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* EAP peer: EAP-TLS/PEAP/TTLS/FAST common functions
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* Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
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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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* Alternatively, this software may be distributed under the terms of BSD
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* See README and COPYING for more details.
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#include "eap_tls_common.h"
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#include "config_ssid.h"
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static int eap_tls_check_blob(struct eap_sm *sm, const char **name,
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const u8 **data, size_t *data_len)
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const struct wpa_config_blob *blob;
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if (*name == NULL || os_strncmp(*name, "blob://", 7) != 0)
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blob = eap_get_config_blob(sm, *name + 7);
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wpa_printf(MSG_ERROR, "%s: Named configuration blob '%s' not "
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"found", __func__, *name + 7);
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*data_len = blob->len;
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static void eap_tls_params_from_conf1(struct tls_connection_params *params,
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struct wpa_ssid *config)
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params->ca_cert = (char *) config->ca_cert;
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params->ca_path = (char *) config->ca_path;
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params->client_cert = (char *) config->client_cert;
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params->private_key = (char *) config->private_key;
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params->private_key_passwd = (char *) config->private_key_passwd;
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params->dh_file = (char *) config->dh_file;
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params->subject_match = (char *) config->subject_match;
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params->altsubject_match = (char *) config->altsubject_match;
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params->engine_id = config->engine_id;
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params->pin = config->pin;
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params->key_id = config->key_id;
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static void eap_tls_params_from_conf2(struct tls_connection_params *params,
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struct wpa_ssid *config)
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params->ca_cert = (char *) config->ca_cert2;
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params->ca_path = (char *) config->ca_path2;
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params->client_cert = (char *) config->client_cert2;
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params->private_key = (char *) config->private_key2;
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params->private_key_passwd = (char *) config->private_key2_passwd;
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params->dh_file = (char *) config->dh_file2;
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params->subject_match = (char *) config->subject_match2;
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params->altsubject_match = (char *) config->altsubject_match2;
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static int eap_tls_params_from_conf(struct eap_sm *sm,
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struct eap_ssl_data *data,
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struct tls_connection_params *params,
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struct wpa_ssid *config, int phase2)
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os_memset(params, 0, sizeof(*params));
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params->engine = config->engine;
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eap_tls_params_from_conf2(params, config);
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eap_tls_params_from_conf1(params, config);
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params->tls_ia = data->tls_ia;
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* Use blob data, if available. Otherwise, leave reference to external
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if (eap_tls_check_blob(sm, ¶ms->ca_cert, ¶ms->ca_cert_blob,
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¶ms->ca_cert_blob_len) ||
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eap_tls_check_blob(sm, ¶ms->client_cert,
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¶ms->client_cert_blob,
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¶ms->client_cert_blob_len) ||
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eap_tls_check_blob(sm, ¶ms->private_key,
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¶ms->private_key_blob,
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¶ms->private_key_blob_len) ||
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eap_tls_check_blob(sm, ¶ms->dh_file, ¶ms->dh_blob,
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¶ms->dh_blob_len)) {
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wpa_printf(MSG_INFO, "SSL: Failed to get configuration blobs");
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static int eap_tls_init_connection(struct eap_sm *sm,
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struct eap_ssl_data *data,
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struct wpa_ssid *config,
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struct tls_connection_params *params)
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data->conn = tls_connection_init(sm->ssl_ctx);
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if (data->conn == NULL) {
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wpa_printf(MSG_INFO, "SSL: Failed to initialize new TLS "
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res = tls_connection_set_params(sm->ssl_ctx, data->conn, params);
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if (res == TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED) {
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* At this point with the pkcs11 engine the PIN might be wrong.
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* We reset the PIN in the configuration to be sure to not use
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* it again and the calling function must request a new one.
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os_free(config->pin);
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} else if (res == TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED) {
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wpa_printf(MSG_INFO, "TLS: Failed to load private key");
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* We do not know exactly but maybe the PIN was wrong,
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* so ask for a new one.
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os_free(config->pin);
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eap_sm_request_pin(sm);
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wpa_printf(MSG_INFO, "TLS: Failed to set TLS connection "
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* eap_peer_tls_ssl_init - Initialize shared TLS functionality
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* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
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* @data: Data for TLS processing
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* @config: Pointer to the network configuration
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* Returns: 0 on success, -1 on failure
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* This function is used to initialize shared TLS functionality for EAP-TLS,
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* EAP-PEAP, EAP-TTLS, and EAP-FAST.
