NewAuthHandlerFromSigner creates a new AuthHandler from the signer that is passed in.

NewHandlerFromSigner generates a new Handler directly from an existing signer.

NoBundlerMessage is used to alert the user that the server does not have a bundler initialized.

An AuthHandler verifies and signs incoming signature requests.

A Handler accepts requests with a hostname and certficate parameter (which should be PEM-encoded) and returns a new signed certificate.