896 lines
25 KiB
C
896 lines
25 KiB
C
/*
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* EAP peer method: EAP-PEAP (draft-josefsson-pppext-eap-tls-eap-07.txt)
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* Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "eap_i.h"
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#include "eap_tls_common.h"
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#include "config_ssid.h"
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#include "tls.h"
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#include "eap_tlv.h"
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/* Maximum supported PEAP version
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* 0 = Microsoft's PEAP version 0; draft-kamath-pppext-peapv0-00.txt
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* 1 = draft-josefsson-ppext-eap-tls-eap-05.txt
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* 2 = draft-josefsson-ppext-eap-tls-eap-07.txt
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*/
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#define EAP_PEAP_VERSION 1
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static void eap_peap_deinit(struct eap_sm *sm, void *priv);
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struct eap_peap_data {
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struct eap_ssl_data ssl;
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int peap_version, force_peap_version, force_new_label;
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const struct eap_method *phase2_method;
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void *phase2_priv;
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int phase2_success;
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int phase2_eap_success;
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int phase2_eap_started;
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struct eap_method_type phase2_type;
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struct eap_method_type *phase2_types;
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size_t num_phase2_types;
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int peap_outer_success; /* 0 = PEAP terminated on Phase 2 inner
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* EAP-Success
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* 1 = reply with tunneled EAP-Success to inner
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* EAP-Success and expect AS to send outer
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* (unencrypted) EAP-Success after this
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* 2 = reply with PEAP/TLS ACK to inner
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* EAP-Success and expect AS to send outer
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* (unencrypted) EAP-Success after this */
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int resuming; /* starting a resumed session */
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u8 *key_data;
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u8 *pending_phase2_req;
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size_t pending_phase2_req_len;
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};
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static void * eap_peap_init(struct eap_sm *sm)
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{
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struct eap_peap_data *data;
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struct wpa_ssid *config = eap_get_config(sm);
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data = os_zalloc(sizeof(*data));
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if (data == NULL)
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return NULL;
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sm->peap_done = FALSE;
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data->peap_version = EAP_PEAP_VERSION;
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data->force_peap_version = -1;
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data->peap_outer_success = 2;
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if (config && config->phase1) {
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char *pos = os_strstr(config->phase1, "peapver=");
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if (pos) {
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data->force_peap_version = atoi(pos + 8);
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data->peap_version = data->force_peap_version;
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Forced PEAP version "
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"%d", data->force_peap_version);
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}
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if (os_strstr(config->phase1, "peaplabel=1")) {
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data->force_new_label = 1;
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Force new label for "
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"key derivation");
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}
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if (os_strstr(config->phase1, "peap_outer_success=0")) {
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data->peap_outer_success = 0;
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wpa_printf(MSG_DEBUG, "EAP-PEAP: terminate "
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"authentication on tunneled EAP-Success");
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} else if (os_strstr(config->phase1, "peap_outer_success=1")) {
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data->peap_outer_success = 1;
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wpa_printf(MSG_DEBUG, "EAP-PEAP: send tunneled "
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"EAP-Success after receiving tunneled "
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"EAP-Success");
