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 
8 struct 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) (((int)(x) > (int)(y)) ? x : y)
17 
18 const char *progname;
19 
20 static void usage(void)
21 {
22 	printf("usage: %s flask.h av_permissions.h\n", progname);
23 	exit(1);
24 }
25 
26 static 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 
41 int main(int argc, char *argv[])
42 {
43 	int i, j, k;
44 	int isids_len;
45 	FILE *fout;
46 	const char *needle = "SOCKET";
47 	char *substr;
48 
49 	progname = argv[0];
50 
51 	if (argc < 3)
52 		usage();
53 
54 	fout = fopen(argv[1], "w");
55 	if (!fout) {
56 		fprintf(stderr, "Could not open %s for writing:  %s\n",
57 			argv[1], strerror(errno));
58 		exit(2);
59 	}
60 
61 	for (i = 0; secclass_map[i].name; i++) {
62 		struct security_class_mapping *map = &secclass_map[i];
63 		map->name = stoupperx(map->name);
64 		for (j = 0; map->perms[j]; j++)
65 			map->perms[j] = stoupperx(map->perms[j]);
66 	}
67 
68 	isids_len = sizeof(initial_sid_to_string) / sizeof (char *);
69 	for (i = 1; i < isids_len; i++)
70 		initial_sid_to_string[i] = stoupperx(initial_sid_to_string[i]);
71 
72 	fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
73 	fprintf(fout, "#ifndef _SELINUX_FLASK_H_\n#define _SELINUX_FLASK_H_\n\n");
74 
75 	for (i = 0; secclass_map[i].name; i++) {
76 		struct security_class_mapping *map = &secclass_map[i];
77 		fprintf(fout, "#define SECCLASS_%s", map->name);
78 		for (j = 0; j < max(1, 40 - strlen(map->name)); j++)
79 			fprintf(fout, " ");
80 		fprintf(fout, "%2d\n", i+1);
81 	}
82 
83 	fprintf(fout, "\n");
84 
85 	for (i = 1; i < isids_len; i++) {
86 		const char *s = initial_sid_to_string[i];
87 		fprintf(fout, "#define SECINITSID_%s", s);
88 		for (j = 0; j < max(1, 40 - strlen(s)); j++)
89 			fprintf(fout, " ");
90 		fprintf(fout, "%2d\n", 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 		struct security_class_mapping *map = &secclass_map[i];
99 		substr = strstr(map->name, needle);
100 		if (substr && strcmp(substr, needle) == 0)
101 			fprintf(fout, "\tcase SECCLASS_%s:\n", map->name);
102 	}
103 	fprintf(fout, "\t\tsock = true;\n");
104 	fprintf(fout, "\t\tbreak;\n");
105 	fprintf(fout, "\tdefault:\n");
106 	fprintf(fout, "\t\tbreak;\n");
107 	fprintf(fout, "\t}\n\n");
108 	fprintf(fout, "\treturn sock;\n");
109 	fprintf(fout, "}\n");
110 
111 	fprintf(fout, "\n#endif\n");
112 	fclose(fout);
113 
114 	fout = fopen(argv[2], "w");
115 	if (!fout) {
116 		fprintf(stderr, "Could not open %s for writing:  %s\n",
117 			argv[2], strerror(errno));
118 		exit(4);
119 	}
120 
121 	fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
122 	fprintf(fout, "#ifndef _SELINUX_AV_PERMISSIONS_H_\n#define _SELINUX_AV_PERMISSIONS_H_\n\n");
123 
124 	for (i = 0; secclass_map[i].name; i++) {
125 		struct security_class_mapping *map = &secclass_map[i];
126 		for (j = 0; map->perms[j]; j++) {
127 			fprintf(fout, "#define %s__%s", map->name,
128 				map->perms[j]);
129 			for (k = 0; k < max(1, 40 - strlen(map->name) - strlen(map->perms[j])); k++)
130 				fprintf(fout, " ");
131 			fprintf(fout, "0x%08xUL\n", (1<<j));
132 		}
133 	}
134 
135 	fprintf(fout, "\n#endif\n");
136 	fclose(fout);
137 	exit(0);
138 }
139