1288 lines
36 KiB
C
1288 lines
36 KiB
C
/*
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* EAP peer method: EAP-PEAP (draft-josefsson-pppext-eap-tls-eap-10.txt)
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* Copyright (c) 2004-2008, 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 "crypto/sha1.h"
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#include "crypto/tls.h"
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#include "eap_common/eap_tlv_common.h"
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#include "eap_common/eap_peap_common.h"
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#include "eap_i.h"
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#include "eap_tls_common.h"
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#include "eap_config.h"
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#include "tncc.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-10.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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int reauth; /* reauthentication */
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u8 *key_data;
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struct wpabuf *pending_phase2_req;
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enum { NO_BINDING, OPTIONAL_BINDING, REQUIRE_BINDING } crypto_binding;
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int crypto_binding_used;
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u8 binding_nonce[32];
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u8 ipmk[40];
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u8 cmk[20];
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int soh; /* Whether IF-TNCCS-SOH (Statement of Health; Microsoft NAP)
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* is enabled. */
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};
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static int eap_peap_parse_phase1(struct eap_peap_data *data,
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const char *phase1)
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{
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const char *pos;
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pos = os_strstr(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 %d",
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data->force_peap_version);
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}
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if (os_strstr(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 key "
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"derivation");
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}
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if (os_strstr(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 authentication on "
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"tunneled EAP-Success");
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} else if (os_strstr(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 EAP-Success "
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"after receiving tunneled EAP-Success");
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} else if (os_strstr(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 after "
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"receiving tunneled EAP-Success");
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}
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if (os_strstr(phase1, "crypto_binding=0")) {
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data->crypto_binding = NO_BINDING;
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Do not use cryptobinding");
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} else if (os_strstr(phase1, "crypto_binding=1")) {
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data->crypto_binding = OPTIONAL_BINDING;
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Optional cryptobinding");
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} else if (os_strstr(phase1, "crypto_binding=2")) {
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data->crypto_binding = REQUIRE_BINDING;
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Require cryptobinding");
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}
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#ifdef EAP_TNC
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if (os_strstr(phase1, "tnc=soh2")) {
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data->soh = 2;
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wpa_printf(MSG_DEBUG, "EAP-PEAP: SoH version 2 enabled");
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} else if (os_strstr(phase1, "tnc=soh1")) {
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data->soh = 1;
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wpa_printf(MSG_DEBUG, "EAP-PEAP: SoH version 1 enabled");
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} else if (os_strstr(phase1, "tnc=soh")) {
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data->soh = 2;
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wpa_printf(MSG_DEBUG, "EAP-PEAP: SoH version 2 enabled");
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}
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#endif /* EAP_TNC */
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return 0;
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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 eap_peer_config *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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data->crypto_binding = OPTIONAL_BINDING;
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if (config && config->phase1 &&
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eap_peap_parse_phase1(data, config->phase1) < 0) {
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eap_peap_deinit(sm, data);
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return NULL;
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}
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if (eap_peer_select_phase2_methods(config, "auth=",
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&data->phase2_types,
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&data->num_phase2_types) < 0) {
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eap_peap_deinit(sm, data);
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return NULL;
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}
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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_peer_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_peer_tls_ssl_deinit(sm, &data->ssl);
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os_free(data->key_data);
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wpabuf_free(data->pending_phase2_req);
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os_free(data);
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}
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/**
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* eap_tlv_build_nak - Build EAP-TLV NAK message
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* @id: EAP identifier for the header
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* @nak_type: TLV type (EAP_TLV_*)
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* Returns: Buffer to the allocated EAP-TLV NAK message or %NULL on failure
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*
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* This funtion builds an EAP-TLV NAK message. The caller is responsible for
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* freeing the returned buffer.
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*/
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static struct wpabuf * eap_tlv_build_nak(int id, u16 nak_type)
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{
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struct wpabuf *msg;
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msg = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TLV, 10,
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EAP_CODE_RESPONSE, id);
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if (msg == NULL)
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return NULL;
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wpabuf_put_u8(msg, 0x80); /* Mandatory */
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wpabuf_put_u8(msg, EAP_TLV_NAK_TLV);
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wpabuf_put_be16(msg, 6); /* Length */
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wpabuf_put_be32(msg, 0); /* Vendor-Id */
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wpabuf_put_be16(msg, nak_type); /* NAK-Type */
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return msg;
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}
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static int eap_peap_get_isk(struct eap_sm *sm, struct eap_peap_data *data,
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u8 *isk, size_t isk_len)
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{
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u8 *key;
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size_t key_len;
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os_memset(isk, 0, isk_len);
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if (data->phase2_method == NULL || data->phase2_priv == NULL ||
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data->phase2_method->isKeyAvailable == NULL ||
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data->phase2_method->getKey == NULL)
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return 0;
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if (!data->phase2_method->isKeyAvailable(sm, data->phase2_priv) ||
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(key = data->phase2_method->getKey(sm, data->phase2_priv,
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&key_len)) == NULL) {
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Could not get key material "
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"from Phase 2");
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return -1;
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}
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if (key_len > isk_len)
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key_len = isk_len;
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os_memcpy(isk, key, key_len);
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os_free(key);
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return 0;
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}
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static int eap_peap_derive_cmk(struct eap_sm *sm, struct eap_peap_data *data)
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{
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u8 *tk;
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u8 isk[32], imck[60];
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/*
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* Tunnel key (TK) is the first 60 octets of the key generated by
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* phase 1 of PEAP (based on TLS).
