├── .gitignore ├── FUNDING.yml ├── LICENSE ├── Readme.md ├── Readme.org ├── debug.gd ├── obfuscate.py └── obfuscator ├── __init__.py ├── obfuscate.py ├── parser ├── LICENSE.txt ├── Readme.org ├── __init__.py ├── gdscript.lark └── parser.py └── reconstruct.py /.gitignore: -------------------------------------------------------------------------------- 1 | .DS_Store 2 | .idea 3 | *.log 4 | tmp/ 5 | 6 | *.py[cod] 7 | *.egg 8 | build 9 | htmlcov 10 | __pycache__ 11 | -------------------------------------------------------------------------------- /FUNDING.yml: -------------------------------------------------------------------------------- 1 | github: tavurth 2 | patreon: tavurth 3 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /Readme.md: -------------------------------------------------------------------------------- 1 | 2 | # Table of Contents 3 | 4 | 1. [Usage](#org643df87) 5 | 1. [‼ Use this at your own risk ‼](#orgbe5b6ba) 6 | 2. [Dependencies](#orge2a7935) 7 | 3. [Running the obfuscator](#org8a51fc6) 8 | 4. [# no-mangle](#org9a38cdb) 9 | 5. [Examples](#org723a10b) 10 | 1. [Before](#orge4801dd) 11 | 2. [After](#org8379ffe) 12 | 2. [Support](#org734f3f2) 13 | 14 | 15 | 16 | 17 | 18 | # Usage 19 | 20 | 21 | This project was not really ready for production use and was more used as a way to show what might be possible. 22 | 23 | The proposal to read if you find this repository interesting: 24 | https://github.com/godotengine/godot-proposals/issues/4220 25 | 26 | Please do not attempt to use this to mangle your project files 🙏 27 | 28 | 29 | 30 | 31 | 32 | ## ‼ Use this at your own risk ‼ 33 | 34 | This is very early work and this will mess up your game if you don’t have a git backup. 35 | 36 | Currently not production ready, built more as an example of what we could do for GDScript obfuscation 37 | 38 | 39 | 40 | 41 | ## Dependencies 42 | 43 | This currently uses `pt` ([platinum-searcher](https://github.com/monochromegane/the_platinum_searcher)) for quickly finding all of the references in the project. 44 | In the future we will probably move this to pure python. 45 | 46 | 47 | 48 | 49 | ## Running the obfuscator 50 | 51 | 1. Put this script in your game directory 52 | 2. Ensure `DRY_RUN` is `True` at the top of the file (only `prints` changes) 53 | 3. `python3 obfuscator.py` 54 | 55 | 56 | 57 | 58 | ## # no-mangle 59 | 60 | Currently `# no-mangle` keyword is supported only for function names 61 | 62 | func my_function(): # no-mangle 63 | pass 64 | 65 | Which will keep the name of the function intact 66 | 67 | 68 | 69 | 70 | ## Examples 71 | 72 | 73 | 74 | 75 | ### Before 76 | 77 | ![img](https://user-images.githubusercontent.com/100964/158587446-158ce369-cb4a-45ce-b8cd-7329df61e0df.png) 78 | 79 | 80 | 81 | 82 | ### After 83 | 84 | ![img](https://user-images.githubusercontent.com/100964/158587624-b473b637-b3b2-4dd9-93dd-d725d48d1491.png) 85 | 86 | 87 | 88 | 89 | # Support 90 | 91 | Currently this is something that I will work on when I have some free time. If you like this project and want me to work on it more, consider buying me a coffee ☕️ 92 | 93 | Buy Me A Coffee 94 | 95 | -------------------------------------------------------------------------------- /Readme.org: -------------------------------------------------------------------------------- 1 | #+TITLE: Godot GDScript Obfuscator 2 | 3 | * Usage 4 | 5 | ** ‼ Use this at your own risk ‼ 6 | 7 | This is very early work and this will mess up your game if you don't have a git backup. 