Aspose::Words::DigitalSignatures::DigitalSignatureUtil::LoadSignatures method

DigitalSignatureUtil::LoadSignatures(const System::SharedPtr<System::IO::Stream>&) method

Loads digital signatures from document using stream.

static System::SharedPtr<Aspose::Words::DigitalSignatures::DigitalSignatureCollection> Aspose::Words::DigitalSignatures::DigitalSignatureUtil::LoadSignatures(const System::SharedPtr<System::IO::Stream> &stream)
ParameterTypeDescription
streamconst System::SharedPtr<System::IO::Stream>&Stream with the document.

ReturnValue

Collection of digital signatures. Returns empty collection if file is not signed.

Examples

Shows how to load signatures from a digitally signed document.

// There are two ways of loading a signed document's collection of digital signatures using the DigitalSignatureUtil class.
// 1 -  Load from a document from a local file system filename:
SharedPtr<DigitalSignatureCollection> digitalSignatures = DigitalSignatureUtil::LoadSignatures(MyDir + u"Digitally signed.docx");

// If this collection is nonempty, then we can verify that the document is digitally signed.
ASSERT_EQ(1, digitalSignatures->get_Count());

// 2 -  Load from a document from a FileStream:
{
    SharedPtr<System::IO::Stream> stream = MakeObject<System::IO::FileStream>(MyDir + u"Digitally signed.docx", System::IO::FileMode::Open);
    digitalSignatures = DigitalSignatureUtil::LoadSignatures(stream);
    ASSERT_EQ(1, digitalSignatures->get_Count());
}

See Also

DigitalSignatureUtil::LoadSignatures(const System::String&) method

Loads digital signatures from document.

static System::SharedPtr<Aspose::Words::DigitalSignatures::DigitalSignatureCollection> Aspose::Words::DigitalSignatures::DigitalSignatureUtil::LoadSignatures(const System::String &fileName)
ParameterTypeDescription
fileNameconst System::String&Path to the document.

ReturnValue

Collection of digital signatures. Returns empty collection if file is not signed.

Examples

Shows how to load signatures from a digitally signed document.

// There are two ways of loading a signed document's collection of digital signatures using the DigitalSignatureUtil class.
// 1 -  Load from a document from a local file system filename:
SharedPtr<DigitalSignatureCollection> digitalSignatures = DigitalSignatureUtil::LoadSignatures(MyDir + u"Digitally signed.docx");

// If this collection is nonempty, then we can verify that the document is digitally signed.
ASSERT_EQ(1, digitalSignatures->get_Count());

// 2 -  Load from a document from a FileStream:
{
    SharedPtr<System::IO::Stream> stream = MakeObject<System::IO::FileStream>(MyDir + u"Digitally signed.docx", System::IO::FileMode::Open);
    digitalSignatures = DigitalSignatureUtil::LoadSignatures(stream);
    ASSERT_EQ(1, digitalSignatures->get_Count());
}

Shows how to remove digital signatures from a digitally signed document.

// There are two ways of using the DigitalSignatureUtil class to remove digital signatures
// from a signed document by saving an unsigned copy of it somewhere else in the local file system.
// 1 - Determine the locations of both the signed document and the unsigned copy by filename strings:
DigitalSignatureUtil::RemoveAllSignatures(MyDir + u"Digitally signed.docx", ArtifactsDir + u"DigitalSignatureUtil.LoadAndRemove.FromString.docx");

// 2 - Determine the locations of both the signed document and the unsigned copy by file streams:
{
    SharedPtr<System::IO::Stream> streamIn = MakeObject<System::IO::FileStream>(MyDir + u"Digitally signed.docx", System::IO::FileMode::Open);
    {
        SharedPtr<System::IO::Stream> streamOut =
            MakeObject<System::IO::FileStream>(ArtifactsDir + u"DigitalSignatureUtil.LoadAndRemove.FromStream.docx", System::IO::FileMode::Create);
        DigitalSignatureUtil::RemoveAllSignatures(streamIn, streamOut);
    }
}

// Verify that both our output documents have no digital signatures.
ASSERT_EQ(0, DigitalSignatureUtil::LoadSignatures(ArtifactsDir + u"DigitalSignatureUtil.LoadAndRemove.FromString.docx")->get_Count());
ASSERT_EQ(0, DigitalSignatureUtil::LoadSignatures(ArtifactsDir + u"DigitalSignatureUtil.LoadAndRemove.FromStream.docx")->get_Count());

See Also

DigitalSignatureUtil::LoadSignatures(std::basic_istream<CharType, Traits>&) method

template<typename CharType,typename Traits> static System::SharedPtr<Aspose::Words::DigitalSignatures::DigitalSignatureCollection> Aspose::Words::DigitalSignatures::DigitalSignatureUtil::LoadSignatures(std::basic_istream<CharType, Traits> &stream)

See Also

Aspose::Words::DigitalSignatures::DigitalSignatureUtil::RemoveAllSignatures method