Dogcows Code - chaz/thecheat/blob - main.m

   1
   2 /*
   3  * The Cheat - The legendary universal game trainer for Mac OS X.
   4  * http://www.brokenzipper.com/trac/wiki/TheCheat
   5  *
   6  * Copyright (c) 2003-2011, Charles McGarvey et al.
   7  *
   8  * Distributable under the terms and conditions of the 2-clause BSD
   9  * license; see the file COPYING for the legal text of the license.
  10  */
  11
  12 #import <Cocoa/Cocoa.h>
  13 #import <Foundation/foundation.h>
  14 #import <SecurityFoundation/SFAuthorization.h>
  15 #import <Security/AuthorizationTags.h>
  16 #include "ChazLog.h"
  17 #include <sys/types.h>
  18 #include <sys/uio.h>
  19 #include <unistd.h>
  20
  21
  22 /*
  23  * I think this function was ripped from the iHaxGamez project, so it
  24  * remains licensed under the GPL.
  25  */
  26 void authMe(char * FullPathToMe)
  27 {
  28         // get authorization as root
  29
  30         OSStatus myStatus;
  31
  32         // set up Authorization Item
  33         AuthorizationItem myItems[1];
  34         myItems[0].name = kAuthorizationRightExecute;
  35         myItems[0].valueLength = 0;
  36         myItems[0].value = NULL;
  37         myItems[0].flags = 0;
  38
  39         // Set up Authorization Rights
  40         AuthorizationRights myRights;
  41         myRights.count = sizeof (myItems) / sizeof (myItems[0]);
  42         myRights.items = myItems;
  43
  44         // set up Authorization Flags
  45         AuthorizationFlags myFlags;
  46         myFlags =
  47                 kAuthorizationFlagDefaults |
  48                 kAuthorizationFlagInteractionAllowed |
  49                 kAuthorizationFlagExtendRights;
  50
  51         // Create an Authorization Ref using Objects above. NOTE: Login bod comes up with this call.
  52         AuthorizationRef myAuthorizationRef;
  53         myStatus = AuthorizationCreate (&myRights, kAuthorizationEmptyEnvironment, myFlags, &myAuthorizationRef);
  54
  55         if (myStatus == errAuthorizationSuccess)
  56         {
  57                 // prepare communication path - used to signal that process is loaded
  58                 FILE *myCommunicationsPipe = NULL;
  59                 char myReadBuffer[] = " ";
  60
  61                 // run this app in GOD mode by passing authorization ref and comm pipe (asynchoronous call to external application)
  62                 myStatus = AuthorizationExecuteWithPrivileges(myAuthorizationRef,FullPathToMe,kAuthorizationFlagDefaults,nil,&myCommunicationsPipe);
  63
  64                 // external app is running asynchronously - it will send to stdout when loaded
  65                 if (myStatus == errAuthorizationSuccess)
  66                 {
  67                         read (fileno (myCommunicationsPipe), myReadBuffer, sizeof (myReadBuffer));
  68                         fclose(myCommunicationsPipe);
  69                 }
  70
  71                 // release authorization reference
  72                 myStatus = AuthorizationFree (myAuthorizationRef, kAuthorizationFlagDestroyRights);
  73         }
  74 }
  75
  76 /*
  77  * I think this function was ripped from the iHaxGamez project, so it
  78  * remains licensed under the GPL.
  79  */
  80 bool checkExecutablePermissions(void)
  81 {
  82         NSDictionary    *applicationAttributes = [[NSFileManager defaultManager] fileAttributesAtPath:[[NSBundle mainBundle] executablePath] traverseLink: YES];
  83
  84         // We expect 2755 as octal (1517 as decimal, -rwxr-sr-x as extended notation)
  85         return ([applicationAttributes filePosixPermissions] == 1517 && [[applicationAttributes fileGroupOwnerAccountName] isEqualToString: @"procmod"]);
  86 }
  87
  88 /*
  89  * I think this function was ripped from the iHaxGamez project, so it
  90  * remains licensed under the GPL.
  91  */
  92 bool amIWorthy(void)
  93 {
  94         // running as root?
  95         AuthorizationRef myAuthRef;
  96         OSStatus stat = AuthorizationCopyPrivilegedReference(&myAuthRef,kAuthorizationFlagDefaults);
  97
  98         return stat == errAuthorizationSuccess || checkExecutablePermissions();
  99 }
 100
 101 int main( int argc, char *argv[] )
 102 {
 103         NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
 104
 105         ChazLogDisable();
 106
 107         ChazDebugSetup();
 108         ChazMapLogToDebug();
 109
 110 #ifdef __ppc__
 111         // PPC machines whose operating system is below leopard do not need authorization
 112         SInt32 osxMajorVersion;
 113         Gestalt(gestaltSystemVersionMinor, &osxMajorVersion);
 114         if (osxMajorVersion < 5)
 115         {
 116                 [pool release];
 117                 return NSApplicationMain(argc,  (const char **) argv);
 118         }
 119 #endif
 120
 121         if (amIWorthy())
 122         {
 123 #ifndef _DEBUG
 124                 printf("Don't forget to flush! ;-) "); // signal back to close caller
 125 #endif
 126                 fflush(stdout);
 127
 128                 [pool release];
 129                 return NSApplicationMain(argc,  (const char **) argv);
 130         }
 131         else
 132         {
 133                 authMe(argv[0]);
 134                 [pool release];
 135                 return 0;
 136         }
 137
 138         ChazDebugCleanup();
 139 }