So I am currently working through the Bomb Lab and am on the 5th phase. Everywhere I look online my bomb seems to be different from those online so I cannot figure out this cipher. I know the answer to the cipher is "devils" but there doesn't seem to be a consistent key for me to decipher with, and as such I have no clue what to do. I am just starting to learn assembly so this has been pretty difficult for me.
Here is the code for phase_5
Dump of assembler code for function phase_5:
0x0000555555557809 <+0>: endbr64
0x000055555555780d <+4>: push %rbx
0x000055555555780e <+5>: sub $0x10,%rsp
0x0000555555557812 <+9>: mov %rdi,%rbx
0x0000555555557815 <+12>: mov %fs:0x28,%rax
0x000055555555781e <+21>: mov %rax,0x8(%rsp)
0x0000555555557823 <+26>: xor %eax,%eax
0x0000555555557825 <+28>: callq 0x555555557b2e <string_length>
0x000055555555782a <+33>: cmp $0x6,%eax
0x000055555555782d <+36>: jne 0x55555555788d <phase_5+132>
0x000055555555782f <+38>: mov %rbx,%rdi
0x0000555555557832 <+41>: lea 0x1(%rsp),%rax
0x0000555555557837 <+46>: lea -0x5(%rsp),%rsi
0x000055555555783c <+51>: lea 0x198d(%rip),%rcx # 0x5555555591d0 <array.3483>
0x0000555555557843 <+58>: movzbl (%rdi),%edx
0x0000555555557846 <+61>: and $0xf,%edx
0x0000555555557849 <+64>: movzbl (%rcx,%rdx,1),%edx
0x000055555555784d <+68>: mov %dl,0x5(%rax)
0x0000555555557850 <+71>: add $0x1,%rdi
0x0000555555557854 <+75>: sub $0x1,%rax
0x0000555555557858 <+79>: cmp %rsi,%rax
0x000055555555785b <+82>: jne 0x555555557843 <phase_5+58>
0x000055555555785d <+84>: movb $0x0,0x7(%rsp)
0x0000555555557862 <+89>: lea 0x1(%rsp),%rdi
0x0000555555557867 <+94>: lea 0x1938(%rip),%rsi # 0x5555555591a6
0x000055555555786e <+101>: callq 0x555555557b4f <strings_not_equal>
0x0000555555557873 <+106>: test %eax,%eax
0x0000555555557875 <+108>: jne 0x555555557894 <phase_5+139>
0x0000555555557877 <+110>: mov 0x8(%rsp),%rax
0x000055555555787c <+115>: xor %fs:0x28,%rax
0x0000555555557885 <+124>: jne 0x55555555789b <phase_5+146>
0x0000555555557887 <+126>: add $0x10,%rsp
0x000055555555788b <+130>: pop %rbx
0x000055555555788c <+131>: retq
0x000055555555788d <+132>: callq 0x555555557e99 <explode_bomb>
0x0000555555557892 <+137>: jmp 0x55555555782f <phase_5+38>
0x0000555555557894 <+139>: callq 0x555555557e99 <explode_bomb>
0x0000555555557899 <+144>: jmp 0x555555557877 <phase_5+110>
0x000055555555789b <+146>: callq 0x555555557270 <__stack_chk_fail@plt>
here is the code for strings_not_equal
Dump of assembler code for function strings_not_equal:
0x0000555555557b4f <+0>: endbr64
0x0000555555557b53 <+4>: push %r12
0x0000555555557b55 <+6>: push %rbp
0x0000555555557b56 <+7>: push %rbx
0x0000555555557b57 <+8>: mov %rdi,%rbx
0x0000555555557b5a <+11>: mov %rsi,%rbp
0x0000555555557b5d <+14>: callq 0x555555557b2e <string_length>
0x0000555555557b62 <+19>: mov %eax,%r12d
0x0000555555557b65 <+22>: mov %rbp,%rdi
0x0000555555557b68 <+25>: callq 0x555555557b2e <string_length>
0x0000555555557b6d <+30>: mov %eax,%edx
0x0000555555557b6f <+32>: mov $0x1,%eax
0x0000555555557b74 <+37>: cmp %edx,%r12d
0x0000555555557b77 <+40>: jne 0x555555557baa <strings_not_equal+91>
0x0000555555557b79 <+42>: movzbl (%rbx),%edx
0x0000555555557b7c <+45>: test %dl,%dl
0x0000555555557b7e <+47>: je 0x555555557b9e <strings_not_equal+79>
0x0000555555557b80 <+49>: mov $0x0,%eax
0x0000555555557b85 <+54>: cmp %dl,0x0(%rbp,%rax,1)
0x0000555555557b89 <+58>: jne 0x555555557ba5 <strings_not_equal+86>
0x0000555555557b8b <+60>: add $0x1,%rax
0x0000555555557b8f <+64>: movzbl (%rbx,%rax,1),%edx
0x0000555555557b93 <+68>: test %dl,%dl
0x0000555555557b95 <+70>: jne 0x555555557b85 <strings_not_equal+54>
0x0000555555557b97 <+72>: mov $0x0,%eax
0x0000555555557b9c <+77>: jmp 0x555555557baa <strings_not_equal+91>
0x0000555555557b9e <+79>: mov $0x0,%eax
0x0000555555557ba3 <+84>: jmp 0x555555557baa <strings_not_equal+91>
0x0000555555557ba5 <+86>: mov $0x1,%eax
0x0000555555557baa <+91>: pop %rbx
0x0000555555557bab <+92>: pop %rbp
0x0000555555557bac <+93>: pop %r12
0x0000555555557bae <+95>: retq
Any insight would be amazing. Thank you for your time.
