EncryptedPackageEnvelope.CreateFromPackage Method

Reference

Definition

Namespace:: System.IO.Packaging

Assembly:: WindowsBase.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Creates and returns an EncryptedPackageEnvelope that uses an existing unencrypted package as the source of its content.

Overloads

CreateFromPackage(Stream, Stream, PublishLicense, CryptoProvider)	Creates and returns an EncryptedPackageEnvelope (on the specified stream) that uses the specified unencrypted package as its content.
CreateFromPackage(String, Stream, PublishLicense, CryptoProvider)	Creates and returns an EncryptedPackageEnvelope that uses the specified unencrypted package as its content, and gives it the specified file name.

Examples

The following example shows how to use the CreateFromPackage method to instantiate an EncryptedPackageEnvelope.

WriteStatus("   Signing the UnsignedPublishLicense\n" +
            "       to build the PublishLicense.");
UseLicense authorsUseLicense;
PublishLicense publishLicense =
    unsignedLicense.Sign(_secureEnv, out authorsUseLicense);

WriteStatus("   Binding the author's UseLicense and");
WriteStatus("       obtaining the CryptoProvider.");
CryptoProvider cryptoProvider = authorsUseLicense.Bind(_secureEnv);

WriteStatus("   Creating the EncryptedPackage.");
Stream packageStream = File.OpenRead(packageFile);
EncryptedPackageEnvelope ePackage =
    EncryptedPackageEnvelope.CreateFromPackage(encryptedFile,
        packageStream, publishLicense, cryptoProvider);

WriteStatus("   Adding an author's UseLicense.");
RightsManagementInformation rmi =
    ePackage.RightsManagementInformation;
rmi.SaveUseLicense(author, authorsUseLicense);

ePackage.Close();
WriteStatus("   Done - Package encryption complete.");

WriteStatus("Verifying package encryption.");
if (EncryptedPackageEnvelope.IsEncryptedPackageEnvelope(encryptedFile))
{
    WriteStatus("   Confirmed - '" + encryptedFilename +
                "' is encrypted.");
}
else
{
    MessageBox.Show("ERROR: '" + encryptedFilename +
        "' is NOT ENCRYPTED.", "Encryption Error",
        MessageBoxButton.OK, MessageBoxImage.Error);
    WriteStatus("ERROR: '" + encryptedFilename +
                "' is NOT ENCRYPTED.\n");
    return false;
}

WriteStatus("   Signing the UnsignedPublishLicense" & vbLf & "       to build the PublishLicense.")
Dim authorsUseLicense As UseLicense = Nothing
Dim publishLicense As PublishLicense = unsignedLicense.Sign(_secureEnv, authorsUseLicense)

WriteStatus("   Binding the author's UseLicense and")
WriteStatus("       obtaining the CryptoProvider.")
Dim cryptoProvider As CryptoProvider = authorsUseLicense.Bind(_secureEnv)

WriteStatus("   Creating the EncryptedPackage.")
Dim packageStream As Stream = File.OpenRead(packageFile)
Dim ePackage As EncryptedPackageEnvelope = EncryptedPackageEnvelope.CreateFromPackage(encryptedFile, packageStream, publishLicense, cryptoProvider)

WriteStatus("   Adding an author's UseLicense.")
Dim rmi As RightsManagementInformation = ePackage.RightsManagementInformation
rmi.SaveUseLicense(author, authorsUseLicense)

ePackage.Close()
WriteStatus("   Done - Package encryption complete.")

WriteStatus("Verifying package encryption.")
If EncryptedPackageEnvelope.IsEncryptedPackageEnvelope(encryptedFile) Then
    WriteStatus("   Confirmed - '" & encryptedFilename & "' is encrypted.")
Else
    MessageBox.Show("ERROR: '" & encryptedFilename & "' is NOT ENCRYPTED.", "Encryption Error", MessageBoxButton.OK, MessageBoxImage.Error)
    WriteStatus("ERROR: '" & encryptedFilename & "' is NOT ENCRYPTED." & vbLf)
    Return False
End If

CreateFromPackage(Stream, Stream, PublishLicense, CryptoProvider)

Creates and returns an EncryptedPackageEnvelope (on the specified stream) that uses the specified unencrypted package as its content.

public:
 static System::IO::Packaging::EncryptedPackageEnvelope ^ CreateFromPackage(System::IO::Stream ^ envelopeStream, System::IO::Stream ^ packageStream, System::Security::RightsManagement::PublishLicense ^ publishLicense, System::Security::RightsManagement::CryptoProvider ^ cryptoProvider);

public static System.IO.Packaging.EncryptedPackageEnvelope CreateFromPackage (System.IO.Stream envelopeStream, System.IO.Stream packageStream, System.Security.RightsManagement.PublishLicense publishLicense, System.Security.RightsManagement.CryptoProvider cryptoProvider);

static member CreateFromPackage : System.IO.Stream * System.IO.Stream * System.Security.RightsManagement.PublishLicense * System.Security.RightsManagement.CryptoProvider -> System.IO.Packaging.EncryptedPackageEnvelope

Public Shared Function CreateFromPackage (envelopeStream As Stream, packageStream As Stream, publishLicense As PublishLicense, cryptoProvider As CryptoProvider) As EncryptedPackageEnvelope

Parameters

envelopeStream: Stream

The stream on which to create the file.

packageStream: Stream

The stream representing the existing unencrypted package.

publishLicense: PublishLicense

The publish license that is embedded in the compound file.

cryptoProvider: CryptoProvider

An object that determines what operations the current user is allowed to perform on the encrypted content.

