| 23 | |
| 24 | |
| 25 | class StringDecoder: |
| 26 | |
| 27 | MAX_PASSES = 10 |
| 28 | |
| 29 | def decode_all(self, source: str) -> str: |
| 30 | try: |
| 31 | for _ in range(self.MAX_PASSES): |
| 32 | decoded = self._single_pass(source) |
| 33 | if decoded == source: |
| 34 | break |
| 35 | source = decoded |
| 36 | except RecursionError: |
| 37 | pass # return whatever we have so far |
| 38 | except Exception: |
| 39 | pass # return whatever we have so far |
| 40 | return source |
| 41 | |
| 42 | def _single_pass(self, source: str) -> str: |
| 43 | # 0a. AST constant folding: handles b64/b85 chains, chr(ord(i)-N), |
| 44 | # int.__xor__ XOR decode, globals()["__builtins__"], builtins-dict subscripts. |
| 45 | source = fold_constants(source) |
| 46 | |
| 47 | # 0b. Resolve import aliases (must be first for regex compatibility) |
| 48 | source = self._resolve_import_aliases_for_decoding(source) |
| 49 | |
| 50 | # 1. Regex-based transformations |
| 51 | source = self._unwrap_eval_exec(source) |
| 52 | source = self._decode_base64_calls(source) |
| 53 | source = self._decode_base64_dynamic_import(source) |
| 54 | source = self._decode_base32_calls(source) |
| 55 | source = self._decode_base85_calls(source) |
| 56 | source = self._decode_base16_calls(source) |
| 57 | source = self._decode_hex_escape_strings(source) |
| 58 | source = self._decode_bytes_fromhex(source) |
| 59 | source = self._decode_bytearray_literals(source) |
| 60 | source = self._decode_chr_chains(source) |
| 61 | source = self._decode_join_chr_list(source) |
| 62 | source = self._decode_join_chr_map(source) |
| 63 | source = self._decode_xor_zip(source) |
| 64 | source = self._decode_xor_chr_list(source) |
| 65 | source = self._decode_map_lambda_offset_chr(source) |
| 66 | source = self._decode_xor_byte_arrays(source) |
| 67 | source = self._decode_xor_comprehension(source) |
| 68 | source = self._decode_zlib(source) |
| 69 | source = self._decode_lzma(source) |
| 70 | source = self._decode_bz2(source) |
| 71 | source = self._decode_rot13(source) |
| 72 | source = self._decode_unicode_escapes(source) |
| 73 | source = self._decode_codecs_hex(source) |
| 74 | source = self._decode_reversed_string(source) |
| 75 | source = self._decode_int_hex_literal(source) |
| 76 | source = self._decode_encode_decode_roundtrip(source) |
| 77 | |
| 78 | # 2. Consolidated AST-based transformations |
| 79 | source = self._run_ast_transformations(source) |
| 80 | |
| 81 | return source |
| 82 | |