func (m *openpgpSigningMechanism) importKeysFromBytes(blob []byte) ([]string, error) {
	keyring, err := openpgp.ReadKeyRing(bytes.NewReader(blob))
	if err != nil {
		k, e2 := openpgp.ReadArmoredKeyRing(bytes.NewReader(blob))
		if e2 != nil {
			return nil, err // The original error  -- FIXME: is this better?
		}
		keyring = k
	}

	keyIdentities := []string{}
	for _, entity := range keyring {
		if entity.PrimaryKey == nil {
			// Coverage: This should never happen, openpgp.ReadEntity fails with a
			// openpgp.errors.StructuralError instead of returning an entity with this
			// field set to nil.
			continue
		}
		// Uppercase the fingerprint to be compatible with gpgme
		keyIdentities = append(keyIdentities, strings.ToUpper(fmt.Sprintf("%x", entity.PrimaryKey.Fingerprint)))
		m.keyring = append(m.keyring, entity)
	}
	return keyIdentities, nil
}
func (m *openpgpSigningMechanism) importKeysFromBytes(blob []byte) ([]string, error) {
	keyring, err := openpgp.ReadKeyRing(bytes.NewReader(blob))
	if err != nil {
		k, e2 := openpgp.ReadArmoredKeyRing(bytes.NewReader(blob))
		if e2 != nil {
			return nil, err // The original error  -- FIXME: is this better?
		}
		keyring = k
	}

	keyIdentities := []string{}
	for _, entity := range keyring {
		if entity.PrimaryKey == nil {
			// Coverage: This should never happen, openpgp.ReadEntity fails with a
			// openpgp.errors.StructuralError instead of returning an entity with this
			// field set to nil.
			continue
		}
		// Uppercase the fingerprint to be compatible with gpgme
		keyIdentities = append(keyIdentities, strings.ToUpper(fmt.Sprintf("%x", entity.PrimaryKey.Fingerprint)))
		m.keyring = append(m.keyring, entity)
	}
	return keyIdentities, nil
}
// importKeysFromBytes imports public keys from the supplied blob and returns their identities.
// The blob is assumed to have an appropriate format (the caller is expected to know which one).