added encryption and decryption file scrip in secure folder

backend/scripts/security/file_encrypt_decrypt.py

@@ -0,0 +1,97 @@
+import tkinter as tk
+from tkinter import filedialog
+import re
+import getpass
+from cryptography.fernet import Fernet
+import base64
+import hashlib
+import os
+
+
+def select_file():
+    root = tk.Tk()
+    root.withdraw()
+    file_path = filedialog.askopenfilename(
+        title="Select file to encrypt/decrypt"
+    )
+    return file_path
+
+
+def get_password_type():
+    print("Choose password type:")
+    print("1. Alphabetic")
+    print("2. Numeric")
+    print("3. Alphanumeric")
+    while True:
+        option = input("Enter option (1/2/3): ").strip()
+        if option in ["1", "2", "3"]:
+            return option
+        print("Invalid option. Try again.")
+
+
+def get_password(option):
+    while True:
+        pwd = getpass.getpass("Enter password: ")
+        if option == "1" and re.fullmatch(r"[A-Za-z]+", pwd):
+            return pwd
+        elif option == "2" and re.fullmatch(r"\d+", pwd):
+            return pwd
+        elif option == "3" and re.fullmatch(r"[A-Za-z0-9]+", pwd):
+            return pwd
+        print("Invalid password format. Try again.")
+
+
+def derive_key(password):
+    key = hashlib.sha256(password.encode()).digest()
+    return base64.urlsafe_b64encode(key)
+
+
+def encrypt_file(file_path, key):
+    with open(file_path, "rb") as f:
+        data = f.read()
+    fernet = Fernet(key)
+    encrypted = fernet.encrypt(data)
+    out_path = file_path + ".enc"
+    with open(out_path, "wb") as f:
+        f.write(encrypted)
+    print(f"File encrypted: {out_path}")
+
+
+def decrypt_file(file_path, key):
+    with open(file_path, "rb") as f:
+        data = f.read()
+    fernet = Fernet(key)
+    try:
+        decrypted = fernet.decrypt(data)
+    except Exception:
+        print("Decryption failed. Wrong password or corrupted file.")
+        return
+    out_path = file_path.replace(".enc", ".dec")
+    with open(out_path, "wb") as f:
+        f.write(decrypted)
+    print(f"File decrypted: {out_path}")
+
+
+def main():
+    print("Choose action:")
+    print("1. Encrypt")
+    print("2. Decrypt")
+    action = input("Enter option (1/2): ").strip()
+    if action not in ["1", "2"]:
+        print("Invalid action.")
+        return
+    file_path = select_file()
+    if not file_path:
+        print("No file selected.")
+        return
+    pwd_type = get_password_type()
+    password = get_password(pwd_type)
+    key = derive_key(password)
+    if action == "1":
+        encrypt_file(file_path, key)
+    else:
+        decrypt_file(file_path, key)
+
+
+if __name__ == "__main__":
+    main()

ui/package.json

@@ -9,19 +9,19 @@
     "lint": "next lint"
   },
   "dependencies": {
+    "next": "^15.5.2",
     "react": "19.1.0",
-    "react-dom": "19.1.0",
-    "next": "15.4.5"
+    "react-dom": "19.1.0"
   },
   "devDependencies": {
-    "typescript": "^5",
+    "@eslint/eslintrc": "^3",
+    "@tailwindcss/postcss": "^4",
     "@types/node": "^20",
     "@types/react": "^19",
     "@types/react-dom": "^19",
-    "@tailwindcss/postcss": "^4",
-    "tailwindcss": "^4",
     "eslint": "^9",
     "eslint-config-next": "15.4.5",
-    "@eslint/eslintrc": "^3"
+    "tailwindcss": "^4",
+    "typescript": "^5"
   }
 }