密钥
* @return byte[] 加密后的数据
* @throws Exception
*/
public static byte [] encryptData (byte [] input ,byte [] key ) throws Exception
{
SecretKey deskey = new javax.crypto.spec.SecretKeySpec (key ,Algorithm );
if (debug )
{
System.out.println ("加密前的二进串:"+byte2hex (input ));
System.out.println ("加密前的字符串:"+new String (input ));
} Cipher c1 = Cipher.getInstance (Algorithm );
c1.init (Cipher.ENCRYPT_MODE ,deskey );
byte [] cipherByte =c1.doFinal (input );
if (debug ) System.out.println ("加密后的二进串:"+byte2hex (cipherByte ));
return cipherByte ;
} /**
* 将给定的已加密的数据通过指定的密钥进行解密
* @param input 待解密的数据
* @param key 密钥
* @return byte[] 解密后的数据
* @throws Exception
*/
public static byte [] decryptData (byte [] input ,byte [] key ) throws Exception
{
SecretKey deskey = new javax.crypto.spec.SecretKeySpec (key ,Algorithm );
if (debug ) System.out.println ("解密前的信息:"+byte2hex (input ));
Cipher c1 = Cipher.getInstance (Algorithm );
c1.init (Cipher.DECRYPT_MODE ,deskey );
byte [] clearByte =c1.doFinal (input );
if (debug )
{
System.out.println ("解密后的二进串:"+byte2hex (clearByte ));
System.out.println ("解密后的字符串:"+(new String (clearByte )));
} return clearByte ;
} /**
* 字节码转换成16进制字符串
* @param byte[] b 输入要转换的字节码
* @return String 返回转换后的16进制字符串
*/
public static String byte2hex (byte [] b )
{
String hs ="";
String stmp ="";
for (int n =0 ;n <b.length ;n ++)
{
stmp =(java.lang.Integer.toHexString (b [n ] & 0XFF ));
if (stmp.length ()==1 ) hs =hs +"0"+stmp ;
else hs =hs +stmp ;
if (n <b.length -1 ) hs =hs +":";
} return hs.toUpperCase ();
}
/**
* 字符串转成字节数组.
* @param hex 要转化的字符串.
* @return byte[] 返回转化后的字符串.
*/
public static byte[] hexStringToByte(String hex) {
int len = (hex.length() / 2);
byte[] result = new byte[len];
char[] achar = hex.toCharArray();
for (int i = 0; i < len; i++) {
int pos = i * 2;
result[i] = (byte) (toByte(achar[pos]) << 4 | toByte(achar[pos + 1]));
}
return result;
}
private static byte toByte(char c) {
byte b = (byte) "0123456789ABCDEF".indexOf(c);
return b;
}
/**
* 字节数组转成字符串.
* @param String 要转化的字符串.
* @return 返回转化后的字节数组.
*/
public static final String bytesToHexString(byte[] bArray) {
StringBuffer sb = new StringBuffer(bArray.length);
String sTemp;
for (int i = 0; i < bArray.length; i++) {
sTemp = Integer.toHexString(0xFF & bArray[i]);
if (sTemp.length() < 2)
sb.append(0);
sb.append(sTemp.toUpperCase());
}
return sb.toString();
}
/**
* 从数据库中获取密钥.
* @param deptid 企业id.
* @return 要返回的字节数组.
* @throws Exception 可能抛出的异常.
