迷你日历 V2.2 算法分析

算法分析——迷你日历 V2.2(MiniCalendar)

下载地址： http://www.skycn.com/soft/9249.html

软件大小： 814 KB

软件语言： 简体中文

软件类别： 国产软件 / 共享版 / 时钟日历

应用平台： Win9x/NT/2000/XP

加入时间： 2003-02-07 11:06:35

下载次数： 15122

推荐等级： * * *

开 发 商： http://asp2.6to23.com/gar/

【软件简介】：迷你日历是集公历农历(1901-2099年)双界面对照查询、记事栏、记事查询、重要记事动态提醒、自定义节日、节日预告、日历打印和多种日历信息(节气、节日、九九、三伏、生肖、时辰等)查询于一身的多功能日历软件。其具体特点简述如下：1.公历、农历双界面：可按照以公历为主或以农历为主的两种界面显示日历，两种界面可随意切换，在任一界面中均可进行农历和公历的对照查询，这对以农历为主计算日期的人们来说尤为方便。2.记事栏、记事查询：软件为每一日期安排有记事栏，你可以将日程安排或备忘等写入记事栏；当日久天长记事很多时，可利用记事查询功能方便地找到以往的记事。3.重要记事动态提醒：可将你认为重要的记事定义为动态提醒记事，这样软件会定时动态地在屏幕上用醒目的游动提醒窗显示重要记事，并伴有铃声及动画提醒。4.界面配置魔术师：能满足不同网友的个人爱好，可随意改变界面不同区域的色彩、字体、换肤、贴图等等，定制出变化无穷、丰富多采的日历界面。5.自定义节日：可将你喜欢的节日或你的生日定义到日历当中，使日历更具个性化。6.节日预告：可分别对各类节日进行预告，这将更加方便你对节日的安排。7.打印日历：可打印任意尺寸、独具特色的精美日历。

【软件限制】：功能限制

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

【破解工具】：TRW2000娃娃修改版、W32Dasm8.93黄金版、Ollydbg1.09

—————————————————————————————

【过 程】：

准备好一杯浓茶、一盒烟、一支笔、一本草稿纸、一颗安静的心……

呵呵，我们开工吧！唉！^-^^-^ 我的水平很低，许多地方表达的有问题，烦请各位老师指教！

机器码：A8F4W303XY

试炼码：BCDEFGHIJKSTUVWXCDEF

（试炼码须20位，且有限制。单是试炼码就不太好填^-^）

程序无壳，Delphi编写。反汇编。还好，重要提示都在。

——————————————————————————————

:004A8F86 E8FD0BFAFF call 00449B88

:004A8F8B 8B45F0 mov eax, dword ptr [ebp-10]

:004A8F8E 8D55F4 lea edx, dword ptr [ebp-0C]

:004A8F91 E8CAF8FEFF call 00498860

:004A8F96 8B45F4 mov eax, dword ptr [ebp-0C]

:004A8F99 8D55F8 lea edx, dword ptr [ebp-08]

:004A8F9C E8DB00F6FF call 0040907C

:004A8FA1 8B45F8 mov eax, dword ptr [ebp-08]

:004A8FA4 E897BEF5FF call 00404E40

:004A8FA9 83F814 cmp eax, 00000014

====>试炼码是否20位？

:004A8FAC 741D je 004A8FCB

====>应跳！

:004A8FAE 6A00 push 00000000

:004A8FB0 B914914A00 mov ecx, 004A9114

* Possible StringData Ref from Code Obj ->"注册码输入长度非法 ！"

|

:004A8FB5 BA20914A00 mov edx, 004A9120

:004A8FBA A194314F00 mov eax, dword ptr [004F3194]

:004A8FBF 8B00 mov eax, dword ptr [eax]

:004A8FC1 E8360EFCFF call 00469DFC

:004A8FC6 E90C010000 jmp 004A90D7

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:004A8FAC(C)

|

:004A8FCB 33FF xor edi, edi

:004A8FCD B801000000 mov eax, 00000001

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:004A8FF9(C)

下面是检查输入的注册码是否在BCDEFGHIJKSTUVWX之中，如不在，则为“非法字符”！

:004A8FD2 8B55F8 mov edx, dword ptr [ebp-08]

