算法浅探——OpenCanvas V2.24 汉化版 -pc6资讯

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算法浅探——OpenCanvas V2.24 汉化版 时间：2004/10/15 0:52:00来源：本站整理作者：蓝点我要评论(0): 　

下载页面： http://www.skycn.com/soft/11835.html
软件大小： 1394 KB
软件语言：简体中文
软件类别：汉化补丁 / 共享版 / 图像处理
应用平台： Win9x/NT/2000/XP
加入时间： 2003-04-24 10:55:33
下载次数： 376
推荐等级： ****
开发商： http://poo.webfeng.net/poobbs/

【软件简介】：OpenCanvas 让使用者在使用电脑绘图时，就像是在纸上手绘一样，可以画出极为细致的图形。

【软件限制】：NAG、功能限制。

【作者声明】：初学Crack，只是感兴趣，没有其它目的。失误之处敬请诸位大侠赐教！

【破解工具】：TRW2000娃娃修改版、Ollydbg1.09、PEiD、W32Dasm 9.0白金版

—————————————————————————————————
【过程】：

从天空下载的笨鸡汉化的中文版。
oC224e.exe 无壳，可能让汉化者代脱了。Delphi 编写。
算法不太难，只是太麻烦了。幸好作者没有再来几个循环互相校验。

试炼码：12345678-ABCD-EFGHIJKL
—————————————————————————————————
:004AD817 E8BCD6FBFF call 0046AED8
:004AD81C 8D55E0 lea edx, dword ptr [ebp-20]
:004AD81F 8B83DC020000 mov eax, dword ptr [ebx+000002DC]
:004AD825 E8522DF8FF call 0043057C
:004AD82A 8B45E0 mov eax, dword ptr [ebp-20]
====>EAX=12345678-ABCD-EFGHIJKL

:004AD82D E8EE65F5FF call 00403E20
====>取试炼码长度

:004AD832 BA16000000 mov edx, 00000016
====>EDX=16（H）=22（D）

:004AD837 E86836F7FF call 00420EA4
====>比较试炼码是否是22位？

:004AD83C 50 push eax
:004AD83D 8D55DC lea edx, dword ptr [ebp-24]
:004AD840 8B83DC020000 mov eax, dword ptr [ebx+000002DC]
:004AD846 E8312DF8FF call 0043057C
:004AD84B 8B45DC mov eax, dword ptr [ebp-24]
:004AD84E E89167F5FF call 00403FE4
:004AD853 8BD0 mov edx, eax
:004AD855 8BC6 mov eax, esi
:004AD857 59 pop ecx
:004AD858 E8D3D6FBFF call 0046AF30
:004AD85D 8BC6 mov eax, esi
====>EAX=12345678-ABCD-EFGHIJKL

:004AD85F E8E0740400 call 004F4D44
====>关键CALL 一！进入！

:004AD864 8983E0020000 mov dword ptr [ebx+000002E0], eax
====>上面的CALL里运算，正确则EAX返回1或3。
====>否则后面004AD893处会让你大叫的。^Q^^Q^

:004AD86A 83BBE0020000FF cmp dword ptr [ebx+000002E0], FFFFFFFF
:004AD871 744C je 004AD8BF
====>跳则OVER！

:004AD873 8D45FE lea eax, dword ptr [ebp-02]
:004AD876 50 push eax
:004AD877 8D45FF lea eax, dword ptr [ebp-01]
:004AD87A 50 push eax
:004AD87B 56 push esi
:004AD87C E8D67E0400 call 004F5757
====>关键CALL 二！进入！

:004AD881 83C40C add esp, 0000000C
:004AD884 84C0 test al, al
:004AD886 7437 je 004AD8BF
====>跳则OVER！

:004AD888 56 push esi
:004AD889 E86B7F0400 call 004F57F9
====>关键CALL 三！进入！

:004AD88E 59 pop ecx
:004AD88F 84C0 test al, al
:004AD891 742C je 004AD8BF
====>跳则OVER！

