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Keep around skipped message keys until they're used

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nielsandriesse 2020-10-03 12:14:24 +10:00
parent 1a264595c8
commit 2b3e71cde6
1 changed files with 6 additions and 3 deletions
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9
SignalServiceKit/src/Loki/Protocol/Closed Groups/SharedSenderKeysImplementation.swift
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@ -109,16 +109,19 @@ public final class SharedSenderKeysImplementation : NSObject {
return ratchet
} else {
var currentKeyIndex = ratchet.keyIndex
var result = ratchet
var current = ratchet
var messageKeys: [String] = []
while currentKeyIndex < targetKeyIndex {
do {
result = try step(result)
currentKeyIndex = result.keyIndex
current = try step(current)
messageKeys += current.messageKeys
currentKeyIndex = current.keyIndex
} catch {
print("[Loki] Couldn't step ratchet due to error: \(error).")
throw error
}
}
let result = ClosedGroupRatchet(chainKey: current.chainKey, keyIndex: current.keyIndex, messageKeys: messageKeys) // Includes any skipped message keys
Storage.setClosedGroupRatchet(for: groupPublicKey, senderPublicKey: senderPublicKey, ratchet: result, using: transaction)
return result
}