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sajaniemi_variable_dataset_large / pool /shard009 /Python /0080377_P2_decryptPDFparanoia.py

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"""Decrypt PDF paranoia
Write a program that finds all encrypted PDFs in a folder (and its subfolders)
and creates a decrypted copy of the PDF using a provided password. If the
password is incorrect, the program should print a message to the user and
continue to the next PDF.
Note:
    * Default input folder is parent directory.
    * Default output suffix is '_decrypted.pdf'.
"""


def main():
    import PyPDF4, os
    from PyPDF4.utils import PdfReadError

    FOLDER = "../"
    SUFFIX = "_encrypted.pdf"

    # Get all encrypted PDFs in FOLDER
    files = []
    for folderName, subfolders, filenames in os.walk(FOLDER):
        for filename in filenames:
            # If file is in subdirectory, append backslash to folderName
            if folderName.endswith('/'):
                filepath = folderName + filename
            else:
                filepath = folderName + '/' + filename

            if filename.lower().endswith(".pdf") and PyPDF4.PdfFileReader(open(filepath, "rb")).isEncrypted:
                files.append(filepath)

    # Get password from user
    password = input("Please input decryption password:\n")

    # Decrypt all PDFs with password
    for file in files:
        pdfReader = PyPDF4.PdfFileReader(open(file, "rb"))
        pdfReader.decrypt(password)
        # If incorrect password, print message and continue to next PDF
        try:
            pdfReader.getPage(0)
        except PdfReadError as err:
            print("PdfReadError: %s" % err)
            print("Skipping: %s" % file)
            continue
        else:
            # Read decrypted PDF
            pdfWriter = PyPDF4.PdfFileWriter()
            for pageNum in range(pdfReader.numPages):
                pdfWriter.addPage(pdfReader.getPage(pageNum))
            # Save decrypted PDF by removing SUFFIX, if present
            if file.lower().endswith(SUFFIX):
                newfile = file[:-len(SUFFIX)] + ".pdf"
            else:
                newfile = file
            if os.path.exists(newfile):
                newfile = newfile[:-4] + "_decrypted.pdf"
            resultPdf = open(newfile, "wb")
            pdfWriter.write(resultPdf)
            resultPdf.close()


if __name__ == '__main__':
    main()

	"""Decrypt PDF paranoia

	Write a program that finds all encrypted PDFs in a folder (and its subfolders)
	and creates a decrypted copy of the PDF using a provided password. If the
	password is incorrect, the program should print a message to the user and
	continue to the next PDF.

	Note:
	* Default input folder is parent directory.
	* Default output suffix is '_decrypted.pdf'.

	"""


	def main():
	import PyPDF4, os
	from PyPDF4.utils import PdfReadError

	FOLDER = "../"
	SUFFIX = "_encrypted.pdf"

	# Get all encrypted PDFs in FOLDER
	files = []
	for folderName, subfolders, filenames in os.walk(FOLDER):
	for filename in filenames:
	# If file is in subdirectory, append backslash to folderName
	if folderName.endswith('/'):
	filepath = folderName + filename
	else:
	filepath = folderName + '/' + filename

	if filename.lower().endswith(".pdf") and PyPDF4.PdfFileReader(open(filepath, "rb")).isEncrypted:
	files.append(filepath)

	# Get password from user
	password = input("Please input decryption password:\n")

	# Decrypt all PDFs with password
	for file in files:
	pdfReader = PyPDF4.PdfFileReader(open(file, "rb"))
	pdfReader.decrypt(password)
	# If incorrect password, print message and continue to next PDF
	try:
	pdfReader.getPage(0)
	except PdfReadError as err:
	print("PdfReadError: %s" % err)
	print("Skipping: %s" % file)
	continue
	else:
	# Read decrypted PDF
	pdfWriter = PyPDF4.PdfFileWriter()
	for pageNum in range(pdfReader.numPages):
	pdfWriter.addPage(pdfReader.getPage(pageNum))
	# Save decrypted PDF by removing SUFFIX, if present
	if file.lower().endswith(SUFFIX):
	newfile = file[:-len(SUFFIX)] + ".pdf"
	else:
	newfile = file
	if os.path.exists(newfile):
	newfile = newfile[:-4] + "_decrypted.pdf"
	resultPdf = open(newfile, "wb")
	pdfWriter.write(resultPdf)
	resultPdf.close()


	if __name__ == '__main__':
	main()