:004AD893 8B83E0020000 mov eax, dword ptr [ebx+000002E0]
====>此处就是检查你4AD85F里的选择了，如果你进了陷阱……

:004AD899 83F801 cmp eax, 00000001
====>[ebx+000002E0]是否是1？呵呵，我的是。

:004AD89C 7415 je 004AD8B3
====>跳！我的选择！

:004AD89E 83F803 cmp eax, 00000003
====>[ebx+000002E0]是否是3？另个选择！

:004AD8A1 7410 je 004AD8B3
====>此处再不跳就OVER！

:004AD8A3 33C9 xor ecx, ecx
:004AD8A5 33D2 xor edx, edx

* Possible StringData Ref from Code Obj ->"Region code mismatch!"
====>很让人难受的一句话！*o* *o*

:004AD8A7 B82CD94A00 mov eax, 004AD92C
:004AD8AC E82F6D0500 call 005045E0
:004AD8B1 EB40 jmp 004AD8F3

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004AD89C(C), :004AD8A1(C)
|
:004AD8B3 C7833402000001000000 mov dword ptr [ebx+00000234], 00000001
:004AD8BD EB34 jmp 004AD8F3

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004AD871(C), :004AD886(C), :004AD891(C)
|
:004AD8BF FF83E4020000 inc dword ptr [ebx+000002E4]
:004AD8C5 8D55D8 lea edx, dword ptr [ebp-28]

* Possible StringData Ref from Code Obj ->"预P"
|
:004AD8C8 A14C995000 mov eax, dword ptr [0050994C]
:004AD8CD E8C27FF5FF call 00405894
:004AD8D2 8B45D8 mov eax, dword ptr [ebp-28]
:004AD8D5 33C9 xor ecx, ecx
:004AD8D7 33D2 xor edx, edx
:004AD8D9 E8026D0500 call 005045E0
:004AD8DE 8BC3 mov eax, ebx
:004AD8E0 E8F7FEFFFF call 004AD7DC
:004AD8E5 84C0 test al, al
:004AD8E7 740A je 004AD8F3
:004AD8E9 C7833402000002000000 mov dword ptr [ebx+00000234], 00000002

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004AD8B1(U), :004AD8BD(U), :004AD8E7(C)
|
:004AD8F3 33C0 xor eax, eax
:004AD8F5 5A pop edx
:004AD8F6 59 pop ecx
:004AD8F7 59 pop ecx
:004AD8F8 648910 mov dword ptr fs:[eax], edx
:004AD8FB 681DD94A00 push 004AD91D

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004AD91B(U)
|
:004AD900 8D45D8 lea eax, dword ptr [ebp-28]
:004AD903 E89862F5FF call 00403BA0
:004AD908 8D45DC lea eax, dword ptr [ebp-24]
:004AD90B BA02000000 mov edx, 00000002
:004AD910 E8AF62F5FF call 00403BC4
:004AD915 C3 ret

这些代码用了我一个下午的时间来分析，一个晚上的时间来整理呀。
哎，毅力和细心真的很重要。虽然我很菜，但或许勤能补拙呀。^O^^O^

—————————————————————————————————

●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●
关键CALL一开始

进入关键CALL：004AD85F call 004F4D44

* Referenced by a CALL at Addresses:
|:004AD85F , :004ADDA2 , :004C5D56 , :004C77B2 , :004C77FA
|:004D2794 , :004D30BC , :004D3469 , :004D493F , :004D4BDA
|:004D4E7D
|
:004F4D44 53 push ebx
:004F4D45 8BD8 mov ebx, eax
:004F4D47 53 push ebx
:004F4D48 E894070000 call 004F54E1
====>呵呵，陷阱呀！

:004F4D4D 59 pop ecx
:004F4D4E 84C0 test al, al
:004F4D50 7404 je 004F4D56
:004F4D52 33C0 xor eax, eax
:004F4D54 5B pop ebx
:004F4D55 C3 ret

