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	fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
 63	fprintf(fout, "#ifndef _SELINUX_FLASK_H_\n#define _SELINUX_FLASK_H_\n\n");
 64
 65	for (i = 0; secclass_map[i].name; i++) {
 66		char *name = stoupperx(secclass_map[i].name);
 67
 68		fprintf(fout, "#define SECCLASS_%-39s %2d\n", name, i+1);
 69		free(name);
 70	}
 71
 72	fprintf(fout, "\n");
 73
 74	isids_len = sizeof(initial_sid_to_string) / sizeof(char *);
 75	for (i = 1; i < isids_len; i++) {
 76		const char *s = initial_sid_to_string[i];
 77		if (s) {
 78			char *sidname = stoupperx(s);
 79
 80			fprintf(fout, "#define SECINITSID_%-39s %2d\n", sidname, i);
 81			free(sidname);
 82		}
 83	}
 84	fprintf(fout, "\n#define SECINITSID_NUM %d\n", i-1);
 85	fprintf(fout, "\nstatic inline bool security_is_socket_class(u16 kern_tclass)\n");
 86	fprintf(fout, "{\n");
 87	fprintf(fout, "\tbool sock = false;\n\n");
 88	fprintf(fout, "\tswitch (kern_tclass) {\n");
 89	for (i = 0; secclass_map[i].name; i++) {
 90		static char s[] = "SOCKET";
 91		int len, l;
 92		char *name = stoupperx(secclass_map[i].name);
 93
 94		len = strlen(name);
 95		l = sizeof(s) - 1;
 96		if (len >= l && memcmp(name + len - l, s, l) == 0)
 97			fprintf(fout, "\tcase SECCLASS_%s:\n", name);
 98		free(name);
 99	}
100	fprintf(fout, "\t\tsock = true;\n");
101	fprintf(fout, "\t\tbreak;\n");
102	fprintf(fout, "\tdefault:\n");
103	fprintf(fout, "\t\tbreak;\n");
104	fprintf(fout, "\t}\n\n");
105	fprintf(fout, "\treturn sock;\n");
106	fprintf(fout, "}\n");
107
108	fprintf(fout, "\n#endif\n");
109
110	if (fclose(fout) != 0) {
111		fprintf(stderr, "Could not successfully close %s:  %s\n",
112			argv[1], strerror(errno));
113		exit(4);
114	}
115
116	fout = fopen(argv[2], "w");
117	if (!fout) {
118		fprintf(stderr, "Could not open %s for writing:  %s\n",
119			argv[2], strerror(errno));
120		exit(5);
121	}
122
123	fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
124	fprintf(fout, "#ifndef _SELINUX_AV_PERMISSIONS_H_\n#define _SELINUX_AV_PERMISSIONS_H_\n\n");
125
126	for (i = 0; secclass_map[i].name; i++) {
127		const struct security_class_mapping *map = &secclass_map[i];
128		int len;
129		char *name = stoupperx(map->name);
130
131		len = strlen(name);
132		for (j = 0; map->perms[j]; j++) {
133			char *permname;
134
135			if (j >= 32) {
136				fprintf(stderr, "Too many permissions to fit into an access vector at (%s, %s).\n",
137					map->name, map->perms[j]);
138				exit(5);
139			}
140			permname = stoupperx(map->perms[j]);
141			fprintf(fout, "#define %s__%-*s 0x%08xU\n", name,
142				39-len, permname, 1U<<j);
143			free(permname);
144		}
145		free(name);
146	}
147
148	fprintf(fout, "\n#endif\n");
149
150	if (fclose(fout) != 0) {
151		fprintf(stderr, "Could not successfully close %s:  %s\n",
152			argv[2], strerror(errno));
153		exit(6);
154	}
155
156	exit(0);
157}