nghttp2/src/asio_server_tls_context.cc

108 lines
3.3 KiB
C++

/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2015 Tatsuhiro Tsujikawa
*
* 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 "asio_server_tls_context.h"
#include <openssl/ssl.h>
#include <boost/asio/ssl.hpp>
#include "ssl.h"
#include "util.h"
namespace nghttp2 {
namespace asio_http2 {
namespace server {
namespace {
std::vector<unsigned char> &get_alpn_token() {
static auto alpn_token = util::get_default_alpn();
return alpn_token;
}
} // namespace
#if OPENSSL_VERSION_NUMBER >= 0x10002000L
namespace {
int alpn_select_proto_cb(SSL *ssl, const unsigned char **out,
unsigned char *outlen, const unsigned char *in,
unsigned int inlen, void *arg) {
if (!util::select_h2(out, outlen, in, inlen)) {
return SSL_TLSEXT_ERR_NOACK;
}
return SSL_TLSEXT_ERR_OK;
}
} // namespace
#endif // OPENSSL_VERSION_NUMBER >= 0x10002000L
boost::system::error_code
configure_tls_context_easy(boost::system::error_code &ec,
boost::asio::ssl::context &tls_context) {
ec.clear();
auto ctx = tls_context.native_handle();
auto ssl_opts = (SSL_OP_ALL & ~SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS) |
SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_COMPRESSION |
SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION |
SSL_OP_SINGLE_ECDH_USE | SSL_OP_NO_TICKET |
SSL_OP_CIPHER_SERVER_PREFERENCE;
SSL_CTX_set_options(ctx, ssl_opts);
SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
SSL_CTX_set_mode(ctx, SSL_MODE_RELEASE_BUFFERS);
SSL_CTX_set_cipher_list(ctx, ssl::DEFAULT_CIPHER_LIST);
#ifndef OPENSSL_NO_EC
auto ecdh = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
if (ecdh) {
SSL_CTX_set_tmp_ecdh(ctx, ecdh);
EC_KEY_free(ecdh);
}
#endif /* OPENSSL_NO_EC */
SSL_CTX_set_next_protos_advertised_cb(
ctx,
[](SSL *s, const unsigned char **data, unsigned int *len, void *arg) {
auto &token = get_alpn_token();
*data = token.data();
*len = token.size();
return SSL_TLSEXT_ERR_OK;
},
nullptr);
#if OPENSSL_VERSION_NUMBER >= 0x10002000L
// ALPN selection callback
SSL_CTX_set_alpn_select_cb(ctx, alpn_select_proto_cb, nullptr);
#endif // OPENSSL_VERSION_NUMBER >= 0x10002000L
return ec;
}
} // namespace server
} // namespace asio_http2
} // namespace nghttp2