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int eap_peer_tls_ssl_init(struct eap_sm *sm, struct eap_ssl_data *data,
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struct wpa_ssid *config)
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struct tls_connection_params params;
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data->phase2 = sm->init_phase2;
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if (eap_tls_params_from_conf(sm, data, ¶ms, config, data->phase2) <
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if (eap_tls_init_connection(sm, data, config, ¶ms) < 0)
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data->tls_out_limit = config->fragment_size;
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/* Limit the fragment size in the inner TLS authentication
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* since the outer authentication with EAP-PEAP does not yet
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* support fragmentation */
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if (data->tls_out_limit > 100)
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data->tls_out_limit -= 100;
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if (config->phase1 &&
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os_strstr(config->phase1, "include_tls_length=1")) {
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wpa_printf(MSG_DEBUG, "TLS: Include TLS Message Length in "
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"unfragmented packets");
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data->include_tls_length = 1;
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* eap_peer_tls_ssl_deinit - Deinitialize shared TLS functionality
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* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
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* @data: Data for TLS processing
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* This function deinitializes shared TLS functionality that was initialized
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* with eap_peer_tls_ssl_init().
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void eap_peer_tls_ssl_deinit(struct eap_sm *sm, struct eap_ssl_data *data)
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tls_connection_deinit(sm->ssl_ctx, data->conn);
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eap_peer_tls_reset_input(data);
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eap_peer_tls_reset_output(data);
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* eap_peer_tls_derive_key - Derive a key based on TLS session data
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* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
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* @data: Data for TLS processing
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* @label: Label string for deriving the keys, e.g., "client EAP encryption"
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* @len: Length of the key material to generate (usually 64 for MSK)
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* Returns: Pointer to allocated key on success or %NULL on failure
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* This function uses TLS-PRF to generate pseudo-random data based on the TLS
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* session data (client/server random and master key). Each key type may use a
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* different label to bind the key usage into the generated material.
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* The caller is responsible for freeing the returned buffer.
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u8 * eap_peer_tls_derive_key(struct eap_sm *sm, struct eap_ssl_data *data,
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const char *label, size_t len)
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struct tls_keys keys;
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u8 *rnd = NULL, *out;
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out = os_malloc(len);
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/* First, try to use TLS library function for PRF, if available. */
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if (tls_connection_prf(sm->ssl_ctx, data->conn, label, 0, out, len) ==
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* TLS library did not support key generation, so get the needed TLS
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* session parameters and use an internal implementation of TLS PRF to
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if (tls_connection_get_keys(sm->ssl_ctx, data->conn, &keys))
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if (keys.client_random == NULL || keys.server_random == NULL ||
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keys.master_key == NULL)
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rnd = os_malloc(keys.client_random_len + keys.server_random_len);
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os_memcpy(rnd, keys.client_random, keys.client_random_len);
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os_memcpy(rnd + keys.client_random_len, keys.server_random,
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keys.server_random_len);
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if (tls_prf(keys.master_key, keys.master_key_len,
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label, rnd, keys.client_random_len +
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keys.server_random_len, out, len))
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* eap_peer_tls_reassemble_fragment - Reassemble a received fragment
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* @data: Data for TLS processing
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* @in_data: Next incoming TLS segment
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* @in_len: Length of in_data
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* Returns: 0 on success, 1 if more data is needed for the full message, or
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static int eap_peer_tls_reassemble_fragment(struct eap_ssl_data *data,
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const u8 *in_data, size_t in_len)
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if (data->tls_in_len + in_len == 0) {
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/* No message data received?! */
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wpa_printf(MSG_WARNING, "SSL: Invalid reassembly state: "
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"tls_in_left=%lu tls_in_len=%lu in_len=%lu",
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(unsigned long) data->tls_in_left,
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(unsigned long) data->tls_in_len,
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(unsigned long) in_len);
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eap_peer_tls_reset_input(data);
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if (data->tls_in_len + in_len > 65536) {
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* Limit length to avoid rogue servers from causing large
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* memory allocations.