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004F4D50(C)
|
:004F4D56 53 push ebx
:004F4D57 E8A2070000 call 004F54FE
====>关键CALL！①进入！

:004F4D5C 59 pop ecx
:004F4D5D 84C0 test al, al
:004F4D5F 7407 je 004F4D68
====>跳则进行其它可能的注册码组合比较！

:004F4D61 B801000000 mov eax, 00000001
====>我以第二个组合为目的，所以需要此处置1！

:004F4D66 EB39 jmp 004F4DA1

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004F4D5F(C)
|
:004F4D68 53 push ebx
:004F4D69 E8AD070000 call 004F551B
====>呵呵，陷阱呀！

:004F4D6E 59 pop ecx
:004F4D6F 84C0 test al, al
:004F4D71 7407 je 004F4D7A
:004F4D73 B802000000 mov eax, 00000002
:004F4D78 EB27 jmp 004F4DA1

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004F4D71(C)
|
:004F4D7A 53 push ebx
:004F4D7B E8B8070000 call 004F5538
====>呵呵，还有这个可以用。

:004F4D80 59 pop ecx
:004F4D81 84C0 test al, al
:004F4D83 7407 je 004F4D8C
:004F4D85 B803000000 mov eax, 00000003
:004F4D8A EB15 jmp 004F4DA1

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004F4D83(C)
|
:004F4D8C 53 push ebx
:004F4D8D E8C3070000 call 004F5555
====>呵呵，陷阱呀！

:004F4D92 59 pop ecx
:004F4D93 84C0 test al, al
:004F4D95 7407 je 004F4D9E
:004F4D97 B804000000 mov eax, 00000004
:004F4D9C EB03 jmp 004F4DA1

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004F4D39(C), :004F4D95(C)
|
:004F4D9E 83C8FF or eax, FFFFFFFF

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004F4D66(U), :004F4D78(U), :004F4D8A(U), :004F4D9C(U)
|
:004F4DA1 5B pop ebx
:004F4DA2 C3 ret

—————————————————————————————————
进入关键CALL①：004F4D57 call 004F54FE

* Referenced by a CALL at Address:
|:004F4D57
|
:004F54FE 8B442404 mov eax, dword ptr [esp+04]
====>EAX=12345678-ABCD-EFGHIJKL 试炼码

:004F5502 80780145 cmp byte ptr [eax+01], 45
====>试炼码第2位是否是E？

:004F5506 7510 jne 004F5518
:004F5508 80780331 cmp byte ptr [eax+03], 31
====>试炼码第4位是否是1？

:004F550C 750A jne 004F5518
:004F550E 50 push eax
:004F550F E872FFFFFF call 004F5486
====>关键CALL！②进入！

:004F5514 83C404 add esp, 00000004
:004F5517 C3 ret

我的试炼码12345678-ABCD-EFGHIJKL调整为：1E315678-ABCD-EFGHIJKL

—————————————————————————————————
进入关键CALL②：004F550F call 004F5486

* Referenced by a CALL at Addresses:
|:004F54F2 , :004F550F , :004F552C , :004F5549 , :004F5566
|
:004F5486 56 push esi
:004F5487 8B742408 mov esi, dword ptr [esp+08]
:004F548B B02D mov al, 2D
====>AL=2D 即：-

:004F548D 384608 cmp byte ptr [esi+08], al
====>试炼码第9位是否是-

:004F5490 754B jne 004F54DD
====>跳则OVER！

:004F5492 38460D cmp byte ptr [esi+0D], al
====>试炼码第14位是否是-

:004F5495 7546 jne 004F54DD
====>跳则OVER！

:004F5497 0FBE06 movsx eax, byte ptr [esi]
====>取试炼码第1位字符的HEX值

:004F549A 83F841 cmp eax, 00000041
====>第1位不能小于41

:004F549D 7C3E jl 004F54DD
====>跳则OVER！

:004F549F 83F85A cmp eax, 0000005A
====>第1位不能大于5A 即：第1位须是大写字母。

:004F54A2 7F39 jg 004F54DD
====>跳则OVER！

:004F54A4 0FBE4609 movsx eax, byte ptr [esi+09]
====>取试炼码第10位字符的HEX值

:004F54A8 83F841 cmp eax, 00000041
:004F54AB 7C30 jl 004F54DD
:004F54AD 83F85A cmp eax, 0000005A
:004F54B0 7F2B jg 004F54DD
====>同上面一样，第10位应是大写字母！

