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@@ -0,0 +1,1807 @@
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+/*
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+ * EAP peer method: EAP-FAST (RFC 4851)
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+ * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
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+ *
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+ * This software may be distributed under the terms of the BSD license.
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+ * See README for more details.
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+ */
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+
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+#include "utils/includes.h"
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+
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+#include "utils/common.h"
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+#include "tls/tls.h"
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+#include "crypto/sha1.h"
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+#include "eap_peer/eap_tlv_common.h"
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+#include "eap_peer/eap_methods.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 "eap_fast_pac.h"
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+
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+#include "eap_fast_pac.c"
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+
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+/* TODO:
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+ * - test session resumption and enable it if it interoperates
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+ * - password change (pending mschapv2 packet; replay decrypted packet)
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+ */
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+
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+
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+static void eap_fast_deinit(struct eap_sm *sm, void *priv);
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+
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+
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+struct eap_fast_data {
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+ struct eap_ssl_data ssl;
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+
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+ int fast_version;
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+
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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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+
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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 resuming; /* starting a resumed session */
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+ struct eap_fast_key_block_provisioning *key_block_p;
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+#define EAP_FAST_PROV_UNAUTH 1
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+#define EAP_FAST_PROV_AUTH 2
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+ int provisioning_allowed; /* Allowed PAC provisioning modes */
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+ int provisioning; /* doing PAC provisioning (not the normal auth) */
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+ int anon_provisioning; /* doing anonymous (unauthenticated)
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+ * provisioning */
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+ int session_ticket_used;
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+
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+ u8 key_data[EAP_FAST_KEY_LEN];
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+ u8 *session_id;
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+ size_t id_len;
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+ u8 emsk[EAP_EMSK_LEN];
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+ int success;
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+
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+ struct eap_fast_pac *pac;
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+ struct eap_fast_pac *current_pac;
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+ size_t max_pac_list_len;
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+ int use_pac_binary_format;
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+
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+ u8 simck[EAP_FAST_SIMCK_LEN];
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+ int simck_idx;
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+
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+ struct wpabuf *pending_phase2_req;
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+ struct wpabuf *pending_resp;
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+};
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+
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+
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+static int eap_fast_session_ticket_cb(void *ctx, const u8 *ticket, size_t len,
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+ const u8 *client_random,
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+ const u8 *server_random,
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+ u8 *master_secret)
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+{
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+ struct eap_fast_data *data = ctx;
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+
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+ wpa_printf(MSG_DEBUG, "EAP-FAST: SessionTicket callback");
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+
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+ if (client_random == NULL || server_random == NULL ||
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+ master_secret == NULL) {
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+ wpa_printf(MSG_DEBUG, "EAP-FAST: SessionTicket failed - fall "
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+ "back to full TLS handshake");
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+ data->session_ticket_used = 0;
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+ if (data->provisioning_allowed) {
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+ wpa_printf(MSG_DEBUG, "EAP-FAST: Try to provision a "
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+ "new PAC-Key");
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+ data->provisioning = 1;
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+ data->current_pac = NULL;
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+ }
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+ return 0;
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+ }
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+
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+ wpa_hexdump(MSG_DEBUG, "EAP-FAST: SessionTicket", ticket, len);
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+
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+ if (data->current_pac == NULL) {
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+ wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC-Key available for "
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+ "using SessionTicket");
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+ data->session_ticket_used = 0;
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+ return 0;
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+ }
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+
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+ eap_fast_derive_master_secret(data->current_pac->pac_key,
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+ server_random, client_random,
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+ master_secret);
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+
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+ data->session_ticket_used = 1;
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+
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+ return 1;
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+}
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+
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+
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+static void eap_fast_parse_phase1(struct eap_fast_data *data,
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+ const char *phase1)
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+{
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+ const char *pos;
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+
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+ pos = os_strstr(phase1, "fast_provisioning=");
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+ if (pos) {
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+ data->provisioning_allowed = atoi(pos + 18);
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+ wpa_printf(MSG_INFO, "EAP-FAST: Automatic PAC provisioning "
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+ "mode: %d", data->provisioning_allowed);
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+ }
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+
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+ pos = os_strstr(phase1, "fast_max_pac_list_len=");
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+ if (pos) {
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+ data->max_pac_list_len = atoi(pos + 22);
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+ if (data->max_pac_list_len == 0)
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+ data->max_pac_list_len = 1;
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+ wpa_printf(MSG_INFO, "EAP-FAST: Maximum PAC list length: %lu",
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+ (unsigned long) data->max_pac_list_len);
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+ }
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+
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+ pos = os_strstr(phase1, "fast_pac_format=binary");
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+ if (pos) {
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+ data->use_pac_binary_format = 1;
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+ wpa_printf(MSG_INFO, "EAP-FAST: Using binary format for PAC "
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+ "list");
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+ }
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+}
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+
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+
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+static void * eap_fast_init(struct eap_sm *sm)
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+{
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+ struct eap_fast_data *data;
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+ struct eap_peer_config *config = eap_get_config(sm);
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+
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+ if (config == NULL)
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+ return NULL;
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+
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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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+ data->fast_version = EAP_FAST_VERSION;
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+ data->max_pac_list_len = 10;
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+
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+ if (config->phase1)
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+ eap_fast_parse_phase1(data, config->phase1);
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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_fast_deinit(sm, data);
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+ return NULL;
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+ }
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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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+
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+ if (eap_peer_tls_ssl_init(sm, &data->ssl, config, EAP_TYPE_FAST)) {
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+ wpa_printf(MSG_INFO, "EAP-FAST: Failed to initialize SSL.");
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+ eap_fast_deinit(sm, data);
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+ return NULL;
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+ }
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+
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+ if (tls_connection_set_session_ticket_cb(sm->ssl_ctx, data->ssl.conn,
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+ eap_fast_session_ticket_cb,
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+ data) < 0) {
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+ wpa_printf(MSG_INFO, "EAP-FAST: Failed to set SessionTicket "
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+ "callback");
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+ eap_fast_deinit(sm, data);
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+ return NULL;
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+ }
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+
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+ /*
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+ * The local RADIUS server in a Cisco AP does not seem to like empty
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+ * fragments before data, so disable that workaround for CBC.
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+ * TODO: consider making this configurable
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+ */
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+ if (tls_connection_enable_workaround(sm->ssl_ctx, data->ssl.conn)) {
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+ wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to enable TLS "
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+ "workarounds");
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+ }
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+
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+ if (!config->pac_file) {
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+ wpa_printf(MSG_INFO, "EAP-FAST: No PAC file configured");
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+ eap_fast_deinit(sm, data);
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+ return NULL;
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+ }
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+
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+ if (data->use_pac_binary_format &&
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+ eap_fast_load_pac_bin(sm, &data->pac, config->pac_file) < 0) {
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+ wpa_printf(MSG_INFO, "EAP-FAST: Failed to load PAC file");
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+ eap_fast_deinit(sm, data);
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+ return NULL;
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+ }
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+
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+ if (!data->use_pac_binary_format &&
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+ eap_fast_load_pac(sm, &data->pac, config->pac_file) < 0) {
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+ wpa_printf(MSG_INFO, "EAP-FAST: Failed to load PAC file");
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+ eap_fast_deinit(sm, data);
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+ return NULL;
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+ }
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+ eap_fast_pac_list_truncate(data->pac, data->max_pac_list_len);
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+
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+ if (data->pac == NULL && !data->provisioning_allowed) {
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+ wpa_printf(MSG_INFO, "EAP-FAST: No PAC configured and "
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+ "provisioning disabled");
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+ eap_fast_deinit(sm, data);
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+ return NULL;
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+ }
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+
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+ return data;
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+}
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+
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+
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+static void eap_fast_deinit(struct eap_sm *sm, void *priv)
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+{
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+ struct eap_fast_data *data = priv;
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+ struct eap_fast_pac *pac, *prev;