:004A8FD5 8A5402FF mov dl, byte ptr [edx+eax-01]

:004A8FD9 8BCA mov ecx, edx

:004A8FDB 80C1BE add cl, BE

:004A8FDE 80E90A sub cl, 0A

:004A8FE1 7212 jb 004A8FF5

:004A8FE3 8B4DF8 mov ecx, dword ptr [ebp-08]

:004A8FE6 80C2AD add dl, AD

:004A8FE9 80EA06 sub dl, 06

:004A8FEC 7207 jb 004A8FF5

:004A8FEE BF01000000 mov edi, 00000001

:004A8FF3 EB06 jmp 004A8FFB

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:

|:004A8FE1(C), :004A8FEC(C)

|

:004A8FF5 40 inc eax

:004A8FF6 83F815 cmp eax, 00000015

:004A8FF9 75D7 jne 004A8FD2

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:004A8FF3(U)

|

:004A8FFB 4F dec edi

:004A8FFC 751D jne 004A901B

====>应跳！

:004A8FFE 6A00 push 00000000

:004A9000 B914914A00 mov ecx, 004A9114

* Possible StringData Ref from Code Obj ->"注册码中输入了非法字符 ！"

|

:004A9005 BA38914A00 mov edx, 004A9138

:004A900A A194314F00 mov eax, dword ptr [004F3194]

:004A900F 8B00 mov eax, dword ptr [eax]

:004A9011 E8E60DFCFF call 00469DFC

:004A9016 E9BC000000 jmp 004A90D7

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:004A8FFC(C)

|

:004A901B 8D45EC lea eax, dword ptr [ebp-14]

:004A901E E88102FFFF call 004992A4

:004A9023 8B45EC mov eax, dword ptr [ebp-14]

:004A9026 50 push eax

:004A9027 8D55E8 lea edx, dword ptr [ebp-18]

:004A902A 8B45F8 mov eax, dword ptr [ebp-08]

:004A902D E8B2EEFEFF call 00497EE4

====>关键CALL！F8进入！

:004A9032 8B55E8 mov edx, dword ptr [ebp-18]

====>D EDX=1BDAC2999555E7B2EBB6

:004A9035 58 pop eax

====>D EAX=A8F4W303XY

:004A9036 E849BFF5FF call 00404F84

====>比较CALL！F8进入！

:004A903B 756E jne 004A90AB

====>跳则OVER！

:004A903D 8B45F8 mov eax, dword ptr [ebp-08]

:004A9040 E807ECFEFF call 00497C4C

:004A9045 A1DC304F00 mov eax, dword ptr [004F30DC]

:004A904A C70001000000 mov dword ptr [eax], 00000001

:004A9050 A1F42E4F00 mov eax, dword ptr [004F2EF4]

:004A9055 C70001000000 mov dword ptr [eax], 00000001

:004A905B A16C2F4F00 mov eax, dword ptr [004F2F6C]

:004A9060 C70001000000 mov dword ptr [eax], 00000001

:004A9066 A1842C4F00 mov eax, dword ptr [004F2C84]

:004A906B C70001000000 mov dword ptr [eax], 00000001

:004A9071 A1A8324F00 mov eax, dword ptr [004F32A8]

:004A9076 C70001000000 mov dword ptr [eax], 00000001

:004A907C A19C334F00 mov eax, dword ptr [004F339C]

:004A9081 C70058020000 mov dword ptr [eax], 00000258

:004A9087 6A00 push 00000000

* Possible StringData Ref from Code Obj ->"注册《迷你日历》提醒 ！！！"

|

:004A9089 B954914A00 mov ecx, 004A9154

* Possible StringData Ref from Code Obj ->"真诚地感谢您对《迷你日历》开发工作的支持 "

->"！

请注意：您现在使用的是共享免费版，功能受到"

->"限制，

只有使用我们发给您的真正共享版进行注册"

->"，才能得到全部功能。

"

->" 祝您注册顺利 ！

"

|

:004A908E BA70914A00 mov edx, 004A9170

:004A9093 A194314F00 mov eax, dword ptr [004F3194]

:004A9098 8B00 mov eax, dword ptr [eax]

