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-rw-r--r--modules/pam_wheel/pam_wheel.c317
1 files changed, 0 insertions, 317 deletions
diff --git a/modules/pam_wheel/pam_wheel.c b/modules/pam_wheel/pam_wheel.c
deleted file mode 100644
index ca0e171d..00000000
--- a/modules/pam_wheel/pam_wheel.c
+++ /dev/null
@@ -1,317 +0,0 @@
-/* pam_wheel module */
-
-/*
- * Written by Cristian Gafton <gafton@redhat.com> 1996/09/10
- * See the end of the file for Copyright Information
- *
- *
- * 1.2 - added 'deny' and 'group=' options
- * 1.1 - added 'trust' option
- * 1.0 - the code is working for at least another person, so... :-)
- * 0.1 - use vsyslog instead of vfprintf/syslog in _pam_log
- * - return PAM_IGNORE on success (take care of sloppy sysadmins..)
- * - use pam_get_user instead of pam_get_item(...,PAM_USER,...)
- * - a new arg use_uid to auth the current uid instead of the
- * initial (logged in) one.
- * 0.0 - first release
- *
- * TODO:
- * - try to use make_remark from pam_unix/support.c
- * - consider returning on failure PAM_FAIL_NOW if the user is not
- * a wheel member.
- */
-
-#include "config.h"
-
-#include <stdio.h>
-#include <unistd.h>
-#include <string.h>
-#include <syslog.h>
-#include <stdarg.h>
-#include <sys/types.h>
-#include <pwd.h>
-#include <grp.h>
-
-/*
- * here, we make a definition for the externally accessible function
- * in this file (this definition is required for static a module
- * but strongly encouraged generally) it is used to instruct the
- * modules include file to define the function prototypes.
- */
-
-#define PAM_SM_AUTH
-#define PAM_SM_ACCOUNT
-
-#include <security/pam_modules.h>
-#include <security/pam_modutil.h>
-#include <security/pam_ext.h>
-
-/* checks if a user is on a list of members of the GID 0 group */
-static int is_on_list(char * const *list, const char *member)
-{
- while (list && *list) {
- if (strcmp(*list, member) == 0)
- return 1;
- list++;
- }
- return 0;
-}
-
-/* argument parsing */
-
-#define PAM_DEBUG_ARG 0x0001
-#define PAM_USE_UID_ARG 0x0002
-#define PAM_TRUST_ARG 0x0004
-#define PAM_DENY_ARG 0x0010
-#define PAM_ROOT_ONLY_ARG 0x0020
-
-static int
-_pam_parse (const pam_handle_t *pamh, int argc, const char **argv,
- char *use_group, size_t group_length)
-{
- int ctrl=0;
-
- memset(use_group, '\0', group_length);
-
- /* step through arguments */
- for (ctrl=0; argc-- > 0; ++argv) {
-
- /* generic options */
-
- if (!strcmp(*argv,"debug"))
- ctrl |= PAM_DEBUG_ARG;
- else if (!strcmp(*argv,"use_uid"))
- ctrl |= PAM_USE_UID_ARG;
- else if (!strcmp(*argv,"trust"))
- ctrl |= PAM_TRUST_ARG;
- else if (!strcmp(*argv,"deny"))
- ctrl |= PAM_DENY_ARG;
- else if (!strcmp(*argv,"root_only"))
- ctrl |= PAM_ROOT_ONLY_ARG;
- else if (!strncmp(*argv,"group=",6))
- strncpy(use_group,*argv+6,group_length-1);
- else {
- pam_syslog(pamh, LOG_ERR, "unknown option: %s", *argv);
- }
- }
-
- return ctrl;
-}
-
-static int
-perform_check (pam_handle_t *pamh, int ctrl, const char *use_group)
-{
- const char *username = NULL;
- const char *fromsu;
- struct passwd *pwd, *tpwd = NULL;
- struct group *grp;
- int retval = PAM_AUTH_ERR;
-
- retval = pam_get_user(pamh, &username, NULL);
- if ((retval != PAM_SUCCESS) || (!username)) {
- if (ctrl & PAM_DEBUG_ARG) {
- pam_syslog(pamh, LOG_DEBUG, "can not get the username");
- }
- return PAM_SERVICE_ERR;
- }
-
- pwd = pam_modutil_getpwnam (pamh, username);
- if (!pwd) {
- if (ctrl & PAM_DEBUG_ARG) {
- pam_syslog(pamh, LOG_NOTICE, "unknown user %s", username);
- }
- return PAM_USER_UNKNOWN;
- }
- if (ctrl & PAM_ROOT_ONLY_ARG) {
- /* su to a non uid 0 account ? */
- if (pwd->pw_uid != 0) {
- return PAM_IGNORE;
- }
- }
-
- if (ctrl & PAM_USE_UID_ARG) {
- tpwd = pam_modutil_getpwuid (pamh, getuid());
- if (!tpwd) {
- if (ctrl & PAM_DEBUG_ARG) {
- pam_syslog(pamh, LOG_NOTICE, "who is running me ?!");
- }
- return PAM_SERVICE_ERR;
- }
- fromsu = tpwd->pw_name;
