src/crypto/tls_internal.c - LeafOS-Project/android_external_wpa_supplicant_8 - Gitiles

 /*
  * TLS interface functions and an internal TLS implementation
  * Copyright (c) 2004-2019, Jouni Malinen <j@w1.fi>
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
  *
  * This file interface functions for hostapd/wpa_supplicant to use the
  * integrated TLSv1 implementation.
  */

 #include "includes.h"

 #include "common.h"
 #include "tls.h"
 #include "tls/tlsv1_client.h"
 #include "tls/tlsv1_server.h"


 static int tls_ref_count = 0;

 struct tls_global {
 	int server;
 	struct tlsv1_credentials *server_cred;
 	int check_crl;

 	void (*event_cb)(void *ctx, enum tls_event ev,
 			 union tls_event_data *data);
 	void *cb_ctx;
 	int cert_in_cb;
 };

 struct tls_connection {
 	struct tlsv1_client *client;
 	struct tlsv1_server *server;
 	struct tls_global *global;
 };


 void * tls_init(const struct tls_config *conf)
 {
 	struct tls_global *global;

 	if (tls_ref_count == 0) {
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 		if (tlsv1_client_global_init())
 			return NULL;
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 		if (tlsv1_server_global_init())
 			return NULL;
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	}
 	tls_ref_count++;

 	global = os_zalloc(sizeof(*global));
 	if (global == NULL)
 		return NULL;
 	if (conf) {
 		global->event_cb = conf->event_cb;
 		global->cb_ctx = conf->cb_ctx;
 		global->cert_in_cb = conf->cert_in_cb;
 	}

 	return global;
 }

 void tls_deinit(void *ssl_ctx)
 {
 	struct tls_global *global = ssl_ctx;
 	tls_ref_count--;
 	if (tls_ref_count == 0) {
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 		tlsv1_client_global_deinit();
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 		tlsv1_server_global_deinit();
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	}
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	tlsv1_cred_free(global->server_cred);
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	os_free(global);
 }


 int tls_get_errors(void *tls_ctx)
 {
 	return 0;
 }


 struct tls_connection * tls_connection_init(void *tls_ctx)
 {
 	struct tls_connection *conn;
 	struct tls_global *global = tls_ctx;

 	conn = os_zalloc(sizeof(*conn));
 	if (conn == NULL)
 		return NULL;
 	conn->global = global;

 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (!global->server) {
 		conn->client = tlsv1_client_init();
 		if (conn->client == NULL) {
 			os_free(conn);
 			return NULL;
 		}
 		tlsv1_client_set_cb(conn->client, global->event_cb,
 				    global->cb_ctx, global->cert_in_cb);
 	}
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (global->server) {
 		conn->server = tlsv1_server_init(global->server_cred);
 		if (conn->server == NULL) {
 			os_free(conn);
 			return NULL;
 		}
 	}
 #endif /* CONFIG_TLS_INTERNAL_SERVER */

 	return conn;
 }


 #ifdef CONFIG_TESTING_OPTIONS
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 void tls_connection_set_test_flags(struct tls_connection *conn, u32 flags)
 {
 	if (conn->server)
 		tlsv1_server_set_test_flags(conn->server, flags);
 }
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 #endif /* CONFIG_TESTING_OPTIONS */


 void tls_connection_set_log_cb(struct tls_connection *conn,
 			       void (*log_cb)(void *ctx, const char *msg),
 			       void *ctx)
 {
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server)
 		tlsv1_server_set_log_cb(conn->server, log_cb, ctx);
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 }


 void tls_connection_deinit(void *tls_ctx, struct tls_connection *conn)
 {
 	if (conn == NULL)
 		return;
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (conn->client)
 		tlsv1_client_deinit(conn->client);
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server)
 		tlsv1_server_deinit(conn->server);
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	os_free(conn);
 }


 int tls_connection_established(void *tls_ctx, struct tls_connection *conn)
 {
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (conn->client)
 		return tlsv1_client_established(conn->client);
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server)
 		return tlsv1_server_established(conn->server);
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	return 0;
 }


 char * tls_connection_peer_serial_num(void *tls_ctx,
 				      struct tls_connection *conn)
 {
 	/* TODO */
 	return NULL;
 }


 int tls_connection_shutdown(void *tls_ctx, struct tls_connection *conn)
 {
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (conn->client)
 		return tlsv1_client_shutdown(conn->client);
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server)
 		return tlsv1_server_shutdown(conn->server);
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	return -1;
 }


