Credentials

global _start:


section .text:

_start:
        mov eax, 0x4            ; write syscall
        mov ebx, 1              ; write file descriptor
        mov ecx, message        ; use msg as buffer
        mov edx, message_lngth  ; use msg_lngth as i/o pointer
        int 0x80                ; invoke syscall
        mov eax, 0x3            ; read syscall
        mov ebx, 0              ; read file descriptor
        mov ecx, str            ; use str as the message
        xor edx, edx            ; clear edx
        add edx, ecx            ; add edx with string supplied
        push ecx                ; push str to stack
        mov ecx, message2       ; use msg2 as the buffer
        mov esi, str
        add esi, ecx            ; add user input to the buffer
        pop ecx                 ; resore ecx str
        cmp byte[ecx], 0x62
        jne TYPE
        mov eax, 0x4
        mov ebx, 1
        mov ecx, str
        add ecx, edx
        int 0x80                ; invoke
        mov eax, 0x1            ; exit
        mov ebx, 0              ; return 0

TYPE:
        pop ecx
        mov ecx, message2
        add ecx, str
        int 0x80
        mov eax, 0x1
        mov ebx, 0

section .rodata:
        message: db "What's your name?", 0x0A ; \n
        message2: db "Your name is ", 0x0A
        message_lngth: equ $-message    ; notates address, gives difference of message                                          and msg_length
        str: db 0x3