五、实战篇
学习了前面的一些基础知识，这篇开始进入实战。挑选一个好的例子很难，我用VB写个Crackeme（见附件），这样可以自己控制让算法尽量多涉及几个知识面，因为短短的几篇文章想让一个没有编程基础的人马上学会写注册机确实很难，最主要的还是靠自己多写、多查、多问。这个Crackeme 有涉及逻辑算法，算术算法，MD5加密算法，字符串查找替换等方面，我们先进入算法分析。
很多人说VB的程序很难跟踪，其实主要是VB代码被反汇编后“垃圾代码”太多，再个就是VB中数据的存储格式和寻址方式比较特殊，动态调试时一般用DD EAX+8之类的就可以看到存储的数值信息。中断可以借用VB的资源编辑软件从字符串信息突破，不过这个Crackeme的字符串信息已经被我加密了，可以在函数__vbaVarTstEq上下断，另外，对VB的程序可以下万能断点 非常有效。还有就是多了解VB的内部函数，有时候看看它的函数就知道进行什么操作。下面是算法分析：
004037FE . FF15 4C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaHresultChe>; MSVBVM60.__vbaHresultCheckObj
00403804 > 8B45 98 MOV EAX,DWORD PTR SS:[EBP-68] ; 取邮箱名
00403807 . 50 PUSH EAX
00403808 . FF15 1C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaLenBstr>] ; 取长度
0040380E . 8BC8 MOV ECX,EAX ; 放入ECX
00403810 . FF15 CC104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaI2I4>] ; MSVBVM60.__vbaI2I4
00403816 . 8D4D 98 LEA ECX,DWORD PTR SS:[EBP-68]
00403819 . 8985 98FEFFFF MOV DWORD PTR SS:[EBP-168],EAX ; 邮箱长度
0040381F . BB 01000000 MOV EBX,1 ; EBX赋值1
00403824 . FF15 98114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeStr>] ; MSVBVM60.__vbaFreeStr
0040382A . 8D4D 88 LEA ECX,DWORD PTR SS:[EBP-78]
0040382D . FF15 9C114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeObj>] ; MSVBVM60.__vbaFreeObj
00403833 > 66:3B9D 98FEF>CMP BX,WORD PTR SS:[EBP-168] ; 循环开始，对比邮箱位数是否取完
0040383A . 0F8F 6D010000 JG crackeme.004039AD ; 如果取完就跳走，否则继续循环
00403840 . 8B0F MOV ECX,DWORD PTR DS:[EDI]
00403842 . 57 PUSH EDI
00403843 . FF91 08030000 CALL DWORD PTR DS:[ECX+308]
00403849 . 8D55 88 LEA EDX,DWORD PTR SS:[EBP-78]
0040384C . 50 PUSH EAX
0040384D . 52 PUSH EDX
0040384E . FF15 7C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaObjSet>] ; MSVBVM60.__vbaObjSet
00403854 . 8B08 MOV ECX,DWORD PTR DS:[EAX]
00403856 . 8D55 98 LEA EDX,DWORD PTR SS:[EBP-68]
00403859 . 52 PUSH EDX
0040385A . 50 PUSH EAX
0040385B . 8985 B0FEFFFF MOV DWORD PTR SS:[EBP-150],EAX
00403861 . FF91 A0000000 CALL DWORD PTR DS:[ECX+A0]
00403867 . 3BC6 CMP EAX,ESI
00403869 . DBE2 FCLEX
0040386B . 7D 18 JGE SHORT crackeme.00403885
0040386D . 8B8D B0FEFFFF MOV ECX,DWORD PTR SS:[EBP-150]
00403873 . 68 A0000000 PUSH 0A0
00403878 . 68 B8294000 PUSH crackeme.004029B8
0040387D . 51 PUSH ECX
0040387E . 50 PUSH EAX
0040387F . FF15 4C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaHresultChe>; MSVBVM60.__vbaHresultCheckObj
00403885 > 8B45 98 MOV EAX,DWORD PTR SS:[EBP-68] ; 邮箱名
00403888 . 8D95 64FFFFFF LEA EDX,DWORD PTR SS:[EBP-9C]
