$(1)$ Complete the project #$8,$ 'Message Encryption' on page $240.$ Make use of procedures to separate out the functionality. Upload the asm file and output for a couple of runs. One run should be for input string less than key length and another for more.

Message Encryption

Revise the encryption program in Section $6\mathrm{.}2\mathrm{.}4$ in the following manner: Create an encryption key consisting of multiple characters. Use this key to encrypt and decrypt the plaintext by XORing each character of the key against a corresponding byte in the message. Repeat the key as many times as necessary until all plain text bytes are translated. Suppose, for example, the key were equal to "ABXmv#$7."$

NOTE: Upload an image showing the output with your input, encrypted string & the decrypted string.

mov al$,$status

test al$,00100000$b ; test bit $5$

jnz DeviceOffline