czarny
335 lines
10 KiB
Swift
335 lines
10 KiB
Swift
//
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// InAppReceipt+ASN1Decodable.swift
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// TPInAppReceipt
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//
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// Created by Pavel Tikhonenko on 04/08/20.
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// Copyright © 2017-2021 Pavel Tikhonenko. All rights reserved.
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//
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import Foundation
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import ASN1Swift
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class _InAppReceipt
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{
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private var pkcs7container: PKCS7Container
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var payload: InAppReceiptPayload!
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init(rawData: Data) throws
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{
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let asn1decoder = ASN1Decoder()
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self.pkcs7container = try asn1decoder.decode(PKCS7Container.self, from: rawData)
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do
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{
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self.payload = try asn1decoder.decode(PayloadContainer.self, from: pkcs7container.signedData.contentInfo.payload.rawData).payload
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}catch{
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self.payload = try asn1decoder.decode(_PayloadContainer.self, from: pkcs7container.signedData.contentInfo.payload.rawData).payload
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}
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}
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}
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extension _InAppReceipt
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{
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var digestAlgorithm: SecKeyAlgorithm?
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{
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guard let algName = pkcs7container.signedData.alg.items.first?.algorithm else
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{
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return nil
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}
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guard let alg = OID(rawValue: algName)?.encryptionAlgorithm() else
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{
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return nil
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}
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return alg
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}
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var worldwideDeveloperCertificateData: Data?
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{
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let arr = pkcs7container.signedData.certificates.certificates
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guard arr.count >= 2 else
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{
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return nil
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}
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return arr[1].rawData
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}
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var signatureData: Data
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{
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return pkcs7container.signedData.signerInfos.encryptedDigest
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}
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var iTunesCertificateContainer: PKCS7Container.Certificate?
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{
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return pkcs7container.signedData.certificates.certificates.first
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}
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var iTunesCertificateData: Data?
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{
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return iTunesCertificateContainer?.rawData
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}
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var iTunesPublicKeyData: Data?
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{
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return iTunesCertificateContainer?.cert.subjectPublicKeyInfo
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}
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}
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extension InAppReceiptPayload: ASN1Decodable
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{
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static var template: ASN1Template
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{
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return ASN1Template.universal(ASN1Identifier.Tag.octetString)
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}
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enum CodingKeys: ASN1CodingKey
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{
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case set
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var template: ASN1Template
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{
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return ASN1Template.universal(ASN1Identifier.Tag.set).constructed()
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}
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}
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init(from decoder: Decoder) throws
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{
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let asn1d = decoder as! ASN1DecoderProtocol
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let rawData: Data = try asn1d.extractValueData()
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var bundleIdentifier = ""
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var bundleIdentifierData = Data()
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var appVersion = ""
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var originalAppVersion = ""
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var originalPurchaseDate: Date?
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var purchases = [InAppPurchase]()
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var opaqueValue = Data()
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var receiptHash = Data()
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var expirationDate: Date?
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var receiptCreationDate: Date!
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var ageRating: String = ""
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var environment: String = ""
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let c = try decoder.container(keyedBy: CodingKeys.self)
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var container = try c.nestedUnkeyedContainer(forKey: .set) as! ASN1UnkeyedDecodingContainerProtocol
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while !container.isAtEnd
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{
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do
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{
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var attributeContainer = try container.nestedUnkeyedContainer(for: ReceiptAttribute.template) as! ASN1UnkeyedDecodingContainerProtocol
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let type: Int32 = try attributeContainer.decode(Int32.self)
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let _ = try attributeContainer.skip(template: .universal(ASN1Identifier.Tag.integer)) // Consume
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var valueContainer = try attributeContainer.nestedUnkeyedContainer(for: .universal(ASN1Identifier.Tag.octetString)) as! ASN1UnkeyedDecodingContainerProtocol
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switch type
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{
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case InAppReceiptField.bundleIdentifier:
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bundleIdentifier = try valueContainer.decode(String.self)
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bundleIdentifierData = valueContainer.valueData
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case InAppReceiptField.appVersion:
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appVersion = try valueContainer.decode(String.self)
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case InAppReceiptField.opaqueValue:
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opaqueValue = valueContainer.valueData
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case InAppReceiptField.receiptHash:
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receiptHash = valueContainer.valueData
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case InAppReceiptField.inAppPurchaseReceipt:
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purchases.append(try valueContainer.decode(InAppPurchase.self))
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case InAppReceiptField.originalAppVersion:
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originalAppVersion = try valueContainer.decode(String.self)
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case InAppReceiptField.originalAppPurchaseDate:
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let originalPurchaseDateString = try valueContainer.decode(String.self, template: .universal(ASN1Identifier.Tag.ia5String))
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originalPurchaseDate = originalPurchaseDateString.rfc3339date()
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case InAppReceiptField.expirationDate:
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let expirationDateString = try valueContainer.decode(String.self, template: .universal(ASN1Identifier.Tag.ia5String))
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expirationDate = expirationDateString.rfc3339date()
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case InAppReceiptField.receiptCreationDate:
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let receiptCreationDateString = try valueContainer.decode(String.self, template: .universal(ASN1Identifier.Tag.ia5String))
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receiptCreationDate = receiptCreationDateString.rfc3339date()
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case InAppReceiptField.ageRating:
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ageRating = try valueContainer.decode(String.self, template: .universal(ASN1Identifier.Tag.ia5String))
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case InAppReceiptField.environment:
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environment = try valueContainer.decode(String.self)
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default:
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break
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}
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}catch{
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assertionFailure("Something wrong here")
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}
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}
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self.init(bundleIdentifier: bundleIdentifier,
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appVersion: appVersion,
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originalAppVersion: originalAppVersion,
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originalPurchaseDate: originalPurchaseDate,
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purchases: purchases,
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expirationDate: expirationDate,
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bundleIdentifierData: bundleIdentifierData,
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opaqueValue: opaqueValue,
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receiptHash: receiptHash,
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creationDate: receiptCreationDate,
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ageRating: ageRating,
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environment: environment,
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rawData: rawData)
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}
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}
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extension InAppPurchase: ASN1Decodable
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{
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public init(from decoder: Decoder) throws
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{
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var container = try decoder.unkeyedContainer() as! ASN1UnkeyedDecodingContainerProtocol
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var originalTransactionIdentifier = ""
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var productIdentifier = ""
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var transactionIdentifier = ""
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var purchaseDate: Date!
