Key Update - SL Key

Hi,

I want to activate my customer via web-services (that's key with expiration date)

1. Log with product key
2. generate C2V
3. pass C2V to web service to get activation V2C back
4. use of hasp_update

but when I do a new entitlement (protection key update type ) for change expiration date, I can't find route on web services to get infos.