AddKeyToKeyRingFromReader imports the PGP keys stored in a Reader into the passed KeyRing.

NewKeyRing creates a new keyring from the passed EntityList.

Verify verifies a signed message's signature, and returns the message that was signed as well as an error if applicable.

KeyRing wraps an OpenPGP EntityList (which implements openpgp.KeyRing), adding support for determining which key is associated with which check.