 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
 			      const struct tls_connection_params *params)
 {
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	struct tlsv1_credentials *cred;

 	if (conn->client == NULL)
 		return -1;

 	if (params->flags & TLS_CONN_EXT_CERT_CHECK) {
 		wpa_printf(MSG_INFO,
 			   "TLS: tls_ext_cert_check=1 not supported");
 		return -1;
 	}

 	cred = tlsv1_cred_alloc();
 	if (cred == NULL)
 		return -1;

 	if (params->subject_match) {
 		wpa_printf(MSG_INFO, "TLS: subject_match not supported");
 		tlsv1_cred_free(cred);
 		return -1;
 	}

 	if (params->altsubject_match) {
 		wpa_printf(MSG_INFO, "TLS: altsubject_match not supported");
 		tlsv1_cred_free(cred);
 		return -1;
 	}

 	if (params->suffix_match) {
 		wpa_printf(MSG_INFO, "TLS: suffix_match not supported");
 		tlsv1_cred_free(cred);
 		return -1;
 	}

 	if (params->domain_match) {
 		wpa_printf(MSG_INFO, "TLS: domain_match not supported");
 		tlsv1_cred_free(cred);
 		return -1;
 	}

 	if (params->openssl_ciphers) {
 		wpa_printf(MSG_INFO, "TLS: openssl_ciphers not supported");
 		tlsv1_cred_free(cred);
 		return -1;
 	}

 	if (params->openssl_ecdh_curves) {
 		wpa_printf(MSG_INFO, "TLS: openssl_ecdh_curves not supported");
 		tlsv1_cred_free(cred);
 		return -1;
 	}

 	if (tlsv1_set_ca_cert(cred, params->ca_cert,
 			      params->ca_cert_blob, params->ca_cert_blob_len,
 			      params->ca_path)) {
 		wpa_printf(MSG_INFO, "TLS: Failed to configure trusted CA "
 			   "certificates");
 		tlsv1_cred_free(cred);
 		return -1;
 	}

 	if (tlsv1_set_cert(cred, params->client_cert,
 			   params->client_cert_blob,
 			   params->client_cert_blob_len)) {
 		wpa_printf(MSG_INFO, "TLS: Failed to configure client "
 			   "certificate");
 		tlsv1_cred_free(cred);
 		return -1;
 	}

 	if (tlsv1_set_private_key(cred, params->private_key,
 				  params->private_key_passwd,
 				  params->private_key_blob,
 				  params->private_key_blob_len)) {
 		wpa_printf(MSG_INFO, "TLS: Failed to load private key");
 		tlsv1_cred_free(cred);
 		return -1;
 	}

 	if (tlsv1_client_set_cred(conn->client, cred) < 0) {
 		tlsv1_cred_free(cred);
 		return -1;
 	}

 	tlsv1_client_set_flags(conn->client, params->flags);

 	return 0;
 #else /* CONFIG_TLS_INTERNAL_CLIENT */
 	return -1;
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 }


 int tls_global_set_params(void *tls_ctx,
 			  const struct tls_connection_params *params)
 {
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	struct tls_global *global = tls_ctx;
 	struct tlsv1_credentials *cred;

 	if (params->check_cert_subject)
 		return -1; /* not yet supported */

 	/* Currently, global parameters are only set when running in server
 	 * mode. */
 	global->server = 1;
 	tlsv1_cred_free(global->server_cred);
 	global->server_cred = cred = tlsv1_cred_alloc();
 	if (cred == NULL)
 		return -1;

 	if (tlsv1_set_ca_cert(cred, params->ca_cert, params->ca_cert_blob,
 			      params->ca_cert_blob_len, params->ca_path)) {
 		wpa_printf(MSG_INFO, "TLS: Failed to configure trusted CA "
 			   "certificates");
 		return -1;
 	}

 	if (tlsv1_set_cert(cred, params->client_cert, params->client_cert_blob,
 			   params->client_cert_blob_len)) {
 		wpa_printf(MSG_INFO, "TLS: Failed to configure server "
 			   "certificate");
 		return -1;
 	}

 	if (tlsv1_set_private_key(cred, params->private_key,
 				  params->private_key_passwd,
 				  params->private_key_blob,
 				  params->private_key_blob_len)) {
 		wpa_printf(MSG_INFO, "TLS: Failed to load private key");
 		return -1;
 	}

 	if (tlsv1_set_dhparams(cred, params->dh_file, NULL, 0)) {
 		wpa_printf(MSG_INFO, "TLS: Failed to load DH parameters");
 		return -1;
 	}

 	if (params->ocsp_stapling_response)
 		cred->ocsp_stapling_response =
 			os_strdup(params->ocsp_stapling_response);
 	if (params->ocsp_stapling_response_multi)
 		cred->ocsp_stapling_response_multi =
 			os_strdup(params->ocsp_stapling_response_multi);

 	return 0;
 #else /* CONFIG_TLS_INTERNAL_SERVER */
 	return -1;
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 }


 int tls_global_set_verify(void *tls_ctx, int check_crl, int strict)
 {
 	struct tls_global *global = tls_ctx;
 	global->check_crl = check_crl;
 	return 0;
 }


 int tls_connection_set_verify(void *tls_ctx, struct tls_connection *conn,
 			      int verify_peer, unsigned int flags,
 			      const u8 *session_ctx, size_t session_ctx_len)
 {
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server)
 		return tlsv1_server_set_verify(conn->server, verify_peer);
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	return -1;
 }


