Initial commit
This commit is contained in:
commit
f91f052c0b
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*.o
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laa_patcher
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*.exe
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laa_patcher: laa_patcher.c help.c patch.c
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gcc -o laa_patcher laa_patcher.c help.c patch.c
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# laa_patcher
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## Usage:
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`./laa_patcher win32pe.exe`
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## What does it do?
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It's a simple C progam which patches existing Win32 PE binaries to be LARGE_ADDRESS_AWARE.
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## Why does it look so ugly? :tw-1f4a9:
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It's my first C program so don't judge :tw-1f61d:
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/*
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* help.c
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*
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* Copyright 2020 crt0mega <crt0mega@c-r-t.tk>
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*
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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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*
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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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*
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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., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*
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*/
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#include <stdio.h>
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void help()
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{
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printf("\nUsage:\nlaa_patcher <some.exe>\n"
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"This Program sets or unsets the LARGE_ADDRESS_AWARE flag on "
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"32 Bit PE Executables.\n");
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}
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/*
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* help.h
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*
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* Copyright 2020 crt0mega <crt0mega@c-r-t.tk>
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*
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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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*
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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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*
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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., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*
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*/
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void help();
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/*
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* laa_patcher.c
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*
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* Copyright 2020 crt0mega <crt0mega@c-r-t.tk>
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*
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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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*
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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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*
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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., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*
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*/
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#include <stdio.h>
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#include <stdbool.h>
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#include <string.h>
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#include "help.h"
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#include "patch.h"
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#define VERSION 0.1
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int main(int argc, char **argv)
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{
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// Introduce yerself
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printf("laa_patcher v%g (c) 2020 by crt0mega\n", VERSION, argc);
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if (argc == 1)
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{
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help();
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return 0;
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}
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char filename[strlen(argv[1])];
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strcpy(filename, argv[1]);
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printf("\nPatching %s ...\n", filename);
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if (ispe(filename))
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{
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printf("- %s is a PE binary...\n", filename);
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}
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else
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{
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printf("- %s is no PE binary, aborting.\n", filename);
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return 1;
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}
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if (ispatched(filename))
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{
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printf("- %s is already aware of large addresses, unpatching.\n", filename);
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//return 1;
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}
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// Let's get busy
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bool success;
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success = patch(filename);
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if (success == true)
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{
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printf("- %s successfully patched.\n", filename);
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return 0;
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}
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else
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{
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printf("- Error while patching %s.\n", filename);
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return 1;
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}
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}
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[editor]
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line_wrapping=false
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line_break_column=72
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auto_continue_multiline=true
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[file_prefs]
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final_new_line=true
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ensure_convert_new_lines=false
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strip_trailing_spaces=false
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replace_tabs=false
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[indentation]
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indent_width=4
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indent_type=1
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indent_hard_tab_width=8
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detect_indent=false
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detect_indent_width=false
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indent_mode=2
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[project]
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name=laa_patcher
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base_path=/home/crt0mega/Projekte/laa_patcher/
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description=
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file_patterns=
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[long line marker]
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long_line_behaviour=1
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long_line_column=72
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[files]
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current_page=0
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FILE_NAME_0=853;C;0;EUTF-8;1;1;0;%2Fhome%2Fcrt0mega%2FProjekte%2Flaa_patcher%2Flaa_patcher.c;0;4
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[VTE]
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last_dir=/home/crt0mega
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[build-menu]
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EX_00_LB=_Execute
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EX_00_CM="./%e"
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EX_00_WD=
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/*
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* patch.c
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*
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* Copyright 2020 crt0mega <crt0mega@c-r-t.tk>
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*
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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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*
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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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*
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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., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*
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*/
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdint.h>
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#define IS_LAA 0x0020
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bool ispe(char *filename)
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{
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FILE *pFile;
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int16_t header;
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int32_t peloc;
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int32_t peheader;
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pFile = fopen(filename, "rb");
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fread(&header, sizeof(header), 1, pFile);
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if (header != 0x5a4d) //Check presence of MZ magic bytes
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{
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fclose(pFile);
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return false;
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}
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fseek(pFile, 0x3c, SEEK_SET);
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fread(&peloc, sizeof(peloc), 1, pFile); //Get PE header location
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fseek(pFile, peloc, SEEK_SET);
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fread(&peheader, sizeof(peheader), 1, pFile);
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if (peheader != 0x4550) // Check presence of PE magic bytes
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{
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fclose(pFile);
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return false;
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}
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fclose(pFile);
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return true;
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}
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bool ispatched(char *filename)
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{
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FILE *pFile;
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int32_t peloc;
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int32_t peheader;
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int16_t laa;
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if (!ispe(filename))
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{
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printf("How did we even get here?!");
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return false;
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}
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pFile = fopen(filename, "rb");
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fseek(pFile, 0x3c, SEEK_SET);
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fread(&peloc, sizeof(peloc), 1, pFile);
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fseek(pFile, peloc, SEEK_SET); // Seek to PE Location and
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fread(&peheader, sizeof(peheader), 1, pFile); // Fetch header
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if (peheader != 0x4550)
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{
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printf("How the hell did we even geht here?!");
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return false;
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}
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fseek(pFile, 0x12, SEEK_CUR); // Seek to characteristics
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fread(&laa, sizeof(laa), 1, pFile); // Read characteristics
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fclose(pFile);
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if ((laa & IS_LAA) == IS_LAA)
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{
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return true;
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}
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return false;
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}
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bool patch(char *filename)
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{
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FILE *pFile;
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int32_t peloc;
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int32_t peheader;
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int16_t laa;
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if (!ispe(filename))
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{
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printf("How did we even get here?!\n");
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return false;
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}
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pFile = fopen(filename, "r+b");
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fseek(pFile, 0x3c, SEEK_SET);
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fread(&peloc, sizeof(peloc), 1, pFile);
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fseek(pFile, peloc, SEEK_SET); // Seek to PE Location and
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fread(&peheader, sizeof(peheader), 1, pFile); // Fetch header
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if (peheader != 0x4550)
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{
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printf("How the hell did we even geht here?!\n");
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return false;
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}
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fseek(pFile, 0x12, SEEK_CUR); // Seek to characteristics
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fread(&laa, sizeof(laa), 1, pFile); // Read characteristics
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int16_t setlaa;
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if ((laa & IS_LAA) == IS_LAA)
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{
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setlaa=laa&~IS_LAA;
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}
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else
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{
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setlaa=laa|IS_LAA;
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}
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fseek(pFile, -sizeof(laa), SEEK_CUR); // Seek back
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fwrite(&setlaa, 1, sizeof(setlaa), pFile); // Write new value
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fclose(pFile);
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return true;
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}
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@ -0,0 +1,28 @@
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/*
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||||||
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* patch.h
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||||||
|
*
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||||||
|
* Copyright 2020 crt0mega <crt0mega@c-r-t.tk>
|
||||||
|
*
|
||||||
|
* 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., 51 Franklin Street, Fifth Floor, Boston,
|
||||||
|
* MA 02110-1301, USA.
|
||||||
|
*
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <stdbool.h>
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|
||||||
|
int patch(char *filename);
|
||||||
|
bool ispe(char *filename);
|
||||||
|
bool ispatched(char *filename);
|
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