查找汉字笔画 V1.1 算法分析(1)

下载页面：http://gaoasp.nease.net/doc/hzbh.htm
软件大小：538K
运行环境：Windows 9x/NT/2000

【软件简介】：可查找任一汉字或一段汉字的笔画，功能经扩展后可用于教学、娱乐、文字处理等领域，如儿童识字、笔画算命以及需要按笔画排序处理等方面的应用

【软件限制】：NAG

【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】：

hzbh.exe 无壳。Visual C++ 6.0 编写。

用户名：FLY
试炼码：13572468

反汇编，根据出错提示很容易就找到核心了。
—————————————————————————————————
:004025B1 E8D60C0000              Call 0040328C
:004025B6 8D442424                lea eax, dword ptr [esp+24]
:004025BA 8D4C2418                lea ecx, dword ptr [esp+18]
:004025BE 50                      push eax
:004025BF 51                      push ecx
:004025C0 57                      push edi
:004025C1 683F000F00              push 000F003F
:004025C6 57                      push edi

* Possible StringData Ref from Data Obj ->"REG_SZ"
                                 |
:004025C7 6814CA4000              push 0040CA14
:004025CC 57                      push edi

* Possible StringData Ref from Data Obj ->"SOFTWARE\HZBH"
                                 |
:004025CD 6804CA4000              push 0040CA04
:004025D2 6802000080              push 80000002
:004025D7 C644245801              mov [esp+58], 01
:004025DC C7442448FF000000        mov [esp+48], 000000FF
:004025E4 897C2440                mov dword ptr [esp+40], edi

* Reference To: ADVAPI32.RegCreateKeyExA, Ord:015Fh
                                 |
:004025E8 FF1500404000            Call dword ptr [00404000]
:004025EE 3BC7                    cmp eax, edi
:004025F0 0F854C010000            jne 00402742
:004025F6 8D542410                lea edx, dword ptr [esp+10]
:004025FA 8BCE                    mov ecx, esi
:004025FC 52                      push edx
:004025FD 68F1030000              push 000003F1

* Reference To: MFC42.Ordinal:0C19, Ord:0C19h
                                 |
:00402602 E8E50C0000              Call 004032EC
:00402607 8D442414                lea eax, dword ptr [esp+14]
:0040260B 8BCE                    mov ecx, esi
:0040260D 50                      push eax
:0040260E 68F2030000              push 000003F2

* Reference To: MFC42.Ordinal:0C19, Ord:0C19h
                                 |
:00402613 E8D40C0000              Call 004032EC
:00402618 8D4C2410                lea ecx, dword ptr [esp+10]

* Reference To: MFC42.Ordinal:188A, Ord:188Ah
                                 |
:0040261C E80D0D0000              Call 0040332E
:00402621 8D4C2410                lea ecx, dword ptr [esp+10]

* Reference To: MFC42.Ordinal:188B, Ord:188Bh
                                 |
:00402625 E8FE0C0000              Call 00403328
:0040262A 8D4C2414                lea ecx, dword ptr [esp+14]

* Reference To: MFC42.Ordinal:188A, Ord:188Ah
                                 |
:0040262E E8FB0C0000              Call 0040332E
:00402633 8D4C2414                lea ecx, dword ptr [esp+14]

* Reference To: MFC42.Ordinal:188B, Ord:188Bh
                                 |
:00402637 E8EC0C0000              Call 00403328
:0040263C 8D4C2410                lea ecx, dword ptr [esp+10]

* Reference To: MFC42.Ordinal:106A, Ord:106Ah
                                 |
:00402640 E8DD0C0000              Call 00403322
                                 ====>把用户名转换成小写字母

:00402645 8B4C2410                mov ecx, dword ptr [esp+10]
                                 ====>ECX=fly               呵呵，取用户名的小写字母运算

:00402649 8B542414                mov edx, dword ptr [esp+14]
                                 ====>EDX=13572468

:0040264D 8B79F8                  mov edi, dword ptr [ecx-08]
                                 ====>EDI=3                 用户名长度