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+
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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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+ os_free(data->key_block_p);
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+ eap_peer_tls_ssl_deinit(sm, &data->ssl);
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+
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+ pac = data->pac;
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+ prev = NULL;
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+ while (pac) {
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+ prev = pac;
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+ pac = pac->next;
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+ eap_fast_free_pac(prev);
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+ }
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+ os_memset(data->key_data, 0, EAP_FAST_KEY_LEN);
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+ os_memset(data->emsk, 0, EAP_EMSK_LEN);
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+ os_free(data->session_id);
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+ wpabuf_free(data->pending_phase2_req);
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+ wpabuf_free(data->pending_resp);
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+ os_free(data);
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+}
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+
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+
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+static int eap_fast_derive_msk(struct eap_fast_data *data)
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+{
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+ if (eap_fast_derive_eap_msk(data->simck, data->key_data) < 0 ||
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+ eap_fast_derive_eap_emsk(data->simck, data->emsk) < 0)
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+ return -1;
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+ data->success = 1;
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+ return 0;
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+}
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+
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+
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+static int eap_fast_derive_key_auth(struct eap_sm *sm,
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+ struct eap_fast_data *data)
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+{
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+ u8 *sks;
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+
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+ /* RFC 4851, Section 5.1:
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+ * Extra key material after TLS key_block: session_key_seed[40]
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+ */
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+
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+ sks = eap_fast_derive_key(sm->ssl_ctx, data->ssl.conn,
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+ EAP_FAST_SKS_LEN);
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+ if (sks == NULL) {
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+ wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to derive "
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+ "session_key_seed");
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+ return -1;
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+ }
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+
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+ /*
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+ * RFC 4851, Section 5.2:
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+ * S-IMCK[0] = session_key_seed
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+ */
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+ wpa_hexdump_key(MSG_DEBUG,
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+ "EAP-FAST: session_key_seed (SKS = S-IMCK[0])",
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+ sks, EAP_FAST_SKS_LEN);
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+ data->simck_idx = 0;
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+ os_memcpy(data->simck, sks, EAP_FAST_SIMCK_LEN);
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+ os_free(sks);
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+ return 0;
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+}
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+
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+
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+static int eap_fast_derive_key_provisioning(struct eap_sm *sm,
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+ struct eap_fast_data *data)
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+{
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+ os_free(data->key_block_p);
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+ data->key_block_p = (struct eap_fast_key_block_provisioning *)
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+ eap_fast_derive_key(sm->ssl_ctx, data->ssl.conn,
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+ sizeof(*data->key_block_p));
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+ if (data->key_block_p == NULL) {
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+ wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to derive key block");
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+ return -1;
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+ }
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+ /*
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+ * RFC 4851, Section 5.2:
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+ * S-IMCK[0] = session_key_seed
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+ */
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+ wpa_hexdump_key(MSG_DEBUG,
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+ "EAP-FAST: session_key_seed (SKS = S-IMCK[0])",
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+ data->key_block_p->session_key_seed,
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+ sizeof(data->key_block_p->session_key_seed));
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+ data->simck_idx = 0;
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+ os_memcpy(data->simck, data->key_block_p->session_key_seed,
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+ EAP_FAST_SIMCK_LEN);
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+ wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: server_challenge",
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+ data->key_block_p->server_challenge,
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+ sizeof(data->key_block_p->server_challenge));
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+ wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: client_challenge",
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+ data->key_block_p->client_challenge,
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+ sizeof(data->key_block_p->client_challenge));
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+ return 0;
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+}
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+
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+
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+static int eap_fast_derive_keys(struct eap_sm *sm, struct eap_fast_data *data)
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+{
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+ int res;
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+
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+ if (data->anon_provisioning)
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+ res = eap_fast_derive_key_provisioning(sm, data);
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+ else
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+ res = eap_fast_derive_key_auth(sm, data);
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+ return res;
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+}
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+
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+
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+static int eap_fast_init_phase2_method(struct eap_sm *sm,
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+ struct eap_fast_data *data)
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+{
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+ data->phase2_method =
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+ eap_peer_get_eap_method(data->phase2_type.vendor,
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+ data->phase2_type.method);
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+ if (data->phase2_method == NULL)
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+ return -1;
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+
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+ if (data->key_block_p) {
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+ sm->auth_challenge = data->key_block_p->server_challenge;
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+ sm->peer_challenge = data->key_block_p->client_challenge;
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+ }
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+ sm->init_phase2 = 1;
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+ data->phase2_priv = data->phase2_method->init(sm);
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+ sm->init_phase2 = 0;
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+ sm->auth_challenge = NULL;
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+ sm->peer_challenge = NULL;
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+
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+ return data->phase2_priv == NULL ? -1 : 0;
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+}
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+
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+
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+static int eap_fast_select_phase2_method(struct eap_fast_data *data, u8 type)
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+{
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+ size_t i;
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+
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+ /* TODO: TNC with anonymous provisioning; need to require both
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+ * completed MSCHAPv2 and TNC */
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+
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+ if (data->anon_provisioning && type != EAP_TYPE_MSCHAPV2) {
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+ wpa_printf(MSG_INFO, "EAP-FAST: Only EAP-MSCHAPv2 is allowed "
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+ "during unauthenticated provisioning; reject phase2"
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+ " type %d", type);
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+ return -1;
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+ }
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+
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+#ifdef EAP_TNC
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+ if (type == EAP_TYPE_TNC) {
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+ data->phase2_type.vendor = EAP_VENDOR_IETF;
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+ data->phase2_type.method = EAP_TYPE_TNC;
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+ wpa_printf(MSG_DEBUG, "EAP-FAST: Selected Phase 2 EAP "
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+ "vendor %d method %d for TNC",
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+ data->phase2_type.vendor,
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+ data->phase2_type.method);
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+ return 0;
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+ }
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+#endif /* EAP_TNC */
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+
|
|
|
+ for (i = 0; i < data->num_phase2_types; i++) {
|
|
|
+ if (data->phase2_types[i].vendor != EAP_VENDOR_IETF ||
|
|
|
+ data->phase2_types[i].method != type)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ data->phase2_type.vendor = data->phase2_types[i].vendor;
|
|
|
+ data->phase2_type.method = data->phase2_types[i].method;
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Selected Phase 2 EAP "
|
|
|
+ "vendor %d method %d",
|
|
|
+ data->phase2_type.vendor,
|
|
|
+ data->phase2_type.method);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (type != data->phase2_type.method || type == EAP_TYPE_NONE)
|
|
|
+ return -1;
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_phase2_request(struct eap_sm *sm,
|
|
|
+ struct eap_fast_data *data,
|
|
|
+ struct eap_method_ret *ret,
|
|
|
+ struct eap_hdr *hdr,
|
|
|
+ struct wpabuf **resp)
|
|
|
+{
|
|
|
+ size_t len = be_to_host16(hdr->length);
|
|
|
+ u8 *pos;
|
|
|
+ struct eap_method_ret iret;
|
|
|
+ struct eap_peer_config *config = eap_get_config(sm);
|
|
|
+ struct wpabuf msg;
|
|
|
+
|
|
|
+ if (len <= sizeof(struct eap_hdr)) {
|
|
|
+ wpa_printf(MSG_INFO, "EAP-FAST: too short "
|
|
|
+ "Phase 2 request (len=%lu)", (unsigned long) len);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+ pos = (u8 *) (hdr + 1);
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 Request: type=%d", *pos);
|
|
|
+ if (*pos == EAP_TYPE_IDENTITY) {
|
|
|
+ *resp = eap_sm_buildIdentity(sm, hdr->identifier, 1);
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (data->phase2_priv && data->phase2_method &&
|
|
|
+ *pos != data->phase2_type.method) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 EAP sequence - "
|
|
|
+ "deinitialize previous method");
|
|
|
+ data->phase2_method->deinit(sm, data->phase2_priv);
|
|
|
+ data->phase2_method = NULL;
|
|
|
+ data->phase2_priv = NULL;
|
|
|
+ data->phase2_type.vendor = EAP_VENDOR_IETF;
|
|
|
+ data->phase2_type.method = EAP_TYPE_NONE;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (data->phase2_type.vendor == EAP_VENDOR_IETF &&
|
|
|
+ data->phase2_type.method == EAP_TYPE_NONE &&
|
|
|
+ eap_fast_select_phase2_method(data, *pos) < 0) {
|
|
|
+ if (eap_peer_tls_phase2_nak(data->phase2_types,
|
|
|
+ data->num_phase2_types,
|
|
|
+ hdr, resp))
|
|
|
+ return -1;
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ if ((data->phase2_priv == NULL &&
|
|
|
+ eap_fast_init_phase2_method(sm, data) < 0) ||
|
|
|
+ data->phase2_method == NULL) {
|
|
|
+ wpa_printf(MSG_INFO, "EAP-FAST: Failed to initialize "
|
|
|
+ "Phase 2 EAP method %d", *pos);
|
|
|
+ ret->methodState = METHOD_DONE;
|
|
|
+ ret->decision = DECISION_FAIL;
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ os_memset(&iret, 0, sizeof(iret));
|
|
|
+ wpabuf_set(&msg, hdr, len);
|
|
|
+ *resp = data->phase2_method->process(sm, data->phase2_priv, &iret,
|
|
|
+ &msg);
|
|
|
+ if (*resp == NULL ||
|
|
|
+ (iret.methodState == METHOD_DONE &&
|
|
|
+ iret.decision == DECISION_FAIL)) {
|
|
|
+ ret->methodState = METHOD_DONE;
|
|
|
+ ret->decision = DECISION_FAIL;
|
|
|
+ } else if ((iret.methodState == METHOD_DONE ||
|
|
|
+ iret.methodState == METHOD_MAY_CONT) &&
|
|
|
+ (iret.decision == DECISION_UNCOND_SUCC ||
|
|
|
+ iret.decision == DECISION_COND_SUCC)) {
|
|
|
+ data->phase2_success = 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (*resp == NULL && config &&
|
|
|
+ (config->pending_req_identity || config->pending_req_password ||
|
|
|
+ config->pending_req_otp || config->pending_req_new_password ||
|
|
|
+ config->pending_req_sim)) {
|
|
|
+ wpabuf_clear_free(data->pending_phase2_req);
|
|
|
+ data->pending_phase2_req = wpabuf_alloc_copy(hdr, len);
|
|
|
+ } else if (*resp == NULL)
|
|
|
+ return -1;
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static struct wpabuf * eap_fast_tlv_nak(int vendor_id, int tlv_type)
|
|
|
+{
|
|
|
+ struct wpabuf *buf;
|
|
|
+ struct eap_tlv_nak_tlv *nak;
|
|
|
+ buf = wpabuf_alloc(sizeof(*nak));
|
|
|
+ if (buf == NULL)
|
|
|
+ return NULL;
|
|
|
+ nak = wpabuf_put(buf, sizeof(*nak));
|
|
|
+ nak->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY | EAP_TLV_NAK_TLV);
|
|
|
+ nak->length = host_to_be16(6);
|
|
|
+ nak->vendor_id = host_to_be32(vendor_id);
|
|
|
+ nak->nak_type = host_to_be16(tlv_type);
|
|
|
+ return buf;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static struct wpabuf * eap_fast_tlv_result(int status, int intermediate)
|
|
|
+{
|
|
|
+ struct wpabuf *buf;
|
|
|
+ struct eap_tlv_intermediate_result_tlv *result;
|
|
|
+ buf = wpabuf_alloc(sizeof(*result));
|
|
|
+ if (buf == NULL)
|
|
|
+ return NULL;
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Add %sResult TLV(status=%d)",
|
|
|
+ intermediate ? "Intermediate " : "", status);
|
|
|
+ result = wpabuf_put(buf, sizeof(*result));
|
|
|
+ result->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
|
|
|
+ (intermediate ?
