Decrypt password-protected PDF in Python.

decrypt_pdf.py

# Decrypt password-protected PDF in Python.
# cleaned-up version of http://stackoverflow.com/a/26537710/329263
# 
# Requirements:
# pip install PyPDF2
#
# Usage: decrypt_pdf('encrypted.pdf', 'decrypted.pdf', 'secret_password')
from argparse import ArgumentParser
from PyPDF2 import PdfFileReader, PdfFileWriter


def decrypt_pdf(input_path, output_file, password):
    with open(input_path, "rb") as input_file, open(output_file, 'wb') as output_file:
        reader = PdfFileReader(input_file)
        reader.decrypt(password)

        writer = PdfFileWriter()

        for i in range(reader.getNumPages()):
            writer.addPage(reader.getPage(i))

        writer.write(output_file)


def getopt():
    parser = ArgumentParser()
    parser.add_argument("-i", "--input", dest="file_path", help="file path to decrypt")
    parser.add_argument("-p", "--password", dest="password", help="password of file")
    parser.add_argument("-o", "--output", dest="out_path", help="path to write decrypted file")
    return parser.parse_args()


def main(options):
    decrypt_pdf(options.file_path, options.out_path, options.password)


if __name__ == "__main__":
    main(getopt())