:004A909A E85D0DFCFF call 00469DFC

:004A909F 8B55FC mov edx, dword ptr [ebp-04]

:004A90A2 8BC6 mov eax, esi

:004A90A4 E80BFEFFFF call 004A8EB4

:004A90A9 EB2C jmp 004A90D7

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:004A903B(C)

|

:004A90AB A1DC304F00 mov eax, dword ptr [004F30DC]

:004A90B0 33D2 xor edx, edx

:004A90B2 8910 mov dword ptr [eax], edx

:004A90B4 A19C334F00 mov eax, dword ptr [004F339C]

:004A90B9 C70006000000 mov dword ptr [eax], 00000006

:004A90BF 6A00 push 00000000

* Possible StringData Ref from Code Obj ->" 注册失败 ！"

|

:004A90C1 B934924A00 mov ecx, 004A9234

* Possible StringData Ref from Code Obj ->"注册没有通过，再试一试。"

|

:004A90C6 BA44924A00 mov edx, 004A9244

:004A90CB A194314F00 mov eax, dword ptr [004F3194]

:004A90D0 8B00 mov eax, dword ptr [eax]

:004A90D2 E8250DFCFF call 00469DFC

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:

|:004A8FC6(U), :004A9016(U), :004A90A9(U)

|

:004A90D7 33C0 xor eax, eax

--------------------------------------------------------

一、F8进入关键CALL：004A902D call 00497EE4

* Referenced by a CALL at Addresses:

|:004A902D , :004A9339 , :004ED991

|

:00497EE4 55 push ebp

:00497EE5 8BEC mov ebp, esp

:00497EE7 B906000000 mov ecx, 00000006

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:00497EF1(C)

|

:00497EEC 6A00 push 00000000

:00497EEE 6A00 push 00000000

:00497EF0 49 dec ecx

:00497EF1 75F9 jne 00497EEC

:00497EF3 51 push ecx

:00497EF4 53 push ebx

:00497EF5 56 push esi

:00497EF6 57 push edi

:00497EF7 8955F8 mov dword ptr [ebp-08], edx

:00497EFA 8945FC mov dword ptr [ebp-04], eax

:00497EFD 8B45FC mov eax, dword ptr [ebp-04]

:00497F00 E823D1F6FF call 00405028

:00497F05 33C0 xor eax, eax

:00497F07 55 push ebp

:00497F08 68FD804900 push 004980FD

:00497F0D 64FF30 push dword ptr fs:[eax]

:00497F10 648920 mov dword ptr fs:[eax], esp

:00497F13 8D55E0 lea edx, dword ptr [ebp-20]

:00497F16 8B45FC mov eax, dword ptr [ebp-04]

====>D EAX=BCDEFGHIJKSTUVWXCDEF

:00497F19 E89A11F7FF call 004090B8

====>此CALL将试炼码转成小写！

:00497F1E 8D45EC lea eax, dword ptr [ebp-14]

:00497F21 8B55E0 mov edx, dword ptr [ebp-20]

====>D EDX=bcdefghijkstuvwxcdef

:00497F24 E8F7CCF6FF call 00404C20

:00497F29 8D45F0 lea eax, dword ptr [ebp-10]

:00497F2C E857CCF6FF call 00404B88

:00497F31 BB01000000 mov ebx, 00000001

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:00497F58(C)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

1、下面循环是将上面小写字母的HEX值分别减去32，得到新的值！

:00497F36 8D45E8 lea eax, dword ptr [ebp-18]

:00497F39 8B55EC mov edx, dword ptr [ebp-14]

:00497F3C 0FB6541AFF movzx edx, byte ptr [edx+ebx-01]

====>依次取小写字母字符对应的HEX值

:00497F41 83EA32 sub edx, 00000032

====>依次减32

:00497F44 E81FCEF6FF call 00404D68

:00497F49 8D45F0 lea eax, dword ptr [ebp-10]

:00497F4C 8B55E8 mov edx, dword ptr [ebp-18]

:00497F4F E8F4CEF6FF call 00404E48

:00497F54 43 inc ebx

:00497F55 83FB15 cmp ebx, 00000015

:00497F58 75DC jne 00497F36

====>呵呵，循环吧。

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

2、将上面循环所得的HEX值转为字符！

:00497F5A 8D45EC lea eax, dword ptr [ebp-14]

