Function silc_client_add_private_message_key_ske
SYNOPSIS
int silc_client_add_private_message_key_ske(SilcClient client,
SilcClientConnection conn,
SilcClientEntry client_entry,
char *cipher,
SilcSKEKeyMaterial *key);
DESCRIPTION
Same as silc_client_add_private_message_key but takes the key material
from the SKE key material structure. This structure is received if
the application uses the silc_client_send_key_agreement to negotiate
the key material. The `cipher' SHOULD be provided as it is negotiated
also in the SKE protocol.