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1#!/usr/bin/env python
2# -*- coding: utf-8 -*-
3# Copyright (c) 2023 Huawei Device Co., Ltd.
4# Licensed under the Apache License, Version 2.0 (the "License");
5# you may not use this file except in compliance with the License.
6# You may obtain a copy of the License at
7#
8#     http://www.apache.org/licenses/LICENSE-2.0
9#
10# Unless required by applicable law or agreed to in writing, software
11# distributed under the License is distributed on an "AS IS" BASIS,
12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13# See the License for the specific language governing permissions and
14# limitations under the License.
15
16import tarfile
17import argparse
18import os
19import subprocess
20import sys
21import shutil
22
23
24def untar_file(tar_file_path, extract_path):
25    try:
26        tar_cmd = ['tar', '-zxf', tar_file_path, '-C', extract_path]
27        subprocess.run(tar_cmd, check=True)
28    except Exception as e:
29        print("tar error!")
30        return
31
32
33def move_file(src_path, dst_path):
34    files = [
35        "CVE-2019-6129.patch",
36        "huawei_libpng_CMakeList.patch",
37        "libpng-fix-arm-neon.patch",
38        "libpng-multilib.patch",
39        "backport-libpng-1.6.37-enable-valid.patch",
40        "pnglibconf.h",
41        "CVE-2018-14048.patch",
42        "libpng_optimize.patch"
43    ]
44    for file in files:
45        src_file = os.path.join(src_path, file)
46        dst_file = os.path.join(dst_path, file)
47        shutil.copy(src_file, dst_file)
48
49
50def apply_patch(patch_file, target_dir):
51    try:
52        if not os.path.exists(target_dir):
53            return
54        patch_cmd = ['patch', '-p1', "--fuzz=0", "--no-backup-if-mismatch", '-i', patch_file, '-d', target_dir]
55        subprocess.run(patch_cmd, check=True)
56    except Exception as e:
57        print("apply_patch error!")
58        return
59
60
61def do_patch(target_dir):
62    patch_file = [
63        "CVE-2019-6129.patch",
64        "huawei_libpng_CMakeList.patch",
65        "libpng-fix-arm-neon.patch",
66        "libpng-multilib.patch",
67        "backport-libpng-1.6.37-enable-valid.patch",
68        "CVE-2018-14048.patch",
69        "libpng_optimize.patch"
70    ]
71
72    for patch in patch_file:
73        apply_patch(patch, target_dir)
74
75
76def main():
77    libpng_path = argparse.ArgumentParser()
78    libpng_path.add_argument('--gen-dir', help='generate path of log', required=True)
79    libpng_path.add_argument('--source-dir', help='generate path of log', required=True)
80    args = libpng_path.parse_args()
81    tar_file_path = os.path.join(args.source_dir, "libpng-1.6.38.tar.gz")
82    target_dir = os.path.join(args.gen_dir, "libpng-1.6.38")
83
84    untar_file(tar_file_path, args.gen_dir)
85    move_file(args.source_dir, target_dir)
86    do_patch(target_dir)
87    return 0
88
89if __name__ == '__main__':
90    sys.exit(main())
91