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* EAP peer: EAP-TLS/PEAP/TTLS/FAST common functions
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* Copyright (c) 2004-2008, 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 "eap_config.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 eap_peer_config *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 eap_peer_config *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 eap_peer_config *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 eap_peer_config *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 eap_peer_config *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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* 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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struct wpabuf **out_data)
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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 = wpabuf_alloc_ext_data(appl_data, appl_data_len);
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if (*out_data == NULL) {
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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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* 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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struct wpabuf **out_data)
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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;
485
wpa_printf(MSG_DEBUG, "SSL: sending %lu bytes, more fragments "
486
"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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*out_data = eap_msg_alloc(EAP_VENDOR_IETF, eap_type,
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1 + length_included * 4 + len,
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EAP_CODE_RESPONSE, id);
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if (*out_data == NULL)
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flags = wpabuf_put(*out_data, 1);
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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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wpabuf_put_be32(*out_data, data->tls_out_len);
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wpabuf_put_data(*out_data, &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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* Returns: 0 on success, 1 if more input data is needed, 2 if application data
530
* is available, or -1 on failure
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* This function can be used to process TLS handshake messages. It reassembles
533
* 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.
537
* out_data is used to return the response message if the return value of this
538
* function is 0, 2, or -1. In case of failure, the message is likely a TLS
539
* alarm message. The caller is responsible for freeing the allocated buffer if
540
* *out_data is not %NULL.
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* This function is called for each received TLS message during the TLS
543
* handshake after eap_peer_tls_process_init() call and possible processing of
544
* TLS Flags field. Once the handshake has been completed, i.e., when
545
* tls_connection_established() returns 1, EAP method specific decrypting of
546
* the tunneled data is used.
548
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,
550
u8 id, const u8 *in_data, size_t in_len,
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struct wpabuf **out_data)
557
if (data->tls_out_len > 0 && in_len > 0) {
558
wpa_printf(MSG_DEBUG, "SSL: Received non-ACK when output "
559
"fragments are waiting to be sent out");
563
if (data->tls_out_len == 0) {
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* No more data to send out - expect to receive more data from
568
int res = eap_tls_process_input(sm, data, in_data, in_len,
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* Input processing failed (res = -1) or more data is
579
* The incoming message has been reassembled and processed. The
580
* response was allocated into data->tls_out buffer.
584
if (data->tls_out == NULL) {
586
* No outgoing fragments remaining from the previous message
587
* and no new message generated. This indicates an error in TLS
590
eap_peer_tls_reset_output(data);
594
if (tls_connection_get_failed(sm->ssl_ctx, data->conn)) {
595
/* TLS processing has failed - return error */
596
wpa_printf(MSG_DEBUG, "SSL: Failed - tls_out available to "
599
/* TODO: clean pin if engine used? */
602
if (data->tls_out_len == 0) {
604
* TLS negotiation should now be complete since all other cases
605
* needing more data should have been caught above based on
606
* the TLS Message Length field.
608
wpa_printf(MSG_DEBUG, "SSL: No data to be sent out");
609
os_free(data->tls_out);
610
data->tls_out = NULL;
614
/* Send the pending message (in fragments, if needed). */
615
return eap_tls_process_output(data, eap_type, peap_version, id, ret,
621
* eap_peer_tls_build_ack - Build a TLS ACK frame
622
* @id: EAP identifier for the response
623
* @eap_type: EAP type (EAP_TYPE_TLS, EAP_TYPE_PEAP, ...)
624
* @peap_version: Version number for EAP-PEAP/TTLS
625
* Returns: Pointer to the allocated ACK frame or %NULL on failure
627
struct wpabuf * eap_peer_tls_build_ack(u8 id, EapType eap_type,
632
resp = eap_msg_alloc(EAP_VENDOR_IETF, eap_type, 1, EAP_CODE_RESPONSE,
636
wpa_printf(MSG_DEBUG, "SSL: Building ACK (type=%d id=%d ver=%d)",
637
(int) eap_type, id, peap_version);
638
wpabuf_put_u8(resp, peap_version); /* Flags */
644
* eap_peer_tls_reauth_init - Re-initialize shared TLS for session resumption
645
* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
646
* @data: Data for TLS processing
647
* Returns: 0 on success, -1 on failure
649
int eap_peer_tls_reauth_init(struct eap_sm *sm, struct eap_ssl_data *data)
651
eap_peer_tls_reset_input(data);
652
eap_peer_tls_reset_output(data);
653
return tls_connection_shutdown(sm->ssl_ctx, data->conn);
658
* eap_peer_tls_status - Get TLS status
659
* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
660
* @data: Data for TLS processing
661
* @buf: Buffer for status information
662
* @buflen: Maximum buffer length
663
* @verbose: Whether to include verbose status information
664
* Returns: Number of bytes written to buf.