 int tls_connection_get_random(void *tls_ctx, struct tls_connection *conn,
 			      struct tls_random *data)
 {
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (conn->client)
 		return tlsv1_client_get_random(conn->client, data);
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server)
 		return tlsv1_server_get_random(conn->server, data);
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	return -1;
 }


 static int tls_get_keyblock_size(struct tls_connection *conn)
 {
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (conn->client)
 		return tlsv1_client_get_keyblock_size(conn->client);
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server)
 		return tlsv1_server_get_keyblock_size(conn->server);
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	return -1;
 }


 static int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
 			      const char *label, const u8 *context,
 			      size_t context_len, int server_random_first,
 			      int skip_keyblock, u8 *out, size_t out_len)
 {
 	int ret = -1, skip = 0;
 	u8 *tmp_out = NULL;
 	u8 *_out = out;

 	if (skip_keyblock) {
 		skip = tls_get_keyblock_size(conn);
 		if (skip < 0)
 			return -1;
 		tmp_out = os_malloc(skip + out_len);
 		if (!tmp_out)
 			return -1;
 		_out = tmp_out;
 	}

 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (conn->client) {
 		ret = tlsv1_client_prf(conn->client, label, context,
 				       context_len, server_random_first,
 				       _out, skip + out_len);
 	}
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server) {
 		ret = tlsv1_server_prf(conn->server, label, context,
 				       context_len, server_random_first,
 				       _out, skip + out_len);
 	}
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	if (ret == 0 && skip_keyblock)
 		os_memcpy(out, _out + skip, out_len);
 	bin_clear_free(tmp_out, skip);

 	return ret;
 }


 int tls_connection_export_key(void *tls_ctx, struct tls_connection *conn,
 			      const char *label, const u8 *context,
 			      size_t context_len, u8 *out, size_t out_len)
 {
 	return tls_connection_prf(tls_ctx, conn, label, context, context_len,
 				  0, 0, out, out_len);
 }


 int tls_connection_get_eap_fast_key(void *tls_ctx, struct tls_connection *conn,
 				    u8 *out, size_t out_len)
 {
 	return tls_connection_prf(tls_ctx, conn, "key expansion", NULL, 0,
 				  1, 1, out, out_len);
 }


 struct wpabuf * tls_connection_handshake(void *tls_ctx,
 					 struct tls_connection *conn,
 					 const struct wpabuf *in_data,
 					 struct wpabuf **appl_data)
 {
 	return tls_connection_handshake2(tls_ctx, conn, in_data, appl_data,
 					 NULL);
 }


 struct wpabuf * tls_connection_handshake2(void *tls_ctx,
 					  struct tls_connection *conn,
 					  const struct wpabuf *in_data,
 					  struct wpabuf **appl_data,
 					  int *need_more_data)
 {
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	u8 *res, *ad;
 	size_t res_len, ad_len;
 	struct wpabuf *out;

 	if (conn->client == NULL)
 		return NULL;

 	ad = NULL;
 	res = tlsv1_client_handshake(conn->client,
 				     in_data ? wpabuf_head(in_data) : NULL,
 				     in_data ? wpabuf_len(in_data) : 0,
 				     &res_len, &ad, &ad_len, need_more_data);
 	if (res == NULL)
 		return NULL;
 	out = wpabuf_alloc_ext_data(res, res_len);
 	if (out == NULL) {
 		os_free(res);
 		os_free(ad);
 		return NULL;
 	}
 	if (appl_data) {
 		if (ad) {
 			*appl_data = wpabuf_alloc_ext_data(ad, ad_len);
 			if (*appl_data == NULL)
 				os_free(ad);
 		} else
 			*appl_data = NULL;
 	} else
 		os_free(ad);

 	return out;
 #else /* CONFIG_TLS_INTERNAL_CLIENT */
 	return NULL;
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 }


 struct wpabuf * tls_connection_server_handshake(void *tls_ctx,
 						struct tls_connection *conn,
 						const struct wpabuf *in_data,
 						struct wpabuf **appl_data)
 {
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	u8 *res;
 	size_t res_len;
 	struct wpabuf *out;

 	if (conn->server == NULL)
 		return NULL;

 	if (appl_data)
 		*appl_data = NULL;

 	res = tlsv1_server_handshake(conn->server, wpabuf_head(in_data),
 				     wpabuf_len(in_data), &res_len);
 	if (res == NULL && tlsv1_server_established(conn->server))
 		return wpabuf_alloc(0);
 	if (res == NULL)
 		return NULL;
 	out = wpabuf_alloc_ext_data(res, res_len);
 	if (out == NULL) {
 		os_free(res);
 		return NULL;
 	}

 	return out;
 #else /* CONFIG_TLS_INTERNAL_SERVER */
 	return NULL;
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 }