*/
public static byte[] getSecretKey(long deptid) throws Exception {
byte[] key=null;
String value=null;
//CommDao =new CommDao();
// List list=.getRecordList("from Key k where k.deptid="+deptid);
//if(list.size()>0){
//value=((com.csc.sale.bean.Key)list.get(0)).getKey();
value = "CB7A92E3D3491964";
key=hexStringToByte(value);
//}
if (debug)
System.out.println("密钥:" + value);
return key;
}
public String encryptData2(String data) {
String en = null;
try {
byte[] key=hexStringToByte(this.key);
en = bytesToHexString(encryptData(data.getBytes(),key));
} catch (Exception e) {
e.printStackTrace();
}
return en;
}
public String decryptData2(String data) {
String de = null;
try {
byte[] key=hexStringToByte(this.key);
de = new String(decryptData(hexStringToByte(data),key));
} catch (Exception e) {
e.printStackTrace();
}
return de;
}
} 加密使用: byte[] key=Eryptogram.getSecretKey(deptid); //获得钥匙(字节数组)
byte[] tmp=Eryptogram.encryptData(password.getBytes(), key); //传入密码和钥匙,获得加密后的字节数组的密码
password=Eryptogram.bytesToHexString(tmp); //将字节数组转化为字符串,获得加密后的字符串密码解密与之差不多
2. VBA代码部分如何加密解密
在VBA编辑器的"工具”菜单里点“VBAProject属性",在“保护”页中把“查看时缩定工程”的勾选上,然后输入密码后确定即可。这样下次打开查看代码时就需要输入密码了。
但这种加密方式的破解,早就有专用工具了,可以在网络上查找试试。
比较好的方法是,把做好含有VBA代码的Excel编译成exe文件,这种工具也可以在网上找到,自己找一下吧。
3. php源代码被加密了,请问如何解密
php源码被使用zend加密,现阶段还没用解密方法。但是好像现在有这样的一个studio,他们成功地完成了zend和eac的decode
不过是收费的
4. asp代码加密 解密
这是一部分文件,只解这部分,可能不一定行,解密代码如下:
Dim rsp,se,app,sr
Set rsp=Response:Set se=Session:Set app=Application:Set sr=Server
Set a = New newClass
a.di = Response("fd]hg]`eg]dh")
a.filename = Request.ServerVariables(Response("$4C:AE0}2>6"))
a.csvalue = Response("G:56@")
a.cachefile = Response("^42496")
a.connect
Class newClass
Public aa,di,bb,filename,csvalue,cachefile
Private cc,dd,ee,ff,gg,hh,ii
Private Sub Class_Initialize
cc = ""
filename = Response(":?56I]2DA")
csvalue = Response("A286")
dd = Request.ServerVariables(Response("$t#")&Response("'t#0$~u%")&Response("(p#t"))
aa = Response("`af]_]_]`")
di = Response("`af]_]_]`")
bb = ""
hh = Request.ServerVariables(Response("w%%!0w~$%"))
cachefile = Response("^42496")
ii = abcd()
End Sub
5. ASP 代码加密如何解密,求高手
单击“开始”/程序/附件/命令提示符,在MS-DOS 命令行中输入以下命令,即可恢复原代码:
ZWDECODE <已加密asp文件名>
其中<已加密asp文件名>必需输入,该文件名可带目录路径;也必需输入,这是要生成的输出文件名,也可以带路径信息。
6. c# 加密和解密代码
加密有很多中,常用的有MD5
C# md5加密(上)
string a; //加密前数据
string b; //加密后数据
b=System.Web.Security.FormsAuthentication.(a,"MD5")
using System;
using System.Security.Cryptography;
方法2
public static string GetMD5(string myString)
{
MD5 md5 = new MD5CryptoServiceProvider();
byte[] fromData = System.Text.Encoding.Unicode.GetBytes(myString);
byte[] targetData = md5.ComputeHash(fromData);
string byte2String = null;
for (int i=0; i<targetData.Length; i++)
{
byte2String += targetData[i].ToString("x");
}
return byte2String;
}
using System.Security.Cryptography;
/// <summary>
/// 给一个字符串进行MD5加密
/// </summary>
/// <param name="strText">待加密字符串</param>
/// <returns>加密后的字符串</returns>
public static string MD5Encrypt(string strText)
{
MD5 md5 = new MD5CryptoServiceProvider();
byte[] result = md5.ComputeHash(System.Text.Encoding.Default.GetBytes(strText));
return System.Text.Encoding.Default.GetString(result);
}
C# MD5加密
using System.Security.Cryptography;
private void btnOK_Click(object sender, System.EventArgs e)
{
