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### ssl::rfc2818_verification

Verifies a certificate against a hostname according to the rules described in RFC 2818.

    class rfc2818_verification

##### Types

Name | Description
--- | ---
result_type | The type of the function object's result.

##### Member Functions

Name | Description
--- | ---
operator() | Perform certificate verification.
rfc2818_verification | Constructor.

##### Example

The following example shows how to synchronously open a secure connection to a given host name:

    using boost::asio::ip::tcp;
    namespace ssl = boost::asio::ssl;
    typedef ssl::stream<tcp::socket> ssl_socket;

    // Create a context that uses the default paths for finding CA certificates.
    ssl::context ctx(ssl::context::sslv23);
    ctx.set_default_verify_paths();

    // Open a socket and connect it to the remote host.
    boost::asio::io_context io_context;
    ssl_socket sock(io_context, ctx);
    tcp::resolver resolver(io_context);
    tcp::resolver::query query("host.name", "https");
    boost::asio::connect(sock.lowest_layer(), resolver.resolve(query));
    sock.lowest_layer().set_option(tcp::no_delay(true));

    // Perform SSL handshake and verify the remote host's certificate.
    sock.set_verify_mode(ssl::verify_peer);
    sock.set_verify_callback(ssl::rfc2818_verification("host.name"));
    sock.handshake(ssl_socket::client);

    // ... read and write as normal ...

##### Requirements

Header: `boost/asio/ssl/rfc2818_verification.hpp`

Convenience header: `boost/asio/ssl.hpp`