:00402650 8B6AF8                  mov ebp, dword ptr [edx-08]
                                 ====>EBP=8                 试炼码长度

:00402653 47                      inc edi
:00402654 8D4C2410                lea ecx, dword ptr [esp+10]
:00402658 57                      push edi
:00402659 45                      inc ebp

* Reference To: MFC42.Ordinal:0B63, Ord:0B63h
                                 |
:0040265A E8BD0C0000              Call 0040331C
:0040265F 55                      push ebp
:00402660 8D4C2418                lea ecx, dword ptr [esp+18]
:00402664 89442424                mov dword ptr [esp+24], eax

* Reference To: MFC42.Ordinal:0B63, Ord:0B63h
                                 |
:00402668 E8AF0C0000              Call 0040331C
:0040266D 8BD8                    mov ebx, eax
:0040266F 8D4FFF                  lea ecx, dword ptr [edi-01]
:00402672 33C0                    xor eax, eax
:00402674 895C2428                mov dword ptr [esp+28], ebx
:00402678 85C9                    test ecx, ecx
:0040267A 761C                    jbe 00402698

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:00402692(C)
|
:0040267C 8B5C2420                mov ebx, dword ptr [esp+20]
                                 ====>EBX=[esp+20]=fly

:00402680 33D2                    xor edx, edx
:00402682 8A1418                  mov dl, byte ptr [eax+ebx]
                                 ====>依次取fly字符的HEX值
                           1、   ====>DL=66
                           2、   ====>DL=6C
                           3、   ====>DL=79

:00402685 8B5C241C                mov ebx, dword ptr [esp+1C]
:00402689 03DA                    add ebx, edx
                           1、   ====>EDX=66 + 00=66
                           2、   ====>EDX=6C + 66=D2
                           3、   ====>EDX=79 + D2=14B

:0040268B 40                      inc eax
:0040268C 3BC1                    cmp eax, ecx
:0040268E 895C241C                mov dword ptr [esp+1C], ebx
:00402692 72E8                    jb 0040267C
                                 ====>循环累加用户名字符的HEX值

:00402694 8B5C2428                mov ebx, dword ptr [esp+28]
                                 ====>EBX=13572468

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0040267A(C)
|
:00402698 53                      push ebx

* Reference To: MSVCRT.atol, Ord:023Eh
                                 |
:00402699 FF1578424000            Call dword ptr [00404278]
                                 ====>求13572468的16进制值：EAX=00CF1974

:0040269F 8B4C2420                mov ecx, dword ptr [esp+20]
                                 ====>ECX=0000014B

:004026A3 83C404                  add esp, 00000004
:004026A6 3BC8                    cmp ecx, eax
                                 ====>比较了！
                                 ====>ECX=0000014B   用户名字符HEX值累加的结果
                                 ====>EAX=00CF1974   试炼码的16进制值

:004026A8 7577                    jne 00402721
                                 ====>跳则OVER！            爆破点 ①

:004026AA 83FF01                  cmp edi, 00000001
                                 ====>用户名长度要至少1位

:004026AD 7672                    jbe 00402721
                                 ====>跳则OVER！            爆破点 ②

:004026AF 83FD01                  cmp ebp, 00000001
                                 ====>注册码长度要至少1位

:004026B2 766D                    jbe 00402721
                                 ====>跳则OVER！            爆破点 ②

:004026B4 8B442420                mov eax, dword ptr [esp+20]
:004026B8 8B4C2418                mov ecx, dword ptr [esp+18]
:004026BC 57                      push edi

* Reference To: ADVAPI32.RegSetvalueExA, Ord:0186h
                                 |
:004026BD 8B3D08404000            mov edi, dword ptr [00404008]
:004026C3 50                      push eax
:004026C4 6A01                    push 00000001
:004026C6 6A00                    push 00000000