:004F54B2 0FBE460F movsx eax, byte ptr [esi+0F]
====>取试炼码第16位字符的HEX值

:004F54B6 83F841 cmp eax, 00000041
:004F54B9 7C22 jl 004F54DD
:004F54BB 83F85A cmp eax, 0000005A
:004F54BE 7F1D jg 004F54DD
====>同上面一样，第16位应是大写字母！

所以，第1、10、16位必须是大写字母！
我的试炼码12345678-ABCD-EFGHIJKL调整为：AE315678-ABCD-EFGHIJKL

:004F54C0 56 push esi
:004F54C1 E84CFFFFFF call 004F5412
====>关键CALL③！进入！

:004F54C6 0FBE4E15 movsx ecx, byte ptr [esi+15]
====>取试炼码第22位字符的HEX值4C

:004F54CA 25FF000000 and eax, 000000FF
:004F54CF 83C404 add esp, 00000004
:004F54D2 33D2 xor edx, edx
:004F54D4 3BC8 cmp ecx, eax
====>ECX=4C 试炼码第22位字符的HEX值
====>EAX=34 上面4F54C1处运算得出的值
====>所以注册码的第22位应是4

因此把试炼码AE315678-ABCD-EFGHIJKL再次修改为AE315678-ABCD-EFGHIJK4
当然，我只是在Ollydbg中修改了寄存器的值，不用再重新LOAD，那样太麻烦了。^O^^O^

:004F54D6 0F94C2 sete dl
====>根据比较结果设置DL的值应为TRUE 即：01

:004F54D9 8AC2 mov al, dl
:004F54DB 5E pop esi
:004F54DC C3 ret

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004F5490(C), :004F5495(C), :004F549D(C), :004F54A2(C), :004F54AB(C)
|:004F54B0(C), :004F54B9(C), :004F54BE(C)
|
:004F54DD 32C0 xor al, al
====>跳到此处清0就OVER了！

:004F54DF 5E pop esi
:004F54E0 C3 ret

—————————————————————————————————
进入关键CALL③：004F54C1 call 004F5412

* Referenced by a CALL at Address:
|:004F54C1
|
:004F5412 8B442404 mov eax, dword ptr [esp+04]
====>EAX=AE315678-ABCD-EFGHIJKL 试炼码

:004F5416 8A480F mov cl, byte ptr [eax+0F]
====>CL=46 取试炼码第16位字符的HEX值

:004F5419 8A5009 mov dl, byte ptr [eax+09]
====>DL=41 取试炼码第10位字符的HEX值

:004F541C 8A00 mov al, byte ptr [eax]
====>AL=41 取试炼码第1 位字符的HEX值

:004F541E 03CA add ecx, edx
====>ECX=46 + 41=00DACE87

:004F5420 8D4C01FC lea ecx, dword ptr [ecx+eax-04]
====>ECX=00DACE87 + 0082F131 - 04=015DBFB4

:004F5424 83E10F and ecx, 0000000F
====>ECX=015DBFB4 AND 0000000F=4

:004F5427 8A8144905000 mov al, byte ptr [ecx+00509044]
====>根据ECX值从[00509044]的表中取值！
====>AL=34 将和试炼码的第22位比较！
☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆
[00509044]内存中是一张表：

00509044 30 31 32 33 34 35 36 37 38 39 41 42 43 44 45 46 0123456789ABCDEF
☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆