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*/
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tk = data->key_data;
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if (tk == NULL)
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return -1;
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wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: TK", tk, 60);
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if (data->reauth &&
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tls_connection_resumed(sm->ssl_ctx, data->ssl.conn)) {
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/* Fast-connect: IPMK|CMK = TK */
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os_memcpy(data->ipmk, tk, 40);
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wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IPMK from TK",
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data->ipmk, 40);
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os_memcpy(data->cmk, tk + 40, 20);
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wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CMK from TK",
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data->cmk, 20);
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return 0;
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}
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if (eap_peap_get_isk(sm, data, isk, sizeof(isk)) < 0)
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return -1;
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wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: ISK", isk, sizeof(isk));
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/*
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* IPMK Seed = "Inner Methods Compound Keys" | ISK
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* TempKey = First 40 octets of TK
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* IPMK|CMK = PRF+(TempKey, IPMK Seed, 60)
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* (note: draft-josefsson-pppext-eap-tls-eap-10.txt includes a space
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* in the end of the label just before ISK; is that just a typo?)
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*/
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wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: TempKey", tk, 40);
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peap_prfplus(data->peap_version, tk, 40, "Inner Methods Compound Keys",
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isk, sizeof(isk), imck, sizeof(imck));
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wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IMCK (IPMKj)",
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imck, sizeof(imck));
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os_memcpy(data->ipmk, imck, 40);
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wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IPMK (S-IPMKj)", data->ipmk, 40);
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os_memcpy(data->cmk, imck + 40, 20);
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wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CMK (CMKj)", data->cmk, 20);
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return 0;
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}
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static int eap_tlv_add_cryptobinding(struct eap_sm *sm,
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struct eap_peap_data *data,
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struct wpabuf *buf)
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{
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u8 *mac;
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u8 eap_type = EAP_TYPE_PEAP;
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const u8 *addr[2];
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size_t len[2];
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u16 tlv_type;
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/* Compound_MAC: HMAC-SHA1-160(cryptobinding TLV | EAP type) */
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addr[0] = wpabuf_put(buf, 0);
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len[0] = 60;
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addr[1] = &eap_type;
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len[1] = 1;
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tlv_type = EAP_TLV_CRYPTO_BINDING_TLV;
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if (data->peap_version >= 2)
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tlv_type |= EAP_TLV_TYPE_MANDATORY;
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wpabuf_put_be16(buf, tlv_type);
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wpabuf_put_be16(buf, 56);
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wpabuf_put_u8(buf, 0); /* Reserved */
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wpabuf_put_u8(buf, data->peap_version); /* Version */
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wpabuf_put_u8(buf, data->peap_version); /* RecvVersion */
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wpabuf_put_u8(buf, 1); /* SubType: 0 = Request, 1 = Response */
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wpabuf_put_data(buf, data->binding_nonce, 32); /* Nonce */
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mac = wpabuf_put(buf, 20); /* Compound_MAC */
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wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC CMK", data->cmk, 20);
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wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC data 1",
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addr[0], len[0]);
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wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC data 2",
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addr[1], len[1]);
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hmac_sha1_vector(data->cmk, 20, 2, addr, len, mac);
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wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC", mac, SHA1_MAC_LEN);
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data->crypto_binding_used = 1;
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return 0;
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}
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/**
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* eap_tlv_build_result - Build EAP-TLV Result message
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* @id: EAP identifier for the header
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* @status: Status (EAP_TLV_RESULT_SUCCESS or EAP_TLV_RESULT_FAILURE)
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* Returns: Buffer to the allocated EAP-TLV Result message or %NULL on failure
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*
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* This funtion builds an EAP-TLV Result message. The caller is responsible for
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* freeing the returned buffer.
