1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
# OBJDUMP
# phase_5(char* input)
# %index = %rax
# %input = %rdi
# FOR loop, index = [0, 6)
40108b: 0f b6 0c 03 movzbl (%rbx,%index,1),%ecx # rcx = *(input + index), get each input char
40108f: 88 0c 24 mov %cl,(%rsp) # stacktop = rcx
401092: 48 8b 14 24 mov (%rsp),%rdx # rdx = stacktop = rcx
401096: 83 e2 0f and $0xf,%edx # rdx = stacktop & 0xF
401099: 0f b6 92 b0 24 40 00 movzbl 0x4024b0(%rdx),%edx # rdx = *(0x4024b0 + rdx), get lower 4 bits
# rdx = *[*(input+index) & 0xF + 0x4024b0]
# find 0x4024b0 + bias
4010a0: 88 54 04 10 mov %dl,0x10(%rsp,%index,1) # *(rsp+index+10) = rdx (the correspoding data)
4010a4: 48 83 c0 01 add $0x1,%index # index++
4010a8: 48 83 f8 06 cmp $0x6,%index # if (index == 6) break
4010ac: 75 dd jne 40108b <phase_5+0x29>
# rsp+(10 to 15) are where passwords are saved, on stack
4010ae: c6 44 24 16 00 movb $0x0,0x16(%rsp) # \0
4010b3: be 5e 24 40 00 mov $0x40245e,%esi
4010b8: 48 8d 7c 24 10 lea 0x10(%rsp),%rdi # compare (coded input) against ($0x40245e)
4010bd: e8 76 02 00 00 call 401338 <strings_not_equal>
4010c2: 85 c0 test %index,%index
4010c4: 74 13 je 4010d9 <phase_5+0x77>
|