 struct wpabuf * tls_connection_encrypt(void *tls_ctx,
 				       struct tls_connection *conn,
 				       const struct wpabuf *in_data)
 {
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (conn->client) {
 		struct wpabuf *buf;
 		int res;
 		buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
 		if (buf == NULL)
 			return NULL;
 		res = tlsv1_client_encrypt(conn->client, wpabuf_head(in_data),
 					   wpabuf_len(in_data),
 					   wpabuf_mhead(buf),
 					   wpabuf_size(buf));
 		if (res < 0) {
 			wpabuf_free(buf);
 			return NULL;
 		}
 		wpabuf_put(buf, res);
 		return buf;
 	}
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server) {
 		struct wpabuf *buf;
 		int res;
 		buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
 		if (buf == NULL)
 			return NULL;
 		res = tlsv1_server_encrypt(conn->server, wpabuf_head(in_data),
 					   wpabuf_len(in_data),
 					   wpabuf_mhead(buf),
 					   wpabuf_size(buf));
 		if (res < 0) {
 			wpabuf_free(buf);
 			return NULL;
 		}
 		wpabuf_put(buf, res);
 		return buf;
 	}
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	return NULL;
 }


 struct wpabuf * tls_connection_decrypt(void *tls_ctx,
 				       struct tls_connection *conn,
 				       const struct wpabuf *in_data)
 {
 	return tls_connection_decrypt2(tls_ctx, conn, in_data, NULL);
 }


 struct wpabuf * tls_connection_decrypt2(void *tls_ctx,
 					struct tls_connection *conn,
 					const struct wpabuf *in_data,
 					int *need_more_data)
 {
 	if (need_more_data)
 		*need_more_data = 0;

 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (conn->client) {
 		return tlsv1_client_decrypt(conn->client, wpabuf_head(in_data),
 					    wpabuf_len(in_data),
 					    need_more_data);
 	}
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server) {
 		struct wpabuf *buf;
 		int res;
 		buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3);
 		if (buf == NULL)
 			return NULL;
 		res = tlsv1_server_decrypt(conn->server, wpabuf_head(in_data),
 					   wpabuf_len(in_data),
 					   wpabuf_mhead(buf),
 					   wpabuf_size(buf));
 		if (res < 0) {
 			wpabuf_free(buf);
 			return NULL;
 		}
 		wpabuf_put(buf, res);
 		return buf;
 	}
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	return NULL;
 }


 int tls_connection_resumed(void *tls_ctx, struct tls_connection *conn)
 {
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (conn->client)
 		return tlsv1_client_resumed(conn->client);
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server)
 		return tlsv1_server_resumed(conn->server);
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	return -1;
 }


 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
 				   u8 *ciphers)
 {
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (conn->client)
 		return tlsv1_client_set_cipher_list(conn->client, ciphers);
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server)
 		return tlsv1_server_set_cipher_list(conn->server, ciphers);
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	return -1;
 }


 int tls_get_version(void *ssl_ctx, struct tls_connection *conn,
 		    char *buf, size_t buflen)
 {
 	if (conn == NULL)
 		return -1;
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (conn->client)
 		return tlsv1_client_get_version(conn->client, buf, buflen);
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 	return -1;
 }


 int tls_get_cipher(void *tls_ctx, struct tls_connection *conn,
 		   char *buf, size_t buflen)
 {
 	if (conn == NULL)
 		return -1;
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (conn->client)
 		return tlsv1_client_get_cipher(conn->client, buf, buflen);
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server)
 		return tlsv1_server_get_cipher(conn->server, buf, buflen);
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	return -1;
 }


 int tls_connection_enable_workaround(void *tls_ctx,
 				     struct tls_connection *conn)
 {
 	return -1;
 }


 int tls_connection_client_hello_ext(void *tls_ctx, struct tls_connection *conn,
 				    int ext_type, const u8 *data,
 				    size_t data_len)
 {
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (conn->client) {
 		return tlsv1_client_hello_ext(conn->client, ext_type,
 					      data, data_len);
 	}
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 	return -1;
 }


 int tls_connection_get_failed(void *tls_ctx, struct tls_connection *conn)
 {
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server)
 		return tlsv1_server_get_failed(conn->server);
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	return 0;
 }


 int tls_connection_get_read_alerts(void *tls_ctx, struct tls_connection *conn)
 {
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server)
 		return tlsv1_server_get_read_alerts(conn->server);
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	return 0;
 }


 int tls_connection_get_write_alerts(void *tls_ctx,
 				    struct tls_connection *conn)
 {
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server)
 		return tlsv1_server_get_write_alerts(conn->server);
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	return 0;
 }


 int tls_connection_set_session_ticket_cb(void *tls_ctx,
 					 struct tls_connection *conn,
 					 tls_session_ticket_cb cb,
 					 void *ctx)
 {
 #ifdef CONFIG_TLS_INTERNAL_CLIENT
 	if (conn->client) {
 		tlsv1_client_set_session_ticket_cb(conn->client, cb, ctx);
 		return 0;
 	}
 #endif /* CONFIG_TLS_INTERNAL_CLIENT */
 #ifdef CONFIG_TLS_INTERNAL_SERVER
 	if (conn->server) {
 		tlsv1_server_set_session_ticket_cb(conn->server, cb, ctx);
 		return 0;
 	}
 #endif /* CONFIG_TLS_INTERNAL_SERVER */
 	return -1;
 }


