Password Lock
10 Points
union-type
Instructions
The company you work for is just about to launch its brand new smartphone, called the Smarty 5, it features a brand new camera system, a new design, and a revolutionary new processor running on a new operating system called smartyOS.
The new processor has the power to handle more secure passwords than ever before, and the company has decided to use this to its advantage. They have asked you to implement a password lock system for the phone that will allow the user to set a password and then check if a given password is correct.
Caution
The password system practiced in this exercise is not secure and is only used for educational purposes. It should NOT be used in any real-world applications.
1. Set a password
The phone allows users to use multiple different types of passwords, from a simple digit password to a more secure alphanumeric password and even a password that stores their fingerprint.
These different types of passwords use different types: the digit password uses an Int32, the alphanumeric password uses a String, and the fingerprint password uses a Float64.
Implement the class PasswordLock with an initializer that takes any of the three types of passwords as an argument and stores it in an instance variable called @password.
password_lock = PasswordLock.new(1234)
# => #<PasswordLock:0x7f8e1b8c0b80 @password=1234>2. Encrypt the password
The company has decided to encrypt the password so that it is not stored in plain text and has asked you to implement a method for encrypting it.
Each password type has its unique way of being encrypted:
Int32password: The password is divided by two and rounded to the nearest integer.Stringpassword: The password is reversed.Float64password: The password is multiplied by four.
Implement an instance method called encrypt that takes no arguments and modifies the @password instance variable so that it is encrypted.
password_lock = PasswordLock.new(1234)
# => #<PasswordLock:0x7f8e1b8c0b80 @password=1234>
password_lock.encrypt
# => #<PasswordLock:0x7f8e1b8c0b80 @password=617>3. Check if a password is correct
The company has also asked you to implement a method that checks if a given password is correct.
They want the method to return nil if the password is incorrect and "Unlocked" if the password is correct.
Implement an instance method called unlock? that takes the password to check as an argument.
The method should return nil if the password is incorrect and "Unlocked" if the password is correct.
password_lock = PasswordLock.new(1234)
password_lock.encrypt
password_lock.unlock?(1234)
# => "Unlocked"Password Lock
10 Points
union-type
Instructions
The company you work for is just about to launch its brand new smartphone, called the Smarty 5, it features a brand new camera system, a new design, and a revolutionary new processor running on a new operating system called smartyOS.
The new processor has the power to handle more secure passwords than ever before, and the company has decided to use this to its advantage. They have asked you to implement a password lock system for the phone that will allow the user to set a password and then check if a given password is correct.
Caution
The password system practiced in this exercise is not secure and is only used for educational purposes. It should NOT be used in any real-world applications.
1. Set a password
The phone allows users to use multiple different types of passwords, from a simple digit password to a more secure alphanumeric password and even a password that stores their fingerprint.
These different types of passwords use different types: the digit password uses an Int32, the alphanumeric password uses a String, and the fingerprint password uses a Float64.
Implement the class PasswordLock with an initializer that takes any of the three types of passwords as an argument and stores it in an instance variable called @password.
password_lock = PasswordLock.new(1234)
# => #<PasswordLock:0x7f8e1b8c0b80 @password=1234>2. Encrypt the password
The company has decided to encrypt the password so that it is not stored in plain text and has asked you to implement a method for encrypting it.
Each password type has its unique way of being encrypted:
Int32password: The password is divided by two and rounded to the nearest integer.Stringpassword: The password is reversed.Float64password: The password is multiplied by four.
Implement an instance method called encrypt that takes no arguments and modifies the @password instance variable so that it is encrypted.
password_lock = PasswordLock.new(1234)
# => #<PasswordLock:0x7f8e1b8c0b80 @password=1234>
password_lock.encrypt
# => #<PasswordLock:0x7f8e1b8c0b80 @password=617>3. Check if a password is correct
The company has also asked you to implement a method that checks if a given password is correct.
They want the method to return nil if the password is incorrect and "Unlocked" if the password is correct.
Implement an instance method called unlock? that takes the password to check as an argument.
The method should return nil if the password is incorrect and "Unlocked" if the password is correct.
password_lock = PasswordLock.new(1234)
password_lock.encrypt
password_lock.unlock?(1234)
# => "Unlocked"