[Pki-users] Custom Profile Input Class

Hello, I'm interested in creating a custom profile input class. More specifically, I'd like to be able to specify the validity period in days in the certificate request. Are there any generic guides for creating custom input classes? I have an idea of what the high level process would be: 1. Create a new profile input class that extends EnrollInput and implements IProfileInput 2. ? Other modifications ? 3. Add custom profile input class to registry.cfg 4. Modify Profile to add the input class to the input class list Any suggestions would be much appreciated. Thanks