[C language] Can you write a string encode function based on this simple decode function?

Hi. From the documentation of CCProxy, I got this function that decodes a user password. (string with numbers to string with characters)
I need the exact opposite as well, the code needed to encode the password. (to a 'number string').

To someone who knows a little C, this should be fairly trivial. If you can reproduce this function in JavaScript that would be even more terrific. That way I don't have to use a command line application child process to do this simple encoding/decoding.

Can you help me? Thanks!

#include "stdafx.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define _MAX_BUF_LEN 2014

static char* PasswordDecode(char * szPassword)
{
    char szEncode[1024];
    char strDecodePass[_MAX_BUF_LEN + 1] = { "" }, strPass[_MAX_BUF_LEN + 1] = { "" };

    strcpy(strDecodePass, szPassword);

    for (unsigned int i = 0; i < strlen(strDecodePass) / 3; i++)
    {
        char szCode[_MAX_BUF_LEN + 1];
        strcpy(szCode, strDecodePass + i * 3);
        szCode[3] = 0;
        int nCode = atoi(szCode);
        nCode = 999 - nCode;
        sprintf(szEncode, "%c", nCode);
        strcat(strPass, szEncode);
    }

    strcpy(szPassword, strPass);
    return szPassword;
};

int main(int argc, char **argv)
{
    printf(
        PasswordDecode(argv[1])
    );

    return 0;
}

To test if your Encode function is correct, the following plain text passwords and their encoded equivalent.

babble
901902901901891898


anus
902889882884


abcdefghijklmnopqrstuvwxyz1234567890
902901900899898897896895894893892891890889888887886885884883882881880879878877950949948947946945944943942951

Blog

[C language] Can you write a string encode function based on this simple decode function?

Jochem Stoel

Join Our Newsletter. No Spam, Only the good stuff.

Related