中文编辑排版专家—DreamEdit破解手记
***************************************************
软件名称：DreamEdit 2.3.1
大 小：1.87MB
加密方式：Aspack 2.001 + 注册码
使用工具：TRW2000 1.22汉化注册版，w32Dasm黄金中文版，fi2.49
pj日期：爆破于2003年2月25日，算法分析于2003年3月25
***************************************************
PJ说明：本软件是readbook的一个免费组件，但也有注册码，注册后就不会出现未注册的字样。之所之要破解，主要是学习手动脱壳和巩固爆破。
作者newlaos申明：只是学习，请不用于商业用途或是将本文方法制作的注册机任意传播，造成后果，本人一概不负。
一、爆破
1、首先用fi2.49侦测，知道是用Aspack 2.001加了壳，通过各种脱壳软件都可以很快搞定。手动脱壳出不难，用TRW2000载入DreamEdit 2.3.1，后通过F10步进，F8跟入关键CALL，F7跳开循环，就可以找到关键的领空跳转，再用PEDUMP，就生成了一个可执行的脱壳文件（用makepe生成的文件，运行时会出错）。
2、用w32Dasm黄金中文版静态反汇编，再用“串式数据参考”，找"中文编辑排版专家—DreamEdit（未注册）"，来到下面这个段。
:0054C3C0 683AC65400 push 0054C63A
:0054C3C5 64FF30 push dword ptr fs:[eax]
:0054C3C8 648920 mov dword ptr fs:[eax], esp
:0054C3CB E8FC67EBFF call 00402BCC
:0054C3D0 E8CF09FAFF call 004ECDA4
:0054C3D5 84C0 test al, al <======关键对比
:0054C3D7 740E je 0054C3E7 <======跳则，显示“未注册”，所以把740E改为750E可爆破
* Possible StringData Ref from Code Obj ->"中文编辑排版专家—DreamEdit"
|
:0054C3D9 BA50C65400 mov edx, 0054C650
:0054C3DE 8BC3 mov eax, ebx
:0054C3E0 E8C3CEEEFF call 004392A8
:0054C3E5 EB0C jmp 0054C3F3 <=======跳转到程序正式运行部分。
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0054C3D7(C)
|
* Possible StringData Ref from Code Obj ->"中文编辑排版专家—DreamEdit（未注册）"
|
:0054C3E7 BA74C65400 mov edx, 0054C674
:0054C3EC 8BC3 mov eax, ebx
:0054C3EE E8B5CEEEFF call 004392A8
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0054C3E5(U)
|
:0054C3F3 C6830808000000 mov byte ptr [ebx+00000808], 00 <=======程序正式运行部分
:0054C3FA 8D55F8 lea edx, dword ptr [ebp-08]
:0054C3FD A120025900 mov eax, dword ptr [00590220]
:0054C402 8B00 mov eax, dword ptr [eax]
3、上面解决了“未注册显示部分”，下面再来看看序列号注册部分，还是用“串式数据参考”，找到"注册成功！感谢您对DreamEdit的支持！"，太经典的句子呀，来到下面这个段代码：
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:00548536(C)
|
:005485AC 55 push ebp
:005485AD 68BE865400 push 005486BE
:005485B2 64FF30 push dword ptr fs:[eax]
:005485B5 648920 mov dword ptr fs:[eax], esp
:005485B8 8D55FC lea edx, dword ptr [ebp-04]
:005485BB 8B8300030000 mov eax, dword ptr [ebx+00000300]
:005485C1 E8B20CEFFF call 00439278
:005485C6 8B45FC mov eax, dword ptr [ebp-04]
:005485C9 E85247FAFF call 004ECD20
:005485CE 84C0 test al, al <========关键对比
:005485D0 0F84B4000000 je 0054868A <========关键跳转，过去就变成“错误注册号了”，就改这里了
:005485D6 8D55F8 lea edx, dword ptr [ebp-08]
:005485D9 8B8300030000 mov eax, dword ptr [ebx+00000300]
:005485DF E8940CEFFF call 00439278
:005485E4 8B45F8 mov eax, dword ptr [ebp-08]
:005485E7 50 push eax
:005485E8 8D55F4 lea edx, dword ptr [ebp-0C]
:005485EB 8B83F4020000 mov eax, dword ptr [ebx+000002F4]
:005485F1 E8820CEFFF call 00439278
:005485F6 8B45F4 mov eax, dword ptr [ebp-0C]
:005485F9 5A pop edx
:005485FA E8FDBEEBFF call 004044FC
