AsnEncodedData.Oid 屬性
定義
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
取得或設定 Oid 物件的 AsnEncodedData 值。
public:
property System::Security::Cryptography::Oid ^ Oid { System::Security::Cryptography::Oid ^ get(); void set(System::Security::Cryptography::Oid ^ value); };
public System.Security.Cryptography.Oid? Oid { get; set; }
public System.Security.Cryptography.Oid Oid { get; set; }
member this.Oid : System.Security.Cryptography.Oid with get, set
Public Property Oid As Oid
屬性值
Oid 物件。
範例
下列程式碼範例示範如何使用 AsnEncodedData 類別。
#using <System.dll>
#using <System.Security.dll>
using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Security::Cryptography::X509Certificates;
int main()
{
//The following example demonstrates the usage of the AsnEncodedData classes.
// Asn encoded data is read from the extensions of an X509 certificate.
try
{
// Open the certificate store.
X509Store^ store = gcnew X509Store( L"MY",StoreLocation::CurrentUser );
store->Open( static_cast<OpenFlags>(OpenFlags::ReadOnly | OpenFlags::OpenExistingOnly) );
X509Certificate2Collection^ collection = dynamic_cast<X509Certificate2Collection^>(store->Certificates);
X509Certificate2Collection^ fcollection = dynamic_cast<X509Certificate2Collection^>(collection->Find( X509FindType::FindByTimeValid, DateTime::Now, false ));
// Select one or more certificates to display extensions information.
X509Certificate2Collection^ scollection = X509Certificate2UI::SelectFromCollection(fcollection, L"Certificate Select",L"Select certificates from the following list to get extension information on that certificate",X509SelectionFlag::MultiSelection);
// Create a new AsnEncodedDataCollection object.
AsnEncodedDataCollection^ asncoll = gcnew AsnEncodedDataCollection;
for ( int i = 0; i < scollection->Count; i++ )
{
// Display certificate information.
Console::ForegroundColor = ConsoleColor::Red;
Console::WriteLine( L"Certificate name: {0}", scollection[i]->GetName() );
Console::ResetColor();
// Display extensions information.
System::Collections::IEnumerator^ myEnum = scollection[i]->Extensions->GetEnumerator();
while ( myEnum->MoveNext() )
{
X509Extension^ extension = safe_cast<X509Extension ^>(myEnum->Current);
// Create an AsnEncodedData object using the extensions information.
AsnEncodedData^ asndata = gcnew AsnEncodedData( extension->Oid,extension->RawData );
Console::ForegroundColor = ConsoleColor::Green;
Console::WriteLine( L"Extension type: {0}", extension->Oid->FriendlyName );
Console::WriteLine( L"Oid value: {0}", asndata->Oid->Value );
Console::WriteLine( L"Raw data length: {0} {1}", asndata->RawData->Length, Environment::NewLine );
Console::ResetColor();
Console::WriteLine( asndata->Format(true) );
Console::WriteLine( Environment::NewLine );
// Add the AsnEncodedData object to the AsnEncodedDataCollection object.
asncoll->Add( asndata );
}
Console::WriteLine( Environment::NewLine );
}
Console::ForegroundColor = ConsoleColor::Red;
Console::WriteLine( L"Number of AsnEncodedData items in the collection: {0} {1}", asncoll->Count, Environment::NewLine );
Console::ResetColor();
store->Close();
//Create an enumerator for moving through the collection.
AsnEncodedDataEnumerator^ asne = asncoll->GetEnumerator();
//You must execute a MoveNext() to get to the first item in the collection.
asne->MoveNext();
// Write out AsnEncodedData in the collection.
Console::ForegroundColor = ConsoleColor::Blue;
Console::WriteLine( L"First AsnEncodedData in the collection: {0}", asne->Current->Format(true) );
Console::ResetColor();
asne->MoveNext();
Console::ForegroundColor = ConsoleColor::DarkBlue;
Console::WriteLine( L"Second AsnEncodedData in the collection: {0}", asne->Current->Format(true) );
Console::ResetColor();
//Return index in the collection to the beginning.
asne->Reset();
}
catch ( CryptographicException^ )
{
Console::WriteLine( L"Information could not be written out for this certificate." );
}
return 1;
}
using System;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
class AsnEncodedDataSample
{
static void Main()
{
//The following example demonstrates the usage the AsnEncodedData classes.
// Asn encoded data is read from the extensions of an X509 certificate.
try
{
// Open the certificate store.
X509Store store = new X509Store("MY", StoreLocation.CurrentUser);
store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);
X509Certificate2Collection collection = (X509Certificate2Collection)store.Certificates;
X509Certificate2Collection fcollection = (X509Certificate2Collection)collection.Find(X509FindType.FindByTimeValid, DateTime.Now, false);
// Select one or more certificates to display extensions information.
X509Certificate2Collection scollection = X509Certificate2UI.SelectFromCollection(fcollection, "Certificate Select", "Select certificates from the following list to get extension information on that certificate", X509SelectionFlag.MultiSelection);
// Create a new AsnEncodedDataCollection object.
