This file is indexed.

/usr/include/asio/ssl/detail/engine.hpp is in libasio-dev 1:1.10.8-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
//
// ssl/detail/engine.hpp
// ~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2016 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"

#if !defined(ASIO_ENABLE_OLD_SSL)
# 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"
#endif // !defined(ASIO_ENABLE_OLD_SSL)

#include "asio/detail/push_options.hpp"

namespace asio {
namespace ssl {
namespace detail {

#if !defined(ASIO_ENABLE_OLD_SSL)

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_buffers_1 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);

  // 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();

  // 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_;
};

#endif // !defined(ASIO_ENABLE_OLD_SSL)

} // 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