|
|
|
+ EAP_TLV_INTERMEDIATE_RESULT_TLV :
|
|
|
+ EAP_TLV_RESULT_TLV));
|
|
|
+ result->length = host_to_be16(2);
|
|
|
+ result->status = host_to_be16(status);
|
|
|
+ return buf;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static struct wpabuf * eap_fast_tlv_pac_ack(void)
|
|
|
+{
|
|
|
+ struct wpabuf *buf;
|
|
|
+ struct eap_tlv_result_tlv *res;
|
|
|
+ struct eap_tlv_pac_ack_tlv *ack;
|
|
|
+
|
|
|
+ buf = wpabuf_alloc(sizeof(*res) + sizeof(*ack));
|
|
|
+ if (buf == NULL)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Add PAC TLV (ack)");
|
|
|
+ ack = wpabuf_put(buf, sizeof(*ack));
|
|
|
+ ack->tlv_type = host_to_be16(EAP_TLV_PAC_TLV |
|
|
|
+ EAP_TLV_TYPE_MANDATORY);
|
|
|
+ ack->length = host_to_be16(sizeof(*ack) - sizeof(struct eap_tlv_hdr));
|
|
|
+ ack->pac_type = host_to_be16(PAC_TYPE_PAC_ACKNOWLEDGEMENT);
|
|
|
+ ack->pac_len = host_to_be16(2);
|
|
|
+ ack->result = host_to_be16(EAP_TLV_RESULT_SUCCESS);
|
|
|
+
|
|
|
+ return buf;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static struct wpabuf * eap_fast_process_eap_payload_tlv(
|
|
|
+ struct eap_sm *sm, struct eap_fast_data *data,
|
|
|
+ struct eap_method_ret *ret,
|
|
|
+ u8 *eap_payload_tlv, size_t eap_payload_tlv_len)
|
|
|
+{
|
|
|
+ struct eap_hdr *hdr;
|
|
|
+ struct wpabuf *resp = NULL;
|
|
|
+
|
|
|
+ if (eap_payload_tlv_len < sizeof(*hdr)) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: too short EAP "
|
|
|
+ "Payload TLV (len=%lu)",
|
|
|
+ (unsigned long) eap_payload_tlv_len);
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ hdr = (struct eap_hdr *) eap_payload_tlv;
|
|
|
+ if (be_to_host16(hdr->length) > eap_payload_tlv_len) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: EAP packet overflow in "
|
|
|
+ "EAP Payload TLV");
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (hdr->code != EAP_CODE_REQUEST) {
|
|
|
+ wpa_printf(MSG_INFO, "EAP-FAST: Unexpected code=%d in "
|
|
|
+ "Phase 2 EAP header", hdr->code);
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (eap_fast_phase2_request(sm, data, ret, hdr, &resp)) {
|
|
|
+ wpa_printf(MSG_INFO, "EAP-FAST: Phase2 Request processing "
|
|
|
+ "failed");
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ return eap_fast_tlv_eap_payload(resp);
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_validate_crypto_binding(
|
|
|
+ struct eap_tlv_crypto_binding_tlv *_bind)
|
|
|
+{
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Crypto-Binding TLV: Version %d "
|
|
|
+ "Received Version %d SubType %d",
|
|
|
+ _bind->version, _bind->received_version, _bind->subtype);
|
|
|
+ wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: NONCE",
|
|
|
+ _bind->nonce, sizeof(_bind->nonce));
|
|
|
+ wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Compound MAC",
|
|
|
+ _bind->compound_mac, sizeof(_bind->compound_mac));
|
|
|
+
|
|
|
+ if (_bind->version != EAP_FAST_VERSION ||
|
|
|
+ _bind->received_version != EAP_FAST_VERSION ||
|
|
|
+ _bind->subtype != EAP_TLV_CRYPTO_BINDING_SUBTYPE_REQUEST) {
|
|
|
+ wpa_printf(MSG_INFO, "EAP-FAST: Invalid version/subtype in "
|
|
|
+ "Crypto-Binding TLV: Version %d "
|
|
|
+ "Received Version %d SubType %d",
|
|
|
+ _bind->version, _bind->received_version,
|
|
|
+ _bind->subtype);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static void eap_fast_write_crypto_binding(
|
|
|
+ struct eap_tlv_crypto_binding_tlv *rbind,
|
|
|
+ struct eap_tlv_crypto_binding_tlv *_bind, const u8 *cmk)
|
|
|
+{
|
|
|
+ rbind->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
|
|
|
+ EAP_TLV_CRYPTO_BINDING_TLV);
|
|
|
+ rbind->length = host_to_be16(sizeof(*rbind) -
|
|
|
+ sizeof(struct eap_tlv_hdr));
|
|
|
+ rbind->version = EAP_FAST_VERSION;
|
|
|
+ rbind->received_version = _bind->version;
|
|
|
+ rbind->subtype = EAP_TLV_CRYPTO_BINDING_SUBTYPE_RESPONSE;
|
|
|
+ os_memcpy(rbind->nonce, _bind->nonce, sizeof(_bind->nonce));
|
|
|
+ inc_byte_array(rbind->nonce, sizeof(rbind->nonce));
|
|
|
+ hmac_sha1(cmk, EAP_FAST_CMK_LEN, (u8 *) rbind, sizeof(*rbind),
|
|
|
+ rbind->compound_mac);
|
|
|
+
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Reply Crypto-Binding TLV: Version %d "
|
|
|
+ "Received Version %d SubType %d",
|
|
|
+ rbind->version, rbind->received_version, rbind->subtype);
|
|
|
+ wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: NONCE",
|
|
|
+ rbind->nonce, sizeof(rbind->nonce));
|
|
|
+ wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Compound MAC",
|
|
|
+ rbind->compound_mac, sizeof(rbind->compound_mac));
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_get_phase2_key(struct eap_sm *sm,
|
|
|
+ struct eap_fast_data *data,
|
|
|
+ u8 *isk, size_t isk_len)
|
|
|
+{
|
|
|
+ u8 *key;
|
|
|
+ size_t key_len;
|
|
|
+
|
|
|
+ os_memset(isk, 0, isk_len);
|
|
|
+
|
|
|
+ if (data->phase2_method == NULL || data->phase2_priv == NULL) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 method not "
|
|
|
+ "available");
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (data->phase2_method->isKeyAvailable == NULL ||
|
|
|
+ data->phase2_method->getKey == NULL)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ if (!data->phase2_method->isKeyAvailable(sm, data->phase2_priv) ||
|
|
|
+ (key = data->phase2_method->getKey(sm, data->phase2_priv,
|
|
|
+ &key_len)) == NULL) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Could not get key material "
|
|
|
+ "from Phase 2");
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (key_len > isk_len)
|
|
|
+ key_len = isk_len;
|
|
|
+ if (key_len == 32 &&
|
|
|
+ data->phase2_method->vendor == EAP_VENDOR_IETF &&
|
|
|
+ data->phase2_method->method == EAP_TYPE_MSCHAPV2) {
|
|
|
+ /*
|
|
|
+ * EAP-FAST uses reverse order for MS-MPPE keys when deriving
|
|
|
+ * MSK from EAP-MSCHAPv2. Swap the keys here to get the correct
|
|
|
+ * ISK for EAP-FAST cryptobinding.
