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/*
* ngtcp2
*
* Copyright (c) 2020 ngtcp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "tls_client_context_openssl.h"
#include <iostream>
#include <fstream>
#include <limits>
#include <ngtcp2/ngtcp2_crypto_openssl.h>
#include <openssl/err.h>
#include "client_base.h"
#include "template.h"
extern Config config;
TLSClientContext::TLSClientContext() : ssl_ctx_{nullptr} {}
TLSClientContext::~TLSClientContext() {
if (ssl_ctx_) {
SSL_CTX_free(ssl_ctx_);
}
}
SSL_CTX *TLSClientContext::get_native_handle() const { return ssl_ctx_; }
namespace {
int new_session_cb(SSL *ssl, SSL_SESSION *session) {
if (SSL_SESSION_get_max_early_data(session) !=
std::numeric_limits<uint32_t>::max()) {
std::cerr << "max_early_data_size is not 0xffffffff" << std::endl;
}
auto f = BIO_new_file(config.session_file, "w");
if (f == nullptr) {
std::cerr << "Could not write TLS session in " << config.session_file
<< std::endl;
return 0;
}
if (!PEM_write_bio_SSL_SESSION(f, session)) {
std::cerr << "Unable to write TLS session to file" << std::endl;
}
BIO_free(f);
return 0;
}
} // namespace
int TLSClientContext::init(const char *private_key_file,
const char *cert_file) {
ssl_ctx_ = SSL_CTX_new(TLS_client_method());
if (!ssl_ctx_) {
std::cerr << "SSL_CTX_new: " << ERR_error_string(ERR_get_error(), nullptr)
<< std::endl;
return -1;
}
if (ngtcp2_crypto_openssl_configure_client_context(ssl_ctx_) != 0) {
std::cerr << "ngtcp2_crypto_openssl_configure_client_context failed"
<< std::endl;
return -1;
}
SSL_CTX_set_default_verify_paths(ssl_ctx_);
if (SSL_CTX_set_ciphersuites(ssl_ctx_, config.ciphers) != 1) {
std::cerr << "SSL_CTX_set_ciphersuites: "
<< ERR_error_string(ERR_get_error(), nullptr) << std::endl;
return -1;
}
if (SSL_CTX_set1_groups_list(ssl_ctx_, config.groups) != 1) {
std::cerr << "SSL_CTX_set1_groups_list failed" << std::endl;
return -1;
}
if (private_key_file && cert_file) {
if (SSL_CTX_use_PrivateKey_file(ssl_ctx_, private_key_file,
SSL_FILETYPE_PEM) != 1) {
std::cerr << "SSL_CTX_use_PrivateKey_file: "
<< ERR_error_string(ERR_get_error(), nullptr) << std::endl;
return -1;
}
if (SSL_CTX_use_certificate_chain_file(ssl_ctx_, cert_file) != 1) {
std::cerr << "SSL_CTX_use_certificate_chain_file: "
<< ERR_error_string(ERR_get_error(), nullptr) << std::endl;
return -1;
}
}
if (config.session_file) {
SSL_CTX_set_session_cache_mode(ssl_ctx_, SSL_SESS_CACHE_CLIENT |
SSL_SESS_CACHE_NO_INTERNAL);
SSL_CTX_sess_set_new_cb(ssl_ctx_, new_session_cb);
}
return 0;
}
extern std::ofstream keylog_file;
namespace {
void keylog_callback(const SSL *ssl, const char *line) {
keylog_file.write(line, strlen(line));
keylog_file.put('\n');
keylog_file.flush();
}
} // namespace
void TLSClientContext::enable_keylog() {
SSL_CTX_set_keylog_callback(ssl_ctx_, keylog_callback);
}
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