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} else if (os_strstr(config->phase1, "peap_outer_success=2")) {
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data->peap_outer_success = 2;
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wpa_printf(MSG_DEBUG, "EAP-PEAP: send PEAP/TLS ACK "
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"after receiving tunneled EAP-Success");
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}
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}
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if (config && config->phase2) {
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char *start, *pos, *buf;
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struct eap_method_type *methods = NULL, *_methods;
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u8 method;
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size_t num_methods = 0;
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start = buf = os_strdup(config->phase2);
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if (buf == NULL) {
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eap_peap_deinit(sm, data);
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return NULL;
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}
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while (start && *start != '\0') {
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int vendor;
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pos = os_strstr(start, "auth=");
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if (pos == NULL)
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break;
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if (start != pos && *(pos - 1) != ' ') {
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start = pos + 5;
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continue;
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}
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start = pos + 5;
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pos = os_strchr(start, ' ');
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if (pos)
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*pos++ = '\0';
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method = eap_get_phase2_type(start, &vendor);
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if (vendor == EAP_VENDOR_IETF &&
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method == EAP_TYPE_NONE) {
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wpa_printf(MSG_ERROR, "EAP-PEAP: Unsupported "
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"Phase2 method '%s'", start);
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} else {
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num_methods++;
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_methods = os_realloc(
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methods,
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num_methods * sizeof(*methods));
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if (_methods == NULL) {
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os_free(methods);
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os_free(buf);
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eap_peap_deinit(sm, data);
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return NULL;
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}
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methods = _methods;
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methods[num_methods - 1].vendor = vendor;
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methods[num_methods - 1].method = method;
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}
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start = pos;
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}
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os_free(buf);
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data->phase2_types = methods;
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data->num_phase2_types = num_methods;
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}
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if (data->phase2_types == NULL) {
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data->phase2_types =
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eap_get_phase2_types(config, &data->num_phase2_types);
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}
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if (data->phase2_types == NULL) {
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wpa_printf(MSG_ERROR, "EAP-PEAP: No Phase2 method available");
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eap_peap_deinit(sm, data);
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return NULL;
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}
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wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Phase2 EAP types",
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(u8 *) data->phase2_types,
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data->num_phase2_types * sizeof(struct eap_method_type));
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data->phase2_type.vendor = EAP_VENDOR_IETF;
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data->phase2_type.method = EAP_TYPE_NONE;
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if (eap_tls_ssl_init(sm, &data->ssl, config)) {
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wpa_printf(MSG_INFO, "EAP-PEAP: Failed to initialize SSL.");
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eap_peap_deinit(sm, data);
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return NULL;
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}
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return data;
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}
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static void eap_peap_deinit(struct eap_sm *sm, void *priv)
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{
