assembly programming use MASM(X86), Dont use screen clear function such as Clrscr.

Make a program that gets a plain text and a key as input. Use the key to encrypt and decrypt the plain text by rotating each character of the key against a corresponding character in the message. Write a procedure that performs encryption.

*rotate : bitwise rotate instruction

*character : fits in 8-bit

NOTE:

1. The length of plain text does not exceed 40 characters.
2. Enter character () is not counted in string length.
3. The size of each key element does not exceed 1 byte and the length of key does not exceed 10 integers.
4. The negative value of key indicates a rotation to left and a positive value indicates a rotation to right.
5. If the length of key is less than plain text, repeat the key as many times as necessary until all plain text is translated.

Ex. Plain text : Assembly, Key : -2, 4, 1, 0, -3

A	s	s	e	m	b	l	y
2 Rleft	4 Rright	1 Rright	0 Rotate	3 Rleft	2 Rleft	4 Rright	1 Rright

6. Print out the original text, encrypted text, and decrypted text once the user enters a text and a key.
7. Input Enter character () to finish the program.

C:\>s171234

Enter a plain text : This is the secret message

Enter a key : -2 4 1 0 -3

Original Text : This is the secret message

Encrypted Text : (print message encrypted by given key)

Decrypted Text : This is the secret message

Enter a plain text : I am your father

Enter a key : 1 -2 3 -4 5 -6 7 -8

Original Text : I am your father

Encrypted Text : (print message encrypted by given key)

Decrypted Text : I am your father

Enter a plain text :

Bye!

C:\>