666
int eap_peer_tls_status(struct eap_sm *sm, struct eap_ssl_data *data,
667
char *buf, size_t buflen, int verbose)
672
if (tls_get_cipher(sm->ssl_ctx, data->conn, name, sizeof(name)) == 0) {
673
ret = os_snprintf(buf + len, buflen - len,
674
"EAP TLS cipher=%s\n", name);
675
if (ret < 0 || (size_t) ret >= buflen - len)
685
* eap_peer_tls_process_init - Initial validation/processing of EAP requests
686
* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
687
* @data: Data for TLS processing
688
* @eap_type: EAP type (EAP_TYPE_TLS, EAP_TYPE_PEAP, ...)
689
* @ret: Return values from EAP request validation and processing
690
* @reqData: EAP request to be processed (eapReqData)
691
* @len: Buffer for returning length of the remaining payload
692
* @flags: Buffer for returning TLS flags
693
* Returns: Pointer to payload after TLS flags and length or %NULL on failure
695
* This function validates the EAP header and processes the optional TLS
696
* Message Length field. If this is the first fragment of a TLS message, the
697
* TLS reassembly code is initialized to receive the indicated number of bytes.
699
* EAP-TLS, EAP-PEAP, EAP-TTLS, and EAP-FAST methods are expected to use this
700
* function as the first step in processing received messages. They will need
701
* to process the flags (apart from Message Length Included) that are returned
702
* through the flags pointer and the message payload that will be returned (and
703
* the length is returned through the len pointer). Return values (ret) are set
704
* for continuation of EAP method processing. The caller is responsible for
705
* setting these to indicate completion (either success or failure) based on
706
* the authentication result.
708
const u8 * eap_peer_tls_process_init(struct eap_sm *sm,
709
struct eap_ssl_data *data,
711
struct eap_method_ret *ret,
712
const struct wpabuf *reqData,
713
size_t *len, u8 *flags)
717
unsigned int tls_msg_len;
719
if (tls_get_errors(sm->ssl_ctx)) {
720
wpa_printf(MSG_INFO, "SSL: TLS errors detected");
725
pos = eap_hdr_validate(EAP_VENDOR_IETF, eap_type, reqData, &left);
732
wpa_printf(MSG_DEBUG, "SSL: Received packet(len=%lu) - "
733
"Flags 0x%02x", (unsigned long) wpabuf_len(reqData),
735
if (*flags & EAP_TLS_FLAGS_LENGTH_INCLUDED) {
737
wpa_printf(MSG_INFO, "SSL: Short frame with TLS "
742
tls_msg_len = WPA_GET_BE32(pos);
743
wpa_printf(MSG_DEBUG, "SSL: TLS Message Length: %d",
745
if (data->tls_in_left == 0) {
746
data->tls_in_total = tls_msg_len;
747
data->tls_in_left = tls_msg_len;
748
os_free(data->tls_in);
750
data->tls_in_len = 0;
757
ret->methodState = METHOD_MAY_CONT;
758
ret->decision = DECISION_FAIL;
759
ret->allowNotifications = TRUE;
767
* eap_peer_tls_reset_input - Reset input buffers
768
* @data: Data for TLS processing
770
* This function frees any allocated memory for input buffers and resets input
773
void eap_peer_tls_reset_input(struct eap_ssl_data *data)
775
data->tls_in_left = data->tls_in_total = data->tls_in_len = 0;
776
os_free(data->tls_in);
782
* eap_peer_tls_reset_output - Reset output buffers
783
* @data: Data for TLS processing
785
* This function frees any allocated memory for output buffers and resets
788
void eap_peer_tls_reset_output(struct eap_ssl_data *data)
790
data->tls_out_len = 0;
791
data->tls_out_pos = 0;
792
os_free(data->tls_out);
793
data->tls_out = NULL;
798
* eap_peer_tls_decrypt - Decrypt received phase 2 TLS message
799
* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
800
* @data: Data for TLS processing
801
* @in_data: Message received from the server
802
* @in_decrypted: Buffer for returning a pointer to the decrypted message
803
* Returns: 0 on success, 1 if more input data is needed, or -1 on failure
805
int eap_peer_tls_decrypt(struct eap_sm *sm, struct eap_ssl_data *data,
806
const struct wpabuf *in_data,
807
struct wpabuf **in_decrypted)
811
size_t msg_len, buf_len;
814
msg = eap_peer_tls_data_reassemble(data, wpabuf_head(in_data),
815
wpabuf_len(in_data), &msg_len,
818
return need_more_input ? 1 : -1;
820
buf_len = wpabuf_len(in_data);
821
if (data->tls_in_total > buf_len)
822
buf_len = data->tls_in_total;
823
*in_decrypted = wpabuf_alloc(buf_len ? buf_len : 1);
824
if (*in_decrypted == NULL) {
825
eap_peer_tls_reset_input(data);
826
wpa_printf(MSG_WARNING, "SSL: Failed to allocate memory for "
831
res = tls_connection_decrypt(sm->ssl_ctx, data->conn, msg, msg_len,
832
wpabuf_mhead(*in_decrypted), buf_len);
833
eap_peer_tls_reset_input(data);
835
wpa_printf(MSG_INFO, "SSL: Failed to decrypt Phase 2 data");
838
wpabuf_put(*in_decrypted, res);
844
* eap_peer_tls_encrypt - Encrypt phase 2 TLS message
845
* @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
846
* @data: Data for TLS processing
847
* @eap_type: EAP type (EAP_TYPE_TLS, EAP_TYPE_PEAP, ...)
