【原创】也谈神算超人Ⅲ算法分析及其注册机（写给学VB算法者）
――――手把手系列之六
【破解作者】 jackily
【作者主页】 http://estudy.ys168.com
【使用工具】 ollydbg
【软件名称】 神算超人Ⅲ v3.1
【作者声明】 本破解纯以学习和交流为目的，偶得一点心得，愿与大家分享:)
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一、给个理由先
前几天在看雪论坛看到一篇sharpair所写的关于神算超人Ⅲ算法分析的精华帖子。但发现其分析有一些不妥，一些关键性问题并没有分析透彻，本着学习交流的目的，现将我的分析写出来，一块共勉。
二、注册验证方式
该软件采用用户名和注册码的明码比较与重启验证相结合的方式。输入的用户名保存在目录中的cus文件中，注册码保存在regedit文件中。cus和regedit其实就是文本文件，在未注册之前，两个文件中都只有一对引号，当程序重启时，会读这两个文件中的内容来判断是否真正注册。一旦某个文件和既定形式不匹配则提示出错。这就是为什么sharpair所说的调试一次后再调试会出错(Run-time error'62',Input past end of file)。因为在调试时，打开了regedit文件，但我们一般没有执行完写入文件的操作就退出了，regedit文件中引号被清空，所以就出错了。
三、算法分析过程
先用peid检查，VB编写，无壳。用ollydbg载入程序，运行，然后断下_vbastrcmp函数，用户名、注册码分别输入“jackily”和“123456”断点在0058E5D8，沿着代码行定位到关键代码，分析如下：
0058E000 push ebp
0058E001 mov ebp,esp
0058E003 sub esp,0C
0058E006 push <jmp.&MSVBVM60.__vbaExceptHandler; SE handler installation
0058E00B mov eax,dword ptr fs:[0]
0058E011 push eax
0058E012 mov dword ptr fs:[0],esp
0058E019 sub esp,120
0058E01F push ebx
0058E020 push esi
0058E021 push edi
0058E022 mov dword ptr ss:[ebp-C],esp
0058E025 mov dword ptr ss:[ebp-8],神算超人.004012F8
0058E02C mov edi,dword ptr ss:[ebp+8]
0058E02F mov eax,edi
0058E031 and eax,1
0058E034 mov dword ptr ss:[ebp-4],eax
0058E037 and edi,FFFFFFFE
0058E03A push edi
0058E03B mov dword ptr ss:[ebp+8],edi
0058E03E mov ecx,dword ptr ds:[edi]
0058E040 call dword ptr ds:[ecx+4]
0058E043 push 神算超人.00571428 ; UNICODE "Regedit"
0058E048 push 1
0058E04A xor ebx,ebx
0058E04C push -1
0058E04E push 2
0058E050 mov dword ptr ss:[ebp-24],ebx
0058E053 mov dword ptr ss:[ebp-34],ebx
0058E056 mov dword ptr ss:[ebp-38],ebx
0058E059 mov dword ptr ss:[ebp-3C],ebx
0058E05C mov dword ptr ss:[ebp-40],ebx
0058E05F mov dword ptr ss:[ebp-50],ebx
0058E062 mov dword ptr ss:[ebp-60],ebx
0058E065 mov dword ptr ss:[ebp-70],ebx
0058E068 mov dword ptr ss:[ebp-74],ebx
0058E06B mov dword ptr ss:[ebp-78],ebx
0058E06E mov dword ptr ss:[ebp-7C],ebx
0058E071 mov dword ptr ss:[ebp-8C],ebx
0058E077 mov dword ptr ss:[ebp-9C],ebx
0058E07D mov dword ptr ss:[ebp-AC],ebx
0058E083 mov dword ptr ss:[ebp-BC],ebx
0058E089 mov dword ptr ss:[ebp-CC],ebx
0058E08F mov dword ptr ss:[ebp-DC],ebx
0058E095 call dword ptr ds:[<&MSVBVM60.__vbaFileOpen ;打开regedit文件
0058E09B mov edx,dword ptr ds:[edi]
0058E09D push edi
0058E09E call dword ptr ds:[edx+30C]
0058E0A4 push eax
0058E0A5 lea eax,dword ptr ss:[ebp-7C]
0058E0A8 push eax
0058E0A9 call dword ptr ds:[<&MSVBVM60.__vbaObj; MSVBVM60.__vbaObjSet
0058E0AF mov esi,eax