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wpa_printf(MSG_INFO, "SSL: Too long TLS fragment (size over "
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eap_peer_tls_reset_input(data);
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if (in_len > data->tls_in_left) {
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/* Sender is doing something odd - reject message */
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wpa_printf(MSG_INFO, "SSL: more data than TLS message length "
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eap_peer_tls_reset_input(data);
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buf = os_realloc(data->tls_in, data->tls_in_len + in_len);
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wpa_printf(MSG_INFO, "SSL: Could not allocate memory for TLS "
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eap_peer_tls_reset_input(data);
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os_memcpy(buf + data->tls_in_len, in_data, in_len);
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data->tls_in_len += in_len;
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data->tls_in_left -= in_len;
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if (data->tls_in_left > 0) {
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wpa_printf(MSG_DEBUG, "SSL: Need %lu bytes more input "
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"data", (unsigned long) data->tls_in_left);
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* eap_peer_tls_data_reassemble - Reassemble TLS data
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* @data: Data for TLS processing
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* @in_data: Next incoming TLS segment
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* @in_len: Length of in_data
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* @out_len: Variable for returning length of the reassembled message
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* @need_more_input: Variable for returning whether more input data is needed
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* to reassemble this TLS packet
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* Returns: Pointer to output data, %NULL on error or when more data is needed
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* for the full message (in which case, *need_more_input is also set to 1).
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* This function reassembles TLS fragments. Caller must not free the returned
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* data buffer since an internal pointer to it is maintained.
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const u8 * eap_peer_tls_data_reassemble(
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struct eap_ssl_data *data, const u8 *in_data, size_t in_len,
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size_t *out_len, int *need_more_input)
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*need_more_input = 0;
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if (data->tls_in_left > in_len || data->tls_in) {
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/* Message has fragments */
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int res = eap_peer_tls_reassemble_fragment(data, in_data,
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*need_more_input = 1;
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/* Message is now fully reassembled. */
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/* No fragments in this message, so just make a copy of it. */
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data->tls_in_left = 0;
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data->tls_in = os_malloc(in_len ? in_len : 1);
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if (data->tls_in == NULL)
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os_memcpy(data->tls_in, in_data, in_len);
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data->tls_in_len = in_len;
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*out_len = data->tls_in_len;
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* eap_tls_process_input - Process incoming TLS message
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* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
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* @data: Data for TLS processing
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* @in_data: Message received from the server
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* @in_len: Length of in_data
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* @out_data: Buffer for returning a pointer to application data (if available)
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* @out_len: Buffer for returning the length of the application data
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* Returns: 0 on success, 1 if more input data is needed, 2 if application data
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* is available, -1 on failure
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static int eap_tls_process_input(struct eap_sm *sm, struct eap_ssl_data *data,
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const u8 *in_data, size_t in_len,
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u8 **out_data, size_t *out_len)
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size_t appl_data_len;
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msg = eap_peer_tls_data_reassemble(data, in_data, in_len,
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&msg_len, &need_more_input);
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return need_more_input ? 1 : -1;
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/* Full TLS message reassembled - continue handshake processing */
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/* This should not happen.. */
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wpa_printf(MSG_INFO, "SSL: eap_tls_process_input - pending "
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"tls_out data even though tls_out_len = 0");
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os_free(data->tls_out);
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WPA_ASSERT(data->tls_out == NULL);
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data->tls_out = tls_connection_handshake(sm->ssl_ctx, data->conn,
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&appl_data, &appl_data_len);
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eap_peer_tls_reset_input(data);
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tls_connection_established(sm->ssl_ctx, data->conn) &&
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!tls_connection_get_failed(sm->ssl_ctx, data->conn)) {
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wpa_hexdump_key(MSG_MSGDUMP, "SSL: Application data",
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appl_data, appl_data_len);
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*out_data = appl_data;
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*out_len = appl_data_len;
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* eap_tls_process_output - Process outgoing TLS message
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* @data: Data for TLS processing
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* @eap_type: EAP type (EAP_TYPE_TLS, EAP_TYPE_PEAP, ...)
