24 lines
1.4 KiB
Swift
24 lines
1.4 KiB
Swift
import SessionProtocolKit
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import SessionUtilities
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public extension SendingPipeline {
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static func encryptWithSignalProtocol(_ plaintext: Data, for publicKey: String, using transaction: Any) throws -> Data {
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return Data()
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}
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static func encryptWithSharedSenderKeys(_ plaintext: Data, for groupPublicKey: String, using transaction: Any) throws -> Data {
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// 1. ) Encrypt the data with the user's sender key
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guard let userPublicKey = Configuration.shared.storage.getUserPublicKey() else {
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SNLog("Couldn't find user key pair.")
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throw Error.noUserPublicKey
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}
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let (ivAndCiphertext, keyIndex) = try SharedSenderKeys.encrypt(plaintext, for: groupPublicKey, senderPublicKey: userPublicKey, using: transaction)
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let encryptedMessage = ClosedGroupCiphertextMessage(_throws_withIVAndCiphertext: ivAndCiphertext, senderPublicKey: Data(hex: userPublicKey), keyIndex: UInt32(keyIndex))
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// 2. ) Encrypt the result for the group's public key to hide the sender public key and key index
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let intermediate = try AESGCM.encrypt(encryptedMessage.serialized, for: groupPublicKey.removing05PrefixIfNeeded())
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// 3. ) Wrap the result
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return try SNProtoClosedGroupCiphertextMessageWrapper.builder(ciphertext: intermediate.ciphertext, ephemeralPublicKey: intermediate.ephemeralPublicKey).build().serializedData()
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}
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}
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