 int tls_get_library_version(char *buf, size_t buf_len)
 {
 	return os_snprintf(buf, buf_len, "internal");
 }


 void tls_connection_set_success_data(struct tls_connection *conn,
 				     struct wpabuf *data)
 {
 	wpabuf_free(data);
 }


 void tls_connection_set_success_data_resumed(struct tls_connection *conn)
 {
 }


 const struct wpabuf *
 tls_connection_get_success_data(struct tls_connection *conn)
 {
 	return NULL;
 }


 void tls_connection_remove_session(struct tls_connection *conn)
 {
 }
	/*
	* TLS interface functions and an internal TLS implementation
	* Copyright (c) 2004-2019, Jouni Malinen <j@w1.fi>
	*
	* This software may be distributed under the terms of the BSD license.
	* See README for more details.
	*
	* This file interface functions for hostapd/wpa_supplicant to use the
	* integrated TLSv1 implementation.
	*/

	#include "includes.h"

	#include "common.h"
	#include "tls.h"
	#include "tls/tlsv1_client.h"
	#include "tls/tlsv1_server.h"


	static int tls_ref_count = 0;

	struct tls_global {
	int server;
	struct tlsv1_credentials *server_cred;
	int check_crl;

	void (event_cb)(void ctx, enum tls_event ev,
	union tls_event_data *data);
	void *cb_ctx;
	int cert_in_cb;
	};

	struct tls_connection {
	struct tlsv1_client *client;
	struct tlsv1_server *server;
	struct tls_global *global;
	};


	void * tls_init(const struct tls_config *conf)
	{
	struct tls_global *global;

	if (tls_ref_count == 0) {
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (tlsv1_client_global_init())
	return NULL;
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (tlsv1_server_global_init())
	return NULL;
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	}
	tls_ref_count++;

	global = os_zalloc(sizeof(*global));
	if (global == NULL)
	return NULL;
	if (conf) {
	global->event_cb = conf->event_cb;
	global->cb_ctx = conf->cb_ctx;
	global->cert_in_cb = conf->cert_in_cb;
	}

	return global;
	}

	void tls_deinit(void *ssl_ctx)
	{
	struct tls_global *global = ssl_ctx;
	tls_ref_count--;
	if (tls_ref_count == 0) {
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	tlsv1_client_global_deinit();
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	tlsv1_server_global_deinit();
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	}
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	tlsv1_cred_free(global->server_cred);
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	os_free(global);
	}


	int tls_get_errors(void *tls_ctx)
	{
	return 0;
	}


	struct tls_connection * tls_connection_init(void *tls_ctx)
	{
	struct tls_connection *conn;
	struct tls_global *global = tls_ctx;

	conn = os_zalloc(sizeof(*conn));
	if (conn == NULL)
	return NULL;
	conn->global = global;

	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (!global->server) {
	conn->client = tlsv1_client_init();
	if (conn->client == NULL) {
	os_free(conn);
	return NULL;
	}
	tlsv1_client_set_cb(conn->client, global->event_cb,
	global->cb_ctx, global->cert_in_cb);
	}
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (global->server) {
	conn->server = tlsv1_server_init(global->server_cred);
	if (conn->server == NULL) {
	os_free(conn);
	return NULL;
	}
	}
	#endif /* CONFIG_TLS_INTERNAL_SERVER */

	return conn;
	}


	#ifdef CONFIG_TESTING_OPTIONS
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	void tls_connection_set_test_flags(struct tls_connection *conn, u32 flags)
	{
	if (conn->server)
	tlsv1_server_set_test_flags(conn->server, flags);
	}
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	#endif /* CONFIG_TESTING_OPTIONS */


	void tls_connection_set_log_cb(struct tls_connection *conn,
	void (log_cb)(void ctx, const char *msg),
	void *ctx)
	{
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server)
	tlsv1_server_set_log_cb(conn->server, log_cb, ctx);
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	}


	void tls_connection_deinit(void tls_ctx, struct tls_connection conn)
	{
	if (conn == NULL)
	return;
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (conn->client)
	tlsv1_client_deinit(conn->client);
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server)
	tlsv1_server_deinit(conn->server);
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	os_free(conn);
	}


	int tls_connection_established(void tls_ctx, struct tls_connection conn)
	{
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (conn->client)
	return tlsv1_client_established(conn->client);
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server)
	return tlsv1_server_established(conn->server);
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	return 0;
	}


	char * tls_connection_peer_serial_num(void *tls_ctx,
	struct tls_connection *conn)
	{
	/* TODO */
	return NULL;
	}


	int tls_connection_shutdown(void tls_ctx, struct tls_connection conn)
	{
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (conn->client)
	return tlsv1_client_shutdown(conn->client);
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server)
	return tlsv1_server_shutdown(conn->server);
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	return -1;
	}


	int tls_connection_set_params(void tls_ctx, struct tls_connection conn,
	const struct tls_connection_params *params)
	{
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	struct tlsv1_credentials *cred;

	if (conn->client == NULL)
	return -1;

