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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_session_base_gnutls.h"
#include <fstream>
#include "util.h"
// Based on https://github.com/ueno/ngtcp2-gnutls-examples
using namespace ngtcp2;
TLSSessionBase::TLSSessionBase() : session_{nullptr} {}
TLSSessionBase::~TLSSessionBase() { gnutls_deinit(session_); }
gnutls_session_t TLSSessionBase::get_native_handle() const { return session_; }
std::string TLSSessionBase::get_cipher_name() const {
return gnutls_cipher_get_name(gnutls_cipher_get(session_));
}
std::string TLSSessionBase::get_selected_alpn() const {
gnutls_datum_t alpn;
if (auto rv = gnutls_alpn_get_selected_protocol(session_, &alpn); rv == 0) {
return std::string{alpn.data, alpn.data + alpn.size};
}
return {};
}
extern std::ofstream keylog_file;
namespace {
int keylog_callback(gnutls_session_t session, const char *label,
const gnutls_datum_t *secret) {
keylog_file.write(label, strlen(label));
keylog_file.put(' ');
gnutls_datum_t crandom;
gnutls_datum_t srandom;
gnutls_session_get_random(session, &crandom, &srandom);
if (crandom.size != 32) {
return -1;
}
auto crandom_hex =
util::format_hex(reinterpret_cast<unsigned char *>(crandom.data), 32);
keylog_file << crandom_hex << " ";
auto secret_hex = util::format_hex(
reinterpret_cast<unsigned char *>(secret->data), secret->size);
keylog_file << secret_hex << " ";
keylog_file.put('\n');
keylog_file.flush();
return 0;
}
} // namespace
void TLSSessionBase::enable_keylog() {
gnutls_session_set_keylog_function(session_, keylog_callback);
}
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