keychain-secure-storage

To securely store tokens in the iOS keychain with biometric access, you use a wrapper that provides a SecureStore protocol with configurable KeychainAccessibility. This allows your app to read, write, and delete secrets while enforcing biometric or passcode-based access control.

Yes, you can share keychain secrets across iOS apps and extensions by configuring app groups and keychain sharing. The SecureStore implementation supports optional app group sharing, allowing related targets to securely access the same on-device tokens and secrets.

The best way to migrate sensitive data from UserDefaults to the iOS keychain is to use a centralized KeychainStore wrapper. It provides migration guidance and a unified SecureStore protocol to safely move on-device secrets out of UserDefaults into secure, access-controlled storage.

No, this iOS keychain wrapper does not require any external dependencies. It defines its own SecureStore protocol, KeychainStore implementation, and KeychainAccessibility enum natively, providing a self-contained solution for secure on-device secret management.

To test keychain secure storage logic without touching the real device keychain, you can use the included in-memory store. This test implementation conforms to the SecureStore protocol, allowing you to verify read, write, and delete operations for secrets safely in your testing environment.

Centralizing SecItem calls when managing iOS secure storage prevents apps from scattering keychain code across the codebase. Using a reusable SecureStore wrapper provides robust access control APIs and consistent read, write, and delete operations for all sensitive tokens and secrets.