Added Password Manager for Issue #138

Password Manager/README.MD

@@ -0,0 +1,57 @@
+# Password Manager
+
+## Usage
+Run the pwd_mgmr.py file and you will be prompted for the rest of the required inputs
+
+### Getting Started:
+1.  Select Option (1) Create a new key that will be used to encrypt your password file.
+2.  Select Option (3) Create a new password file that will be used to hold your encrypted passwords.
+3.  Select Option (5) Add a new password to the password file. \n
+
+### Retrieving or Adding Passords:
+1.  Select Option (2) Load the existing key so it can be used to encrypt new passwords or retrieve passwords from the password file.
+2.  Select Option (4) Load the existing password file so it can be used to add or retrieve passwords.
+3. Select Option (5) Add a new password to the password file.
+4. Select Option (6) Retrieve a password for a site.
+
+## Example
+
+What would you like to do?
+    (1) Create a new key
+    (2) Load an existing key
+    (3) Create new password file
+    (4) Load existing password file
+    (5) Add a new password
+    (6) Get a password for a site
+    (7) Get the list of sites
+    (m) Menu
+    (h) Help
+    (q) Quit
+Enter your choice: h
+Getting Started:
+    1.  Select Option (1) Create a new key that will be used to encrypt your password file.
+    2.  Select Option (3) Create a new password file that will be used to hold your encrypted passwords.
+    3.  Select Option (5) Add a new password to the password file.
+
+Retrieving or Adding Passords:
+    1.  Select Option (2) Load the existing key so it can be used to encrypt new passwords or retrieve passwords from the password file.
+    2.  Select Option (4) Load the existing password file so it can be used to add or retrieve passwords.
+    3a. Select Option (5) Add a new password to the password file.
+    3b. Select Option (6) Retrieve a password for a site.
+Enter your choice: 1 
+Invalid Choice!
+Enter your choice: 1
+Enter the path: C:\pwds\mykey.key 
+Enter your choice: 3
+Enter the path: C:\pwds\pwds.pass
+Enter your choice: 5
+Enter the site: facebook
+Enter the password: password123
+Enter your choice: 6
+What site do you want: facebook
+password123
+Enter your choice: 7
+List of Sites:
+facebook
+Enter your choice: q
+Bye!

Password Manager/pwd_mgmr.py

@@ -0,0 +1,121 @@
+from cryptography.fernet import Fernet
+# Symmetric Key Encyrption Class
+
+# Password Manager Class that will create & load passwords from an encrypted file
+class PasswordManager:
+    def __init__(self):
+        self.key = None
+        self.pwd_file = None
+        self.pwd_dict = {}
+
+    def create_key(self, path):
+        self.key = Fernet.generate_key()
+        with open(path, 'wb') as f:
+            f.write(self.key)
+
+    def load_key(self, path):
+        with open(path, 'rb') as f:
+            self.key = f.read()
+
+    # init_values is a dictionary
+    def create_pwd_file(self, path, init_values=None):
+        self.pwd_file = path
+        if init_values is not None:
+            for key, values in init_values.items():
+                self.add_password(self, key, values)
+
+    def load_pwd_file(self, path):
+        self.pwd_file = path
+        with open(path, 'r') as f:
+            for line in f:
+                site, encrypted = line.split(":")
+                # Loads the site and the associated encrypted password. Password must be encoded before decyprtion and decoded before returning text
+                self.pwd_dict[site] = Fernet(self.key).decrypt(encrypted.encode()).decode()
+
+    def add_password(self, site, password):
+        self.pwd_dict[site] = password
+        if self.pwd_file is not None:
+            with open(self.pwd_file, 'a') as f:
+                encrypted = Fernet(self.key).encrypt(password.encode())
+                s = ":"
+                written = site + s + encrypted.decode() + "\n"
+                f.write(written)
+
+    def get_password(self, site):
+        return self.pwd_dict[site]
+
+    def get_sites(self):
+        print("List of Sites:")
+        for a in self.pwd_dict.keys():
+            print(a)
+
+def main():
+    pm = PasswordManager()
+    print("""What would you like to do?
+    (1) Create a new key
+    (2) Load an existing key
+    (3) Create new password file
+    (4) Load existing password file
+    (5) Add a new password
+    (6) Get a password for a site
+    (7) Get the list of sites
+    (m) Menu
+    (h) Help
+    (q) Quit""")
+    done = False
+
+    while not done:
+
+        choice = input("Enter your choice: ")
+        choice = choice.lower()
+        match choice:
+            case "1":
+                path = input("Enter the path: ")
+                pm.create_key(path)
+            case "2":
+                path = input("Enter the path: ")
+                pm.load_key(path)
+            case "3":
+                path = input("Enter the path: ")
+                pm.create_pwd_file(path, init_values=None)
+            case "4":
+                path = input ("Enter the path: ")
+                pm.load_pwd_file(path)
+            case "5":
+                site = input("Enter the site: ")
+                password = input("Enter the password: ")
+                pm.add_password(site, password)
+            case "6":
+                site = input("What site do you want: ")
+                print(pm.get_password(site))
+            case "7":
+                pm.get_sites()
+            case "m":
+                print("""What would you like to do?
+    (1) Create a new key
+    (2) Load an existing key
+    (3) Create new password file
+    (4) Load existing password file
+    (5) Add a new password
+    (6) Get a password for a site
+    (m) Menu
+    (h) Help
+    (q) Quit""")
+            case "h": 
+                print("""Getting Started:
+    1.  Select Option (1) Create a new key that will be used to encrypt your password file.
+    2.  Select Option (3) Create a new password file that will be used to hold your encrypted passwords.
+    3.  Select Option (5) Add a new password to the password file. \n
+Retrieving or Adding Passords:
+    1.  Select Option (2) Load the existing key so it can be used to encrypt new passwords or retrieve passwords from the password file.
+    2.  Select Option (4) Load the existing password file so it can be used to add or retrieve passwords.
+    3a. Select Option (5) Add a new password to the password file.
+    3b. Select Option (6) Retrieve a password for a site.""")
+            case "q":
+                done = True
+                print("Bye!")
+            case _:
+                print("Invalid Choice!")
+
+if __name__ == '__main__':
+    main()

README.md

@@ -43,6 +43,7 @@ Incase there is something that needs to be followed while executing the python s
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 | Password Generator                   | [Password Generator](https://github.com/DhanushNehru/Python-Scripts/tree/master/Password%20Generator)                                         | Generates a random password                                                                                         |
+| Password Manager                     | [Password Manager](https://github.com/nem5345/Python-Scripts/tree/master/Password%20Manager)                                                   | Generate and interact with a password manager                                                                       |
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