我有带有应用内商品的Xamarin iOS应用。我得到base64编码的应用程序收据:
NSUrl receiptURL = NSBundle.MainBundle.AppStoreReceiptUrl;
String receiptData = receipt.GetBase64EncodedString(0);
根据Apple文档7.0+，应用程序收据使用ASN1包装在PKCS7容器中。当我将其发送到Apple服务器时，它将以JSON返回收据。但是我想在本地解析它，以了解iaps用户已经拥有了什么。我不需要验证，因为Apple远程进行验证，我只需要获取购买的inap的收据。
到目前为止，作为一项调查，我已经使用phpseclib在php中对其进行了解析，手动(不知道如何以编程方式执行此操作)定位了收据并也对其进行了解析。
$asn_parser = new File_ASN1();
//parse the receipt binary string
$pkcs7 = $asn_parser->decodeBER(base64_decode($f));
//print_r($pkcs7);
$payload_sequence = $pkcs7[0]['content'][1]['content'][0]['content'][2]['content'];
$pld = $asn_parser->decodeBER($payload_sequence[1]['content'][0]['content']);
//print_r($pld);
$prd = $asn_parser->decodeBER($pld[0]['content'][21]['content'][2]['content']);
print_r($prd);
但是即使这样，我仍然有一些混乱的属性，每个属性看起来像:
Array
(
[start] => 271
[headerlength] => 2
[type] => 4
[content] => 2016-08-22T13:22:00Z
[length] => 24
)
它不是人类可读的，我需要类似的东西(Apple返回的带有print_r的输出):
[receipt] => Array
(
[receipt_type] => ProductionSandbox
[adam_id] => 0
[app_item_id] => 0
[bundle_id] => com.my.test.app.iOS
...
[in_app] => Array
(
[0] => Array
(
[quantity] => 1
[product_id] => test_iap_1
[transaction_id] => 1000000230806171
...
[is_trial_period] => false
)
)
)
事情似乎太复杂了，我简直不敢相信开箱收据就这么复杂。有人知道如何管理吗？我找到了this post，但是库是用Objective-C编写的，不适用于我当前的环境。我会说这个lib的来源使我感到害怕:这么多复杂的代码只是用来解包标准容器。我的意思是使用json，bson等非常容易，但不是asn1。
最佳答案
最后，我使用Liping Dai LCLib(lipingshare.com)打开了包装。 Asn1Parser返回带有根节点的类DOM树-非常方便的lib。
public class AppleAppReceipt
{
public class AppleInAppPurchaseReceipt
{
public int Quantity;
public string ProductIdentifier;
public string TransactionIdentifier;
public DateTime PurchaseDate;
public string OriginalTransactionIdentifier;
public DateTime OriginalPurchaseDate;
public DateTime SubscriptionExpirationDate;
public DateTime CancellationDate;
public int WebOrderLineItemID;
}
const int AppReceiptASN1TypeBundleIdentifier = 2;
const int AppReceiptASN1TypeAppVersion = 3;
const int AppReceiptASN1TypeOpaqueValue = 4;
const int AppReceiptASN1TypeHash = 5;
const int AppReceiptASN1TypeReceiptCreationDate = 12;
const int AppReceiptASN1TypeInAppPurchaseReceipt = 17;
const int AppReceiptASN1TypeOriginalAppVersion = 19;
const int AppReceiptASN1TypeReceiptExpirationDate = 21;
const int AppReceiptASN1TypeQuantity = 1701;
const int AppReceiptASN1TypeProductIdentifier = 1702;
const int AppReceiptASN1TypeTransactionIdentifier = 1703;
const int AppReceiptASN1TypePurchaseDate = 1704;
const int AppReceiptASN1TypeOriginalTransactionIdentifier = 1705;
const int AppReceiptASN1TypeOriginalPurchaseDate = 1706;
const int AppReceiptASN1TypeSubscriptionExpirationDate = 1708;
const int AppReceiptASN1TypeWebOrderLineItemID = 1711;
const int AppReceiptASN1TypeCancellationDate = 1712;
public string BundleIdentifier;
public string AppVersion;
public string OriginalAppVersion; //какую покупали
public DateTime ReceiptCreationDate;
