func (pka PublicKeyAlgorithm) CanSign() bool {
	switch pka {
	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoDSA:
		return true
	}
	return false
}
func (pka PublicKeyAlgorithm) CanSign() bool {
	switch pka {
	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoDSA:
		return true
	}
	return false
}
func ( pka PublicKeyAlgorithm ) CanSign ( ) bool { switch pka { case PubKeyAlgoRSA , PubKeyAlgoRSASignOnly , PubKeyAlgoDSA : return true } return false }
// CanSign returns true if it's possible for a public key of the given type to
// sign a message.
CanSign returns true if it s possible for a public key of the given type to sign a message .