Re: [Boost.Asio] [SSL] Can I set the host name before performing a handshake?

On Sun, 1 May 2022 at 09:11, B Aleck via Boost-users <
[email protected]> wrote:

> In openssl you call SSL_set_tlsext_host_name to set that
> Can I do that in boost?
>

Yes.

Example from one of my projects:

asio::awaitable< void >
connect(ssl::stream< tcp::socket > &stream, std::string const &host,
std::string const &service)
{
    using asio::use_awaitable;

    co_await connect(stream.next_layer(), host, service);

    // ==================== Set TLS host name here ====================

    if (!SSL_set_tlsext_host_name(stream.native_handle(), host.c_str()))
        throw sys::system_error(ERR_get_error(),
asio::error::get_ssl_category());

    // ================================================================

    co_await stream.async_handshake(ssl::stream_base::client,
use_awaitable);
}




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