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var originalPurchaseDate: Date!
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while !container.isAtEnd
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{
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do
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{
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var attributeContainer = try container.nestedUnkeyedContainer(for: ReceiptAttribute.template) as! ASN1UnkeyedDecodingContainerProtocol
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let type: Int32 = try attributeContainer.decode(Int32.self)
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let _ = try attributeContainer.skip(template: .universal(ASN1Identifier.Tag.integer)) // Consume
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var valueContainer = try attributeContainer.nestedUnkeyedContainer(for: .universal(ASN1Identifier.Tag.octetString)) as! ASN1UnkeyedDecodingContainerProtocol
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switch type
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{
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case InAppReceiptField.quantity:
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quantity = try valueContainer.decode(Int.self)
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case InAppReceiptField.productIdentifier:
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productIdentifier = try valueContainer.decode(String.self)
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case InAppReceiptField.productType:
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productType = Type(rawValue: try valueContainer.decode(Int32.self)) ?? .unknown
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case InAppReceiptField.transactionIdentifier:
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transactionIdentifier = try valueContainer.decode(String.self)
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case InAppReceiptField.purchaseDate:
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let purchaseDateString = try valueContainer.decode(String.self, template: .universal(ASN1Identifier.Tag.ia5String))
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purchaseDate = purchaseDateString.rfc3339date()
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case InAppReceiptField.originalTransactionIdentifier:
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originalTransactionIdentifier = try valueContainer.decode(String.self)
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case InAppReceiptField.originalPurchaseDate:
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let originalPurchaseDateString = try valueContainer.decode(String.self, template: .universal(ASN1Identifier.Tag.ia5String))
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originalPurchaseDate = originalPurchaseDateString.rfc3339date()
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case InAppReceiptField.subscriptionExpirationDate:
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let str = try valueContainer.decode(String.self, template: .universal(ASN1Identifier.Tag.ia5String))
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let subscriptionExpirationDateString = str == "" ? nil : str
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subscriptionExpirationDate = subscriptionExpirationDateString?.rfc3339date()
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case InAppReceiptField.cancellationDate:
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let str = try valueContainer.decode(String.self, template: .universal(ASN1Identifier.Tag.ia5String))
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let cancellationDateString = str == "" ? nil : str
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cancellationDate = cancellationDateString?.rfc3339date()
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case InAppReceiptField.webOrderLineItemID:
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webOrderLineItemID = try valueContainer.decode(Int.self)
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case InAppReceiptField.subscriptionTrialPeriod:
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subscriptionTrialPeriod = (try valueContainer.decode(Int32.self)) != 0
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case InAppReceiptField.subscriptionIntroductoryPricePeriod:
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subscriptionIntroductoryPricePeriod = (try valueContainer.decode(Int32.self)) != 0
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case InAppReceiptField.promotionalOfferIdentifier:
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promotionalOfferIdentifier = try valueContainer.decode(String.self)
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default:
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break
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}
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}
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}
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self.originalTransactionIdentifier = originalTransactionIdentifier
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self.productIdentifier = productIdentifier
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self.transactionIdentifier = transactionIdentifier
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self.purchaseDate = purchaseDate
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self.originalPurchaseDate = originalPurchaseDate
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}
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public static var template: ASN1Template
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{
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return ASN1Template.universal(ASN1Identifier.Tag.set).constructed()
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}
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}
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struct ReceiptAttribute: ASN1Decodable
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{
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static var template: ASN1Template
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{
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return ASN1Template.universal(ASN1Identifier.Tag.sequence).constructed()
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}
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var type: Int
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var version: Int
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var value: Data
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enum CodingKeys: ASN1CodingKey
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{
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case type
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case version
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case value
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var template: ASN1Template
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{
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switch self
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{
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case .type:
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return .universal(ASN1Identifier.Tag.integer)
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case .version:
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return .universal(ASN1Identifier.Tag.integer)
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case .value:
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return .universal(ASN1Identifier.Tag.octetString)
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}
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}
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}
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}
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struct PayloadContainer: ASN1Decodable
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{
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var payload: InAppReceiptPayload
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static var template: ASN1Template
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{
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return ASN1Template.contextSpecific(0).constructed().explicit(tag: ASN1Identifier.Tag.octetString).constructed()
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}
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enum CodingKeys: ASN1CodingKey
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{
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case payload
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var template: ASN1Template
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{
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switch self
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{
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case .payload:
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return InAppReceiptPayload.template
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}
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}
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}
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}
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/// Legacy payload format
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struct _PayloadContainer: ASN1Decodable
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{
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var payload: InAppReceiptPayload
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static var template: ASN1Template
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{
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return ASN1Template.contextSpecific(0).constructed()
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}
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enum CodingKeys: ASN1CodingKey
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{
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case payload
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var template: ASN1Template
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{
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switch self
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{
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case .payload:
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return InAppReceiptPayload.template
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}
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}
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}
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}
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