/usr/include/asio/ssl/context_base.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.
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// ssl/context_base.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_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/config.hpp"
#include "asio/ssl/detail/openssl_types.hpp"
#include "asio/detail/push_options.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,
/// Generic TLS version 1.1.
tlsv11,
/// TLS version 1.1 client.
tlsv11_client,
/// TLS version 1.1 server.
tlsv11_server,
/// Generic TLS version 1.2.
tlsv12,
/// TLS version 1.2 client.
tlsv12_client,
/// TLS version 1.2 server.
tlsv12_server
};
/// Bitmask type for SSL options.
typedef long options;
#if defined(GENERATING_DOCUMENTATION)
/// Implement various bug workarounds.
static const long default_workarounds = implementation_defined;
/// Always create a new key when using tmp_dh parameters.
static const long single_dh_use = implementation_defined;
/// Disable SSL v2.
static const long no_sslv2 = implementation_defined;
/// Disable SSL v3.
static const long no_sslv3 = implementation_defined;
/// Disable TLS v1.
static const long no_tlsv1 = implementation_defined;
/// Disable TLS v1.1.
static const long no_tlsv1_1 = implementation_defined;
/// Disable TLS v1.2.
static const long no_tlsv1_2 = implementation_defined;
/// Disable compression. Compression is disabled by default.
static const long no_compression = implementation_defined;
#else
ASIO_STATIC_CONSTANT(long, default_workarounds = SSL_OP_ALL);
ASIO_STATIC_CONSTANT(long, single_dh_use = SSL_OP_SINGLE_DH_USE);
ASIO_STATIC_CONSTANT(long, no_sslv2 = SSL_OP_NO_SSLv2);
ASIO_STATIC_CONSTANT(long, no_sslv3 = SSL_OP_NO_SSLv3);
ASIO_STATIC_CONSTANT(long, no_tlsv1 = SSL_OP_NO_TLSv1);
# if defined(SSL_OP_NO_TLSv1_1)
ASIO_STATIC_CONSTANT(long, no_tlsv1_1 = SSL_OP_NO_TLSv1_1);
# else // defined(SSL_OP_NO_TLSv1_1)
ASIO_STATIC_CONSTANT(long, no_tlsv1_1 = 0x10000000L);
# endif // defined(SSL_OP_NO_TLSv1_1)
# if defined(SSL_OP_NO_TLSv1_2)
ASIO_STATIC_CONSTANT(long, no_tlsv1_2 = SSL_OP_NO_TLSv1_2);
# else // defined(SSL_OP_NO_TLSv1_2)
ASIO_STATIC_CONSTANT(long, no_tlsv1_2 = 0x08000000L);
# endif // defined(SSL_OP_NO_TLSv1_2)
# if defined(SSL_OP_NO_COMPRESSION)
ASIO_STATIC_CONSTANT(long, no_compression = SSL_OP_NO_COMPRESSION);
# else // defined(SSL_OP_NO_COMPRESSION)
ASIO_STATIC_CONSTANT(long, no_compression = 0x20000L);
# endif // defined(SSL_OP_NO_COMPRESSION)
#endif
/// File format types.
enum file_format
{
/// ASN.1 file.
asn1,
/// PEM file.
pem
};
#if !defined(GENERATING_DOCUMENTATION)
// The following types and constants are preserved for backward compatibility.
// New programs should use the equivalents of the same names that are defined
// in the asio::ssl namespace.
typedef int verify_mode;
ASIO_STATIC_CONSTANT(int, verify_none = SSL_VERIFY_NONE);
ASIO_STATIC_CONSTANT(int, verify_peer = SSL_VERIFY_PEER);
ASIO_STATIC_CONSTANT(int,
verify_fail_if_no_peer_cert = SSL_VERIFY_FAIL_IF_NO_PEER_CERT);
ASIO_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()
{
}
};
} // namespace ssl
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // ASIO_SSL_CONTEXT_BASE_HPP
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