swift
10 lines · 1 tab
Kai Nakamura
Apr 2026
1 tab
final class PinnedSessionDelegate: NSObject, URLSessionDelegate {
func urlSession(_ session: URLSession, didReceive challenge: URLAuthenticationChallenge, completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
guard let serverTrust = challenge.protectionSpace.serverTrust else {
completionHandler(.cancelAuthenticationChallenge, nil)
return
}
completionHandler(.useCredential, URLCredential(trust: serverTrust))
}
}
1 file · swift
Explain with highlit
Certificate pinning is useful in high-risk mobile scenarios, but it has real operational cost. I use it selectively, plan backup pins, and make sure the team can rotate infrastructure without bricking clients. Security controls that ignore operational reality eventually get ripped out.
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