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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_wolfssl.h"
#include <iostream>
#include <fstream>
#include <limits>
#include <ngtcp2/ngtcp2_crypto_wolfssl.h>
#include <wolfssl/options.h>
#include <wolfssl/ssl.h>
#include "client_base.h"
#include "template.h"
extern Config config;
TLSClientContext::TLSClientContext() : ssl_ctx_{nullptr} {}
TLSClientContext::~TLSClientContext() {
if (ssl_ctx_) {
wolfSSL_CTX_free(ssl_ctx_);
}
}
WOLFSSL_CTX *TLSClientContext::get_native_handle() const { return ssl_ctx_; }
namespace {
int new_session_cb(WOLFSSL *ssl, WOLFSSL_SESSION *session) {
std::cerr << "new_session_cb called" << std::endl;
#ifdef HAVE_SESSION_TICKET
if (wolfSSL_SESSION_get_max_early_data(session) !=
std::numeric_limits<uint32_t>::max()) {
std::cerr << "max_early_data_size is not 0xffffffff" << std::endl;
}
unsigned char sbuffer[16 * 1024], *data;
unsigned int sz;
sz = wolfSSL_i2d_SSL_SESSION(session, nullptr);
if (sz <= 0) {
std::cerr << "Could not export TLS session in " << config.session_file
<< std::endl;
return 0;
}
if (static_cast<size_t>(sz) > sizeof(sbuffer)) {
std::cerr << "Exported TLS session too large" << std::endl;
return 0;
}
data = sbuffer;
sz = wolfSSL_i2d_SSL_SESSION(session, &data);
auto f = wolfSSL_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;
}
auto f_d = defer(wolfSSL_BIO_free, f);
if (!wolfSSL_PEM_write_bio(f, "WOLFSSL SESSION PARAMETERS", "", sbuffer,
sz)) {
std::cerr << "Unable to write TLS session to file" << std::endl;
return 0;
}
std::cerr << "new_session_cb: wrote " << sz << " of session data"
<< std::endl;
#else
std::cerr << "TLS session tickets not enabled in wolfSSL " << std::endl;
#endif
return 0;
}
} // namespace
int TLSClientContext::init(const char *private_key_file,
const char *cert_file) {
ssl_ctx_ = wolfSSL_CTX_new(wolfTLSv1_3_client_method());
if (!ssl_ctx_) {
std::cerr << "wolfSSL_CTX_new: "
<< wolfSSL_ERR_error_string(wolfSSL_ERR_get_error(), nullptr)
<< std::endl;
return -1;
}
if (ngtcp2_crypto_wolfssl_configure_client_context(ssl_ctx_) != 0) {
std::cerr << "ngtcp2_crypto_wolfssl_configure_client_context failed"
<< std::endl;
return -1;
}
if (wolfSSL_CTX_set_default_verify_paths(ssl_ctx_) ==
WOLFSSL_NOT_IMPLEMENTED) {
/* hmm, not verifying the server cert for now */
wolfSSL_CTX_set_verify(ssl_ctx_, WOLFSSL_VERIFY_NONE, 0);
}
if (wolfSSL_CTX_set_cipher_list(ssl_ctx_, config.ciphers) !=
WOLFSSL_SUCCESS) {
std::cerr << "wolfSSL_CTX_set_cipher_list: "
<< wolfSSL_ERR_error_string(wolfSSL_ERR_get_error(), nullptr)
<< std::endl;
return -1;
}
if (wolfSSL_CTX_set1_curves_list(
ssl_ctx_, const_cast<char *>(config.groups)) != WOLFSSL_SUCCESS) {
std::cerr << "wolfSSL_CTX_set1_curves_list(" << config.groups << ") failed"
<< std::endl;
return -1;
}
if (private_key_file && cert_file) {
if (wolfSSL_CTX_use_PrivateKey_file(ssl_ctx_, private_key_file,
SSL_FILETYPE_PEM) != WOLFSSL_SUCCESS) {
std::cerr << "wolfSSL_CTX_use_PrivateKey_file: "
<< wolfSSL_ERR_error_string(wolfSSL_ERR_get_error(), nullptr)
<< std::endl;
return -1;
}
if (wolfSSL_CTX_use_certificate_chain_file(ssl_ctx_, cert_file) !=
WOLFSSL_SUCCESS) {
std::cerr << "wolfSSL_CTX_use_certificate_chain_file: "
<< wolfSSL_ERR_error_string(wolfSSL_ERR_get_error(), nullptr)
<< std::endl;
return -1;
}
}
if (config.session_file) {
wolfSSL_CTX_UseSessionTicket(ssl_ctx_);
wolfSSL_CTX_sess_set_new_cb(ssl_ctx_, new_session_cb);
}
return 0;
}
extern std::ofstream keylog_file;
#ifdef HAVE_SECRET_CALLBACK
namespace {
void keylog_callback(const WOLFSSL *ssl, const char *line) {
keylog_file.write(line, strlen(line));
keylog_file.put('\n');
keylog_file.flush();
}
} // namespace
#endif
void TLSClientContext::enable_keylog() {
#ifdef HAVE_SECRET_CALLBACK
wolfSSL_CTX_set_keylog_callback(ssl_ctx_, keylog_callback);
#endif
}
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