edfeee6a7a
group plugin. We can just use the main sudo API macros. The sudoers group plugin macros are preserved for source compatibility but are not documented.
128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
/*
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* Copyright (c) 2010-2014 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <config.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_STDBOOL_H
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# include <stdbool.h>
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#else
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# include "compat/stdbool.h"
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#endif /* HAVE_STDBOOL_H */
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif /* HAVE_STRINGS_H */
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#include <unistd.h>
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <grp.h>
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#include <pwd.h>
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#include "sudo_plugin.h"
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#include "sudo_compat.h"
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/*
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* Sample sudoers group plugin that uses an extra group file with the
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* same format as /etc/group.
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*/
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static sudo_printf_t sudo_log;
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extern void mysetgrfile(const char *);
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extern void mysetgrent(void);
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extern void myendgrent(void);
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extern struct group *mygetgrnam(const char *);
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static int
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sample_init(int version, sudo_printf_t sudo_printf, char *const argv[])
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{
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struct stat sb;
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sudo_log = sudo_printf;
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if (SUDO_API_VERSION_GET_MAJOR(version) != GROUP_API_VERSION_MAJOR) {
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sudo_log(SUDO_CONV_ERROR_MSG,
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"group_file: incompatible major version %d, expected %d\n",
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SUDO_API_VERSION_GET_MAJOR(version),
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GROUP_API_VERSION_MAJOR);
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return -1;
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}
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/* Sanity check the specified group file. */
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if (argv == NULL || argv[0] == NULL) {
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sudo_log(SUDO_CONV_ERROR_MSG,
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"group_file: path to group file not specified\n");
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return -1;
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}
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if (stat(argv[0], &sb) != 0) {
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sudo_log(SUDO_CONV_ERROR_MSG,
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"group_file: %s: %s\n", argv[0], strerror(errno));
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return -1;
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}
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if ((sb.st_mode & (S_IWGRP|S_IWOTH)) != 0) {
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sudo_log(SUDO_CONV_ERROR_MSG,
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"%s must be only be writable by owner\n", argv[0]);
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return -1;
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}
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mysetgrfile(argv[0]);
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mysetgrent();
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return true;
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}
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static void
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sample_cleanup(void)
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{
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myendgrent();
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}
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/*
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* Returns true if "user" is a member of "group", else false.
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*/
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static int
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sample_query(const char *user, const char *group, const struct passwd *pwd)
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{
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struct group *grp;
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char **member;
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grp = mygetgrnam(group);
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if (grp != NULL && grp->gr_mem != NULL) {
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for (member = grp->gr_mem; *member != NULL; member++) {
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if (strcasecmp(user, *member) == 0)
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return true;
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}
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}
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return false;
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}
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__dso_public struct sudoers_group_plugin group_plugin = {
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GROUP_API_VERSION,
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sample_init,
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sample_cleanup,
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sample_query
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};
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