/*
- * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
- * All rights reserved
- * Copyright (c) 2000 Markus Friedl. All rights reserved.
+ * Copyright (c) 2000 Markus Friedl. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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.
*/
#include "includes.h"
-RCSID("$OpenBSD: auth.c,v 1.7 2000/05/17 21:37:24 deraadt Exp $");
+RCSID("$OpenBSD: auth.c,v 1.21 2001/03/19 17:07:23 markus Exp $");
-#include "xmalloc.h"
-#include "rsa.h"
-#include "ssh.h"
-#include "pty.h"
-#include "packet.h"
-#include "buffer.h"
-#include "cipher.h"
-#include "mpaux.h"
-#include "servconf.h"
-#include "compat.h"
-#include "channels.h"
-#include "match.h"
#ifdef HAVE_LOGIN_H
#include <login.h>
#endif
#include <shadow.h>
#endif /* defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) */
-#include "bufaux.h"
-#include "ssh2.h"
+#include "xmalloc.h"
+#include "match.h"
+#include "groupaccess.h"
+#include "log.h"
+#include "servconf.h"
#include "auth.h"
-#include "session.h"
-#include "dispatch.h"
-
+#include "auth-options.h"
+#include "canohost.h"
/* import */
extern ServerOptions options;
-extern char *forced_command;
/*
- * Check if the user is allowed to log in via ssh. If user is listed in
- * DenyUsers or user's primary group is listed in DenyGroups, false will
- * be returned. If AllowUsers isn't empty and user isn't listed there, or
- * if AllowGroups isn't empty and user isn't listed there, false will be
- * returned.
+ * Check if the user is allowed to log in via ssh. If user is listed
+ * in DenyUsers or one of user's groups is listed in DenyGroups, false
+ * will be returned. If AllowUsers isn't empty and user isn't listed
+ * there, or if AllowGroups isn't empty and one of user's groups isn't
+ * listed there, false will be returned.
* If the user's shell is not executable, false will be returned.
* Otherwise true is returned.
*/
allowed_user(struct passwd * pw)
{
struct stat st;
- struct group *grp;
char *shell;
int i;
#ifdef WITH_AIXAUTHENTICATE
char *loginmsg;
#endif /* WITH_AIXAUTHENTICATE */
-#if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) && \
- defined(HAS_SHADOW_EXPIRE)
- struct spwd *spw;
+#if !defined(USE_PAM) && defined(HAVE_SHADOW_H) && \
+ !defined(DISABLE_SHADOW) && defined(HAS_SHADOW_EXPIRE)
+ struct spwd *spw;
/* Shouldn't be called if pw is NULL, but better safe than sorry... */
- if (!pw)
+ if (!pw || !pw->pw_name)
return 0;
spw = getspnam(pw->pw_name);
- if (spw == NULL)
- return 0;
-
- /* Check account expiry */
- if ((spw->sp_expire > 0) && ((time(NULL) / 86400) > spw->sp_expire))
- return 0;
+ if (spw != NULL) {
+ int days = time(NULL) / 86400;
- /* Check password expiry */
- if ((spw->sp_lstchg > 0) && (spw->sp_inact > 0) &&
- ((time(NULL) / 86400) > (spw->sp_lstchg + spw->sp_inact)))
- return 0;
+ /* Check account expiry */
+ if ((spw->sp_expire >= 0) && (days > spw->sp_expire))
+ return 0;
+
+ /* Check password expiry */
+ if ((spw->sp_lstchg >= 0) && (spw->sp_max >= 0) &&
+ (days > (spw->sp_lstchg + spw->sp_max)))
+ return 0;
+ }
#else
/* Shouldn't be called if pw is NULL, but better safe than sorry... */
- if (!pw)
+ if (!pw || !pw->pw_name)
return 0;
#endif
/* Return false if user is listed in DenyUsers */
