cisco type 7 解密 password

#include "stdafx.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
 
char DecPwd[255]={0};
char xlat[] = {
0×64, 0×73, 0×66, 0×64, 0x3b, 0x6b, 0×66, 0x6f,
0×41, 0x2c, 0x2e, 0×69, 0×79, 0×65, 0×77, 0×72,
0x6b, 0x6c, 0×64, 0x4a, 0x4b, 0×44, 0×48, 0×53 , 0×55, 0×42
};
 
int  decpwd(char * pOriPwd){ //解密函数
int pp = 0;
int iOriPwdLen = strlen(pOriPwd);
int seed,i,j=0;
seed = (pOriPwd[0]-’0′)*10 + (pOriPwd[1]-’0′);
printf(“intilize seed is %d/n”,seed);
 
for (i=2;i<=iOriPwdLen;i++){
if (i>2 && i%2 == 0){
 
DecPwd[j++] = pp ^ xlat[seed++];
pp =0 ;
seed %= 26;
 
}
pp*=16;
char lala = toupper(pOriPwd[i]);
if(lala >= ’0′ && lala<=’9′)
{
pp+=lala-’0′;
continue;
}else if (lala>=’A'&& lala<=’F'){
 
pp+=lala-’A'+10;
continue;
}
if (i != iOriPwdLen)
return -1;
 
}
DecPwd[j]=’/0′;
return 0;
}
char enccode[255]={0};
int encpwd(char *pwd) //加密函数
{
int seed=0;
srand((unsigned)time(NULL));
rand();
seed = (double)rand()/(RAND_MAX+1)*25;
printf(“intilize seed is %d/n”,seed);
int i ,iCode= 0;
int iLeft,iRight;
enccode[0] = seed /10 + ’0′;
enccode[1] = seed %10 + ’0′;
for (i = 0 ; i <= strlen(pwd)-1 ; i++)
{
iCode = xlat[seed++] ^ pwd[i];
seed %= 26;
iLeft = iCode /16 ;
if (iLeft > 9)
iLeft = iLeft -10 +’A';
else
iLeft +=’0′;
iRight = iCode % 16 ;
if (iRight > 9)
iRight = iRight -10 + ‘A’;
else
iRight+=’0′;
enccode[i*2+2] = iLeft;
enccode[i*2+3] = iRight;
 
}
enccode[i*2+2] = 0;
return 0;
}
 
int main(int argc,char * argv[])
{
if (argc == 3 && strcmp(argv[1],”-e”) == 0 && strlen(argv[2])<=16)
{
if (encpwd(argv[2]) == 0)
printf(“结果是:%s”,enccode);
else
printf(“I’m so sorry,encrypt is failed,please try again!”);
return 1;
}
if (argc <2 || strlen(argv[1]) %2 !=0 || strlen(argv[1]) <4 ){
printf(“Cisco Type-7 password decrpter !Programmed by fuyewei at 2010-06-03./nPlease Enter Cisco Type-7 Code Correctly! /
/ne.g. 095F41041C480713181F13253920 and so on”);
return -1;
}
if(decpwd(argv[1]) == 0)
printf(“解密成功，密码是:%s”,DecPwd);
return 0;
}