请教汇编达人，帮忙看一下这个函数的算法
答案:1 悬赏:0 手机版
解决时间 2021-03-09 18:34
- 提问者网友：流星是天使的眼泪
- 2021-03-09 14:10
请教汇编达人，帮忙看一下这个函数的算法
最佳答案
- 五星知识达人网友：轻雾山林
- 2021-03-09 15:14
004096E0 /$ 55 push ebp
004096E1 |. 8BEC mov ebp,esp
004096E3 |. 83EC 0C sub esp,0xC
004096E6 |. 33D2 xor edx,edx
004096E8 |. 53 push ebx
004096E9 |. 57 push edi
004096EA |. 3BC2 cmp eax,edx
004096EC |. 0F84 09010000 je Lstj.004097FB
004096F2 |. 8BC8 mov ecx,eax
004096F4 |. 8D79 01 lea edi,dword ptr ds:[ecx+0x1]
004096F7 |> 8A19 /mov bl,byte ptr ds:[ecx]
004096F9 |. 41 |inc ecx
004096FA |. 84DB |test bl,bl
004096FC |.^ 75 F9 \jnz XLstj.004096F7
004096FE |. 2BCF sub ecx,edi
00409700 |. 83F9 01 cmp ecx,0x1
00409703 |. 0F82 F2000000 jb Lstj.004097FB
00409709 |. 56 push esi
0040970A |. 33F6 xor esi,esi
0040970C |. 8955 F8 mov [local.2],edx
0040970F |. 3955 08 cmp [arg.1],edx
00409712 |. 0F84 DA000000 je Lstj.004097F2
00409718 |. 8B4D 0C mov ecx,[arg.2]
0040971B |. 3BCA cmp ecx,edx
0040971D |. 0F84 CF000000 je Lstj.004097F2
00409723 |. 8955 FC mov [local.1],edx
00409726 |. 8D79 01 lea edi,dword ptr ds:[ecx+0x1]
00409729 |. 8DA424 000000>lea esp,dword ptr ss:[esp]
00409730 |> 8A19 /mov bl,byte ptr ds:[ecx]
00409732 |. 41 |inc ecx
00409733 |. 84DB |test bl,bl
00409735 |.^ 75 F9 \jnz XLstj.00409730
00409737 |. 2BCF sub ecx,edi
00409739 |. 0F84 A2000000 je Lstj.004097E1
0040973F |. 90 nop
00409740 |> 8B7D FC /mov edi,[local.1]
00409743 |. 8B5D 0C |mov ebx,[arg.2]
00409746 |. 8A1C1F |mov bl,byte ptr ds:[edi+ebx]
00409749 |. B9 A8374700 |mov ecx,Lstj.004737A8 ; ASCII "123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz[]"
0040974E |. 80FB 30 |cmp bl,0x30
00409751 |. 74 05 |je XLstj.00409758
00409753 |> 41 |/inc ecx
00409754 |. 3819 ||cmp byte ptr ds:[ecx],bl
00409756 |.^ 75 FB |\jnz XLstj.00409753
00409758 |> 83E7 03 |and edi,0x3
0040975B |. 74 37 |je XLstj.00409794
0040975D |. 0FBE1C06 |movsx ebx,byte ptr ds:[esi+eax]
00409761 |. 81EB A8374700 |sub ebx,Lstj.004737A8 ; ASCII "123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz[]"
00409767 |. 03D9 |add ebx,ecx
00409769 |. B9 04000000 |mov ecx,0x4
0040976E |. 2BCF |sub ecx,edi
00409770 |. 83E3 3F |and ebx,0x3F
00409773 |. 03C9 |add ecx,ecx
00409775 |. D3E3 |shl ebx,cl
00409777 |. 46 |inc esi
00409778 |. 0BD3 |or edx,ebx
0040977A |. 803C06 00 |cmp byte ptr ds:[esi+eax],0x0
0040977E |. 75 02 |jnz XLstj.00409782
00409780 |. 33F6 |xor esi,esi
00409782 |> 8B4D F8 |mov ecx,[local.2]
00409785 |. 8B7D 08 |mov edi,[arg.1]
00409788 |. 881439 |mov byte ptr ds:[ecx+edi],dl
0040978B |. 41 |inc ecx
0040978C |. 894D F8 |mov [local.2],ecx
0040978F |. C1EA 08 |shr edx,0x8
00409792 |. EB 18 |jmp XLstj.004097AC
00409794 |> 0FBE1406 |movsx edx,byte ptr ds:[esi+eax]
00409798 |. 81EA A8374700 |sub edx,Lstj.004737A8 ; ASCII "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz[]"
0040979E |. 03D1 |add edx,ecx
004097A0 |. 46 |inc esi
004097A1 |. 83E2 3F |and edx,0x3F