if (options.num_deny_users > 0) {
- if (!pw->pw_name)
- return 0;
for (i = 0; i < options.num_deny_users; i++)
if (match_pattern(pw->pw_name, options.deny_users[i]))
return 0;
}
/* Return false if AllowUsers isn't empty and user isn't listed there */
if (options.num_allow_users > 0) {
- if (!pw->pw_name)
- return 0;
for (i = 0; i < options.num_allow_users; i++)
if (match_pattern(pw->pw_name, options.allow_users[i]))
break;
if (i >= options.num_allow_users)
return 0;
}
- /* Get the primary group name if we need it. Return false if it fails */
if (options.num_deny_groups > 0 || options.num_allow_groups > 0) {
- grp = getgrgid(pw->pw_gid);
- if (!grp)
+ /* Get the user's group access list (primary and supplementary) */
+ if (ga_init(pw->pw_name, pw->pw_gid) == 0)
return 0;
- /* Return false if user's group is listed in DenyGroups */
- if (options.num_deny_groups > 0) {
- if (!grp->gr_name)
+ /* Return false if one of user's groups is listed in DenyGroups */
+ if (options.num_deny_groups > 0)
+ if (ga_match(options.deny_groups,
+ options.num_deny_groups)) {
+ ga_free();
return 0;
- for (i = 0; i < options.num_deny_groups; i++)
- if (match_pattern(grp->gr_name, options.deny_groups[i]))
- return 0;
- }
+ }
/*
- * Return false if AllowGroups isn't empty and user's group
+ * Return false if AllowGroups isn't empty and one of user's groups
* isn't listed there
*/
- if (options.num_allow_groups > 0) {
- if (!grp->gr_name)
- return 0;
- for (i = 0; i < options.num_allow_groups; i++)
- if (match_pattern(grp->gr_name, options.allow_groups[i]))
- break;
- /* i < options.num_allow_groups iff we break for
- loop */
- if (i >= options.num_allow_groups)
+ if (options.num_allow_groups > 0)
+ if (!ga_match(options.allow_groups,
+ options.num_allow_groups)) {
+ ga_free();
return 0;
- }
+ }
+ ga_free();
}
#ifdef WITH_AIXAUTHENTICATE
/* We found no reason not to let this user try to log on... */
return 1;
}
+
+Authctxt *
+authctxt_new(void)
+{
+ Authctxt *authctxt = xmalloc(sizeof(*authctxt));
+ memset(authctxt, 0, sizeof(*authctxt));
+ return authctxt;
+}
+
+void
+auth_log(Authctxt *authctxt, int authenticated, char *method, char *info)
+{
+ void (*authlog) (const char *fmt,...) = verbose;
+ char *authmsg;
+
+ /* Raise logging level */
+ if (authenticated == 1 ||
+ !authctxt->valid ||
+ authctxt->failures >= AUTH_FAIL_LOG ||
+ strcmp(method, "password") == 0)
+ authlog = log;
+
+ if (authctxt->postponed)
+ authmsg = "Postponed";
+ else
+ authmsg = authenticated ? "Accepted" : "Failed";
+
+ authlog("%s %s for %s%.100s from %.200s port %d%s",
+ authmsg,
+ method,
+ authctxt->valid ? "" : "illegal user ",
+ authctxt->valid && authctxt->pw->pw_uid == 0 ? "ROOT" : authctxt->user,
+ get_remote_ipaddr(),
+ get_remote_port(),
+ info);
+}
+
+/*
+ * Check whether root logins are disallowed.
+ */
+int
+auth_root_allowed(char *method)
+{
+ switch (options.permit_root_login) {
+ case PERMIT_YES:
+ return 1;
+ break;
+ case PERMIT_NO_PASSWD:
+ if (strcmp(method, "password") != 0)
+ return 1;
+ break;
+ case PERMIT_FORCED_ONLY:
+ if (forced_command) {
+ log("Root login accepted for forced command.");
+ return 1;
+ }
+ break;
+ }
+ log("ROOT LOGIN REFUSED FROM %.200s", get_remote_ipaddr());
+ return 0;
+}
andersk / openssh.git / blobdiff