:005485FF 85C0 test eax, eax <=========关键对比
:00548601 0F8E83000000 jle 0054868A <=========第二个关键跳转，过去就变成“错误注册号了”，改这里
:00548607 8D55F0 lea edx, dword ptr [ebp-10]
:0054860A 8B8300030000 mov eax, dword ptr [ebx+00000300]
:00548610 E8630CEFFF call 00439278
:00548615 8B45F0 mov eax, dword ptr [ebp-10]
:00548618 50 push eax
:00548619 A17C005900 mov eax, dword ptr [0059007C]
:0054861E 8B00 mov eax, dword ptr [eax]
* Possible StringData Ref from Code Obj ->"code"
|
:00548620 B9D4865400 mov ecx, 005486D4
* Possible StringData Ref from Code Obj ->"User"
|
:00548625 BAE4865400 mov edx, 005486E4
:0054862A 8B30 mov esi, dword ptr [eax]
:0054862C FF5604 call [esi+04]
:0054862F 8D55EC lea edx, dword ptr [ebp-14]
:00548632 8B83F4020000 mov eax, dword ptr [ebx+000002F4]
:00548638 E83B0CEFFF call 00439278
:0054863D 8B45EC mov eax, dword ptr [ebp-14]
:00548640 50 push eax
:00548641 A17C005900 mov eax, dword ptr [0059007C]
:00548646 8B00 mov eax, dword ptr [eax]
* Possible StringData Ref from Code Obj ->"Name"
|
:00548648 B9F4865400 mov ecx, 005486F4
* Possible StringData Ref from Code Obj ->"User"
|
:0054864D BAE4865400 mov edx, 005486E4
:00548652 8B30 mov esi, dword ptr [eax]
:00548654 FF5604 call [esi+04]
:00548657 6A40 push 00000040
* Possible StringData Ref from Code Obj ->"注册成功"
|
:00548659 68FC865400 push 005486FC
* Possible StringData Ref from Code Obj ->"注册成功！感谢您对DreamEdit的支持！"
|
:0054865E 6808875400 push 00548708
:00548663 8BC3 mov eax, ebx
:00548665 E8326EEFFF call 0043F49C
:0054866A 50 push eax
:0054866B E8B401ECFF call 00408824
:00548670 A1A0005900 mov eax, dword ptr [005900A0]
:00548675 8B00 mov eax, dword ptr [eax]
* Possible StringData Ref from Code Obj ->"中文编辑排版专家—DreamEdit"
|
:00548677 BA34875400 mov edx, 00548734
:0054867C E8270CEFFF call 004392A8
:00548681 8BC3 mov eax, ebx
:00548683 E864D0F0FF call 004556EC
:00548688 EB19 jmp 005486A3 <=====跳入程序正式部分
* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:005485D0(C), :00548601(C)
|
:0054868A 6A10 push 00000010
* Possible StringData Ref from Code Obj ->"错误"
|
:0054868C 6850875400 push 00548750
* Possible StringData Ref from Code Obj ->"用户名或注册码错误(请注意区分大小写)！"
|
:00548691 6858875400 push 00548758
:00548696 8BC3 mov eax, ebx
:00548698 E8FF6DEFFF call 0043F49C
:0054869D 50 push eax
:0054869E E88101ECFF call 00408824
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:00548688(U)
|
:005486A3 33C0 xor eax, eax <======程序正式部分
:005486A5 5A pop edx
:005486A6 59 pop ecx
:005486A7 59 pop ecx
:005486A8 648910 mov dword ptr fs:[eax], edx
:005486AB 68C5865400 push 005486C5
4、到这里，程序算是爆破完成，但与算注册号的方法还是有差距，因为程序每次启动，都会在DreamEdit.ini文件里读取用户名和注册号，进行运算，不对就会显示“未注册”，当然我爆破了（在上面），也不会显示。
二、算法分析(简单，建议初学者以此为开始)
1、开始步骤同上
.......