:00497F5D E826CCF6FF call 00404B88

====>将上面循环所得的HEX值转为字符

:00497F62 BB01000000 mov ebx, 00000001

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:00497F95(C)

|

:00497F67 8D45E8 lea eax, dword ptr [ebp-18]

:00497F6A 8B55F0 mov edx, dword ptr [ebp-10]

====>D EDX=0123456789ABCDEF1234

====>这就是我的试炼码转化的结果！

##################################################################

3、下面循环的作用是将0123456789ABCDEF1234转化为用二进制表示！

请教一下：OllyDbg中直接执行到光标所在位置是命令是什么？(相当于TRW中的F7命令)，ALT+F9不好使。这么多的循环，我只好在循环外下断，然后CTR+F9了。否则我会累趴的。^-^

:00497F6D 8A541AFF mov dl, byte ptr [edx+ebx-01]

====>依次取新得的字符

:00497F71 E8F2CDF6FF call 00404D68

:00497F76 8D4DE4 lea ecx, dword ptr [ebp-1C]

:00497F79 BA03000000 mov edx, 00000003

:00497F7E 8B45E8 mov eax, dword ptr [ebp-18]

:00497F81 E8E2030000 call 00498368

:00497F86 8D45EC lea eax, dword ptr [ebp-14]

:00497F89 8B55E4 mov edx, dword ptr [ebp-1C]

:00497F8C E8B7CEF6FF call 00404E48

:00497F91 43 inc ebx

:00497F92 83FB15 cmp ebx, 00000015

:00497F95 75D0 jne 00497F67

====>呵呵，真不嫌累，又是循环！

循环所得的结果：

00000001001000110100010101100111100010011010101111001101111011110001001000110100

##################################################################

:00497F97 8D45F0 lea eax, dword ptr [ebp-10]

:00497F9A E8E9CBF6FF call 00404B88

:00497F9F 8D45E8 lea eax, dword ptr [ebp-18]

:00497FA2 E8E1CBF6FF call 00404B88

:00497FA7 8D45E4 lea eax, dword ptr [ebp-1C]

:00497FAA E8D9CBF6FF call 00404B88

:00497FAF BE01000000 mov esi, 00000001

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

4、按照奇、偶位次序分别交替从上面的二进制码中取数，倒序存放！

分别得出新的二进制数！

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:00497FF9(C)

:00497FB4 8BC6 mov eax, esi

:00497FB6 48 dec eax

:00497FB7 8BD8 mov ebx, eax

:00497FB9 03DB add ebx, ebx

:00497FBB 43 inc ebx

:00497FBC 8D45D8 lea eax, dword ptr [ebp-28]

:00497FBF 8B55EC mov edx, dword ptr [ebp-14]

====>D EDX=00000001001000110100

010101100111100010011010101111001101111011110001001000110100

====>这就是我的试炼码第2次转化的结果！

:00497FC2 8A541AFF mov dl, byte ptr [edx+ebx-01]

====>这从上面的二进制码按奇数位依次取数！

即：取1、3、5、7、…… ……位

:00497FC6 E89DCDF6FF call 00404D68

:00497FCB 8B55D8 mov edx, dword ptr [ebp-28]

:00497FCE 8D45E8 lea eax, dword ptr [ebp-18]

====>结果 倒序 放[ebp-18]

* * * *

:00497FD1 8B4DE8 mov ecx, dword ptr [ebp-18]

====>循环结果

ECX=0010100011110101111101011010000010100000

:00497FD4 E8B3CEF6FF call 00404E8C

:00497FD9 8D45D4 lea eax, dword ptr [ebp-2C]

:00497FDC 8B55EC mov edx, dword ptr [ebp-14]

====>D EDX=00000001001000110100

010101100111100010011010101111001101111011110001001000110100

:00497FDF 8A141A mov dl, byte ptr [edx+ebx]

====>这从上面的二进制码按偶数位依次取数！

即：取2、4、6、8、…… ……位

:00497FE2 E881CDF6FF call 00404D68

:00497FE7 8B55D4 mov edx, dword ptr [ebp-2C]

:00497FEA 8D45E4 lea eax, dword ptr [ebp-1C]