8 | 9 | Currently not production ready, built more as an example of what we could do for GDScript obfuscation 10 | 11 | ** Dependencies 12 | 13 | This currently uses ~pt~ ([[https://github.com/monochromegane/the_platinum_searcher][platinum-searcher]]) for quickly finding all of the references in the project. 14 | In the future we will probably move this to pure python. 15 | 16 | ** Running the obfuscator 17 | 18 | 1. Put this script in your game directory 19 | 2. Ensure ~DRY_RUN~ is ~True~ at the top of the file (only ~prints~ changes) 20 | 3. ~python3 obfuscator.py~ 21 | 22 | ** # no-mangle 23 | 24 | Currently ~# no-mangle~ keyword is supported only for function names 25 | 26 | #+begin_src gdscript 27 | func my_function(): # no-mangle 28 | pass 29 | #+end_src 30 | 31 | Which will keep the name of the function intact 32 | 33 | ** Examples 34 | 35 | *** Before 36 | [[https://user-images.githubusercontent.com/100964/158587446-158ce369-cb4a-45ce-b8cd-7329df61e0df.png]] 37 | 38 | *** After 39 | [[https://user-images.githubusercontent.com/100964/158587624-b473b637-b3b2-4dd9-93dd-d725d48d1491.png]] 40 | 41 | * Support 42 | 43 | Currently this is something that I will work on when I have some free time. If you like this project and want me to work on it more, consider buying me a coffee ☕️ 44 | 45 | @@html:Buy Me A Coffee 46 | -------------------------------------------------------------------------------- /debug.gd: -------------------------------------------------------------------------------- 1 | tool 2 | extends Node 3 | 4 | func _input(event: InputEvent): 5 | if not event is InputEventKey: 6 | return 7 | if not event.pressed: 8 | return 9 | 10 | if event.is_action_pressed("debug_orphans"): 11 | print_stray_nodes() 12 | 13 | 14 | func test(): 15 | """ 16 | This is a header comment 17 | This is a header comment 18 | This is a header comment 19 | """ 20 | 21 | # 22 | # This is a comment 23 | ## This is a comment 24 | var a = 5 25 | if a > 5: 26 | print("HERE") 27 | else: 28 | print("NOT HERE") 29 | 30 | while true: 31 | if a > 5: 32 | continue 33 | 34 | 35 | match a: 36 | 5: 37 | print("HERE") 38 | 10: 39 | print("Not HERE") 40 | _: 41 | print("Not HERE") 42 | 43 | a = 10 44 | -------------------------------------------------------------------------------- /obfuscate.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | 3 | from obfuscator import obfuscate 4 | 5 | if __name__ == "__main__": 6 | obfuscate() 7 | -------------------------------------------------------------------------------- /obfuscator/__init__.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | 3 | from .obfuscate import obfuscate 4 | -------------------------------------------------------------------------------- /obfuscator/obfuscate.