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struct eap_peap_data *data = priv;
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if (data == NULL)
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return;
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if (data->phase2_priv && data->phase2_method)
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data->phase2_method->deinit(sm, data->phase2_priv);
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os_free(data->phase2_types);
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eap_tls_ssl_deinit(sm, &data->ssl);
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os_free(data->key_data);
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os_free(data->pending_phase2_req);
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os_free(data);
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}
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static int eap_peap_encrypt(struct eap_sm *sm, struct eap_peap_data *data,
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int id, const u8 *plain, size_t plain_len,
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u8 **out_data, size_t *out_len)
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{
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int res;
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u8 *pos;
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struct eap_hdr *resp;
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/* TODO: add support for fragmentation, if needed. This will need to
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* add TLS Message Length field, if the frame is fragmented.
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* Note: Microsoft IAS did not seem to like TLS Message Length with
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* PEAP/MSCHAPv2. */
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resp = os_malloc(sizeof(struct eap_hdr) + 2 + data->ssl.tls_out_limit);
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if (resp == NULL)
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return -1;
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resp->code = EAP_CODE_RESPONSE;
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resp->identifier = id;
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pos = (u8 *) (resp + 1);
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*pos++ = EAP_TYPE_PEAP;
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*pos++ = data->peap_version;
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res = tls_connection_encrypt(sm->ssl_ctx, data->ssl.conn,
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plain, plain_len,
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pos, data->ssl.tls_out_limit);
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if (res < 0) {
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wpa_printf(MSG_INFO, "EAP-PEAP: Failed to encrypt Phase 2 "
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"data");
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os_free(resp);
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return -1;
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}
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*out_len = sizeof(struct eap_hdr) + 2 + res;
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resp->length = host_to_be16(*out_len);
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*out_data = (u8 *) resp;
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return 0;
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}
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static int eap_peap_phase2_nak(struct eap_peap_data *data, struct eap_hdr *hdr,
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u8 **resp, size_t *resp_len)
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{
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struct eap_hdr *resp_hdr;
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u8 *pos = (u8 *) (hdr + 1);
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size_t i;
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/* TODO: add support for expanded Nak */
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Request: Nak type=%d", *pos);
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wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Allowed Phase2 EAP types",
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(u8 *) data->phase2_types,
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data->num_phase2_types * sizeof(struct eap_method_type));
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*resp_len = sizeof(struct eap_hdr) + 1;
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*resp = os_malloc(*resp_len + data->num_phase2_types);
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if (*resp == NULL)
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return -1;
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resp_hdr = (struct eap_hdr *) (*resp);
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resp_hdr->code = EAP_CODE_RESPONSE;
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resp_hdr->identifier = hdr->identifier;
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pos = (u8 *) (resp_hdr + 1);
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*pos++ = EAP_TYPE_NAK;
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for (i = 0; i < data->num_phase2_types; i++) {
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if (data->phase2_types[i].vendor == EAP_VENDOR_IETF &&
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data->phase2_types[i].method < 256) {
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(*resp_len)++;
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*pos++ = data->phase2_types[i].method;
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}
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}
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resp_hdr->length = host_to_be16(*resp_len);
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return 0;
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}
