+++ /dev/null
-/*
- * (c) 2006 Quest Software, Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither the name of Quest Software, Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from this
- * software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-
-#include <stdlib.h>
-#include <sys/types.h>
-#include <pwd.h>
-#include <string.h>
-#include <errno.h>
-#include <stdio.h>
-#include <dlfcn.h>
-
-#include <vas.h>
-
-#include "compat.h"
-#include "logging.h"
-#include "nonunix.h"
-#include "sudo.h"
-#include "parse.h"
-
-
-/* Pseudo-boolean types */
-#undef TRUE
-#undef FALSE
-#define FALSE 0
-#define TRUE 1
-
-
-static vas_ctx_t *sudo_vas_ctx;
-static vas_id_t *sudo_vas_id;
-/* Don't use VAS_NAME_FLAG_NO_CACHE or lookups just won't work.
- * -tedp, 2006-08-29 */
-static const int update_flags = 0;
-static int sudo_vas_available = 0;
-static char *err_msg = NULL;
-static void *libvas_handle = NULL;
-
-/* libvas functions */
-static vas_err_t (*v_ctx_alloc) (vas_ctx_t **ctx);
-static void (*v_ctx_free) (vas_ctx_t *ctx);
-static vas_err_t (*v_id_alloc) (vas_ctx_t *ctx, const char *name, vas_id_t **id);
-static void (*v_id_free) (vas_ctx_t *ctx, vas_id_t *id);
-static vas_err_t (*v_id_establish_cred_keytab) (vas_ctx_t *ctx, vas_id_t *id, int credflags, const char *keytab);
-static vas_err_t (*v_user_init) (vas_ctx_t *ctx, vas_id_t *id, const char *name, int flags, vas_user_t **user);
-static void (*v_user_free) (vas_ctx_t *ctx, vas_user_t *user);
-static vas_err_t (*v_group_init) (vas_ctx_t *ctx, vas_id_t *id, const char *name, int flags, vas_group_t **group);
-static void (*v_group_free) (vas_ctx_t *ctx, vas_group_t *group);
-static vas_err_t (*v_user_is_member) (vas_ctx_t *ctx, vas_id_t *id, vas_user_t *user, vas_group_t *group);
-static const char* (*v_err_get_string) (vas_ctx_t *ctx, int with_cause);
-
-
-static int resolve_vas_funcs(void);
-
-
-/**
- * Whether nonunix group lookups are available.
- * @return 1 if available, 0 if not.
- */
-int
-sudo_nonunix_groupcheck_available(void)
-{
- return sudo_vas_available;
-}
-
-
-/**
- * Check if the user is in the group
- * @param group group name which can be in DOMAIN\sam format or just the group
- * name
- * @param user user name
- * @param pwd (unused)
- * @return 1 if user is a member of the group, 0 if not (or error occurred)
- */
-int
-sudo_nonunix_groupcheck( const char* group, const char* user, const struct passwd* pwd )
-{
- static int error_cause_shown = FALSE;
- int rval = FALSE;
- vas_err_t vaserr;
- vas_user_t* vas_user = NULL;
- vas_group_t* vas_group = NULL;
-
- if (!sudo_vas_available) {
- if (error_cause_shown == FALSE) {
- /* Produce the saved error reason */
- warningx("Non-unix group checking unavailable: %s",
- err_msg ? err_msg
- : "(unknown cause)");
- error_cause_shown = TRUE;
- }
- return 0;
- }
-
- /* resolve the user and group. The user will be a real Unix account name,
- * while the group may be a unix name, or any group name accepted by
- * vas_name_to_dn, which means any of:
- * - Group Name
- * - Group Name@FULLY.QUALIFIED.DOMAIN
- * - CN=sudoers,CN=Users,DC=rcdev,DC=vintela,DC=com
- * - S-1-2-34-5678901234-5678901234-5678901234-567
- *
- * XXX - we may get non-VAS user accounts here. You can add local users to an
- * Active Directory group through override files. Should we handle that case?
- * */
- if( (vaserr = v_user_init( sudo_vas_ctx, sudo_vas_id, user, update_flags, &vas_user )) != VAS_ERR_SUCCESS ) {
- if (vaserr == VAS_ERR_NOT_FOUND) {
- /* No such user in AD. Probably a local user. */
- vaserr = VAS_ERR_SUCCESS;
- }
- goto FINISHED;
- }
-
- if( (vaserr = v_group_init( sudo_vas_ctx, sudo_vas_id, group, update_flags, &vas_group )) != VAS_ERR_SUCCESS ) {
- goto FINISHED;
- }
-
- /* do the membership check */
- if( (vaserr = v_user_is_member( sudo_vas_ctx, sudo_vas_id, vas_user, vas_group )) == VAS_ERR_SUCCESS ) {
- rval = TRUE;
- }
- else if (vaserr == VAS_ERR_NOT_FOUND) {
- /* fake the vaserr code so no error is triggered */
- vaserr = VAS_ERR_SUCCESS;
- }
-
-
-FINISHED: /* cleanups */
- if (vaserr != VAS_ERR_SUCCESS && vaserr != VAS_ERR_NOT_FOUND ) {
- warningx("Error while checking group membership "
- "for user \"%s\", group \"%s\", error: %s%s.", user, group,
- v_err_get_string(sudo_vas_ctx, 1),
- /* A helpful hint if there seems to be a non-FQDN as the domain */
- (strchr(group, '@') && !strchr(group, '.'))