004097A4 |. 803C06 00 |cmp byte ptr ds:[esi+eax],0x0
004097A8 |. 75 02 |jnz XLstj.004097AC
004097AA |. 33F6 |xor esi,esi
004097AC |> 8B4D 0C |mov ecx,[arg.2]
004097AF |. FF45 FC |inc [local.1]
004097B2 |. 8D79 01 |lea edi,dword ptr ds:[ecx+0x1]
004097B5 |> 8A19 |/mov bl,byte ptr ds:[ecx]
004097B7 |. 41 ||inc ecx
004097B8 |. 84DB ||test bl,bl
004097BA |.^ 75 F9 |\jnz XLstj.004097B5
004097BC |. 2BCF |sub ecx,edi
004097BE |. 394D FC |cmp [local.1],ecx
004097C1 |.^ 0F82 79FFFFFF \jb Lstj.00409740
004097C7 |. 85D2 test edx,edx
004097C9 |. 74 16 je XLstj.004097E1
004097CB |. 8B45 F8 mov eax,[local.2]
004097CE |. 8B4D 08 mov ecx,[arg.1]
004097D1 |. 881408 mov byte ptr ds:[eax+ecx],dl
004097D4 |. 5E pop esi
004097D5 |. 40 inc eax
004097D6 |. 8BD1 mov edx,ecx
004097D8 |. 5F pop edi
004097D9 |. 881C10 mov byte ptr ds:[eax+edx],bl
004097DC |. 5B pop ebx
004097DD |. 8BE5 mov esp,ebp
004097DF |. 5D pop ebp
004097E0 |. C3 retn
004097E1 |> 8B45 F8 mov eax,[local.2]
004097E4 |. 8B55 08 mov edx,[arg.1]
004097E7 |. 5E pop esi
004097E8 |. 5F pop edi
004097E9 |. C60410 00 mov byte ptr ds:[eax+edx],0x0
004097ED |. 5B pop ebx
004097EE |. 8BE5 mov esp,ebp
004097F0 |. 5D pop ebp
004097F1 |. C3 retn
004097F2 |> 5E pop esi
004097F3 |. 5F pop edi
004097F4 |. 33C0 xor eax,eax
004097F6 |. 5B pop ebx
004097F7 |. 8BE5 mov esp,ebp
004097F9 |. 5D pop ebp
004097FA |. C3 retn
004097FB |> 5F pop edi
004097FC |. 33C0 xor eax,eax
004097FE |. 5B pop ebx
004097FF |. 8BE5 mov esp,ebp
00409801 |. 5D pop ebp
00409802 \. C3 retn
004096E1 |. 8BEC mov ebp,esp
004096E3 |. 83EC 0C sub esp,0xC
004096E6 |. 33D2 xor edx,edx
004096E8 |. 53 push ebx
004096E9 |. 57 push edi
004096EA |. 3BC2 cmp eax,edx
004096EC |. 0F84 09010000 je Lstj.004097FB
004096F2 |. 8BC8 mov ecx,eax
004096F4 |. 8D79 01 lea edi,dword ptr ds:[ecx+0x1]
004096F7 |> 8A19 /mov bl,byte ptr ds:[ecx]
004096F9 |. 41 |inc ecx
004096FA |. 84DB |test bl,bl
004096FC |.^ 75 F9 \jnz XLstj.004096F7
004096FE |. 2BCF sub ecx,edi
00409700 |. 83F9 01 cmp ecx,0x1
00409703 |. 0F82 F2000000 jb Lstj.004097FB
00409709 |. 56 push esi
0040970A |. 33F6 xor esi,esi
0040970C |. 8955 F8 mov [local.2],edx
0040970F |. 3955 08 cmp [arg.1],edx
00409712 |. 0F84 DA000000 je Lstj.004097F2
00409718 |. 8B4D 0C mov ecx,[arg.2]
0040971B |. 3BCA cmp ecx,edx
0040971D |. 0F84 CF000000 je Lstj.004097F2
00409723 |. 8955 FC mov [local.1],edx
00409726 |. 8D79 01 lea edi,dword ptr ds:[ecx+0x1]
00409729 |. 8DA424 000000>lea esp,dword ptr ss:[esp]
00409730 |> 8A19 /mov bl,byte ptr ds:[ecx]
00409732 |. 41 |inc ecx
00409733 |. 84DB |test bl,bl
00409735 |.^ 75 F9 \jnz XLstj.00409730
00409737 |. 2BCF sub ecx,edi
00409739 |. 0F84 A2000000 je Lstj.004097E1
0040973F |. 90 nop
00409740 |> 8B7D FC /mov edi,[local.1]
00409743 |. 8B5D 0C |mov ebx,[arg.2]
00409746 |. 8A1C1F |mov bl,byte ptr ds:[edi+ebx]
00409749 |. B9 A8374700 |mov ecx,Lstj.004737A8 ; ASCII "123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz[]"