	if (params->flags & TLS_CONN_EXT_CERT_CHECK) {
	wpa_printf(MSG_INFO,
	"TLS: tls_ext_cert_check=1 not supported");
	return -1;
	}

	cred = tlsv1_cred_alloc();
	if (cred == NULL)
	return -1;

	if (params->subject_match) {
	wpa_printf(MSG_INFO, "TLS: subject_match not supported");
	tlsv1_cred_free(cred);
	return -1;
	}

	if (params->altsubject_match) {
	wpa_printf(MSG_INFO, "TLS: altsubject_match not supported");
	tlsv1_cred_free(cred);
	return -1;
	}

	if (params->suffix_match) {
	wpa_printf(MSG_INFO, "TLS: suffix_match not supported");
	tlsv1_cred_free(cred);
	return -1;
	}

	if (params->domain_match) {
	wpa_printf(MSG_INFO, "TLS: domain_match not supported");
	tlsv1_cred_free(cred);
	return -1;
	}

	if (params->openssl_ciphers) {
	wpa_printf(MSG_INFO, "TLS: openssl_ciphers not supported");
	tlsv1_cred_free(cred);
	return -1;
	}

	if (params->openssl_ecdh_curves) {
	wpa_printf(MSG_INFO, "TLS: openssl_ecdh_curves not supported");
	tlsv1_cred_free(cred);
	return -1;
	}

	if (tlsv1_set_ca_cert(cred, params->ca_cert,
	params->ca_cert_blob, params->ca_cert_blob_len,
	params->ca_path)) {
	wpa_printf(MSG_INFO, "TLS: Failed to configure trusted CA "
	"certificates");
	tlsv1_cred_free(cred);
	return -1;
	}

	if (tlsv1_set_cert(cred, params->client_cert,
	params->client_cert_blob,
	params->client_cert_blob_len)) {
	wpa_printf(MSG_INFO, "TLS: Failed to configure client "
	"certificate");
	tlsv1_cred_free(cred);
	return -1;
	}

	if (tlsv1_set_private_key(cred, params->private_key,
	params->private_key_passwd,
	params->private_key_blob,
	params->private_key_blob_len)) {
	wpa_printf(MSG_INFO, "TLS: Failed to load private key");
	tlsv1_cred_free(cred);
	return -1;
	}

	if (tlsv1_client_set_cred(conn->client, cred) < 0) {
	tlsv1_cred_free(cred);
	return -1;
	}

	tlsv1_client_set_flags(conn->client, params->flags);

	return 0;
	#else /* CONFIG_TLS_INTERNAL_CLIENT */
	return -1;
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	}


	int tls_global_set_params(void *tls_ctx,
	const struct tls_connection_params *params)
	{
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	struct tls_global *global = tls_ctx;
	struct tlsv1_credentials *cred;

	if (params->check_cert_subject)
	return -1; /* not yet supported */

	/* Currently, global parameters are only set when running in server
	* mode. */
	global->server = 1;
	tlsv1_cred_free(global->server_cred);
	global->server_cred = cred = tlsv1_cred_alloc();
	if (cred == NULL)
	return -1;

	if (tlsv1_set_ca_cert(cred, params->ca_cert, params->ca_cert_blob,
	params->ca_cert_blob_len, params->ca_path)) {
	wpa_printf(MSG_INFO, "TLS: Failed to configure trusted CA "
	"certificates");
	return -1;
	}

	if (tlsv1_set_cert(cred, params->client_cert, params->client_cert_blob,
	params->client_cert_blob_len)) {
	wpa_printf(MSG_INFO, "TLS: Failed to configure server "
	"certificate");
	return -1;
	}

	if (tlsv1_set_private_key(cred, params->private_key,
	params->private_key_passwd,
	params->private_key_blob,
	params->private_key_blob_len)) {
	wpa_printf(MSG_INFO, "TLS: Failed to load private key");
	return -1;
	}

	if (tlsv1_set_dhparams(cred, params->dh_file, NULL, 0)) {
	wpa_printf(MSG_INFO, "TLS: Failed to load DH parameters");
	return -1;
	}

	if (params->ocsp_stapling_response)
	cred->ocsp_stapling_response =
	os_strdup(params->ocsp_stapling_response);
	if (params->ocsp_stapling_response_multi)
	cred->ocsp_stapling_response_multi =
	os_strdup(params->ocsp_stapling_response_multi);

	return 0;
	#else /* CONFIG_TLS_INTERNAL_SERVER */
	return -1;
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	}


	int tls_global_set_verify(void *tls_ctx, int check_crl, int strict)
	{
	struct tls_global *global = tls_ctx;
	global->check_crl = check_crl;
	return 0;
	}


	int tls_connection_set_verify(void tls_ctx, struct tls_connection conn,
	int verify_peer, unsigned int flags,
	const u8 *session_ctx, size_t session_ctx_len)
	{
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server)
	return tlsv1_server_set_verify(conn->server, verify_peer);
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	return -1;
	}


