Keychain Services is a programming interface that enables you to find, add, modify, and delete keychain items.
- iOS 2.0+
- macOS 10.0+
- tvOS 9.0+
- watchOS 2.0+
If you want to look at some code that uses this API, you can find the source code for the security command-line tool in the
Security project on http://opensource.apple.com/.