mirror of
https://git.kernel.org/pub/scm/network/wireless/iwd.git
synced 2024-11-07 12:39:23 +01:00
146 lines
3.2 KiB
C
146 lines
3.2 KiB
C
/*
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*
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* Wireless daemon for Linux
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*
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* Copyright (C) 2016 Intel Corporation. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <errno.h>
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#include <ell/ell.h>
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#include "eap.h"
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struct eap_md5_state {
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char *secret;
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};
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static int eap_md5_probe(struct eap_state *eap, const char *name)
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{
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struct eap_md5_state *md5;
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if (strcasecmp(name, "MD5"))
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return -ENOTSUP;
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md5 = l_new(struct eap_md5_state, 1);
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eap_set_data(eap, md5);
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return 0;
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}
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static void eap_md5_remove(struct eap_state *eap)
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{
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struct eap_md5_state *md5 = eap_get_data(eap);
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eap_set_data(eap, NULL);
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l_free(md5->secret);
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l_free(md5);
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}
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static void eap_md5_handle_request(struct eap_state *eap,
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const uint8_t *pkt, size_t len)
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{
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struct eap_md5_state *md5 = eap_get_data(eap);
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const uint8_t *value;
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struct l_checksum *hash;
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uint8_t identifier, response[5 + 1 + 16];
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if (len < 1 || len < (size_t) pkt[0] + 1 || pkt[0] < 1) {
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l_error("EAP-MD5 request too short");
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goto err;
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}
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value = pkt + 1;
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hash = l_checksum_new(L_CHECKSUM_MD5);
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if (!hash) {
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l_error("Can't create the MD5 checksum");
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goto err;
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}
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eap_save_last_id(eap, &identifier);
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l_checksum_update(hash, &identifier, 1);
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l_checksum_update(hash, md5->secret, strlen(md5->secret));
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l_checksum_update(hash, value, pkt[0]);
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response[5] = 16;
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l_checksum_get_digest(hash, response + 6, 16);
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l_checksum_free(hash);
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eap_send_response(eap, EAP_TYPE_MD5_CHALLENGE,
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response, sizeof(response));
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/* We have no choice but to call it a success */
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eap_method_success(eap);
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return;
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err:
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eap_method_error(eap);
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}
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static bool eap_md5_load_settings(struct eap_state *eap,
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struct l_settings *settings,
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const char *prefix)
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{
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struct eap_md5_state *md5 = eap_get_data(eap);
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char setting[64];
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snprintf(setting, sizeof(setting), "%sMD5-Secret", prefix);
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md5->secret = l_strdup(l_settings_get_value(settings,
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"Security", setting));
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if (!md5->secret) {
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l_error("EAP-MD5 secret is missing");
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return false;
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}
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return true;
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}
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static struct eap_method eap_md5 = {
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.request_type = EAP_TYPE_MD5_CHALLENGE,
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.exports_msk = false,
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.name = "MD5",
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.probe = eap_md5_probe,
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.remove = eap_md5_remove,
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.handle_request = eap_md5_handle_request,
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.load_settings = eap_md5_load_settings,
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};
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static int eap_md5_init(void)
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{
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l_debug("");
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return eap_register_method(&eap_md5);
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}
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static void eap_md5_exit(void)
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{
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l_debug("");
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eap_unregister_method(&eap_md5);
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}
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EAP_METHOD_BUILTIN(eap_md5, eap_md5_init, eap_md5_exit)
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