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/*
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* Copyright (c) 2003-2007 Andrea Luzzardi <scox@sig11.org>
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*
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* This file is part of the pam_usb project. pam_usb is free software;
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* you can redistribute it and/or modify it under the terms of the GNU General
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* Public License version 2, as published by the Free Software Foundation.
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*
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* pam_usb is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
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* Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#define PAM_SM_AUTH
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#include <security/pam_modules.h>
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#include <security/_pam_macros.h>
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#include "version.h"
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#include "conf.h"
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#include "log.h"
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#include "local.h"
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#include "device.h"
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PAM_EXTERN
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int 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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t_pusb_options opts;
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const char *service;
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const char *user;
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const char *tty;
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char *conf_file = PUSB_CONF_FILE;
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int retval;
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pusb_log_init(&opts);
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retval = pam_get_item(pamh, PAM_SERVICE,
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(const void **)(const void *)&service);
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if (retval != PAM_SUCCESS)
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{
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log_error("Unable to retrieve the PAM service name.\n");
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return (PAM_AUTH_ERR);
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}
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if (pam_get_user(pamh, &user, NULL) != PAM_SUCCESS || !user || !*user)
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{
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log_error("Unable to retrieve the PAM user name.\n");
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return (PAM_AUTH_ERR);
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}
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if (argc > 1)
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if (!strcmp(argv[0], "-c"))
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conf_file = (char *)argv[1];
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if (!pusb_conf_init(&opts))
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return (PAM_AUTH_ERR);
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if (!pusb_conf_parse(conf_file, &opts, user, service))
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return (PAM_AUTH_ERR);
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if (!opts.enable)
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{
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log_debug("Not enabled, exiting...\n");
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return (PAM_IGNORE);
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}
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log_info("pam_usb v%s\n", PUSB_VERSION);
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log_info("Authentication request for user \"%s\" (%s)\n",
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user, service);
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if (pam_get_item(pamh, PAM_TTY,
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(const void **)(const void *)&tty) == PAM_SUCCESS)
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{
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if (tty && !strcmp(tty, "ssh"))
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{
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log_debug("SSH Authentication, aborting.\n");
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return (PAM_AUTH_ERR);
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}
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}
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if (!pusb_local_login(&opts, user))
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{
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log_error("Access denied.\n");
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return (PAM_AUTH_ERR);
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}
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if (pusb_device_check(&opts, user))
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{
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log_info("Access granted.\n");
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return (PAM_SUCCESS);
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}
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log_error("Access denied.\n");
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return (PAM_AUTH_ERR);
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}
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PAM_EXTERN
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int pam_sm_setcred(pam_handle_t *pamh,int flags,int argc,
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const char **argv)
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{
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return (PAM_SUCCESS);
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}
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#ifdef PAM_STATIC
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struct pam_module _pam_usb_modstruct = {
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"pam_usb",
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pam_sm_authenticate,
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pam_sm_setcred,
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NULL,
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NULL,
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NULL,
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NULL
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};
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#endif
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