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static int eap_peap_phase2_request(struct eap_sm *sm,
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struct eap_peap_data *data,
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struct eap_method_ret *ret,
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struct eap_hdr *hdr,
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u8 **resp, size_t *resp_len)
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{
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size_t len = be_to_host16(hdr->length);
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u8 *pos;
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struct eap_method_ret iret;
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struct wpa_ssid *config = eap_get_config(sm);
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if (len <= sizeof(struct eap_hdr)) {
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wpa_printf(MSG_INFO, "EAP-PEAP: too short "
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"Phase 2 request (len=%lu)", (unsigned long) len);
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return -1;
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}
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pos = (u8 *) (hdr + 1);
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Request: type=%d", *pos);
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switch (*pos) {
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case EAP_TYPE_IDENTITY:
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*resp = eap_sm_buildIdentity(sm, hdr->identifier, resp_len, 1);
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break;
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case EAP_TYPE_TLV:
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os_memset(&iret, 0, sizeof(iret));
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if (eap_tlv_process(sm, &iret, hdr, resp, resp_len,
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data->phase2_eap_started &&
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!data->phase2_eap_success)) {
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ret->methodState = METHOD_DONE;
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ret->decision = DECISION_FAIL;
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return -1;
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}
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if (iret.methodState == METHOD_DONE ||
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iret.methodState == METHOD_MAY_CONT) {
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ret->methodState = iret.methodState;
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ret->decision = iret.decision;
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data->phase2_success = 1;
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}
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break;
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default:
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if (data->phase2_type.vendor == EAP_VENDOR_IETF &&
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data->phase2_type.method == EAP_TYPE_NONE) {
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size_t i;
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for (i = 0; i < data->num_phase2_types; i++) {
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if (data->phase2_types[i].vendor !=
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EAP_VENDOR_IETF ||
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data->phase2_types[i].method != *pos)
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continue;
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data->phase2_type.vendor =
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data->phase2_types[i].vendor;
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data->phase2_type.method =
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data->phase2_types[i].method;
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Selected "
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"Phase 2 EAP vendor %d method %d",
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data->phase2_type.vendor,
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data->phase2_type.method);
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break;
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}
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}
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if (*pos != data->phase2_type.method ||
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*pos == EAP_TYPE_NONE) {
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if (eap_peap_phase2_nak(data, hdr, resp, resp_len))
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return -1;
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return 0;
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}
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if (data->phase2_priv == NULL) {
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data->phase2_method = eap_sm_get_eap_methods(
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data->phase2_type.vendor,
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data->phase2_type.method);
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if (data->phase2_method) {
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sm->init_phase2 = 1;
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data->phase2_priv =
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data->phase2_method->init(sm);
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sm->init_phase2 = 0;
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}
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}
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if (data->phase2_priv == NULL || data->phase2_method == NULL) {
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wpa_printf(MSG_INFO, "EAP-PEAP: failed to initialize "
