vigenere.asz~

%include "io.mac"

section .bss
	plaintext_len: resd 1
	key_len: resd 1

section .text
    global vigenere
    extern printf

vigenere:
    ;; DO NOT MODIFY
    push    ebp
    mov     ebp, esp
    pusha

    mov     edx, [ebp + 8]      ; ciphertext
    mov     esi, [ebp + 12]     ; plaintext
    mov     ecx, [ebp + 16]     ; plaintext_len
    mov     edi, [ebp + 20]     ; key
    mov     ebx, [ebp + 24]     ; key_len
    ;; DO NOT MODIFY
	
    ;; TODO: Implement the Vigenere cipher

	mov [plaintext_len], ecx
	mov [key_len], ebx
	;; TODO: implementare folosind while pentru parcurgerea plaintext
	xor ecx, ecx
	xor eax, eax
	xor ebx, ebx
criptare:
	cmp ebx, [key_len]
	jge actualizare_ebx
back:
	mov al, byte[esi + ecx]
	mov ah, byte[edi + ebx]
	cmp al, 'A'
	jl non_char
	cmp al, 'Z'
	jle found
	cmp al, 'a'
	jl non_char
	cmp al, 'z'
	jg non_char
	;;TODO gasit litera mica
	jmp end
found: ;; TODO: gasit litera mare
	jmp end
non_char:
	mov byte[edx + ecx], al
end:
	inc ebx
	inc ecx
	cmp ecx, [plaintext_len]
	jle criptare
	;; End Vigenere Cipher
    ;; DO NOT MODIFY
    popa
    leave
    ret
actualizare_ebx:
	xor ebx, ebx
	jmp back
    ;; DO NOT MODIFY