cregit-Linux how code gets into the kernel

Release 4.15 scripts/selinux/genheaders/genheaders.c

// SPDX-License-Identifier: GPL-2.0

/* NOTE: we really do want to use the kernel headers here */

#define __EXPORTED_HEADERS__

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <sys/socket.h>


struct security_class_mapping {
	
const char *name;
	
const char *perms[sizeof(unsigned) * 8 + 1];
};

#include "classmap.h"
#include "initial_sid_to_string.h"


#define max(x, y) (((int)(x) > (int)(y)) ? x : y)


const char *progname;


static void usage(void) { printf("usage: %s flask.h av_permissions.h\n", progname); exit(1); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen D. Smalley1995.00%150.00%
Alan Cox15.00%150.00%
Total20100.00%2100.00%


static char *stoupperx(const char *s) { char *s2 = strdup(s); char *p; if (!s2) { fprintf(stderr, "%s: out of memory\n", progname); exit(3); } for (p = s2; *p; p++) *p = toupper(*p); return s2; }

Contributors

PersonTokensPropCommitsCommitProp
Stephen D. Smalley6998.57%150.00%
Alan Cox11.43%150.00%
Total70100.00%2100.00%


int main(int argc, char *argv[]) { int i, j, k; int isids_len; FILE *fout; const char *needle = "SOCKET"; char *substr; progname = argv[0]; if (argc < 3) usage(); fout = fopen(argv[1], "w"); if (!fout) { fprintf(stderr, "Could not open %s for writing: %s\n", argv[1], strerror(errno)); exit(2); } for (i = 0; secclass_map[i].name; i++) { struct security_class_mapping *map = &secclass_map[i]; map->name = stoupperx(map->name); for (j = 0; map->perms[j]; j++) map->perms[j] = stoupperx(map->perms[j]); } isids_len = sizeof(initial_sid_to_string) / sizeof (char *); for (i = 1; i < isids_len; i++) initial_sid_to_string[i] = stoupperx(initial_sid_to_string[i]); fprintf(fout, "/* This file is automatically generated. Do not edit. */\n"); fprintf(fout, "#ifndef _SELINUX_FLASK_H_\n#define _SELINUX_FLASK_H_\n\n"); for (i = 0; secclass_map[i].name; i++) { struct security_class_mapping *map = &secclass_map[i]; fprintf(fout, "#define SECCLASS_%s", map->name); for (j = 0; j < max(1, 40 - strlen(map->name)); j++) fprintf(fout, " "); fprintf(fout, "%2d\n", i+1); } fprintf(fout, "\n"); for (i = 1; i < isids_len; i++) { const char *s = initial_sid_to_string[i]; fprintf(fout, "#define SECINITSID_%s", s); for (j = 0; j < max(1, 40 - strlen(s)); j++) fprintf(fout, " "); fprintf(fout, "%2d\n", i); } fprintf(fout, "\n#define SECINITSID_NUM %d\n", i-1); fprintf(fout, "\nstatic inline bool security_is_socket_class(u16 kern_tclass)\n"); fprintf(fout, "{\n"); fprintf(fout, "\tbool sock = false;\n\n"); fprintf(fout, "\tswitch (kern_tclass) {\n"); for (i = 0; secclass_map[i].name; i++) { struct security_class_mapping *map = &secclass_map[i]; substr = strstr(map->name, needle); if (substr && strcmp(substr, needle) == 0) fprintf(fout, "\tcase SECCLASS_%s:\n", map->name); } fprintf(fout, "\t\tsock = true;\n"); fprintf(fout, "\t\tbreak;\n"); fprintf(fout, "\tdefault:\n"); fprintf(fout, "\t\tbreak;\n"); fprintf(fout, "\t}\n\n"); fprintf(fout, "\treturn sock;\n"); fprintf(fout, "}\n"); fprintf(fout, "\n#endif\n"); fclose(fout); fout = fopen(argv[2], "w"); if (!fout) { fprintf(stderr, "Could not open %s for writing: %s\n", argv[2], strerror(errno)); exit(4); } fprintf(fout, "/* This file is automatically generated. Do not edit. */\n"); fprintf(fout, "#ifndef _SELINUX_AV_PERMISSIONS_H_\n#define _SELINUX_AV_PERMISSIONS_H_\n\n"); for (i = 0; secclass_map[i].name; i++) { struct security_class_mapping *map = &secclass_map[i]; for (j = 0; map->perms[j]; j++) { if (j >= 32) { fprintf(stderr, "Too many permissions to fit into an access vector at (%s, %s).\n", map->name, map->perms[j]); exit(5); } fprintf(fout, "#define %s__%s", map->name, map->perms[j]); for (k = 0; k < max(1, 40 - strlen(map->name) - strlen(map->perms[j])); k++) fprintf(fout, " "); fprintf(fout, "0x%08xU\n", (1<<j)); } } fprintf(fout, "\n#endif\n"); fclose(fout); exit(0); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen D. Smalley61880.16%250.00%
Harry Ciao15219.71%125.00%
James Morris10.13%125.00%
Total771100.00%4100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Stephen D. Smalley76882.40%222.22%
Harry Ciao15216.31%111.11%
Paul Moore40.43%111.11%
Nicolas Iooss30.32%111.11%
Alan Cox20.21%111.11%
Greg Kroah-Hartman10.11%111.11%
Eric Paris10.11%111.11%
James Morris10.11%111.11%
Total932100.00%9100.00%
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