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authorStephen Smalley <sds@tycho.nsa.gov>2009-09-30 13:41:02 -0400
committerJames Morris <jmorris@namei.org>2009-10-07 06:56:44 -0400
commit8753f6bec352392b52ed9b5e290afb34379f4612 (patch)
treeb5f381be9f56125309bfbfcaa73d68e08c309747 /scripts/selinux
parentc6d3aaa4e35c71a32a86ececacd4eea7ecfc316c (diff)
selinux: generate flask headers during kernel build
Add a simple utility (scripts/selinux/genheaders) and invoke it to generate the kernel-private class and permission indices in flask.h and av_permissions.h automatically during the kernel build from the security class mapping definitions in classmap.h. Adding new kernel classes and permissions can then be done just by adding them to classmap.h. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'scripts/selinux')
-rw-r--r--scripts/selinux/Makefile4
-rw-r--r--scripts/selinux/genheaders/Makefile5
-rw-r--r--scripts/selinux/genheaders/genheaders.c118
3 files changed, 125 insertions, 2 deletions
diff --git a/scripts/selinux/Makefile b/scripts/selinux/Makefile
index ca4b1ec01822..e8049da1831f 100644
--- a/scripts/selinux/Makefile
+++ b/scripts/selinux/Makefile
@@ -1,2 +1,2 @@
1subdir-y := mdp 1subdir-y := mdp genheaders
2subdir- += mdp 2subdir- += mdp genheaders
diff --git a/scripts/selinux/genheaders/Makefile b/scripts/selinux/genheaders/Makefile
new file mode 100644
index 000000000000..417b165008ee
--- /dev/null
+++ b/scripts/selinux/genheaders/Makefile
@@ -0,0 +1,5 @@
1hostprogs-y := genheaders
2HOST_EXTRACFLAGS += -Isecurity/selinux/include
3
4always := $(hostprogs-y)
5clean-files := $(hostprogs-y)
diff --git a/scripts/selinux/genheaders/genheaders.c b/scripts/selinux/genheaders/genheaders.c
new file mode 100644
index 000000000000..3b16145dabe3
--- /dev/null
+++ b/scripts/selinux/genheaders/genheaders.c
@@ -0,0 +1,118 @@
1#include <stdio.h>
2#include <stdlib.h>
3#include <unistd.h>
4#include <string.h>
5#include <errno.h>
6#include <ctype.h>
7
8struct security_class_mapping {
9 const char *name;
10 const char *perms[sizeof(unsigned) * 8 + 1];
11};
12
13#include "classmap.h"
14#include "initial_sid_to_string.h"
15
16#define max(x, y) ((x > y) ? x : y)
17
18const char *progname;
19
20void usage(void)
21{
22 printf("usage: %s flask.h av_permissions.h\n", progname);
23 exit(1);
24}
25
26char *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, k;
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 for (i = 0; secclass_map[i].name; i++) {
60 struct security_class_mapping *map = &secclass_map[i];
61 map->name = stoupperx(map->name);
62 for (j = 0; map->perms[j]; j++)
63 map->perms[j] = stoupperx(map->perms[j]);
64 }
65
66 isids_len = sizeof(initial_sid_to_string) / sizeof (char *);
67 for (i = 1; i < isids_len; i++)
68 initial_sid_to_string[i] = stoupperx(initial_sid_to_string[i]);
69
70 fprintf(fout, "/* This file is automatically generated. Do not edit. */\n");
71 fprintf(fout, "#ifndef _SELINUX_FLASK_H_\n#define _SELINUX_FLASK_H_\n\n");
72
73 for (i = 0; secclass_map[i].name; i++) {
74 struct security_class_mapping *map = &secclass_map[i];
75 fprintf(fout, "#define SECCLASS_%s", map->name);
76 for (j = 0; j < max(1, 40 - strlen(map->name)); j++)
77 fprintf(fout, " ");
78 fprintf(fout, "%2d\n", i+1);
79 }
80
81 fprintf(fout, "\n");
82
83 for (i = 1; i < isids_len; i++) {
84 char *s = initial_sid_to_string[i];
85 fprintf(fout, "#define SECINITSID_%s", s);
86 for (j = 0; j < max(1, 40 - strlen(s)); j++)
87 fprintf(fout, " ");
88 fprintf(fout, "%2d\n", i);
89 }
90 fprintf(fout, "\n#define SECINITSID_NUM %d\n", i-1);
91 fprintf(fout, "\n#endif\n");
92 fclose(fout);
93
94 fout = fopen(argv[2], "w");
95 if (!fout) {
96 fprintf(stderr, "Could not open %s for writing: %s\n",
97 argv[2], strerror(errno));
98 exit(4);
99 }
100
101 fprintf(fout, "/* This file is automatically generated. Do not edit. */\n");
102 fprintf(fout, "#ifndef _SELINUX_AV_PERMISSIONS_H_\n#define _SELINUX_AV_PERMISSIONS_H_\n\n");
103
104 for (i = 0; secclass_map[i].name; i++) {
105 struct security_class_mapping *map = &secclass_map[i];
106 for (j = 0; map->perms[j]; j++) {
107 fprintf(fout, "#define %s__%s", map->name,
108 map->perms[j]);
109 for (k = 0; k < max(1, 40 - strlen(map->name) - strlen(map->perms[j])); k++)
110 fprintf(fout, " ");
111 fprintf(fout, "0x%08xUL\n", (1<<j));
112 }
113 }
114
115 fprintf(fout, "\n#endif\n");
116 fclose(fout);
117 exit(0);
118}