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GroupDocs.Signature supports verification of documents for different signature types. This approach requires to add all required verification options to list.
Here are the steps to verify document for multiple signatures with GroupDocs.Signature:
- Create new instance of Signature class and pass source document path or stream as a constructor parameter.
- Instantiate required several VerifyOptions objects (BarcodeVerifyOptions, QrCodeVerifyOptions, DigitalVerifyOptions, TextVerifyOptions) and add instances to list of VerifyOptions.
- Call verify method of Signature class instance and pass filled list of VerifyOptions to it. The
is_validproperty of the returned VerificationResult isTrueonly when every options object in the list matches a valid signature;succeededlists the signatures that passed.
This example shows how to verify the document for different signature types.
from groupdocs.signature import Signature
from groupdocs.signature.domain import TextMatchType, TextSignatureImplementation
from groupdocs.signature.options import (BarcodeVerifyOptions, DigitalVerifyOptions, QrCodeVerifyOptions,
TextVerifyOptions)
def verify_multiple_signature_types():
with Signature("signed.pdf") as signature:
# Text signature that contains "John"
text_options = TextVerifyOptions()
text_options.all_pages = True # this value is set by default
text_options.signature_implementation = TextSignatureImplementation.NATIVE
text_options.text = "John"
text_options.match_type = TextMatchType.CONTAINS
# Barcode signature that contains "12345"
barcode_options = BarcodeVerifyOptions()
barcode_options.text = "12345"
barcode_options.match_type = TextMatchType.CONTAINS
# QR code signature that contains "John"
qr_code_options = QrCodeVerifyOptions()
qr_code_options.text = "John"
qr_code_options.match_type = TextMatchType.CONTAINS
# Digital signature made with this certificate for the reason "Approved"
digital_options = DigitalVerifyOptions("certificate.pfx")
digital_options.password = "1234567890"
digital_options.reason = "Approved"
result = signature.verify([text_options, barcode_options, qr_code_options, digital_options])
if result.is_valid:
print("Document was verified successfully!")
else:
print("Document failed verification process.")
for verified in result.succeeded:
print(f"Verified {verified.signature_type.name} signature")
if __name__ == "__main__":
verify_multiple_signature_types()
signed.pdf is the sample file used in this example. Click here to download it.
certificate.pfx is the sample file used in this example. Click here to download it.
Document was verified successfully!
Verified TEXT signature
Verified BARCODE signature
Verified QR_CODE signature
Verified DIGITAL signature
You may easily run the code above and see the feature in action in our GitHub examples:
Along with the full-featured Python library, we provide simple but powerful free online apps.
To sign PDF, Word, Excel, PowerPoint, and other documents you can use the online apps from the GroupDocs.Signature App Product Family.
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