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  1. /*
  2.     This file is part of "Filter Foundry", a filter plugin for Adobe Photoshop
  3.     Copyright (C) 2003-2009 Toby Thain, toby@telegraphics.com.au
  4.     Copyright (C) 2018-2021 Daniel Marschall, ViaThinkSoft
  5.  
  6.     This program is free software; you can redistribute it and/or modify
  7.     it under the terms of the GNU General Public License as published by
  8.     the Free Software Foundation; either version 2 of the License, or
  9.     (at your option) any later version.
  10.  
  11.     This program is distributed in the hope that it will be useful,
  12.     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14.     GNU General Public License for more details.
  15.  
  16.     You should have received a copy of the GNU General Public License
  17.     along with this program; if not, write to the Free Software
  18.     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19. */
  20.  
  21. #include "ff.h"
  22.  
  23. #include "file_compat.h"
  24.  
  25. #include <string.h>
  26.  
  27. static UINT16 parm_id;
  28.  
  29. static BOOL CALLBACK enumnames(HMODULE hModule,LPCTSTR lpszType,
  30.                                LPTSTR lpszName,LONG_PTR lParam)
  31. {
  32.         if (IS_INTRESOURCE(lpszName)) {
  33.                 parm_id = (UINT16)((intptr_t)lpszName & 0xFFFF);
  34.                 return false; // we only want the first one
  35.         }
  36.         else return true;
  37. }
  38.  
  39. Boolean readPARMresource(HMODULE hm,char **reason,int readobfusc){
  40.         HRSRC resinfo;
  41.         HANDLE h;
  42.         Ptr pparm;
  43.         int res = false;
  44.  
  45.         parm_id = 1;
  46.         EnumResourceNames(hm,PARM_TYPE,enumnames,0); // callback function enumnames() will find the actual found parm_id
  47.  
  48.         // load first PARM resource
  49.         if( (resinfo = FindResource(hm,MAKEINTRESOURCE(parm_id),PARM_TYPE)) ){
  50.                 if ((h = LoadResource(hm, resinfo)) && (pparm = (Ptr)LockResource(h))) {
  51.                         res = readPARM(pparm, &gdata->parm, reason, 1 /*Windows format resource*/);
  52.                         gdata->obfusc = false;
  53.                 }
  54.         }else if( readobfusc &&
  55.                   ((resinfo = FindResource(hm,OBFUSCDATA_ID_NEW,OBFUSCDATA_TYPE_NEW)) ||
  56.                   (resinfo = FindResource(hm,OBFUSCDATA_ID_OLD,OBFUSCDATA_TYPE_OLD))) ){
  57.                 if( (h = LoadResource(hm,resinfo)) && (pparm = (Ptr)LockResource(h)) ){
  58.                         // Fix by DM, 18 Dec 2018:
  59.                         // We need to copy the information, because the resource data is read-only
  60.                         DWORD resSize = SizeofResource(hm,resinfo);
  61.                         if (resSize == sizeof(PARM_T)) {
  62.                                 PARM_T* copy = (PARM_T*)malloc(resSize);
  63.                                 if (!copy) return false;
  64.                                 memcpy(copy, pparm, resSize);
  65.                                 deobfusc(copy);
  66.                                 res = readPARM((Ptr)copy,&gdata->parm,reason,1);
  67.                                 gdata->obfusc = true;
  68.                                 free(copy);
  69.                         } else {
  70.                                 // Obfuscationed PARM has wrong size. It is probably a file with different RCDATA
  71.                                 gdata->obfusc = false;
  72.                                 return false;
  73.                         }
  74.                 }
  75.         }
  76.         if (!res) {
  77.                 gdata->obfusc = false;
  78.         }
  79.         return res;
  80. }
  81.  
  82. Boolean loadfile(StandardFileReply *sfr,char **reason){
  83.         Boolean readok = false;
  84.         HMODULE hm;
  85.  
  86.         // First, try to read the file as AFS/PFF/TXT file
  87.         if( (readok = readfile_afs_pff(sfr,reason)) ){
  88.                 gdata->obfusc = false;
  89.                 gdata->parmloaded = false;
  90.         }
  91.  
  92.         // If that didn't work, try to load as Windows image file (Resource API for 8BF/PRM files)
  93.         if (!readok) {
  94.                 char name[MAX_PATH+1];
  95.                 if (hm = LoadLibraryEx(myp2cstrcpy(name,sfr->sfFile.name),NULL,LOAD_LIBRARY_AS_DATAFILE)) {
  96.                         if (readPARMresource(hm,reason,READ_OBFUSC)) {
  97.                                 if ((gdata->parm.cbSize != PARM_SIZE) && (gdata->parm.cbSize != PARM_SIZE_PREMIERE) && (gdata->parm.cbSize != PARM_SIG_MAC)) {
  98.                                         *reason = _strdup("Incompatible obfuscation.");
  99.                                         //gdata->parmloaded = false;
  100.                                         return false; // Stop! We know the issue now.
  101.                                 } else if (gdata->parm.iProtected) {
  102.                                         *reason = _strdup("The filter is protected.");
  103.                                         //gdata->parmloaded = false;
  104.                                         return false; // Stop! We know the issue now.
  105.                                 } else {
  106.                                         readok = gdata->parmloaded = true;
  107.                                 }
  108.                         }
  109.                         FreeLibrary(hm);
  110.                 }
  111.         }
  112.  
  113.         // Is it a "Filters Unlimited" filter? (Only partially compatible with Filter Factory!!!)
  114.         if (!readok) {
  115.                 if (readfile_ffx(sfr, reason)) {
  116.                         readok = gdata->parmloaded = true;
  117.                 }
  118.         }
  119.  
  120.         // Is it a "Filters Unlimited" filter? (Only partially compatible with Filter Factory!!!)
  121.         if (!readok) {
  122.                 if (readfile_picotxt(sfr, reason)) {
  123.                         readok = gdata->parmloaded = true;
  124.                 }
  125.         }
  126.  
  127.         // If nothing worked, we will try to find a PARM resource (MacOS plugin, or NE executable on Win64)
  128.         if (!readok) {
  129.                 if (readfile_8bf(sfr, reason)) {
  130.                         if (gdata->parm.iProtected) {
  131.                                 *reason = _strdup("The filter is protected.");
  132.                                 return false; // Stop! We know the issue now.
  133.                         }
  134.                         else {
  135.                                 readok = gdata->parmloaded = true;
  136.                         }
  137.                 }
  138.         }
  139.  
  140.         // Check if we had success
  141.         if (!readok) {
  142.                 *reason = _strdup("It is not a text parameter (AFS) file, nor a standalone Mac/PC filter made by Filter Factory/Filter Foundry.");
  143.         }
  144.  
  145.         return readok;
  146. }
  147.