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[fix] Derive symmetric key correctly #218

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Oct 16, 2023
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[fix] Derive symmetric key correctly #218

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2 changes: 1 addition & 1 deletion OpenHaystack/OpenHaystack/HaystackApp/Model/Accessory.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -214,7 +214,7 @@ class Accessory: ObservableObject, Codable, Identifiable, Equatable, Hashable {
/// Derive FindMyKeys until we have symmetric key from one week before now
while self.lastDerivationTimestamp < Date() - TimeInterval(7 * 24 * 60 * 60) {
self.lastDerivationTimestamp.addTimeInterval(self.updateInterval)
self.oldestRelevantSymmetricKey = Accessory.kdf(inputData: self.symmetricKey, sharedInfo: "update".data(using: .ascii)!, bytesToReturn: 32)
self.oldestRelevantSymmetricKey = Accessory.kdf(inputData: self.oldestRelevantSymmetricKey, sharedInfo: "update".data(using: .ascii)!, bytesToReturn: 32)
}

/// we need to generate Keys from seven days in the past until now and 10 extra keys in case of desynchronization
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