The names of the encryption service class names should match those of Android and should be renamed to:

AGPassphraseKeyServices -> AGPassphraseEncryptionServices
AGPasswordKeyServices -> AGPasswordEncryptionServices

further the configs:

AGKeyStoreCryptoConfig - AGPasswordProtectedKeychainCryptoConfig
(note KeyChain is used instead of keystore to highlight 'keychain' usage' in iOS)

AGPassphraseCryptoConfig -> AGPassPhraseCryptoConfig (capital P for phrase)