Merge pull request #691 from AmitM0287/Main_AmitM_Feature_CustomEncry…

…ptionDecryption_21Jan

CustomEncryptionDecryption Project

projects/CustomEncryptionDecryption/.env.example

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+SECRET_KEY = "https://github.com/AmitM0287"
+ENCRYPT_KEY_LEN = 7

projects/CustomEncryptionDecryption/README.md

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+# CustomEncryptionDecryption
+    # Overview
+        CustomEncryptionDecryption is a simple Python program that allows users to encrypt and decrypt their data or text using a SECRET_KEY and CIPHER_TEXT. This program provides a basic and customizable encryption and decryption mechanism for securing sensitive information.
+
+# Prerequisites
+    Before running the program, ensure you have Python installed on your system. Additionally, make sure to have the required dependencies by running:
+
+    # bash
+    # Copy code
+        pip install -r requirements.txt
+
+# Getting Started
+    Clone the Repository:
+
+    # bash
+    # Copy code
+        git clone https://github.com/Mrinank-Bhowmick/python-beginner-projects.git
+        cd projects/CustomEncryptionDecryption
+
+# Create Environment File:
+    Make a copy of the .env.example file and rename it to .env. Edit the .env file to set your desired SECRET_KEY and CIPHER_TEXT values.
+
+# Install Dependencies:
+    Install the required dependencies by running:
+
+    # bash
+    # Copy code
+        pip install -r requirements.txt
+
+# Run the Program:
+    Execute the following command to start the program:
+
+    # bash
+    # Copy code
+        python script.py
+
+# Usage
+    Upon running the program, you will be prompted to choose between encryption and decryption. Enter the necessary details, and the program will perform the requested operation using the provided SECRET_KEY and CIPHER_TEXT.
+
+# Contributing
+    If you'd like to contribute to this project, please follow these steps:
+
+    a. Fork the repository
+    b. Create a new branch for your feature or bug fix
+    c. Make your changes and commit them
+    d. Push your changes to your fork
+    e. Submit a pull request
+
+    Thank you for contributing!
+
+# License
+    This project is licensed under the MIT License.
+
+# Acknowledgements
+    Special thanks to all contributors and users of CustomEncryptionDecryption!
+
+    Thank you for using this program. If you have any issues or questions, feel free to open an issue or contact me.
+
+    Happy encrypting and decrypting! 🚀

projects/CustomEncryptionDecryption/cipher_text.txt

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

projects/CustomEncryptionDecryption/requirements.txt

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+PyJWT==2.8.0
+python-dotenv==1.0.0