.......
:005485AC 55 push ebp
:005485AD 68BE865400 push 005486BE
:005485B2 64FF30 push dword ptr fs:[eax]
:005485B5 648920 mov dword ptr fs:[eax], esp
:005485B8 8D55FC lea edx, dword ptr [ebp-04]
:005485BB 8B8300030000 mov eax, dword ptr [ebx+00000300]
:005485C1 E8B20CEFFF call 00439278 <===这里EAX=8，注册码长度
:005485C6 8B45FC mov eax, dword ptr [ebp-04]<===EAX=78787878
:005485C9 E85247FAFF call 004ECD20 <===这里是个关键的CALL，要正确则这里EAX返回时不能为0
:005485CE 84C0 test al, al <===我们将注册码改为78787876后，重新来
:005485D0 0F84B4000000 je 0054868A <===呵呵，从这里跳过去，就OVER
:005485D6 8D55F8 lea edx, dword ptr [ebp-08]
:005485D9 8B8300030000 mov eax, dword ptr [ebx+00000300]
:005485DF E8940CEFFF call 00439278
:005485E4 8B45F8 mov eax, dword ptr [ebp-08]
:005485E7 50 push eax
:005485E8 8D55F4 lea edx, dword ptr [ebp-0C]
:005485EB 8B83F4020000 mov eax, dword ptr [ebx+000002F4]
:005485F1 E8820CEFFF call 00439278
:005485F6 8B45F4 mov eax, dword ptr [ebp-0C]
:005485F9 5A pop edx <===EDX=78787876，EAX=newlaos
:005485FA E8FDBEEBFF call 004044FC <===关键的CALL，F8跟进看看，要正确则EAX不能为0
:005485FF 85C0 test eax, eax
:00548601 0F8E83000000 jle 0054868A <===呵呵，从这里跳过去，就OVER。
:00548607 8D55F0 lea edx, dword ptr [ebp-10]
:0054860A 8B8300030000 mov eax, dword ptr [ebx+00000300]
:00548610 E8630CEFFF call 00439278
:00548615 8B45F0 mov eax, dword ptr [ebp-10]
:00548618 50 push eax
:00548619 A17C005900 mov eax, dword ptr [0059007C]
:0054861E 8B00 mov eax, dword ptr [eax]
* Possible StringData Ref from Code Obj ->"code"
|
:00548620 B9D4865400 mov ecx, 005486D4
* Possible StringData Ref from Code Obj ->"User"
|
:00548625 BAE4865400 mov edx, 005486E4
:0054862A 8B30 mov esi, dword ptr [eax]
:0054862C FF5604 call [esi+04]
:0054862F 8D55EC lea edx, dword ptr [ebp-14]
:00548632 8B83F4020000 mov eax, dword ptr [ebx+000002F4]
:00548638 E83B0CEFFF call 00439278
:0054863D 8B45EC mov eax, dword ptr [ebp-14]
:00548640 50 push eax
:00548641 A17C005900 mov eax, dword ptr [0059007C]
:00548646 8B00 mov eax, dword ptr [eax]
* Possible StringData Ref from Code Obj ->"Name"
|
:00548648 B9F4865400 mov ecx, 005486F4
* Possible StringData Ref from Code Obj ->"User"
|
:0054864D BAE4865400 mov edx, 005486E4
:00548652 8B30 mov esi, dword ptr [eax]
:00548654 FF5604 call [esi+04]
:00548657 6A40 push 00000040
* Possible StringData Ref from Code Obj ->"注册成功"
|
:00548659 68FC865400 push 005486FC
* Possible StringData Ref from Code Obj ->"注册成功！感谢您对DreamEdit的支持！"
|
:0054865E 6808875400 push 00548708
:00548663 8BC3 mov eax, ebx
:00548665 E8326EEFFF call 0043F49C
:0054866A 50 push eax
:0054866B E8B401ECFF call 00408824
:00548670 A1A0005900 mov eax, dword ptr [005900A0]
:00548675 8B00 mov eax, dword ptr [eax]
* Possible StringData Ref from Code Obj ->"中文编辑排版专家—DreamEdit"
|
:00548677 BA34875400 mov edx, 00548734
:0054867C E8270CEFFF call 004392A8
:00548681 8BC3 mov eax, ebx
:00548683 E864D0F0FF call 004556EC
