Assembly Language for Beginners

(Jeff_L) #1

8.6. “QR9”: RUBIK’S CUBE INSPIRED AMATEUR CRYPTO-ALGORITHM


.text:00541119
.text:00541119 loc_541119: ; CODE XREF: rotate2+57
.text:00541119 xor esi, esi ; loop2 counter
.text:0054111B
.text:0054111B loc_54111B: ; CODE XREF: rotate2+4E
.text:0054111B mov al, [ebx+esi] ; get byte from internal array
.text:0054111E push eax
.text:0054111F push edi ; loop1 counter
.text:00541120 push esi ; loop2 counter
.text:00541121 push ebp ; arg_0
.text:00541122 call set_bit
.text:00541127 add esp, 10h
.text:0054112A inc esi ; increment loop2 counter
.text:0054112B cmp esi, 8
.text:0054112E jl short loc_54111B
.text:00541130 dec edi ; decrement loop2 counter
.text:00541131 add ebx, 8
.text:00541134 cmp edi, 0FFFFFFFFh
.text:00541137 jg short loc_541119
.text:00541139 pop edi
.text:0054113A pop esi
.text:0054113B pop ebp
.text:0054113C pop ebx
.text:0054113D add esp, 40h
.text:00541140 retn
.text:00541140 rotate2 endp
.text:00541140
.text:00541141 align 10h
.text:00541150
.text:00541150 ; =============== S U B R O U T I N E =======================================
.text:00541150
.text:00541150
.text:00541150 rotate3 proc near ; CODE XREF: rotate_all_with_password+66
.text:00541150
.text:00541150 var_40 = byte ptr -40h
.text:00541150 arg_0 = dword ptr 4
.text:00541150
.text:00541150 sub esp, 40h
.text:00541153 push ebx
.text:00541154 push ebp
.text:00541155 mov ebp, [esp+48h+arg_0]
.text:00541159 push esi
.text:0054115A push edi
.text:0054115B xor edi, edi
.text:0054115D lea ebx, [esp+50h+var_40]
.text:00541161
.text:00541161 loc_541161: ; CODE XREF: rotate3+2E
.text:00541161 xor esi, esi
.text:00541163
.text:00541163 loc_541163: ; CODE XREF: rotate3+25
.text:00541163 push esi
.text:00541164 push ebp
.text:00541165 push edi
.text:00541166 call get_bit
.text:0054116B add esp, 0Ch
.text:0054116E mov [ebx+esi], al
.text:00541171 inc esi
.text:00541172 cmp esi, 8
.text:00541175 jl short loc_541163
.text:00541177 inc edi
.text:00541178 add ebx, 8
.text:0054117B cmp edi, 8
.text:0054117E jl short loc_541161
.text:00541180 xor ebx, ebx
.text:00541182 lea edi, [esp+50h+var_40]
.text:00541186
.text:00541186 loc_541186: ; CODE XREF: rotate3+54
.text:00541186 mov esi, 7
.text:0054118B
.text:0054118B loc_54118B: ; CODE XREF: rotate3+4E

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