Reverse Engineering for Beginners

(avery) #1

CHAPTER 79. “QR9”: RUBIK’S CUBE INSPIRED AMATEUR CRYPTO-ALGORITHM CHAPTER 79. “QR9”: RUBIK’S CUBE INSPIRED AMATEUR CRYPTO-ALGORITHM


.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
.text:0054118B mov al, [edi]
.text:0054118D push eax
.text:0054118E push ebx
.text:0054118F push ebp
.text:00541190 push esi
.text:00541191 call set_bit
.text:00541196 add esp, 10h
.text:00541199 inc edi
.text:0054119A dec esi
.text:0054119B cmp esi, 0FFFFFFFFh
.text:0054119E jg short loc_54118B
.text:005411A0 inc ebx
.text:005411A1 cmp ebx, 8
.text:005411A4 jl short loc_541186
.text:005411A6 pop edi
.text:005411A7 pop esi
.text:005411A8 pop ebp
.text:005411A9 pop ebx
.text:005411AA add esp, 40h
.text:005411AD retn
.text:005411AD rotate3 endp
.text:005411AD
.text:005411AE align 10h
.text:005411B0

Free download pdf