|
|
|
+ */
|
|
|
+ os_memcpy(isk, key + 16, 16);
|
|
|
+ os_memcpy(isk + 16, key, 16);
|
|
|
+ } else
|
|
|
+ os_memcpy(isk, key, key_len);
|
|
|
+ os_free(key);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_get_cmk(struct eap_sm *sm, struct eap_fast_data *data,
|
|
|
+ u8 *cmk)
|
|
|
+{
|
|
|
+ u8 isk[32], imck[60];
|
|
|
+
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Determining CMK[%d] for Compound MIC "
|
|
|
+ "calculation", data->simck_idx + 1);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * RFC 4851, Section 5.2:
|
|
|
+ * IMCK[j] = T-PRF(S-IMCK[j-1], "Inner Methods Compound Keys",
|
|
|
+ * MSK[j], 60)
|
|
|
+ * S-IMCK[j] = first 40 octets of IMCK[j]
|
|
|
+ * CMK[j] = last 20 octets of IMCK[j]
|
|
|
+ */
|
|
|
+
|
|
|
+ if (eap_fast_get_phase2_key(sm, data, isk, sizeof(isk)) < 0)
|
|
|
+ return -1;
|
|
|
+ wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: ISK[j]", isk, sizeof(isk));
|
|
|
+ if (sha1_t_prf(data->simck, EAP_FAST_SIMCK_LEN,
|
|
|
+ "Inner Methods Compound Keys",
|
|
|
+ isk, sizeof(isk), imck, sizeof(imck)) < 0)
|
|
|
+ return -1;
|
|
|
+ data->simck_idx++;
|
|
|
+ os_memcpy(data->simck, imck, EAP_FAST_SIMCK_LEN);
|
|
|
+ wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: S-IMCK[j]",
|
|
|
+ data->simck, EAP_FAST_SIMCK_LEN);
|
|
|
+ os_memcpy(cmk, imck + EAP_FAST_SIMCK_LEN, EAP_FAST_CMK_LEN);
|
|
|
+ wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: CMK[j]",
|
|
|
+ cmk, EAP_FAST_CMK_LEN);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static u8 * eap_fast_write_pac_request(u8 *pos, u16 pac_type)
|
|
|
+{
|
|
|
+ struct eap_tlv_hdr *pac;
|
|
|
+ struct eap_tlv_request_action_tlv *act;
|
|
|
+ struct eap_tlv_pac_type_tlv *type;
|
|
|
+
|
|
|
+ act = (struct eap_tlv_request_action_tlv *) pos;
|
|
|
+ act->tlv_type = host_to_be16(EAP_TLV_REQUEST_ACTION_TLV);
|
|
|
+ act->length = host_to_be16(2);
|
|
|
+ act->action = host_to_be16(EAP_TLV_ACTION_PROCESS_TLV);
|
|
|
+
|
|
|
+ pac = (struct eap_tlv_hdr *) (act + 1);
|
|
|
+ pac->tlv_type = host_to_be16(EAP_TLV_PAC_TLV);
|
|
|
+ pac->length = host_to_be16(sizeof(*type));
|
|
|
+
|
|
|
+ type = (struct eap_tlv_pac_type_tlv *) (pac + 1);
|
|
|
+ type->tlv_type = host_to_be16(PAC_TYPE_PAC_TYPE);
|
|
|
+ type->length = host_to_be16(2);
|
|
|
+ type->pac_type = host_to_be16(pac_type);
|
|
|
+
|
|
|
+ return (u8 *) (type + 1);
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static struct wpabuf * eap_fast_process_crypto_binding(
|
|
|
+ struct eap_sm *sm, struct eap_fast_data *data,
|
|
|
+ struct eap_method_ret *ret,
|
|
|
+ struct eap_tlv_crypto_binding_tlv *_bind, size_t bind_len)
|
|
|
+{
|
|
|
+ struct wpabuf *resp;
|
|
|
+ u8 *pos;
|
|
|
+ u8 cmk[EAP_FAST_CMK_LEN], cmac[SHA1_MAC_LEN];
|
|
|
+ int res;
|
|
|
+ size_t len;
|
|
|
+
|
|
|
+ if (eap_fast_validate_crypto_binding(_bind) < 0)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ if (eap_fast_get_cmk(sm, data, cmk) < 0)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ /* Validate received Compound MAC */
|
|
|
+ os_memcpy(cmac, _bind->compound_mac, sizeof(cmac));
|
|
|
+ os_memset(_bind->compound_mac, 0, sizeof(cmac));
|
|
|
+ wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Crypto-Binding TLV for Compound "
|
|
|
+ "MAC calculation", (u8 *) _bind, bind_len);
|
|
|
+ hmac_sha1(cmk, EAP_FAST_CMK_LEN, (u8 *) _bind, bind_len,
|
|
|
+ _bind->compound_mac);
|
|
|
+ res = os_memcmp_const(cmac, _bind->compound_mac, sizeof(cmac));
|
|
|
+ wpa_hexdump(MSG_DEBUG, "EAP-FAST: Received Compound MAC",
|
|
|
+ cmac, sizeof(cmac));
|
|
|
+ wpa_hexdump(MSG_DEBUG, "EAP-FAST: Calculated Compound MAC",
|
|
|
+ _bind->compound_mac, sizeof(cmac));
|
|
|
+ if (res != 0) {
|
|
|
+ wpa_printf(MSG_INFO, "EAP-FAST: Compound MAC did not match");
|
|
|
+ os_memcpy(_bind->compound_mac, cmac, sizeof(cmac));
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Compound MAC was valid, so authentication succeeded. Reply with
|
|
|
+ * crypto binding to allow server to complete authentication.
|
|
|
+ */
|
|
|
+
|
|
|
+ len = sizeof(struct eap_tlv_crypto_binding_tlv);
|
|
|
+ resp = wpabuf_alloc(len);
|
|
|
+ if (resp == NULL)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ if (!data->anon_provisioning && data->phase2_success &&
|
|
|
+ eap_fast_derive_msk(data) < 0) {
|
|
|
+ wpa_printf(MSG_INFO, "EAP-FAST: Failed to generate MSK");
|
|
|
+ ret->methodState = METHOD_DONE;
|
|
|
+ ret->decision = DECISION_FAIL;
|
|
|
+ data->phase2_success = 0;
|
|
|
+ wpabuf_free(resp);
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!data->anon_provisioning && data->phase2_success) {
|
|
|
+ os_free(data->session_id);
|
|
|
+ data->session_id = eap_peer_tls_derive_session_id(
|
|
|
+ sm, &data->ssl, EAP_TYPE_FAST, &data->id_len);
|
|
|
+ if (data->session_id) {
|
|
|
+ wpa_hexdump(MSG_DEBUG, "EAP-FAST: Derived Session-Id",
|
|
|
+ data->session_id, data->id_len);
|
|
|
+ } else {
|
|
|
+ wpa_printf(MSG_ERROR, "EAP-FAST: Failed to derive "
|
|
|
+ "Session-Id");
|
|
|
+ wpabuf_free(resp);
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ pos = wpabuf_put(resp, sizeof(struct eap_tlv_crypto_binding_tlv));
|
|
|
+ eap_fast_write_crypto_binding((struct eap_tlv_crypto_binding_tlv *)
|
|
|
+ pos, _bind, cmk);
|
|
|
+
|
|
|
+ return resp;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static void eap_fast_parse_pac_tlv(struct eap_fast_pac *entry, int type,
|
|
|
+ u8 *pos, size_t len, int *pac_key_found)
|
|
|
+{
|
|
|
+ switch (type & 0x7fff) {
|
|
|
+ case PAC_TYPE_PAC_KEY:
|
|
|
+ wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: PAC-Key", pos, len);
|
|
|
+ if (len != EAP_FAST_PAC_KEY_LEN) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Invalid PAC-Key "
|
|
|
+ "length %lu", (unsigned long) len);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ *pac_key_found = 1;
|
|
|
+ os_memcpy(entry->pac_key, pos, len);
|
|
|
+ break;
|
|
|
+ case PAC_TYPE_PAC_OPAQUE:
|
|
|
+ wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Opaque", pos, len);
|
|
|
+ entry->pac_opaque = pos;
|
|
|
+ entry->pac_opaque_len = len;
|
|
|
+ break;
|
|
|
+ case PAC_TYPE_PAC_INFO:
|
|
|
+ wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Info", pos, len);
|
|
|
+ entry->pac_info = pos;
|
|
|
+ entry->pac_info_len = len;