Returns

EncryptedPackageEnvelope

The newly created EncryptedPackageEnvelope.

Exceptions

ArgumentNullException

envelopeStream or packageStream is null.

NotSupportedException

envelopeStream does not provide read/write access.

Examples

The following example shows how to use the CreateFromPackage method to instantiate an EncryptedPackageEnvelope.

WriteStatus("   Signing the UnsignedPublishLicense\n" +
            "       to build the PublishLicense.");
UseLicense authorsUseLicense;
PublishLicense publishLicense =
    unsignedLicense.Sign(_secureEnv, out authorsUseLicense);

WriteStatus("   Binding the author's UseLicense and");
WriteStatus("       obtaining the CryptoProvider.");
CryptoProvider cryptoProvider = authorsUseLicense.Bind(_secureEnv);

WriteStatus("   Creating the EncryptedPackage.");
Stream packageStream = File.OpenRead(packageFile);
EncryptedPackageEnvelope ePackage =
    EncryptedPackageEnvelope.CreateFromPackage(encryptedFile,
        packageStream, publishLicense, cryptoProvider);

WriteStatus("   Adding an author's UseLicense.");
RightsManagementInformation rmi =
    ePackage.RightsManagementInformation;
rmi.SaveUseLicense(author, authorsUseLicense);

ePackage.Close();
WriteStatus("   Done - Package encryption complete.");

WriteStatus("Verifying package encryption.");
if (EncryptedPackageEnvelope.IsEncryptedPackageEnvelope(encryptedFile))
{
    WriteStatus("   Confirmed - '" + encryptedFilename +
                "' is encrypted.");
}
else
{
    MessageBox.Show("ERROR: '" + encryptedFilename +
        "' is NOT ENCRYPTED.", "Encryption Error",
        MessageBoxButton.OK, MessageBoxImage.Error);
    WriteStatus("ERROR: '" + encryptedFilename +
                "' is NOT ENCRYPTED.\n");
    return false;
}

WriteStatus("   Signing the UnsignedPublishLicense" & vbLf & "       to build the PublishLicense.")
Dim authorsUseLicense As UseLicense = Nothing
Dim publishLicense As PublishLicense = unsignedLicense.Sign(_secureEnv, authorsUseLicense)

WriteStatus("   Binding the author's UseLicense and")
WriteStatus("       obtaining the CryptoProvider.")
Dim cryptoProvider As CryptoProvider = authorsUseLicense.Bind(_secureEnv)

WriteStatus("   Creating the EncryptedPackage.")
Dim packageStream As Stream = File.OpenRead(packageFile)
Dim ePackage As EncryptedPackageEnvelope = EncryptedPackageEnvelope.CreateFromPackage(encryptedFile, packageStream, publishLicense, cryptoProvider)

WriteStatus("   Adding an author's UseLicense.")
Dim rmi As RightsManagementInformation = ePackage.RightsManagementInformation
rmi.SaveUseLicense(author, authorsUseLicense)

ePackage.Close()
WriteStatus("   Done - Package encryption complete.")

WriteStatus("Verifying package encryption.")
If EncryptedPackageEnvelope.IsEncryptedPackageEnvelope(encryptedFile) Then
    WriteStatus("   Confirmed - '" & encryptedFilename & "' is encrypted.")
Else
    MessageBox.Show("ERROR: '" & encryptedFilename & "' is NOT ENCRYPTED.", "Encryption Error", MessageBoxButton.OK, MessageBoxImage.Error)
    WriteStatus("ERROR: '" & encryptedFilename & "' is NOT ENCRYPTED." & vbLf)
    Return False
End If

Remarks

The current user has read/write access to the new file.

