Cryptotokenkit

If you're building macOS token driver extensions or integrating hardware security tokens with the system keychain, this covers the entire CryptoTokenKit stack. You'll find concrete implementations for TKTokenDriver subclasses, smart card APDU communication, PIN authentication flows, and how to expose token-backed keys as standard keychain items. The architecture split is clear: token extensions run macOS-only to bridge hardware to the system, while client apps on iOS 14+ can query those keychain items. Most useful if you're writing drivers for specific smart cards or USB tokens rather than just consuming existing ones. The session management and certificate authentication patterns are production-ready, not just API surface documentation.

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last updated: Aug 21, 2026

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Install

$ npx -y skills add dpearson2699/swift-ios-skills --skill cryptotokenkit --agent claude-code

Installs into .claude/skills of the current project.

Files

CryptoTokenKit

Use CryptoTokenKit for token driver extensions, smart-card communication, token sessions, token-backed keychain integration, and certificate-based authentication in Swift 6.3 apps.

Platform availability: CryptoTokenKit classes are available across Apple platforms, but capability depends on extension point, entitlement, hardware, and OS version. The smart-card app extension flow for login/keychain unlock is macOS. TKSmartCardSlotManager.default is optional and returns nil unless smart-card access is enabled. iOS/iPadOS 26+ add NFC smart-card slots and registration.