0058E0B1 lea edx,dword ptr ss:[ebp-74]
0058E0B4 push edx
0058E0B5 push esi
0058E0B6 mov ecx,dword ptr ds:[esi]
0058E0B8 call dword ptr ds:[ecx+A0]
0058E0BE cmp eax,ebx
0058E0C0 fclex
0058E0C2 jge short 神算超人.0058E0D6
0058E0C4 push 0A0
0058E0C9 push 神算超人.005719DC
0058E0CE push esi
0058E0CF push eax
0058E0D0 call dword ptr ds:[<&MSVBVM60.__vbaHre; MSVBVM60.__vbaHresultCheckObj
0058E0D6 mov edx,dword ptr ss:[ebp-74] ;“123456”，unicode型
0058E0D9 mov esi,dword ptr ds:[<&MSVBVM60.__vba; MSVBVM60.__vbaStrMove
0058E0DF lea ecx,dword ptr ss:[ebp-40]
0058E0E2 mov dword ptr ss:[ebp-74],ebx
0058E0E5 call esi ; <&MSVBVM60.__vbaStrMove
0058E0E7 lea ecx,dword ptr ss:[ebp-7C]
0058E0EA call dword ptr ds:[<&MSVBVM60.__vbaFre; MSVBVM60.__vbaFreeObj
0058E0F0 mov eax,dword ptr ss:[ebp-40] ; 输入的假码“123456”，unicode型
0058E0F3 push eax
0058E0F4 push 1
0058E0F6 push 神算超人.005719F0
0058E0FB call dword ptr ds:[<&MSVBVM60.__vbaWriteFile ;将假码写入regedit文件
0058E101 mov ecx,dword ptr ds:[edi]
0058E103 add esp,0C
0058E106 push edi
0058E107 call dword ptr ds:[ecx+304]
0058E10D lea edx,dword ptr ss:[ebp-7C]
0058E110 push eax
0058E111 push edx
0058E112 call dword ptr ds:[<&MSVBVM60.__vbaObj; MSVBVM60.__vbaObjSet
0058E118 mov ecx,dword ptr ds:[eax]
0058E11A lea edx,dword ptr ss:[ebp-74]
0058E11D push edx
0058E11E push eax
0058E11F mov dword ptr ss:[ebp-100],eax
0058E125 call dword ptr ds:[ecx+A0]
0058E12B cmp eax,ebx
0058E12D fclex
0058E12F jge short 神算超人.0058E149
0058E131 mov ecx,dword ptr ss:[ebp-100]
0058E137 push 0A0
0058E13C push 神算超人.005719DC
0058E141 push ecx
0058E142 push eax
0058E143 call dword ptr ds:[<&MSVBVM60.__vbaHre; MSVBVM60.__vbaHresultCheckObj
0058E149 mov edx,dword ptr ss:[ebp-74]
0058E14C lea ecx,dword ptr ss:[ebp-38]
0058E14F mov dword ptr ss:[ebp-74],ebx
0058E152 call esi
0058E154 lea ecx,dword ptr ss:[ebp-7C] ;call 后eax为用户名地址
0058E157 call dword ptr ds:[<&MSVBVM60.__vbaFre; MSVBVM60.__vbaFreeObj
0058E15D mov edx,dword ptr ss:[ebp-38]
0058E160 push edx ；用户名地址
0058E161 push 神算超人.00571450 ; 空地址
0058E166 call dword ptr ds:[<&MSVBVM60.__vbaStrCmp ;比较是否填用户名
0058E16C test eax,eax ；不等 eax为1
0058E16E je 神算超人.0058E4B1 ；没填用户名跳走。这里没跳
0058E174 lea ecx,dword ptr ss:[ebp-CC]
0058E17A push 1
0058E17C lea edx,dword ptr ss:[ebp-8C]
0058E182 lea eax,dword ptr ss:[ebp-38]
0058E185 push ecx
0058E186 push edx
0058E187 mov dword ptr ss:[ebp-C4],eax
0058E18D mov dword ptr ss:[ebp-CC],4008
0058E197 call dword ptr ds:[<&MSVBVM60.#617] ; MSVBVM60.rtcLeftCharVar，取最左侧字符
0058E19D push 40000000
0058E1A2 lea eax,dword ptr ss:[ebp-8C]
