PgpSignature
The creation time of this signature.
The hash algorithm associated with this signature.
Return true if the signature has either hashed or unhashed subpackets.
The key algorithm associated with this signature.
The ID of the key that created the signature.
The OpenPGP version number for this signature.
Return true if the passed in signature type represents a certification, false if the signature type is not.
Return the digest prefix of the signature.
Return true if this signature represents a certification.
Verify the signature as certifying the passed in public key as associated
with the passed in user attributes.
Verify the signature as certifying the passed in public key as associated
with the passed in ID.
Verify a certification for the passed in key against the passed in master key.
Verify a key certification, such as revocation, for the passed in key.