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Merge pull request #334 from tangem/IOS-4876_refactor_backup_flow
IOS-4876 Split certificate loading
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TangemSdk/TangemSdk/Operations/Backup/BackupCertificateProvider.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| // | ||
| // BackupCertificateProvider.swift | ||
| // TangemSdk | ||
| // | ||
| // Created by Alexander Osokin on 27.12.2023. | ||
| // Copyright © 2023 Tangem AG. All rights reserved. | ||
| // | ||
|
|
||
| import Foundation | ||
| import Combine | ||
|
|
||
| @available(iOS 13.0, *) | ||
| class BackupCertificateProvider { | ||
| private let onlineCardVerifier = OnlineCardVerifier() | ||
| private var cancellable: AnyCancellable? = nil | ||
| private let developmentMode: Bool | ||
|
|
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| private let sdkIssuerPrivateKey = Data(hexString: "11121314151617184771ED81F2BACF57479E4735EB1405083927372D40DA9E92") | ||
|
|
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| init(developmentMode: Bool) { | ||
| self.developmentMode = developmentMode | ||
| } | ||
|
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| func getCertificate(for cardId: String, cardPublicKey: Data, _ completion: @escaping CompletionResult<Data>) { | ||
| loadSignature(for: cardId, cardPublicKey: cardPublicKey) { loadCompletion in | ||
| switch loadCompletion { | ||
| case .success(let signature): | ||
| do { | ||
| let certificate = try BackupCertificateProvider.generateCertificate(cardPublicKey: cardPublicKey, issuerSignature: signature) | ||
| completion(.success(certificate)) | ||
| } catch { | ||
| completion(.failure(error.toTangemSdkError())) | ||
| } | ||
| case .failure(let error): | ||
| completion(.failure(error)) | ||
| } | ||
| } | ||
| } | ||
|
|
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| private func loadSignature(for cardId: String, cardPublicKey: Data, _ completion: @escaping CompletionResult<Data>) { | ||
| if developmentMode { | ||
| do { | ||
| let sdkIssuerSignature = try cardPublicKey.sign(privateKey: sdkIssuerPrivateKey) | ||
| completion(.success(sdkIssuerSignature)) | ||
| } catch { | ||
| completion(.failure(error.toTangemSdkError())) | ||
| } | ||
| return | ||
| } | ||
|
|
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| cancellable = onlineCardVerifier | ||
| .getCardData(cardId: cardId, cardPublicKey: cardPublicKey) | ||
| .sink(receiveCompletion: { receivedCompletion in | ||
| if case .failure = receivedCompletion { | ||
| completion(.failure(.issuerSignatureLoadingFailed)) | ||
| } | ||
| }, receiveValue: { response in | ||
| guard let signature = response.issuerSignature else { | ||
| completion(.failure(.issuerSignatureLoadingFailed)) | ||
| return | ||
| } | ||
|
|
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| completion(.success(signature)) | ||
| }) | ||
| } | ||
|
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| private static func generateCertificate(cardPublicKey: Data, issuerSignature: Data) throws -> Data { | ||
| return try TlvBuilder() | ||
| .append(.cardPublicKey, value: cardPublicKey) | ||
| .append(.issuerDataSignature, value: issuerSignature) | ||
| .serialize() | ||
| } | ||
| } |
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