1642eb1a52
o The new options-processing API o The new DEBUG-logging API Add man(1) pages for ALL modules. MDOC-Police welcome to check this. Audit, clean up while I'm here.
116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
/*-
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* Copyright 2001 Mark R V Murray
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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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#define PAM_SM_AUTH
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <pwd.h>
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#include <security/_pam_macros.h>
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#include <security/pam_modules.h>
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#include "pam_mod_misc.h"
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#define NOLOGIN "/var/run/nologin"
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PAM_EXTERN int
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pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc, const char **argv)
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{
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struct options options;
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struct pam_conv *conv;
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struct pam_message message, *pmessage;
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struct pam_response *resp;
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struct passwd *user_pwd;
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struct stat st;
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int retval, fd;
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const char *user;
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char *mtmp;
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pam_std_option(&options, NULL, argc, argv);
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PAM_LOG("Options processed");
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retval = pam_get_user(pamh, &user, NULL);
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if (retval != PAM_SUCCESS)
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PAM_RETURN(retval);
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PAM_LOG("Got user: %s", user);
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fd = open(NOLOGIN, O_RDONLY, 0);
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if (fd < 0)
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PAM_RETURN(PAM_SUCCESS);
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PAM_LOG("Opened %s file", NOLOGIN);
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user_pwd = getpwnam(user);
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if (user_pwd && user_pwd->pw_uid == 0) {
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message.msg_style = PAM_TEXT_INFO;
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retval = PAM_SUCCESS;
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}
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else {
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message.msg_style = PAM_ERROR_MSG;
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if (!user_pwd)
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retval = PAM_USER_UNKNOWN;
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else
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retval = PAM_AUTH_ERR;
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}
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if (fstat(fd, &st) < 0)
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PAM_RETURN(retval);
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message.msg = mtmp = malloc(st.st_size + 1);
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if (!message.msg)
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PAM_RETURN(retval);
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read(fd, mtmp, st.st_size);
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mtmp[st.st_size] = '\0';
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pmessage = &message;
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resp = NULL;
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pam_get_item(pamh, PAM_CONV, (const void **)&conv);
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conv->conv(1, (const struct pam_message **)&pmessage, &resp,
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conv->appdata_ptr);
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free(mtmp);
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if (resp)
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_pam_drop_reply(resp, 1);
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PAM_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_nologin");
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