Apple’s CommonCrypto library provides core symmetric encryption and other common functions, but uses a low level API that is difficult to use. CryptoLab includes a thin Swift language wrapper around CommonCrypto, then adds some convenience methods for ease of use.

Apple’s SecKey API provides high level encryption and other common functions with a mid level CoreFoundation based API. CryptoLab provides a Swift API for both CoreFoundation and higher level access of common encryption functions such as asymmetric encryption and signing. See the unit tests for examples.

CommonCrypto includes functions to support key generation from passwords. CryptoLab includes sample utilities and a macOS application to illustrate password based encryption and message authentication.