1 /* $NetBSD: pam_authenticate.c,v 1.3 2017/05/06 19:50:09 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 5 * Copyright (c) 2004-2017 Dag-Erling Smørgrav 6 * All rights reserved. 7 * 8 * This software was developed for the FreeBSD Project by ThinkSec AS and 9 * Network Associates Laboratories, the Security Research Division of 10 * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 11 * ("CBOSS"), as part of the DARPA CHATS research program. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. The name of the author may not be used to endorse or promote 22 * products derived from this software without specific prior written 23 * permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * $OpenPAM: pam_authenticate.c 938 2017-04-30 21:34:42Z des $ 38 */ 39 40 #ifdef HAVE_CONFIG_H 41 # include "config.h" 42 #endif 43 44 #include <sys/cdefs.h> 45 __RCSID("$NetBSD: pam_authenticate.c,v 1.3 2017/05/06 19:50:09 christos Exp $"); 46 47 #include <sys/param.h> 48 49 #include <security/pam_appl.h> 50 51 #include "openpam_impl.h" 52 53 /* 54 * XSSO 4.2.1 55 * XSSO 6 page 34 56 * 57 * Perform authentication within the PAM framework 58 */ 59 60 int 61 pam_authenticate(pam_handle_t *pamh, 62 int flags) 63 { 64 int r; 65 66 ENTER(); 67 if (flags & ~(PAM_SILENT|PAM_DISALLOW_NULL_AUTHTOK)) 68 RETURNC(PAM_BAD_CONSTANT); 69 r = openpam_dispatch(pamh, PAM_SM_AUTHENTICATE, flags); 70 pam_set_item(pamh, PAM_AUTHTOK, NULL); 71 RETURNC(r); 72 } 73 74 /* 75 * Error codes: 76 * 77 * =openpam_dispatch 78 * =pam_sm_authenticate 79 * !PAM_IGNORE 80 * PAM_BAD_CONSTANT 81 */ 82 83 /** 84 * The =pam_authenticate function attempts to authenticate the user 85 * associated with the pam context specified by the =pamh argument. 86 * 87 * The application is free to call =pam_authenticate as many times as it 88 * wishes, but some modules may maintain an internal retry counter and 89 * return =PAM_MAXTRIES when it exceeds some preset or hardcoded limit. 90 * 91 * The =flags argument is the binary or of zero or more of the following 92 * values: 93 * 94 * =PAM_SILENT: 95 * Do not emit any messages. 96 * =PAM_DISALLOW_NULL_AUTHTOK: 97 * Fail if the user's authentication token is null. 98 * 99 * If any other bits are set, =pam_authenticate will return 100 * =PAM_BAD_CONSTANT. 101 */ 102