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"Phase 2 EAP method %d", *pos);
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ret->methodState = METHOD_DONE;
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ret->decision = DECISION_FAIL;
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return -1;
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}
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data->phase2_eap_started = 1;
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os_memset(&iret, 0, sizeof(iret));
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*resp = data->phase2_method->process(sm, data->phase2_priv,
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&iret, (u8 *) hdr, len,
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resp_len);
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if ((iret.methodState == METHOD_DONE ||
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iret.methodState == METHOD_MAY_CONT) &&
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(iret.decision == DECISION_UNCOND_SUCC ||
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iret.decision == DECISION_COND_SUCC)) {
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data->phase2_eap_success = 1;
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data->phase2_success = 1;
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}
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break;
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}
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if (*resp == NULL &&
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(config->pending_req_identity || config->pending_req_password ||
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config->pending_req_otp || config->pending_req_new_password)) {
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os_free(data->pending_phase2_req);
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data->pending_phase2_req = os_malloc(len);
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if (data->pending_phase2_req) {
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os_memcpy(data->pending_phase2_req, hdr, len);
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data->pending_phase2_req_len = len;
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}
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}
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return 0;
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}
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static int eap_peap_decrypt(struct eap_sm *sm, struct eap_peap_data *data,
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struct eap_method_ret *ret,
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const struct eap_hdr *req,
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const u8 *in_data, size_t in_len,
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u8 **out_data, size_t *out_len)
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{
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u8 *in_decrypted;
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int res, skip_change = 0;
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struct eap_hdr *hdr, *rhdr;
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u8 *resp = NULL;
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size_t resp_len, len_decrypted, len, buf_len;
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const u8 *msg;
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size_t msg_len;
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int need_more_input;
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wpa_printf(MSG_DEBUG, "EAP-PEAP: received %lu bytes encrypted data for"
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" Phase 2", (unsigned long) in_len);
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if (data->pending_phase2_req) {
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Pending Phase 2 request - "
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"skip decryption and use old data");
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/* Clear TLS reassembly state. */
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os_free(data->ssl.tls_in);
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data->ssl.tls_in = NULL;
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data->ssl.tls_in_len = 0;
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data->ssl.tls_in_left = 0;
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data->ssl.tls_in_total = 0;
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in_decrypted = data->pending_phase2_req;
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data->pending_phase2_req = NULL;
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len_decrypted = data->pending_phase2_req_len;
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skip_change = 1;
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goto continue_req;
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}
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msg = eap_tls_data_reassemble(sm, &data->ssl, in_data, in_len,
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&msg_len, &need_more_input);
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if (msg == NULL)
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return need_more_input ? 1 : -1;
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if (in_len == 0 && sm->workaround && data->phase2_success) {
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/*
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* Cisco ACS seems to be using TLS ACK to terminate
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* EAP-PEAPv0/GTC. Try to reply with TLS ACK.
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*/
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Received TLS ACK, but "
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"expected data - acknowledge with TLS ACK since "
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"Phase 2 has been completed");
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ret->decision = DECISION_COND_SUCC;