0058E1A8 push ebx
0058E1A9 lea ecx,dword ptr ss:[ebp-74]
0058E1AC push eax
0058E1AD push ecx
0058E1AE call dword ptr ds:[<&MSVBVM60.__vbaStr; MSVBVM60.__vbaStrVarVal
0058E1B4 push eax ; 此处取了"j"
0058E1B5 call dword ptr ds:[<&MSVBVM60.#696] ; MSVBVM60.rtcCharValueBstr，转ascII值,"6A"
0058E1BB movsx edx,ax
0058E1BE mov dword ptr ss:[ebp-11C],edx
0058E1C4 fild dword ptr ss:[ebp-11C] ；ascII转浮点值，"106"
0058E1CA fstp qword ptr ss:[ebp-124]
0058E1D0 mov eax,dword ptr ss:[ebp-120]
0058E1D6 mov ecx,dword ptr ss:[ebp-124]
0058E1DC push eax
0058E1DD push ecx
0058E1DE call dword ptr ds:[<&MSVBVM60.__vbaPowerR8> ;求"106"平方，11236
0058E1E4 fmul qword ptr ds:[4011C8] ；再乘以固定值1010323
0058E1EA mov ebx,dword ptr ds:[<&MSVBVM60.__vba; MSVBVM60.__vbaStrR8
0058E1F0 sub esp,8
0058E1F3 fstsw ax
0058E1F5 test al,0D
0058E1F7 jnz 神算超人.0058E85C
0058E1FD fstp qword ptr ss:[esp]
0058E200 call ebx ; <&MSVBVM60.__vbaStrR8>,浮点转字符串
0058E202 mov edx,eax ; eax为"11351989228"地址
0058E204 lea ecx,dword ptr ss:[ebp-78]
0058E207 call esi
0058E209 push eax
0058E20A call dword ptr ds:[<&MSVBVM60.#581] ; MSVBVM60.rtcR8ValFromBstr，转浮点数值
0058E210 mov edi,dword ptr ds:[<&MSVBVM60.__vba; MSVBVM60.__vbaVarMove
0058E216 lea edx,dword ptr ss:[ebp-DC]
0058E21C fstp qword ptr ss:[ebp-D4]
0058E222 lea ecx,dword ptr ss:[ebp-70]
0058E225 mov dword ptr ss:[ebp-DC],5
0058E22F call edi ; <&MSVBVM60.__vbaVarMove
0058E231 lea edx,dword ptr ss:[ebp-78]
0058E234 lea eax,dword ptr ss:[ebp-74]
0058E237 push edx
0058E238 push eax
0058E239 push 2
0058E23B call dword ptr ds:[<&MSVBVM60.__vbaFre; MSVBVM60.__vbaFreeStrList
0058E241 add esp,0C
0058E244 lea ecx,dword ptr ss:[ebp-8C]
0058E24A call dword ptr ds:[<&MSVBVM60.__vbaFre; MSVBVM60.__vbaFreeVar
0058E250 lea edx,dword ptr ss:[ebp-CC]
0058E256 push 1
0058E258 lea eax,dword ptr ss:[ebp-8C]
0058E25E lea ecx,dword ptr ss:[ebp-38]
0058E261 push edx
0058E262 push eax
0058E263 mov dword ptr ss:[ebp-C4],ecx
0058E269 mov dword ptr ss:[ebp-CC],4008
0058E273 call dword ptr ds:[<&MSVBVM60.#619] ;MSVBVM60.rtcRightCharVar，取最右侧字符
0058E279 push 40000000
0058E27E lea ecx,dword ptr ss:[ebp-8C]
0058E284 push 0
0058E286 lea edx,dword ptr ss:[ebp-74]
0058E289 push ecx
0058E28A push edx
0058E28B call dword ptr ds:[<&MSVBVM60.__vbaStr ;MSVBVM60.__vbaStrVarVal
0058E291 push eax ;这里是"y"的地址，而非sharpair所说取第二个字符
0058E292 call dword ptr ds:[<&MSVBVM60.#696] ; MSVBVM60.rtcCharValueBstr,转ascII，“79”
0058E298 movsx eax,ax ;ax=79
0058E29B mov dword ptr ss:[ebp-128],eax
0058E2A1 fild dword ptr ss:[ebp-128] ；ascII转浮点值，"121"