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*/
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static struct wpabuf * eap_tlv_build_result(struct eap_sm *sm,
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struct eap_peap_data *data,
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int crypto_tlv_used,
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int id, u16 status)
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{
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struct wpabuf *msg;
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size_t len;
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if (data->crypto_binding == NO_BINDING)
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crypto_tlv_used = 0;
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len = 6;
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if (crypto_tlv_used)
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len += 60; /* Cryptobinding TLV */
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msg = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TLV, len,
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EAP_CODE_RESPONSE, id);
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if (msg == NULL)
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return NULL;
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wpabuf_put_u8(msg, 0x80); /* Mandatory */
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wpabuf_put_u8(msg, EAP_TLV_RESULT_TLV);
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wpabuf_put_be16(msg, 2); /* Length */
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wpabuf_put_be16(msg, status); /* Status */
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if (crypto_tlv_used && eap_tlv_add_cryptobinding(sm, data, msg)) {
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wpabuf_free(msg);
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return NULL;
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}
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return msg;
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}
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static int eap_tlv_validate_cryptobinding(struct eap_sm *sm,
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struct eap_peap_data *data,
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const u8 *crypto_tlv,
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size_t crypto_tlv_len)
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{
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u8 buf[61], mac[SHA1_MAC_LEN];
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const u8 *pos;
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if (eap_peap_derive_cmk(sm, data) < 0) {
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Could not derive CMK");
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return -1;
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}
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if (crypto_tlv_len != 4 + 56) {
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Invalid cryptobinding TLV "
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"length %d", (int) crypto_tlv_len);
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return -1;
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}
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pos = crypto_tlv;
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pos += 4; /* TLV header */
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if (pos[1] != data->peap_version) {
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Cryptobinding TLV Version "
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"mismatch (was %d; expected %d)",
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pos[1], data->peap_version);
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return -1;
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}
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if (pos[3] != 0) {
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Unexpected Cryptobinding TLV "
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"SubType %d", pos[3]);
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return -1;
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}
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pos += 4;
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os_memcpy(data->binding_nonce, pos, 32);
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pos += 32; /* Nonce */
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/* Compound_MAC: HMAC-SHA1-160(cryptobinding TLV | EAP type) */
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os_memcpy(buf, crypto_tlv, 60);
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os_memset(buf + 4 + 4 + 32, 0, 20); /* Compound_MAC */
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buf[60] = EAP_TYPE_PEAP;
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wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Compound_MAC data",
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buf, sizeof(buf));
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hmac_sha1(data->cmk, 20, buf, sizeof(buf), mac);
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if (os_memcmp(mac, pos, SHA1_MAC_LEN) != 0) {
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Invalid Compound_MAC in "
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"cryptobinding TLV");
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wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Received MAC",
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pos, SHA1_MAC_LEN);
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wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Expected MAC",
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mac, SHA1_MAC_LEN);
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return -1;
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}
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wpa_printf(MSG_DEBUG, "EAP-PEAP: Valid cryptobinding TLV received");
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return 0;
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}
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/**
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* eap_tlv_process - Process a received EAP-TLV message and generate a response
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* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
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* @ret: Return values from EAP request validation and processing
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* @req: EAP-TLV request to be processed. The caller must have validated that
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* the buffer is large enough to contain full request (hdr->length bytes) and
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* that the EAP type is EAP_TYPE_TLV.
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* @resp: Buffer to return a pointer to the allocated response message. This
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* field should be initialized to %NULL before the call. The value will be
|
|
* updated if a response message is generated. The caller is responsible for
|
|
* freeing the allocated message.
|
|
* @force_failure: Force negotiation to fail
|
|
* Returns: 0 on success, -1 on failure
|
|
*/
|
|
static int eap_tlv_process(struct eap_sm *sm, struct eap_peap_data *data,
|
|
struct eap_method_ret *ret,
|
|
const struct wpabuf *req, struct wpabuf **resp,
|
|
int force_failure)
|
|
{
|
|
size_t left, tlv_len;
|
|
const u8 *pos;
|
|
const u8 *result_tlv = NULL, *crypto_tlv = NULL;
|
|
size_t result_tlv_len = 0, crypto_tlv_len = 0;
|
|
int tlv_type, mandatory;
|
|
|
|
/* Parse TLVs */
|
|
pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_TLV, req, &left);
|
|
if (pos == NULL)
|
|
return -1;
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TLV: Received TLVs", pos, left);
|
|
while (left >= 4) {
|
|
mandatory = !!(pos[0] & 0x80);
|
|
tlv_type = WPA_GET_BE16(pos) & 0x3fff;
|
|
pos += 2;
|
|
tlv_len = WPA_GET_BE16(pos);
|
|
pos += 2;
|
|
left -= 4;
|
|
if (tlv_len > left) {
|
|
wpa_printf(MSG_DEBUG, "EAP-TLV: TLV underrun "
|
|
"(tlv_len=%lu left=%lu)",
|
|
(unsigned long) tlv_len,
|
|
(unsigned long) left);
|
|
return -1;
|
|
}
|
|
switch (tlv_type) {
|
|
case EAP_TLV_RESULT_TLV:
|
|
result_tlv = pos;
|
|
result_tlv_len = tlv_len;
|
|
break;
|
|
case EAP_TLV_CRYPTO_BINDING_TLV:
|
|
crypto_tlv = pos;
|
|
crypto_tlv_len = tlv_len;
|
|
break;
|
|
default:
|
|
wpa_printf(MSG_DEBUG, "EAP-TLV: Unsupported TLV Type "
|
|
"%d%s", tlv_type,
|
|
mandatory ? " (mandatory)" : "");
|
|
if (mandatory) {
|
|
/* NAK TLV and ignore all TLVs in this packet.