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | 3 | import os 4 | import re 5 | from lark import Tree, Token 6 | from .parser import parser 7 | from .reconstruct import reconstruct 8 | 9 | DRY_RUN = True 10 | 11 | EXCLUDED_FILES = [os.path.basename(__file__)] 12 | EXCLUDED_TOKENS = [ 13 | "_process", 14 | "_physics_process", 15 | "_ready", 16 | "_init", 17 | "_enter_tree", 18 | "_exit_tree", 19 | "_notification", 20 | "translated", 21 | "rotated", 22 | "basis", 23 | ] 24 | 25 | 26 | def find(to_search: str, only_files=True): 27 | to_ignore = " --ignore ".join([""] + EXCLUDED_FILES) 28 | to_append = '"' 29 | 30 | if only_files: 31 | to_append += " --files-with-matches" 32 | 33 | return ( 34 | os.popen( 35 | 'pt --ignore "*.gltf" --nonumbers --nocolor --nogroup ' 36 | + to_ignore 37 | + ' -e "' 38 | + to_search 39 | + to_append 40 | ) 41 | .read() 42 | .split("\n") 43 | ) 44 | 45 | 46 | def find_all_gdscript_files(): 47 | to_return = find("(func |var | const | class )") 48 | return [i for i in to_return if ".gd" in i] 49 | 50 | 51 | def mangle(result: Tree): 52 | """ 53 | Take in a lark tree and iterate through each 54 | name (function or variable) mangling them in turn 55 | """ 56 | return result 57 | 58 | 59 | def obfuscate(): 60 | for filename in find_all_gdscript_files(): 61 | with open(filename, "r") as fin: 62 | file_data = fin.read() 63 | 64 | result = parser.parse(file_data) 65 | result = mangle(result) 66 | result = reconstruct(file_data, result) 67 | 68 | print(result) 69 | -------------------------------------------------------------------------------- /obfuscator/parser/LICENSE.txt: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2019 Pawel Lampe 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /obfuscator/parser/Readme.org: -------------------------------------------------------------------------------- 1 | #+TITLE: Readme 2 | 3 | 4 | Files in this folder were originally found in the [[https://github.com/Scony/godot-gdscript-toolkit][godot-gdscript-toolkit]] repository. 5 | 6 | I have modified the sources, but their license remains intact and applies to only this subfolder. 7 | -------------------------------------------------------------------------------- /obfuscator/parser/__init__.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | 3 | from .parser import parser # noqa: F401 4 | -------------------------------------------------------------------------------- /obfuscator/parser/gdscript.lark: -------------------------------------------------------------------------------- 1 | start: _class_stmt+ 2 | 3 | _class_stmt: (_simple_class_stmt _NL) | compound_class_stmt | _NL 4 | _simple_class_stmt: single_class_stmt (";" single_class_stmt)* [";"] 5 | ?single_class_stmt: tool_stmt 6 | | pass_stmt 7 | | signal_stmt 8 | | extends 9 | | classname_stmt 10 | | class_var_stmt 11 | | const_stmt 12 | | export_stmt 13 | | onready_stmt 14 | | puppet_var_stmt 15 | | docstr_stmt 16 | | classname_extends 17 | ?compound_class_stmt: class_def 18 | | enum_def 19 | | "static" func_def -> static_func_def 20 | | "remote" func_def -> remote_func_def 21 | | "remotesync" func_def -> remotesync_func_def 22 | | "master" func_def -> master_func_def 23 | | "mastersync" func_def -> mastersync_func_def 24 | | "puppet" func_def -> puppet_func_def 25 | | "puppetsync" func_def -> puppetsync_func_def 26 | | "sync" func_def -> sync_func_def 27 | | func_def 28 | 29 | tool_stmt: "tool" 30 | signal_stmt: "signal" NAME ["(" [NAME ("," NAME)* [trailing_comma]] ")"] 31 | extends: "extends" (NAME | string) ("." NAME)* 32 | classname_stmt: "class_name" NAME ["," string] 33 | !classname_extends: "class_name" NAME ["," string] "extends" (NAME | string) ("." NAME)* 34 | export_stmt: export_inf | export_typed 35 | export_inf: "export" [(puppet|onready)] (var_assigned | var_typed | var_typed_assgnd | var_inf) [setget] 36 | export_typed: "export" "(" TYPE ("," expr)* ")" [(puppet|onready)] class_var_stmt 37 | class_var_stmt: _var_stmt [setget] 38 | _var_stmt: var_empty 39 | | var_assigned 40 | | var_typed 41 | | var_typed_assgnd 42 | | var_inf 43 | var_empty: "var" NAME 44 | var_assigned: "var" NAME "=" expr 45 | _var_typed: "var" NAME ":" TYPE 46 | var_typed: _var_typed 47 | var_typed_assgnd: _var_typed "=" expr 48 | var_inf: "var" NAME ":" "=" expr 49 | !setget: "setget" (NAME ["," NAME] | "," NAME) 50 | !const_stmt: "const" NAME [":" [TYPE]] "=" expr 51 | onready_stmt: "onready" class_var_stmt 52 | puppet_var_stmt: "puppet" class_var_stmt 53 | puppet: "puppet" 54 | onready: "onready" 55 | docstr_stmt: string 56 | 57 | class_def: "class" NAME [extends] ":" (_class_body | _class_stmt) 58 | _class_body: _NL _INDENT _class_stmt+ _DEDENT 59 | 60 | func_def: func_header _func_suite 61 | func_header: "func" NAME "(" [func_args] ")" ["." parent_call] ["->" TYPE] ":" 62 | parent_call: _call_arglist 63 | func_args: func_arg ("," func_arg)* 64 | ?func_arg: func_arg_regular 65 | | func_arg_inf 66 | | func_arg_typed 67 | func_arg_regular: ["var"] NAME ["=" expr] 68 | func_arg_inf: ["var"] NAME ":" "=" expr 69 | func_arg_typed: ["var"] NAME ":" TYPE ["=" expr] 70 | _func_suite: _func_body 71 | | _func_stmt 72 | _func_body: _NL _INDENT _func_stmt+ _DEDENT 73 | _func_stmt: (_simple_func_stmt _NL) | compound_func_stmt 74 | _simple_func_stmt: single_func_stmt (";" single_func_stmt)* [";"] 75 | ?single_func_stmt: pass_stmt 76 | | return_stmt 77 | | func_var_stmt 78 | | break_stmt 79 | | continue 80 | | expression 81 | ?compound_func_stmt: if_stmt 82 | | while_stmt 83 | | for_stmt 84 | | match_stmt 85 | pass_stmt: "pass" 86 | return_stmt: "return" [expr] 87 | func_var_stmt: _var_stmt 88 | break_stmt.2: "break" 89 | continue.2: "continue" 90 | expression: expr 91 | if_stmt: if_branch (_NL? elif_branch)* [_NL? else_branch] 92 | if_branch: "if" expr ":" _func_suite 93 | elif_branch: "elif" expr ":" _func_suite 94 | else_branch: "else" ":" _func_suite 95 | while_stmt: "while" expr ":" _func_suite 96 | for_stmt: "for" NAME "in" expr ":" _func_suite 97 | match_stmt: "match" expr ":" _match_body 98 | _match_body: _NL _INDENT match_branch+ _DEDENT 99 | match_branch: pattern ":" _func_suite 100 | 101 | enum_def: (enum_regular | enum_named) _NL 102 | enum_regular: "enum" _enum_body 103 | enum_named: "enum" NAME _enum_body 104 | _enum_body: "{" [enum_element ("," enum_element)* [trailing_comma]] "}" 105 | enum_element: NAME ["=" test_expr] 106 | 107 | pattern: list_pattern 108 | ?list_pattern: test_pattern ("," test_pattern)* 109 | !?test_pattern: or_pattern ["if" or_pattern "else" test_pattern] 110 | !?or_pattern: and_pattern (("or" | "||") and_pattern)* 111 | !?and_pattern: not_pattern (("and" | "&&") not_pattern)* 112 | !?not_pattern: ("not" | "!") not_pattern | comp_pattern 113 | ?comp_pattern: bitw_or_pattern [_comp_op bitw_or_pattern] 114 | !?bitw_or_pattern: bitw_xor_pattern ("|" bitw_xor_pattern)* 115 | !?bitw_xor_pattern: bitw_and_pattern ("^" bitw_and_pattern)* 116 | !?bitw_and_pattern: shift_pattern ("&" shift_pattern)* 