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* @peap_version: Version number for EAP-PEAP/TTLS
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* @id: EAP identifier for the response
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* @ret: Return value to use on success
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* @out_data: Buffer for returning the allocated output buffer
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* @out_len: Buffer for returning the length of the output buffer
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* Returns: ret (0 or 1) on success, -1 on failure
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static int eap_tls_process_output(struct eap_ssl_data *data, EapType eap_type,
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int peap_version, u8 id, int ret,
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u8 **out_data, size_t *out_len)
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int more_fragments, length_included;
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len = data->tls_out_len - data->tls_out_pos;
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wpa_printf(MSG_DEBUG, "SSL: %lu bytes left to be sent out (of total "
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(unsigned long) len, (unsigned long) data->tls_out_len);
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* Limit outgoing message to the configured maximum size. Fragment
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if (len > data->tls_out_limit) {
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len = data->tls_out_limit;
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wpa_printf(MSG_DEBUG, "SSL: sending %lu bytes, more fragments "
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"will follow", (unsigned long) len);
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length_included = data->tls_out_pos == 0 &&
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(data->tls_out_len > data->tls_out_limit ||
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data->include_tls_length);
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eap_msg_alloc(EAP_VENDOR_IETF, eap_type, out_len,
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1 + length_included * 4 + len, EAP_CODE_RESPONSE,
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if (*out_data == NULL)
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*flags = peap_version;
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*flags |= EAP_TLS_FLAGS_MORE_FRAGMENTS;
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if (length_included) {
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*flags |= EAP_TLS_FLAGS_LENGTH_INCLUDED;
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WPA_PUT_BE32(pos, data->tls_out_len);
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os_memcpy(pos, &data->tls_out[data->tls_out_pos], len);
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data->tls_out_pos += len;
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eap_peer_tls_reset_output(data);
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* eap_peer_tls_process_helper - Process TLS handshake message
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* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
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* @data: Data for TLS processing
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* @eap_type: EAP type (EAP_TYPE_TLS, EAP_TYPE_PEAP, ...)
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* @peap_version: Version number for EAP-PEAP/TTLS
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* @id: EAP identifier for the response
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* @in_data: Message received from the server
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* @in_len: Length of in_data
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* @out_data: Buffer for returning a pointer to the response message
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* @out_len: Buffer for returning the length of the response message
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* Returns: 0 on success, 1 if more input data is needed, 2 if application data
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* is available, or -1 on failure
535
* This function can be used to process TLS handshake messages. It reassembles
536
* the received fragments and uses a TLS library to process the messages. The
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* response data from the TLS library is fragmented to suitable output messages
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* that the caller can send out.
540
* out_data is used to return the response message if the return value of this
541
* function is 0, 2, or -1. In case of failure, the message is likely a TLS
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* alarm message. The caller is responsible for freeing the allocated buffer if
543
* *out_data is not %NULL.
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* This function is called for each received TLS message during the TLS
546
* handshake after eap_peer_tls_process_init() call and possible processing of
547
* TLS Flags field. Once the handshake has been completed, i.e., when
548
* tls_connection_established() returns 1, EAP method specific decrypting of
549
* the tunneled data is used.
551
int eap_peer_tls_process_helper(struct eap_sm *sm, struct eap_ssl_data *data,
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EapType eap_type, int peap_version,
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u8 id, const u8 *in_data, size_t in_len,
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u8 **out_data, size_t *out_len)
561
if (data->tls_out_len > 0 && in_len > 0) {
562
wpa_printf(MSG_DEBUG, "SSL: Received non-ACK when output "
563
"fragments are waiting to be sent out");
567
if (data->tls_out_len == 0) {
569
* No more data to send out - expect to receive more data from
572
int res = eap_tls_process_input(sm, data, in_data, in_len,
576
* Input processing failed (res = -1) or more data is
583
* The incoming message has been reassembled and processed. The
584
* response was allocated into data->tls_out buffer.
588
if (data->tls_out == NULL) {
590
* No outgoing fragments remaining from the previous message
591
* and no new message generated. This indicates an error in TLS
594
eap_peer_tls_reset_output(data);
598
if (tls_connection_get_failed(sm->ssl_ctx, data->conn)) {
599
/* TLS processing has failed - return error */
600
wpa_printf(MSG_DEBUG, "SSL: Failed - tls_out available to "
603
/* TODO: clean pin if engine used? */
606
if (data->tls_out_len == 0) {
608
* TLS negotiation should now be complete since all other cases
609
* needing more data should have been caught above based on
610
* the TLS Message Length field.