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Ignored unknown PAC type %d",
|
|
|
+ type);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_process_pac_tlv(struct eap_fast_pac *entry,
|
|
|
+ u8 *pac, size_t pac_len)
|
|
|
+{
|
|
|
+ struct pac_tlv_hdr *hdr;
|
|
|
+ u8 *pos;
|
|
|
+ size_t left, len;
|
|
|
+ int type, pac_key_found = 0;
|
|
|
+
|
|
|
+ pos = pac;
|
|
|
+ left = pac_len;
|
|
|
+
|
|
|
+ while (left > sizeof(*hdr)) {
|
|
|
+ hdr = (struct pac_tlv_hdr *) pos;
|
|
|
+ type = be_to_host16(hdr->type);
|
|
|
+ len = be_to_host16(hdr->len);
|
|
|
+ pos += sizeof(*hdr);
|
|
|
+ left -= sizeof(*hdr);
|
|
|
+ if (len > left) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV overrun "
|
|
|
+ "(type=%d len=%lu left=%lu)",
|
|
|
+ type, (unsigned long) len,
|
|
|
+ (unsigned long) left);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ eap_fast_parse_pac_tlv(entry, type, pos, len, &pac_key_found);
|
|
|
+
|
|
|
+ pos += len;
|
|
|
+ left -= len;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!pac_key_found || !entry->pac_opaque || !entry->pac_info) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV does not include "
|
|
|
+ "all the required fields");
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_parse_pac_info(struct eap_fast_pac *entry, int type,
|
|
|
+ u8 *pos, size_t len)
|
|
|
+{
|
|
|
+ u16 pac_type;
|
|
|
+
|
|
|
+ switch (type & 0x7fff) {
|
|
|
+ case PAC_TYPE_CRED_LIFETIME:
|
|
|
+ if (len != 4) {
|
|
|
+ wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Info - "
|
|
|
+ "Invalid CRED_LIFETIME length - ignored",
|
|
|
+ pos, len);
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case PAC_TYPE_A_ID:
|
|
|
+ wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - A-ID",
|
|
|
+ pos, len);
|
|
|
+ entry->a_id = pos;
|
|
|
+ entry->a_id_len = len;
|
|
|
+ break;
|
|
|
+ case PAC_TYPE_I_ID:
|
|
|
+ wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - I-ID",
|
|
|
+ pos, len);
|
|
|
+ entry->i_id = pos;
|
|
|
+ entry->i_id_len = len;
|
|
|
+ break;
|
|
|
+ case PAC_TYPE_A_ID_INFO:
|
|
|
+ wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - A-ID-Info",
|
|
|
+ pos, len);
|
|
|
+ entry->a_id_info = pos;
|
|
|
+ entry->a_id_info_len = len;
|
|
|
+ break;
|
|
|
+ case PAC_TYPE_PAC_TYPE:
|
|
|
+ /* RFC 5422, Section 4.2.6 - PAC-Type TLV */
|
|
|
+ if (len != 2) {
|
|
|
+ wpa_printf(MSG_INFO, "EAP-FAST: Invalid PAC-Type "
|
|
|
+ "length %lu (expected 2)",
|
|
|
+ (unsigned long) len);
|
|
|
+ wpa_hexdump_ascii(MSG_DEBUG,
|
|
|
+ "EAP-FAST: PAC-Info - PAC-Type",
|
|
|
+ pos, len);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+ pac_type = WPA_GET_BE16(pos);
|
|
|
+ if (pac_type != PAC_TYPE_TUNNEL_PAC &&
|
|
|
+ pac_type != PAC_TYPE_USER_AUTHORIZATION &&
|
|
|
+ pac_type != PAC_TYPE_MACHINE_AUTHENTICATION) {
|
|
|
+ wpa_printf(MSG_INFO, "EAP-FAST: Unsupported PAC Type "
|
|
|
+ "%d", pac_type);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info - PAC-Type %d",
|
|
|
+ pac_type);
|
|
|
+ entry->pac_type = pac_type;
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Ignored unknown PAC-Info "
|
|
|
+ "type %d", type);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_process_pac_info(struct eap_fast_pac *entry)
|
|
|
+{
|
|
|
+ struct pac_tlv_hdr *hdr;
|
|
|
+ u8 *pos;
|
|
|
+ size_t left, len;
|
|
|
+ int type;
|
|
|
+
|
|
|
+ /* RFC 5422, Section 4.2.4 */
|
|
|
+
|
|
|
+ /* PAC-Type defaults to Tunnel PAC (Type 1) */
|
|
|
+ entry->pac_type = PAC_TYPE_TUNNEL_PAC;
|
|
|
+
|
|
|
+ pos = entry->pac_info;
|
|
|
+ left = entry->pac_info_len;
|
|
|
+ while (left > sizeof(*hdr)) {
|
|
|
+ hdr = (struct pac_tlv_hdr *) pos;
|
|
|
+ type = be_to_host16(hdr->type);
|
|
|
+ len = be_to_host16(hdr->len);
|
|
|
+ pos += sizeof(*hdr);
|
|
|
+ left -= sizeof(*hdr);
|
|
|
+ if (len > left) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info overrun "
|
|
|
+ "(type=%d len=%lu left=%lu)",
|
|
|
+ type, (unsigned long) len,
|
|
|
+ (unsigned long) left);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (eap_fast_parse_pac_info(entry, type, pos, len) < 0)
|
|
|
+ return -1;
|
|
|
+
|
|
|
+ pos += len;
|
|
|
+ left -= len;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (entry->a_id == NULL || entry->a_id_info == NULL) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info does not include "
|
|
|
+ "all the required fields");
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static struct wpabuf * eap_fast_process_pac(struct eap_sm *sm,
|
|
|
+ struct eap_fast_data *data,
|
|
|
+ struct eap_method_ret *ret,
|
|
|
+ u8 *pac, size_t pac_len)
|
|
|
+{
|
|
|
+ struct eap_peer_config *config = eap_get_config(sm);
|
|
|
+ struct eap_fast_pac entry;
|
|
|
+
|
|
|
+ os_memset(&entry, 0, sizeof(entry));
|
|
|
+ if (eap_fast_process_pac_tlv(&entry, pac, pac_len) ||
|
|
|
+ eap_fast_process_pac_info(&entry))
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ eap_fast_add_pac(&data->pac, &data->current_pac, &entry);
|
|
|
+ eap_fast_pac_list_truncate(data->pac, data->max_pac_list_len);
|
|
|
+ if (data->use_pac_binary_format)
|
|
|
+ eap_fast_save_pac_bin(sm, data->pac, config->pac_file);
|
|
|
+ else
|
|
|
+ eap_fast_save_pac(sm, data->pac, config->pac_file);
|
|
|
+
|
|
|
+ if (data->provisioning) {
|
|
|
+ if (data->anon_provisioning) {
|
|
|
+ /*
|
|
|
+ * Unauthenticated provisioning does not provide keying
|
|
|
+ * material and must end with an EAP-Failure.
|
|
|
+ * Authentication will be done separately after this.
|
|
|
+ */
|
|
|
+ data->success = 0;
|
|
|
+ ret->decision = DECISION_FAIL;
|
|
|
+ } else {
|
|
|
+ /*
|
|
|
+ * Server may or may not allow authenticated
|
|
|
+ * provisioning also for key generation.
|
|
|
+ */
|
|
|
+ ret->decision = DECISION_COND_SUCC;
|
|
|
+ }
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Send PAC-Acknowledgement TLV "
|
|
|
+ "- Provisioning completed successfully");
|
|
|
+ sm->expected_failure = 1;
|
|
|
+ } else {
|
|
|
+ /*
|
|
|
+ * This is PAC refreshing, i.e., normal authentication that is
|
|
|
+ * expected to be completed with an EAP-Success. However,
|
|
|
+ * RFC 5422, Section 3.5 allows EAP-Failure to be sent even
|
|
|
+ * after protected success exchange in case of EAP-Fast
|
|
|
+ * provisioning, so we better use DECISION_COND_SUCC here
|
|
|
+ * instead of DECISION_UNCOND_SUCC.