                                 ====>下面保存注册信息
* Possible StringData Ref from Data Obj ->"UserName"
                                 |
:004026C8 68F8C94000              push 0040C9F8
:004026CD 51                      push ecx
:004026CE FFD7                    call edi
:004026D0 8B542418                mov edx, dword ptr [esp+18]
:004026D4 55                      push ebp
:004026D5 53                      push ebx
:004026D6 6A01                    push 00000001
:004026D8 6A00                    push 00000000

* Possible StringData Ref from Data Obj ->"PassWord"
                                 |
:004026DA 68ECC94000              push 0040C9EC
:004026DF 52                      push edx
:004026E0 FFD7                    call edi
:004026E2 8B442418                mov eax, dword ptr [esp+18]
:004026E6 50                      push eax

* Reference To: ADVAPI32.RegCloseKey, Ord:015Bh
                                 |
:004026E7 FF150C404000            Call dword ptr [0040400C]
:004026ED 8B4E20                  mov ecx, dword ptr [esi+20]
:004026F0 6A01                    push 00000001
:004026F2 51                      push ecx

* Reference To: USER32.KillTimer, Ord:0195h
                                 |
:004026F3 FF15DC424000            Call dword ptr [004042DC]
:004026F9 6840100000              push 00001040

* Possible StringData Ref from Data Obj ->"注册信息"
                                 |
:004026FE 6854CB4000              push 0040CB54

* Possible StringData Ref from Data Obj ->"您成功注册！"
                                 ====>呵呵，胜利女神！

:00402703 6844CB4000              push 0040CB44
:00402708 8BCE                    mov ecx, esi

* Reference To: MFC42.Ordinal:1080, Ord:1080h
                                 |
:0040270A E8010C0000              Call 00403310
:0040270F 8B15ACCC4000            mov edx, dword ptr [0040CCAC]
:00402715 6A00                    push 00000000
:00402717 8D4A64                  lea ecx, dword ptr [edx+64]

* Reference To: MFC42.Ordinal:0A52, Ord:0A52h
                                 |
:0040271A E8910B0000              Call 004032B0
:0040271F EB21                    jmp 00402742

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004026A8(C), :004026AD(C), :004026B2(C)
|
:00402721 8B442418                mov eax, dword ptr [esp+18]
:00402725 50                      push eax

* Reference To: ADVAPI32.RegCloseKey, Ord:015Bh
                                 |
:00402726 FF150C404000            Call dword ptr [0040400C]
:0040272C 6810100000              push 00001010

* Possible StringData Ref from Data Obj ->"注册信息"
                                 |
:00402731 6854CB4000              push 0040CB54

* Possible StringData Ref from Data Obj ->"注册失败！"
                                 ====>BAD BOY！

                                
:00402736 6838CB4000              push 0040CB38
:0040273B 8BCE                    mov ecx, esi

* Reference To: MFC42.Ordinal:1080, Ord:1080h
                                 |
:0040273D E8CE0B0000              Call 00403310

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:004025F0(C), :0040271F(U)
|
:00402742 8BCE                    mov ecx, esi

* Reference To: MFC42.Ordinal:12F5, Ord:12F5h
                                 |
:00402744 E8470A0000              Call 00403190
:00402749 8D4C2414                lea ecx, dword ptr [esp+14]
:0040274D C644243400              mov [esp+34], 00

* Reference To: MFC42.Ordinal:0320, Ord:0320h
                                 |
:00402752 E8150A0000              Call 0040316C
:00402757 8D4C2410                lea ecx, dword ptr [esp+10]
:0040275B C7442434FFFFFFFF        mov [esp+34], FFFFFFFF

* Reference To: MFC42.Ordinal:0320, Ord:0320h
                                 |
:00402763 E8040A0000              Call 0040316C
:00402768 8B4C242C                mov ecx, dword ptr [esp+2C]
:0040276C 5F                      pop edi
:0040276D 5E                      pop esi
:0040276E 5D                      pop ebp
:0040276F 5B                      pop ebx
:00402770 64890D00000000          mov dword ptr fs:[00000000], ecx
:00402777 83C428                  add esp, 00000028
:0040277A C3                      ret

—————————————————————————————————