612
wpa_printf(MSG_DEBUG, "SSL: No data to be sent out");
613
os_free(data->tls_out);
614
data->tls_out = NULL;
618
/* Send the pending message (in fragments, if needed). */
619
return eap_tls_process_output(data, eap_type, peap_version, id, ret,
625
* eap_peer_tls_build_ack - Build a TLS ACK frame
626
* @data: Data for TLS processing
627
* @respDataLen: Buffer for returning the length of the response message
628
* @id: EAP identifier for the response
629
* @eap_type: EAP type (EAP_TYPE_TLS, EAP_TYPE_PEAP, ...)
630
* @peap_version: Version number for EAP-PEAP/TTLS
631
* Returns: Pointer to the allocated ACK frame or %NULL on failure
633
u8 * eap_peer_tls_build_ack(struct eap_ssl_data *data, size_t *respDataLen,
634
u8 id, EapType eap_type, int peap_version)
636
struct eap_hdr *resp;
639
resp = eap_msg_alloc(EAP_VENDOR_IETF, eap_type, respDataLen,
640
1, EAP_CODE_RESPONSE, id, &pos);
643
wpa_printf(MSG_DEBUG, "SSL: Building ACK (type=%d id=%d ver=%d)",
644
(int) eap_type, id, peap_version);
645
*pos = peap_version; /* Flags */
651
* eap_peer_tls_reauth_init - Re-initialize shared TLS for session resumption
652
* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
653
* @data: Data for TLS processing
654
* Returns: 0 on success, -1 on failure
656
int eap_peer_tls_reauth_init(struct eap_sm *sm, struct eap_ssl_data *data)
658
eap_peer_tls_reset_input(data);
659
eap_peer_tls_reset_output(data);
660
return tls_connection_shutdown(sm->ssl_ctx, data->conn);
665
* eap_peer_tls_status - Get TLS status
666
* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
667
* @data: Data for TLS processing
668
* @buf: Buffer for status information
669
* @buflen: Maximum buffer length
670
* @verbose: Whether to include verbose status information
671
* Returns: Number of bytes written to buf.
673
int eap_peer_tls_status(struct eap_sm *sm, struct eap_ssl_data *data,
674
char *buf, size_t buflen, int verbose)
679
if (tls_get_cipher(sm->ssl_ctx, data->conn, name, sizeof(name)) == 0) {
680
ret = os_snprintf(buf + len, buflen - len,
681
"EAP TLS cipher=%s\n", name);
682
if (ret < 0 || (size_t) ret >= buflen - len)
692
* eap_peer_tls_process_init - Initial validation/processing of EAP requests
693
* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
694
* @data: Data for TLS processing
695
* @eap_type: EAP type (EAP_TYPE_TLS, EAP_TYPE_PEAP, ...)
696
* @ret: Return values from EAP request validation and processing
697
* @reqData: EAP request to be processed (eapReqData)
698
* @reqDataLen: Length of the EAP request
699
* @len: Buffer for returning length of the remaining payload
700
* @flags: Buffer for returning TLS flags
701
* Returns: Buffer to payload after TLS flags and length or %NULL on failure
703
* This function validates the EAP header and processes the optional TLS
704
* Message Length field. If this is the first fragment of a TLS message, the
705
* TLS reassembly code is initialized to receive the indicated number of bytes.
707
* EAP-TLS, EAP-PEAP, EAP-TTLS, and EAP-FAST methods are expected to use this
708
* function as the first step in processing received messages. They will need
709
* to process the flags (apart from Message Length Included) that are returned
710
* through the flags pointer and the message payload that will be returned (and
711
* the length is returned through the len pointer). Return values (ret) are set
712
* for continuation of EAP method processing. The caller is responsible for
713
* setting these to indicate completion (either success or failure) based on
714
* the authentication result.