|
|
*/
|
|
*resp = eap_tlv_build_nak(eap_get_id(req),
|
|
tlv_type);
|
|
return *resp == NULL ? -1 : 0;
|
|
}
|
|
/* Ignore this TLV, but process other TLVs */
|
|
break;
|
|
}
|
|
|
|
pos += tlv_len;
|
|
left -= tlv_len;
|
|
}
|
|
if (left) {
|
|
wpa_printf(MSG_DEBUG, "EAP-TLV: Last TLV too short in "
|
|
"Request (left=%lu)", (unsigned long) left);
|
|
return -1;
|
|
}
|
|
|
|
/* Process supported TLVs */
|
|
if (crypto_tlv && data->crypto_binding != NO_BINDING) {
|
|
wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Cryptobinding TLV",
|
|
crypto_tlv, crypto_tlv_len);
|
|
if (eap_tlv_validate_cryptobinding(sm, data, crypto_tlv - 4,
|
|
crypto_tlv_len + 4) < 0) {
|
|
if (result_tlv == NULL)
|
|
return -1;
|
|
force_failure = 1;
|
|
crypto_tlv = NULL; /* do not include Cryptobinding TLV
|
|
* in response, if the received
|
|
* cryptobinding was invalid. */
|
|
}
|
|
} else if (!crypto_tlv && data->crypto_binding == REQUIRE_BINDING) {
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: No cryptobinding TLV");
|
|
return -1;
|
|
}
|
|
|
|
if (result_tlv) {
|
|
int status, resp_status;
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TLV: Result TLV",
|
|
result_tlv, result_tlv_len);
|
|
if (result_tlv_len < 2) {
|
|
wpa_printf(MSG_INFO, "EAP-TLV: Too short Result TLV "
|
|
"(len=%lu)",
|
|
(unsigned long) result_tlv_len);
|
|
return -1;
|
|
}
|
|
status = WPA_GET_BE16(result_tlv);
|
|
if (status == EAP_TLV_RESULT_SUCCESS) {
|
|
wpa_printf(MSG_INFO, "EAP-TLV: TLV Result - Success "
|
|
"- EAP-TLV/Phase2 Completed");
|
|
if (force_failure) {
|
|
wpa_printf(MSG_INFO, "EAP-TLV: Earlier failure"
|
|
" - force failed Phase 2");
|
|
resp_status = EAP_TLV_RESULT_FAILURE;
|
|
ret->decision = DECISION_FAIL;
|
|
} else {
|
|
resp_status = EAP_TLV_RESULT_SUCCESS;
|
|
ret->decision = DECISION_UNCOND_SUCC;
|
|
}
|
|
} else if (status == EAP_TLV_RESULT_FAILURE) {
|
|
wpa_printf(MSG_INFO, "EAP-TLV: TLV Result - Failure");
|
|
resp_status = EAP_TLV_RESULT_FAILURE;
|
|
ret->decision = DECISION_FAIL;
|
|
} else {
|
|
wpa_printf(MSG_INFO, "EAP-TLV: Unknown TLV Result "
|
|
"Status %d", status);
|
|
resp_status = EAP_TLV_RESULT_FAILURE;
|
|
ret->decision = DECISION_FAIL;
|
|
}
|
|
ret->methodState = METHOD_DONE;
|
|
|
|
*resp = eap_tlv_build_result(sm, data, crypto_tlv != NULL,
|
|
eap_get_id(req), resp_status);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct wpabuf * eap_peapv2_tlv_eap_payload(struct wpabuf *buf)
|
|
{
|
|
struct wpabuf *e;
|
|
struct eap_tlv_hdr *tlv;
|
|
|
|
if (buf == NULL)
|
|
return NULL;
|
|
|
|
/* Encapsulate EAP packet in EAP-Payload TLV */
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAPv2: Add EAP-Payload TLV");
|
|
e = wpabuf_alloc(sizeof(*tlv) + wpabuf_len(buf));
|
|
if (e == NULL) {
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAPv2: Failed to allocate memory "
|
|
"for TLV encapsulation");
|
|
wpabuf_free(buf);
|
|
return NULL;
|
|
}
|
|
tlv = wpabuf_put(e, sizeof(*tlv));
|
|
tlv->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
|
|
EAP_TLV_EAP_PAYLOAD_TLV);
|
|
tlv->length = host_to_be16(wpabuf_len(buf));
|
|
wpabuf_put_buf(e, buf);
|
|
wpabuf_free(buf);
|
|
return e;
|
|
}
|
|
|
|
|
|
static int eap_peap_phase2_request(struct eap_sm *sm,
|
|
struct eap_peap_data *data,
|
|
struct eap_method_ret *ret,
|
|
struct wpabuf *req,
|
|
struct wpabuf **resp)
|
|
{
|