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ret->methodState = METHOD_DONE;
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return 1;
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}
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buf_len = in_len;
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if (data->ssl.tls_in_total > buf_len)
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buf_len = data->ssl.tls_in_total;
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in_decrypted = os_malloc(buf_len);
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if (in_decrypted == NULL) {
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os_free(data->ssl.tls_in);
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data->ssl.tls_in = NULL;
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data->ssl.tls_in_len = 0;
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wpa_printf(MSG_WARNING, "EAP-PEAP: failed to allocate memory "
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"for decryption");
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return -1;
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}
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res = tls_connection_decrypt(sm->ssl_ctx, data->ssl.conn,
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msg, msg_len, in_decrypted, buf_len);
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os_free(data->ssl.tls_in);
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data->ssl.tls_in = NULL;
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data->ssl.tls_in_len = 0;
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if (res < 0) {
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wpa_printf(MSG_INFO, "EAP-PEAP: Failed to decrypt Phase 2 "
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"data");
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os_free(in_decrypted);
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return 0;
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}
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len_decrypted = res;
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continue_req:
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wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Decrypted Phase 2 EAP", in_decrypted,
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len_decrypted);
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hdr = (struct eap_hdr *) in_decrypted;
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if (len_decrypted == 5 && hdr->code == EAP_CODE_REQUEST &&
|
|
be_to_host16(hdr->length) == 5 &&
|
|
in_decrypted[4] == EAP_TYPE_IDENTITY) {
|
|
/* At least FreeRADIUS seems to send full EAP header with
|
|
* EAP Request Identity */
|
|
skip_change = 1;
|
|
}
|
|
if (len_decrypted >= 5 && hdr->code == EAP_CODE_REQUEST &&
|
|
in_decrypted[4] == EAP_TYPE_TLV) {
|
|
skip_change = 1;
|
|
}
|
|
|
|
if (data->peap_version == 0 && !skip_change) {
|
|
struct eap_hdr *nhdr = os_malloc(sizeof(struct eap_hdr) +
|
|
len_decrypted);
|
|
if (nhdr == NULL) {
|
|
os_free(in_decrypted);
|
|
return 0;
|
|
}
|
|
os_memcpy((u8 *) (nhdr + 1), in_decrypted, len_decrypted);
|
|
os_free(in_decrypted);
|
|
nhdr->code = req->code;
|
|
nhdr->identifier = req->identifier;
|
|
nhdr->length = host_to_be16(sizeof(struct eap_hdr) +
|
|
len_decrypted);
|
|
|
|
len_decrypted += sizeof(struct eap_hdr);
|
|
in_decrypted = (u8 *) nhdr;
|
|
}
|
|
hdr = (struct eap_hdr *) in_decrypted;
|
|
if (len_decrypted < sizeof(*hdr)) {
|
|
os_free(in_decrypted);
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Too short Phase 2 "
|
|
"EAP frame (len=%lu)",
|
|
(unsigned long) len_decrypted);
|
|
return 0;
|
|
}
|
|
len = be_to_host16(hdr->length);
|
|
if (len > len_decrypted) {
|
|
os_free(in_decrypted);
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Length mismatch in "
|
|
"Phase 2 EAP frame (len=%lu hdr->length=%lu)",
|
|
(unsigned long) len_decrypted, (unsigned long) len);
|
|
return 0;
|
|
}
|
|
if (len < len_decrypted) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Odd.. Phase 2 EAP header has "
|
|
"shorter length than full decrypted data "
|
|
"(%lu < %lu)",
|
|
(unsigned long) len, (unsigned long) len_decrypted);
|
|
if (sm->workaround && len == 4 && len_decrypted == 5 &&
|
|
in_decrypted[4] == EAP_TYPE_IDENTITY) {
|
|
/* Radiator 3.9 seems to set Phase 2 EAP header to use
|
|
* incorrect length for the EAP-Request Identity
|
|
* packet, so fix the inner header to interoperate..
|
|
* This was fixed in 2004-06-23 patch for Radiator and
|
|
* this workaround can be removed at some point. */
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: workaround -> replace "
|
|
"Phase 2 EAP header len (%lu) with real "
|
|
"decrypted len (%lu)",
|
|
(unsigned long) len,
|
|
(unsigned long) len_decrypted);
|
|
len = len_decrypted;
|
|
hdr->length = host_to_be16(len);
|
|
}
|
|
}
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: received Phase 2: code=%d "
|
|
"identifier=%d length=%lu", hdr->code, hdr->identifier,
|
|
(unsigned long) len);
|
|
switch (hdr->code) {
|
|
case EAP_CODE_REQUEST:
|
|
if (eap_peap_phase2_request(sm, data, ret, hdr,
|
|
&resp, &resp_len)) {
|
|
os_free(in_decrypted);
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Phase2 Request "
|
|
"processing failed");
|
|
return 0;
|
|
}
|
|
break;
|
|
case EAP_CODE_SUCCESS:
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Success");
|
|
if (data->peap_version == 1) {
|
|
/* EAP-Success within TLS tunnel is used to indicate
|
|
* shutdown of the TLS channel. The authentication has
|
|
* been completed. */
|
|
if (data->phase2_eap_started &&
|
|
!data->phase2_eap_success) {
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 "
|
|
"Success used to indicate success, "
|
|
"but Phase 2 EAP was not yet "
|
|
"completed successfully");
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_FAIL;
|
|
os_free(in_decrypted);
|
|
return 0;
|
|
}
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Version 1 - "
|
|
