RightsManagementInformation.CryptoProvider Eigenschaft

Definition

Namespace:

System.IO.Packaging

Assembly:

WindowsBase.dll

Ruft den CryptoProvider für den Zugriff auf den verschlüsselten Datenstream zur Rechteverwaltung des Pakets ab oder legt diesen fest.

public:
 property System::Security::RightsManagement::CryptoProvider ^ CryptoProvider { System::Security::RightsManagement::CryptoProvider ^ get(); void set(System::Security::RightsManagement::CryptoProvider ^ value); };

public System.Security.RightsManagement.CryptoProvider CryptoProvider { get; set; }

member this.CryptoProvider : System.Security.RightsManagement.CryptoProvider with get, set

Public Property CryptoProvider As CryptoProvider

Eigenschaftswert

CryptoProvider

Der CryptoProvider für den Zugriff auf Rechteverwaltungsinformationen.

Beispiele

Im folgenden Beispiel wird das Festlegen der CryptoProvider-Eigenschaft veranschaulicht.

ShowStatus("   Binding UseLicense with the SecureEnvironment" +
         "\n       to obtain the CryptoProvider.");
rmi.CryptoProvider = useLicense.Bind(_secureEnv);

ShowStatus("   Obtaining BoundGrants.");
grants = rmi.CryptoProvider.BoundGrants;

// You can access the Package via GetPackage() at this point.

rightsBlock.Text = "GRANTS LIST\n-----------\n";
foreach (ContentGrant grant in grants)
{
    rightsBlock.Text += "USER  :" + grant.User.Name + " [" +
        grant.User.AuthenticationType + "]\n";
    rightsBlock.Text += "RIGHT :" + grant.Right.ToString()+"\n";
    rightsBlock.Text += "    From:  " + grant.ValidFrom + "\n";
    rightsBlock.Text += "    Until: " + grant.ValidUntil + "\n";
}

ShowStatus("   Binding UseLicense with the SecureEnvironment" & vbLf & "       to obtain the CryptoProvider.")
rmi.CryptoProvider = useLicense.Bind(_secureEnv)

ShowStatus("   Obtaining BoundGrants.")
grants = rmi.CryptoProvider.BoundGrants

' You can access the Package via GetPackage() at this point.

rightsBlock.Text = "GRANTS LIST" & vbLf & "-----------" & vbLf
For Each grant As ContentGrant In grants
    rightsBlock.Text &= "USER  :" & grant.User.Name & " [" & grant.User.AuthenticationType & "]" & vbLf
    rightsBlock.Text &= "RIGHT :" & grant.Right.ToString()+vbLf
    rightsBlock.Text &= "    From:  " & grant.ValidFrom & vbLf
    rightsBlock.Text &= "    Until: " & grant.ValidUntil & vbLf
Next grant

Im folgenden Beispiel wird der Zugriff auf die CryptoProvider-Eigenschaft veranschaulicht.

if (rmi.CryptoProvider.CanDecrypt == true)
    ShowStatus("   Decryption granted.");
else
    ShowStatus("   CANNOT DECRYPT!");

ShowStatus("   Getting the Package from\n" +
           "      the EncryptedPackage.");
_xpsPackage = ePackage.GetPackage();
if (_xpsPackage == null)
{
    MessageBox.Show("Unable to get Package.");
    return false;
}

// Set a PackageStore Uri reference for the encrypted stream.
// ("sdk://packLocation" is a pseudo URI used by
//  PackUriHelper.Create to define the parserContext.BaseURI
//  that XamlReader uses to access the encrypted data stream.)
Uri packageUri = new Uri(@"sdk://packLocation", UriKind.Absolute);
// Add the URI package
PackageStore.AddPackage(packageUri, _xpsPackage);
// Determine the starting part for the package.
PackagePart startingPart = GetPackageStartingPart(_xpsPackage);

// Set the DocViewer.Document property.
ShowStatus("   Opening in DocumentViewer.");
ParserContext parserContext = new ParserContext();
parserContext.BaseUri = PackUriHelper.Create(
                            packageUri, startingPart.Uri);
parserContext.XamlTypeMapper = XamlTypeMapper.DefaultMapper;
DocViewer.Document = XamlReader.Load(
    startingPart.GetStream(), parserContext)
        as IDocumentPaginatorSource;

// Enable document menu controls.
menuFileClose.IsEnabled = true;
menuFilePrint.IsEnabled = true;
menuViewIncreaseZoom.IsEnabled = true;
menuViewDecreaseZoom.IsEnabled = true;

// Give the DocumentViewer focus.
DocViewer.Focus();

If rmi.CryptoProvider.CanDecrypt = True Then
    ShowStatus("   Decryption granted.")
Else
    ShowStatus("   CANNOT DECRYPT!")
End If

ShowStatus("   Getting the Package from" & vbLf & "      the EncryptedPackage.")
_xpsPackage = ePackage.GetPackage()
If _xpsPackage Is Nothing Then
    MessageBox.Show("Unable to get Package.")
    Return False
End If

' Set a PackageStore Uri reference for the encrypted stream.
' ("sdk://packLocation" is a pseudo URI used by
'  PackUriHelper.Create to define the parserContext.BaseURI
'  that XamlReader uses to access the encrypted data stream.)
Dim packageUri As New Uri("sdk://packLocation", UriKind.Absolute)
' Add the URI package
PackageStore.AddPackage(packageUri, _xpsPackage)
' Determine the starting part for the package.
Dim startingPart As PackagePart = GetPackageStartingPart(_xpsPackage)

' Set the DocViewer.Document property.
ShowStatus("   Opening in DocumentViewer.")
Dim parserContext As New ParserContext()
parserContext.BaseUri = PackUriHelper.Create(packageUri, startingPart.Uri)
parserContext.XamlTypeMapper = XamlTypeMapper.DefaultMapper
DocViewerProperty.Document = TryCast(XamlReader.Load(startingPart.GetStream(), parserContext), IDocumentPaginatorSource)

' Enable document menu controls.
menuFileClose.IsEnabled = True
menuFilePrint.IsEnabled = True
menuViewIncreaseZoom.IsEnabled = True
menuViewDecreaseZoom.IsEnabled = True

' Give the DocumentViewer focus.
DocViewerProperty.Focus()