projects/CustomEncryptionDecryption/script.py

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+import string
+import random
+import jwt
+import base64
+import os
+from dotenv import load_dotenv
+load_dotenv()
+
+
+class CustomEncrDecr:
+    def __init__(self) -> None:
+        self.__SECRET_KEY = str(os.getenv('SECRET_KEY'))
+        self.__ENDE_KEY_LEN = int(os.getenv('ENDE_KEY_LEN'))
+        self.__keyStore = privateKeyStore(self.__ENDE_KEY_LEN)
+
+    def _encryptText(self, text) -> str:
+        encryptedText = ''
+        for char in text:
+            val = self.__keyStore._getCipherEStore().get(char)
+            encryptedText += char if val is None else val
+        encryptedText = base64.b64encode(encryptedText.encode('utf-8')).decode('utf-8')
+        return encryptedText
+
+    def _decryptText(self, encryptedText) -> str:
+        decryptedText = ''
+        encryptedText = base64.b64decode(encryptedText.encode('utf-8')).decode('utf-8')
+        for idx in range(0, len(encryptedText), self.__ENDE_KEY_LEN):
+            st = encryptedText[idx: idx + self.__ENDE_KEY_LEN]
+            val = self.__keyStore._getCipherDStore().get(st)
+            decryptedText += st if val is None else val
+        return decryptedText
+
+    def _generateCipherText(self) -> str:
+        self.__keyStore._generateCipherEStore()
+        self.__keyStore._generateCipherDStore()
+        dataString = jwt.encode(self.__keyStore._getCipherEStore(), self.__SECRET_KEY, algorithm='HS256')
+        cipherText = base64.b64encode(dataString.encode('utf-8')).decode('utf-8')
+        with open('cipher_text.txt', 'w') as file:
+            file.write(str(cipherText).strip())
+
+    def _verifyCipherText(self, cipherText='') -> None:
+        dataString = base64.b64decode(cipherText.encode('utf-8')).decode('utf-8')
+        cipherEstore = jwt.decode(dataString, self.__SECRET_KEY, algorithms=['HS256'])
+        self.__keyStore._setCipherEStote(cipherEstore)
+        self.__keyStore._generateCipherDStore()
+
+
+class privateKeyStore:
+    def __init__(self, CIPHER_KEY) -> None:
+        self.__CIPHER_ESTORE = {}
+        self.__CIPHER_DSTORE = {}
+        self.__ENDE_KEY_LEN = CIPHER_KEY
+
+    def _getCipherEStore(self) -> dict:
+        return self.__CIPHER_ESTORE
+
+    def _getCipherDStore(self) -> dict:
+        return self.__CIPHER_DSTORE
+
+    def _setCipherEStote(self, cipherEstore) -> None:
+        self.__CIPHER_ESTORE = cipherEstore
+
+    def _generateCipherDStore(self) -> dict:
+        for k, v in self.__CIPHER_ESTORE.items():
+            self.__CIPHER_DSTORE[v] = k
+
+    def _generateCipherEStore(self) -> dict:
+        for char in string.ascii_letters + string.digits + string.punctuation + string.whitespace:
+            self.__CIPHER_ESTORE[char] = self.__generateSecureText()
+
+    def __generateSecureText(self) -> str:
+        return ''.join(random.choices(string.ascii_letters + string.digits + string.hexdigits + string.octdigits, k=self.__ENDE_KEY_LEN))
+
+
+if __name__ == '__main__':
+    print('\nWelcome to Custom Encryption & Decryption Program!')
+    customEncrDecr = CustomEncrDecr()
+    exitFlag = False
+    while(not exitFlag):
+        userOption = input('\n\nDo you already have a CIPHER TEXT ? \n\ta. Press \'c\' to continue with the default CIPHER TEXT \n\tb. Press \'y\' if you already have a CIPHER TEXT \n\tc. Press \'g\' to generate a CIPHER TEXT  \n\td. Press \'r\' to report a BUG \n\nYou have chosen: ')
+        match userOption:
+            case 'y':
+                print('\nPlease add the CIPHER TEXT into the \'cipher_text.txt\' file! then start the program!\n')
+                exit()
+            case 'g':
+                customEncrDecr._generateCipherText()
+                print('\nYour CIPHER TEXT has been generated successfully! and added into the \'cipher_text.txt\' file!')
+                exitFlag = True
+            case 'c':
+                try:
+                    with open('cipher_text.txt', 'r') as file:
+                        cipherText = str(file.read()).strip()
+                        customEncrDecr._verifyCipherText(cipherText)
+                        exitFlag = True
+                except Exception as exc:
+                    print("\n\n", exc)
+                    exitFlag = False
+                    print('\nCIPHER TEXT is INVALID! Make sure you have added a valid CIPHER TEXT inside the \'cipher_text.txt\' file!')
+            case 'r':
+                print('\nPlease send me a detail email at \'[email protected]\'. Keep the subject as \'BUG: Custom Encryption & Decryption Program\'. \n\nTo follow me use below social accounts: \n\ta. LinkedIn: https://www.linkedin.com/in/amitm0287/ \n\tb. GitHub: https://github.com/AmitM0287 \n\nThank you for time! Have a good day :)\n')
+                exit()
+            case _:
+                print('\nPlease choose a valid option next time!')
+    exitFlag = False
+    while(not exitFlag):
+        userOption = input('\n\nPlease choose one option from below: \n\ta. Press \'e\' to ENCRYPT a TEXT \n\tb. Press \'d\' to DECRYPT a ENCRYPTED TEXT \n\tc. Press \'q\' to QUIT the program ? \n\nYou have chosen: ')
+        match userOption:
+            case 'e':
+                text = input('\nPlease enter your text : ')
+                print('\nYour ENCRYPTED TEXT text is: ', customEncrDecr._encryptText(text), '\n')
+            case 'd':
+                try:
+                    _encryptedText = input('\nPlease enter your ENCRYPTED TEXT : ')
+                    print('\nYour DECRYPTED TEXT is: ', customEncrDecr._decryptText(_encryptedText))
+                except Exception as exc:
+                    print('\nENCRYPTED TEXT is INVALID! Make sure you are using the same CIPHER TEXT which you used at the time of ENCRYPTION!')
+            case 'q':
+                print('\nThanks for using custom encryption & decryption program! Have great day :)\n')
+                exit()
+            case _:
+                print('\nPlease choose a valid option next time!')
+        exitFlag = False if input('\nDo you want to continue to the program ? \n\ta. Press \'c\' to continue! \n\tb. Press \'any other key\' to quit the program!  \n\nYou have chosen: ') == 'c' else True