0058E2A7 fstp qword ptr ss:[ebp-130]
0058E2AD mov ecx,dword ptr ss:[ebp-12C]
0058E2B3 mov edx,dword ptr ss:[ebp-130]
0058E2B9 push ecx
0058E2BA push edx
0058E2BB call dword ptr ds:[<&MSVBVM60.__vbaPowerR8 ;求平方，121*121=14641
0058E2C1 fmul qword ptr ds:[4011C8] ；再乘以固定值1010323，结果为"14792139043"
0058E2C7 sub esp,8
0058E2CA fstsw ax
0058E2CC test al,0D
0058E2CE jnz 神算超人.0058E85C
0058E2D4 fstp qword ptr ss:[esp]
0058E2D7 call ebx
0058E2D9 mov edx,eax
0058E2DB lea ecx,dword ptr ss:[ebp-78]
0058E2DE call esi
0058E2E0 push eax
0058E2E1 call dword ptr ds:[<&MSVBVM60.#581] ; MSVBVM60.rtcR8ValFromBstr
0058E2E7 fstp qword ptr ss:[ebp-D4]
0058E2ED lea edx,dword ptr ss:[ebp-DC]
0058E2F3 lea ecx,dword ptr ss:[ebp-24]
0058E2F6 mov dword ptr ss:[ebp-DC],5
0058E300 call edi
0058E302 lea eax,dword ptr ss:[ebp-78]
0058E305 lea ecx,dword ptr ss:[ebp-74]
0058E308 push eax
0058E309 push ecx
0058E30A push 2
0058E30C call dword ptr ds:[<&MSVBVM60.__vbaFre; MSVBVM60.__vbaFreeStrList
0058E312 add esp,0C
0058E315 lea ecx,dword ptr ss:[ebp-8C]
0058E31B call dword ptr ds:[<&MSVBVM60.__vbaFre; MSVBVM60.__vbaFreeVar
0058E321 mov edx,dword ptr ss:[ebp-38]
0058E324 push edx
0058E325 call dword ptr ds:[<&MSVBVM60.__vbaLenBstr ; 取用户名长度
0058E32B push eax
0058E32C call dword ptr ds:[<&MSVBVM60.__vbaStr; MSVBVM60.__vbaStrI4
0058E332 mov edx,eax ;长度值为0x37，十进制为"7"的地址
0058E334 lea ecx,dword ptr ss:[ebp-74]
0058E337 call esi
0058E339 push eax
0058E33A call dword ptr ds:[<&MSVBVM60.#581] ; MSVBVM60.rtcR8ValFromBstr
0058E340 fstp qword ptr ss:[ebp-C4]
0058E346 lea edx,dword ptr ss:[ebp-CC]
0058E34C lea ecx,dword ptr ss:[ebp-34]
0058E34F mov dword ptr ss:[ebp-CC],5
0058E359 call edi
0058E35B lea ecx,dword ptr ss:[ebp-74]
0058E35E call dword ptr ds:[<&MSVBVM60.__vbaFre; MSVBVM60.__vbaFreeStr
0058E364 lea eax,dword ptr ss:[ebp-70]
0058E367 lea ecx,dword ptr ss:[ebp-24]
0058E36A push eax
0058E36B lea edx,dword ptr ss:[ebp-8C]
0058E371 push ecx
0058E372 push edx
0058E373 mov dword ptr ss:[ebp-C4],1
0058E37D mov dword ptr ss:[ebp-CC],2
0058E387 call dword ptr ds:[<&MSVBVM60.__vbaVarAdd> ;此处是上面"11351989228"和"14792139043"相
加，等于“26144128271”
0058E38D push eax
0058E38E lea eax,dword ptr ss:[ebp-34]
0058E391 lea ecx,dword ptr ss:[ebp-CC]
0058E397 push eax
0058E398 lea edx,dword ptr ss:[ebp-34]
0058E39B push ecx
0058E39C lea eax,dword ptr ss:[ebp-9C]
0058E3A2 push edx
0058E3A3 push eax
0058E3A4 call dword ptr ds:[<&MSVBVM60.__vbaVarDiv> ;此处用1除以用户名长度,1/7=0.1428571428571
0058E3AA lea ecx,dword ptr ss:[ebp-AC]
