From 5fd83771641d15c418f747bd343ba6738d3875f7 Mon Sep 17 00:00:00 2001 From: Cameron Katri Date: Sun, 9 May 2021 14:20:58 -0400 Subject: Import macOS userland adv_cmds-176 basic_cmds-55 bootstrap_cmds-116.100.1 developer_cmds-66 diskdev_cmds-667.40.1 doc_cmds-53.60.1 file_cmds-321.40.3 mail_cmds-35 misc_cmds-34 network_cmds-606.40.1 patch_cmds-17 remote_cmds-63 shell_cmds-216.60.1 system_cmds-880.60.2 text_cmds-106 --- system_cmds/login.tproj/klogin.c | 207 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 207 insertions(+) create mode 100644 system_cmds/login.tproj/klogin.c (limited to 'system_cmds/login.tproj/klogin.c') diff --git a/system_cmds/login.tproj/klogin.c b/system_cmds/login.tproj/klogin.c new file mode 100644 index 0000000..b9f0927 --- /dev/null +++ b/system_cmds/login.tproj/klogin.c @@ -0,0 +1,207 @@ +/* + * Copyright (c) 1999-2016 Apple Inc. All rights reserved. + * + * @APPLE_LICENSE_HEADER_START@ + * + * "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights + * Reserved. This file contains Original Code and/or Modifications of + * Original Code as defined in and that are subject to the Apple Public + * Source License Version 1.0 (the 'License'). You may not use this file + * except in compliance with the License. Please obtain a copy of the + * License at http://www.apple.com/publicsource and read it before using + * this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, + * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the + * License for the specific language governing rights and limitations + * under the License." + * + * @APPLE_LICENSE_HEADER_END@ + */ +/*- + * Copyright (c) 1990, 1993, 1994 + * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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. + */ + +#ifdef KERBEROS +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#define INITIAL_TICKET "krbtgt" +#define VERIFY_SERVICE "rcmd" + +extern int notickets; +extern char *krbtkfile_env; + +/* + * Attempt to log the user in using Kerberos authentication + * + * return 0 on success (will be logged in) + * 1 if Kerberos failed (try local password in login) + */ +int +klogin(struct passwd *pw, char *instance, char *localhost, char *password) +{ + int kerror; + AUTH_DAT authdata; + KTEXT_ST ticket; + struct hostent *hp; + unsigned long faddr; + char realm[REALM_SZ], savehost[MAXHOSTNAMELEN]; + char tkt_location[MAXPATHLEN]; + char *krb_get_phost(); + + /* + * Root logins don't use Kerberos. + * If we have a realm, try getting a ticket-granting ticket + * and using it to authenticate. Otherwise, return + * failure so that we can try the normal passwd file + * for a password. If that's ok, log the user in + * without issuing any tickets. + */ + if (strcmp(pw->pw_name, "root") == 0 || + krb_get_lrealm(realm, 0) != KSUCCESS) + return (1); + + /* + * get TGT for local realm + * tickets are stored in a file named TKT_ROOT plus uid + * except for user.root tickets. + */ + + if (strcmp(instance, "root") != 0) + (void)sprintf(tkt_location, "%s%d", TKT_ROOT, pw->pw_uid); + else { + (void)sprintf(tkt_location, "%s_root_%d", TKT_ROOT, pw->pw_uid); + krbtkfile_env = tkt_location; + } + (void)krb_set_tkt_string(tkt_location); + + /* + * Set real as well as effective ID to 0 for the moment, + * to make the kerberos library do the right thing. + */ + if (setuid(0) < 0) { + warnx("setuid"); + return (1); + } + kerror = krb_get_pw_in_tkt(pw->pw_name, instance, + realm, INITIAL_TICKET, realm, DEFAULT_TKT_LIFE, password); + /* + * If we got a TGT, get a local "rcmd" ticket and check it so as to + * ensure that we are not talking to a bogus Kerberos server. + * + * There are 2 cases where we still allow a login: + * 1: the VERIFY_SERVICE doesn't exist in the KDC + * 2: local host has no srvtab, as (hopefully) indicated by a + * return value of RD_AP_UNDEC from krb_rd_req(). + */ + if (kerror != INTK_OK) { + if (kerror != INTK_BADPW && kerror != KDC_PR_UNKNOWN) { + syslog(LOG_ERR, "Kerberos intkt error: %s", + krb_err_txt[kerror]); + dest_tkt(); + } + return (1); + } + + if (chown(TKT_FILE, pw->pw_uid, pw->pw_gid) < 0) + syslog(LOG_ERR, "chown tkfile (%s): %m", TKT_FILE); + + (void)strncpy(savehost, krb_get_phost(localhost), sizeof(savehost)); + savehost[sizeof(savehost)-1] = NULL; + + /* + * if the "VERIFY_SERVICE" doesn't exist in the KDC for this host, + * still allow login with tickets, but log the error condition. + */ + + kerror = krb_mk_req(&ticket, VERIFY_SERVICE, savehost, realm, 33); + if (kerror == KDC_PR_UNKNOWN) { + syslog(LOG_NOTICE, + "warning: TGT not verified (%s); %s.%s not registered, or srvtab is wrong?", + krb_err_txt[kerror], VERIFY_SERVICE, savehost); + notickets = 0; + return (0); + } + + if (kerror != KSUCCESS) { + warnx("unable to use TGT: (%s)", krb_err_txt[kerror]); + syslog(LOG_NOTICE, "unable to use TGT: (%s)", + krb_err_txt[kerror]); + dest_tkt(); + return (1); + } + + if (!(hp = gethostbyname(localhost))) { + syslog(LOG_ERR, "couldn't get local host address"); + dest_tkt(); + return (1); + } + + memmove((void *)&faddr, (void *)hp->h_addr, sizeof(faddr)); + + kerror = krb_rd_req(&ticket, VERIFY_SERVICE, savehost, faddr, + &authdata, ""); + + if (kerror == KSUCCESS) { + notickets = 0; + return (0); + } + + /* undecipherable: probably didn't have a srvtab on the local host */ + if (kerror = RD_AP_UNDEC) { + syslog(LOG_NOTICE, "krb_rd_req: (%s)\n", krb_err_txt[kerror]); + dest_tkt(); + return (1); + } + /* failed for some other reason */ + warnx("unable to verify %s ticket: (%s)", VERIFY_SERVICE, + krb_err_txt[kerror]); + syslog(LOG_NOTICE, "couldn't verify %s ticket: %s", VERIFY_SERVICE, + krb_err_txt[kerror]); + dest_tkt(); + return (1); +} +#endif -- cgit v1.2.3-56-ge451