/* Copyright (c) 2018, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#include "settings_writer.h"
#include <stdio.h>
#include <openssl/ssl.h>
#include "fuzzer_tags.h"
#include "test_config.h"
SettingsWriter::SettingsWriter() {}
bool SettingsWriter::Init(int i, const TestConfig *config,
SSL_SESSION *session) {
if (config->write_settings.empty()) {
return true;
}
// Treat write_settings as a path prefix for each connection in the run.
char buf[DECIMAL_SIZE(int)];
snprintf(buf, sizeof(buf), "%d", i);
path_ = config->write_settings + buf;
if (!CBB_init(cbb_.get(), 64)) {
return false;
}
if (session != nullptr) {
uint8_t *data;
size_t len;
if (!SSL_SESSION_to_bytes(session, &data, &len)) {
return false;
}
bssl::UniquePtr<uint8_t> free_data(data);
CBB child;
if (!CBB_add_u16(cbb_.get(), kSessionTag) ||
!CBB_add_u24_length_prefixed(cbb_.get(), &child) ||
!CBB_add_bytes(&child, data, len) || !CBB_flush(cbb_.get())) {
return false;
}
}
if (config->is_server &&
(config->require_any_client_certificate || config->verify_peer) &&
!CBB_add_u16(cbb_.get(), kRequestClientCert)) {
return false;
}
return true;
}
bool SettingsWriter::Commit() {
if (path_.empty()) {
return true;
}
uint8_t *settings;
size_t settings_len;
if (!CBB_add_u16(cbb_.get(), kDataTag) ||
!CBB_finish(cbb_.get(), &settings, &settings_len)) {
return false;
}
bssl::UniquePtr<uint8_t> free_settings(settings);
using ScopedFILE = std::unique_ptr<FILE, decltype(&fclose)>;
ScopedFILE file(fopen(path_.c_str(), "w"), fclose);
if (!file) {
return false;
}
return fwrite(settings, settings_len, 1, file.get()) == 1;
}
bool SettingsWriter::WriteHandoff(bssl::Span<const uint8_t> handoff) {
if (path_.empty()) {
return true;
}
CBB child;
if (!CBB_add_u16(cbb_.get(), kHandoffTag) ||
!CBB_add_u24_length_prefixed(cbb_.get(), &child) ||
!CBB_add_bytes(&child, handoff.data(), handoff.size()) ||
!CBB_flush(cbb_.get())) {
return false;
}
return true;
}
bool SettingsWriter::WriteHandback(bssl::Span<const uint8_t> handback) {
if (path_.empty()) {
return true;
}
CBB child;
if (!CBB_add_u16(cbb_.get(), kHandbackTag) ||
!CBB_add_u24_length_prefixed(cbb_.get(), &child) ||
!CBB_add_bytes(&child, handback.data(), handback.size()) ||
!CBB_flush(cbb_.get())) {
return false;
}
return true;
}