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diff --git a/ext/asio/ssl/context_base.hpp b/ext/asio/ssl/context_base.hpp
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+//
+// context_base.hpp
+// ~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2005-2010 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_CONTEXT_BASE_HPP
+#define ASIO_SSL_CONTEXT_BASE_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/push_options.hpp"
+
+#include "asio/detail/push_options.hpp"
+#include <boost/config.hpp>
+#include <boost/detail/workaround.hpp>
+#include "asio/detail/pop_options.hpp"
+
+#include "asio/ssl/detail/openssl_types.hpp"
+
+namespace asio {
+namespace ssl {
+
+/// The context_base class is used as a base for the basic_context class
+/// template so that we have a common place to define various enums.
+class context_base
+{
+public:
+  /// Different methods supported by a context.
+  enum method
+  {
+    /// Generic SSL version 2.
+    sslv2,
+
+    /// SSL version 2 client.
+    sslv2_client,
+
+    /// SSL version 2 server.
+    sslv2_server,
+
+    /// Generic SSL version 3.
+    sslv3,
+
+    /// SSL version 3 client.
+    sslv3_client,
+
+    /// SSL version 3 server.
+    sslv3_server,
+
+    /// Generic TLS version 1.
+    tlsv1,
+
+    /// TLS version 1 client.
+    tlsv1_client,
+
+    /// TLS version 1 server.
+    tlsv1_server,
+
+    /// Generic SSL/TLS.
+    sslv23,
+
+    /// SSL/TLS client.
+    sslv23_client,
+
+    /// SSL/TLS server.
+    sslv23_server
+  };
+
+  /// Bitmask type for SSL options.
+  typedef int options;
+
+#if defined(GENERATING_DOCUMENTATION)
+  /// Implement various bug workarounds.
+  static const int default_workarounds = implementation_defined;
+
+  /// Always create a new key when using tmp_dh parameters.
+  static const int single_dh_use = implementation_defined;
+
+  /// Disable SSL v2.
+  static const int no_sslv2 = implementation_defined;
+
+  /// Disable SSL v3.
+  static const int no_sslv3 = implementation_defined;
+
+  /// Disable TLS v1.
+  static const int no_tlsv1 = implementation_defined;
+#else
+  BOOST_STATIC_CONSTANT(int, default_workarounds = SSL_OP_ALL);
+  BOOST_STATIC_CONSTANT(int, single_dh_use = SSL_OP_SINGLE_DH_USE);
+  BOOST_STATIC_CONSTANT(int, no_sslv2 = SSL_OP_NO_SSLv2);
+  BOOST_STATIC_CONSTANT(int, no_sslv3 = SSL_OP_NO_SSLv3);
+  BOOST_STATIC_CONSTANT(int, no_tlsv1 = SSL_OP_NO_TLSv1);
+#endif
+
+  /// File format types.
+  enum file_format
+  {
+    /// ASN.1 file.
+    asn1,
+
+    /// PEM file.
+    pem
+  };
+
+  /// Bitmask type for peer verification.
+  typedef int verify_mode;
+
+#if defined(GENERATING_DOCUMENTATION)
+  /// No verification.
+  static const int verify_none = implementation_defined;
+
+  /// Verify the peer.
+  static const int verify_peer = implementation_defined;
+
+  /// Fail verification if the peer has no certificate. Ignored unless
+  /// verify_peer is set.
+  static const int verify_fail_if_no_peer_cert = implementation_defined;
+
+  /// Do not request client certificate on renegotiation. Ignored unless
+  /// verify_peer is set.
+  static const int verify_client_once = implementation_defined;
+#else
+  BOOST_STATIC_CONSTANT(int, verify_none = SSL_VERIFY_NONE);
+  BOOST_STATIC_CONSTANT(int, verify_peer = SSL_VERIFY_PEER);
+  BOOST_STATIC_CONSTANT(int,
+      verify_fail_if_no_peer_cert = SSL_VERIFY_FAIL_IF_NO_PEER_CERT);
+  BOOST_STATIC_CONSTANT(int, verify_client_once = SSL_VERIFY_CLIENT_ONCE);
+#endif
+
+  /// Purpose of PEM password.
+  enum password_purpose
+  {
+    /// The password is needed for reading/decryption.
+    for_reading,
+
+    /// The password is needed for writing/encryption.
+    for_writing
+  };
+
+protected:
+  /// Protected destructor to prevent deletion through this type.
+  ~context_base()
+  {
+  }
+
+#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
+private:
+  // Workaround to enable the empty base optimisation with Borland C++.
+  char dummy_;
+#endif
+};
+
+} // namespace ssl
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // ASIO_SSL_CONTEXT_BASE_HPP