====>结果 倒序 放[ebp-1C]

* * * *

:00497FED 8B4DE4 mov ecx, dword ptr [ebp-1C]

====>循环结果

ECX=0110001011011101100010001101110110001000

:00497FF0 E897CEF6FF call 00404E8C

:00497FF5 46 inc esi

:00497FF6 83FE29 cmp esi, 00000029

====>40次

:00497FF9 75B9 jne 00497FB4

====>呵呵，“没完没了”的循环！

:00497FFB 8D45F0 lea eax, dword ptr [ebp-10]

:00497FFE 8B4DE4 mov ecx, dword ptr [ebp-1C]

D ECX=0110001011011101100010001101110110001000

:00498001 8B55E8 mov edx, dword ptr [ebp-18]

D EDX=0010100011110101111101011010000010100000

:00498004 E883CEF6FF call 00404E8C

:00498009 8D45EC lea eax, dword ptr [ebp-14]

:0049800C E877CBF6FF call 00404B88

:00498011 BE01000000 mov esi, 00000001

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

5、下面循环的作用是将上面所得的二进制码每4位转化为对应的16进制码！

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:00498055(C)

|

:00498016 8BC6 mov eax, esi

:00498018 48 dec eax

:00498019 8BD8 mov ebx, eax

:0049801B C1E303 shl ebx, 03

:0049801E 43 inc ebx

:0049801F 8D45E8 lea eax, dword ptr [ebp-18]

:00498022 50 push eax

:00498023 B908000000 mov ecx, 00000008

:00498028 8BD3 mov edx, ebx

:0049802A 8B45F0 mov eax, dword ptr [ebp-10]

====>EAX=00101000111101011111010110

100000101000000110001011011101100010001101110110001000

:0049802D E866D0F6FF call 00405098

:00498032 8B45E8 mov eax, dword ptr [ebp-18]

:00498035 E822FEFFFF call 00497E5C

:0049803A 8BD8 mov ebx, eax

:0049803C 8D45D0 lea eax, dword ptr [ebp-30]

:0049803F 8BD3 mov edx, ebx

:00498041 E822CDF6FF call 00404D68

:00498046 8B55D0 mov edx, dword ptr [ebp-30]

:00498049 8D45EC lea eax, dword ptr [ebp-14]

:0049804C E8F7CDF6FF call 00404E48

:00498051 46 inc esi

:00498052 83FE0B cmp esi, 0000000B

:00498055 75BF jne 00498016

====>呵呵，循环吧。

第5步得出：28 F5 F5 A0 A0 62 DD 88 DD

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

:00498057 C745DC07000000 mov [ebp-24], 00000007

:0049805E BE01000000 mov esi, 00000001

:00498063 8D45F0 lea eax, dword ptr [ebp-10]

:00498066 E81DCBF6FF call 00404B88

:0049806B BB01000000 mov ebx, 00000001

&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&

6、分别从程序自给的5078346中取数运算，与上面所得的值异或！

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:004980C0(C)

|

:00498070 8B45EC mov eax, dword ptr [ebp-14]

:00498073 0FB67C18FF movzx edi, byte ptr [eax+ebx-01]

====>分别取数！

====>1、EDI=28

====>2、EDI=F5

====>3、EDI=F5

====>4、EDI=A0

====>5、EDI=A0

====>6、EDI=62

====>7、EDI=DD

====>8、EDI=88

====>9、EDI=DD

====>10、EDI=88

:00498078 8D45CC lea eax, dword ptr [ebp-34]

:0049807B 50 push eax

:0049807C B901000000 mov ecx, 00000001

:00498081 8BD6 mov edx, esi

* Possible StringData Ref from Code Obj ->"5078346"

====>注意5078346

后来发现下面的CALL从5078346中取数是固定的！呵呵，总算是捡了点“便宜”

:00498083 B814814900 mov eax, 00498114

:00498088 E80BD0F6FF call 00405098

:0049808D 8B45CC mov eax, dword ptr [ebp-34]

