The main deliverable of the programming assignment is a MIPS$32$ assembly file that implements a program. The program asks the user for requested operation $($e$$ for encryption and $$d$$ for decryption$).$

The program then asks the user for the data to encrypt or decrypt; the data is a plain$-$text message for encryption, whereas the data is a hexadecimal string $($i$.$e$.,$ a string of hexadecimal digits$)$ for decryption.

Finally, the program asks for plain$-$text password to use for encryption or decryption. An example of how the inputs and outputs should be handled is shown in Figure $2.$ Please, pay attention to the format

of the output. The output of the program should be the last line with either: $$Encrypted Message $=$

or $$Decrypted Message $=.$ The output strings should be between double$-$qoutes, as shown in Figure $2.$

Testing and Verification$$You should spend a lot of effort writing testing and verification for your program. Make sure that you test every corner case you can think of$.$ Also, verify your

implementation with different emulators. Possible emulators: SPIM, jsSPIM, or QEMU. As usual,

refrain from using pseudo$-$instructions as they are not universally supported by every assembler.

Choose an operation $($e $=$ encrypt, d $=$ decrypt$)$: e

What is the message to encrypt? Ans Q$5($c$)=$ Oxdeadbeef

Password to use: SuperSecretP$0$asu$0$rd$!$

Encrypted Message $="$af$2$d$7809$efef$01575802$ea$099$d$6$a$475$f$6$f$204$f$5$f$6129$a$949"$

Choose an operation $($e $=$ encrypt, d $=$ decrypt$)$: d

What is the message to decrypt? af$2$d$7809$efef$01575802$ea$099$d$6$a$475$f$6$f$204$f$5$f$6129$a$949$

Password to use: SuperSecretP$0$asw$0$rd$!$

Decrypted Message $=$ "Ans Q$5($c$)=$ Oxdeadbeef"