164 lines
4.3 KiB
C
164 lines
4.3 KiB
C
/*-
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by ThinkSec AS and
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* NAI Labs, the Security Research Division of Network Associates, Inc.
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* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
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* 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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* $P4: //depot/projects/openpam/modules/pam_unix/pam_unix.c#1 $
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <security/pam_modules.h>
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#ifndef _OPENPAM
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static char password_prompt[] = "Password:";
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#endif
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#ifndef PAM_EXTERN
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#define PAM_EXTERN
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#endif
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PAM_EXTERN int
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pam_sm_authenticate(pam_handle_t *pamh, int flags,
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int argc, const char *argv[])
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{
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#ifndef _OPENPAM
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struct pam_conv *conv;
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struct pam_message msg;
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const struct pam_message *msgp;
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struct pam_response *resp;
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#endif
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struct passwd *pwd;
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const char *user;
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char *crypt_password, *password;
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int pam_err, retry;
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/* identify user */
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if ((pam_err = pam_get_user(pamh, &user, NULL)) != PAM_SUCCESS)
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return (pam_err);
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if ((pwd = getpwnam(user)) == NULL)
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return (PAM_USER_UNKNOWN);
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/* get password */
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#ifndef _OPENPAM
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pam_err = pam_get_item(pamh, PAM_CONV, (const void **)&conv);
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if (pam_err != PAM_SUCCESS)
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return (PAM_SYSTEM_ERR);
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msg.msg_style = PAM_PROMPT_ECHO_OFF;
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msg.msg = password_prompt;
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msgp = &msg;
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#endif
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for (retry = 0; retry < 3; ++retry) {
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#ifdef _OPENPAM
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pam_err = pam_get_authtok(pamh, PAM_AUTHTOK,
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(const char **)&password, NULL);
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#else
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resp = NULL;
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pam_err = (*conv->conv)(1, &msgp, &resp, conv->appdata_ptr);
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if (resp != NULL) {
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if (pam_err == PAM_SUCCESS)
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password = resp->resp;
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else
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free(resp->resp);
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free(resp);
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}
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#endif
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if (pam_err == PAM_SUCCESS)
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break;
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}
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if (pam_err == PAM_CONV_ERR)
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return (pam_err);
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if (pam_err != PAM_SUCCESS)
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return (PAM_AUTH_ERR);
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/* compare passwords */
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if ((!pwd->pw_passwd[0] && (flags & PAM_DISALLOW_NULL_AUTHTOK)) ||
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(crypt_password = crypt(password, pwd->pw_passwd)) == NULL ||
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strcmp(crypt_password, pwd->pw_passwd) != 0)
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pam_err = PAM_AUTH_ERR;
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else
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pam_err = PAM_SUCCESS;
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#ifndef _OPENPAM
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free(password);
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#endif
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return (pam_err);
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}
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PAM_EXTERN int
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pam_sm_setcred(pam_handle_t *pamh, int flags,
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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_EXTERN int
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pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
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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_EXTERN int
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pam_sm_open_session(pam_handle_t *pamh, int flags,
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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_EXTERN int
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pam_sm_close_session(pam_handle_t *pamh, int flags,
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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_EXTERN int
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pam_sm_chauthtok(pam_handle_t *pamh, int flags,
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int argc, const char *argv[])
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{
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return (PAM_SERVICE_ERR);
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}
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#ifdef PAM_MODULE_ENTRY
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PAM_MODULE_ENTRY("pam_unix");
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#endif
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