From 51c664311bbdec07acc9abf80dd8683a8afd0369 Mon Sep 17 00:00:00 2001
From: Partha Sarathi Dey <parthasdeyofficial@gmail.com>
Date: Tue, 24 Oct 2023 15:27:02 +0530
Subject: [PATCH] added the code for pdf password decrypter

---
 PDF_Password_Decrypter/README.md | 74 ++++++++++++++++++++++++++++
 PDF_Password_Decrypter/main.py   | 82 ++++++++++++++++++++++++++++++++
 2 files changed, 156 insertions(+)
 create mode 100644 PDF_Password_Decrypter/README.md
 create mode 100644 PDF_Password_Decrypter/main.py

diff --git a/PDF_Password_Decrypter/README.md b/PDF_Password_Decrypter/README.md
new file mode 100644
index 0000000..01a5049
--- /dev/null
+++ b/PDF_Password_Decrypter/README.md
@@ -0,0 +1,74 @@
+# Decrypt Your Password Protected pdf files Here
+**Pdf-Password-Decrypter is a Python application that can be used to decrypt PDF files that are password-protected. This is optimised for Linux with apt**
+
+# Features
++ Allows users to select a password-protected PDF file to be decrypted.
++ Provides an entry widget for the user to enter the password for the PDF file.
++ Allows users to enter a new name for the decrypted PDF file.
++ Creates a new PDF file that is not password-protected.
++ Allows users to view the decrypted PDF file in the Evince PDF viewer.
+
+# Upcoming featuers
+Some of the upcoming features include:
++ Editing the pdf directly.
++ Lock the pdf with a new password.
++ Unlocking encrypted pdf files with Brute Force attack.
++ Better UI design.
++ Replace tkinter with Kivy module of python.
++ Switch from PyPDF2 to some other python modules as it is no longer maintained.
+
+# Pre-requisites
+To run this Python program you would need these following packages
++ Python(version 3.7 or higher)
++ Tkinter python package
++ PyPDF2 python package(no longer maintained)
++ Evince pdf viewer
++ GIT
+
+# Installation
+You need to install all the prerequisites, follow the commands:
++ Installing python:
+```
+sudo apt install python3 -y
+```
+
++ Installing Tkinter python package:
+```
+sudo apt install python3-tk -y
+```
+
++ Installing PyPDF2 python package:
+```
+pip install pypdf2
+```
+
++ Installing Evince pdf viewer:
+```
+sudo apt install evince -y
+```
+
++ Installing Git:
+```
+sudo apt install git -y
+```
+
+# Usage
++ You need to first close this repository:
+```
+git clone https://github.com/parthasdey2304/Awesome-Python-Scripts.git
+```
+
++ Getting inside the repository:
+```
+cd Awesome-Python-Scripts/PDF_Password_Decrypter
+```
+
++ Running the python file:
+```
+python3 main.py
+```
+
++ Done
+
+
+# THANK YOU COMMUNITY!!!!
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diff --git a/PDF_Password_Decrypter/main.py b/PDF_Password_Decrypter/main.py
new file mode 100644
index 0000000..7a36c16
--- /dev/null
+++ b/PDF_Password_Decrypter/main.py
@@ -0,0 +1,82 @@
+import os
+import PyPDF2
+from tkinter import *
+from tkinter import filedialog
+
+# Create a GUI window using tkinter
+root = Tk()
+root.configure(background='grey')
+root.title('PDF Password Remover')
+root.geometry('300x350')
+
+# this is the method select_file which when invoked uses filedialog to open a file and store the path of the file in the variable file_path
+def select_file():
+    global file_path
+    file_path = filedialog.askopenfilename()
+
+    # Creating a label to show the file path
+    Label(root, text=file_path, bg='grey', fg='white').pack(pady=10)
+
+# this is the method decrypt which when invoked decrypts the file using the password provided by the user
+def decrypt():
+    passwd = password.get() # getting the password from the entry widget
+
+    # Opening the PDF file with a password
+    pdf_file = open(file_path, 'rb')
+    pdf_reader = PyPDF2.PdfReader(pdf_file)
+    if pdf_reader.is_encrypted:
+        pdf_reader.decrypt(passwd)
+
+    # Create a new PDF file without password protection
+    pdf_writer = PyPDF2.PdfWriter()
+    length = len(pdf_reader.pages)
+    for page_num in range(length):
+        pdf_writer.add_page(pdf_reader.pages[length - page_num - 1])
+
+    # Creating a new file with the name provided by the user
+    new_file_name = new_file.get()+".pdf"
+    new_pdf_file = open(new_file_name, 'wb')
+    pdf_writer.write(new_pdf_file)
+
+    # Closing the files
+    pdf_file.close()
+    new_pdf_file.close()
+
+    # Showing the file in a tkinter window
+    show_pdf()
+
+# this is a method that has a canvas of 500x700 resizeable to show the pdf file
+# def show_pdf():
+#     pdf_file = open(new_file.get()+".pdf", 'rb')
+#     pdf_reader = PyPDF2.PdfReader(pdf_file)
+#     page = pdf_reader.pages[0] 
+#     page_content = page.extract_text()
+#     print(page_content)
+#     pdf_file.close()
+
+def show_pdf():
+    pdf_file = new_file.get()+".pdf"
+    os.system(f"evince {pdf_file}")
+
+
+# Button to choose the file to be decrypted
+Button(root, text='Select File', bg='white', font=('arial', 12, 'normal'), command=select_file).pack(pady=20)
+
+# Label widget to show the password
+Label(root, text='Password: ', bg='grey', fg = 'white', font=('arial', 12, 'normal')).pack()
+
+# Entry widget to accept the password
+password = Entry(root,text='Password', width=20, font=('arial', 12, 'normal'), show='*', border=2)
+password.pack(pady=20)
+
+# Label widget to show the name with which the new file would be stored
+Label(root, text='New File Name:', bg='grey', fg = 'white', font=('arial', 12, 'normal')).pack()
+
+# Entry widget to accept the name with which the new file would be stored
+new_file = Entry(root,text='New File Name', width=20, font=('arial', 12, 'normal'), border=2)
+new_file.pack(pady=20)
+
+# Button to decrypt the file
+Button(root, text='Decrypt', bg='white', font=('arial', 12, 'normal'), command=decrypt).pack(pady=20)
+
+root.mainloop()
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