|
|
|
+ */
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Send PAC-Acknowledgement TLV "
|
|
|
+ "- PAC refreshing completed successfully");
|
|
|
+ ret->decision = DECISION_COND_SUCC;
|
|
|
+ }
|
|
|
+ ret->methodState = METHOD_DONE;
|
|
|
+ return eap_fast_tlv_pac_ack();
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_parse_decrypted(struct wpabuf *decrypted,
|
|
|
+ struct eap_fast_tlv_parse *tlv,
|
|
|
+ struct wpabuf **resp)
|
|
|
+{
|
|
|
+ int mandatory, tlv_type, res;
|
|
|
+ size_t len;
|
|
|
+ u8 *pos, *end;
|
|
|
+
|
|
|
+ os_memset(tlv, 0, sizeof(*tlv));
|
|
|
+
|
|
|
+ /* Parse TLVs from the decrypted Phase 2 data */
|
|
|
+ pos = wpabuf_mhead(decrypted);
|
|
|
+ end = pos + wpabuf_len(decrypted);
|
|
|
+ while (end - pos > 4) {
|
|
|
+ mandatory = pos[0] & 0x80;
|
|
|
+ tlv_type = WPA_GET_BE16(pos) & 0x3fff;
|
|
|
+ pos += 2;
|
|
|
+ len = WPA_GET_BE16(pos);
|
|
|
+ pos += 2;
|
|
|
+ if (len > (size_t) (end - pos)) {
|
|
|
+ wpa_printf(MSG_INFO, "EAP-FAST: TLV overflow");
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Received Phase 2: "
|
|
|
+ "TLV type %d length %u%s",
|
|
|
+ tlv_type, (unsigned int) len,
|
|
|
+ mandatory ? " (mandatory)" : "");
|
|
|
+
|
|
|
+ res = eap_fast_parse_tlv(tlv, tlv_type, pos, len);
|
|
|
+ if (res == -2)
|
|
|
+ break;
|
|
|
+ if (res < 0) {
|
|
|
+ if (mandatory) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Nak unknown "
|
|
|
+ "mandatory TLV type %d", tlv_type);
|
|
|
+ *resp = eap_fast_tlv_nak(0, tlv_type);
|
|
|
+ break;
|
|
|
+ } else {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: ignored "
|
|
|
+ "unknown optional TLV type %d",
|
|
|
+ tlv_type);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ pos += len;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_encrypt_response(struct eap_sm *sm,
|
|
|
+ struct eap_fast_data *data,
|
|
|
+ struct wpabuf *resp,
|
|
|
+ u8 identifier, struct wpabuf **out_data)
|
|
|
+{
|
|
|
+ if (resp == NULL)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ wpa_hexdump_buf(MSG_DEBUG, "EAP-FAST: Encrypting Phase 2 data",
|
|
|
+ resp);
|
|
|
+ if (eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_FAST,
|
|
|
+ data->fast_version, identifier,
|
|
|
+ resp, out_data)) {
|
|
|
+ wpa_printf(MSG_INFO, "EAP-FAST: Failed to encrypt a Phase 2 "
|
|
|
+ "frame");
|
|
|
+ }
|
|
|
+ wpabuf_free(resp);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static struct wpabuf * eap_fast_pac_request(void)
|
|
|
+{
|
|
|
+ struct wpabuf *tmp;
|
|
|
+ u8 *pos, *pos2;
|
|
|
+
|
|
|
+ tmp = wpabuf_alloc(sizeof(struct eap_tlv_hdr) +
|
|
|
+ sizeof(struct eap_tlv_request_action_tlv) +
|
|
|
+ sizeof(struct eap_tlv_pac_type_tlv));
|
|
|
+ if (tmp == NULL)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ pos = wpabuf_put(tmp, 0);
|
|
|
+ pos2 = eap_fast_write_pac_request(pos, PAC_TYPE_TUNNEL_PAC);
|
|
|
+ wpabuf_put(tmp, pos2 - pos);
|
|
|
+ return tmp;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_process_decrypted(struct eap_sm *sm,
|
|
|
+ struct eap_fast_data *data,
|
|
|
+ struct eap_method_ret *ret,
|
|
|
+ u8 identifier,
|
|
|
+ struct wpabuf *decrypted,
|
|
|
+ struct wpabuf **out_data)
|
|
|
+{
|
|
|
+ struct wpabuf *resp = NULL, *tmp;
|
|
|
+ struct eap_fast_tlv_parse tlv;
|
|
|
+ int failed = 0;
|
|
|
+
|
|
|
+ if (eap_fast_parse_decrypted(decrypted, &tlv, &resp) < 0)
|
|
|
+ return 0;
|
|
|
+ if (resp)
|
|
|
+ return eap_fast_encrypt_response(sm, data, resp,
|
|
|
+ identifier, out_data);
|
|
|
+
|
|
|
+ if (tlv.result == EAP_TLV_RESULT_FAILURE) {
|
|
|
+ resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0);
|
|
|
+ return eap_fast_encrypt_response(sm, data, resp,
|
|
|
+ identifier, out_data);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (tlv.iresult == EAP_TLV_RESULT_FAILURE) {
|
|
|
+ resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 1);
|
|
|
+ return eap_fast_encrypt_response(sm, data, resp,
|
|
|
+ identifier, out_data);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (tlv.crypto_binding) {
|
|
|
+ tmp = eap_fast_process_crypto_binding(sm, data, ret,
|
|
|
+ tlv.crypto_binding,
|
|
|
+ tlv.crypto_binding_len);
|
|
|
+ if (tmp == NULL)
|
|
|
+ failed = 1;
|
|
|
+ else
|
|
|
+ resp = wpabuf_concat(resp, tmp);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (tlv.iresult == EAP_TLV_RESULT_SUCCESS) {
|
|
|
+ tmp = eap_fast_tlv_result(failed ? EAP_TLV_RESULT_FAILURE :
|
|
|
+ EAP_TLV_RESULT_SUCCESS, 1);
|
|
|
+ resp = wpabuf_concat(resp, tmp);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (tlv.eap_payload_tlv) {
|
|
|
+ tmp = eap_fast_process_eap_payload_tlv(
|
|
|
+ sm, data, ret, tlv.eap_payload_tlv,
|
|
|
+ tlv.eap_payload_tlv_len);
|
|
|
+ resp = wpabuf_concat(resp, tmp);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (tlv.pac && tlv.result != EAP_TLV_RESULT_SUCCESS) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV without Result TLV "
|
|
|
+ "acknowledging success");
|
|
|
+ failed = 1;
|
|
|
+ } else if (tlv.pac && tlv.result == EAP_TLV_RESULT_SUCCESS) {
|
|
|
+ tmp = eap_fast_process_pac(sm, data, ret, tlv.pac,
|
|
|
+ tlv.pac_len);
|
|
|
+ resp = wpabuf_concat(resp, tmp);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (data->current_pac == NULL && data->provisioning &&
|
|
|
+ !data->anon_provisioning && !tlv.pac &&
|
|
|
+ (tlv.iresult == EAP_TLV_RESULT_SUCCESS ||
|
|
|
+ tlv.result == EAP_TLV_RESULT_SUCCESS)) {
|
|
|
+ /*
|
|
|
+ * Need to request Tunnel PAC when using authenticated
|
|
|
+ * provisioning.
|
|
|
+ */
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Request Tunnel PAC");
|
|
|
+ tmp = eap_fast_pac_request();
|
|
|
+ resp = wpabuf_concat(resp, tmp);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (tlv.result == EAP_TLV_RESULT_SUCCESS && !failed) {
|
|
|
+ tmp = eap_fast_tlv_result(EAP_TLV_RESULT_SUCCESS, 0);
|
|
|
+ resp = wpabuf_concat(tmp, resp);
|
|
|
+ } else if (failed) {
|
|
|
+ tmp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0);
|
|
|
+ resp = wpabuf_concat(tmp, resp);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (resp && tlv.result == EAP_TLV_RESULT_SUCCESS && !failed &&
|
|
|
+ tlv.crypto_binding && data->phase2_success) {
|
|
|
+ if (data->anon_provisioning) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Unauthenticated "
|
|
|
+ "provisioning completed successfully.");
|
|
|
+ ret->methodState = METHOD_DONE;
|
|
|
+ ret->decision = DECISION_FAIL;
|
|
|
+ sm->expected_failure = 1;
|
|
|
+ } else {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Authentication "
|
|
|
+ "completed successfully.");
|
|
|
+ if (data->provisioning)
|
|
|
+ ret->methodState = METHOD_MAY_CONT;
|
|
|
+ else
|
|
|
+ ret->methodState = METHOD_DONE;
|
|
|
+ ret->decision = DECISION_UNCOND_SUCC;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (resp == NULL) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: No recognized TLVs - send "
|
|
|
+ "empty response packet");
|
|
|
+ resp = wpabuf_alloc(1);
|
|
|
+ }
|
|
|
+
|
|
|
+ return eap_fast_encrypt_response(sm, data, resp, identifier,
|
|
|
+ out_data);
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_decrypt(struct eap_sm *sm, struct eap_fast_data *data,
|
|
|
+ struct eap_method_ret *ret, u8 identifier,
|
|
|
+ const struct wpabuf *in_data,
|
|
|
+ struct wpabuf **out_data)
|
|
|
+{
|
|
|
+ struct wpabuf *in_decrypted;
|
|
|
+ int res;
|
|
|
+
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Received %lu bytes encrypted data for"
|
|
|
+ " Phase 2", (unsigned long) wpabuf_len(in_data));
|
|
|
+
|
|
|
+ if (data->pending_phase2_req) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: 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;
|
|
|
+ goto continue_req;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (wpabuf_len(in_data) == 0) {
|
|
|
+ /* Received TLS ACK - requesting more fragments */
|
|
|
+ return eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_FAST,
|
|
|
+ data->fast_version,
|
|
|
+ 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_MSGDUMP, "EAP-FAST: Decrypted Phase 2 TLV(s)",
|
|
|
+ in_decrypted);
|
|
|
+
|
|
|
+ if (wpabuf_len(in_decrypted) < 4) {
|
|
|
+ wpa_printf(MSG_INFO, "EAP-FAST: Too short Phase 2 "
|
|
|
+ "TLV frame (len=%lu)",
|
|
|
+ (unsigned long) wpabuf_len(in_decrypted));
|
|
|
+ wpabuf_free(in_decrypted);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ res = eap_fast_process_decrypted(sm, data, ret, identifier,
|
|
|
+ in_decrypted, out_data);
|
|
|
+
|
|
|
+ wpabuf_free(in_decrypted);
|
|
|
+
|
|
|
+ return res;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static const u8 * eap_fast_get_a_id(const u8 *buf, size_t len, size_t *id_len)
|
|
|
+{
|
|
|
+ const u8 *a_id;
|
|
|
+ const struct pac_tlv_hdr *hdr;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Parse authority identity (A-ID) from the EAP-FAST/Start. This
|
|
|
+ * supports both raw A-ID and one inside an A-ID TLV.
