Replace boost by the standalone asio library

1 files changed, 322 insertions, 0 deletions

diff --git a/lib/asio/ssl/detail/impl/engine.ipp b/lib/asio/ssl/detail/impl/engine.ipp
new file mode 100644
index 0000000..e60e8d6
--- /dev/null
+++ b/lib/asio/ssl/detail/impl/engine.ipp
@@ -0,0 +1,322 @@
+//
+// ssl/detail/impl/engine.ipp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// 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_IMPL_ENGINE_IPP
+#define ASIO_SSL_DETAIL_IMPL_ENGINE_IPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+
+#include "asio/detail/throw_error.hpp"
+#include "asio/error.hpp"
+#include "asio/ssl/detail/engine.hpp"
+#include "asio/ssl/error.hpp"
+#include "asio/ssl/verify_context.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace ssl {
+namespace detail {
+
+engine::engine(SSL_CTX* context)
+  : ssl_(::SSL_new(context))
+{
+  if (!ssl_)
+  {
+    asio::error_code ec(
+        static_cast<int>(::ERR_get_error()),
+        asio::error::get_ssl_category());
+    asio::detail::throw_error(ec, "engine");
+  }
+
+#if (OPENSSL_VERSION_NUMBER < 0x10000000L)
+  accept_mutex().init();
+#endif // (OPENSSL_VERSION_NUMBER < 0x10000000L)
+
+  ::SSL_set_mode(ssl_, SSL_MODE_ENABLE_PARTIAL_WRITE);
+  ::SSL_set_mode(ssl_, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
+#if defined(SSL_MODE_RELEASE_BUFFERS)
+  ::SSL_set_mode(ssl_, SSL_MODE_RELEASE_BUFFERS);
+#endif // defined(SSL_MODE_RELEASE_BUFFERS)
+
+  ::BIO* int_bio = 0;
+  ::BIO_new_bio_pair(&int_bio, 0, &ext_bio_, 0);
+  ::SSL_set_bio(ssl_, int_bio, int_bio);
+}
+
+engine::~engine()
+{
+  if (SSL_get_app_data(ssl_))
+  {
+    delete static_cast<verify_callback_base*>(SSL_get_app_data(ssl_));
+    SSL_set_app_data(ssl_, 0);
+  }
+
+  ::BIO_free(ext_bio_);
+  ::SSL_free(ssl_);
+}
+
+SSL* engine::native_handle()
+{
+  return ssl_;
+}
+
+asio::error_code engine::set_verify_mode(
+    verify_mode v, asio::error_code& ec)
+{
+  ::SSL_set_verify(ssl_, v, ::SSL_get_verify_callback(ssl_));
+
+  ec = asio::error_code();
+  return ec;
+}
+
+asio::error_code engine::set_verify_depth(
+    int depth, asio::error_code& ec)
+{
+  ::SSL_set_verify_depth(ssl_, depth);
+
+  ec = asio::error_code();
+  return ec;
+}
+
+asio::error_code engine::set_verify_callback(
+    verify_callback_base* callback, asio::error_code& ec)
+{
+  if (SSL_get_app_data(ssl_))
+    delete static_cast<verify_callback_base*>(SSL_get_app_data(ssl_));
+
+  SSL_set_app_data(ssl_, callback);
+
+  ::SSL_set_verify(ssl_, ::SSL_get_verify_mode(ssl_),
+      &engine::verify_callback_function);
+
+  ec = asio::error_code();
+  return ec;
+}
+
+int engine::verify_callback_function(int preverified, X509_STORE_CTX* ctx)
+{
+  if (ctx)
+  {
+    if (SSL* ssl = static_cast<SSL*>(
+          ::X509_STORE_CTX_get_ex_data(
+            ctx, ::SSL_get_ex_data_X509_STORE_CTX_idx())))
+    {
+      if (SSL_get_app_data(ssl))
+      {
+        verify_callback_base* callback =
+          static_cast<verify_callback_base*>(
+              SSL_get_app_data(ssl));
+
+        verify_context verify_ctx(ctx);
+        return callback->call(preverified != 0, verify_ctx) ? 1 : 0;
+      }
+    }
+  }
+
+  return 0;
+}
+
+engine::want engine::handshake(
+    stream_base::handshake_type type, asio::error_code& ec)
+{
+  return perform((type == asio::ssl::stream_base::client)
+      ? &engine::do_connect : &engine::do_accept, 0, 0, ec, 0);
+}
+
+engine::want engine::shutdown(asio::error_code& ec)
+{
+  return perform(&engine::do_shutdown, 0, 0, ec, 0);
+}
+
+engine::want engine::write(const asio::const_buffer& data,
+    asio::error_code& ec, std::size_t& bytes_transferred)
+{
+  if (data.size() == 0)
+  {
+    ec = asio::error_code();
+    return engine::want_nothing;
+  }
+
+  return perform(&engine::do_write,
+      const_cast<void*>(data.data()),
+      data.size(), ec, &bytes_transferred);
+}
+
+engine::want engine::read(const asio::mutable_buffer& data,
+    asio::error_code& ec, std::size_t& bytes_transferred)
+{
+  if (data.size() == 0)
+  {
+    ec = asio::error_code();
+    return engine::want_nothing;
+  }
+
+  return perform(&engine::do_read, data.data(),
+      data.size(), ec, &bytes_transferred);
+}
+
+asio::mutable_buffer engine::get_output(
+    const asio::mutable_buffer& data)
+{
+  int length = ::BIO_read(ext_bio_,
+      data.data(), static_cast<int>(data.size()));
+
+  return asio::buffer(data,
+      length > 0 ? static_cast<std::size_t>(length) : 0);
+}
+
+asio::const_buffer engine::put_input(
+    const asio::const_buffer& data)
+{
+  int length = ::BIO_write(ext_bio_,
+      data.data(), static_cast<int>(data.size()));
+
+  return asio::buffer(data +
+      (length > 0 ? static_cast<std::size_t>(length) : 0));
+}
+
+const asio::error_code& engine::map_error_code(
+    asio::error_code& ec) const
+{
+  // We only want to map the error::eof code.