|
struct eap_hdr *hdr = wpabuf_mhead(req);
|
|
size_t len = be_to_host16(hdr->length);
|
|
u8 *pos;
|
|
struct eap_method_ret iret;
|
|
struct eap_peer_config *config = eap_get_config(sm);
|
|
|
|
if (len <= sizeof(struct eap_hdr)) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: too short "
|
|
"Phase 2 request (len=%lu)", (unsigned long) len);
|
|
return -1;
|
|
}
|
|
pos = (u8 *) (hdr + 1);
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Request: type=%d", *pos);
|
|
switch (*pos) {
|
|
case EAP_TYPE_IDENTITY:
|
|
*resp = eap_sm_buildIdentity(sm, hdr->identifier, 1);
|
|
break;
|
|
case EAP_TYPE_TLV:
|
|
os_memset(&iret, 0, sizeof(iret));
|
|
if (eap_tlv_process(sm, data, &iret, req, resp,
|
|
data->phase2_eap_started &&
|
|
!data->phase2_eap_success)) {
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_FAIL;
|
|
return -1;
|
|
}
|
|
if (iret.methodState == METHOD_DONE ||
|
|
iret.methodState == METHOD_MAY_CONT) {
|
|
ret->methodState = iret.methodState;
|
|
ret->decision = iret.decision;
|
|
data->phase2_success = 1;
|
|
}
|
|
break;
|
|
case EAP_TYPE_EXPANDED:
|
|
#ifdef EAP_TNC
|
|
if (data->soh) {
|
|
const u8 *epos;
|
|
size_t eleft;
|
|
|
|
epos = eap_hdr_validate(EAP_VENDOR_MICROSOFT, 0x21,
|
|
req, &eleft);
|
|
if (epos) {
|
|
struct wpabuf *buf;
|
|
wpa_printf(MSG_DEBUG,
|
|
"EAP-PEAP: SoH EAP Extensions");
|
|
buf = tncc_process_soh_request(data->soh,
|
|
epos, eleft);
|
|
if (buf) {
|
|
*resp = eap_msg_alloc(
|
|
EAP_VENDOR_MICROSOFT, 0x21,
|
|
wpabuf_len(buf),
|
|
EAP_CODE_RESPONSE,
|
|
hdr->identifier);
|
|
if (*resp == NULL) {
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_FAIL;
|
|
return -1;
|
|
}
|
|
wpabuf_put_buf(*resp, buf);
|
|
wpabuf_free(buf);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#endif /* EAP_TNC */
|
|
/* fall through */
|
|
default:
|
|
if (data->phase2_type.vendor == EAP_VENDOR_IETF &&
|
|
data->phase2_type.method == EAP_TYPE_NONE) {
|
|
size_t i;
|
|
for (i = 0; i < data->num_phase2_types; i++) {
|
|
if (data->phase2_types[i].vendor !=
|
|
EAP_VENDOR_IETF ||
|
|
data->phase2_types[i].method != *pos)
|
|
continue;
|
|
|
|
data->phase2_type.vendor =
|
|
data->phase2_types[i].vendor;
|
|
data->phase2_type.method =
|
|
data->phase2_types[i].method;
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Selected "
|
|
"Phase 2 EAP vendor %d method %d",
|
|
data->phase2_type.vendor,
|
|
data->phase2_type.method);
|
|
break;
|
|
}
|
|
}
|
|
if (*pos != data->phase2_type.method ||
|
|
*pos == EAP_TYPE_NONE) {
|
|
if (eap_peer_tls_phase2_nak(data->phase2_types,
|
|
data->num_phase2_types,
|
|
hdr, resp))
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
if (data->phase2_priv == NULL) {
|
|
data->phase2_method = eap_peer_get_eap_method(
|
|
data->phase2_type.vendor,
|
|
data->phase2_type.method);
|
|
if (data->phase2_method) {
|
|
sm->init_phase2 = 1;
|
|
data->phase2_priv =
|
|
data->phase2_method->init(sm);
|
|
sm->init_phase2 = 0;
|
|
}
|
|
}
|
|
if (data->phase2_priv == NULL || data->phase2_method == NULL) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: failed to initialize "
|
|
"Phase 2 EAP method %d", *pos);
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_FAIL;
|
|
return -1;
|
|
}
|
|
data->phase2_eap_started = 1;
|
|
os_memset(&iret, 0, sizeof(iret));
|
|
*resp = data->phase2_method->process(sm, data->phase2_priv,
|
|
&iret, req);