0040388E . 8985 7CFFFFFF MOV DWORD PTR SS:[EBP-84],EAX ; 邮箱名
00403894 . 52 PUSH EDX
00403895 . 0FBFC3 MOVSX EAX,BX ; 位数递增
00403898 . 8D8D 74FFFFFF LEA ECX,DWORD PTR SS:[EBP-8C]
0040389E . 50 PUSH EAX
0040389F . 8D95 54FFFFFF LEA EDX,DWORD PTR SS:[EBP-AC]
004038A5 . 51 PUSH ECX
004038A6 . 52 PUSH EDX
004038A7 . C785 6CFFFFFF>MOV DWORD PTR SS:[EBP-94],1
004038B1 . C785 64FFFFFF>MOV DWORD PTR SS:[EBP-9C],2
004038BB . 8975 98 MOV DWORD PTR SS:[EBP-68],ESI
004038BE . C785 74FFFFFF>MOV DWORD PTR SS:[EBP-8C],8
004038C8 . FF15 B0104000 CALL DWORD PTR DS:[<&MSVBVM60.#632>] ; MSVBVM60.rtcMidCharVar
004038CE . 8D85 54FFFFFF LEA EAX,DWORD PTR SS:[EBP-AC]
004038D4 . 8D4D 94 LEA ECX,DWORD PTR SS:[EBP-6C]
004038D7 . 50 PUSH EAX
004038D8 . 51 PUSH ECX
004038D9 . FF15 10114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaStrVarVal>>; MSVBVM60.__vbaStrVarVal
004038DF . 50 PUSH EAX
004038E0 . FF15 34104000 CALL DWORD PTR DS:[<&MSVBVM60.#516>] ; MSVBVM60.rtcAnsiValueBstr
004038E6 . 0FBFD0 MOVSX EDX,AX ; 逐个取邮箱名的ASCII
004038E9 . 8B07 MOV EAX,DWORD PTR DS:[EDI]
004038EB . 8D8D B4FEFFFF LEA ECX,DWORD PTR SS:[EBP-14C]
004038F1 . 8995 B8FEFFFF MOV DWORD PTR SS:[EBP-148],EDX ; 邮箱名的ASCII
004038F7 . 51 PUSH ECX
004038F8 . 8D95 C0FEFFFF LEA EDX,DWORD PTR SS:[EBP-140]
004038FE . 8D8D B8FEFFFF LEA ECX,DWORD PTR SS:[EBP-148]
00403904 . 52 PUSH EDX
00403905 . 51 PUSH ECX
00403906 . 57 PUSH EDI
00403907 C785 C0FEFFFF>MOV DWORD PTR SS:[EBP-140],2 ; 将2赋值给段寄存器SS:[EBP-140]
00403911 . FF90 04070000 CALL DWORD PTR DS:[EAX+704] ; 自定义异或函数
00403917 . 3BC6 CMP EAX,ESI
00403919 . 7D 12 JGE SHORT crackeme.0040392D
0040391B . 68 04070000 PUSH 704
00403920 . 68 C4264000 PUSH crackeme.004026C4
00403925 . 57 PUSH EDI
00403926 . 50 PUSH EAX
00403927 . FF15 4C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaHresultChe>; MSVBVM60.__vbaHresultCheckObj
0040392D > 8B95 B4FEFFFF MOV EDX,DWORD PTR SS:[EBP-14C] ; 取异或2后的值
00403933 . 8D45 C0 LEA EAX,DWORD PTR SS:[EBP-40]
00403936 . 8995 0CFFFFFF MOV DWORD PTR SS:[EBP-F4],EDX ; 异或2后的值
0040393C . 8D8D 04FFFFFF LEA ECX,DWORD PTR SS:[EBP-FC]
00403942 . 50 PUSH EAX
00403943 . 8D95 44FFFFFF LEA EDX,DWORD PTR SS:[EBP-BC]
00403949 . 51 PUSH ECX ; 异或2后的结果
0040394A . 52 PUSH EDX
0040394B . C785 04FFFFFF>MOV DWORD PTR SS:[EBP-FC],3
00403955 . FF15 58114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaVarAdd>] ; MSVBVM60.__vbaVarAdd
0040395B . 8BD0 MOV EDX,EAX ; 累加
0040395D . 8D4D C0 LEA ECX,DWORD PTR SS:[EBP-40]
