91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/*-
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* Copyright 1998 Juniper Networks, Inc.
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* All rights reserved.
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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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*
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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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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <pwd.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_modules.h>
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#include "pam_mod_misc.h"
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#define PASSWORD_PROMPT "Password:"
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PAM_EXTERN int
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pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc,
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const char **argv)
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{
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int retval;
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const char *user;
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const char *password;
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struct passwd *pwd;
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char *encrypted;
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int options;
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int i;
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options = 0;
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for (i = 0; i < argc; i++)
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pam_std_option(&options, argv[i]);
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if ((retval = pam_get_user(pamh, &user, NULL)) != PAM_SUCCESS)
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return retval;
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if ((retval = pam_get_pass(pamh, &password, PASSWORD_PROMPT,
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options)) != PAM_SUCCESS)
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return retval;
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if ((pwd = getpwnam(user)) != NULL) {
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encrypted = crypt(password, pwd->pw_passwd);
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if (password[0] == '\0' && pwd->pw_passwd != '\0')
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encrypted = ":";
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retval = strcmp(encrypted, pwd->pw_passwd) == 0 ?
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PAM_SUCCESS : PAM_AUTH_ERR;
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} else {
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/*
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* User unknown. Encrypt anyway so that it takes the
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* same amount of time.
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*/
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crypt(password, "xx");
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retval = PAM_AUTH_ERR;
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}
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/*
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* The PAM infrastructure will obliterate the cleartext
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* password before returning to the application.
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*/
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return retval;
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}
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PAM_EXTERN int
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pam_sm_setcred(pam_handle_t *pamh, int flags, int argc, const char **argv)
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{
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return PAM_SUCCESS;
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}
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PAM_MODULE_ENTRY("pam_unix");
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