|
|
if ((iret.methodState == METHOD_DONE ||
|
|
iret.methodState == METHOD_MAY_CONT) &&
|
|
(iret.decision == DECISION_UNCOND_SUCC ||
|
|
iret.decision == DECISION_COND_SUCC)) {
|
|
data->phase2_eap_success = 1;
|
|
data->phase2_success = 1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (*resp == NULL &&
|
|
(config->pending_req_identity || config->pending_req_password ||
|
|
config->pending_req_otp || config->pending_req_new_password)) {
|
|
wpabuf_free(data->pending_phase2_req);
|
|
data->pending_phase2_req = wpabuf_alloc_copy(hdr, len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int eap_peap_decrypt(struct eap_sm *sm, struct eap_peap_data *data,
|
|
struct eap_method_ret *ret,
|
|
const struct eap_hdr *req,
|
|
const struct wpabuf *in_data,
|
|
struct wpabuf **out_data)
|
|
{
|
|
struct wpabuf *in_decrypted = NULL;
|
|
int res, skip_change = 0;
|
|
struct eap_hdr *hdr, *rhdr;
|
|
struct wpabuf *resp = NULL;
|
|
size_t len;
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: received %lu bytes encrypted data for"
|
|
" Phase 2", (unsigned long) wpabuf_len(in_data));
|
|
|
|
if (data->pending_phase2_req) {
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Pending Phase 2 request - "
|
|
"skip decryption and use old data");
|
|
/* Clear TLS reassembly state. */
|
|
eap_peer_tls_reset_input(&data->ssl);
|
|
in_decrypted = data->pending_phase2_req;
|
|
data->pending_phase2_req = NULL;
|
|
skip_change = 1;
|
|
goto continue_req;
|
|
}
|
|
|
|
if (wpabuf_len(in_data) == 0 && sm->workaround &&
|
|
data->phase2_success) {
|
|
/*
|
|
* Cisco ACS seems to be using TLS ACK to terminate
|
|
* EAP-PEAPv0/GTC. Try to reply with TLS ACK.
|
|
*/
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Received TLS ACK, but "
|
|
"expected data - acknowledge with TLS ACK since "
|
|
"Phase 2 has been completed");
|
|
ret->decision = DECISION_COND_SUCC;
|
|
ret->methodState = METHOD_DONE;
|
|
return 1;
|
|
} else if (wpabuf_len(in_data) == 0) {
|
|
/* Received TLS ACK - requesting more fragments */
|
|
return eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_PEAP,
|
|
data->peap_version,
|
|
req->identifier, NULL, out_data);
|
|
}
|
|
|
|
res = eap_peer_tls_decrypt(sm, &data->ssl, in_data, &in_decrypted);
|
|
if (res)
|
|
return res;
|
|
|
|
continue_req:
|
|
wpa_hexdump_buf(MSG_DEBUG, "EAP-PEAP: Decrypted Phase 2 EAP",
|
|
in_decrypted);
|
|
|
|
hdr = wpabuf_mhead(in_decrypted);
|
|
if (wpabuf_len(in_decrypted) == 5 && hdr->code == EAP_CODE_REQUEST &&
|
|
be_to_host16(hdr->length) == 5 &&
|
|
eap_get_type(in_decrypted) == EAP_TYPE_IDENTITY) {
|
|
/* At least FreeRADIUS seems to send full EAP header with
|
|
* EAP Request Identity */
|
|
skip_change = 1;
|
|
}
|
|
if (wpabuf_len(in_decrypted) >= 5 && hdr->code == EAP_CODE_REQUEST &&
|
|
eap_get_type(in_decrypted) == EAP_TYPE_TLV) {
|
|
skip_change = 1;
|
|
}
|
|
|
|
if (data->peap_version == 0 && !skip_change) {
|
|
struct eap_hdr *nhdr;
|
|
struct wpabuf *nmsg = wpabuf_alloc(sizeof(struct eap_hdr) +
|
|
wpabuf_len(in_decrypted));
|
|
if (nmsg == NULL) {
|
|
wpabuf_free(in_decrypted);
|
|
return 0;
|
|
}
|
|
nhdr = wpabuf_put(nmsg, sizeof(*nhdr));
|
|
wpabuf_put_buf(nmsg, in_decrypted);
|
|
nhdr->code = req->code;
|
|
nhdr->identifier = req->identifier;
|
|
nhdr->length = host_to_be16(sizeof(struct eap_hdr) +
|
|
wpabuf_len(in_decrypted));
|
|
|
|