716
const u8 * eap_peer_tls_process_init(struct eap_sm *sm,
717
struct eap_ssl_data *data,
719
struct eap_method_ret *ret,
720
const u8 *reqData, size_t reqDataLen,
721
size_t *len, u8 *flags)
725
unsigned int tls_msg_len;
727
if (tls_get_errors(sm->ssl_ctx)) {
728
wpa_printf(MSG_INFO, "SSL: TLS errors detected");
733
pos = eap_hdr_validate(EAP_VENDOR_IETF, eap_type, reqData, reqDataLen,
741
wpa_printf(MSG_DEBUG, "SSL: Received packet(len=%lu) - "
742
"Flags 0x%02x", (unsigned long) reqDataLen, *flags);
743
if (*flags & EAP_TLS_FLAGS_LENGTH_INCLUDED) {
745
wpa_printf(MSG_INFO, "SSL: Short frame with TLS "
750
tls_msg_len = WPA_GET_BE32(pos);
751
wpa_printf(MSG_DEBUG, "SSL: TLS Message Length: %d",
753
if (data->tls_in_left == 0) {
754
data->tls_in_total = tls_msg_len;
755
data->tls_in_left = tls_msg_len;
756
os_free(data->tls_in);
758
data->tls_in_len = 0;
765
ret->methodState = METHOD_MAY_CONT;
766
ret->decision = DECISION_FAIL;
767
ret->allowNotifications = TRUE;
775
* eap_peer_tls_reset_input - Reset input buffers
776
* @data: Data for TLS processing
778
* This function frees any allocated memory for input buffers and resets input
781
void eap_peer_tls_reset_input(struct eap_ssl_data *data)
783
data->tls_in_left = data->tls_in_total = data->tls_in_len = 0;
784
os_free(data->tls_in);
790
* eap_peer_tls_reset_output - Reset output buffers
791
* @data: Data for TLS processing
793
* This function frees any allocated memory for output buffers and resets
796
void eap_peer_tls_reset_output(struct eap_ssl_data *data)
798
data->tls_out_len = 0;
799
data->tls_out_pos = 0;
800
os_free(data->tls_out);
801
data->tls_out = NULL;
806
* eap_peer_tls_decrypt - Decrypt received phase 2 TLS message
807
* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
808
* @data: Data for TLS processing
809
* @in_data: Message received from the server
810
* @in_len: Length of in_data
811
* @in_decrypted: Buffer for returning a pointer to the decrypted message
812
* @len_decrypted: Buffer for returning the length of the decrypted message
813
* Returns: 0 on success, 1 if more input data is needed, or -1 on failure
815
int eap_peer_tls_decrypt(struct eap_sm *sm, struct eap_ssl_data *data,
816
const u8 *in_data, size_t in_len,
817
u8 **in_decrypted, size_t *len_decrypted)
821
size_t msg_len, buf_len;
824
msg = eap_peer_tls_data_reassemble(data, in_data, in_len, &msg_len,
827
return need_more_input ? 1 : -1;
830
if (data->tls_in_total > buf_len)
831
buf_len = data->tls_in_total;
832
*in_decrypted = os_malloc(buf_len ? buf_len : 1);
833
if (*in_decrypted == NULL) {
834
eap_peer_tls_reset_input(data);
835
wpa_printf(MSG_WARNING, "SSL: Failed to allocate memory for "
840
res = tls_connection_decrypt(sm->ssl_ctx, data->conn, msg, msg_len,
841
*in_decrypted, buf_len);
842
eap_peer_tls_reset_input(data);
844
wpa_printf(MSG_INFO, "SSL: Failed to decrypt Phase 2 data");
847
*len_decrypted = res;
853
* eap_peer_tls_encrypt - Encrypt phase 2 TLS message
854
* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
855
* @data: Data for TLS processing
856
* @eap_type: EAP type (EAP_TYPE_TLS, EAP_TYPE_PEAP, ...)
857
* @peap_version: Version number for EAP-PEAP/TTLS
858
* @id: EAP identifier for the response
859
* @in_data: Plaintext phase 2 data to encrypt or %NULL to continue fragments
860
* @in_len: Length of in_data
861
* @out_data: Buffer for returning a pointer to the encrypted response message
862
* @out_len: Buffer for returning the length of the encrypted response message
863
* Returns: 0 on success, -1 on failure
865
int eap_peer_tls_encrypt(struct eap_sm *sm, struct eap_ssl_data *data,
866
EapType eap_type, int peap_version, u8 id,
867
const u8 *in_data, size_t in_len,
868
u8 **out_data, size_t *out_len)
874
eap_peer_tls_reset_output(data);
876
data->tls_out = os_malloc(len);
877
if (data->tls_out == NULL)
880
res = tls_connection_encrypt(sm->ssl_ctx, data->conn, in_data,
881
in_len, data->tls_out, len);
883
wpa_printf(MSG_INFO, "SSL: Failed to encrypt Phase 2 "
885
(unsigned long) in_len);
886
eap_peer_tls_reset_output(data);
890
data->tls_out_len = res;
893
return eap_tls_process_output(data, eap_type, peap_version, id, 0,
899
* eap_peer_select_phase2_methods - Select phase 2 EAP method
900
* @config: Pointer to the network configuration
901
* @prefix: 'phase2' configuration prefix, e.g., "auth="
902
* @types: Buffer for returning allocated list of allowed EAP methods
903
* @num_types: Buffer for returning number of allocated EAP methods
904
* Returns: 0 on success, -1 on failure
906
* This function is used to parse EAP method list and select allowed methods
907
* for Phase2 authentication.
