1
2
3
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