0040974E |. 80FB 30 |cmp bl,0x30
00409751 |. 74 05 |je XLstj.00409758
00409753 |> 41 |/inc ecx
00409754 |. 3819 ||cmp byte ptr ds:[ecx],bl
00409756 |.^ 75 FB |\jnz XLstj.00409753
00409758 |> 83E7 03 |and edi,0x3
0040975B |. 74 37 |je XLstj.00409794
0040975D |. 0FBE1C06 |movsx ebx,byte ptr ds:[esi+eax]
00409761 |. 81EB A8374700 |sub ebx,Lstj.004737A8 ; ASCII "123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz[]"
00409767 |. 03D9 |add ebx,ecx
00409769 |. B9 04000000 |mov ecx,0x4
0040976E |. 2BCF |sub ecx,edi
00409770 |. 83E3 3F |and ebx,0x3F
00409773 |. 03C9 |add ecx,ecx
00409775 |. D3E3 |shl ebx,cl
00409777 |. 46 |inc esi
00409778 |. 0BD3 |or edx,ebx
0040977A |. 803C06 00 |cmp byte ptr ds:[esi+eax],0x0
0040977E |. 75 02 |jnz XLstj.00409782
00409780 |. 33F6 |xor esi,esi
00409782 |> 8B4D F8 |mov ecx,[local.2]
00409785 |. 8B7D 08 |mov edi,[arg.1]
00409788 |. 881439 |mov byte ptr ds:[ecx+edi],dl
0040978B |. 41 |inc ecx
0040978C |. 894D F8 |mov [local.2],ecx
0040978F |. C1EA 08 |shr edx,0x8
00409792 |. EB 18 |jmp XLstj.004097AC
00409794 |> 0FBE1406 |movsx edx,byte ptr ds:[esi+eax]
00409798 |. 81EA A8374700 |sub edx,Lstj.004737A8 ; ASCII "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz[]"
0040979E |. 03D1 |add edx,ecx
004097A0 |. 46 |inc esi
004097A1 |. 83E2 3F |and edx,0x3F
004097A4 |. 803C06 00 |cmp byte ptr ds:[esi+eax],0x0
004097A8 |. 75 02 |jnz XLstj.004097AC
004097AA |. 33F6 |xor esi,esi
004097AC |> 8B4D 0C |mov ecx,[arg.2]
004097AF |. FF45 FC |inc [local.1]
004097B2 |. 8D79 01 |lea edi,dword ptr ds:[ecx+0x1]
004097B5 |> 8A19 |/mov bl,byte ptr ds:[ecx]
004097B7 |. 41 ||inc ecx
004097B8 |. 84DB ||test bl,bl
004097BA |.^ 75 F9 |\jnz XLstj.004097B5
004097BC |. 2BCF |sub ecx,edi
004097BE |. 394D FC |cmp [local.1],ecx
004097C1 |.^ 0F82 79FFFFFF \jb Lstj.00409740
004097C7 |. 85D2 test edx,edx
004097C9 |. 74 16 je XLstj.004097E1
004097CB |. 8B45 F8 mov eax,[local.2]
004097CE |. 8B4D 08 mov ecx,[arg.1]
004097D1 |. 881408 mov byte ptr ds:[eax+ecx],dl
004097D4 |. 5E pop esi
004097D5 |. 40 inc eax
004097D6 |. 8BD1 mov edx,ecx
004097D8 |. 5F pop edi
004097D9 |. 881C10 mov byte ptr ds:[eax+edx],bl
004097DC |. 5B pop ebx
004097DD |. 8BE5 mov esp,ebp
004097DF |. 5D pop ebp
004097E0 |. C3 retn
004097E1 |> 8B45 F8 mov eax,[local.2]
004097E4 |. 8B55 08 mov edx,[arg.1]
004097E7 |. 5E pop esi
004097E8 |. 5F pop edi
004097E9 |. C60410 00 mov byte ptr ds:[eax+edx],0x0
004097ED |. 5B pop ebx
004097EE |. 8BE5 mov esp,ebp
004097F0 |. 5D pop ebp
004097F1 |. C3 retn
004097F2 |> 5E pop esi
004097F3 |. 5F pop edi
004097F4 |. 33C0 xor eax,eax
004097F6 |. 5B pop ebx
004097F7 |. 8BE5 mov esp,ebp
004097F9 |. 5D pop ebp
004097FA |. C3 retn
004097FB |> 5F pop edi
004097FC |. 33C0 xor eax,eax
004097FE |. 5B pop ebx
004097FF |. 8BE5 mov esp,ebp
00409801 |. 5D pop ebp
00409802 \. C3 retn
我要举报
如以上问答信息为低俗、色情、不良、暴力、侵权、涉及违法等信息，可以点下面链接进行举报！
大家都在看
推荐资讯