1 /*
2  * Copyright (C) 2018 The Android Open Source Project
3  *
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  */
16 
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <fstream>
20 
21 #include "ufdt_test_overlay.h"
22 
23 extern "C" {
24 
25 #include "ufdt_overlay.h"
26 #include "libufdt_sysdeps.h"
27 
28 }
29 
30 size_t read_file_to_buf(const char *filename, char** buf) {
31     size_t size = 0;
32     std::ifstream file(filename, std::ios::binary | std::ios::in);
33 
34     if (!file) {
35         return size;
36     }
37 
38     file.seekg(0, file.end);
39     size = file.tellg();
40     file.seekg(0, std::ios::beg);
41 
42     *buf = new char[size];
43     file.read(*buf, size);
44     return size;
45 }
46 
47 int verify_overlay_files(const char *final_filename,
48                          char** overlay_filenames, size_t overlay_count) {
49     char* final_buf = nullptr;
50     void** overlay_buf_array = new void*[overlay_count];
51     struct fdt_header *blob = nullptr;
52     int result = 1;
53     size_t final_size = 0, overlay_size = 0;
54 
55     final_size = read_file_to_buf(final_filename, &final_buf);
56     if (final_size == 0) {
57         fprintf(stderr, "Cannot load final DTB: %s \n", final_filename);
58         goto end;
59     }
60 
61     for (size_t i = 0; i < overlay_count; i++) {
62         overlay_size = read_file_to_buf(overlay_filenames[i],
63                                         reinterpret_cast<char**>(&overlay_buf_array[i]));
64         if (overlay_size == 0) {
65             fprintf(stderr, "Cannot load DTB Overlay: %s\n", overlay_filenames[i]);
66             goto end;
67         }
68     }
69 
70     blob = ufdt_install_blob(final_buf, final_size);
71     if (!blob) {
72         fprintf(stderr, "ufdt_install_blob() returns null\n");
73         goto end;
74     }
75 
76     result = ufdt_verify_dtbo(blob, final_size, overlay_buf_array, overlay_count);
77 
78     if (result != 0) {
79         fprintf(stderr, "bad overlay error");
80     }
81 
82 end:
83     // Do not dto_free(blob) - it's the same as final_buf.
84     for (size_t i = 0; i < overlay_count; i++) {
85         if (overlay_buf_array[i]) dto_free(overlay_buf_array[i]);
86     }
87     delete[] overlay_buf_array;
88 
89     if (final_buf) dto_free(final_buf);
90 
91     return result;
92 }
93 
94 int main(int argc, char **argv) {
95     if (argc < 3) {
96         fprintf(stderr, "Usage: %s <final_file> <overlay_file1> <overlay_file2> ..\n", argv[0]);
97         return 1;
98     }
99 
100     const char *final_file = argv[1];
101     char** overlay_file_names = new char*[argc - 2];
102 
103     for(int argv_idx = 2; argv_idx < argc; argv_idx++) {
104         overlay_file_names[argv_idx - 2] = argv[argv_idx];
105     }
106     int ret = verify_overlay_files(final_file, overlay_file_names, argc - 2);
107 
108     return ret == 0 ? ret : 1;
109 }
110