117 | !?shift_pattern: arith_pattern (("<<" | ">>") arith_pattern)* 118 | !?arith_pattern: mdr_pattern (("-" | "+") mdr_pattern)* 119 | !?mdr_pattern: neg_pattern (("*" | "/" | "%") neg_pattern)* 120 | !?neg_pattern: "-" neg_pattern 121 | | bitw_not_pattern 122 | !?bitw_not_pattern: "~" bitw_not_pattern 123 | | attr_pattern 124 | !?attr_pattern: atom_pattern ("." atom_pattern)* 125 | ?atom_pattern: "(" test_pattern ")" -> par_pattern 126 | | "var" NAME -> var_capture_pattern 127 | | ".." -> etc_pattern 128 | | "_" -> wildcard_pattern 129 | | array_pattern 130 | | dict_pattern 131 | | NAME 132 | | HEX 133 | | BIN 134 | | literal 135 | array_pattern: "[" [test_pattern ("," test_pattern)* [trailing_comma]] "]" 136 | dict_pattern: "{" [dict_pattern_element ("," dict_pattern_element)* [trailing_comma]] "}" 137 | ?dict_pattern_element: kv_pair_pattern 138 | | atom_pattern 139 | kv_pair_pattern: (c_dict_pattern_element | eq_dict_pattern_element) 140 | c_dict_pattern_element: test_pattern ":" test_pattern 141 | eq_dict_pattern_element: NAME "=" test_pattern 142 | 143 | expr: test_expr 144 | | assignment 145 | assignment: attr_expr _assnmnt_op test_expr 146 | !_assnmnt_op: "=" | "+=" | "-=" | "*=" | "/=" | "%=" | "&=" | "|=" | "^=" | ">>=" | "<<=" 147 | !?test_expr: or_test ["if" or_test "else" test_expr] 148 | !?or_test: and_test (("or" | "||") and_test)* 149 | !?and_test: not_test (("and" | "&&") not_test)* 150 | !?not_test: ("not" | "!") not_test | content_test 151 | !?content_test: comparison ("in" comparison)* 152 | ?comparison: bitw_or [_comp_op bitw_or] 153 | !_comp_op: ">" | "<" | "==" | "!=" | "<=" | ">=" 154 | !?bitw_or: bitw_xor ("|" bitw_xor)* 155 | !?bitw_xor: bitw_and ("^" bitw_and)* 156 | !?bitw_and: shift_expr ("&" shift_expr)* 157 | !?shift_expr: arith_expr (("<<" | ">>") arith_expr)* 158 | !?arith_expr: mdr_expr (("-" | "+") mdr_expr)* 159 | !?mdr_expr: neg_expr (("*" | "/" | "%") neg_expr)* 160 | !?neg_expr: "-" neg_expr 161 | | bitw_not 162 | !?bitw_not: "~" bitw_not 163 | | type_test 164 | !?type_test: type_cast ("is" type_cast)* 165 | !?type_cast: _call_expr ("as" TYPE)* // TODO: fix precedence (same as "is" probably(!)) 166 | _call_expr: standalone_call 167 | | getattr_call 168 | | attr_expr 169 | !standalone_call: ["."] NAME _call_arglist 170 | !getattr_call: getattr _call_arglist 171 | !_call_arglist: "(" [test_expr ("," test_expr)*] ")" 172 | !?attr_expr: getattr 173 | | subscr_expr 174 | getattr: _call_expr _attr+ 175 | !_attr: ("." NAME) 176 | ?subscr_expr: _call_expr "[" test_expr "]" 177 | | _plus_atom 178 | _plus_atom: ["+"] atom 179 | ?atom: "(" test_expr ")" -> par_expr 180 | | array 181 | | dict 182 | | NAME 183 | | HEX 184 | | BIN 185 | | literal 186 | ?literal: NUMBER 187 | | string 188 | | node_path 189 | | get_node 190 | HEX.2: /-?0x[a-fA-F0-9][a-fA-F0-9_]*/ 191 | BIN.2: /-?0b[01][01_]*/ 192 | node_path: "@" string 193 | get_node: "$" (path | string) 194 | path: NAME ("/" NAME)* 195 | array: "[" [test_expr ("," test_expr)* [trailing_comma]] "]" 196 | trailing_comma: "," 197 | dict: "{" [kv_pair ("," kv_pair)* [trailing_comma]] "}" 198 | kv_pair: (c_dict_element | eq_dict_element) 199 | c_dict_element: test_expr ":" test_expr 200 | eq_dict_element: NAME "=" test_expr 201 | 202 | TYPE: NAME ("." NAME)* 203 | NUMBER: ["+"|"-"] (FLOAT | INT) 204 | FLOAT: INT _EXP | DECIMAL _EXP? 205 | _EXP: ("e"|"E") SIGNED_INT 206 | SIGNED_INT: ["+"|"-"] INT 207 | DECIMAL: INT "." INT? | "." INT 208 | INT: DIGIT (DIGIT | "_")* 209 | DIGIT: "0".."9" 210 | 211 | string: LONG_STRING | REGULAR_STRING 212 | REGULAR_STRING: /("(?!"").