	int tls_connection_get_random(void tls_ctx, struct tls_connection conn,
	struct tls_random *data)
	{
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (conn->client)
	return tlsv1_client_get_random(conn->client, data);
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server)
	return tlsv1_server_get_random(conn->server, data);
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	return -1;
	}


	static int tls_get_keyblock_size(struct tls_connection *conn)
	{
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (conn->client)
	return tlsv1_client_get_keyblock_size(conn->client);
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server)
	return tlsv1_server_get_keyblock_size(conn->server);
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	return -1;
	}


	static int tls_connection_prf(void tls_ctx, struct tls_connection conn,
	const char label, const u8 context,
	size_t context_len, int server_random_first,
	int skip_keyblock, u8 *out, size_t out_len)
	{
	int ret = -1, skip = 0;
	u8 *tmp_out = NULL;
	u8 *_out = out;

	if (skip_keyblock) {
	skip = tls_get_keyblock_size(conn);
	if (skip < 0)
	return -1;
	tmp_out = os_malloc(skip + out_len);
	if (!tmp_out)
	return -1;
	_out = tmp_out;
	}

	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (conn->client) {
	ret = tlsv1_client_prf(conn->client, label, context,
	context_len, server_random_first,
	_out, skip + out_len);
	}
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server) {
	ret = tlsv1_server_prf(conn->server, label, context,
	context_len, server_random_first,
	_out, skip + out_len);
	}
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	if (ret == 0 && skip_keyblock)
	os_memcpy(out, _out + skip, out_len);
	bin_clear_free(tmp_out, skip);

	return ret;
	}


	int tls_connection_export_key(void tls_ctx, struct tls_connection conn,
	const char label, const u8 context,
	size_t context_len, u8 *out, size_t out_len)
	{
	return tls_connection_prf(tls_ctx, conn, label, context, context_len,
	0, 0, out, out_len);
	}


	int tls_connection_get_eap_fast_key(void tls_ctx, struct tls_connection conn,
	u8 *out, size_t out_len)
	{
	return tls_connection_prf(tls_ctx, conn, "key expansion", NULL, 0,
	1, 1, out, out_len);
	}


	struct wpabuf * tls_connection_handshake(void *tls_ctx,
	struct tls_connection *conn,
	const struct wpabuf *in_data,
	struct wpabuf **appl_data)
	{
	return tls_connection_handshake2(tls_ctx, conn, in_data, appl_data,
	NULL);
	}


	struct wpabuf * tls_connection_handshake2(void *tls_ctx,
	struct tls_connection *conn,
	const struct wpabuf *in_data,
	struct wpabuf **appl_data,
	int *need_more_data)
	{
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	u8 res, ad;
	size_t res_len, ad_len;
	struct wpabuf *out;

	if (conn->client == NULL)
	return NULL;

	ad = NULL;
	res = tlsv1_client_handshake(conn->client,
	in_data ? wpabuf_head(in_data) : NULL,
	in_data ? wpabuf_len(in_data) : 0,
	&res_len, &ad, &ad_len, need_more_data);
	if (res == NULL)
	return NULL;
	out = wpabuf_alloc_ext_data(res, res_len);
	if (out == NULL) {
	os_free(res);
	os_free(ad);
	return NULL;
	}
	if (appl_data) {
	if (ad) {
	*appl_data = wpabuf_alloc_ext_data(ad, ad_len);
	if (*appl_data == NULL)
	os_free(ad);
	} else
	*appl_data = NULL;
	} else
	os_free(ad);

	return out;
	#else /* CONFIG_TLS_INTERNAL_CLIENT */
	return NULL;
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	}


	struct wpabuf * tls_connection_server_handshake(void *tls_ctx,
	struct tls_connection *conn,
	const struct wpabuf *in_data,
	struct wpabuf **appl_data)
	{
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	u8 *res;
	size_t res_len;
	struct wpabuf *out;

	if (conn->server == NULL)
	return NULL;

	if (appl_data)
	*appl_data = NULL;

	res = tlsv1_server_handshake(conn->server, wpabuf_head(in_data),
	wpabuf_len(in_data), &res_len);
	if (res == NULL && tlsv1_server_established(conn->server))
	return wpabuf_alloc(0);
	if (res == NULL)
	return NULL;
	out = wpabuf_alloc_ext_data(res, res_len);
	if (out == NULL) {
	os_free(res);
	return NULL;
	}

	return out;
	#else /* CONFIG_TLS_INTERNAL_SERVER */
	return NULL;
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	}


	struct wpabuf * tls_connection_encrypt(void *tls_ctx,
	struct tls_connection *conn,
	const struct wpabuf *in_data)
	{
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (conn->client) {
	struct wpabuf *buf;
	int res;
	buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
	if (buf == NULL)
	return NULL;
	res = tlsv1_client_encrypt(conn->client, wpabuf_head(in_data),
	wpabuf_len(in_data),
	wpabuf_mhead(buf),
	wpabuf_size(buf));
	if (res < 0) {
	wpabuf_free(buf);
	return NULL;
	}
	wpabuf_put(buf, res);
	return buf;
	}
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server) {
	struct wpabuf *buf;
	int res;
	buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
	if (buf == NULL)
	return NULL;
	res = tlsv1_server_encrypt(conn->server, wpabuf_head(in_data),
	wpabuf_len(in_data),
	wpabuf_mhead(buf),
	wpabuf_size(buf));
	if (res < 0) {
	wpabuf_free(buf);
	return NULL;
	}
	wpabuf_put(buf, res);
	return buf;
	}
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	return NULL;
	}


