Jürgen Kunz
a6939453f8
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Move the app payload under swift/ while keeping git, package.json, and .smartconfig.json at the repo root. This standardizes the Swift app setup so build, test, run, and watch workflows match the other repos.
20 lines
704 B
Swift
20 lines
704 B
Swift
import CryptoKit
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import Foundation
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enum OneTimePasscodeGenerator {
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static func code(for pairingCode: String, at date: Date) -> String {
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let timeSlot = Int(date.timeIntervalSince1970 / 30)
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let digest = SHA256.hash(data: Data("\(pairingCode)|\(timeSlot)".utf8))
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let value = digest.prefix(4).reduce(UInt32(0)) { partialResult, byte in
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(partialResult << 8) | UInt32(byte)
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}
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return String(format: "%06d", locale: Locale(identifier: "en_US_POSIX"), Int(value % 1_000_000))
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}
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static func renewalCountdown(at date: Date) -> Int {
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let elapsed = Int(date.timeIntervalSince1970) % 30
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return elapsed == 0 ? 30 : 30 - elapsed
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}
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}
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