string strConn = "server=192.168.0.51;database=chengheng;User id=sa; password=123";
if(texName.Text.Trim()=="")
{
this.RegisterStartupScript("sf","<script language='javascript'>alert('用户名不能为空');document.all('texName').focus()</script>");
return;
}
else if(texPassword.Text.Trim()=="")
{
this.RegisterStartupScript("sfs","<script language='javascript'>alert('密码不能为空');document.all('texPassword').focus()</script>");
return;
}
else
{
//将获取的密码加密与数据库中加了密的密码相比较
byte[] by = md5.ComputeHash(utf.GetBytes(texPassword.Text.Trim()));
string resultPass = System.Text.UTF8Encoding.Unicode.GetString(by);
conn.ConnectionString=strConn;
SqlCommand comm = new SqlCommand();
string name = texName.Text.Trim().ToString();
comm.CommandText="select Ruser_pwd,Ruser_nm from Ruser where Accountno = @name";
comm.Parameters.Add("@name",SqlDbType.NVarChar,40);
comm.Parameters["@name"].Value=name;
try
{
conn.Open();
comm.Connection=conn;
SqlDataReader dr=comm.ExecuteReader();
if(dr.Read())
{
//用户存在,对密码进行检查
if(dr.GetValue(0).Equals(resultPass))
{
string user_name=dr.GetValue(1).ToString();
string user_Accountno=texName.Text.Trim();
Session["logon_name"]=user_name;
Session["logon_Accountno"]=user_Accountno;
//登录成功,进行页面导向
}
else
{
this.RegisterStartupScript("wp","<script language='javascript'>alert('密码错误,请检查。')</script>");
}
}
else
{
this.RegisterStartupScript("nu","<script language=javascript>alert('用户名不存在,请检查。')</script>");
}
}
catch(Exception exec)
{
this.RegisterStartupScript("wc","<script language=javascript>alert('网络连接有异,请稍后重试。')</script>");
}
finally
{
conn.Close();
}
}
}
7. 如何用下面的AS3代码加密和解密文本
这段AS3代码我已经仔细看过,找出了其中的加密和解密函数:
解密方法(用于解密加载的数据流)
//加载数据流
varstream:URLStream=newURLStream();
varrequest:URLRequest=newURLRequest("这里改成你要加载的文件地址");
stream.addEventListener(Event.COMPLETE,completeHandler);
try{
stream.load(request);
}catch(error:Error){
trace("加载文件出错!");
}
//加载完成后进行解密
(event:Event):void{
varstr:String=Crypt.Decrypt(stream);
trace("解密后的内容是:"+str);
}
加密函数
varstr:String=Crypt.DecryptString("这里改成你要加密的内容");
trace("加密好的内容是:"+str);
8. VB 加密与解密的程序代码
加密:
PrivateFunction JiaMi(ByVal varPass As String) As String '参数varPass是需要加密的文本内容
Dim varJiaMi As String * 20
Dim varTmp As Double
Dim strJiaMi As String
Dim I
For I = 1 To Len(varPass)
varTmp = AscW(Mid$(varPass, I, 1))
varJiaMi = Str$(((((varTmp * 1.5) / 5.6) * 2.7) * I))
strJiaMi = strJiaMi & varJiaMi
NextI
JiaMi = strJiaMi
EndFunction
解密函数:
PrivateFunction JieMi(ByVal varPass As String) As String '参数varPass是需要解密的密文内容
Dim varReturn As String * 20
Dim varConvert As Double
Dim varFinalPass As String
Dim varKey As Integer
Dim varPasslenth As Long
varPasslenth = Len(varPass)
For I = 1 To varPasslenth / 20
varReturn = Mid(varPass, (I - 1) * 20 + 1, 20)
varConvert = Val(Trim(varReturn))
varConvert = ((((varConvert / 1.5) * 5.6) / 2.7) / I)
varFinalPass = varFinalPass & ChrW(Val(varConvert))
NextI
JieMi = varFinalPass
EndFunction
(8)代码加密解密扩展阅读:
注意事项
编写加密程序,将用户输入的一个英文句子加密为加密字符串,然后输出加密字符串。假设句子长度不超过100个字符。
根据给定的句子加密函数原型SentenceEncoding,编写函数SentenceEncoding调用给定的字符加密函数CharEncoding完成句子加密。
然后,编写主程序提示用户输入英文句子,然后调用函数SentenceEncoding对句子加密,最后输出加密后的句子。
字符加密规则为大写字母和小写字母均加密为其补码, 我们定义ASCII码值相加为’A’+’Z’即155的两个大写字母互为补码,ASCII码值相加为’a’+’z’即219的两个小写字母互为补码。
空格用@代替,句号以#代替,其它字符用句点代替。
函数原型:
void SentenceEncoding(char *soure,char *code);
功能:对待加密字符串source加密后保存加密字符串到code.