:004F542D C3 ret

小结：第1、10、16位字母的HEX值的低位相加再减4，以此为指针从[00509044]内存中的表中取值
1+2+6-4=4 [00509044 + 4]处是34，34和第22位比较，所以第22位是 4

关键CALL一结束
●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●

□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□
关键CALL二开始

* Referenced by a CALL at Addresses:
|:004AD87C , :004ADE71 , :004C5E25 , :004C77C5 , :004C7812
|:004D2863 , :004D318B , :004D3538 , :004D4A0E , :004D4CA9
|:004D4F4C
|
:004F5757 53 push ebx
:004F5758 56 push esi
:004F5759 8B74240C mov esi, dword ptr [esp+0C]
====>ESI=AE315678-ABCD-EFGHIJK4 试炼码

:004F575D 0FBE460C movsx eax, byte ptr [esi+0C]
====>EAX=44 取试炼码第13位字符的HEX值

:004F5761 83F830 cmp eax, 00000030
:004F5764 7C0A jl 004F5770
:004F5766 83F839 cmp eax, 00000039
:004F5769 7F05 jg 004F5770
:004F576B 83C0D0 add eax, FFFFFFD0
====>如果第13位字符是数字则此处-30

:004F576E EB0D jmp 004F577D

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004F5764(C), :004F5769(C)
|
:004F5770 83F841 cmp eax, 00000041
:004F5773 7C7F jl 004F57F4
:004F5775 83F85A cmp eax, 0000005A
:004F5778 7F7A jg 004F57F4
:004F577A 83C0C9 add eax, FFFFFFC9
====>如果第13位字符是字母则此处-37
====>EAX=44 - 37=D

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004F576E(U)
|
:004F577D 8944240C mov dword ptr [esp+0C], eax
====>[esp+0C]=EAX

:004F5781 0FBE4612 movsx eax, byte ptr [esi+12]
====>EAX=49 取试炼码第19位字符的HEX值

:004F5785 83F830 cmp eax, 00000030
:004F5788 7C0A jl 004F5794
:004F578A 83F839 cmp eax, 00000039
:004F578D 7F05 jg 004F5794
:004F578F 8D58D0 lea ebx, dword ptr [eax-30]
====>如果第19位字符是数字则此处-30

:004F5792 EB0D jmp 004F57A1

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004F5788(C), :004F578D(C)
|
:004F5794 83F841 cmp eax, 00000041
:004F5797 7C5B jl 004F57F4
:004F5799 83F85A cmp eax, 0000005A
:004F579C 7F56 jg 004F57F4
:004F579E 8D58C9 lea ebx, dword ptr [eax-37]
====>如果第19位字符是字母则此处-37
====>EBX=49 - 37=12

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004F5792(U)
|
:004F57A1 56 push esi
:004F57A2 E8B3FCFFFF call 004F545A
====>关键CALL！④进入！

:004F57A7 0FBE4E14 movsx ecx, byte ptr [esi+14]
====>ECX=4B 取试炼码第21位字符的HEX值

:004F57AB 25FF000000 and eax, 000000FF
:004F57B0 83C404 add esp, 00000004
:004F57B3 3BC8 cmp ecx, eax
====>ECX=4B 试炼码第21位字符的HEX值
====>EAX=44 上面4F54C1处运算得出的值
====>所以注册码的第21位应是D
因此把试炼码AE315678-ABCD-EFGHIJK4再次修改为AE315678-ABCD-EFGHIJD4

:004F57B5 753D jne 004F57F4
:004F57B7 8B44240C mov eax, dword ptr [esp+0C]
====>EAX=0D 取试炼码第21位字符的HEX值

:004F57BB 83C341 add ebx, 00000041
====>EBX=12 + 41=53

:004F57BE 83C041 add eax, 00000041
====>EAX=0D + 41=4E

:004F57C1 50 push eax
:004F57C2 89442410 mov dword ptr [esp+10], eax
:004F57C6 E8DBFBFFFF call 004F53A6
====>CALL⑤！进入！