public Dictionary<string, AppleInAppPurchaseReceipt> PurchaseReceipts;
public bool parseAsn1Data(byte[] val)
{
if (val == null)
return false;
Asn1Parser p = new Asn1Parser();
var stream = new MemoryStream(val);
try
{
p.LoadData(stream);
}
catch (Exception e)
{
return false;
}
Asn1Node root = p.RootNode;
if (root == null)
return false;
PurchaseReceipts = new Dictionary<string, AppleInAppPurchaseReceipt>();
parseNodeRecursive(root);
return !string.IsNullOrEmpty(BundleIdentifier);
}
private static string getStringFromSubNode(Asn1Node nn)
{
string dataStr = null;
if ((nn.Tag & Asn1Tag.TAG_MASK) == Asn1Tag.OCTET_STRING && nn.ChildNodeCount > 0)
{
Asn1Node n = nn.GetChildNode(0);
switch (n.Tag & Asn1Tag.TAG_MASK)
{
case Asn1Tag.PRINTABLE_STRING:
case Asn1Tag.IA5_STRING:
case Asn1Tag.UNIVERSAL_STRING:
case Asn1Tag.VISIBLE_STRING:
case Asn1Tag.NUMERIC_STRING:
case Asn1Tag.UTC_TIME:
case Asn1Tag.UTF8_STRING:
case Asn1Tag.BMPSTRING:
case Asn1Tag.GENERAL_STRING:
case Asn1Tag.GENERALIZED_TIME:
{
if ((n.Tag & Asn1Tag.TAG_MASK) == Asn1Tag.UTF8_STRING)
{
UTF8Encoding unicode = new UTF8Encoding();
dataStr = unicode.GetString(n.Data);
}
else
{
dataStr = Asn1Util.BytesToString(n.Data);
}
}
break;
}
}
return dataStr;
}
private static DateTime getDateTimeFromSubNode(Asn1Node nn)
{
string dataStr = getStringFromSubNode(nn);
if (string.IsNullOrEmpty(dataStr))
return DateTime.MinValue;
DateTime retval = DateTime.MaxValue;
try
{
retval = DateTime.Parse(dataStr);
}
catch (Exception e)
{
}
return retval;
}
private static int getIntegerFromSubNode(Asn1Node nn)
{
int retval = -1;
if ((nn.Tag & Asn1Tag.TAG_MASK) == Asn1Tag.OCTET_STRING && nn.ChildNodeCount > 0)
{
Asn1Node n = nn.GetChildNode(0);
if ((n.Tag & Asn1Tag.TAG_MASK) == Asn1Tag.INTEGER)
retval = (int)Asn1Util.BytesToLong(n.Data);
}
return retval;
}
private void parseNodeRecursive(Asn1Node tNode)
{
bool processed_node = false;
if ((tNode.Tag & Asn1Tag.TAG_MASK) == Asn1Tag.SEQUENCE && tNode.ChildNodeCount == 3)
{
Asn1Node node1 = tNode.GetChildNode(0);
Asn1Node node2 = tNode.GetChildNode(1);
Asn1Node node3 = tNode.GetChildNode(2);
if ((node1.Tag & Asn1Tag.TAG_MASK) == Asn1Tag.INTEGER && (node2.Tag & Asn1Tag.TAG_MASK) == Asn1Tag.INTEGER &&
(node3.Tag & Asn1Tag.TAG_MASK) == Asn1Tag.OCTET_STRING)
{
processed_node = true;
int type = (int)Asn1Util.BytesToLong(node1.Data);
switch (type)
{
case AppReceiptASN1TypeBundleIdentifier:
BundleIdentifier = getStringFromSubNode(node3);
break;
case AppReceiptASN1TypeAppVersion:
AppVersion = getStringFromSubNode(node3);
break;
case AppReceiptASN1TypeOpaqueValue:
break;
case AppReceiptASN1TypeHash:
break;
case AppReceiptASN1TypeOriginalAppVersion:
OriginalAppVersion = getStringFromSubNode(node3);
break;
case AppReceiptASN1TypeReceiptExpirationDate:
break;
case AppReceiptASN1TypeReceiptCreationDate:
ReceiptCreationDate = getDateTimeFromSubNode(node3);
break;
