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comparison bootutil/c139_main.c @ 12:fe5f7ba7f154

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c139-analyze-boot utility put together, compiles
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 10 Jun 2023 04:58:26 +0000
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11:2a62a7decd9f 12:fe5f7ba7f154
1 /*
2 * This C module is the main for c139-analyze-boot utility.
3 */
4
5 #include <sys/types.h>
6 #include <sys/file.h>
7 #include <sys/stat.h>
8 #include <stdio.h>
9 #include <stdlib.h>
10 #include <string.h>
11 #include <strings.h>
12 #include <unistd.h>
13 #include "../bootmatch/bootmatch.h"
14
15 extern struct bootmatch bootmatch_c11x_lockable[];
16 extern struct bootmatch bootmatch_c11x_nolock[];
17 extern struct bootmatch bootmatch_c139_lockable[];
18 extern struct bootmatch bootmatch_c139_nolock[];
19 extern struct bootmatch bootmatch_fc_patch[];
20
21 #define LENGTH_OF_INTEREST 0x2064
22
23 static u_char image[LENGTH_OF_INTEREST];
24
25 static void
26 read_bin_file(filename)
27 char *filename;
28 {
29 int fd;
30 struct stat st;
31
32 fd = open(filename, O_RDONLY);
33 if (fd < 0) {
34 perror(filename);
35 exit(1);
36 }
37 fstat(fd, &st);
38 if (!S_ISREG(st.st_mode)) {
39 fprintf(stderr, "error: %s is not a regular file\n", filename);
40 exit(1);
41 }
42 if (st.st_size < LENGTH_OF_INTEREST) {
43 fprintf(stderr, "error: %s is too short\n", filename);
44 exit(1);
45 }
46 read(fd, image, LENGTH_OF_INTEREST);
47 close(fd);
48 }
49
50 static int
51 check_810_signature()
52 {
53 if (image[0x810] != '1')
54 return(0);
55 if (image[0x811] != '0')
56 return(0);
57 if (image[0x812] != '0')
58 return(0);
59 if (image[0x813] == '3' || image[0x813] == '4')
60 return(1);
61 else
62 return(0);
63 }
64
65 static void
66 classify_by_lock_word()
67 {
68 unsigned lword;
69
70 lword = ((unsigned) image[0x2060]) |
71 ((unsigned) image[0x2061] << 8) |
72 ((unsigned) image[0x2062] << 16) |
73 ((unsigned) image[0x2063] << 24);
74 if (lword == 0xDDDDDDDD)
75 puts("unlocked");
76 else
77 puts("locked");
78 }
79
80 main(argc, argv)
81 char **argv;
82 {
83 if (argc != 2) {
84 fprintf(stderr, "usage: %s flashdump.bin\n", argv[0]);
85 exit(1);
86 }
87 read_bin_file(argv[1]);
88 if (check_for_match(image, bootmatch_fc_patch)) {
89 puts("fc");
90 exit(0);
91 }
92 if (check_for_match(image, bootmatch_c11x_nolock)) {
93 puts("unlocked");
94 exit(0);
95 }
96 if (check_for_match(image, bootmatch_c11x_lockable)) {
97 classify_by_lock_word();
98 exit(0);
99 }
100 if (check_for_match(image, bootmatch_c139_nolock)) {
101 if (!check_810_signature()) {
102 puts("unknown");
103 exit(0);
104 }
105 puts("unlocked");
106 exit(0);
107 }
108 if (check_for_match(image, bootmatch_c139_lockable)) {
109 if (!check_810_signature()) {
110 puts("unknown");
111 exit(0);
112 }
113 classify_by_lock_word();
114 exit(0);
115 }
116 puts("unknown");
117 exit(0);
118 }