Package =TWiki::Configure::Checkers::Certificate::KeyChecker

This checker validates files that contain private key files such as for the S/MIME signatures and for the Tasks framework.

It must be subclassed for the various certificate types, as the requirements are slightly different.

ObjectMethod check ($valueObject,$password) -> $errorString

• $valueObject - configure value object
• $password - Optional password key name for this file

A lot of checking is done here to prevent mystery errors at runtime.

Returns empty string if OK, error string with any errors