	struct wpabuf * tls_connection_decrypt(void *tls_ctx,
	struct tls_connection *conn,
	const struct wpabuf *in_data)
	{
	return tls_connection_decrypt2(tls_ctx, conn, in_data, NULL);
	}


	struct wpabuf * tls_connection_decrypt2(void *tls_ctx,
	struct tls_connection *conn,
	const struct wpabuf *in_data,
	int *need_more_data)
	{
	if (need_more_data)
	*need_more_data = 0;

	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (conn->client) {
	return tlsv1_client_decrypt(conn->client, wpabuf_head(in_data),
	wpabuf_len(in_data),
	need_more_data);
	}
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server) {
	struct wpabuf *buf;
	int res;
	buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3);
	if (buf == NULL)
	return NULL;
	res = tlsv1_server_decrypt(conn->server, wpabuf_head(in_data),
	wpabuf_len(in_data),
	wpabuf_mhead(buf),
	wpabuf_size(buf));
	if (res < 0) {
	wpabuf_free(buf);
	return NULL;
	}
	wpabuf_put(buf, res);
	return buf;
	}
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	return NULL;
	}


	int tls_connection_resumed(void tls_ctx, struct tls_connection conn)
	{
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (conn->client)
	return tlsv1_client_resumed(conn->client);
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server)
	return tlsv1_server_resumed(conn->server);
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	return -1;
	}


	int tls_connection_set_cipher_list(void tls_ctx, struct tls_connection conn,
	u8 *ciphers)
	{
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (conn->client)
	return tlsv1_client_set_cipher_list(conn->client, ciphers);
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server)
	return tlsv1_server_set_cipher_list(conn->server, ciphers);
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	return -1;
	}


	int tls_get_version(void ssl_ctx, struct tls_connection conn,
	char *buf, size_t buflen)
	{
	if (conn == NULL)
	return -1;
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (conn->client)
	return tlsv1_client_get_version(conn->client, buf, buflen);
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	return -1;
	}


	int tls_get_cipher(void tls_ctx, struct tls_connection conn,
	char *buf, size_t buflen)
	{
	if (conn == NULL)
	return -1;
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (conn->client)
	return tlsv1_client_get_cipher(conn->client, buf, buflen);
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server)
	return tlsv1_server_get_cipher(conn->server, buf, buflen);
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	return -1;
	}


	int tls_connection_enable_workaround(void *tls_ctx,
	struct tls_connection *conn)
	{
	return -1;
	}


	int tls_connection_client_hello_ext(void tls_ctx, struct tls_connection conn,
	int ext_type, const u8 *data,
	size_t data_len)
	{
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (conn->client) {
	return tlsv1_client_hello_ext(conn->client, ext_type,
	data, data_len);
	}
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	return -1;
	}


	int tls_connection_get_failed(void tls_ctx, struct tls_connection conn)
	{
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server)
	return tlsv1_server_get_failed(conn->server);
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	return 0;
	}


	int tls_connection_get_read_alerts(void tls_ctx, struct tls_connection conn)
	{
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server)
	return tlsv1_server_get_read_alerts(conn->server);
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	return 0;
	}


	int tls_connection_get_write_alerts(void *tls_ctx,
	struct tls_connection *conn)
	{
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server)
	return tlsv1_server_get_write_alerts(conn->server);
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	return 0;
	}


	int tls_connection_set_session_ticket_cb(void *tls_ctx,
	struct tls_connection *conn,
	tls_session_ticket_cb cb,
	void *ctx)
	{
	#ifdef CONFIG_TLS_INTERNAL_CLIENT
	if (conn->client) {
	tlsv1_client_set_session_ticket_cb(conn->client, cb, ctx);
	return 0;
	}
	#endif /* CONFIG_TLS_INTERNAL_CLIENT */
	#ifdef CONFIG_TLS_INTERNAL_SERVER
	if (conn->server) {
	tlsv1_server_set_session_ticket_cb(conn->server, cb, ctx);
	return 0;
	}
	#endif /* CONFIG_TLS_INTERNAL_SERVER */
	return -1;
	}


	int tls_get_library_version(char *buf, size_t buf_len)
	{
	return os_snprintf(buf, buf_len, "internal");
	}


	void tls_connection_set_success_data(struct tls_connection *conn,
	struct wpabuf *data)
	{
	wpabuf_free(data);
	}


	void tls_connection_set_success_data_resumed(struct tls_connection *conn)
	{
	}


	const struct wpabuf *
	tls_connection_get_success_data(struct tls_connection *conn)
	{
	return NULL;
	}


	void tls_connection_remove_session(struct tls_connection *conn)
	{
	}