How to verify if signature field is filled with any signature or not using python?

Technical Support
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1

Hi,

I am using python for my project and I am actively looking for a solution to validate if the annotated field is already signed or not?

kindly help me to find this

2

Yes definitely.

To check if the signature is crypto graphically signed you can call this API
https://www.pdftron.com/api/PDFTronSDK/cpp/classpdftron_1_1_p_d_f_1_1_digital_signature_field.html#a71ea894721c606d187c6047d5e868975

You can also, with or without the call above, check if the field is visually signed.
https://www.pdftron.com/api/PDFTronSDK/cpp/classpdftron_1_1_p_d_f_1_1_digital_signature_field.html#a387a023ad271817cb70cbe5000cbe206

See this sample code for usage.

3

Hi, Thanks for responding.

I am currently using a different process to capture the text fields like the below code.

doc = PDFDoc()
field = doc.GetField("first_name_annotated_field")

type = field.GetType()

if type == Field.e_text:
    logger.info("Text")
    if field.GetValue():
        print("Field Value: ")
        print(field.GetValueAsString())
    field_type = "Text"
    field_value = field.GetValueAsString()

In the above process, I am able to capture what was there in the pdf in field_value. just like that I also can identify if the field is a signature field or not in the below code?

if type == Field.e_signature:
        print("Signiture")
        field_type = "Signiture"

Can you help me if I can find out if the signature is already there wrt to the annotated field using above code?