requestCertificate
Run synchronous interaction to ask the user to choose a certificate to use with the connection. In general, g_tls_interaction_invoke_request_certificate() should be used instead of this function.
Derived subclasses usually implement a certificate selector, although they may also choose to provide a certificate from elsewhere. Alternatively the user may abort this certificate request, which will usually abort the TLS connection.
If %G_TLS_INTERACTION_HANDLED is returned, then the #GTlsConnection passed to g_tls_interaction_request_certificate() will have had its #GTlsConnection:certificate filled in.
If the interaction is cancelled by the cancellation object, or by the user then %G_TLS_INTERACTION_FAILED will be returned with an error that contains a %G_IO_ERROR_CANCELLED error code. Certain implementations may not support immediate cancellation.
Return
The status of the request certificate interaction.
Since
2.40
Parameters
a #GTlsConnection object
flags providing more information about the request
an optional #GCancellable cancellation object