1// SPDX-License-Identifier: GPL-2.0
2
3/* NOTE: we really do want to use the kernel headers here */
4#define __EXPORTED_HEADERS__
5
6#include <stdio.h>
7#include <stdlib.h>
8#include <unistd.h>
9#include <string.h>
10#include <errno.h>
11#include <ctype.h>
12
13struct security_class_mapping {
14	const char *name;
15	const char *perms[sizeof(unsigned) * 8 + 1];
16};
17
18#include "classmap.h"
19#include "initial_sid_to_string.h"
20
21const char *progname;
22
23static void usage(void)
24{
25	printf("usage: %s flask.h av_permissions.h\n", progname);
26	exit(1);
27}
28
29static char *stoupperx(const char *s)
30{
31	char *s2 = strdup(s);
32	char *p;
33
34	if (!s2) {
35		fprintf(stderr, "%s:  out of memory\n", progname);
36		exit(3);
37	}
38
39	for (p = s2; *p; p++)
40		*p = toupper(*p);
41	return s2;
42}
43
44int main(int argc, char *argv[])
45{
46	int i, j;
47	int isids_len;
48	FILE *fout;
49
50	progname = argv[0];
51
52	if (argc < 3)
53		usage();
54
55	fout = fopen(argv[1], "w");
56	if (!fout) {
57		fprintf(stderr, "Could not open %s for writing:  %s\n",
58			argv[1], strerror(errno));
59		exit(2);
60	}
61
62	for (i = 0; secclass_map[i].name; i++) {
63		struct security_class_mapping *map = &secclass_map[i];
64		map->name = stoupperx(map->name);
65		for (j = 0; map->perms[j]; j++)
66			map->perms[j] = stoupperx(map->perms[j]);
67	}
68
69	isids_len = sizeof(initial_sid_to_string) / sizeof (char *);
70	for (i = 1; i < isids_len; i++) {
71		const char *s = initial_sid_to_string[i];
72
73		if (s)
74			initial_sid_to_string[i] = stoupperx(s);
75	}
76
77	fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
78	fprintf(fout, "#ifndef _SELINUX_FLASK_H_\n#define _SELINUX_FLASK_H_\n\n");
79
80	for (i = 0; secclass_map[i].name; i++) {
81		struct security_class_mapping *map = &secclass_map[i];
82		fprintf(fout, "#define SECCLASS_%-39s %2d\n", map->name, i+1);
83	}
84
85	fprintf(fout, "\n");
86
87	for (i = 1; i < isids_len; i++) {
88		const char *s = initial_sid_to_string[i];
89		if (s)
90			fprintf(fout, "#define SECINITSID_%-39s %2d\n", s, i);
91	}
92	fprintf(fout, "\n#define SECINITSID_NUM %d\n", i-1);
93	fprintf(fout, "\nstatic inline bool security_is_socket_class(u16 kern_tclass)\n");
94	fprintf(fout, "{\n");
95	fprintf(fout, "\tbool sock = false;\n\n");
96	fprintf(fout, "\tswitch (kern_tclass) {\n");
97	for (i = 0; secclass_map[i].name; i++) {
98		static char s[] = "SOCKET";
99		struct security_class_mapping *map = &secclass_map[i];
100		int len = strlen(map->name), l = sizeof(s) - 1;
101		if (len >= l && memcmp(map->name + len - l, s, l) == 0)
102			fprintf(fout, "\tcase SECCLASS_%s:\n", map->name);
103	}
104	fprintf(fout, "\t\tsock = true;\n");
105	fprintf(fout, "\t\tbreak;\n");
106	fprintf(fout, "\tdefault:\n");
107	fprintf(fout, "\t\tbreak;\n");
108	fprintf(fout, "\t}\n\n");
109	fprintf(fout, "\treturn sock;\n");
110	fprintf(fout, "}\n");
111
112	fprintf(fout, "\n#endif\n");
113	fclose(fout);
114
115	fout = fopen(argv[2], "w");
116	if (!fout) {
117		fprintf(stderr, "Could not open %s for writing:  %s\n",
118			argv[2], strerror(errno));
119		exit(4);
120	}
121
122	fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
123	fprintf(fout, "#ifndef _SELINUX_AV_PERMISSIONS_H_\n#define _SELINUX_AV_PERMISSIONS_H_\n\n");
124
125	for (i = 0; secclass_map[i].name; i++) {
126		struct security_class_mapping *map = &secclass_map[i];
127		int len = strlen(map->name);
128		for (j = 0; map->perms[j]; j++) {
129			if (j >= 32) {
130				fprintf(stderr, "Too many permissions to fit into an access vector at (%s, %s).\n",
131					map->name, map->perms[j]);
132				exit(5);
133			}
134			fprintf(fout, "#define %s__%-*s 0x%08xU\n", map->name,
135				39-len, map->perms[j], 1U<<j);
136		}
137	}
138
139	fprintf(fout, "\n#endif\n");
140	fclose(fout);
141	exit(0);
142}
143