"EAP-Success within TLS tunnel - "
|
|
"authentication completed");
|
|
ret->decision = DECISION_UNCOND_SUCC;
|
|
ret->methodState = METHOD_DONE;
|
|
data->phase2_success = 1;
|
|
if (data->peap_outer_success == 2) {
|
|
os_free(in_decrypted);
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Use TLS ACK "
|
|
"to finish authentication");
|
|
return 1;
|
|
} else if (data->peap_outer_success == 1) {
|
|
/* Reply with EAP-Success within the TLS
|
|
* channel to complete the authentication. */
|
|
resp_len = sizeof(struct eap_hdr);
|
|
resp = os_zalloc(resp_len);
|
|
if (resp) {
|
|
rhdr = (struct eap_hdr *) resp;
|
|
rhdr->code = EAP_CODE_SUCCESS;
|
|
rhdr->identifier = hdr->identifier;
|
|
rhdr->length = host_to_be16(resp_len);
|
|
}
|
|
} else {
|
|
/* No EAP-Success expected for Phase 1 (outer,
|
|
* unencrypted auth), so force EAP state
|
|
* machine to SUCCESS state. */
|
|
sm->peap_done = TRUE;
|
|
}
|
|
} else {
|
|
/* FIX: ? */
|
|
}
|
|
break;
|
|
case EAP_CODE_FAILURE:
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Failure");
|
|
ret->decision = DECISION_FAIL;
|
|
ret->methodState = METHOD_MAY_CONT;
|
|
ret->allowNotifications = FALSE;
|
|
/* Reply with EAP-Failure within the TLS channel to complete
|
|
* failure reporting. */
|
|
resp_len = sizeof(struct eap_hdr);
|
|
resp = os_zalloc(resp_len);
|
|
if (resp) {
|
|
rhdr = (struct eap_hdr *) resp;
|
|
rhdr->code = EAP_CODE_FAILURE;
|
|
rhdr->identifier = hdr->identifier;
|
|
rhdr->length = host_to_be16(resp_len);
|
|
}
|
|
break;
|
|
default:
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Unexpected code=%d in "
|
|
"Phase 2 EAP header", hdr->code);
|
|
break;
|
|
}
|
|
|
|
os_free(in_decrypted);
|
|
|
|
if (resp) {
|
|
u8 *resp_pos;
|
|
size_t resp_send_len;
|
|
int skip_change2 = 0;
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: Encrypting Phase 2 data",
|
|
resp, resp_len);
|
|
/* PEAP version changes */
|
|
if (resp_len >= 5 && resp[0] == EAP_CODE_RESPONSE &&
|
|
resp[4] == EAP_TYPE_TLV)
|
|
skip_change2 = 1;
|
|
if (data->peap_version == 0 && !skip_change2) {
|
|
resp_pos = resp + sizeof(struct eap_hdr);
|
|
resp_send_len = resp_len - sizeof(struct eap_hdr);
|
|
} else {
|
|
resp_pos = resp;
|
|
resp_send_len = resp_len;
|
|
}
|
|
|
|
if (eap_peap_encrypt(sm, data, req->identifier,
|
|
resp_pos, resp_send_len,
|
|
out_data, out_len)) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Failed to encrypt "
|
|
"a Phase 2 frame");
|
|
}
|
|
os_free(resp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static u8 * eap_peap_process(struct eap_sm *sm, void *priv,
|
|
struct eap_method_ret *ret,
|
|
const u8 *reqData, size_t reqDataLen,
|
|
size_t *respDataLen)
|
|
{
|
|
const struct eap_hdr *req;
|
|
size_t left;
|
|
int res;
|
|
u8 flags, *resp, id;
|
|
const u8 *pos;
|
|
struct eap_peap_data *data = priv;
|
|
|
|
pos = eap_tls_process_init(sm, &data->ssl, EAP_TYPE_PEAP, ret,
|
|
reqData, reqDataLen, &left, &flags);
|
|
if (pos == NULL)
|
|
return NULL;
|
|
req = (const struct eap_hdr *) reqData;
|
|
id = req->identifier;
|
|
|
|
if (flags & EAP_TLS_FLAGS_START) {
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Start (server ver=%d, own "
|
|
"ver=%d)", flags & EAP_PEAP_VERSION_MASK,
|
|
data->peap_version);
|
|
if ((flags & EAP_PEAP_VERSION_MASK) < data->peap_version)
|
|
data->peap_version = flags & EAP_PEAP_VERSION_MASK;
|
|
if (data->force_peap_version >= 0 &&
|
|
data->force_peap_version != data->peap_version) {
|
|
wpa_printf(MSG_WARNING, "EAP-PEAP: Failed to select "
|
|
"forced PEAP version %d",
|
|
data->force_peap_version);
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_FAIL;
|
|
ret->allowNotifications = FALSE;
|
|
return NULL;
|
|
}
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Using PEAP version %d",
|
|
data->peap_version);
|
|
left = 0; /* make sure that this frame is empty, even though it
|
|
* should always be, anyway */
|
|
}
|
|
|
|
resp = NULL;
|
|
if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
|
|
!data->resuming) {
|
|
res = eap_peap_decrypt(sm, data, ret, req, pos, left,
|
|
&resp, respDataLen);
|
|
} else {
|
|
res = eap_tls_process_helper(sm, &data->ssl, EAP_TYPE_PEAP,
|
|
data->peap_version, id, pos, left,
|
|
&resp, respDataLen);
|
|
|
|
if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
|
|
char *label;
|
|
wpa_printf(MSG_DEBUG,
|
|
"EAP-PEAP: TLS done, proceed to Phase 2");
|
|
os_free(data->key_data);
|
|
/* draft-josefsson-ppext-eap-tls-eap-05.txt
|
|
* specifies that PEAPv1 would use "client PEAP
|
|
* encryption" as the label. However, most existing
|
|
* PEAPv1 implementations seem to be using the old
|
|
* label, "client EAP encryption", instead. Use the old
|
|
* label by default, but allow it to be configured with
|
|
* phase1 parameter peaplabel=1. */
|
|
if (data->peap_version > 1 || data->force_new_label)
|
|
label = "client PEAP encryption";
|
|
else
|
|
label = "client EAP encryption";
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: using label '%s' in "
|
|
"key derivation", label);
|
|
data->key_data =
|
|
eap_tls_derive_key(sm, &data->ssl, label,
|
|
EAP_TLS_KEY_LEN);
|
|
if (data->key_data) {
|
|
wpa_hexdump_key(MSG_DEBUG,
|
|
"EAP-PEAP: Derived key",
|
|
data->key_data,
|
|
EAP_TLS_KEY_LEN);
|
|
} else {
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Failed to "
|
|
"derive key");
|
|
}
|
|
|
|
if (sm->workaround && data->resuming) {
|
|
/*
|
|
* At least few RADIUS servers (Aegis v1.1.6;
|
|
* but not v1.1.4; and Cisco ACS) seem to be
|
|
* terminating PEAPv1 (Aegis) or PEAPv0 (Cisco
|
|
* ACS) session resumption with outer
|
|
* EAP-Success. This does not seem to follow
|
|
* draft-josefsson-pppext-eap-tls-eap-05.txt
|
|
* section 4.2, so only allow this if EAP
|
|
* workarounds are enabled.
|
|
*/
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Workaround - "
|
|
"allow outer EAP-Success to "
|
|
"terminate PEAP resumption");
|
|
ret->decision = DECISION_COND_SUCC;
|
|
data->phase2_success = 1;
|
|
}
|
|
|
|
data->resuming = 0;
|
|
}
|
|
|
|
if (res == 2) {
|
|
/*
|
|
* Application data included in the handshake message.