0058E3B0 push eax
0058E3B1 push ecx
0058E3B2 call dword ptr ds:[<&MSVBVM60.__vbaVarPow> ;此函数为求以x为底数，y为指数的幂，即x的y
次方；这里是用户名长度为底数，上面的商为指数，pow(7,1/7)=1.320469247754013669
0058E3B8 lea edx,dword ptr ss:[ebp-BC]
0058E3BE push eax
0058E3BF push edx
0058E3C0 call dword ptr ds:[<&MSVBVM60.__vbaVarMul> ; 1.320469247754013669乘以“26144128271”
，等于"34522517391.244100"
0058E3C6 mov edx,eax
0058E3C8 lea ecx,dword ptr ss:[ebp-50]
0058E3CB call edi
0058E3CD lea ecx,dword ptr ss:[ebp-8C]
0058E3D3 call dword ptr ds:[<&MSVBVM60.__vbaFre; MSVBVM60.__vbaFreeVar
0058E3D9 fld qword ptr ds:[4011C0] ; [4011C0]中固定值29.00000000
0058E3DF cmp dword ptr ds:[5C8000],0
0058E3E6 jnz short 神算超人.0058E3F0
0058E3E8 fdiv qword ptr ds:[4011B8] ; 29.00000000 除以[4011B8]中固定值28.00000000，
等于"1.03571428571428"
0058E3EE jmp short 神算超人.0058E401
0058E3F0 push dword ptr ds:[4011BC]
0058E3F6 push dword ptr ds:[4011B8]
0058E3FC call <jmp.&MSVBVM60._adj_fdiv_m64
0058E401 mov dword ptr ss:[ebp-CC],5
0058E40B fstp qword ptr ss:[ebp-C4]
0058E411 fstsw ax
0058E413 test al,0D
0058E415 jnz 神算超人.0058E85C
0058E41B lea eax,dword ptr ss:[ebp-50] ; "34522517391.244100"
0058E41E lea ecx,dword ptr ss:[ebp-CC] ; "1.03571428571428"
0058E424 push eax
0058E425 lea edx,dword ptr ss:[ebp-8C]
0058E42B push ecx
0058E42C push edx
0058E42D call dword ptr ds:[<&MSVBVM60.__vbaVarPow ;"34522517391.244100"的 "1.03571428571428"
次幂，“82122707487.8333673921”
0058E433 push eax
0058E434 call dword ptr ds:[<&MSVBVM60.__vbaR8V; MSVBVM60.__vbaR8Var
0058E43A sub esp,8
0058E43D fstp qword ptr ss:[esp]
0058E440 call dword ptr ds:[<&MSVBVM60.#614] ; MSVBVM60.rtcSqr，求平方根=286570.597738
0058E446 call dword ptr ds:[<&MSVBVM60.__vbaFPInt ;浮点转整数,"286570"
0058E44C sub esp,8
0058E44F fstp qword ptr ss:[esp]
0058E452 call ebx
0058E454 mov edx,eax
0058E456 lea ecx,dword ptr ss:[ebp-74]
0058E459 call esi
0058E45B push eax ;"286570"地址
0058E45C call dword ptr ds:[<&MSVBVM60.#581] ; MSVBVM60.rtcR8ValFromBstr
0058E462 fadd qword ptr ds:[4011B0] ;"286570"加固定值"6050218610",等于"6050505180"
0058E468 lea edx,dword ptr ss:[ebp-DC]
0058E46E lea ecx,dword ptr ss:[ebp-60]
0058E471 mov dword ptr ss:[ebp-DC],5
0058E47B fstp qword ptr ss:[ebp-D4]
0058E481 fstsw ax
0058E483 test al,0D
0058E485 jnz 神算超人.0058E85C
0058E48B call edi
0058E48D lea ecx,dword ptr ss:[ebp-74]
0058E490 call dword ptr ds:[<&MSVBVM60.__vbaFre; MSVBVM60.__vbaFreeStr
0058E496 lea eax,dword ptr ss:[ebp-60]
0058E499 push eax
0058E49A call dword ptr ds:[<&MSVBVM60.__vbaStr; MSVBVM60.__vbaStrVarCopy