:00548688 EB19 jmp 005486A3
* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:005485D0(C), :00548601(C) <===有两处会跳到错误的地方来，向上看
|
:0054868A 6A10 push 00000010
* Possible StringData Ref from Code Obj ->"错误"
|
:0054868C 6850875400 push 00548750
* Possible StringData Ref from Code Obj ->"用户名或注册码错误(请注意区分大小写)！"
|
:00548691 6858875400 push 00548758
:00548696 8BC3 mov eax, ebx
:00548698 E8FF6DEFFF call 0043F49C
:0054869D 50 push eax
:0054869E E88101ECFF call 00408824
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:00548688(U)
|
:005486A3 33C0 xor eax, eax
:005486A5 5A pop edx
:005486A6 59 pop ecx
:005486A7 59 pop ecx
:005486A8 648910 mov dword ptr fs:[eax], edx
:005486AB 68C5865400 push 005486C5
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:005486C3(U)
|
:005486B0 8D45EC lea eax, dword ptr [ebp-14]
:005486B3 BA05000000 mov edx, 00000005
:005486B8 E8F7B8EBFF call 00403FB4
:005486BD C3 ret
:005486BE E9C5B2EBFF jmp 00403988
:005486C3 EBEB jmp 005486B0
:005486C5 5E pop esi
:005486C6 5B pop ebx
:005486C7 8BE5 mov esp, ebp
:005486C9 5D pop ebp
:005486CA C3 ret
----------005485C9 call 004ECD20 关键的CALL，F8跟进来到这列代码段-----------------
功能：要正确则这里EAX返回时不能为0，要求注册码每个字符的ASC码相加能够整除D，就正解过关。
* Referenced by a CALL at Addresses:
|:004ECDD4 , :005485C9
|
:004ECD20 55 push ebp
:004ECD21 8BEC mov ebp, esp
:004ECD23 51 push ecx
:004ECD24 53 push ebx
:004ECD25 8945FC mov dword ptr [ebp-04], eax
:004ECD28 8B45FC mov eax, dword ptr [ebp-04]
:004ECD2B E89476F1FF call 004043C4
:004ECD30 33C0 xor eax, eax
:004ECD32 55 push ebp
:004ECD33 6897CD4E00 push 004ECD97
:004ECD38 64FF30 push dword ptr fs:[eax]
:004ECD3B 648920 mov dword ptr fs:[eax], esp
:004ECD3E 8B45FC mov eax, dword ptr [ebp-04]
:004ECD41 E8CA74F1FF call 00404210
:004ECD46 83F805 cmp eax, 00000005 <===如果注册码小于等于5，就OVER
:004ECD49 7D04 jge 004ECD4F
:004ECD4B 33DB xor ebx, ebx
:004ECD4D EB32 jmp 004ECD81
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004ECD49(C)
|
:004ECD4F 33DB xor ebx, ebx
:004ECD51 8B45FC mov eax, dword ptr [ebp-04]
:004ECD54 E8B774F1FF call 00404210
:004ECD59 85C0 test eax, eax
:004ECD5B 7E13 jle 004ECD70
:004ECD5D BA01000000 mov edx, 00000001 <===计数器，初始化为1
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004ECD6E(C)
|
:004ECD62 8B4DFC mov ecx, dword ptr [ebp-04]
:004ECD65 0FB64C11FF movzx ecx, byte ptr [ecx+edx-01]
:004ECD6A 03D9 add ebx, ecx
:004ECD6C 42 inc edx
:004ECD6D 48 dec eax
:004ECD6E 75F2 jne 004ECD62 <===这里构成一个小循环，就是将输入的注册码的ASC码的十六进制相加。
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004ECD5B(C)
|
:004ECD70 8BC3 mov eax, ebx <===将相加之和放入EAX
:004ECD72 B90D000000 mov ecx, 0000000D <===ECX=D
:004ECD77 99 cdq
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004ECD11(C)
|
:004ECD78 F7F9 idiv ecx <===EAX除以ECX，商回EAX，余数回EDX
:004ECD7A 85D2 test edx, edx <===如果EDX=0，即能整除，则标志ZF=1，才能正确
:004ECD7C 0F94C0 sete al <===这里是用标志位来设置AL，关键的关键!
