1// SPDX-License-Identifier: GPL-2.0
  2
  3#include <stdio.h>
  4#include <stdlib.h>
  5#include <unistd.h>
  6#include <string.h>
  7#include <errno.h>
  8#include <ctype.h>
  9
 10struct security_class_mapping {
 11	const char *name;
 12	const char *perms[sizeof(unsigned) * 8 + 1];
 13};
 14
 15#include "classmap.h"
 16#include "initial_sid_to_string.h"
 17
 18const char *progname;
 19
 20static void usage(void)
 21{
 22	printf("usage: %s flask.h av_permissions.h\n", progname);
 23	exit(1);
 24}
 25
 26static char *stoupperx(const char *s)
 27{
 28	char *s2 = strdup(s);
 29	char *p;
 30
 31	if (!s2) {
 32		fprintf(stderr, "%s:  out of memory\n", progname);
 33		exit(3);
 34	}
 35
 36	for (p = s2; *p; p++)
 37		*p = toupper(*p);
 38	return s2;
 39}
 40
 41int main(int argc, char *argv[])
 42{
 43	int i, j;
 44	int isids_len;
 45	FILE *fout;
 46
 47	progname = argv[0];
 48
 49	if (argc < 3)
 50		usage();
 51
 52	fout = fopen(argv[1], "w");
 53	if (!fout) {
 54		fprintf(stderr, "Could not open %s for writing:  %s\n",
 55			argv[1], strerror(errno));
 56		exit(2);
 57	}
 58
 59	fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
 60	fprintf(fout, "#ifndef _SELINUX_FLASK_H_\n#define _SELINUX_FLASK_H_\n\n");
 61
 62	for (i = 0; secclass_map[i].name; i++) {
 63		char *name = stoupperx(secclass_map[i].name);
 64
 65		fprintf(fout, "#define SECCLASS_%-39s %2d\n", name, i+1);
 66		free(name);
 67	}
 68
 69	fprintf(fout, "\n");
 70
 71	isids_len = sizeof(initial_sid_to_string) / sizeof(char *);
 72	for (i = 1; i < isids_len; i++) {
 73		const char *s = initial_sid_to_string[i];
 74		if (s) {
 75			char *sidname = stoupperx(s);
 76
 77			fprintf(fout, "#define SECINITSID_%-39s %2d\n", sidname, i);
 78			free(sidname);
 79		}
 80	}
 81	fprintf(fout, "\n#define SECINITSID_NUM %d\n", i-1);
 82	fprintf(fout, "\nstatic inline bool security_is_socket_class(u16 kern_tclass)\n");
 83	fprintf(fout, "{\n");
 84	fprintf(fout, "\tbool sock = false;\n\n");
 85	fprintf(fout, "\tswitch (kern_tclass) {\n");
 86	for (i = 0; secclass_map[i].name; i++) {
 87		static char s[] = "SOCKET";
 88		int len, l;
 89		char *name = stoupperx(secclass_map[i].name);
 90
 91		len = strlen(name);
 92		l = sizeof(s) - 1;
 93		if (len >= l && memcmp(name + len - l, s, l) == 0)
 94			fprintf(fout, "\tcase SECCLASS_%s:\n", name);
 95		free(name);
 96	}
 97	fprintf(fout, "\t\tsock = true;\n");
 98	fprintf(fout, "\t\tbreak;\n");
 99	fprintf(fout, "\tdefault:\n");
100	fprintf(fout, "\t\tbreak;\n");
101	fprintf(fout, "\t}\n\n");
102	fprintf(fout, "\treturn sock;\n");
103	fprintf(fout, "}\n");
104
105	fprintf(fout, "\n#endif\n");
106
107	if (fclose(fout) != 0) {
108		fprintf(stderr, "Could not successfully close %s:  %s\n",
109			argv[1], strerror(errno));
110		exit(4);
111	}
112
113	fout = fopen(argv[2], "w");
114	if (!fout) {
115		fprintf(stderr, "Could not open %s for writing:  %s\n",
116			argv[2], strerror(errno));
117		exit(5);
118	}
119
120	fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
121	fprintf(fout, "#ifndef _SELINUX_AV_PERMISSIONS_H_\n#define _SELINUX_AV_PERMISSIONS_H_\n\n");
122
123	for (i = 0; secclass_map[i].name; i++) {
124		const struct security_class_mapping *map = &secclass_map[i];
125		int len;
126		char *name = stoupperx(map->name);
127
128		len = strlen(name);
129		for (j = 0; map->perms[j]; j++) {
130			char *permname;
131
132			if (j >= 32) {
133				fprintf(stderr, "Too many permissions to fit into an access vector at (%s, %s).\n",
134					map->name, map->perms[j]);
135				exit(5);
136			}
137			permname = stoupperx(map->perms[j]);
138			fprintf(fout, "#define %s__%-*s 0x%08xU\n", name,
139				39-len, permname, 1U<<j);
140			free(permname);
141		}
142		free(name);
143	}
144
145	fprintf(fout, "\n#endif\n");
146
147	if (fclose(fout) != 0) {
148		fprintf(stderr, "Could not successfully close %s:  %s\n",
149			argv[2], strerror(errno));
150		exit(6);
151	}
152
153	exit(0);
154}