:00498090 E8D715F7FF call 0040966C

:00498095 03C3 add eax, ebx

====>1、1+5=6

====>2、0+2=2

====>3、7+3=A

====>4、8+4=C

====>5、3+5=8

====>6、4+6=A

====>7、6+7=D

====>8、5+8=D

====>9、0+9=9

====>10、7+A=11

:00498097 83C02D add eax, 0000002D

====>1、6+2D=33

====>2、2+2D=2F

====>3、A+2D=37

====>4、C+2D=39

====>5、8+2D=35

====>6、A+2D=37

====>7、D+2D=3A

====>8、D+2D=3A

====>9、9+2D=36

====>10、11+2D=3E

:0049809A 33F8 xor edi, eax

====>分别与第5步得到的值异或！

====>1、28 XOR 33=1B

====>2、F5 XOR 2F=DA

====>3、F5 XOR 37=C2

====>4、A0 XOR 39=99

====>5、A0 XOR 35=95

====>6、62 XOR 37=55

====>7、DD XOR 3A=E7

====>8、88 XOR 3A=B2

====>9、DD XOR 36=EB

====>10、88 XOR 3E=B6

异或后所得的结果：1BDAC2999555E7B2EBB6 将和我们的机器码进行比较，

如果相同就注册成功了！

:0049809C 8D45F4 lea eax, dword ptr [ebp-0C]

:0049809F 8BD7 mov edx, edi

:004980A1 E8C2CCF6FF call 00404D68

:004980A6 8D45F0 lea eax, dword ptr [ebp-10]

:004980A9 8B55F4 mov edx, dword ptr [ebp-0C]

:004980AC E897CDF6FF call 00404E48

:004980B1 46 inc esi

:004980B2 3B75DC cmp esi, dword ptr [ebp-24]

:004980B5 7E05 jle 004980BC

:004980B7 BE01000000 mov esi, 00000001

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:004980B5(C)

|

:004980BC 43 inc ebx

:004980BD 83FB0B cmp ebx, 0000000B

:004980C0 75AE jne 00498070

====>循环！

&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&

:004980C2 8B45F8 mov eax, dword ptr [ebp-08]

:004980C5 8B55F0 mov edx, dword ptr [ebp-10]

:004980C8 E80FCBF6FF call 00404BDC

:004980CD 33C0 xor eax, eax

:004980CF 5A pop edx

:004980D0 59 pop ecx

:004980D1 59 pop ecx

:004980D2 648910 mov dword ptr fs:[eax], edx

:004980D5 6804814900 push 00498104

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:00498102(U)

|

:004980DA 8D45CC lea eax, dword ptr [ebp-34]

:004980DD BA04000000 mov edx, 00000004

:004980E2 E8C5CAF6FF call 00404BAC

:004980E7 8D45E0 lea eax, dword ptr [ebp-20]

:004980EA BA06000000 mov edx, 00000006

:004980EF E8B8CAF6FF call 00404BAC

:004980F4 8D45FC lea eax, dword ptr [ebp-04]

:004980F7 E88CCAF6FF call 00404B88

:004980FC C3 ret

—————————————————————————————

二、F8进入比较CALL：004A9036 call 00404F84

:00404F84 53 push ebx

:00404F85 56 push esi

:00404F86 57 push edi

:00404F87 89C6 mov esi, eax

:00404F89 89D7 mov edi, edx

:00404F8B 39D0 cmp eax, edx

====>D EDX=1BDAC2999555E7B2EBB6

====>D EAX=A8F4W303XY

呵呵，把我们输入的试炼码经过“千折百转”折腾后得到的字符与机器码比较，

如果相同就OK，不同则OVER！有线索了！！！

:00404F8D 0F848F000000 je 00405022

:00404F93 85F6 test esi, esi

:00404F95 7468 je 00404FFF

:00404F97 85FF test edi, edi

:00404F99 746B je 00405006

:00404F9B 8B46FC mov eax, dword ptr [esi-04]

:00404F9E 8B57FC mov edx, dword ptr [edi-04]