848
* @peap_version: Version number for EAP-PEAP/TTLS
849
* @id: EAP identifier for the response
850
* @in_data: Plaintext phase 2 data to encrypt or %NULL to continue fragments
851
* @out_data: Buffer for returning a pointer to the encrypted response message
852
* Returns: 0 on success, -1 on failure
854
int eap_peer_tls_encrypt(struct eap_sm *sm, struct eap_ssl_data *data,
855
EapType eap_type, int peap_version, u8 id,
856
const struct wpabuf *in_data,
857
struct wpabuf **out_data)
863
eap_peer_tls_reset_output(data);
864
len = wpabuf_len(in_data) + 100;
865
data->tls_out = os_malloc(len);
866
if (data->tls_out == NULL)
869
res = tls_connection_encrypt(sm->ssl_ctx, data->conn,
870
wpabuf_head(in_data),
874
wpa_printf(MSG_INFO, "SSL: Failed to encrypt Phase 2 "
876
(unsigned long) wpabuf_len(in_data));
877
eap_peer_tls_reset_output(data);
881
data->tls_out_len = res;
884
return eap_tls_process_output(data, eap_type, peap_version, id, 0,
890
* eap_peer_select_phase2_methods - Select phase 2 EAP method
891
* @config: Pointer to the network configuration
892
* @prefix: 'phase2' configuration prefix, e.g., "auth="
893
* @types: Buffer for returning allocated list of allowed EAP methods
894
* @num_types: Buffer for returning number of allocated EAP methods
895
* Returns: 0 on success, -1 on failure
897
* This function is used to parse EAP method list and select allowed methods
898
* for Phase2 authentication.
900
int eap_peer_select_phase2_methods(struct eap_peer_config *config,
902
struct eap_method_type **types,
905
char *start, *pos, *buf;
906
struct eap_method_type *methods = NULL, *_methods;
908
size_t num_methods = 0, prefix_len;
910
if (config == NULL || config->phase2 == NULL)
913
start = buf = os_strdup(config->phase2);
917
prefix_len = os_strlen(prefix);
919
while (start && *start != '\0') {
921
pos = os_strstr(start, prefix);
924
if (start != pos && *(pos - 1) != ' ') {
925
start = pos + prefix_len;
929
start = pos + prefix_len;
930
pos = os_strchr(start, ' ');
933
method = eap_get_phase2_type(start, &vendor);
934
if (vendor == EAP_VENDOR_IETF && method == EAP_TYPE_NONE) {
935
wpa_printf(MSG_ERROR, "TLS: Unsupported Phase2 EAP "
936
"method '%s'", start);
939
_methods = os_realloc(methods,
940
num_methods * sizeof(*methods));
941
if (_methods == NULL) {
947
methods[num_methods - 1].vendor = vendor;
948
methods[num_methods - 1].method = method;
958
methods = eap_get_phase2_types(config, &num_methods);
960
if (methods == NULL) {
961
wpa_printf(MSG_ERROR, "TLS: No Phase2 EAP methods available");
964
wpa_hexdump(MSG_DEBUG, "TLS: Phase2 EAP types",
966
num_methods * sizeof(struct eap_method_type));
969
*num_types = num_methods;
976
* eap_peer_tls_phase2_nak - Generate EAP-Nak for Phase 2
977
* @types: Buffer for returning allocated list of allowed EAP methods
978
* @num_types: Buffer for returning number of allocated EAP methods
979
* @hdr: EAP-Request header (and the following EAP type octet)
980
* @resp: Buffer for returning the EAP-Nak message
981
* Returns: 0 on success, -1 on failure
983
int eap_peer_tls_phase2_nak(struct eap_method_type *types, size_t num_types,
984
struct eap_hdr *hdr, struct wpabuf **resp)
986
u8 *pos = (u8 *) (hdr + 1);
989
/* TODO: add support for expanded Nak */
990
wpa_printf(MSG_DEBUG, "TLS: Phase 2 Request: Nak type=%d", *pos);
991
wpa_hexdump(MSG_DEBUG, "TLS: Allowed Phase2 EAP types",
992
(u8 *) types, num_types * sizeof(struct eap_method_type));
993
*resp = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_NAK, num_types,
994
EAP_CODE_RESPONSE, hdr->identifier);
998
for (i = 0; i < num_types; i++) {
999
if (types[i].vendor == EAP_VENDOR_IETF &&
1000
types[i].method < 256)
1001
wpabuf_put_u8(*resp, types[i].method);
1004
eap_update_len(*resp);
added
removed
src/eap_peer/eap_tls_common.c
