Subversion Repositories filter_foundry

/*

        This file is part of "Filter Foundry", a filter plugin for Adobe Photoshop

        Copyright (C) 2003-2009 Toby Thain, toby@telegraphics.com.au

        Copyright (C) 2018-2021 Daniel Marschall, ViaThinkSoft

        This program is free software; you can redistribute it and/or modify

        it under the terms of the GNU General Public License as published by

        the Free Software Foundation; either version 2 of the License, or

        (at your option) any later version.

        This program is distributed in the hope that it will be useful,

        but WITHOUT ANY WARRANTY; without even the implied warranty of

        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License

        along with this program; if not, write to the Free Software

        Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

#include "ff.h"

#include "file_compat.h"

#include <string.h>

static UINT16 parm_id;

static BOOL CALLBACK enumnames(HMODULE hModule, LPCTSTR lpszType,

        LPTSTR lpszName, LONG_PTR lParam)

{

        if (IS_INTRESOURCE(lpszName)) {

                parm_id = (UINT16)((intptr_t)lpszName & 0xFFFF);

                return false; // we only want the first one

        }

        else return true;

}

Boolean readPARMresource(HMODULE hm, char** reason, int readobfusc) {

        HRSRC resinfo;

        HANDLE h;

        Ptr pparm;

        parm_id = 1;

        EnumResourceNames(hm, PARM_TYPE, enumnames, 0); // callback function enumnames() will find the actual found parm_id

        // load first PARM resource

        if ((resinfo = FindResource(hm, MAKEINTRESOURCE(parm_id), PARM_TYPE))) {

                if ((h = LoadResource(hm, resinfo)) && (pparm = (Ptr)LockResource(h))) {

                        int res = readPARM(&gdata->parm, pparm);

                        gdata->obfusc = false;

                        return res;

                }

        }

        else if (readobfusc &&

                ((resinfo = FindResource(hm, OBFUSCDATA_ID_NEW, OBFUSCDATA_TYPE_NEW)) ||

                        (resinfo = FindResource(hm, OBFUSCDATA_ID_OLD, OBFUSCDATA_TYPE_OLD)))) {

                if ((h = LoadResource(hm, resinfo)) && (pparm = (Ptr)LockResource(h))) {

                        // Fix by DM, 18 Dec 2018:

                        // We need to copy the information, because the resource data is read-only

                        DWORD resSize = SizeofResource(hm, resinfo);

                        if (resSize == sizeof(PARM_T)) {

                                int res;

                                PARM_T* copy = (PARM_T*)malloc(resSize);

                                if (!copy) return false;

                                memcpy(copy, pparm, resSize);

                                deobfusc(copy);

                                res = readPARM(&gdata->parm, (Ptr)copy);

                                if (!res) {

                                        *reason = _strdup("Incompatible obfuscation.");

                                }

                                free(copy);

                                gdata->obfusc = true;

                                return res;

                        }

                        else {

                                // Obfuscationed PARM has wrong size. It is probably a file with different RCDATA

                                gdata->obfusc = false;

                                return false;

                        }

                }

        }

        return false;

}

Boolean loadfile(StandardFileReply* sfr, char** reason) {

        HMODULE hm;

        // The different read-functions will return true if the resource was successfully loaded,

        // or false otherwise. If *reason is set, then the answer is clearly "No". If the result

        // is just false, it means that the program should continue with the next read-function.

        *reason = NULL;

        // First, try to read the file as AFS/PFF/TXT file

        if (*reason == NULL) {

                if (readfile_afs_pff(sfr, reason)) {

                        gdata->obfusc = false;

                        gdata->parmloaded = false;

                        return true;

                }

        }

        // If that didn't work, try to load as Windows image file (Resource API for 8BF/PRM files)

        if (*reason == NULL) {

                char name[MAX_PATH + 1];

                if (hm = LoadLibraryEx(myp2cstrcpy(name, sfr->sfFile.name), NULL, LOAD_LIBRARY_AS_DATAFILE)) {

                        if (readPARMresource(hm, reason, READ_OBFUSC)) {

                                if (gdata->parm.iProtected) {

                                        *reason = _strdup("The filter is protected.");

                                        //gdata->parmloaded = false;

                                }

                                else {

                                        gdata->parmloaded = true;

                                        FreeLibrary(hm);

                                        return true;

                                }

                        }

                        FreeLibrary(hm);

                }

        }

        // Is it a "Filters Unlimited" filter? (Only partially compatible with Filter Factory!!!)

        if (*reason == NULL) {

                if (readfile_ffx(sfr, reason)) {

                        gdata->parmloaded = true;

                        return true;

                }

        }

        // Is it a "Filters Unlimited" filter? (Only partially compatible with Filter Factory!!!)

        if (*reason == NULL) {

                if (readfile_picotxt(sfr, reason)) {

                        gdata->parmloaded = true;

                        return true;

                }

        }

        // If nothing worked, we will try to find a PARM resource (MacOS plugin, or 64 bit 8BF on Win32 OS)

        // Note that we cannot detect obfuscated filters here!

        if (*reason == NULL) {

                if (readfile_8bf(sfr, reason)) {

                        if (gdata->parm.iProtected) {

                                // This is for purely protected filters before the time when obfuscation and protection was merged

                                *reason = _strdup("The filter is protected.");

                        }

                        else {

                                gdata->parmloaded = true;

                                return true;

                        }

                }

        }

        // We didn't had success. If we have a clear reason, return false and the reason.

        // If we don't have a clear reason, set a generic reason and return false.

        if (*reason == NULL) {

                *reason = _strdup("It is not a text parameter file, nor a standalone Mac/PC filter created by Filter Factory/Filter Foundry.");

        }

        return false;

}