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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.  
  37. Boolean readPARMresource(HMODULE hm,char **reason,int readobfusc){
  38.         HRSRC resinfo;
  39.         HANDLE h;
  40.         Ptr pparm;
  41.         int res = false;
  42.  
  43.         parm_id = PARM_ID;
  44.         EnumResourceNames(hm,"PARM",enumnames,0);
  45.  
  46.         // load first PARM resource
  47.         if( (resinfo = FindResource(hm,MAKEINTRESOURCE(parm_id),"PARM")) ){
  48.                 if ((h = LoadResource(hm, resinfo)) && (pparm = (Ptr)LockResource(h))) {
  49.                         res = readPARM(pparm, &gdata->parm, reason, 1 /*Windows format resource*/);
  50.                         gdata->obfusc = false;
  51.                 }
  52.         }else if( readobfusc && (resinfo = FindResource(hm,MAKEINTRESOURCE(OBFUSCDATA_ID),RT_RCDATA)) ){
  53.                 if( (h = LoadResource(hm,resinfo)) && (pparm = (Ptr)LockResource(h)) ){
  54.                         // Fix by DM, 18 Dec 2018:
  55.                         // We need to copy the information, because the resource data is read-only
  56.                         DWORD resSize = SizeofResource(hm,resinfo);
  57.                         char* copy = (char*)malloc(resSize);
  58.                         if (!copy) return false;
  59.                         memcpy(copy, pparm, resSize);
  60.                         deobfusc((unsigned char*)copy, resSize,OBFUSC_SEED_POS);
  61.                         res = readPARM(copy,&gdata->parm,reason,1);
  62.                         gdata->obfusc = true;
  63.                         free(copy);
  64.                 }
  65.         }
  66.         if (!res) {
  67.                 gdata->obfusc = false;
  68.         }
  69.         return res;
  70. }
  71.  
  72. Boolean loadfile(StandardFileReply *sfr,char **reason){
  73.         Boolean readok = false;
  74.         HMODULE hm;
  75.  
  76.         // First, try to read the file as AFS/PFF/TXT file
  77.         if( (readok = readfile(sfr,reason)) ){
  78.                 gdata->obfusc = false;
  79.                 gdata->parmloaded = false;
  80.         }
  81.  
  82.         // If that didn't work, try to load as Windows image file (Resource API for 8BF/PRM files)
  83.         if (!readok) {
  84.                 char name[MAX_PATH+1];
  85.                 if (hm = LoadLibraryEx(myp2cstrcpy(name,sfr->sfFile.name),NULL,LOAD_LIBRARY_AS_DATAFILE)) {
  86.                         if (readPARMresource(hm,reason,READ_OBFUSC)) {
  87.                                 if ((gdata->parm.cbSize != PARM_SIZE) && (gdata->parm.cbSize != PARM_SIZE_PREMIERE) && (gdata->parm.cbSize != PARM_SIG_MAC)) {
  88.                                         *reason = _strdup("Incompatible obfuscation.");
  89.                                         return false; // Stop! We know the issue now.
  90.                                 } else if (gdata->parm.iProtected) {
  91.                                         *reason = _strdup("The filter is protected.");
  92.                                         return false; // Stop! We know the issue now.
  93.                                 } else {
  94.                                         readok = gdata->parmloaded = true;
  95.                                 }
  96.                         }
  97.                         FreeLibrary(hm);
  98.                 }
  99.         }
  100.  
  101.         // If nothing worked, we will try to find a PARM resource (MacOS plugin, or NE executable on Win64)
  102.         if (!readok) {
  103.                 if (read8bfplugin(sfr, reason)) {
  104.                         if (gdata->parm.iProtected) {
  105.                                 *reason = _strdup("The filter is protected.");
  106.                                 return false; // Stop! We know the issue now.
  107.                         }
  108.                         else {
  109.                                 readok = gdata->parmloaded = true;
  110.                         }
  111.                 }
  112.         }
  113.  
  114.         // Check if we had success
  115.         if (!readok) {
  116.                 *reason = _strdup("It is not a text parameter (AFS) file, nor a standalone Mac/PC filter made by Filter Factory/Filter Foundry.");
  117.         }
  118.  
  119.         return readok;
  120. }
  121.