First working version (encryption only)

.gitignore

@@ -1,8 +1,6 @@
 # Custom
 
-*.dat
-*.asc
-*.asc.s
+*.db
 
 # ---> Python
 # Byte-compiled / optimized / DLL files

files/dependencies.txt

@@ -0,0 +1,4 @@
+pysqlcipher3
+password_strength
+hashlib
+pyotp

keyvault.py

@@ -1,84 +1,71 @@
+try:
     import base64
     import pickle
+    from pysqlcipher3 import dbapi2 as sc
     from math import log2
     from password_strength import PasswordStats
     from getpass import getpass as gp
     from secrets import token_urlsafe
     from random import randint as rint, SystemRandom as sr
     from atexit import register
-from gc import collect
     from os import urandom, path, remove
-from cryptography.fernet import Fernet, InvalidSignature, InvalidToken
-from cryptography.hazmat.primitives import hashes
-from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
-
-def encrypt_db(password):
-    binpass = password.encode()
-    salt = urandom(16)
-    kdf = PBKDF2HMAC(
-        algorithm=hashes.SHA512(),
-        length=32,
-        salt=salt,
-        iterations=1500000,
-    )
-    key = base64.urlsafe_b64encode(kdf.derive(binpass))
-    fernet = Fernet(key)
-
-    with open("database/db.dat", "rb") as f:
-        data = f.read()
-
-    encr = fernet.encrypt(data)
-
-    with open("database/db.asc", "wb") as f:
-        f.write(encr)
-
-    with open("database/db.s", "wb") as f:
-        f.write(salt)
-
-def decrypt_db(password):
-    with open("database/db.s", "rb") as f:
-        salt = f.read()
-
-    binpass = password.encode()
-    kdf = PBKDF2HMAC(
-        algorithm=hashes.SHA512(),
-        length=32,
-        salt=salt,
-        iterations=1500000,
-    )
-    key = base64.urlsafe_b64encode(kdf.derive(binpass))
-
-    fernet = Fernet(key)
-
-    with open("database/db.asc", "rb") as f:
-        encrypted_data = f.read()
-
-    decr = fernet.decrypt(encrypted_data)
-
-    with open("database/db.dat", "wb") as f:
-        f.write(decr)
+except ModuleNotFoundError:
+    print("You have not installed the required modules. Follow these steps to do so:\n\n1. Open the terminal (Linux/MacOS) or command prompt (Windows).\n2. Navigate to this directory and then to the files directory.\n3. Type 'pip install -r dependencies.txt'.\n4. Restart the program.\n\nIf you have followed all the steps correctly, keyvault will work on the next start.")
+    exit()
 
-    with open("database/db.dat", "rb") as f:
-        while True:
+def database_enc():
+    conn = sc.connect("database/keyvault.db")
+    cursor = conn.cursor()
+    if path.isfile("database/keyvault.db"):
+        for _ in range(3):
             try:
-                db = pickle.load(f)
-            except EOFError:
-                print("\nDatabase loaded.")
+                password = gp(prompt = "Enter master password: ")
+                conn.execute(f"PRAGMA key = {password}")
+                conn.execute('''
+                CREATE TABLE IF NOT EXISTS data (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                service TEXT,
+                username TEXT,
+                email TEXT,
+                password TEXT,
+                website TEXT,
+                category TEXT,
+                notes TEXT,
+                totp TEXT )
+                ''')
+                passCorrect = True
                 break
-    shred()
+            except sc.DatabaseError:
+                print("Incorrect password.\n")
+                passCorrect = False
         
-def shred():
-    with open("database/db.dat", "wb") as f:
-        for _ in range(5):
-            f.seek(0)
-            f.write(urandom(path.getsize("database/db.dat")))
-        remove("database/db.dat")
+        if not passCorrect:
+            print("You have entered a wrong password three times. Please restart the program to try again.")
+            exit()
         
-def clearmem():
-    db = rint(100000000000000000000000000000000000000000000000000000000000, 999999999999999999999999999999999999999999999999999999999999)
-    db = None
+    else:
+        print("You have not setup a master password yet. Please set one below.\n")
+        while True:
+            mp, mp2 = gp(prompt = "Enter a secure master password (hidden for privacy!): "), gp(prompt = "Please enter it again: ")
+            if mp == mp2:
+                if len(mp) < 8:
+                    print("\nThe master password you have set is too weak. Please set another one.")
+                else:
+                    break
+            else:
+                print("Both of the passwords are different. Please enter the same password.")
+        conn.execute(f"PRAGMA key = {mp}")
+        conn.commit()
 
 def gen():
+    userpass = input("Type 'u' to generate usernames or 'p' for passwords: ").lower()
+    if userpass == 'u':
+        with open("files/generation/wordlist.txt", "r") as f:
+            words = f.readlines()
+        word1, word2 = rint(0, 8874), rint(0, 8874)
+        username = f"{words[word1][0:-1]}{words[word2][0:-1]}{rint(0, 100000)}"
+        print(username)
+    elif userpass == 'p':
         while True:
             length = int(input("Enter password length (above 8 only): "))
             if length <= 7:
@@ -88,6 +75,8 @@ def gen():
         pool = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789`~@#$%^&*()-_=+]}[{\"';:.>,</?"
         strength = ''.join(sr().choice(pool) for i in range(length))
         print(strength)
+    else:
+        print("Incorrect input.")
 
 def strength():
     password = gp(prompt = "\nEnter the password to check its strength (hidden for privacy!): ")
@@ -117,27 +106,17 @@ def strength():
         else:
             print(f"[PASSWORD STRENGTH]: {passstrength}\n[PASSWORD ENTROPY]: {entropy} bits\nYour password is practically uncrackable.\n")
 
-
 global db
-register(clearmem)
+global conn
+global cursor
+
+database_enc()
 
 with open("files/strength/common-passwords.txt", "r") as f:
     common_passwords = f.read()
 
 print("\nkeyvault initialized.")
 
-for _ in range(4):
-    try:
-        if _ != 3:
-            password = gp(prompt = "\nEnter your password (hidden for privacy!): ")
-            decrypt_db(password)
-            break
-        else:
-            print(" You have exceeded the maximum number of tries.")
-            exit()
-    except (InvalidSignature, InvalidToken):
-        print("Incorrect password.", end = '')
-
 print("keyvault is ready to use! Type 'help' for a list of commands.\n")
 
 while True:
@@ -150,3 +129,6 @@ while True:
         gen()
     elif command == 'strength':
         strength()
+    elif command == 'exit':
+        print("Thank for you using keyvault!")
+        exit()