mirror of
https://github.com/godotengine/godot.git
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326 lines
8.6 KiB
C++
Executable File
326 lines
8.6 KiB
C++
Executable File
/*************************************************************************/
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/* stream_peer_openssl.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "stream_peer_mbed_tls.h"
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static void my_debug(void *ctx, int level,
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const char *file, int line,
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const char *str) {
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printf("%s:%04d: %s", file, line, str);
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fflush(stdout);
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}
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void _print_error(int ret) {
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printf("mbedtls error: returned -0x%x\n\n", -ret);
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fflush(stdout);
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}
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int StreamPeerMbedTLS::bio_send(void *ctx, const unsigned char *buf, size_t len) {
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if (buf == NULL || len <= 0) return 0;
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StreamPeerMbedTLS *sp = (StreamPeerMbedTLS *)ctx;
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ERR_FAIL_COND_V(sp == NULL, 0);
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int sent;
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Error err = sp->base->put_partial_data((const uint8_t *)buf, len, sent);
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if (err != OK) {
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return MBEDTLS_ERR_SSL_INTERNAL_ERROR;
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}
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if (sent == 0) {
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return MBEDTLS_ERR_SSL_WANT_WRITE;
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}
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return sent;
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}
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int StreamPeerMbedTLS::bio_recv(void *ctx, unsigned char *buf, size_t len) {
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if (buf == NULL || len <= 0) return 0;
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StreamPeerMbedTLS *sp = (StreamPeerMbedTLS *)ctx;
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ERR_FAIL_COND_V(sp == NULL, 0);
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int got;
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Error err = sp->base->get_partial_data((uint8_t *)buf, len, got);
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if (err != OK) {
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return MBEDTLS_ERR_SSL_INTERNAL_ERROR;
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}
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if (got == 0) {
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return MBEDTLS_ERR_SSL_WANT_READ;
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}
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return got;
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}
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Error StreamPeerMbedTLS::connect_to_stream(Ref<StreamPeer> p_base, bool p_validate_certs, const String &p_for_hostname) {
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base = p_base;
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int ret = 0;
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int authmode = p_validate_certs ? MBEDTLS_SSL_VERIFY_REQUIRED : MBEDTLS_SSL_VERIFY_NONE;
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mbedtls_ssl_init(&ssl);
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mbedtls_ssl_config_init(&conf);
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mbedtls_ctr_drbg_init(&ctr_drbg);
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mbedtls_entropy_init(&entropy);
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ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy, NULL, 0);
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if (ret != 0) {
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ERR_PRINTS(" failed\n ! mbedtls_ctr_drbg_seed returned an error" + itos(ret));
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return FAILED;
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}
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mbedtls_ssl_config_defaults(&conf,
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MBEDTLS_SSL_IS_CLIENT,
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MBEDTLS_SSL_TRANSPORT_STREAM,
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MBEDTLS_SSL_PRESET_DEFAULT);
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mbedtls_ssl_conf_authmode(&conf, authmode);
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mbedtls_ssl_conf_ca_chain(&conf, &cacert, NULL);
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mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg);
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mbedtls_ssl_conf_dbg(&conf, my_debug, stdout);
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mbedtls_ssl_setup(&ssl, &conf);
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mbedtls_ssl_set_hostname(&ssl, p_for_hostname.utf8().get_data());
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mbedtls_ssl_set_bio(&ssl, this, bio_send, bio_recv, NULL);
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while ((ret = mbedtls_ssl_handshake(&ssl)) != 0) {
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if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
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ERR_PRINTS("TLS handshake error: " + itos(ret));
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_print_error(ret);
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status = STATUS_ERROR_HOSTNAME_MISMATCH;
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return FAILED;
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}
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}
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connected = true;
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status = STATUS_CONNECTED;
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return OK;
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}
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Error StreamPeerMbedTLS::accept_stream(Ref<StreamPeer> p_base) {
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return ERR_UNAVAILABLE;
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}
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Error StreamPeerMbedTLS::put_data(const uint8_t *p_data, int p_bytes) {
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ERR_FAIL_COND_V(!connected, ERR_UNCONFIGURED);
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Error err;
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int sent = 0;
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while (p_bytes > 0) {
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err = put_partial_data(p_data, p_bytes, sent);
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if (err != OK) {
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return err;
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}
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p_data += sent;
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p_bytes -= sent;
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}
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return OK;
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}
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Error StreamPeerMbedTLS::put_partial_data(const uint8_t *p_data, int p_bytes, int &r_sent) {
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ERR_FAIL_COND_V(!connected, ERR_UNCONFIGURED);
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r_sent = 0;
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if (p_bytes == 0)
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return OK;
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int ret = mbedtls_ssl_write(&ssl, p_data, p_bytes);
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if (ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE) {
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ret = 0; // non blocking io
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} else if (ret <= 0) {
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_print_error(ret);
