genheaders.c
3.45 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
// SPDX-License-Identifier: GPL-2.0
/* NOTE: we really do want to use the kernel headers here */
#define __EXPORTED_HEADERS__
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
struct security_class_mapping {
const char *name;
const char *perms[sizeof(unsigned) * 8 + 1];
};
#include "classmap.h"
#include "initial_sid_to_string.h"
const char *progname;
static void usage(void)
{
printf("usage: %s flask.h av_permissions.h\n", progname);
exit(1);
}
static char *stoupperx(const char *s)
{
char *s2 = strdup(s);
char *p;
if (!s2) {
fprintf(stderr, "%s: out of memory\n", progname);
exit(3);
}
for (p = s2; *p; p++)
*p = toupper(*p);
return s2;
}
int main(int argc, char *argv[])
{
int i, j;
int isids_len;
FILE *fout;
progname = argv[0];
if (argc < 3)
usage();
fout = fopen(argv[1], "w");
if (!fout) {
fprintf(stderr, "Could not open %s for writing: %s\n",
argv[1], strerror(errno));
exit(2);
}
for (i = 0; secclass_map[i].name; i++) {
struct security_class_mapping *map = &secclass_map[i];
map->name = stoupperx(map->name);
for (j = 0; map->perms[j]; j++)
map->perms[j] = stoupperx(map->perms[j]);
}
isids_len = sizeof(initial_sid_to_string) / sizeof (char *);
for (i = 1; i < isids_len; i++) {
const char *s = initial_sid_to_string[i];
if (s)
initial_sid_to_string[i] = stoupperx(s);
}
fprintf(fout, "/* This file is automatically generated. Do not edit. */\n");
fprintf(fout, "#ifndef _SELINUX_FLASK_H_\n#define _SELINUX_FLASK_H_\n\n");
for (i = 0; secclass_map[i].name; i++) {
struct security_class_mapping *map = &secclass_map[i];
fprintf(fout, "#define SECCLASS_%-39s %2d\n", map->name, i+1);
}
fprintf(fout, "\n");
for (i = 1; i < isids_len; i++) {
const char *s = initial_sid_to_string[i];
if (s)
fprintf(fout, "#define SECINITSID_%-39s %2d\n", s, i);
}
fprintf(fout, "\n#define SECINITSID_NUM %d\n", i-1);
fprintf(fout, "\nstatic inline bool security_is_socket_class(u16 kern_tclass)\n");
fprintf(fout, "{\n");
fprintf(fout, "\tbool sock = false;\n\n");
fprintf(fout, "\tswitch (kern_tclass) {\n");
for (i = 0; secclass_map[i].name; i++) {
static char s[] = "SOCKET";
struct security_class_mapping *map = &secclass_map[i];
int len = strlen(map->name), l = sizeof(s) - 1;
if (len >= l && memcmp(map->name + len - l, s, l) == 0)
fprintf(fout, "\tcase SECCLASS_%s:\n", map->name);
}
fprintf(fout, "\t\tsock = true;\n");
fprintf(fout, "\t\tbreak;\n");
fprintf(fout, "\tdefault:\n");
fprintf(fout, "\t\tbreak;\n");
fprintf(fout, "\t}\n\n");
fprintf(fout, "\treturn sock;\n");
fprintf(fout, "}\n");
fprintf(fout, "\n#endif\n");
fclose(fout);
fout = fopen(argv[2], "w");
if (!fout) {
fprintf(stderr, "Could not open %s for writing: %s\n",
argv[2], strerror(errno));
exit(4);
}
fprintf(fout, "/* This file is automatically generated. Do not edit. */\n");
fprintf(fout, "#ifndef _SELINUX_AV_PERMISSIONS_H_\n#define _SELINUX_AV_PERMISSIONS_H_\n\n");
for (i = 0; secclass_map[i].name; i++) {
struct security_class_mapping *map = &secclass_map[i];
int len = strlen(map->name);
for (j = 0; map->perms[j]; j++) {
if (j >= 32) {
fprintf(stderr, "Too many permissions to fit into an access vector at (%s, %s).\n",
map->name, map->perms[j]);
exit(5);
}
fprintf(fout, "#define %s__%-*s 0x%08xU\n", map->name,
39-len, map->perms[j], 1U<<j);
}
}
fprintf(fout, "\n#endif\n");
fclose(fout);
exit(0);
}