:004F57CB 83C404 add esp, 00000004
:004F57CE 84C0 test al, al
:004F57D0 7422 je 004F57F4
:004F57D2 53 push ebx
:004F57D3 E8CEFBFFFF call 004F53A6
====>CALL⑥！进入！

:004F57D8 83C404 add esp, 00000004
:004F57DB 84C0 test al, al
:004F57DD 7415 je 004F57F4
:004F57DF 8B542410 mov edx, dword ptr [esp+10]
:004F57E3 8A44240C mov al, byte ptr [esp+0C]
====>AL=4E

:004F57E7 8B4C2414 mov ecx, dword ptr [esp+14]
:004F57EB 5E pop esi
:004F57EC 8802 mov byte ptr [edx], al
:004F57EE B001 mov al, 01
:004F57F0 8819 mov byte ptr [ecx], bl
====>[ECX]=BL=53

:004F57F2 5B pop ebx
:004F57F3 C3 ret

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004F5773(C), :004F5778(C), :004F5797(C), :004F579C(C), :004F57B5(C)
|:004F57D0(C), :004F57DD(C)
|
:004F57F4 5E pop esi
:004F57F5 32C0 xor al, al
:004F57F7 5B pop ebx
:004F57F8 C3 ret

—————————————————————————————————
进入关键CALL④：004F57A2 call 004F545A

* Referenced by a CALL at Address:
|:004F57A2
|
:004F545A 8B442404 mov eax, dword ptr [esp+04]
====>EAX=AE315678-ABCD-EFGHIJK4 试炼码

:004F545E 8A4812 mov cl, byte ptr [eax+12]
====>CL=49 取试炼码第19位字符的HEX值

:004F5461 8A500C mov dl, byte ptr [eax+0C]
====>DL=44 取试炼码第13位字符的HEX值

:004F5464 03CA add ecx, edx
====>ECX=0082F149 + 00000044=0082F18D

:004F5466 83E10F and ecx, 0000000F
====>ECX=0082F18D AND 0000000F=D

:004F5469 8A8144905000 mov al, byte ptr [ecx+00509044]
====>根据ECX值从[00509044]的表中取值！
====>AL=44 将和试炼码的第21位比较！
☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆
[00509044]内存中是一张表：

00509044 30 31 32 33 34 35 36 37 38 39 41 42 43 44 45 46 0123456789ABCDEF
☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆

:004F546F C3 ret

小结：取第13、19位试炼码的HEX值，同上进行低位相加，再从表中取值。
4+9=D [00509044 + D]处是44，44和第21位比较，所以第21位是 D

—————————————————————————————————
两次进入CALL⑤、⑥：004F57C6 call 004F53A6

* Referenced by a CALL at Addresses:
|:004F57C6 , :004F57D3
|
:004F53A6 8B442404 mov eax, dword ptr [esp+04]
====>EAX=4E
====>EAX=53

:004F53AA 25FF000000 and eax, 000000FF
:004F53AF 83F841 cmp eax, 00000041
:004F53B2 7C05 jl 004F53B9
:004F53B4 83F85A cmp eax, 0000005A
:004F53B7 7E0D jle 004F53C6

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004F53B2(C)
|
:004F53B9 83F861 cmp eax, 00000061
:004F53BC 7C05 jl 004F53C3
:004F53BE 83F87A cmp eax, 0000007A
:004F53C1 7E03 jle 004F53C6

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004F53BC(C)
|
:004F53C3 32C0 xor al, al
:004F53C5 C3 ret

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004F53B7(C), :004F53C1(C)
|
:004F53C6 83F841 cmp eax, 00000041
:004F53C9 7C0F jl 004F53DA
:004F53CB 83F85A cmp eax, 0000005A
:004F53CE 7F0A jg 004F53DA
:004F53D0 83C0BF add eax, FFFFFFBF
====>EAX=4E - 41=D
====>EAX=53 - 41=12