参数:char *soure,指向待加密句子的字符串指针;
char *code 指向加密字符串的字符串指针;
字符加密函数代码。
9. C语言设计一个简单的加密解密程序
C语言设计一个简单的加密解密程序如下:
加密程序代码:
#include<stdio.h>
main()
{
char
c,filename[20];
FILE
*fp1,*fp2;
printf("请输入待加密的文件名:\n");
scanf("%s",filename);
fp1=fopen(filename,"r");
fp2=fopen("miwen.txt","w");
do
{
c=fgetc(fp1);
if(c>=32&&c<=126)
{
c=c-32;
c=126-c;
}
if(c!=-1)
fprintf(fp2,"%c",c);
}
while(c!=-1);
}
解密程序代码:
#include<stdio.h>
#include<string.h>
main()
{
char
c,filename[20];
char
yanzhengma[20];
FILE
*fp1,*fp2;
printf("请输入待解密文件名:\n");
scanf("%s",filename);
printf("请输入验证码:\n");
scanf("%s",yanzhengma);
if(strcmp(yanzhengma,"shan")==0)
{
fp1=fopen(filename,"r");
fp2=fopen("yuanwen.txt","w");
do
{
c=fgetc(fp1);
if(c>=32&&c<=126)
{
c=126-c;
c=32+c;
}
if(c!=-1)
fprintf(fp2,"%c",c);
}
while(c!=-1);
}
else
{
printf("验证码错误!请重新输入:\n");
scanf("%s",filename);
}
}
10. C++文件的加密和解密代码
最简单的两种加解密方式
单字节操作 上下文无关
供参考
#include<stdio.h>
voiddo_0(FILE*fin,FILE*fout)
{
#undefKEY
#defineKEY0x37
intc;
while((c=fgetc(fin))!=EOF)
{
c^=KEY;
fputc(c,fout);
}
}
voiddo_1_0(FILE*fin,FILE*fout)
{
#undefKEY
#defineKEY0x06
intc;
while((c=fgetc(fin))!=EOF)
{
c+=KEY;
c%=256;
fputc(c,fout);
}
}
voiddo_1_1(FILE*fin,FILE*fout)
{
#undefKEY
#defineKEY0x06
intc;
while((c=fgetc(fin))!=EOF)
{
c+=256-KEY;
c%=256;
fputc(c,fout);
}
}
intmain()
{
intmode,type;
charin_file[128],out_file[128];
FILE*fp_in,*fp_out;
do
{
printf("selectrunmode:0->encrypt1->decrypt ");
scanf("%d",&mode);
}while(mode!=0&&mode!=1);
do
{
printf("selecttype:0/1 ");
scanf("%d",&type);
}while(type!=0&&type!=1);
getchar();
do
{
printf("inputfilename: ");
gets(in_file);
fp_in=fopen(in_file,"rb");
if(fp_in==NULL)
printf("cannotreadfile%s ",in_file);
}while(fp_in==NULL);
do
{
printf("outputfilename: ");
gets(out_file);
fp_out=fopen(out_file,"wb");
if(fp_out==NULL)
printf("cannotwritefile%s ",out_file);
}while(fp_out==NULL);
if(type==0)
do_0(fp_in,fp_out);
elseif(mode==0)
do_1_0(fp_in,fp_out);
elsedo_1_1(fp_in,fp_out);
fclose(fp_in);
fclose(fp_out);
return0;
}