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/*
* ngtcp2
*
* Copyright (c) 2022 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_picotls.h"
#include <iostream>
#include <ngtcp2/ngtcp2_crypto_picotls.h>
#include <openssl/bio.h>
#include <openssl/pem.h>
#include "client_base.h"
#include "template.h"
extern Config config;
namespace {
int save_ticket_cb(ptls_save_ticket_t *self, ptls_t *ptls, ptls_iovec_t input) {
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(f, "PICOTLS SESSION PARAMETERS", "", input.base,
input.len)) {
std::cerr << "Unable to write TLS session to file" << std::endl;
}
BIO_free(f);
return 0;
}
ptls_save_ticket_t save_ticket = {save_ticket_cb};
} // namespace
namespace {
ptls_key_exchange_algorithm_t *key_exchanges[] = {
&ptls_openssl_x25519,
&ptls_openssl_secp256r1,
&ptls_openssl_secp384r1,
&ptls_openssl_secp521r1,
nullptr,
};
} // namespace
namespace {
ptls_cipher_suite_t *cipher_suites[] = {
&ptls_openssl_aes128gcmsha256,
&ptls_openssl_aes256gcmsha384,
&ptls_openssl_chacha20poly1305sha256,
nullptr,
};
} // namespace
TLSClientContext::TLSClientContext()
: ctx_{
.random_bytes = ptls_openssl_random_bytes,
.get_time = &ptls_get_time,
.key_exchanges = key_exchanges,
.cipher_suites = cipher_suites,
.require_dhe_on_psk = 1,
} {}
TLSClientContext::~TLSClientContext() {
if (sign_cert_.key) {
ptls_openssl_dispose_sign_certificate(&sign_cert_);
}
for (size_t i = 0; i < ctx_.certificates.count; ++i) {
free(ctx_.certificates.list[i].base);
}
free(ctx_.certificates.list);
}
ptls_context_t *TLSClientContext::get_native_handle() { return &ctx_; }
int TLSClientContext::init(const char *private_key_file,
const char *cert_file) {
if (ngtcp2_crypto_picotls_configure_client_context(&ctx_) != 0) {
std::cerr << "ngtcp2_crypto_picotls_configure_client_context failed"
<< std::endl;
return -1;
}
if (config.session_file) {
ctx_.save_ticket = &save_ticket;
}
if (private_key_file && cert_file) {
if (ptls_load_certificates(&ctx_, cert_file) != 0) {
std::cerr << "ptls_load_certificates failed" << std::endl;
return -1;
}
if (load_private_key(private_key_file) != 0) {
return -1;
}
}
return 0;
}
int TLSClientContext::load_private_key(const char *private_key_file) {
auto fp = fopen(private_key_file, "rb");
if (fp == nullptr) {
std::cerr << "Could not open private key file " << private_key_file << ": "
<< strerror(errno) << std::endl;
return -1;
}
auto fp_d = defer(fclose, fp);
auto pkey = PEM_read_PrivateKey(fp, nullptr, nullptr, nullptr);
if (pkey == nullptr) {
std::cerr << "Could not read private key file " << private_key_file
<< std::endl;
return -1;
}
auto pkey_d = defer(EVP_PKEY_free, pkey);
if (ptls_openssl_init_sign_certificate(&sign_cert_, pkey) != 0) {
std::cerr << "ptls_openssl_init_sign_certificate failed" << std::endl;
return -1;
}
ctx_.sign_certificate = &sign_cert_.super;
return 0;
}
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