*?(? NAME 227 | -------------------------------------------------------------------------------- /obfuscator/parser/parser.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | 3 | """ 4 | Initializes and caches the GDScript parsers, using Lark. 5 | Provides a function to parse GDScript code 6 | and to get an intermediate representation as a Lark Tree. 7 | """ 8 | import os 9 | import pickle 10 | import sys 11 | import pkg_resources 12 | 13 | from lark import Lark, Tree, indenter 14 | from lark.reconstruct import Reconstructor 15 | from lark.grammar import Rule 16 | from lark.lexer import TerminalDef 17 | 18 | 19 | class Indenter(indenter.Indenter): 20 | NL_type = "_NL" 21 | OPEN_PAREN_types = ["LPAR", "LSQB", "LBRACE"] 22 | CLOSE_PAREN_types = ["RPAR", "RSQB", "RBRACE"] 23 | INDENT_type = "_INDENT" 24 | DEDENT_type = "_DEDENT" 25 | # TODO: guess tab length 26 | tab_len = 4 27 | 28 | 29 | # When upgrading to Python 3.8, replace with functools.cached_property 30 | class cached_property: 31 | """A property that is only computed once per instance and then replaces 32 | itself with an ordinary attribute. Deleting the attribute resets the 33 | property. 34 | """ 35 | 36 | def __init__(self, func): 37 | self.__doc__ = func.__doc__ 38 | self.func = func 39 | 40 | def __get__(self, obj, cls): 41 | if obj is None: 42 | return self 43 | value = obj.__dict__[self.func.__name__] = self.func(obj) 44 | return value 45 | 46 | 47 | class Parser: 48 | """Parses GDScript code using lark parsers. 49 | The parsers are only created once, upon using them for the first time. 50 | """ 51 | 52 | def __init__(self): 53 | self._directory = os.path.dirname(__file__) 54 | self._use_grammar_cache = True 55 | 56 | def parse(self, code: str, gather_metadata: bool = False) -> Tree: 57 | """Parses GDScript code and returns an intermediate representation as a Lark Tree. 58 | If gather_metadata is True, parsing is slower but the returned Tree comes with 59 | line and column numbers for statements and rules. 60 | """ 61 | code += "\n" # to overcome lark bug (#489) 62 | return ( 63 | self._parser_with_metadata.parse(code) 64 | if gather_metadata 65 | else self._parser.parse(code) 66 | ) 67 | 68 | def _get_parser( 69 | self, 70 | name: str, 71 | add_metadata: bool = False, 72 | grammar_filename: str = "gdscript.lark", 73 | ) -> Tree: 74 | version: str = pkg_resources.get_distribution("gdtoolkit").version 75 | 76 | tree: Tree = None 77 | grammar_filepath: str = os.path.join(self._directory, grammar_filename) 78 | 79 | tree = Lark.open( 80 | grammar_filepath, 81 | parser="lalr", 82 | start="start", 83 | postlex=Indenter(), 84 | propagate_positions=add_metadata, 85 | maybe_placeholders=False, 86 | ) 87 | 88 | return tree 89 | 90 | @cached_property 91 | def _parser(self) -> Tree: 92 | return self._get_parser("parser") 93 | 94 | @cached_property 95 | def _parser_with_metadata(self) -> Tree: 96 | return self._get_parser("parser_with_metadata", add_metadata=True) 97 | 98 | @cached_property 99 | def _comment_parser(self) -> Tree: 100 | return self._get_parser( 101 | "parser_comments", add_metadata=True, grammar_filename="comments.lark" 102 | ) 103 | 104 | 105 | parser = Parser() 106 | -------------------------------------------------------------------------------- /obfuscator/reconstruct.