|
|
*/
|
|
os_free(data->pending_phase2_req);
|
|
data->pending_phase2_req = resp;
|
|
data->pending_phase2_req_len = *respDataLen;
|
|
resp = NULL;
|
|
*respDataLen = 0;
|
|
res = eap_peap_decrypt(sm, data, ret, req, pos, left,
|
|
&resp, respDataLen);
|
|
}
|
|
}
|
|
|
|
if (ret->methodState == METHOD_DONE) {
|
|
ret->allowNotifications = FALSE;
|
|
}
|
|
|
|
if (res == 1) {
|
|
return eap_tls_build_ack(&data->ssl, respDataLen, id,
|
|
EAP_TYPE_PEAP, data->peap_version);
|
|
}
|
|
|
|
return resp;
|
|
}
|
|
|
|
|
|
static Boolean eap_peap_has_reauth_data(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_peap_data *data = priv;
|
|
return tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
|
|
data->phase2_success;
|
|
}
|
|
|
|
|
|
static void eap_peap_deinit_for_reauth(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_peap_data *data = priv;
|
|
os_free(data->pending_phase2_req);
|
|
data->pending_phase2_req = NULL;
|
|
}
|
|
|
|
|
|
static void * eap_peap_init_for_reauth(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_peap_data *data = priv;
|
|
os_free(data->key_data);
|
|
data->key_data = NULL;
|
|
if (eap_tls_reauth_init(sm, &data->ssl)) {
|
|
os_free(data);
|
|
return NULL;
|
|
}
|
|
if (data->phase2_priv && data->phase2_method &&
|
|
data->phase2_method->init_for_reauth)
|
|
data->phase2_method->init_for_reauth(sm, data->phase2_priv);
|
|
data->phase2_success = 0;
|
|
data->phase2_eap_success = 0;
|
|
data->phase2_eap_started = 0;
|
|
data->resuming = 1;
|
|
sm->peap_done = FALSE;
|
|
return priv;
|
|
}
|
|
|
|
|
|
static int eap_peap_get_status(struct eap_sm *sm, void *priv, char *buf,
|
|
size_t buflen, int verbose)
|
|
{
|
|
struct eap_peap_data *data = priv;
|
|
int len, ret;
|
|
|
|
len = eap_tls_status(sm, &data->ssl, buf, buflen, verbose);
|
|
if (data->phase2_method) {
|
|
ret = os_snprintf(buf + len, buflen - len,
|
|
"EAP-PEAPv%d Phase2 method=%s\n",
|
|
data->peap_version,
|
|
data->phase2_method->name);
|
|
if (ret < 0 || (size_t) ret >= buflen - len)
|
|
return len;
|
|
len += ret;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
|
|
static Boolean eap_peap_isKeyAvailable(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_peap_data *data = priv;
|
|
return data->key_data != NULL && data->phase2_success;
|
|
}
|
|
|
|
|
|
static u8 * eap_peap_getKey(struct eap_sm *sm, void *priv, size_t *len)
|
|
{
|
|
struct eap_peap_data *data = priv;
|
|
u8 *key;
|
|
|
|
if (data->key_data == NULL || !data->phase2_success)
|
|
return NULL;
|
|
|
|
key = os_malloc(EAP_TLS_KEY_LEN);
|
|
if (key == NULL)
|
|
return NULL;
|
|
|
|
*len = EAP_TLS_KEY_LEN;
|
|
os_memcpy(key, data->key_data, EAP_TLS_KEY_LEN);
|
|
|
|
return key;
|
|
}
|
|
|
|
|
|
int eap_peer_peap_register(void)
|
|
{
|
|
struct eap_method *eap;
|
|
int ret;
|
|
|
|
eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
|
|
EAP_VENDOR_IETF, EAP_TYPE_PEAP, "PEAP");
|
|
if (eap == NULL)
|
|
return -1;
|
|
|
|
eap->init = eap_peap_init;
|
|
eap->deinit = eap_peap_deinit;
|
|
eap->process = eap_peap_process;
|
|
eap->isKeyAvailable = eap_peap_isKeyAvailable;
|
|
eap->getKey = eap_peap_getKey;
|
|
eap->get_status = eap_peap_get_status;
|
|
eap->has_reauth_data = eap_peap_has_reauth_data;
|
|
eap->deinit_for_reauth = eap_peap_deinit_for_reauth;
|
|
eap->init_for_reauth = eap_peap_init_for_reauth;
|
|
|
|
ret = eap_peer_method_register(eap);
|
|
if (ret)
|
|
eap_peer_method_free(eap);
|
|
return ret;
|
|
}
|