:00404FA1 29D0 sub eax, edx

:00404FA3 7702 ja 00404FA7

—————————————————————————————

【总 结】：

OK！虽然我现在已是头晕眼花了，但还是乘胜追击！“不可沽名学霸王”，呵呵，说不定一觉睡后算法忘了大半，岂不可惜！

算法已经知道了，我们就来对它进行逆反追击！

一、现在知道：我们输入的试炼码经过层层转化后必须与我们的机器码 A8F4W303XY 相同！所以，从第6步的循环开始逆转！

A8F4W303XY所对应的HEX值为41384634573330335859

1、28 XOR 33=1B （1）、33 XOR 41=72

2、F5 XOR 2F=DA （2）、2F XOR 38=17

3、F5 XOR 37=C2 （3）、37 XOR 46=71

4、A0 XOR 39=99 （4）、39 XOR 34=0D

5、A0 XOR 35=95 （5）、35 XOR 57=62

6、62 XOR 37=55 （6）、37 XOR 33=04

7、DD XOR 3A=E7 （7）、3A XOR 30=0A

8、88 XOR 3A=B2 （8）、3A XOR 33=09

9、DD XOR 36=EB （9）、36 XOR 58=6E

10、88 XOR 3E=B6 （10）、3E XOR 59=67

呵呵，得出了第5个循环的另个结果：7217710D62040A096E67

二、逆反第5步的循环！

把 7217710D62

040A096E67作为十六进制数转化为二进制数：

0111 0010 0001 0111 0111 0001 0000 1101 0110 0010

0000 0100 0000 1010 0000 1001 0110 1110 0110 0111

三、逆反第4步！

先把上面的二进制码次序变反：

0100 0110 1011 0000 1000 1110 1110 1000 0100 1110

1110 0110 0111 0110 1001 0000 0101 0000 0010 0000

然后再把奇、偶位的次序恢复！得到第3步循环的另个结果：

0111 0100 0011 1100 1001 1111 0001 0100 1100 0001 1010 1000 1011 1001 1000 0000 0010 0100 1010 1000

四、逆反我们的第3步！

上面二进制码转化为字符：

7 4 3 C 9 F 1 4 C 1 A 8 B 9 8 0 2 4 A 8

五、逆反我们的第2步、第1步！

呵呵，偷点巧，我们不用再转化为HEX值再分别加上32再转化为大写字母。

看看程序是如何转化我们的试炼码吧：

BCDEFGHIJKSTUVWXCDEF ====> 0123456789ABCDEF1234

所以：我们简单的就找到对应关系了！

IFEUKXCFUCSJTKJBDFSJ <===> 743C9F14C1A8B98024A8

呵呵，IFEUKXCFUCSJTKJBDFSJ 就是我“千辛万苦”所追击的真码了！

“大功”告成！我也该休息了。^-^

从下载到现在完成，用了一下午加大半个晚上，哦，10个小时才饶幸解开了这个家伙。这应该是我学破解以来分析过的最“复杂”的算法了。

—————————————————————————————

【注册信息保存】：

程序文件夹下的 Encode.ini 中。

—————————————————————————————

【整 理】：

机器码：A8F4W303XY

注册码：IFEUKXCFUCSJTKJBDFSJ

OK！我们成功了！但是程序会提示：“请注意：您现在使用的是共享免费版，功能受到限制，只有使用我们发给您的真正共享版进行注册才能得到全部功能。”

呵呵，这可不是我的错呀！作者很精明的。

不过我没打算要使用这个软件。^-^^-^

Cracked By 巢水工作坊——fly【OCN】

2003-2-11 凌晨 2:30

（出处：赢政天下整理收藏）

相关文章：

·语音界面2.0算法分析及注册机源码！

·侠客系统修改器1.21破解手记--算法分析

·中文拨号上网计时计费器 V4.12注册算法分析

·ClockWise 3.22e注册码算法分析

·CoolClock V1.02注册算法分析

·Directory Scanner v1.5 注册算法分析

·Disk Chief 1.2 简单注册算法分析

·EffeTech HTTP Sniffer 3.2注册算法分析

·eLib2.01算法分析

·EZ MP3 Recorder 1.15 注册算法分析

相关软件：

→ 特别推荐

→ 热点TOP10

我为人人《《==》》人人为我

关于我们 |

帮助(？)

| 广告服务 |

版权声明 |

商业合作 |

发展历程 |

加盟我们 |

联系我们

Copyright © 1999-2003

winzheng.com All Rights Reserved.

繁体版:由华琦数码技术提供

Powered

by:MeSky.Net