- } else {
- fromsu = pam_modutil_getlogin(pamh);
- if (fromsu) {
- tpwd = pam_modutil_getpwnam (pamh, fromsu);
- }
- if (!fromsu || !tpwd) {
- if (ctrl & PAM_DEBUG_ARG) {
- pam_syslog(pamh, LOG_NOTICE, "who is running me ?!");
- }
- return PAM_SERVICE_ERR;
- }
- }
-
- /*
- * At this point fromsu = username-of-invoker; tpwd = pwd ptr for fromsu
- */
-
- if (!use_group[0]) {
- if ((grp = pam_modutil_getgrnam (pamh, "wheel")) == NULL) {
- grp = pam_modutil_getgrgid (pamh, 0);
- }
- } else {
- grp = pam_modutil_getgrnam (pamh, use_group);
- }
-
- if (!grp || (!grp->gr_mem && (tpwd->pw_gid != grp->gr_gid))) {
- if (ctrl & PAM_DEBUG_ARG) {
- if (!use_group[0]) {
- pam_syslog(pamh, LOG_NOTICE, "no members in a GID 0 group");
- } else {
- pam_syslog(pamh, LOG_NOTICE,
- "no members in '%s' group", use_group);
- }
- }
- if (ctrl & PAM_DENY_ARG) {
- /* if this was meant to deny access to the members
- * of this group and the group does not exist, allow
- * access
- */
- return PAM_IGNORE;
- } else {
- return PAM_AUTH_ERR;
- }
- }
-
- /*
- * test if the user is a member of the group, or if the
- * user has the "wheel" (sic) group as its primary group.
- */
-
- if (is_on_list(grp->gr_mem, fromsu) || (tpwd->pw_gid == grp->gr_gid)) {
-
- if (ctrl & PAM_DENY_ARG) {
- retval = PAM_PERM_DENIED;
-
- } else if (ctrl & PAM_TRUST_ARG) {
- retval = PAM_SUCCESS; /* this can be a sufficient check */
-
- } else {
- retval = PAM_IGNORE;
- }
-
- } else {
-
- if (ctrl & PAM_DENY_ARG) {
-
- if (ctrl & PAM_TRUST_ARG) {
- retval = PAM_SUCCESS; /* this can be a sufficient check */
- } else {
- retval = PAM_IGNORE;
- }
-
- } else {
- retval = PAM_PERM_DENIED;
- }
- }
-
- if (ctrl & PAM_DEBUG_ARG) {
- if (retval == PAM_IGNORE) {
- pam_syslog(pamh, LOG_NOTICE,
- "Ignoring access request '%s' for '%s'",
- fromsu, username);
- } else {
- pam_syslog(pamh, LOG_NOTICE, "Access %s to '%s' for '%s'",
- (retval != PAM_SUCCESS) ? "denied":"granted",
- fromsu, username);
- }
- }
-
- return retval;
-}
-
-/* --- authentication management functions --- */
-
-PAM_EXTERN int
-pam_sm_authenticate (pam_handle_t *pamh, int flags UNUSED,
- int argc, const char **argv)
-{
- char use_group[BUFSIZ];
- int ctrl;
-
- ctrl = _pam_parse(pamh, argc, argv, use_group, sizeof(use_group));
-
- return perform_check(pamh, ctrl, use_group);
-}
-
-PAM_EXTERN int
-pam_sm_setcred (pam_handle_t *pamh UNUSED, int flags UNUSED,
- int argc UNUSED, const char **argv UNUSED)
-{
- return PAM_SUCCESS;
-}
-
-PAM_EXTERN int
-pam_sm_acct_mgmt (pam_handle_t *pamh, int flags UNUSED,
- int argc, const char **argv)
-{
- char use_group[BUFSIZ];
- int ctrl;
-
- ctrl = _pam_parse(pamh, argc, argv, use_group, sizeof(use_group));
-
- return perform_check(pamh, ctrl, use_group);
-}
-
-#ifdef PAM_STATIC
-
-/* static module data */
-
-struct pam_module _pam_wheel_modstruct = {
- "pam_wheel",
- pam_sm_authenticate,
- pam_sm_setcred,
- pam_sm_acct_mgmt,
- NULL,
- NULL,
- NULL,
- NULL,
-};
-
-#endif /* PAM_STATIC */
-
-/*
- * Copyright (c) Cristian Gafton <gafton@redhat.com>, 1996, 1997
- * 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, and the entire permission notice in its entirety,
- * including the disclaimer of warranties.
- * 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. The name of the author may not be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * ALTERNATIVELY, this product may be distributed under the terms of
- * the GNU Public License, in which case the provisions of the GPL are
- * required INSTEAD OF the above restrictions. (This clause is
- * necessary due to a potential bad interaction between the GPL and
- * the restrictions contained in a BSD-style copyright.)
- *
- * THIS SOFTWARE IS PROVIDED `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 AUTHOR 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.
- */
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