AsnEncodedDataCollection asncoll = new AsnEncodedDataCollection();
for (int i = 0; i < scollection.Count; i++)
{
// Display certificate information.
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Certificate name: {0}", scollection[i].GetName());
Console.ResetColor();
// Display extensions information.
foreach (X509Extension extension in scollection[i].Extensions)
{
// Create an AsnEncodedData object using the extensions information.
AsnEncodedData asndata = new AsnEncodedData(extension.Oid, extension.RawData);
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("Extension type: {0}", extension.Oid.FriendlyName);
Console.WriteLine("Oid value: {0}",asndata.Oid.Value);
Console.WriteLine("Raw data length: {0} {1}", asndata.RawData.Length, Environment.NewLine);
Console.ResetColor();
Console.WriteLine(asndata.Format(true));
Console.WriteLine(Environment.NewLine);
// Add the AsnEncodedData object to the AsnEncodedDataCollection object.
asncoll.Add(asndata);
}
Console.WriteLine(Environment.NewLine);
}
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Number of AsnEncodedData items in the collection: {0} {1}", asncoll.Count, Environment.NewLine);
Console.ResetColor();
store.Close();
//Create an enumerator for moving through the collection.
AsnEncodedDataEnumerator asne = asncoll.GetEnumerator();
//You must execute a MoveNext() to get to the first item in the collection.
asne.MoveNext();
// Write out AsnEncodedData in the collection.
Console.ForegroundColor = ConsoleColor.Blue;
Console.WriteLine("First AsnEncodedData in the collection: {0}", asne.Current.Format(true));
Console.ResetColor();
asne.MoveNext();
Console.ForegroundColor = ConsoleColor.DarkBlue;
Console.WriteLine("Second AsnEncodedData in the collection: {0}", asne.Current.Format(true));
Console.ResetColor();
//Return index in the collection to the beginning.
asne.Reset();
}
catch (CryptographicException)
{
Console.WriteLine("Information could not be written out for this certificate.");
}
}
}
Imports System.Security.Cryptography
Imports System.Security.Cryptography.X509Certificates
Class AsnEncodedDataSample
Shared msg As String
Shared Sub Main()
'The following example demonstrates the usage the AsnEncodedData classes.
' Asn encoded data is read from the extensions of an X509 certificate.
Try
' Open the certificate store.
Dim store As New X509Store("MY", StoreLocation.CurrentUser)
store.Open((OpenFlags.ReadOnly Or OpenFlags.OpenExistingOnly))
Dim collection As X509Certificate2Collection = CType(store.Certificates, X509Certificate2Collection)
Dim fcollection As X509Certificate2Collection = CType(collection.Find(X509FindType.FindByTimeValid, DateTime.Now, False), X509Certificate2Collection)
' Select one or more certificates to display extensions information.
Dim scollection As X509Certificate2Collection = X509Certificate2UI.SelectFromCollection(fcollection, "Certificate Select", "Select certificates from the following list to get extension information on that certificate", X509SelectionFlag.MultiSelection)
' Create a new AsnEncodedDataCollection object.
Dim asncoll As New AsnEncodedDataCollection()
Dim i As Integer
For i = 0 To scollection.Count - 1
' Display certificate information.
msg = "Certificate name: "& scollection(i).GetName()
MsgBox(msg)
' Display extensions information.
Dim extension As X509Extension
For Each extension In scollection(i).Extensions
' Create an AsnEncodedData object using the extensions information.
Dim asndata As New AsnEncodedData(extension.Oid, extension.RawData)
msg = "Extension type: " & extension.Oid.FriendlyName & Environment.NewLine & "Oid value: " & asndata.Oid.Value _
& Environment.NewLine & "Raw data length: " & asndata.RawData.Length & Environment.NewLine _
& asndata.Format(True) & Environment.NewLine
MsgBox(msg)
' Add the AsnEncodedData object to the AsnEncodedDataCollection object.
asncoll.Add(asndata)
Next extension
Next i
msg = "Number of AsnEncodedData items in the collection: " & asncoll.Count
MsgBox(msg)
store.Close()
'Create an enumerator for moving through the collection.
Dim asne As AsnEncodedDataEnumerator = asncoll.GetEnumerator()
'You must execute a MoveNext() to get to the first item in the collection.
asne.MoveNext()
' Write out AsnEncodedData in the collection.
msg = "First AsnEncodedData in the collection: " & asne.Current.Format(True)
MsgBox(msg)
asne.MoveNext()
msg = "Second AsnEncodedData in the collection: " & asne.Current.Format(True)
MsgBox(msg)
'Return index in the collection to the beginning.
asne.Reset()
Catch
MsgBox("Information could not be written out for this certificate.")
End Try
End Sub
End Class
備註
這個屬性可用來提供抽象語法表示法一 (ASN.1) 編碼數據的相關信息,例如用來加密數據的演算法。
適用於
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