diff options
Diffstat (limited to 'stdlib/tst-secure-getenv.c')
| -rw-r--r-- | stdlib/tst-secure-getenv.c | 242 |
1 files changed, 0 insertions, 242 deletions
diff --git a/stdlib/tst-secure-getenv.c b/stdlib/tst-secure-getenv.c deleted file mode 100644 index 2705cf9c5b..0000000000 --- a/stdlib/tst-secure-getenv.c +++ /dev/null @@ -1,242 +0,0 @@ -/* Copyright (C) 2012-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -/* Test that secure_getenv works by invoking the test as a SGID - program with a group ID from the supplementary group list. This - test can fail spuriously if the user is not a member of a suitable - supplementary group. */ - -#include <errno.h> -#include <fcntl.h> -#include <stdlib.h> -#include <stdint.h> -#include <stdio.h> -#include <string.h> -#include <sys/stat.h> -#include <sys/wait.h> -#include <unistd.h> - -#include <support/support.h> -#include <support/test-driver.h> - -static char MAGIC_ARGUMENT[] = "run-actual-test"; -#define MAGIC_STATUS 19 - -/* Return a GID which is not our current GID, but is present in the - supplementary group list. */ -static gid_t -choose_gid (void) -{ - const int count = 64; - gid_t groups[count]; - int ret = getgroups (count, groups); - if (ret < 0) - { - printf ("getgroups: %m\n"); - exit (1); - } - gid_t current = getgid (); - for (int i = 0; i < ret; ++i) - { - if (groups[i] != current) - return groups[i]; - } - return 0; -} - - -/* Copies the executable into a restricted directory, so that we can - safely make it SGID with the TARGET group ID. Then runs the - executable. */ -static int -run_executable_sgid (gid_t target) -{ - char *dirname = xasprintf ("%s/secure-getenv.%jd", - test_dir, (intmax_t) getpid ()); - char *execname = xasprintf ("%s/bin", dirname); - int infd = -1; - int outfd = -1; - int ret = -1; - if (mkdir (dirname, 0700) < 0) - { - printf ("mkdir: %m\n"); - goto err; - } - infd = open ("/proc/self/exe", O_RDONLY); - if (infd < 0) - { - printf ("open (/proc/self/exe): %m\n"); - goto err; - } - outfd = open (execname, O_WRONLY | O_CREAT | O_EXCL, 0700); - if (outfd < 0) - { - printf ("open (%s): %m\n", execname); - goto err; - } - char buf[4096]; - for (;;) - { - ssize_t rdcount = read (infd, buf, sizeof (buf)); - if (rdcount < 0) - { - printf ("read: %m\n"); - goto err; - } - if (rdcount == 0) - break; - char *p = buf; - char *end = buf + rdcount; - while (p != end) - { - ssize_t wrcount = write (outfd, buf, end - p); - if (wrcount == 0) - errno = ENOSPC; - if (wrcount <= 0) - { - printf ("write: %m\n"); - goto err; - } - p += wrcount; - } - } - if (fchown (outfd, getuid (), target) < 0) - { - printf ("fchown (%s): %m\n", execname); - goto err; - } - if (fchmod (outfd, 02750) < 0) - { - printf ("fchmod (%s): %m\n", execname); - goto err; - } - if (close (outfd) < 0) - { - printf ("close (outfd): %m\n"); - goto err; - } - if (close (infd) < 0) - { - printf ("close (infd): %m\n"); - goto err; - } - - int kid = fork (); - if (kid < 0) - { - printf ("fork: %m\n"); - goto err; - } - if (kid == 0) - { - /* Child process. */ - char *args[] = { execname, MAGIC_ARGUMENT, NULL }; - execve (execname, args, environ); - printf ("execve (%s): %m\n", execname); - _exit (1); - } - int status; - if (waitpid (kid, &status, 0) < 0) - { - printf ("waitpid: %m\n"); - goto err; - } - if (!WIFEXITED (status) || WEXITSTATUS (status) != MAGIC_STATUS) - { - printf ("Unexpected exit status %d from child process\n", - status); - goto err; - } - ret = 0; - -err: - if (outfd >= 0) - close (outfd); - if (infd >= 0) - close (infd); - if (execname) - { - unlink (execname); - free (execname); - } - if (dirname) - { - rmdir (dirname); - free (dirname); - } - return ret; -} - -static int -do_test (void) -{ - if (getenv ("PATH") == NULL) - { - printf ("PATH not set\n"); - exit (1); - } - if (secure_getenv ("PATH") == NULL) - { - printf ("PATH not set according to secure_getenv\n"); - exit (1); - } - if (strcmp (getenv ("PATH"), secure_getenv ("PATH")) != 0) - { - printf ("PATH mismatch (%s, %s)\n", - getenv ("PATH"), secure_getenv ("PATH")); - exit (1); - } - - gid_t target = choose_gid (); - if (target == 0) - { - fprintf (stderr, - "Could not find a suitable GID for user %jd, skipping test\n", - (intmax_t) getuid ()); - exit (0); - } - return run_executable_sgid (target); -} - -static void -alternative_main (int argc, char **argv) -{ - if (argc == 2 && strcmp (argv[1], MAGIC_ARGUMENT) == 0) - { - if (getgid () == getegid ()) - { - /* This can happen if the file system is mounted nosuid. */ - fprintf (stderr, "SGID failed: GID and EGID match (%jd)\n", - (intmax_t) getgid ()); - exit (MAGIC_STATUS); - } - if (getenv ("PATH") == NULL) - { - printf ("PATH variable not present\n"); - exit (3); - } - if (secure_getenv ("PATH") != NULL) - { - printf ("PATH variable not filtered out\n"); - exit (4); - } - exit (MAGIC_STATUS); - } -} - -#define PREPARE alternative_main -#include <support/test-driver.c> |