certificate_holder property

DigitalSignature.certificate_holder property

Returns the certificate holder object that contains the certificate was used to sign the document.

@property
def certificate_holder(self) -> aspose.words.digitalsignatures.CertificateHolder:
    ...

Examples

Shows how to sign documents with X.509 certificates.

# Verify that a document is not signed.
self.assertFalse(aw.FileFormatUtil.detect_file_format(MY_DIR + 'Document.docx').has_digital_signature)
# Create a CertificateHolder object from a PKCS12 file, which we will use to sign the document.
certificate_holder = aw.digitalsignatures.CertificateHolder.create(MY_DIR + 'morzal.pfx', 'aw', None)
# There are two ways of saving a signed copy of a document to the local file system:
# 1 - Designate a document by a local system filename and save a signed copy at a location specified by another filename.
sign_options = aw.digitalsignatures.SignOptions()
sign_options.sign_time = datetime.utcnow()
aw.digitalsignatures.DigitalSignatureUtil.sign(MY_DIR + 'Document.docx', ARTIFACTS_DIR + 'Document.digital_signature.docx', certificate_holder, sign_options)
self.assertTrue(aw.FileFormatUtil.detect_file_format(ARTIFACTS_DIR + 'Document.digital_signature.docx').has_digital_signature)
# 2 - Take a document from a stream and save a signed copy to another stream.
with open(MY_DIR + 'Document.docx', 'rb') as in_doc:
    with open(ARTIFACTS_DIR + 'Document.digital_signature.docx', 'wb') as out_doc:
        aw.digitalsignatures.DigitalSignatureUtil.sign(in_doc, out_doc, certificate_holder)
self.assertTrue(aw.FileFormatUtil.detect_file_format(ARTIFACTS_DIR + 'Document.digital_signature.docx').has_digital_signature)
# Please verify that all of the document's digital signatures are valid and check their details.
signed_doc = aw.Document(ARTIFACTS_DIR + 'Document.digital_signature.docx')
digital_signature_collection = signed_doc.digital_signatures
self.assertTrue(digital_signature_collection.is_valid)
self.assertEqual(1, digital_signature_collection.count)
self.assertEqual(aw.digitalsignatures.DigitalSignatureType.XML_DSIG, digital_signature_collection[0].signature_type)
self.assertEqual('CN=Morzal.Me', signed_doc.digital_signatures[0].issuer_name)
self.assertEqual('CN=Morzal.Me', signed_doc.digital_signatures[0].subject_name)

See Also

DigitalSignature.comments property