wpabuf_free(in_decrypted);
|
|
in_decrypted = nmsg;
|
|
}
|
|
|
|
if (data->peap_version >= 2) {
|
|
struct eap_tlv_hdr *tlv;
|
|
struct wpabuf *nmsg;
|
|
|
|
if (wpabuf_len(in_decrypted) < sizeof(*tlv) + sizeof(*hdr)) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAPv2: Too short Phase 2 "
|
|
"EAP TLV");
|
|
wpabuf_free(in_decrypted);
|
|
return 0;
|
|
}
|
|
tlv = wpabuf_mhead(in_decrypted);
|
|
if ((be_to_host16(tlv->tlv_type) & 0x3fff) !=
|
|
EAP_TLV_EAP_PAYLOAD_TLV) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAPv2: Not an EAP TLV");
|
|
wpabuf_free(in_decrypted);
|
|
return 0;
|
|
}
|
|
if (sizeof(*tlv) + be_to_host16(tlv->length) >
|
|
wpabuf_len(in_decrypted)) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAPv2: Invalid EAP TLV "
|
|
"length");
|
|
wpabuf_free(in_decrypted);
|
|
return 0;
|
|
}
|
|
hdr = (struct eap_hdr *) (tlv + 1);
|
|
if (be_to_host16(hdr->length) > be_to_host16(tlv->length)) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAPv2: No room for full "
|
|
"EAP packet in EAP TLV");
|
|
wpabuf_free(in_decrypted);
|
|
return 0;
|
|
}
|
|
|
|
nmsg = wpabuf_alloc(be_to_host16(hdr->length));
|
|
if (nmsg == NULL) {
|
|
wpabuf_free(in_decrypted);
|
|
return 0;
|
|
}
|
|
|
|
wpabuf_put_data(nmsg, hdr, be_to_host16(hdr->length));
|
|
wpabuf_free(in_decrypted);
|
|
in_decrypted = nmsg;
|
|
}
|
|
|
|
hdr = wpabuf_mhead(in_decrypted);
|
|
if (wpabuf_len(in_decrypted) < sizeof(*hdr)) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Too short Phase 2 "
|
|
"EAP frame (len=%lu)",
|
|
(unsigned long) wpabuf_len(in_decrypted));
|
|
wpabuf_free(in_decrypted);
|
|
return 0;
|
|
}
|
|
len = be_to_host16(hdr->length);
|
|
if (len > wpabuf_len(in_decrypted)) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Length mismatch in "
|
|
"Phase 2 EAP frame (len=%lu hdr->length=%lu)",
|
|
(unsigned long) wpabuf_len(in_decrypted),
|
|
(unsigned long) len);
|
|
wpabuf_free(in_decrypted);
|
|
return 0;
|
|
}
|
|
if (len < wpabuf_len(in_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) wpabuf_len(in_decrypted));
|
|
}
|
|
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, in_decrypted,
|
|
&resp)) {
|
|
wpabuf_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;
|
|
wpabuf_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) {
|
|
wpabuf_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 = wpabuf_alloc(sizeof(struct eap_hdr));
|
|
if (resp) {
|
|
rhdr = wpabuf_put(resp, sizeof(*rhdr));
|
|
rhdr->code = EAP_CODE_SUCCESS;
|
|
rhdr->identifier = hdr->identifier;
|
|
rhdr->length =
|
|
host_to_be16(sizeof(*rhdr));
|
|
}
|
|
} 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 = wpabuf_alloc(sizeof(struct eap_hdr));
|
|
if (resp) {
|
|
rhdr = wpabuf_put(resp, sizeof(*rhdr));
|
|
rhdr->code = EAP_CODE_FAILURE;
|
|
rhdr->identifier = hdr->identifier;
|
|
rhdr->length = host_to_be16(sizeof(*rhdr));
|
|
}
|
|
break;
|
|
default:
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Unexpected code=%d in "
|
|
"Phase 2 EAP header", hdr->code);
|
|
break;
|
|
}
|
|
|
|
wpabuf_free(in_decrypted);
|
|
|
|
if (resp) {
|
|
int skip_change2 = 0;
|
|
struct wpabuf *rmsg, buf;
|
|
|
|
wpa_hexdump_buf_key(MSG_DEBUG,
|
|
"EAP-PEAP: Encrypting Phase 2 data", resp);
|
|
/* PEAP version changes */
|
|
if (data->peap_version >= 2) {
|
|
resp = eap_peapv2_tlv_eap_payload(resp);
|
|
if (resp == NULL)