00403960 . FF15 10104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaVarMove>] ; MSVBVM60.__vbaVarMove
00403966 . 8D4D 94 LEA ECX,DWORD PTR SS:[EBP-6C]
00403969 . FF15 98114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeStr>] ; MSVBVM60.__vbaFreeStr
0040396F . 8D4D 88 LEA ECX,DWORD PTR SS:[EBP-78]
00403972 . FF15 9C114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeObj>] ; MSVBVM60.__vbaFreeObj
00403978 . 8D85 54FFFFFF LEA EAX,DWORD PTR SS:[EBP-AC]
0040397E . 8D8D 64FFFFFF LEA ECX,DWORD PTR SS:[EBP-9C]
00403984 . 50 PUSH EAX
00403985 . 8D95 74FFFFFF LEA EDX,DWORD PTR SS:[EBP-8C]
0040398B . 51 PUSH ECX
0040398C . 52 PUSH EDX
0040398D . 6A 03 PUSH 3
0040398F . FF15 28104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeVarLis>; MSVBVM60.__vbaFreeVarList
00403995 . B8 01000000 MOV EAX,1
0040399A . 83C4 10 ADD ESP,10
0040399D . 66:03C3 ADD AX,BX
004039A0 . 0F80 7E080000 JO crackeme.00404224
004039A6 . 8BD8 MOV EBX,EAX
004039A8 .^ E9 86FEFFFF JMP crackeme.00403833 ; 继续循环
004039AD > 8B07 MOV EAX,DWORD PTR DS:[EDI]
004039AF . 57 PUSH EDI
004039B0 . FF90 10030000 CALL DWORD PTR DS:[EAX+310]
004039B6 . 8D4D 88 LEA ECX,DWORD PTR SS:[EBP-78]
004039B9 . 50 PUSH EAX
004039BA . 51 PUSH ECX
004039BB . FF15 7C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaObjSet>] ; MSVBVM60.__vbaObjSet
004039C1 . 8BD8 MOV EBX,EAX
004039C3 . 8D45 98 LEA EAX,DWORD PTR SS:[EBP-68]
004039C6 . 50 PUSH EAX
004039C7 . 53 PUSH EBX
004039C8 . 8B13 MOV EDX,DWORD PTR DS:[EBX]
004039CA . FF92 A0000000 CALL DWORD PTR DS:[EDX+A0]
004039D0 . 3BC6 CMP EAX,ESI
004039D2 . DBE2 FCLEX
004039D4 . 7D 12 JGE SHORT crackeme.004039E8
004039D6 . 68 A0000000 PUSH 0A0
004039DB . 68 B8294000 PUSH crackeme.004029B8
004039E0 . 53 PUSH EBX
004039E1 . 50 PUSH EAX
004039E2 . FF15 4C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaHresultChe>; MSVBVM60.__vbaHresultCheckObj
004039E8 > 8B4D 98 MOV ECX,DWORD PTR SS:[EBP-68] ; 取机器码
004039EB . 51 PUSH ECX
004039EC . FF15 1C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaLenBstr>] ; MSVBVM60.__vbaLenBstr
004039F2 . 8BC8 MOV ECX,EAX ; 机器码长度
004039F4 . FF15 CC104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaI2I4>] ; MSVBVM60.__vbaI2I4
004039FA . 8D4D 98 LEA ECX,DWORD PTR SS:[EBP-68]
004039FD . 8985 90FEFFFF MOV DWORD PTR SS:[EBP-170],EAX ; 机器码长度
00403A03 . BB 01000000 MOV EBX,1
00403A08 . FF15 98114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeStr>] ; MSVBVM60.__vbaFreeStr
00403A0E . 8D4D 88 LEA ECX,DWORD PTR SS:[EBP-78]