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disconnect_from_stream();
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return ERR_CONNECTION_ERROR;
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}
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r_sent = ret;
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return OK;
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}
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Error StreamPeerMbedTLS::get_data(uint8_t *p_buffer, int p_bytes) {
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ERR_FAIL_COND_V(!connected, ERR_UNCONFIGURED);
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Error err;
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int got = 0;
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while (p_bytes > 0) {
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err = get_partial_data(p_buffer, p_bytes, got);
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if (err != OK) {
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return err;
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}
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p_buffer += got;
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p_bytes -= got;
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}
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return OK;
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}
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Error StreamPeerMbedTLS::get_partial_data(uint8_t *p_buffer, int p_bytes, int &r_received) {
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ERR_FAIL_COND_V(!connected, ERR_UNCONFIGURED);
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r_received = 0;
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int ret = mbedtls_ssl_read(&ssl, p_buffer, p_bytes);
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if (ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE) {
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ret = 0; // non blocking io
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} else if (ret <= 0) {
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_print_error(ret);
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disconnect_from_stream();
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return ERR_CONNECTION_ERROR;
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}
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r_received = ret;
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return OK;
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}
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void StreamPeerMbedTLS::poll() {
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ERR_FAIL_COND(!connected);
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ERR_FAIL_COND(!base.is_valid());
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int ret = mbedtls_ssl_read(&ssl, NULL, 0);
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if (ret < 0 && ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
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_print_error(ret);
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disconnect_from_stream();
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return;
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}
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}
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int StreamPeerMbedTLS::get_available_bytes() const {
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ERR_FAIL_COND_V(!connected, 0);
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return mbedtls_ssl_get_bytes_avail(&ssl);
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}
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StreamPeerMbedTLS::StreamPeerMbedTLS() {
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connected = false;
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status = STATUS_DISCONNECTED;
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}
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StreamPeerMbedTLS::~StreamPeerMbedTLS() {
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disconnect_from_stream();
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}
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void StreamPeerMbedTLS::disconnect_from_stream() {
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if (!connected)
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return;
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mbedtls_ssl_free(&ssl);
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mbedtls_ssl_config_free(&conf);
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mbedtls_ctr_drbg_free(&ctr_drbg);
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mbedtls_entropy_free(&entropy);
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base = Ref<StreamPeer>();
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connected = false;
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status = STATUS_DISCONNECTED;
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}
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StreamPeerMbedTLS::Status StreamPeerMbedTLS::get_status() const {
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return status;
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}
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StreamPeerSSL *StreamPeerMbedTLS::_create_func() {
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return memnew(StreamPeerMbedTLS);
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}
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mbedtls_x509_crt StreamPeerMbedTLS::cacert;
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void StreamPeerMbedTLS::_load_certs(const PoolByteArray &p_array) {
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int arr_len = p_array.size();
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PoolByteArray::Read r = p_array.read();
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int err = mbedtls_x509_crt_parse(&cacert, &r[0], arr_len);
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if (err != 0) {
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WARN_PRINTS("Error parsing some certificates: " + itos(err));
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}
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}
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void StreamPeerMbedTLS::initialize_ssl() {
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_create = _create_func;
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load_certs_func = _load_certs;
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mbedtls_x509_crt_init(&cacert);
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#ifdef DEBUG_ENABLED
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mbedtls_debug_set_threshold(1);
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#endif
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String certs_path = GLOBAL_DEF("network/ssl/certificates", "");
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ProjectSettings::get_singleton()->set_custom_property_info("network/ssl/certificates", PropertyInfo(Variant::STRING, "network/ssl/certificates", PROPERTY_HINT_FILE, "*.crt"));
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if (certs_path != "") {
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FileAccess *f = FileAccess::open(certs_path, FileAccess::READ);
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if (f) {
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PoolByteArray arr;
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int flen = f->get_len();
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arr.resize(flen + 1);
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{
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PoolByteArray::Write w = arr.write();
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f->get_buffer(w.ptr(), flen);
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w[flen] = 0; //end f string
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}
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memdelete(f);
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_load_certs(arr);
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print_line("Loaded certs from '" + certs_path);
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}
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}
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available = true;
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}
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void StreamPeerMbedTLS::finalize_ssl() {
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mbedtls_x509_crt_free(&cacert);
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}
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