:004ECD7F 8BD8 mov ebx, eax <===又将EAX的值放入EBX
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004ECD4D(U)
|
:004ECD81 33C0 xor eax, eax
:004ECD83 5A pop edx
:004ECD84 59 pop ecx
:004ECD85 59 pop ecx
:004ECD86 648910 mov dword ptr fs:[eax], edx
:004ECD89 689ECD4E00 push 004ECD9E
:004ECD8E 8D45FC lea eax, dword ptr [ebp-04]
:004ECD91 E8FA71F1FF call 00403F90
:004ECD96 C3 ret
:004ECD97 E9EC6BF1FF jmp 00403988
:004ECD9C EBF0 jmp 004ECD8E
:004ECD9E 8BC3 mov eax, ebx <===注意EBX的值不能为0
:004ECDA0 5B pop ebx
:004ECDA1 59 pop ecx
:004ECDA2 5D pop ebp
:004ECDA3 C3 ret
<===为能通过第一关，我们将注册码改为78787876，重新来。
-------005485FA call 004044FC 关键的CALL，F8跟进,来到下面代码段-------------------
要正确，则EAX不能为0----------------------------------------------
初始值：EDX=78787876，EAX=newlaos
:004044FC 85C0 test eax, eax
:004044FE 7440 je 00404540 <===不跳
:00404500 85D2 test edx, edx
:00404502 7431 je 00404535 <===不跳
:00404504 53 push ebx
:00404505 56 push esi
:00404506 57 push edi
:00404507 89C6 mov esi, eax <===EAX=newlaos
:00404509 89D7 mov edi, edx <===EDX=78787876
:0040450B 8B4FFC mov ecx, dword ptr [edi-04] <===ECX等于8，注册码长度
:0040450E 57 push edi
:0040450F 8B56FC mov edx, dword ptr [esi-04] <===EDX等于7，姓名长度
:00404512 4A dec edx <===EDX=EDX-1=6
:00404513 781B js 00404530 <===不跳
:00404515 8A06 mov al, byte ptr [esi] <===将newlaos的第一个字符放入EAX的低位6E
:00404517 46 inc esi
:00404518 29D1 sub ecx, edx <===ECX=ECX-EDX=8-6=2
:0040451A 7E14 jle 00404530 <===不跳，跳了就OVER了，说明注册码至少与姓名等长，而不能短于姓名
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0040452E(U)
|
:0040451C F2 repnz
:0040451D AE scasb <===这里十分关键，主要是看在你的注册码里包含有你的输入的姓名
:0040451E 7510 jne 00404530 <===不相等就跳向OVER
:00404520 89CB mov ebx, ecx
:00404522 56 push esi
:00404523 57 push edi
:00404524 89D1 mov ecx, edx
:00404526 F3 repz
:00404527 A6 cmpsb
:00404528 5F pop edi
:00404529 5E pop esi
:0040452A 740C je 00404538 <===只有相等，才从这里跳走是正确的
:0040452C 89D9 mov ecx, ebx
:0040452E EBEC jmp 0040451C <===呵呵，这里构成一个小循环
* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:00404513(C), :0040451A(C), :0040451E(C)
|
:00404530 5A pop edx
:00404531 31C0 xor eax, eax
:00404533 EB08 jmp 0040453D
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:00404502(C)
|
:00404535 31C0 xor eax, eax
:00404537 C3 ret
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0040452A(C)
|
:00404538 5A pop edx
:00404539 89F8 mov eax, edi
:0040453B 29D0 sub eax, edx
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:00404533(U)
|
:0040453D 5F pop edi
:0040453E 5E pop esi
:0040453F 5B pop ebx
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:004044FE(C)
|
:00404540 C3 ret
---------------------------------------------------------------------------------------------------
2、算法总结：
a、就是将输入的注册码的ASC码的十六进制相加，能整除D
b、注册码一定要比注册名长，且其中必须包含有注册名。
3、注册信息放在文件DreamEdit.ini里的
[User]
code=newlaosa
Name=newlaos
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