case AppReceiptASN1TypeInAppPurchaseReceipt:
{
if (node3.ChildNodeCount > 0)
{
Asn1Node node31 = node3.GetChildNode(0);
if ((node31.Tag & Asn1Tag.TAG_MASK) == Asn1Tag.SET && node31.ChildNodeCount > 0)
{
AppleInAppPurchaseReceipt receipt = new AppleInAppPurchaseReceipt();
for (int i = 0; i < node31.ChildNodeCount; i++)
{
Asn1Node node311 = node31.GetChildNode(i);
if ((node311.Tag & Asn1Tag.TAG_MASK) == Asn1Tag.SEQUENCE && node311.ChildNodeCount == 3)
{
Asn1Node node3111 = node311.GetChildNode(0);
Asn1Node node3112 = node311.GetChildNode(1);
Asn1Node node3113 = node311.GetChildNode(2);
if ((node3111.Tag & Asn1Tag.TAG_MASK) == Asn1Tag.INTEGER && (node3112.Tag & Asn1Tag.TAG_MASK) == Asn1Tag.INTEGER &&
(node3113.Tag & Asn1Tag.TAG_MASK) == Asn1Tag.OCTET_STRING)
{
int type1 = (int)Asn1Util.BytesToLong(node3111.Data);
switch (type1)
{
case AppReceiptASN1TypeQuantity:
receipt.Quantity = getIntegerFromSubNode(node3113);
break;
case AppReceiptASN1TypeProductIdentifier:
receipt.ProductIdentifier = getStringFromSubNode(node3113);
break;
case AppReceiptASN1TypeTransactionIdentifier:
receipt.TransactionIdentifier = getStringFromSubNode(node3113);
break;
case AppReceiptASN1TypePurchaseDate:
receipt.PurchaseDate = getDateTimeFromSubNode(node3113);
break;
case AppReceiptASN1TypeOriginalTransactionIdentifier:
receipt.OriginalTransactionIdentifier = getStringFromSubNode(node3113);
break;
case AppReceiptASN1TypeOriginalPurchaseDate:
receipt.OriginalPurchaseDate = getDateTimeFromSubNode(node3113);
break;
case AppReceiptASN1TypeSubscriptionExpirationDate:
receipt.SubscriptionExpirationDate = getDateTimeFromSubNode(node3113);
break;
case AppReceiptASN1TypeWebOrderLineItemID:
receipt.WebOrderLineItemID = getIntegerFromSubNode(node3113);
break;
case AppReceiptASN1TypeCancellationDate:
receipt.CancellationDate = getDateTimeFromSubNode(node3113);
break;
}
}
}
}
if (!string.IsNullOrEmpty(receipt.ProductIdentifier))
PurchaseReceipts.Add(receipt.ProductIdentifier, receipt);
}
}
}
break;
default:
processed_node = false;
break;
}
}
}
if (!processed_node)
{
for (int i = 0; i < tNode.ChildNodeCount; i++)
{
Asn1Node chld = tNode.GetChildNode(i);
if (chld != null)
parseNodeRecursive(chld);
}
}
}
}
和用法:
public void printAppReceipt()
{
NSUrl receiptURL = NSBundle.MainBundle.AppStoreReceiptUrl;
if (receiptURL != null)
{
Console.WriteLine("receiptUrl='" + receiptURL + "'");
NSData receipt = NSData.FromUrl(receiptURL);
if (receipt != null)
{
byte[] rbytes = receipt.ToArray();
AppleAppReceipt apprec = new AppleAppReceipt();
if (apprec.parseAsn1Data(rbytes))
{
Console.WriteLine("Received receipt for " + apprec.BundleIdentifier + " with " + apprec.PurchaseReceipts.Count +
" products");
Console.WriteLine(JsonConvert.SerializeObject(apprec,Formatting.Indented));
}
}
else
Console.WriteLine("receipt == null");
}
}
关于c# - 使用C#和PHP解压iOS应用收据，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/39084651/