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+//
+// ssl/context_base.hpp
+// ~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2024 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,
+
+ /// Generic TLS version 1.3.
+ tlsv13,
+
+ /// TLS version 1.3 client.
+ tlsv13_client,
+
+ /// TLS version 1.3 server.
+ tlsv13_server,
+
+ /// Generic TLS.
+ tls,
+
+ /// TLS client.
+ tls_client,
+
+ /// TLS server.
+ tls_server
+ };
+
+ /// Bitmask type for SSL options.
+ typedef uint64_t options;
+
+#if defined(GENERATING_DOCUMENTATION)
+ /// Implement various bug workarounds.
+ static const uint64_t default_workarounds = implementation_defined;
+
+ /// Always create a new key when using tmp_dh parameters.
+ static const uint64_t single_dh_use = implementation_defined;
+
+ /// Disable SSL v2.
+ static const uint64_t no_sslv2 = implementation_defined;
+
+ /// Disable SSL v3.
+ static const uint64_t no_sslv3 = implementation_defined;
+
+ /// Disable TLS v1.
+ static const uint64_t no_tlsv1 = implementation_defined;
+
+ /// Disable TLS v1.1.
+ static const uint64_t no_tlsv1_1 = implementation_defined;
+
+ /// Disable TLS v1.2.
+ static const uint64_t no_tlsv1_2 = implementation_defined;
+
+ /// Disable TLS v1.3.
+ static const uint64_t no_tlsv1_3 = implementation_defined;
+
+ /// Disable compression. Compression is disabled by default.
+ static const uint64_t no_compression = implementation_defined;
+#else
+ ASIO_STATIC_CONSTANT(uint64_t, default_workarounds = SSL_OP_ALL);
+ ASIO_STATIC_CONSTANT(uint64_t, single_dh_use = SSL_OP_SINGLE_DH_USE);
+ ASIO_STATIC_CONSTANT(uint64_t, no_sslv2 = SSL_OP_NO_SSLv2);
+ ASIO_STATIC_CONSTANT(uint64_t, no_sslv3 = SSL_OP_NO_SSLv3);
+ ASIO_STATIC_CONSTANT(uint64_t, no_tlsv1 = SSL_OP_NO_TLSv1);
+# if defined(SSL_OP_NO_TLSv1_1)
+ ASIO_STATIC_CONSTANT(uint64_t, no_tlsv1_1 = SSL_OP_NO_TLSv1_1);
+# else // defined(SSL_OP_NO_TLSv1_1)
+ ASIO_STATIC_CONSTANT(uint64_t, no_tlsv1_1 = 0x10000000L);
+# endif // defined(SSL_OP_NO_TLSv1_1)
+# if defined(SSL_OP_NO_TLSv1_2)
+ ASIO_STATIC_CONSTANT(uint64_t, no_tlsv1_2 = SSL_OP_NO_TLSv1_2);
+# else // defined(SSL_OP_NO_TLSv1_2)
+ ASIO_STATIC_CONSTANT(uint64_t, no_tlsv1_2 = 0x08000000L);
+# endif // defined(SSL_OP_NO_TLSv1_2)
+# if defined(SSL_OP_NO_TLSv1_3)
+ ASIO_STATIC_CONSTANT(uint64_t, no_tlsv1_3 = SSL_OP_NO_TLSv1_3);
+# else // defined(SSL_OP_NO_TLSv1_3)
+ ASIO_STATIC_CONSTANT(uint64_t, no_tlsv1_3 = 0x20000000L);
+# endif // defined(SSL_OP_NO_TLSv1_3)
+# if defined(SSL_OP_NO_COMPRESSION)
+ ASIO_STATIC_CONSTANT(uint64_t, no_compression = SSL_OP_NO_COMPRESSION);
+# else // defined(SSL_OP_NO_COMPRESSION)
+ ASIO_STATIC_CONSTANT(uint64_t, 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