0058E4A0 mov edx,eax ; 注册码"6050505180"地址
0058E4A2 lea ecx,dword ptr ss:[ebp-3C]
0058E4A5 call esi
0058E4A7 mov edi,dword ptr ss:[ebp+8]
0058E4AA xor ebx,ebx
0058E4AC jmp 神算超人.0058E595
0058E4B1 mov ecx,0A ；由 0058E16E跳转而来
0058E4B6 mov eax,80020004
0058E4BB mov dword ptr ss:[ebp-BC],ecx
0058E4C1 mov dword ptr ss:[ebp-AC],ecx
0058E4C7 mov dword ptr ss:[ebp-9C],ecx
0058E4CD lea edx,dword ptr ss:[ebp-CC]
0058E4D3 lea ecx,dword ptr ss:[ebp-8C]
0058E4D9 mov dword ptr ss:[ebp-B4],eax
0058E4DF mov dword ptr ss:[ebp-A4],eax
0058E4E5 mov dword ptr ss:[ebp-94],eax
0058E4EB mov dword ptr ss:[ebp-C4],神算超人.005719F
0058E4F5 mov dword ptr ss:[ebp-CC],8
0058E4FF call dword ptr ds:[<&MSVBVM60.__vbaVar; MSVBVM60.__vbaVarDup
0058E505 lea ecx,dword ptr ss:[ebp-BC]
0058E50B lea edx,dword ptr ss:[ebp-AC]
0058E511 push ecx
0058E512 lea eax,dword ptr ss:[ebp-9C]
0058E518 push edx
0058E519 push eax
0058E51A lea ecx,dword ptr ss:[ebp-8C]
0058E520 push 10
0058E522 push ecx
0058E523 call dword ptr ds:[<&MSVBVM60.#595] ; MSVBVM60.rtcMsgBox，显示没填用户名
.....................此处非关键代码省略
0058E595 mov eax,dword ptr ds:[edi] ；由0058E4AC跳转而来
0058E597 push edi
0058E598 call dword ptr ds:[eax+30C] ；这个Call并非sharpair所说那样。它是VB的内部调用，不必跟进
0058E59E lea ecx,dword ptr ss:[ebp-7C]
0058E5A1 push eax
0058E5A2 push ecx
0058E5A3 call dword ptr ds:[<&MSVBVM60.__vbaObj; MSVBVM60.__vbaObjSet
0058E5A9 mov esi,eax
0058E5AB lea eax,dword ptr ss:[ebp-74]
0058E5AE push eax
0058E5AF push esi
0058E5B0 mov edx,dword ptr ds:[esi]
0058E5B2 call dword ptr ds:[edx+A0]
0058E5B8 cmp eax,ebx
0058E5BA fclex
0058E5BC jge short 神算超人.0058E5D0
0058E5BE push 0A0
0058E5C3 push 神算超人.005719DC
0058E5C8 push esi
0058E5C9 push eax
0058E5CA call dword ptr ds:[<&MSVBVM60.__vbaHre; MSVBVM60.__vbaHresultCheckObj
0058E5D0 mov ecx,dword ptr ss:[ebp-74] ；假码“123456”
0058E5D3 mov edx,dword ptr ss:[ebp-3C] ；真码“6050505180”
0058E5D6 push ecx
0058E5D7 push edx
0058E5D8 call dword ptr ds:[<&MSVBVM60.__vbaStr; MSVBVM60.__vbaStrCmp
0058E5DE mov esi,eax
0058E5E0 lea ecx,dword ptr ss:[ebp-74]
0058E5E3 neg esi
0058E5E5 sbb esi,esi
0058E5E7 inc esi
0058E5E8 neg esi
0058E5EA call dword ptr ds:[<&MSVBVM60.__vbaFre; MSVBVM60.__vbaFreeStr
0058E5F0 lea ecx,dword ptr ss:[ebp-7C]
0058E5F3 call dword ptr ds:[<&MSVBVM60.__vbaFre; MSVBVM60.__vbaFreeObj
0058E5F9 mov eax,80020004
0058E5FE mov ecx,0A
0058E603 cmp si,bx
0058E606 mov dword ptr ss:[ebp-B4],eax
0058E60C mov dword ptr ss:[ebp-BC],ecx
0058E612 mov dword ptr ss:[ebp-A4],eax
0058E618 mov dword ptr ss:[ebp-AC],ecx
0058E61E je 神算超人.0058E71F ；跳走成功，否则失败
