76 lines
2.2 KiB
Swift
76 lines
2.2 KiB
Swift
//
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// Copyright 2023 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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import Foundation
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import LibSignalClient
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import SignalCoreKit
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/// Represents an envelope that's already been decrypted.
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///
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/// This might be a message from one of our linked devices, or it might be a
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/// message from another user.
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///
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/// Identified and unidentified envelopes take different paths to produce
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/// this object, but they both produce this type so that most downstream
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/// logic doesn't need to care about the source of a message.
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///
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/// For identified envelopes, `sourceAci` is taken directly from the
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/// `ValidatedIncomingEnvelope`, and then we decrypt the envelope payload to
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/// populate `plaintextData`.
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///
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/// For unidentified envelopes, we first decrypt the envelope payload which
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/// gives us the `sourceAci` and a nested payload. We then decrypt that
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/// nested payload to populate `plaintextData`.
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@objc
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class DecryptedIncomingEnvelope: NSObject {
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@objc
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let envelope: SSKProtoEnvelope
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@objc
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let timestamp: UInt64
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@objc
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let serverTimestamp: UInt64
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let sourceAci: Aci
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@objc
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let sourceDeviceId: UInt32
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let localIdentity: OWSIdentity
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let wasReceivedByUD: Bool
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let plaintextData: Data
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let content: SSKProtoContent?
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@objc
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var sourceAciObjC: AciObjC { AciObjC(sourceAci) }
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init(
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validatedEnvelope: ValidatedIncomingEnvelope,
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updatedEnvelope: SSKProtoEnvelope,
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sourceAci: Aci,
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sourceDeviceId: UInt32,
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wasReceivedByUD: Bool,
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plaintextData: Data
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) {
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self.envelope = updatedEnvelope
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self.timestamp = validatedEnvelope.timestamp
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self.serverTimestamp = validatedEnvelope.serverTimestamp
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self.sourceAci = sourceAci
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self.sourceDeviceId = sourceDeviceId
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self.localIdentity = validatedEnvelope.localIdentity
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self.wasReceivedByUD = wasReceivedByUD
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self.plaintextData = plaintextData
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self.content = {
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do {
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return try SSKProtoContent(serializedData: plaintextData)
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} catch {
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owsFailDebug("Failed to deserialize content proto: \(error)")
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return nil
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}
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}()
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}
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}
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