From e95946831f8ef53d29590735a2df661385edb008 Mon Sep 17 00:00:00 2001 From: "Matthias P. Braendli" Date: Mon, 6 Aug 2018 10:35:22 +0200 Subject: Replace boost by the standalone asio library --- lib/asio/ssl/detail/engine.hpp | 160 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 160 insertions(+) create mode 100644 lib/asio/ssl/detail/engine.hpp (limited to 'lib/asio/ssl/detail/engine.hpp') diff --git a/lib/asio/ssl/detail/engine.hpp b/lib/asio/ssl/detail/engine.hpp new file mode 100644 index 0000000..2f033d6 --- /dev/null +++ b/lib/asio/ssl/detail/engine.hpp @@ -0,0 +1,160 @@ +// +// ssl/detail/engine.hpp +// ~~~~~~~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com) +// +// Distributed under the Boost Software License, Version 1.0. (See accompanying +// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) +// + +#ifndef ASIO_SSL_DETAIL_ENGINE_HPP +#define ASIO_SSL_DETAIL_ENGINE_HPP + +#if defined(_MSC_VER) && (_MSC_VER >= 1200) +# pragma once +#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) + +#include "asio/detail/config.hpp" + +#include "asio/buffer.hpp" +#include "asio/detail/static_mutex.hpp" +#include "asio/ssl/detail/openssl_types.hpp" +#include "asio/ssl/detail/verify_callback.hpp" +#include "asio/ssl/stream_base.hpp" +#include "asio/ssl/verify_mode.hpp" + +#include "asio/detail/push_options.hpp" + +namespace asio { +namespace ssl { +namespace detail { + +class engine +{ +public: + enum want + { + // Returned by functions to indicate that the engine wants input. The input + // buffer should be updated to point to the data. The engine then needs to + // be called again to retry the operation. + want_input_and_retry = -2, + + // Returned by functions to indicate that the engine wants to write output. + // The output buffer points to the data to be written. The engine then + // needs to be called again to retry the operation. + want_output_and_retry = -1, + + // Returned by functions to indicate that the engine doesn't need input or + // output. + want_nothing = 0, + + // Returned by functions to indicate that the engine wants to write output. + // The output buffer points to the data to be written. After that the + // operation is complete, and the engine does not need to be called again. + want_output = 1 + }; + + // Construct a new engine for the specified context. + ASIO_DECL explicit engine(SSL_CTX* context); + + // Destructor. + ASIO_DECL ~engine(); + + // Get the underlying implementation in the native type. + ASIO_DECL SSL* native_handle(); + + // Set the peer verification mode. + ASIO_DECL asio::error_code set_verify_mode( + verify_mode v, asio::error_code& ec); + + // Set the peer verification depth. + ASIO_DECL asio::error_code set_verify_depth( + int depth, asio::error_code& ec); + + // Set a peer certificate verification callback. + ASIO_DECL asio::error_code set_verify_callback( + verify_callback_base* callback, asio::error_code& ec); + + // Perform an SSL handshake using either SSL_connect (client-side) or + // SSL_accept (server-side). + ASIO_DECL want handshake( + stream_base::handshake_type type, asio::error_code& ec); + + // Perform a graceful shutdown of the SSL session. + ASIO_DECL want shutdown(asio::error_code& ec); + + // Write bytes to the SSL session. + ASIO_DECL want write(const asio::const_buffer& data, + asio::error_code& ec, std::size_t& bytes_transferred); + + // Read bytes from the SSL session. + ASIO_DECL want read(const asio::mutable_buffer& data, + asio::error_code& ec, std::size_t& bytes_transferred); + + // Get output data to be written to the transport. + ASIO_DECL asio::mutable_buffer get_output( + const asio::mutable_buffer& data); + + // Put input data that was read from the transport. + ASIO_DECL asio::const_buffer put_input( + const asio::const_buffer& data); + + // Map an error::eof code returned by the underlying transport according to + // the type and state of the SSL session. Returns a const reference to the + // error code object, suitable for passing to a completion handler. + ASIO_DECL const asio::error_code& map_error_code( + asio::error_code& ec) const; + +private: + // Disallow copying and assignment. + engine(const engine&); + engine& operator=(const engine&); + + // Callback used when the SSL implementation wants to verify a certificate. + ASIO_DECL static int verify_callback_function( + int preverified, X509_STORE_CTX* ctx); + +#if (OPENSSL_VERSION_NUMBER < 0x10000000L) + // The SSL_accept function may not be thread safe. This mutex is used to + // protect all calls to the SSL_accept function. + ASIO_DECL static asio::detail::static_mutex& accept_mutex(); +#endif // (OPENSSL_VERSION_NUMBER < 0x10000000L) + + // Perform one operation. Returns >= 0 on success or error, want_read if the + // operation needs more input, or want_write if it needs to write some output + // before the operation can complete. + ASIO_DECL want perform(int (engine::* op)(void*, std::size_t), + void* data, std::size_t length, asio::error_code& ec, + std::size_t* bytes_transferred); + + // Adapt the SSL_accept function to the signature needed for perform(). + ASIO_DECL int do_accept(void*, std::size_t); + + // Adapt the SSL_connect function to the signature needed for perform(). + ASIO_DECL int do_connect(void*, std::size_t); + + // Adapt the SSL_shutdown function to the signature needed for perform(). + ASIO_DECL int do_shutdown(void*, std::size_t); + + // Adapt the SSL_read function to the signature needed for perform(). + ASIO_DECL int do_read(void* data, std::size_t length); + + // Adapt the SSL_write function to the signature needed for perform(). + ASIO_DECL int do_write(void* data, std::size_t length); + + SSL* ssl_; + BIO* ext_bio_; +}; + +} // namespace detail +} // namespace ssl +} // namespace asio + +#include "asio/detail/pop_options.hpp" + +#if defined(ASIO_HEADER_ONLY) +# include "asio/ssl/detail/impl/engine.ipp" +#endif // defined(ASIO_HEADER_ONLY) + +#endif // ASIO_SSL_DETAIL_ENGINE_HPP -- cgit v1.2.3