|
|
|
+ */
|
|
|
+ a_id = buf;
|
|
|
+ *id_len = len;
|
|
|
+ if (len > sizeof(*hdr)) {
|
|
|
+ int tlen;
|
|
|
+ hdr = (const struct pac_tlv_hdr *) buf;
|
|
|
+ tlen = be_to_host16(hdr->len);
|
|
|
+ if (be_to_host16(hdr->type) == PAC_TYPE_A_ID &&
|
|
|
+ sizeof(*hdr) + tlen <= len) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: A-ID was in TLV "
|
|
|
+ "(Start)");
|
|
|
+ a_id = (const u8 *) (hdr + 1);
|
|
|
+ *id_len = tlen;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: A-ID", a_id, *id_len);
|
|
|
+
|
|
|
+ return a_id;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static void eap_fast_select_pac(struct eap_fast_data *data,
|
|
|
+ const u8 *a_id, size_t a_id_len)
|
|
|
+{
|
|
|
+ data->current_pac = eap_fast_get_pac(data->pac, a_id, a_id_len,
|
|
|
+ PAC_TYPE_TUNNEL_PAC);
|
|
|
+ if (data->current_pac == NULL) {
|
|
|
+ /*
|
|
|
+ * Tunnel PAC was not available for this A-ID. Try to use
|
|
|
+ * Machine Authentication PAC, if one is available.
|
|
|
+ */
|
|
|
+ data->current_pac = eap_fast_get_pac(
|
|
|
+ data->pac, a_id, a_id_len,
|
|
|
+ PAC_TYPE_MACHINE_AUTHENTICATION);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (data->current_pac) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: PAC found for this A-ID "
|
|
|
+ "(PAC-Type %d)", data->current_pac->pac_type);
|
|
|
+ wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-FAST: A-ID-Info",
|
|
|
+ data->current_pac->a_id_info,
|
|
|
+ data->current_pac->a_id_info_len);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_use_pac_opaque(struct eap_sm *sm,
|
|
|
+ struct eap_fast_data *data,
|
|
|
+ struct eap_fast_pac *pac)
|
|
|
+{
|
|
|
+ u8 *tlv;
|
|
|
+ size_t tlv_len, olen;
|
|
|
+ struct eap_tlv_hdr *ehdr;
|
|
|
+
|
|
|
+ olen = pac->pac_opaque_len;
|
|
|
+ tlv_len = sizeof(*ehdr) + olen;
|
|
|
+ tlv = os_malloc(tlv_len);
|
|
|
+ if (tlv) {
|
|
|
+ ehdr = (struct eap_tlv_hdr *) tlv;
|
|
|
+ ehdr->tlv_type = host_to_be16(PAC_TYPE_PAC_OPAQUE);
|
|
|
+ ehdr->length = host_to_be16(olen);
|
|
|
+ os_memcpy(ehdr + 1, pac->pac_opaque, olen);
|
|
|
+ }
|
|
|
+ if (tlv == NULL ||
|
|
|
+ tls_connection_client_hello_ext(sm->ssl_ctx, data->ssl.conn,
|
|
|
+ TLS_EXT_PAC_OPAQUE,
|
|
|
+ tlv, tlv_len) < 0) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to add PAC-Opaque TLS "
|
|
|
+ "extension");
|
|
|
+ os_free(tlv);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+ os_free(tlv);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_clear_pac_opaque_ext(struct eap_sm *sm,
|
|
|
+ struct eap_fast_data *data)
|
|
|
+{
|
|
|
+ if (tls_connection_client_hello_ext(sm->ssl_ctx, data->ssl.conn,
|
|
|
+ TLS_EXT_PAC_OPAQUE, NULL, 0) < 0) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to remove PAC-Opaque "
|
|
|
+ "TLS extension");
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_set_provisioning_ciphers(struct eap_sm *sm,
|
|
|
+ struct eap_fast_data *data)
|
|
|
+{
|
|
|
+ u8 ciphers[7];
|
|
|
+ int count = 0;
|
|
|
+
|
|
|
+ if (data->provisioning_allowed & EAP_FAST_PROV_UNAUTH) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Enabling unauthenticated "
|
|
|
+ "provisioning TLS cipher suites");
|
|
|
+ ciphers[count++] = TLS_CIPHER_ANON_DH_AES128_SHA;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (data->provisioning_allowed & EAP_FAST_PROV_AUTH) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Enabling authenticated "
|
|
|
+ "provisioning TLS cipher suites");
|
|
|
+ ciphers[count++] = TLS_CIPHER_RSA_DHE_AES256_SHA;
|
|
|
+ ciphers[count++] = TLS_CIPHER_RSA_DHE_AES128_SHA;
|
|
|
+ ciphers[count++] = TLS_CIPHER_AES256_SHA;
|
|
|
+ ciphers[count++] = TLS_CIPHER_AES128_SHA;
|
|
|
+ ciphers[count++] = TLS_CIPHER_RC4_SHA;
|
|
|
+ }
|
|
|
+
|
|
|
+ ciphers[count++] = TLS_CIPHER_NONE;
|
|
|
+
|
|
|
+ if (tls_connection_set_cipher_list(sm->ssl_ctx, data->ssl.conn,
|
|
|
+ ciphers)) {
|
|
|
+ wpa_printf(MSG_INFO, "EAP-FAST: Could not configure TLS "
|
|
|
+ "cipher suites for provisioning");
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_process_start(struct eap_sm *sm,
|
|
|
+ struct eap_fast_data *data, u8 flags,
|
|
|
+ const u8 *pos, size_t left)
|
|
|
+{
|
|
|
+ const u8 *a_id;
|
|
|
+ size_t a_id_len;
|
|
|
+
|
|
|
+ /* EAP-FAST Version negotiation (section 3.1) */
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Start (server ver=%d, own ver=%d)",
|
|
|
+ flags & EAP_TLS_VERSION_MASK, data->fast_version);
|
|
|
+ if ((flags & EAP_TLS_VERSION_MASK) < data->fast_version)
|
|
|
+ data->fast_version = flags & EAP_TLS_VERSION_MASK;
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Using FAST version %d",
|
|
|
+ data->fast_version);
|
|
|
+
|
|
|
+ a_id = eap_fast_get_a_id(pos, left, &a_id_len);
|
|
|
+ eap_fast_select_pac(data, a_id, a_id_len);
|
|
|
+
|
|
|
+ if (data->resuming && data->current_pac) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Trying to resume session - "
|
|
|
+ "do not add PAC-Opaque to TLS ClientHello");
|
|
|
+ if (eap_fast_clear_pac_opaque_ext(sm, data) < 0)
|
|
|
+ return -1;
|
|
|
+ } else if (data->current_pac) {
|
|
|
+ /*
|
|
|
+ * PAC found for the A-ID and we are not resuming an old
|
|
|
+ * session, so add PAC-Opaque extension to ClientHello.
|
|
|
+ */
|
|
|
+ if (eap_fast_use_pac_opaque(sm, data, data->current_pac) < 0)
|
|
|
+ return -1;
|
|
|
+ } else {
|
|
|
+ /* No PAC found, so we must provision one. */
|
|
|
+ if (!data->provisioning_allowed) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC found and "
|
|
|
+ "provisioning disabled");
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC found - "
|
|
|
+ "starting provisioning");
|
|
|
+ if (eap_fast_set_provisioning_ciphers(sm, data) < 0 ||
|
|
|
+ eap_fast_clear_pac_opaque_ext(sm, data) < 0)
|
|
|
+ return -1;
|
|
|
+ data->provisioning = 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static struct wpabuf * eap_fast_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_fast_data *data = priv;
|
|
|
+ struct wpabuf msg;
|
|
|
+
|
|
|
+ pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_FAST, ret,
|
|
|
+ reqData, &left, &flags);
|
|
|
+ if (pos == NULL)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ req = wpabuf_head(reqData);
|
|
|
+ id = req->identifier;
|
|
|
+
|
|
|
+ if (flags & EAP_TLS_FLAGS_START) {
|
|
|
+ if (eap_fast_process_start(sm, data, flags, pos, left) < 0)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ left = 0; /* A-ID is not used in further packet processing */
|
|
|
+ }
|
|
|
+
|
|
|
+ wpabuf_set(&msg, pos, left);
|
|
|
+
|
|
|
+ resp = NULL;
|
|
|
+ if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
|
|
|
+ !data->resuming) {
|
|
|
+ /* Process tunneled (encrypted) phase 2 data. */
|
|
|
+ res = eap_fast_decrypt(sm, data, ret, id, &msg, &resp);
|
|
|
+ if (res < 0) {
|
|
|
+ ret->methodState = METHOD_DONE;
|
|
|
+ ret->decision = DECISION_FAIL;
|
|
|
+ /*
|
|
|
+ * Ack possible Alert that may have caused failure in
|
|
|
+ * decryption.