0058E624 mov esi,dword ptr ds:[<&MSVBVM60.__vba; MSVBVM60.__vbaVarDup
0058E62A lea edx,dword ptr ss:[ebp-DC]
0058E630 lea ecx,dword ptr ss:[ebp-9C]
0058E636 mov dword ptr ss:[ebp-D4],神算超人.00571A3
0058E640 mov dword ptr ss:[ebp-DC],8
0058E64A call esi ; <&MSVBVM60.__vbaVarDup
0058E64C lea edx,dword ptr ss:[ebp-CC]
0058E652 lea ecx,dword ptr ss:[ebp-8C]
0058E658 mov dword ptr ss:[ebp-C4],神算超人.00571A0
0058E662 mov dword ptr ss:[ebp-CC],8
0058E66C call esi
0058E66E lea eax,dword ptr ss:[ebp-BC]
0058E674 lea ecx,dword ptr ss:[ebp-AC]
0058E67A push eax
0058E67B lea edx,dword ptr ss:[ebp-9C]
0058E681 push ecx
0058E682 push edx
0058E683 lea eax,dword ptr ss:[ebp-8C]
0058E689 push 40
0058E68B push eax
0058E68C call dword ptr ds:[<&MSVBVM60.#595] ;MSVBVM60.rtcMsgBox，显示失败
0058E692 lea ecx,dword ptr ss:[ebp-BC]
0058E698 lea edx,dword ptr ss:[ebp-AC]
0058E69E push ecx
0058E69F lea eax,dword ptr ss:[ebp-9C]
0058E6A5 push edx
0058E6A6 lea ecx,dword ptr ss:[ebp-8C]
0058E6AC push eax
0058E6AD push ecx
0058E6AE push 4
0058E6B0 call dword ptr ds:[<&MSVBVM60.__vbaFre; MSVBVM60.__vbaFreeVarList
0058E6B6 mov eax,dword ptr ds:[5C8958]
0058E6BB add esp,14
0058E6BE cmp eax,ebx
0058E6C0 jnz short 神算超人.0058E6D2
0058E6C2 push 神算超人.005C8958
0058E6C7 push 神算超人.0057154C
0058E6CC call dword ptr ds:[<&MSVBVM60.__vbaNew; MSVBVM60.__vbaNew2
0058E6D2 mov esi,dword ptr ds:[5C8958]
0058E6D8 lea eax,dword ptr ss:[ebp-7C]
0058E6DB push edi
0058E6DC push eax
0058E6DD mov edx,dword ptr ds:[esi]
0058E6DF mov dword ptr ss:[ebp-134],edx
0058E6E5 call dword ptr ds:[<&MSVBVM60.__vbaObj; MSVBVM60.__vbaObjSetAddref
0058E6EB mov ecx,dword ptr ss:[ebp-134]
0058E6F1 push eax
0058E6F2 push esi
0058E6F3 call dword ptr ds:[ecx+10]
0058E6F6 cmp eax,ebx
0058E6F8 fclex
0058E6FA jge short 神算超人.0058E70B
0058E6FC push 10
0058E6FE push 神算超人.0057153C
0058E703 push esi
0058E704 push eax
0058E705 call dword ptr ds:[<&MSVBVM60.__vbaHre; MSVBVM60.__vbaHresultCheckObj
0058E70B lea ecx,dword ptr ss:[ebp-7C]
0058E70E call dword ptr ds:[<&MSVBVM60.__vbaFre; MSVBVM60.__vbaFreeObj
0058E714 call dword ptr ds:[<&MSVBVM60.__vbaEnd; MSVBVM60.__vbaEnd
0058E71A jmp 神算超人.0058E7B1
0058E71F mov esi,dword ptr ds:[<&MSVBVM60.__vba; MSVBVM60.__vbaVarDup
0058E725 mov edi,8
0058E72A lea edx,dword ptr ss:[ebp-DC]
0058E730 lea ecx,dword ptr ss:[ebp-9C]
0058E736 mov dword ptr ss:[ebp-D4],神算超人.00571A6
0058E740 mov dword ptr ss:[ebp-DC],edi
0058E746 call esi ; <&MSVBVM60.__vbaVarDup
0058E748 lea edx,dword ptr ss:[ebp-CC]
0058E74E lea ecx,dword ptr ss:[ebp-8C]