- ? "\nMake sure the fully qualified domain name is specified"
- : "");
- }
- if( vas_group ) v_group_free( sudo_vas_ctx, vas_group );
- if( vas_user ) v_user_free( sudo_vas_ctx, vas_user );
-
- return(rval);
-}
-
-
-static void
-set_err_msg(const char *msg, ...) {
- va_list ap;
-
- if (!msg) /* assert */
- return;
-
- if (err_msg)
- free(err_msg);
-
- va_start(ap, msg);
-
- if (vasprintf(&err_msg, msg, ap) == -1)
- err_msg = NULL;
-
- va_end(ap);
-}
-
-
-/**
- * Initialise nonunix_groupcheck state.
- */
-void
-sudo_nonunix_groupcheck_init(void)
-{
- vas_err_t vaserr;
- void *libvas;
-
- if (err_msg) {
- free(err_msg);
- err_msg = NULL;
- }
-
- libvas = dlopen(LIBVAS_SO, RTLD_LAZY);
- if (!libvas) {
- set_err_msg("dlopen() failed: %s", dlerror());
- return;
- }
-
- libvas_handle = libvas;
-
- if (resolve_vas_funcs() != 0)
- return;
-
- if (VAS_ERR_SUCCESS == (vaserr = v_ctx_alloc(&sudo_vas_ctx))) {
-
- if (VAS_ERR_SUCCESS == (vaserr = v_id_alloc(sudo_vas_ctx, "host/", &sudo_vas_id))) {
-
- if (update_flags & VAS_NAME_FLAG_NO_LDAP) {
- sudo_vas_available = 1;
- return; /* OK */
- } else { /* Get a keytab */
- if ((vaserr = v_id_establish_cred_keytab( sudo_vas_ctx,
- sudo_vas_id,
- VAS_ID_FLAG_USE_MEMORY_CCACHE
- | VAS_ID_FLAG_KEEP_COPY_OF_CRED
- | VAS_ID_FLAG_NO_INITIAL_TGT,
- NULL )) == VAS_ERR_SUCCESS) {
- sudo_vas_available = 1;
- return; /* OK */
- }
-
- if (!err_msg)
- set_err_msg("unable to establish creds: %s",
- v_err_get_string(sudo_vas_ctx, 1));
- }
-
- v_id_free(sudo_vas_ctx, sudo_vas_id);
- sudo_vas_id = NULL;
- }
-
- /* This is the last opportunity to get an error message from libvas */
- if (!err_msg)
- set_err_msg("Error initializing non-unix group checking: %s",
- v_err_get_string(sudo_vas_ctx, 1));
-
- v_ctx_free(sudo_vas_ctx);
- sudo_vas_ctx = NULL;
- }
-
- if (!err_msg)
- set_err_msg("Failed to get a libvas handle for non-unix group checking (unknown cause)");
-
- sudo_vas_available = 0;
-}
-
-
-/**
- * Clean up nonunix_groupcheck state.
- */
-void
-sudo_nonunix_groupcheck_cleanup()
-{
- if (err_msg) {
- free(err_msg);
- err_msg = NULL;
- }
-
- if (sudo_vas_available) {
- v_id_free(sudo_vas_ctx, sudo_vas_id);
- sudo_vas_id = NULL;
-
- v_ctx_free(sudo_vas_ctx);
- sudo_vas_ctx = NULL;
-
- sudo_vas_available = FALSE;
- }
-
- if (libvas_handle) {
- if (dlclose(libvas_handle) != 0)
- warningx("dlclose() failed: %s", dlerror());
- libvas_handle = NULL;
- }
-}
-
-#define RESOLVE_OR_ERR(fptr, sym) \
- do { \
- void *_fptr = dlsym(libvas_handle, (sym)); \
- if (!_fptr) { \
- set_err_msg("dlsym() failed: %s", dlerror()); \
- return -1; \
- } \
- fptr = _fptr; \
- } while (0)
-
-
-/**
- * Resolve all the libvas functions.
- * Returns -1 and sets err_msg if something went wrong, or 0 on success.
- */
-int
-resolve_vas_funcs(void)
-{
- if (!libvas_handle) /* assert */
- return -1;
-
- RESOLVE_OR_ERR(v_ctx_alloc, "vas_ctx_alloc");
- RESOLVE_OR_ERR(v_ctx_free, "vas_ctx_free");
- RESOLVE_OR_ERR(v_id_alloc, "vas_id_alloc");
- RESOLVE_OR_ERR(v_id_free, "vas_id_free");
- RESOLVE_OR_ERR(v_id_establish_cred_keytab, "vas_id_establish_cred_keytab");
- RESOLVE_OR_ERR(v_user_init, "vas_user_init");
- RESOLVE_OR_ERR(v_user_free, "vas_user_free");
- RESOLVE_OR_ERR(v_group_init, "vas_group_init");
- RESOLVE_OR_ERR(v_group_free, "vas_group_free");
- RESOLVE_OR_ERR(v_user_is_member, "vas_user_is_member");
- RESOLVE_OR_ERR(v_err_get_string, "vas_err_get_string");
-
- return 0;
-}
projects / debian / sudo / blobdiff