mirror of https://github.com/oxen-io/session-ios
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
19 lines
1.1 KiB
Swift
19 lines
1.1 KiB
Swift
import SessionUtilitiesKit
|
|
import Sodium
|
|
|
|
extension MessageSender {
|
|
|
|
internal static func encryptWithSessionProtocol(_ plaintext: Data, for recipientHexEncodedX25519PublicKey: String) throws -> Data {
|
|
guard let userED25519KeyPair = SNMessagingKitConfiguration.shared.storage.getUserED25519KeyPair() else { throw Error.noUserED25519KeyPair }
|
|
let recipientX25519PublicKey = Data(hex: recipientHexEncodedX25519PublicKey.removing05PrefixIfNeeded())
|
|
let sodium = Sodium()
|
|
|
|
let verificationData = plaintext + Data(userED25519KeyPair.publicKey) + recipientX25519PublicKey
|
|
guard let signature = sodium.sign.signature(message: Bytes(verificationData), secretKey: userED25519KeyPair.secretKey) else { throw Error.signingFailed }
|
|
let plaintextWithMetadata = plaintext + Data(userED25519KeyPair.publicKey) + Data(signature)
|
|
guard let ciphertext = sodium.box.seal(message: Bytes(plaintextWithMetadata), recipientPublicKey: Bytes(recipientX25519PublicKey)) else { throw Error.encryptionFailed }
|
|
|
|
return Data(ciphertext)
|
|
}
|
|
}
|