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | 3 | import re 4 | from math import inf 5 | from lark import Tree, Token 6 | 7 | TAB_MATCHER = re.compile(r"(\t)+[a-zA-Z]") 8 | 9 | 10 | def join_children(tree: Tree, join_by: str): 11 | to_return = "" 12 | 13 | for child in tree.children: 14 | if isinstance(child, Tree): 15 | to_return += construct(child) + join_by 16 | 17 | else: 18 | to_return += child + join_by 19 | 20 | return to_return.rstrip(join_by) 21 | 22 | 23 | def process_extends(tree: Tree): 24 | return "extends " + construct(tree, max=1) + "\n" 25 | 26 | 27 | def process_func_def(tree: Tree): 28 | return "func " + construct(tree, stop=1) + construct(tree, start=1) 29 | 30 | 31 | def process_func_header(tree: Tree): 32 | if "func_args" not in tree.pretty(): 33 | return construct(tree, stop=1) + "():\n" 34 | 35 | return construct(tree, stop=1) + construct(tree) 36 | 37 | 38 | def process_func_args(tree: Tree): 39 | return "(" + construct(tree) + "):\n" 40 | 41 | 42 | def process_func_arg_typed(tree: Tree): 43 | return ",".join([i for i in tree.children if i.type == "NAME"]) 44 | 45 | 46 | def process_if_branch(tree: Tree): 47 | return construct(tree, stop=1) + ":\n" + construct(tree, start=1) 48 | 49 | 50 | def process_if_stmt(tree: Tree): 51 | return "if " + construct(tree) 52 | 53 | 54 | def process_expr(tree: Tree): 55 | return construct(tree) 56 | 57 | 58 | def process_not_test(tree: Tree): 59 | return "not " + construct(tree, start=1) 60 | 61 | 62 | def process_type_test(tree: Tree): 63 | return join_children(tree, " ") 64 | 65 | 66 | def process_return_stmt(tree: Tree): 67 | return "return\n" 68 | 69 | 70 | def process_getattr(tree: Tree): 71 | return join_children(tree, "") 72 | 73 | 74 | def process_name(tree: Tree): 75 | return tree.value 76 | 77 | 78 | def process_getattr_call(tree: Tree): 79 | return construct(tree) 80 | 81 | 82 | def process_expression(tree: Tree): 83 | return construct(tree) 84 | 85 | 86 | def process_assignment(tree: Tree): 87 | return construct(tree) 88 | 89 | 90 | def process_standalone_call(tree: Tree): 91 | return join_children(tree, "") + "\n" 92 | 93 | 94 | def process_func_var_stmt(tree: Tree): 95 | return construct(tree) 96 | 97 | 98 | def process_while_stmt(tree: Tree): 99 | return "while " + construct(tree, stop=1) + ":\n" + construct(tree, start=1) 100 | 101 | 102 | def process_continue(_tree: Tree): 103 | return "continue\n" 104 | 105 | 106 | def process_var_assigned(tree: Tree): 107 | return "var " + construct(tree, stop=1) + "=" + construct(tree, start=1) + "\n" 108 | 109 | 110 | def process_comparison(tree: Tree): 111 | return join_children(tree, "") 112 | 113 | 114 | def process_else_branch(tree: Tree): 115 | return "else:\n" + construct(tree) 116 | 117 | 118 | def process_string(tree: Tree): 119 | return construct(tree, start=1) 120 | 121 | 122 | def process_tool_stmt(tree: Tree): 123 | return "tool\n" 124 | 125 | 126 | def process_match_stmt(tree: Tree): 127 | return "match " + construct(tree, start=1) 128 | 129 | 130 | def