5e53a4f90f
Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
158 lines
4.8 KiB
C
158 lines
4.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright 2000 James Bloom
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* All rights reserved.
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* Based upon code Copyright 1998 Juniper Networks, Inc.
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* Copyright (c) 2001-2003 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* Portions of this software were developed for the FreeBSD Project by
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* ThinkSec AS and NAI Labs, the Security Research Division of Network
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* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
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* ("CBOSS"), as part of the DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <opie.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define PAM_SM_AUTH
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#include <security/pam_appl.h>
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#include <security/pam_modules.h>
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#include <security/pam_mod_misc.h>
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#define PAM_OPT_NO_FAKE_PROMPTS "no_fake_prompts"
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PAM_EXTERN int
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pam_sm_authenticate(pam_handle_t *pamh, int flags __unused,
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int argc __unused, const char *argv[] __unused)
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{
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struct opie opie;
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struct passwd *pwd;
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int retval, i;
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const char *(promptstr[]) = { "%s\nPassword: ", "%s\nPassword [echo on]: "};
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char challenge[OPIE_CHALLENGE_MAX + 1];
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char principal[OPIE_PRINCIPAL_MAX];
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const char *user;
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char *response;
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int style;
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user = NULL;
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if (openpam_get_option(pamh, PAM_OPT_AUTH_AS_SELF)) {
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if ((pwd = getpwnam(getlogin())) == NULL)
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return (PAM_AUTH_ERR);
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user = pwd->pw_name;
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}
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else {
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retval = pam_get_user(pamh, &user, NULL);
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if (retval != PAM_SUCCESS)
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return (retval);
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}
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PAM_LOG("Got user: %s", user);
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/*
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* Watch out: libopie feels entitled to truncate the user name
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* passed to it if it's longer than OPIE_PRINCIPAL_MAX, which is
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* not uncommon in Windows environments.
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*/
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if (strlen(user) >= sizeof(principal))
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return (PAM_AUTH_ERR);
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strlcpy(principal, user, sizeof(principal));
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/*
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* Don't call the OPIE atexit() handler when our program exits,
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* since the module has been unloaded and we will SEGV.
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*/
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opiedisableaeh();
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/*
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* If the no_fake_prompts option was given, and the user
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* doesn't have an OPIE key, just fail rather than present the
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* user with a bogus OPIE challenge.
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*/
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if (opiechallenge(&opie, principal, challenge) != 0 &&
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openpam_get_option(pamh, PAM_OPT_NO_FAKE_PROMPTS))
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return (PAM_AUTH_ERR);
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/*
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* It doesn't make sense to use a password that has already been
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* typed in, since we haven't presented the challenge to the user
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* yet, so clear the stored password.
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*/
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pam_set_item(pamh, PAM_AUTHTOK, NULL);
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style = PAM_PROMPT_ECHO_OFF;
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for (i = 0; i < 2; i++) {
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retval = pam_prompt(pamh, style, &response,
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promptstr[i], challenge);
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if (retval != PAM_SUCCESS) {
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opieunlock();
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return (retval);
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}
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PAM_LOG("Completed challenge %d: %s", i, response);
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if (response[0] != '\0')
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break;
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/* Second time round, echo the password */
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style = PAM_PROMPT_ECHO_ON;
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}
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pam_set_item(pamh, PAM_AUTHTOK, response);
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/*
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* Opieverify is supposed to return -1 only if an error occurs.
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* But it returns -1 even if the response string isn't in the form
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* it expects. Thus we can't log an error and can only check for
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* success or lack thereof.
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*/
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retval = opieverify(&opie, response);
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free(response);
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return (retval == 0 ? PAM_SUCCESS : PAM_AUTH_ERR);
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}
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PAM_EXTERN int
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pam_sm_setcred(pam_handle_t *pamh __unused, int flags __unused,
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int argc __unused, const char *argv[] __unused)
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{
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return (PAM_SUCCESS);
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}
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PAM_MODULE_ENTRY("pam_opie");
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