35 lines
1.6 KiB
Swift
35 lines
1.6 KiB
Swift
// Copyright © 2022 Rangeproof Pty Ltd. All rights reserved.
|
|
|
|
import Foundation
|
|
import Curve25519Kit
|
|
import SessionUtilitiesKit
|
|
import Sodium
|
|
|
|
public extension ECKeyPair {
|
|
func convert(to targetPrefix: IdPrefix, with otherKey: String, using sodium: Sodium = Sodium()) throws -> ECKeyPair? {
|
|
guard let publicKeyPrefix: IdPrefix = IdPrefix(with: hexEncodedPublicKey) else { return nil }
|
|
|
|
switch (publicKeyPrefix, targetPrefix) {
|
|
case (.standard, .blinded): // Only support standard -> blinded conversions
|
|
// TODO: Figure out why this is broken...
|
|
// guard let otherPubKeyData: Data = otherKey.data(using: .utf8) else { return nil }
|
|
guard let otherPubKeyData: Data = otherKey.dataFromHex() else { return nil }
|
|
guard let otherPubKeyHashBytes: Bytes = sodium.genericHash.hash(message: [UInt8](otherPubKeyData)) else {
|
|
return nil
|
|
}
|
|
guard let blindedPublicKey: Sodium.SharedSecret = sodium.sharedSecret(otherPubKeyHashBytes, [UInt8](publicKey)) else {
|
|
return nil
|
|
}
|
|
guard let blindedPrivateKey: Sodium.SharedSecret = sodium.sharedSecret(otherPubKeyHashBytes, [UInt8](privateKey)) else {
|
|
return nil
|
|
}
|
|
|
|
return try BlindedECKeyPair(publicKeyData: blindedPublicKey, privateKeyData: blindedPrivateKey)
|
|
|
|
case (.standard, .standard): return self
|
|
case (.blinded, .blinded): return self
|
|
default: return nil
|
|
}
|
|
}
|
|
}
|