+  if (ec != asio::error::eof)
+    return ec;
+
+  // If there's data yet to be read, it's an error.
+  if (BIO_wpending(ext_bio_))
+  {
+    ec = asio::ssl::error::stream_truncated;
+    return ec;
+  }
+
+  // SSL v2 doesn't provide a protocol-level shutdown, so an eof on the
+  // underlying transport is passed through.
+#if (OPENSSL_VERSION_NUMBER < 0x10100000L)
+  if (SSL_version(ssl_) == SSL2_VERSION)
+    return ec;
+#endif // (OPENSSL_VERSION_NUMBER < 0x10100000L)
+
+  // Otherwise, the peer should have negotiated a proper shutdown.
+  if ((::SSL_get_shutdown(ssl_) & SSL_RECEIVED_SHUTDOWN) == 0)
+  {
+    ec = asio::ssl::error::stream_truncated;
+  }
+
+  return ec;
+}
+
+#if (OPENSSL_VERSION_NUMBER < 0x10000000L)
+asio::detail::static_mutex& engine::accept_mutex()
+{
+  static asio::detail::static_mutex mutex = ASIO_STATIC_MUTEX_INIT;
+  return mutex;
+}
+#endif // (OPENSSL_VERSION_NUMBER < 0x10000000L)
+
+engine::want engine::perform(int (engine::* op)(void*, std::size_t),
+    void* data, std::size_t length, asio::error_code& ec,
+    std::size_t* bytes_transferred)
+{
+  std::size_t pending_output_before = ::BIO_ctrl_pending(ext_bio_);
+  ::ERR_clear_error();
+  int result = (this->*op)(data, length);
+  int ssl_error = ::SSL_get_error(ssl_, result);
+  int sys_error = static_cast<int>(::ERR_get_error());
+  std::size_t pending_output_after = ::BIO_ctrl_pending(ext_bio_);
+
+  if (ssl_error == SSL_ERROR_SSL)
+  {
+    ec = asio::error_code(sys_error,
+        asio::error::get_ssl_category());
+    return want_nothing;
+  }
+
+  if (ssl_error == SSL_ERROR_SYSCALL)
+  {
+    ec = asio::error_code(sys_error,
+        asio::error::get_system_category());
+    return want_nothing;
+  }
+
+  if (result > 0 && bytes_transferred)
+    *bytes_transferred = static_cast<std::size_t>(result);
+
+  if (ssl_error == SSL_ERROR_WANT_WRITE)
+  {
+    ec = asio::error_code();
+    return want_output_and_retry;
+  }
+  else if (pending_output_after > pending_output_before)
+  {
+    ec = asio::error_code();
+    return result > 0 ? want_output : want_output_and_retry;
+  }
+  else if (ssl_error == SSL_ERROR_WANT_READ)
+  {
+    ec = asio::error_code();
+    return want_input_and_retry;
+  }
+  else if (::SSL_get_shutdown(ssl_) & SSL_RECEIVED_SHUTDOWN)
+  {
+    ec = asio::error::eof;
+    return want_nothing;
+  }
+  else
+  {
+    ec = asio::error_code();
+    return want_nothing;
+  }
+}
+
+int engine::do_accept(void*, std::size_t)
+{
+#if (OPENSSL_VERSION_NUMBER < 0x10000000L)
+  asio::detail::static_mutex::scoped_lock lock(accept_mutex());
+#endif // (OPENSSL_VERSION_NUMBER < 0x10000000L)
+  return ::SSL_accept(ssl_);
+}
+
+int engine::do_connect(void*, std::size_t)
+{
+  return ::SSL_connect(ssl_);
+}
+
+int engine::do_shutdown(void*, std::size_t)
+{
+  int result = ::SSL_shutdown(ssl_);
+  if (result == 0)
+    result = ::SSL_shutdown(ssl_);
+  return result;
+}
+
+int engine::do_read(void* data, std::size_t length)
+{
+  return ::SSL_read(ssl_, data,
+      length < INT_MAX ? static_cast<int>(length) : INT_MAX);
+}
+
+int engine::do_write(void* data, std::size_t length)
+{
+  return ::SSL_write(ssl_, data,
+      length < INT_MAX ? static_cast<int>(length) : INT_MAX);
+}
+
+} // namespace detail
+} // namespace ssl
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // ASIO_SSL_DETAIL_IMPL_ENGINE_IPP