If this callback is null, the builtin software RSA key-gen will be used. This is for behavioural compatibility whilst the code gets rewired, but one day it would be nice to assume there are no such things as "builtin software" implementations.
See Implementation
If this callback is null, the builtin software RSA key-gen will be used. This is for behavioural compatibility whilst the code gets rewired, but one day it would be nice to assume there are no such things as "builtin software" implementations.