process_match_branch(tree: Tree): 131 | return construct(tree, stop=1) + ":\n" + construct(tree, start=1) 132 | 133 | 134 | def process_pattern(tree: Tree): 135 | return construct(tree) 136 | 137 | 138 | def process_pattern_wildcard(tree: Tree): 139 | return construct(tree) 140 | 141 | 142 | def process_default(tree: Tree): 143 | raise ValueError("No type to handle this case: " + str(tree)) 144 | 145 | 146 | TREE_TYPES = { 147 | "assignment": process_assignment, 148 | "comparison": process_comparison, 149 | "continue": process_continue, 150 | "else_branch": process_else_branch, 151 | "expr": process_expr, 152 | "expression": process_expression, 153 | "extends": process_extends, 154 | "func_arg_typed": process_func_arg_typed, 155 | "func_args": process_func_args, 156 | "func_def": process_func_def, 157 | "func_header": process_func_header, 158 | "func_var_stmt": process_func_var_stmt, 159 | "getattr": process_getattr, 160 | "getattr_call": process_getattr_call, 161 | "if_branch": process_if_branch, 162 | "if_stmt": process_if_stmt, 163 | "match_branch": process_match_branch, 164 | "match_stmt": process_match_stmt, 165 | "name": process_name, 166 | "not_test": process_not_test, 167 | "pattern": process_pattern, 168 | "return_stmt": process_return_stmt, 169 | "standalone_call": process_standalone_call, 170 | "string": process_string, 171 | "tool_stmt": process_tool_stmt, 172 | "type_test": process_type_test, 173 | "var_assigned": process_var_assigned, 174 | "while_stmt": process_while_stmt, 175 | "wildcard_pattern": process_pattern_wildcard, 176 | } 177 | 178 | 179 | def construct(tree: Tree, **kwargs): 180 | to_return = "" 181 | 182 | start = kwargs.get("start", 0) 183 | stop = kwargs.get("stop", inf) 184 | stop = min(stop, len(tree.children)) 185 | 186 | for idx in range(start, stop): 187 | item = tree.children[idx] 188 | 189 | if isinstance(item, Tree): 190 | to_return += TREE_TYPES.get(item.data, process_default)(item) 191 | 192 | else: 193 | to_return += item.value 194 | 195 | return to_return 196 | 197 | 198 | def cleanup(original: str): 199 | """ 200 | Handles the replacement of common GDScript patterns 201 | Removing newlines and compressing the script in general 202 | """ 203 | # Remove comments 204 | original = re.sub(r"\t+#.*\n", "", original) 205 | 206 | # Remove comment headers 207 | original = re.sub(r'([\'"])\1\1(.*?)\1{3}', "", original, flags=re.DOTALL) 208 | 209 | # Remove multiple newlines 210 | original = re.sub(r"^\t?\n", "", original, flags=re.MULTILINE) 211 | 212 | # Always put return on a newline 213 | # original = re.sub(r"((\t)+.*:\s?return)", ":") 214 | 215 | return original 216 | 217 | 218 | def reconstruct(original: str, tree: Tree, **kwargs): 219 | to_return = [] 220 | 221 | constructed = construct(tree) 222 | split_original = cleanup(original).split("\n") 223 | split_construct = constructed.split("\n") 224 | 225 | for idx in range(len(split_construct)): 226 | tabs = TAB_MATCHER.search(split_original[idx]) 227 | if not tabs: 228 | to_return.append(split_construct[idx]) 229 | continue 230 | 231 | line = "\t" * (tabs.end() - tabs.start()) 232 | line += split_construct[idx] 233 | 234 | to_return.append(line) 235 | 236 | return "\n".join(to_return) 237 | --------------------------------------------------------------------------------