150 lines
3.7 KiB
C
150 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* NOTE: we really do want to use the kernel headers here */
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#define __EXPORTED_HEADERS__
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <ctype.h>
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#include <sys/socket.h>
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struct security_class_mapping {
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const char *name;
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const char *perms[sizeof(unsigned) * 8 + 1];
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};
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#include "classmap.h"
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#include "initial_sid_to_string.h"
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#define max(x, y) (((int)(x) > (int)(y)) ? x : y)
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const char *progname;
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static void usage(void)
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{
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printf("usage: %s flask.h av_permissions.h\n", progname);
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exit(1);
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}
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static char *stoupperx(const char *s)
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{
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char *s2 = strdup(s);
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char *p;
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if (!s2) {
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fprintf(stderr, "%s: out of memory\n", progname);
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exit(3);
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}
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for (p = s2; *p; p++)
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*p = toupper(*p);
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return s2;
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}
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int main(int argc, char *argv[])
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{
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int i, j, k;
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int isids_len;
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FILE *fout;
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const char *needle = "SOCKET";
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char *substr;
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progname = argv[0];
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if (argc < 3)
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usage();
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fout = fopen(argv[1], "w");
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if (!fout) {
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fprintf(stderr, "Could not open %s for writing: %s\n",
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argv[1], strerror(errno));
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exit(2);
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}
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for (i = 0; secclass_map[i].name; i++) {
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struct security_class_mapping *map = &secclass_map[i];
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map->name = stoupperx(map->name);
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for (j = 0; map->perms[j]; j++)
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map->perms[j] = stoupperx(map->perms[j]);
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}
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isids_len = sizeof(initial_sid_to_string) / sizeof (char *);
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for (i = 1; i < isids_len; i++)
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initial_sid_to_string[i] = stoupperx(initial_sid_to_string[i]);
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fprintf(fout, "/* This file is automatically generated. Do not edit. */\n");
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fprintf(fout, "#ifndef _SELINUX_FLASK_H_\n#define _SELINUX_FLASK_H_\n\n");
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for (i = 0; secclass_map[i].name; i++) {
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struct security_class_mapping *map = &secclass_map[i];
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fprintf(fout, "#define SECCLASS_%s", map->name);
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for (j = 0; j < max(1, 40 - strlen(map->name)); j++)
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fprintf(fout, " ");
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fprintf(fout, "%2d\n", i+1);
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}
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fprintf(fout, "\n");
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for (i = 1; i < isids_len; i++) {
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const char *s = initial_sid_to_string[i];
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fprintf(fout, "#define SECINITSID_%s", s);
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for (j = 0; j < max(1, 40 - strlen(s)); j++)
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fprintf(fout, " ");
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fprintf(fout, "%2d\n", i);
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}
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fprintf(fout, "\n#define SECINITSID_NUM %d\n", i-1);
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fprintf(fout, "\nstatic inline bool security_is_socket_class(u16 kern_tclass)\n");
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fprintf(fout, "{\n");
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fprintf(fout, "\tbool sock = false;\n\n");
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fprintf(fout, "\tswitch (kern_tclass) {\n");
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for (i = 0; secclass_map[i].name; i++) {
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struct security_class_mapping *map = &secclass_map[i];
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substr = strstr(map->name, needle);
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if (substr && strcmp(substr, needle) == 0)
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fprintf(fout, "\tcase SECCLASS_%s:\n", map->name);
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}
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fprintf(fout, "\t\tsock = true;\n");
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fprintf(fout, "\t\tbreak;\n");
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fprintf(fout, "\tdefault:\n");
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fprintf(fout, "\t\tbreak;\n");
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fprintf(fout, "\t}\n\n");
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fprintf(fout, "\treturn sock;\n");
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fprintf(fout, "}\n");
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fprintf(fout, "\n#endif\n");
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fclose(fout);
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fout = fopen(argv[2], "w");
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if (!fout) {
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fprintf(stderr, "Could not open %s for writing: %s\n",
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argv[2], strerror(errno));
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exit(4);
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}
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fprintf(fout, "/* This file is automatically generated. Do not edit. */\n");
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fprintf(fout, "#ifndef _SELINUX_AV_PERMISSIONS_H_\n#define _SELINUX_AV_PERMISSIONS_H_\n\n");
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for (i = 0; secclass_map[i].name; i++) {
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struct security_class_mapping *map = &secclass_map[i];
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for (j = 0; map->perms[j]; j++) {
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if (j >= 32) {
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fprintf(stderr, "Too many permissions to fit into an access vector at (%s, %s).\n",
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map->name, map->perms[j]);
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exit(5);
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}
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fprintf(fout, "#define %s__%s", map->name,
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map->perms[j]);
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for (k = 0; k < max(1, 40 - strlen(map->name) - strlen(map->perms[j])); k++)
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fprintf(fout, " ");
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fprintf(fout, "0x%08xU\n", (1<<j));
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}
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}
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fprintf(fout, "\n#endif\n");
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fclose(fout);
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exit(0);
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}
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