:004F53D3 8A8028905000 mov al, byte ptr [eax+00509028]
====>根据EAX值从[00509028]的表中取值！
====>AL=01
====>AL=01

☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆
[00509028]内存中是一张表：

00509028 01 01 00 01 01 01 01 01 01 01 01 00 01 01 01 01
☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆

:004F53D9 C3 ret

这2次取值运算的作用不太清楚，可能是检测第13位、19位的字符有没有踩上程序预埋的“地雷”吧？
因为此处内存中有的值是00，如果你很走运就碰上此处的话，恭喜你：“Game Over”了！~@~~@~

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004F53C9(C), :004F53CE(C)
|
:004F53DA 83C09F add eax, FFFFFF9F
:004F53DD 8A8028905000 mov al, byte ptr [eax+00509028]
:004F53E3 C3 ret

关键CALL二结束
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◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆
关键CALL三开始

进入关键CALL：004AD889 call 004F57F9

* Referenced by a CALL at Addresses:
|:004AD889 , :004ADE7F , :004C5E33 , :004C77D2 , :004C781F
|:004D2871 , :004D3199 , :004D3546 , :004D4A1C , :004D4CB7
|:004D4F5A
|
:004F57F9 53 push ebx
:004F57FA 56 push esi
:004F57FB 57 push edi
:004F57FC 8B7C2410 mov edi, dword ptr [esp+10]
====>EDI=AE315678-ABCD-EFGHIJD4
因为在下面的运算中第7位和第12位必须满足几个条件，所以分析了几遍后把第7位改为4，第12位改为3
AE315678-ABCD-EFGHIJD4 改为 AE315648-AB3D-EFGHIJD4

:004F5800 0FBE4706 movsx eax, byte ptr [edi+06]
====>EAX=34 取试炼码第7位字符的HEX值

:004F5804 83F830 cmp eax, 00000030
:004F5807 7C0A jl 004F5813
:004F5809 83F839 cmp eax, 00000039
:004F580C 7F05 jg 004F5813
:004F580E 8D58D0 lea ebx, dword ptr [eax-30]
====>如果第7位字符是数字则此处-30
====>EBX=34 - 30=4

:004F5811 EB15 jmp 004F5828

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004F5807(C), :004F580C(C)
|
:004F5813 83F841 cmp eax, 00000041
:004F5816 0F8C92000000 jl 004F58AE
:004F581C 83F846 cmp eax, 00000046
:004F581F 0F8F89000000 jg 004F58AE
:004F5825 8D58C9 lea ebx, dword ptr [eax-37]

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004F5811(U)
|
:004F5828 0FBE470B movsx eax, byte ptr [edi+0B]
====>EAX=33 取试炼码第12位字符的HEX值

:004F582C 83F830 cmp eax, 00000030
:004F582F 7C0A jl 004F583B
:004F5831 83F839 cmp eax, 00000039
:004F5834 7F05 jg 004F583B
:004F5836 8D70D0 lea esi, dword ptr [eax-30]
====>如果第12位字符是数字则此处-30
====>ESI=33 - 30=3

:004F5839 EB0D jmp 004F5848

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004F582F(C), :004F5834(C)
|
:004F583B 83F841 cmp eax, 00000041
:004F583E 7C6E jl 004F58AE
:004F5840 83F846 cmp eax, 00000046
:004F5843 7F69 jg 004F58AE
:004F5845 8D70C9 lea esi, dword ptr [eax-37]

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004F5839(U)
|
:004F5848 57 push edi
:004F5849 E822FCFFFF call 004F5470
====>关键CALL！⑦进入！

:004F584E 0FBE4F13 movsx ecx, byte ptr [edi+13]
====>ECX=4A 取试炼码第20位字符的HEX值

:004F5852 25FF000000 and eax, 000000FF
:004F5857 83C404 add esp, 00000004
:004F585A 3BC8 cmp ecx, eax
====>ECX=4A 试炼码第22位字符的HEX值
====>EAX=37 上面4F5849处运算得出的值
====>所以注册码的第20位应是7
因此把试炼码AE315648-AB3D-EFGHIJD4再次修改为AE315648-AB3D-EFGHI7D4
好了，GAME OVER！不，是终于成功了！！^O^^O^^O^^O^

