/*
 * ngtcp2
 *
 * Copyright (c) 2025 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_ossl.h"

#include <array>

#include "util.h"
#include "template.h"

using namespace ngtcp2;
using namespace std::literals;

TLSSessionBase::TLSSessionBase() {
  ngtcp2_crypto_ossl_ctx_new(&ossl_ctx_, nullptr);
}

TLSSessionBase::~TLSSessionBase() {
  auto ssl = ngtcp2_crypto_ossl_ctx_get_ssl(ossl_ctx_);

  if (ssl) {
    SSL_set_app_data(ssl, nullptr);
    SSL_free(ssl);
  }

  ngtcp2_crypto_ossl_ctx_del(ossl_ctx_);
}

ngtcp2_crypto_ossl_ctx *TLSSessionBase::get_native_handle() const {
  return ossl_ctx_;
}

std::string TLSSessionBase::get_cipher_name() const {
  return SSL_get_cipher_name(ngtcp2_crypto_ossl_ctx_get_ssl(ossl_ctx_));
}

std::string_view TLSSessionBase::get_negotiated_group() const {
  auto ssl = ngtcp2_crypto_ossl_ctx_get_ssl(ossl_ctx_);
  auto name = SSL_get0_group_name(ssl);

  if (!name) {
    return ""sv;
  }

  return name;
}

std::string TLSSessionBase::get_selected_alpn() const {
  auto ssl = ngtcp2_crypto_ossl_ctx_get_ssl(ossl_ctx_);
  const unsigned char *alpn = nullptr;
  unsigned int alpnlen;

  SSL_get0_alpn_selected(ssl, &alpn, &alpnlen);

  return std::string{alpn, alpn + alpnlen};
}