39 lines
2.0 KiB
Swift
39 lines
2.0 KiB
Swift
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public struct OpenGroupMessageV2 {
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public let serverID: Int64?
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public let sender: String?
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public let sentTimestamp: UInt64
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/// The serialized protobuf in base64 encoding.
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public let base64EncodedData: String
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/// When sending a message, the sender signs the serialized protobuf with their private key so that
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/// a receiving user can verify that the message wasn't tampered with.
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public let base64EncodedSignature: String?
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public func sign() -> OpenGroupMessageV2? {
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let userKeyPair = SNMessagingKitConfiguration.shared.storage.getUserKeyPair()!
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let data = Data(base64Encoded: base64EncodedData)!
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guard let signature = try? Ed25519.sign(data, with: userKeyPair) else {
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SNLog("Failed to sign open group message.")
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return nil
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}
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return OpenGroupMessageV2(serverID: serverID, sender: sender, sentTimestamp: sentTimestamp,
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base64EncodedData: base64EncodedData, base64EncodedSignature: signature.base64EncodedString())
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}
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public func toJSON() -> JSON? {
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var result: JSON = [ "data" : base64EncodedData, "timestamp" : sentTimestamp ]
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if let serverID = serverID { result["server_id"] = serverID }
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if let sender = sender { result["public_key"] = sender }
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if let base64EncodedSignature = base64EncodedSignature { result["signature"] = base64EncodedSignature }
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return result
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}
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public static func fromJSON(_ json: JSON) -> OpenGroupMessageV2? {
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guard let base64EncodedData = json["data"] as? String, let sentTimestamp = json["timestamp"] as? UInt64 else { return nil }
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let serverID = json["server_id"] as? Int64
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let sender = json["public_key"] as? String
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let base64EncodedSignature = json["signature"] as? String
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return OpenGroupMessageV2(serverID: serverID, sender: sender, sentTimestamp: sentTimestamp, base64EncodedData: base64EncodedData, base64EncodedSignature: base64EncodedSignature)
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}
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}
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