:004F585C 7550 jne 004F58AE
:004F585E C1E604 shl esi, 04
====>ESI=3 SHL 4=30

:004F5861 03F3 add esi, ebx
====>ESI=30 + 4=34

:004F5863 B90D000000 mov ecx, 0000000D
====>ECX=D

:004F5868 8BC6 mov eax, esi
:004F586A 99 cdq
:004F586B F7F9 idiv ecx
====>EDX=34 % D=0

:004F586D 85D2 test edx, edx
====>余数是否为0？此处余数必须为0！

:004F586F 753D jne 004F58AE
====>跳则OVER！

:004F5871 B84FECC44E mov eax, 4EC4EC4F
:004F5876 F7EE imul esi
:004F5878 C1FA02 sar edx, 02
:004F587B 8BC2 mov eax, edx
:004F587D C1E81F shr eax, 1F
:004F5880 03D0 add edx, eax
:004F5882 83FA03 cmp edx, 00000003
:004F5885 7C17 jl 004F589E
:004F5887 83FA09 cmp edx, 00000009
:004F588A 7F12 jg 004F589E
:004F588C B801000000 mov eax, 00000001
:004F5891 33C9 xor ecx, ecx
:004F5893 3BC0 cmp eax, eax
:004F5895 5F pop edi
:004F5896 0F94C1 sete cl
:004F5899 5E pop esi
:004F589A 8AC1 mov al, cl
:004F589C 5B pop ebx
:004F589D C3 ret

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004F5885(C), :004F588A(C)
|
:004F589E 33C0 xor eax, eax
:004F58A0 33C9 xor ecx, ecx
:004F58A2 83F801 cmp eax, 00000001
:004F58A5 5F pop edi
:004F58A6 0F94C1 sete cl
:004F58A9 5E pop esi
:004F58AA 8AC1 mov al, cl
:004F58AC 5B pop ebx
:004F58AD C3 ret

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004F5816(C), :004F581F(C), :004F583E(C), :004F5843(C), :004F585C(C)
|:004F586F(C)
|
:004F58AE 5F pop edi
:004F58AF 5E pop esi
:004F58B0 32C0 xor al, al
:004F58B2 5B pop ebx
:004F58B3 C3 ret

—————————————————————————————————
进入关键CALL⑦：004F5849 call 004F5470

* Referenced by a CALL at Address:
|:004F5849
|
:004F5470 8B442404 mov eax, dword ptr [esp+04]
====>EAX=AE315648-AB3D-EFGHIJD4

:004F5474 8A480B mov cl, byte ptr [eax+0B]
====>CL=33 取试炼码第12位字符的HEX值

:004F5477 8A5006 mov dl, byte ptr [eax+06]
====>DL=34 取试炼码第7位字符的HEX值

:004F547A 03CA add ecx, edx
====>ECX=0082F133 + 0082F134=0105E267

:004F547C 83E10F and ecx, 0000000F
====>ECX=0105E267 AND 0000000F=7

:004F547F 8A8144905000 mov al, byte ptr [ecx+00509044]
====>根据ECX值从[00509044]的表中取值！
====>AL=37 将和试炼码的第20位比较！
☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆
[00509044]内存中是一张表：

00509044 30 31 32 33 34 35 36 37 38 39 41 42 43 44 45 46 0123456789ABCDEF
☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆

:004F5485 C3 ret

小结：取第12、7位试炼码的HEX值，同上进行低位相加，再从表中取值。
3+4=7 [00509044 + 7]处是37，37和第20位比较，所以第20位是 7

关键CALL三结束
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—————————————————————————————————
【算法总结】：

实在是快在里面转晕了。简单理顺一下吧，说不明白的地方请多多指教。

一、注册码需要22位。第9、14位固定为-

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