I am looking for help with this project. The code does not need to work as of ye

ID: 3712568 • Letter: I

Question

I am looking for help with this project. The code does not need to work as of yet, because this is the first try. Most of the code is provided.

We will be extending the Caesar cypher we looked at earlier into a full-fledged password saver. The program will be able to:

Lookup passwords for websites

Add new passwords for websites (encrypting them with the caesar cypher)

Store these passwords to a file on the computer

Load passwords from a stored password file

Most of the code is provided but there are some critical components missing. You will need to add these components.

Extra Credit (max 5 points): Add additional menu items to the program. For instance, add the ability to delete passwords.

Explanation / Answer

Please find the code below. If possible please share the decrypt logic. I can implement the logic to get the answer. As in the question we can use encrypt message is written I have used the same for decrypting the message.

Python code.

import csv
import sys

#The password list - We start with it populated for testing purposes
passwords = [["yahoo","XqffoZeo"],["google","CoIushujSetu"]]

#The password file name to store the passwords to
passwordFileName = "samplePasswordFile"

#The encryption key for the caesar cypher
encryptionKey=16

#Caesar Cypher Encryption
def passwordEncrypt (unencryptedMessage, key):

#We will start with an empty string as our encryptedMessage
encryptedMessage = ''

    #For each symbol in the unencryptedMessage we will add an encrypted symbol into the encryptedMessage
    for symbol in unencryptedMessage:
        if symbol.isalpha():
            num = ord(symbol)
            num += key

            if symbol.isupper():
                if num > ord('Z'):
                    num -= 26
                elif num < ord('A'):
                    num += 26
            elif symbol.islower():
                if num > ord('z'):
                    num -= 26
                elif num < ord('a'):
                    num += 26

            encryptedMessage += chr(num)
        else:
            encryptedMessage += symbol

return encryptedMessage

def loadPasswordFile(fileName):

    with open(fileName, newline='') as csvfile:
        passwordreader = csv.reader(csvfile)
        passwordList = list(passwordreader)

return passwordList

def savePasswordFile(passwordList, fileName):

    with open(fileName, 'w+', newline='') as csvfile:
        passwordwriter = csv.writer(csvfile)
        passwordwriter.writerows(passwordList)

while True:
    print("What would you like to do:")
    print(" 1. Open password file")
    print(" 2. Lookup a password")
    print(" 3. Add a password")
    print(" 4. Save password file")
    print(" 5. Print the encrypted password list (for testing)")
    print(" 6. Quit program")
    print("Please enter a number (1-4)")
    choice = input()

if(choice == '1'): #Load the password list from a file
passwords = loadPasswordFile(passwordFileName)

    if(choice == '2'): #Lookup at password
        print("Which website do you want to lookup the password for?")
        for keyvalue in passwords:
            print(keyvalue[0])
        passwordToLookup = input()

        ####### YOUR CODE HERE ######
        #You will need to find the password that matches the website
        #You will then need to decrypt the password

        #
        #1. Create a loop that goes through each item in the password list
        # You can consult the reading on lists in Week 5 for ways to loop through a list
        #
        #2. Check if the name is found. To index a list of lists you use 2 square backet sets
        #   So passwords[0][1] would mean for the first item in the list get it's 2nd item (remember, lists start at 0)
        #   So this would be 'XqffoZeo' in the password list given what is predefined at the top of the page.
        #   If you created a loop using the syntax described in step 1, then i is your 'iterator' in the list so you
        #   will want to use i in your first set of brackets.
        #
        #3. If the name is found then decrypt it. Decrypting is that exact reverse operation from encrypting. Take a look at the
        # caesar cypher lecture as a reference. You do not need to write your own decryption function, you can reuse passwordEncrypt
        #
        # Write the above one step at a time. By this I mean, write step 1... but in your loop print out every item in the list
        # for testing purposes. Then write step 2, and print out the password but not decrypted. Then write step 3. This way
        # you can test easily along the way.
        #

# It will be great if you could share the decrypt password logic
#iteratinng over all passwords
        for website in passwords:
# If the website asked is found then decrypt password. print it and break
            if(website[0] == passwordToLookup):
                decryptedPassword = passwordEncrypt(website[1],encryptionKey);
                print("Password for website {} is {}".format(website[0],decryptedPassword))
                break;

####### YOUR CODE HERE ######

    if(choice == '3'):
        print("What website is this password for?")
        website = input()
        print("What is the password?")
        unencryptedPassword = input()

####### YOUR CODE HERE ######
#You will need to encrypt the password and store it in the list of passwords

        #The encryption function is already written for you
        #Step 1: You can say encryptedPassword = passwordEncrypt(unencryptedPassword,encryptionKey)]
        #the encryptionKey variable is defined already as 16, don't change this
        #Step 2: create a list of size 2, first item the website name and the second item the password.
        #Step 3: append the list from Step 2 to the password list

# Generating the encrypted message
        encryptedPassword = passwordEncrypt(unencryptedPassword, encryptionKey);
        # creating a list of 2 elements
        websiteEncPwd = [website, encryptedPassword]

# Appending that list to list of passwords.
passwords.append(websiteEncPwd);

####### YOUR CODE HERE ######

if(choice == '4'): #Save the passwords to a file
savePasswordFile(passwords,passwordFileName)

    if(choice == '5'): #print out the password list
        for keyvalue in passwords:
            print(', '.join(keyvalue))

if(choice == '6'): #quit our program
sys.exit()

print()
print()

Output

$ python3 pyPass.py
What would you like to do:
1. Open password file
2. Lookup a password
3. Add a password
4. Save password file
5. Print the encrypted password list (for testing)
6. Quit program
Please enter a number (1-4)
1

What would you like to do:
1. Open password file
2. Lookup a password
3. Add a password
4. Save password file
5. Print the encrypted password list (for testing)
6. Quit program
Please enter a number (1-4)
2
Which website do you want to lookup the password for?
yahoo
google
yahoo
Password for website yahoo is NgvvePue

What would you like to do:
1. Open password file
2. Lookup a password
3. Add a password
4. Save password file
5. Print the encrypted password list (for testing)
6. Quit program
Please enter a number (1-4)
3
What website is this password for?
youtube
What is the password?
chegg

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