Applies to

CreateFromPackage(String, Stream, PublishLicense, CryptoProvider)

Creates and returns an EncryptedPackageEnvelope that uses the specified unencrypted package as its content, and gives it the specified file name.

public:
 static System::IO::Packaging::EncryptedPackageEnvelope ^ CreateFromPackage(System::String ^ envelopeFileName, System::IO::Stream ^ packageStream, System::Security::RightsManagement::PublishLicense ^ publishLicense, System::Security::RightsManagement::CryptoProvider ^ cryptoProvider);

public static System.IO.Packaging.EncryptedPackageEnvelope CreateFromPackage (string envelopeFileName, System.IO.Stream packageStream, System.Security.RightsManagement.PublishLicense publishLicense, System.Security.RightsManagement.CryptoProvider cryptoProvider);

static member CreateFromPackage : string * System.IO.Stream * System.Security.RightsManagement.PublishLicense * System.Security.RightsManagement.CryptoProvider -> System.IO.Packaging.EncryptedPackageEnvelope

Public Shared Function CreateFromPackage (envelopeFileName As String, packageStream As Stream, publishLicense As PublishLicense, cryptoProvider As CryptoProvider) As EncryptedPackageEnvelope

Parameters

envelopeFileName: String

The name of the OLE compound file.

packageStream: Stream

The stream representing the existing unencrypted package.

publishLicense: PublishLicense

The publish license that is embedded in the compound file.

cryptoProvider: CryptoProvider

An object that determines what operations the current user is allowed to perform on the encrypted content.

Returns

EncryptedPackageEnvelope

The newly created EncryptedPackageEnvelope.

Exceptions

ArgumentNullException

envelopeFileName or packageStream is null.

Examples

The following example shows how to use the CreateFromPackage method to instantiate an EncryptedPackageEnvelope.

WriteStatus("   Signing the UnsignedPublishLicense\n" +
            "       to build the PublishLicense.");
UseLicense authorsUseLicense;
PublishLicense publishLicense =
    unsignedLicense.Sign(_secureEnv, out authorsUseLicense);

WriteStatus("   Binding the author's UseLicense and");
WriteStatus("       obtaining the CryptoProvider.");
CryptoProvider cryptoProvider = authorsUseLicense.Bind(_secureEnv);

WriteStatus("   Creating the EncryptedPackage.");
Stream packageStream = File.OpenRead(packageFile);
EncryptedPackageEnvelope ePackage =
    EncryptedPackageEnvelope.CreateFromPackage(encryptedFile,
        packageStream, publishLicense, cryptoProvider);

WriteStatus("   Adding an author's UseLicense.");
RightsManagementInformation rmi =
    ePackage.RightsManagementInformation;
rmi.SaveUseLicense(author, authorsUseLicense);

ePackage.Close();
WriteStatus("   Done - Package encryption complete.");

WriteStatus("Verifying package encryption.");
if (EncryptedPackageEnvelope.IsEncryptedPackageEnvelope(encryptedFile))
{
    WriteStatus("   Confirmed - '" + encryptedFilename +
                "' is encrypted.");
}
else
{
    MessageBox.Show("ERROR: '" + encryptedFilename +
        "' is NOT ENCRYPTED.", "Encryption Error",
        MessageBoxButton.OK, MessageBoxImage.Error);
    WriteStatus("ERROR: '" + encryptedFilename +
                "' is NOT ENCRYPTED.\n");
    return false;
}

WriteStatus("   Signing the UnsignedPublishLicense" & vbLf & "       to build the PublishLicense.")
Dim authorsUseLicense As UseLicense = Nothing
Dim publishLicense As PublishLicense = unsignedLicense.Sign(_secureEnv, authorsUseLicense)

WriteStatus("   Binding the author's UseLicense and")
WriteStatus("       obtaining the CryptoProvider.")
Dim cryptoProvider As CryptoProvider = authorsUseLicense.Bind(_secureEnv)

WriteStatus("   Creating the EncryptedPackage.")
Dim packageStream As Stream = File.OpenRead(packageFile)
Dim ePackage As EncryptedPackageEnvelope = EncryptedPackageEnvelope.CreateFromPackage(encryptedFile, packageStream, publishLicense, cryptoProvider)

WriteStatus("   Adding an author's UseLicense.")
Dim rmi As RightsManagementInformation = ePackage.RightsManagementInformation
rmi.SaveUseLicense(author, authorsUseLicense)

ePackage.Close()
WriteStatus("   Done - Package encryption complete.")

WriteStatus("Verifying package encryption.")
If EncryptedPackageEnvelope.IsEncryptedPackageEnvelope(encryptedFile) Then
    WriteStatus("   Confirmed - '" & encryptedFilename & "' is encrypted.")
Else
    MessageBox.Show("ERROR: '" & encryptedFilename & "' is NOT ENCRYPTED.", "Encryption Error", MessageBoxButton.OK, MessageBoxImage.Error)
    WriteStatus("ERROR: '" & encryptedFilename & "' is NOT ENCRYPTED." & vbLf)
    Return False
End If

Remarks

If a file with the specified name already exists, it is overwritten.

The current user has read/write access to the file.

Applies to

שתף באמצעות

EncryptedPackageEnvelope.CreateFromPackage Method

Definition

Overloads

Examples

CreateFromPackage(Stream, Stream, PublishLicense, CryptoProvider)

Parameters

Returns

Exceptions

Examples

Remarks

See also

Applies to

CreateFromPackage(String, Stream, PublishLicense, CryptoProvider)

Parameters

Returns

Exceptions

Examples

Remarks

See also

Applies to

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