Verify Signature in PDF in Python SDK
Verify a Signature in PDF Document using Cloud Python SDK.
Get StartedHow to verify Signature in PDF via Cloud Python SDK
To verify signature in PDF, we’ll use Aspose.PDF Cloud Python SDK. This Cloud SDK assists Python programmers in developing cloud-based PDF creator, annotator, editor, and converter apps using Python programming language via Aspose.PDF REST API. Simply create an account at Aspose for Cloud and get your application information. Once you have the App SID & key, you are ready to give the Aspose.PDF Cloud Python SDK. If the python package is hosted on Github, you can install directly from Github:
Installation from Github
pip install git+https://github.com/aspose-pdf-cloud/aspose-pdf-cloud-python.git
Package Manager Console Command
pip install asposepdfcloud
Steps to verify signature in PDF via Python SDK
Aspose.PDF Cloud developers can easily load & verify signature in PDF in just a few lines of code.
- Install Python SDK.
- Uploads PDF documents to the cloud, and is set up to download processed documents.
- Append a new signature to the PDF document.
Verify Signature in PDF using Python
import shutil
import json
import logging
from pathlib import Path
from asposepdfcloud import ApiClient, PdfApi, Signature, SignatureType, Rectangle
# Configure logging
logging.basicConfig(level=logging.INFO, format="%(asctime)s - %(levelname)s - %(message)s")
class Config:
"""Configuration parameters."""
CREDENTIALS_FILE = Path(r".../../../credentials.json")
LOCAL_FOLDER = Path(r"C:\Samples")
PDF_DOCUMENT_NAME = "sample-signed.pdf"
SIGNATURE_FORM_FIELD = 'sign1'
class PdfSignatures:
"""Class for managing PDF signatures using Aspose PDF Cloud API."""
def __init__(self, credentials_file: Path = Config.CREDENTIALS_FILE):
self.pdf_api = None
self._init_api(credentials_file)
def _init_api(self, credentials_file: Path):
"""Initialize the API client."""
try:
with credentials_file.open("r", encoding="utf-8") as file:
credentials = json.load(file)
api_key, app_id = credentials.get("key"), credentials.get("id")
if not api_key or not app_id:
raise ValueError("init_api(): Error: Missing API keys in the credentials file.")
self.pdf_api = PdfApi(ApiClient(api_key, app_id))
except (FileNotFoundError, json.JSONDecodeError, ValueError) as e:
logging.error(f"init_api(): Failed to load credentials: {e}")
def upload_document(self):
"""Upload a PDF document to the Aspose Cloud server."""
if self.pdf_api:
file_path = Config.LOCAL_FOLDER / Config.PDF_DOCUMENT_NAME
try:
self.pdf_api.upload_file(Config.PDF_DOCUMENT_NAME, str(file_path))
logging.info(f"File {Config.PDF_DOCUMENT_NAME} uploaded successfully.")
except Exception as e:
logging.error(f"Failed to upload file: {e}")
def verify_signature(self):
"""Verify signature fields in the PDF document."""
if self.pdf_api:
try:
response = self.pdf_api.get_verify_signature(Config.PDF_DOCUMENT_NAME, Config.SIGNATURE_FORM_FIELD)
if response.code == 200:
if response.valid == True:
logging.info(f"verify_signature(): Signature is VALID for the '{Config.PDF_DOCUMENT_NAME}' documen.")
else:
logging.error(f"verify_signature(): Signature is NOT VALID for the '{Config.PDF_DOCUMENT_NAME}' documen.")
else:
logging.error(f"verify_signature(): Failed to verify signature for the document. Response code: {response.code}")
except Exception as e:
logging.error(f"verify_signature(): Error while verified signature: {e}")
if __name__ == "__main__":
pdf_sign = PdfSignatures()
pdf_sign.upload_document()
pdf_sign.verify_signature()
Work with Signature in PDF
Verifying a signature in a PDF is essential to ensure the document’s authenticity and integrity. It confirms that the content has not been altered since it was signed and that the signature was made by a trusted source. Signature verification is crucial in legal, financial, and business contexts where the validity of digital documents must be confirmed to prevent fraud and ensure compliance with regulations. Verify Signature in PDF documents with Aspose.PDF Cloud Python SDK.
With our Python library you can:
- Combine PDF documents.
- Split PDF Files.
- Convert PDF to other formats, and vice versa.
- Manipulate Annotations.
- Work with Images in PDF, etc.
- You can try out our free App to test the functionality online.