|
|
return -1;
|
|
}
|
|
if (wpabuf_len(resp) >= 5 &&
|
|
wpabuf_head_u8(resp)[0] == EAP_CODE_RESPONSE &&
|
|
eap_get_type(resp) == EAP_TYPE_TLV)
|
|
skip_change2 = 1;
|
|
rmsg = resp;
|
|
if (data->peap_version == 0 && !skip_change2) {
|
|
wpabuf_set(&buf, wpabuf_head_u8(resp) +
|
|
sizeof(struct eap_hdr),
|
|
wpabuf_len(resp) - sizeof(struct eap_hdr));
|
|
rmsg = &buf;
|
|
}
|
|
|
|
if (eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_PEAP,
|
|
data->peap_version, req->identifier,
|
|
rmsg, out_data)) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Failed to encrypt "
|
|
"a Phase 2 frame");
|
|
}
|
|
wpabuf_free(resp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct wpabuf * eap_peap_process(struct eap_sm *sm, void *priv,
|
|
struct eap_method_ret *ret,
|
|
const struct wpabuf *reqData)
|
|
{
|
|
const struct eap_hdr *req;
|
|
size_t left;
|
|
int res;
|
|
u8 flags, id;
|
|
struct wpabuf *resp;
|
|
const u8 *pos;
|
|
struct eap_peap_data *data = priv;
|
|
|
|
pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_PEAP, ret,
|
|
reqData, &left, &flags);
|
|
if (pos == NULL)
|
|
return NULL;
|
|
req = wpabuf_head(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_TLS_VERSION_MASK,
|
|
data->peap_version);
|
|
if ((flags & EAP_TLS_VERSION_MASK) < data->peap_version)
|
|
data->peap_version = flags & EAP_TLS_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) {
|
|
struct wpabuf msg;
|
|
wpabuf_set(&msg, pos, left);
|
|
res = eap_peap_decrypt(sm, data, ret, req, &msg, &resp);
|
|
} else {
|
|
res = eap_peer_tls_process_helper(sm, &data->ssl,
|
|
EAP_TYPE_PEAP,
|
|
data->peap_version, id, pos,
|
|
left, &resp);
|
|
|
|
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_peer_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) {
|
|
struct wpabuf msg;
|
|
/*
|
|
* Application data included in the handshake message.
|
|
*/
|
|
wpabuf_free(data->pending_phase2_req);
|
|
data->pending_phase2_req = resp;
|
|
resp = NULL;
|
|
wpabuf_set(&msg, pos, left);
|
|
res = eap_peap_decrypt(sm, data, ret, req, &msg,
|
|
&resp);
|
|
}
|
|
}
|
|
|
|
if (ret->methodState == METHOD_DONE) {
|
|
ret->allowNotifications = FALSE;
|
|
}
|
|
|
|
if (res == 1) {
|
|
wpabuf_free(resp);
|
|
return eap_peer_tls_build_ack(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;
|
|
wpabuf_free(data->pending_phase2_req);
|
|
data->pending_phase2_req = NULL;
|
|
data->crypto_binding_used = 0;
|
|
}
|
|
|
|
|
|
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_peer_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;
|
|
data->reauth = 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_peer_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;
|
|
|
|
if (data->crypto_binding_used) {
|
|
u8 csk[128];
|
|
/*
|
|
* Note: It looks like Microsoft implementation requires null
|
|
* termination for this label while the one used for deriving
|
|
* IPMK|CMK did not use null termination.
|
|
*/
|
|
peap_prfplus(data->peap_version, data->ipmk, 40,
|
|
"Session Key Generating Function",
|
|
(u8 *) "\00", 1, csk, sizeof(csk));
|
|
wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CSK", csk, sizeof(csk));
|
|
os_memcpy(key, csk, EAP_TLS_KEY_LEN);
|
|
wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Derived key",
|
|
key, EAP_TLS_KEY_LEN);
|
|
} else
|
|
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;
|
|
}
|