|
|
|
+ */
|
|
|
+ res = 1;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ if (sm->waiting_ext_cert_check && data->pending_resp) {
|
|
|
+ struct eap_peer_config *config = eap_get_config(sm);
|
|
|
+
|
|
|
+ if (config->pending_ext_cert_check ==
|
|
|
+ EXT_CERT_CHECK_GOOD) {
|
|
|
+ wpa_printf(MSG_DEBUG,
|
|
|
+ "EAP-FAST: External certificate check succeeded - continue handshake");
|
|
|
+ resp = data->pending_resp;
|
|
|
+ data->pending_resp = NULL;
|
|
|
+ sm->waiting_ext_cert_check = 0;
|
|
|
+ return resp;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (config->pending_ext_cert_check ==
|
|
|
+ EXT_CERT_CHECK_BAD) {
|
|
|
+ wpa_printf(MSG_DEBUG,
|
|
|
+ "EAP-FAST: External certificate check failed - force authentication failure");
|
|
|
+ ret->methodState = METHOD_DONE;
|
|
|
+ ret->decision = DECISION_FAIL;
|
|
|
+ sm->waiting_ext_cert_check = 0;
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ wpa_printf(MSG_DEBUG,
|
|
|
+ "EAP-FAST: Continuing to wait external server certificate validation");
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Continue processing TLS handshake (phase 1). */
|
|
|
+ res = eap_peer_tls_process_helper(sm, &data->ssl,
|
|
|
+ EAP_TYPE_FAST,
|
|
|
+ data->fast_version, id, pos,
|
|
|
+ left, &resp);
|
|
|
+ if (res < 0) {
|
|
|
+ wpa_printf(MSG_DEBUG,
|
|
|
+ "EAP-FAST: TLS processing failed");
|
|
|
+ ret->methodState = METHOD_DONE;
|
|
|
+ ret->decision = DECISION_FAIL;
|
|
|
+ return resp;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (sm->waiting_ext_cert_check) {
|
|
|
+ wpa_printf(MSG_DEBUG,
|
|
|
+ "EAP-FAST: Waiting external server certificate validation");
|
|
|
+ wpabuf_free(data->pending_resp);
|
|
|
+ data->pending_resp = resp;
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
|
|
|
+ char cipher[80];
|
|
|
+ wpa_printf(MSG_DEBUG,
|
|
|
+ "EAP-FAST: TLS done, proceed to Phase 2");
|
|
|
+ if (data->provisioning &&
|
|
|
+ (!(data->provisioning_allowed &
|
|
|
+ EAP_FAST_PROV_AUTH) ||
|
|
|
+ tls_get_cipher(sm->ssl_ctx, data->ssl.conn,
|
|
|
+ cipher, sizeof(cipher)) < 0 ||
|
|
|
+ os_strstr(cipher, "ADH-") ||
|
|
|
+ os_strstr(cipher, "anon"))) {
|
|
|
+ wpa_printf(MSG_DEBUG, "EAP-FAST: Using "
|
|
|
+ "anonymous (unauthenticated) "
|
|
|
+ "provisioning");
|
|
|
+ data->anon_provisioning = 1;
|
|
|
+ } else {
|
|
|
+ data->anon_provisioning = 0;
|
|
|
+ }
|
|
|
+ data->resuming = 0;
|
|
|
+ if (eap_fast_derive_keys(sm, data) < 0) {
|
|
|
+ wpa_printf(MSG_DEBUG,
|
|
|
+ "EAP-FAST: Could not derive keys");
|
|
|
+ ret->methodState = METHOD_DONE;
|
|
|
+ ret->decision = DECISION_FAIL;
|
|
|
+ wpabuf_free(resp);
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (res == 2) {
|
|
|
+ /*
|
|
|
+ * Application data included in the handshake message.
|
|
|
+ */
|
|
|
+ wpabuf_free(data->pending_phase2_req);
|
|
|
+ data->pending_phase2_req = resp;
|
|
|
+ resp = NULL;
|
|
|
+ res = eap_fast_decrypt(sm, data, ret, id, &msg, &resp);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (res == 1) {
|
|
|
+ wpabuf_free(resp);
|
|
|
+ return eap_peer_tls_build_ack(id, EAP_TYPE_FAST,
|
|
|
+ data->fast_version);
|
|
|
+ }
|
|
|
+
|
|
|
+ return resp;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+#if 0 /* FIX */
|
|
|
+static Boolean eap_fast_has_reauth_data(struct eap_sm *sm, void *priv)
|
|
|
+{
|
|
|
+ struct eap_fast_data *data = priv;
|
|
|
+ return tls_connection_established(sm->ssl_ctx, data->ssl.conn);
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static void eap_fast_deinit_for_reauth(struct eap_sm *sm, void *priv)
|
|
|
+{
|
|
|
+ struct eap_fast_data *data = priv;
|
|
|
+
|
|
|
+ if (data->phase2_priv && data->phase2_method &&
|
|
|
+ data->phase2_method->deinit_for_reauth)
|
|
|
+ data->phase2_method->deinit_for_reauth(sm, data->phase2_priv);
|
|
|
+ os_free(data->key_block_p);
|
|
|
+ data->key_block_p = NULL;
|
|
|
+ wpabuf_free(data->pending_phase2_req);
|
|
|
+ data->pending_phase2_req = NULL;
|
|
|
+ wpabuf_free(data->pending_resp);
|
|
|
+ data->pending_resp = NULL;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static void * eap_fast_init_for_reauth(struct eap_sm *sm, void *priv)
|
|
|
+{
|
|
|
+ struct eap_fast_data *data = priv;
|
|
|
+ if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
|
|
|
+ os_free(data);
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+ os_memset(data->key_data, 0, EAP_FAST_KEY_LEN);
|
|
|
+ os_memset(data->emsk, 0, EAP_EMSK_LEN);
|
|
|
+ os_free(data->session_id);
|
|
|
+ data->session_id = 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->resuming = 1;
|
|
|
+ data->provisioning = 0;
|
|
|
+ data->anon_provisioning = 0;
|
|
|
+ data->simck_idx = 0;
|
|
|
+ return priv;
|
|
|
+}
|
|
|
+#endif
|
|
|
+
|
|
|
+
|
|
|
+static int eap_fast_get_status(struct eap_sm *sm, void *priv, char *buf,
|
|
|
+ size_t buflen, int verbose)
|
|
|
+{
|
|
|
+ struct eap_fast_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-FAST Phase2 method=%s\n",
|
|
|
+ data->phase2_method->name);
|
|
|
+ if (os_snprintf_error(buflen - len, ret))
|
|
|
+ return len;
|
|
|
+ len += ret;
|
|
|
+ }
|
|
|
+ return len;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static bool eap_fast_isKeyAvailable(struct eap_sm *sm, void *priv)
|
|
|
+{
|
|
|
+ struct eap_fast_data *data = priv;
|
|
|
+ return data->success;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static u8 * eap_fast_getKey(struct eap_sm *sm, void *priv, size_t *len)
|
|
|
+{
|
|
|
+ struct eap_fast_data *data = priv;
|
|
|
+ u8 *key;
|
|
|
+
|
|
|
+ if (!data->success)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ key = os_memdup(data->key_data, EAP_FAST_KEY_LEN);
|
|
|
+ if (key == NULL)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ *len = EAP_FAST_KEY_LEN;
|
|
|
+
|
|
|
+ return key;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static u8 * eap_fast_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
|
|
|
+{
|
|
|
+ struct eap_fast_data *data = priv;
|
|
|
+ u8 *id;
|
|
|
+
|
|
|
+ if (!data->success || !data->session_id)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ id = os_memdup(data->session_id, data->id_len);
|
|
|
+ if (id == NULL)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ *len = data->id_len;
|
|
|
+
|
|
|
+ return id;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static u8 * eap_fast_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
|
|
|
+{
|
|
|
+ struct eap_fast_data *data = priv;
|
|
|
+ u8 *key;
|
|
|
+
|
|
|
+ if (!data->success)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ key = os_memdup(data->emsk, EAP_EMSK_LEN);
|
|
|
+ if (key == NULL)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ *len = EAP_EMSK_LEN;
|
|
|
+
|
|
|
+ return key;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+int eap_peer_fast_register(void)
|
|
|
+{
|
|
|
+ struct eap_method *eap;
|
|
|
+
|
|
|
+ eap = eap_peer_method_alloc(EAP_VENDOR_IETF, EAP_TYPE_FAST, "FAST");
|
|
|
+ if (eap == NULL)
|
|
|
+ return -1;
|
|
|
+
|
|
|
+ eap->init = eap_fast_init;
|
|
|
+ eap->deinit = eap_fast_deinit;
|
|
|
+ eap->process = eap_fast_process;
|
|
|
+ eap->isKeyAvailable = eap_fast_isKeyAvailable;
|
|
|
+ eap->getKey = eap_fast_getKey;
|
|
|
+ eap->getSessionId = eap_fast_get_session_id;
|
|
|
+ eap->get_status = eap_fast_get_status;
|
|
|
+#if 0
|
|
|
+ eap->has_reauth_data = eap_fast_has_reauth_data;
|
|
|
+ eap->deinit_for_reauth = eap_fast_deinit_for_reauth;
|
|
|
+ eap->init_for_reauth = eap_fast_init_for_reauth;
|
|
|
+#endif
|
|
|
+ eap->get_emsk = eap_fast_get_emsk;
|
|
|
+
|
|
|
+ return eap_peer_method_register(eap);
|
|
|
+}
|
Jiang Jiang Jian