909
int eap_peer_select_phase2_methods(struct wpa_ssid *config, const char *prefix,
910
struct eap_method_type **types,
913
char *start, *pos, *buf;
914
struct eap_method_type *methods = NULL, *_methods;
916
size_t num_methods = 0, prefix_len;
918
if (config == NULL || config->phase2 == NULL)
921
start = buf = os_strdup(config->phase2);
925
prefix_len = os_strlen(prefix);
927
while (start && *start != '\0') {
929
pos = os_strstr(start, prefix);
932
if (start != pos && *(pos - 1) != ' ') {
933
start = pos + prefix_len;
937
start = pos + prefix_len;
938
pos = os_strchr(start, ' ');
941
method = eap_get_phase2_type(start, &vendor);
942
if (vendor == EAP_VENDOR_IETF && method == EAP_TYPE_NONE) {
943
wpa_printf(MSG_ERROR, "TLS: Unsupported Phase2 EAP "
944
"method '%s'", start);
947
_methods = os_realloc(methods,
948
num_methods * sizeof(*methods));
949
if (_methods == NULL) {
955
methods[num_methods - 1].vendor = vendor;
956
methods[num_methods - 1].method = method;
966
methods = eap_get_phase2_types(config, &num_methods);
968
if (methods == NULL) {
969
wpa_printf(MSG_ERROR, "TLS: No Phase2 EAP methods available");
972
wpa_hexdump(MSG_DEBUG, "TLS: Phase2 EAP types",
974
num_methods * sizeof(struct eap_method_type));
977
*num_types = num_methods;
984
* eap_peer_tls_phase2_nak - Generate EAP-Nak for Phase 2
985
* @types: Buffer for returning allocated list of allowed EAP methods
986
* @num_types: Buffer for returning number of allocated EAP methods
987
* @hdr: EAP-Request header (and the following EAP type octet)
988
* @resp: Buffer for returning the EAP-Nak message
989
* @resp_len: Buffer for returning the length of the EAP-Nak message
990
* Returns: 0 on success, -1 on failure
992
int eap_peer_tls_phase2_nak(struct eap_method_type *types, size_t num_types,
993
struct eap_hdr *hdr, u8 **resp, size_t *resp_len)
995
struct eap_hdr *resp_hdr;
996
u8 *pos = (u8 *) (hdr + 1);
999
/* TODO: add support for expanded Nak */
1000
wpa_printf(MSG_DEBUG, "TLS: Phase 2 Request: Nak type=%d", *pos);
1001
wpa_hexdump(MSG_DEBUG, "TLS: Allowed Phase2 EAP types",
1002
(u8 *) types, num_types * sizeof(struct eap_method_type));
1003
*resp_len = sizeof(struct eap_hdr) + 1;
1004
*resp = os_malloc(*resp_len + num_types);
1008
resp_hdr = (struct eap_hdr *) (*resp);
1009
resp_hdr->code = EAP_CODE_RESPONSE;
1010
resp_hdr->identifier = hdr->identifier;
1011
pos = (u8 *) (resp_hdr + 1);
1012
*pos++ = EAP_TYPE_NAK;
1013
for (i = 0; i < num_types; i++) {
1014
if (types[i].vendor == EAP_VENDOR_IETF &&
1015
types[i].method < 256) {
1017
*pos++ = types[i].method;
1020
resp_hdr->length = host_to_be16(*resp_len);
added
removed
src/eap_peer/eap_tls_common.c
