SNI is not optional when using TLS
If ruby is using openssl with TLS extensions, and we attempt to connect to a server which supports TLS, but not SNI, the connection fails.
uri = URI.parse("https://example.com") # a server that supports TLSv1 but not the TLS extensions http = Net::HTTP.new(uri.host, uri.port) http.use_ssl = true http.ssl_version = :TLSv1 http.verify_mode = OpenSSL::SSL::VERIFY_PEER response = http.get(url)
OpenSSL::SSL::SSLError: SSL_connect returned=1 errno=0 state=SSLv3 read server hello B: parse tlsext
If I patch the
Net::HTTP#connect method to not assign the hostname to the socket (s), we can avoid this error.