add pdf locker tutorial

Author: x4nth055

README.md

@@ -49,6 +49,7 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy
     - [How to Create a Zip File Locker in Python](https://thepythoncode.com/article/build-a-zip-file-locker-in-python). ([code](ethical-hacking/zip-file-locker))
     - [How to Implement the Caesar Cipher in Python](https://thepythoncode.com/article/implement-caesar-cipher-in-python). ([code](ethical-hacking/caesar-cipher))
     - [How to Crack the Caesar Cipher in Python](https://thepythoncode.com/article/how-to-crack-caesar-cipher-in-python). ([code](ethical-hacking/caesar-cipher))
+    - [How to Lock PDFs in Python](https://thepythoncode.com/article/lock-pdfs-in-python). [(code)](ethical-hacking/pdf-locker)
 
 - ### [Machine Learning](https://www.thepythoncode.com/topic/machine-learning)
     - ### [Natural Language Processing](https://www.thepythoncode.com/topic/nlp)

ethical-hacking/pdf-locker/README.md

@@ -0,0 +1 @@
+# [How to Lock PDFs in Python](https://thepythoncode.com/article/lock-pdfs-in-python)

ethical-hacking/pdf-locker/pdf_locker.py

@@ -0,0 +1,39 @@
+# Import the necessary libraries
+import PyPDF2, getpass # getpass is for getting password with some level of security
+from colorama import Fore, init
+
+# Initialize colorama for colored output
+init()
+
+
+# Function to lock pdf
+def lock_pdf(input_file, password):
+    with open(input_file, 'rb') as file:
+        # Create a PDF reader object
+        pdf_reader = PyPDF2.PdfReader(file)
+
+        # Create a PDF writer object
+        pdf_writer = PyPDF2.PdfWriter()
+
+        # Add all pages to the writer
+        for page_num in range(len(pdf_reader.pages)):
+            pdf_writer.add_page(pdf_reader.pages[page_num])
+
+        # Encrypt the PDF with the provided password
+        pdf_writer.encrypt(password)
+
+        # Write the encrypted content back to the original file
+        with open(input_file, 'wb') as output_file:
+            pdf_writer.write(output_file)
+
+
+# Get user input
+input_pdf = input("Enter the path to the PDF file: ")
+password = getpass.getpass("Enter the password to lock the PDF: ")
+
+# Lock the PDF using PyPDF2
+print(f'{Fore.GREEN}[!] Please hold on for a few seconds..')
+lock_pdf(input_pdf, password)
+
+# Let the user know it's done
+print(f"{Fore.GREEN}[+] PDF locked successfully.")

ethical-hacking/pdf-locker/requirements.txt

@@ -0,0 +1,2 @@
+PyPDF2
+colorama