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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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#include <sys/utsname.h>
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#include <string.h>
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#include <errno.h>
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#include "mem.h"
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#include "conf.h"
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#include "xpath.h"
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#include "log.h"
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static void pusb_conf_options_get_from(t_pusb_options *opts,
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const char *from,
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xmlDoc *doc)
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{
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pusb_xpath_get_string_from(doc, from, "option[@name='hostname']",
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opts->hostname, sizeof(opts->hostname));
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pusb_xpath_get_string_from(doc, from, "option[@name='system_pad_directory']",
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opts->system_pad_directory,
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sizeof(opts->system_pad_directory));
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pusb_xpath_get_string_from(doc, from, "option[@name='device_pad_directory']",
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opts->device_pad_directory,
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sizeof(opts->device_pad_directory));
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pusb_xpath_get_bool_from(doc, from, "option[@name='debug']",
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&(opts->debug));
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pusb_xpath_get_bool_from(doc, from, "option[@name='quiet']",
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&(opts->quiet));
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pusb_xpath_get_bool_from(doc, from, "option[@name='color_log']",
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&(opts->color_log));
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pusb_xpath_get_bool_from(doc, from, "option[@name='enable']",
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&(opts->enable));
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pusb_xpath_get_bool_from(doc, from, "option[@name='one_time_pad']",
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&(opts->one_time_pad));
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pusb_xpath_get_time_from(doc, from, "option[@name='pad_expiration']",
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&(opts->pad_expiration));
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pusb_xpath_get_time_from(doc, from, "option[@name='probe_timeout']",
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&(opts->probe_timeout));
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pusb_xpath_get_bool_from(doc, from, "option[@name='deny_remote']",
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&(opts->deny_remote));
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}
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static int pusb_conf_parse_options(t_pusb_options *opts,
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xmlDoc *doc,
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const char *user,
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const char *service)
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{
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char *xpath = NULL;
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size_t xpath_size;
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int i;
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struct s_opt_list opt_list[] = {
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{ CONF_DEVICE_XPATH, opts->device.name },
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{ CONF_USER_XPATH, (char *)user },
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{ CONF_SERVICE_XPATH, (char *)service },
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{ NULL, NULL }
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};
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pusb_conf_options_get_from(opts, "//configuration/defaults/", doc);
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for (i = 0; opt_list[i].name != NULL; ++i)
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{
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xpath_size = strlen(opt_list[i].name) + strlen(opt_list[i].value) + 1;
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xpath = xmalloc(xpath_size);
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memset(xpath, 0x00, xpath_size);
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snprintf(xpath, xpath_size, opt_list[i].name, opt_list[i].value, "");
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pusb_conf_options_get_from(opts, xpath, doc);
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xfree(xpath);
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}
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return (1);
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}
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static int pusb_conf_device_get_property(t_pusb_options *opts,
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xmlDoc *doc,
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const char *property,
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char *store,
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size_t size)
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{
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char *xpath = NULL;
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size_t xpath_len;
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int retval;
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xpath_len = strlen(CONF_DEVICE_XPATH) + strlen(opts->device.name) + \
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strlen(property) + 1;
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xpath = xmalloc(xpath_len);
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memset(xpath, 0x00, xpath_len);
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snprintf(xpath, xpath_len, CONF_DEVICE_XPATH, opts->device.name,
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property);
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retval = pusb_xpath_get_string(doc, xpath, store, size);
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xfree(xpath);
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return (retval);
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}
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static int pusb_conf_parse_device(t_pusb_options *opts, xmlDoc *doc)
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{
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pusb_conf_device_get_property(opts, doc, "vendor", opts->device.vendor,
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sizeof(opts->device.vendor));
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pusb_conf_device_get_property(opts, doc, "model", opts->device.model,
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sizeof(opts->device.model));
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if (!pusb_conf_device_get_property(opts, doc, "serial", opts->device.serial,
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sizeof(opts->device.serial)))
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return (0);
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pusb_conf_device_get_property(opts, doc, "volume_uuid",
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opts->device.volume_uuid,
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sizeof(opts->device.volume_uuid));
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return (1);
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}
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int pusb_conf_init(t_pusb_options *opts)
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{
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struct utsname u;
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memset(opts, 0x00, sizeof(*opts));
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if (uname(&u) == -1)
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{
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log_error("uname: %s\n", strerror(errno));
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return (0);
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}
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strncpy(opts->hostname, u.nodename, sizeof(opts->hostname) - 1);
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if (strlen(u.nodename) > sizeof(opts->hostname))
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log_info("Hostname \"%s\" is too long, truncating to \"%s\".\n",
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u.nodename, opts->hostname);
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strcpy(opts->system_pad_directory, ".pamusb");
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strcpy(opts->device_pad_directory, ".pamusb");
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opts->probe_timeout = 10;
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opts->enable = 1;
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opts->debug = 0;
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opts->quiet = 0;
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opts->color_log = 1;
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opts->one_time_pad = 1;
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opts->pad_expiration = 3600;
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opts->deny_remote = 1;
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return (1);
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}
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int pusb_conf_parse(const char *file, t_pusb_options *opts,
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const char *user, const char *service)
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{
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xmlDoc *doc = NULL;
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int retval;
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char device_xpath[sizeof(CONF_USER_XPATH) + CONF_USER_MAXLEN + \
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sizeof("device")];
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log_debug("Parsing settings...\n",
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user, service);
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if (strlen(user) > CONF_USER_MAXLEN)
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{
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log_error("Username \"%s\" is too long (max: %d).\n", user,
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CONF_USER_MAXLEN);
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return (0);
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}
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if (!(doc = xmlReadFile(file, NULL, 0)))
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{
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log_error("Unable to parse \"%s\".\n", file);
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return (0);
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}
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snprintf(device_xpath, sizeof(device_xpath), CONF_USER_XPATH, user,
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"device");
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retval = pusb_xpath_get_string(doc,
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device_xpath,
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opts->device.name,
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sizeof(opts->device.name));
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if (!retval || !pusb_conf_parse_device(opts, doc))
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{
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log_error("No device configured for user \"%s\".\n", user);
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xmlFreeDoc(doc);
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xmlCleanupParser();
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return (0);
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}
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if (!pusb_conf_parse_options(opts, doc, user, service))
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{
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xmlFreeDoc(doc);
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xmlCleanupParser();
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return (0);
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}
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xmlFreeDoc(doc);
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xmlCleanupParser();
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return (1);
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}
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