0058E754 mov dword ptr ss:[ebp-C4],神算超人.00571A4
0058E75E mov dword ptr ss:[ebp-CC],edi
0058E764 call esi
0058E766 lea edx,dword ptr ss:[ebp-BC]
0058E76C lea eax,dword ptr ss:[ebp-AC]
0058E772 push edx
0058E773 lea ecx,dword ptr ss:[ebp-9C]
0058E779 push eax
0058E77A push ecx
0058E77B lea edx,dword ptr ss:[ebp-8C]
0058E781 push 10
0058E783 push edx
0058E784 call dword ptr ds:[<&MSVBVM60.#595] ; MSVBVM60.rtcMsgBox，显示注册成功
0058E78A lea eax,dword ptr ss:[ebp-BC]
0058E790 lea ecx,dword ptr ss:[ebp-AC]
0058E796 push eax
0058E797 lea edx,dword ptr ss:[ebp-9C]
0058E79D push ecx
0058E79E lea eax,dword ptr ss:[ebp-8C]
0058E7A4 push edx
0058E7A5 push eax
0058E7A6 push 4
0058E7A8 call dword ptr ds:[<&MSVBVM60.__vbaFre; MSVBVM60.__vbaFreeVarList
0058E7AE add esp,14
0058E7B1 push 1
0058E7B3 call dword ptr ds:[<&MSVBVM60.__vbaFileClose> ; 关毕文件
0058E7B9 mov dword ptr ss:[ebp-4],ebx
0058E7BC wait
0058E7BD push 神算超人.0058E83D
0058E7C2 jmp short 神算超人.0058E808
...........以下代码省略
---------------------------------------------------------------------------------
【破解总结】
一、由于软件的作者是一名高三学生，，可能受高中数学影响较大，因此算法中运用了较多的求平方、幂、及平方根的计算。不过流程还是比较简单和清晰的。（我的个人观点）。
二、关于sharpair的分析
首先sharpair的分析思路是正确的，但正如其所说，其对于VB的rtcRightCharVar、_vbavarPow等内部函数没有完全理解，因此sharpair的算法结论“注册码和用户名第一、二位及用户名长度有关”并不完全正确。详细在上面的代码分析中已经作了解释。
三、算法思路：
1. 用户名的最左侧和最右侧，也就是第1个和最后一个的两个字符ascII值分别求平方并乘以1010323后相加；
2. 以用户名长度为底数，1除以用户名长度的值为指数，求幂；
3. 第1步中的值乘以第2步中的值；
4. 以第3步中的值为底数，以29除以28的值为指数，求幂；
5. 求第4步中的值的平方根；
6. 第5步中的平方根取整，与6050218610相加，结果为注册码。
【算法注册机】
/* Mathhero 3 c语言注册机 */
/* 在Turboc 2.0 下调试通过 */
#include "stdio.h"
#include "string.h"
#include "stdlib.h"
#include "math.h"
main()
{
char name[20],temp[30],*p;
int ndec=20;
long code;
float l,i=29.00000000,j=28.00000000;
double q=6050218610,c,m,k,t=1010323;
printf("Mathhero KeyGen by jackily 2005-1-30\n");
printf("Email:jackily_zhang@msn.com or [email]jackily_zhang@yahoo.com.cn[/email]\n");
printf("please input name:");
p=temp;
scanf("%s",name);
l=strlen(name);
m=name[0]*name[0];
m*=t;
t=m;
m=name[l-1]*name[l-1];
m*=1010323;
m+=t;
c=pow(l,1/l);
m*=c;
k=pow(m,i/j);
c=sqrt(k);
gcvt(c,ndec,p);
code=atol(p);
code+=q;
printf("\nYour register code is %lu",code);
}
--------------------------------------------------------------------------------
【用户名、密码】
用户名:jackily
SN :6050505180
--------------------------------------------------------------------------------
不足之处，欢迎各位指正！
jackily
二零零五年元月三十日
【版权声明】 本文纯属技术交流, 转载请注明作者并保持文章的完整, 谢谢!
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