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