00403A11 . FF15 9C114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeObj>] ; MSVBVM60.__vbaFreeObj
00403A17 > 66:3B9D 90FEF>CMP BX,WORD PTR SS:[EBP-170] ; 循环开始，机器码是否取完
00403A1E . 0F8F 33010000 JG crackeme.00403B57 ; 没有则继续循环
00403A24 . 8B17 MOV EDX,DWORD PTR DS:[EDI]
00403A26 . 57 PUSH EDI
00403A27 . FF92 10030000 CALL DWORD PTR DS:[EDX+310]
00403A2D . 50 PUSH EAX
00403A2E . 8D45 88 LEA EAX,DWORD PTR SS:[EBP-78]
00403A31 . 50 PUSH EAX
00403A32 . FF15 7C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaObjSet>] ; MSVBVM60.__vbaObjSet
00403A38 . 8B08 MOV ECX,DWORD PTR DS:[EAX]
00403A3A . 8D55 98 LEA EDX,DWORD PTR SS:[EBP-68]
00403A3D . 52 PUSH EDX
00403A3E . 50 PUSH EAX
00403A3F . 8985 B0FEFFFF MOV DWORD PTR SS:[EBP-150],EAX
00403A45 . FF91 A0000000 CALL DWORD PTR DS:[ECX+A0]
00403A4B . 3BC6 CMP EAX,ESI
00403A4D . DBE2 FCLEX
00403A4F . 7D 18 JGE SHORT crackeme.00403A69
00403A51 . 8B8D B0FEFFFF MOV ECX,DWORD PTR SS:[EBP-150]
00403A57 . 68 A0000000 PUSH 0A0
00403A5C . 68 B8294000 PUSH crackeme.004029B8
00403A61 . 51 PUSH ECX
00403A62 . 50 PUSH EAX
00403A63 . FF15 4C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaHresultChe>; MSVBVM60.__vbaHresultCheckObj
00403A69 > 8B45 98 MOV EAX,DWORD PTR SS:[EBP-68] ; 机器码
00403A6C . 8D95 64FFFFFF LEA EDX,DWORD PTR SS:[EBP-9C]
00403A72 . 8985 7CFFFFFF MOV DWORD PTR SS:[EBP-84],EAX ; 机器码
00403A78 . 52 PUSH EDX
00403A79 . 0FBFC3 MOVSX EAX,BX ; 逐个统计机器码位数
00403A7C . 8D8D 74FFFFFF LEA ECX,DWORD PTR SS:[EBP-8C]
00403A82 . 50 PUSH EAX
00403A83 . 8D95 54FFFFFF LEA EDX,DWORD PTR SS:[EBP-AC]
00403A89 . 51 PUSH ECX
00403A8A . 52 PUSH EDX
00403A8B . C785 6CFFFFFF>MOV DWORD PTR SS:[EBP-94],1
00403A95 . C785 64FFFFFF>MOV DWORD PTR SS:[EBP-9C],2
00403A9F . 8975 98 MOV DWORD PTR SS:[EBP-68],ESI
00403AA2 . C785 74FFFFFF>MOV DWORD PTR SS:[EBP-8C],8
00403AAC . FF15 B0104000 CALL DWORD PTR DS:[<&MSVBVM60.#632>] ; MSVBVM60.rtcMidCharVar
00403AB2 . 8D85 54FFFFFF LEA EAX,DWORD PTR SS:[EBP-AC]
00403AB8 . 8D4D 94 LEA ECX,DWORD PTR SS:[EBP-6C]
00403ABB . 50 PUSH EAX
00403ABC . 51 PUSH ECX
00403ABD . FF15 10114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaStrVarVal>>; MSVBVM60.__vbaStrVarVal
00403AC3 . 50 PUSH EAX
00403AC4 . FF15 34104000 CALL DWORD PTR DS:[<&MSVBVM60.#516>] ; MSVBVM60.rtcAnsiValueBstr
00403ACA . 66:8985 0CFFF>MOV WORD PTR SS:[EBP-F4],AX ; 逐个取机器码的ASCII码
00403AD1 . 8D55 D8 LEA EDX,DWORD PTR SS:[EBP-28]
00403AD4 . 8D85 04FFFFFF LEA EAX,DWORD PTR SS:[EBP-FC]
00403ADA . 52 PUSH EDX
00403ADB . 8D4D C0 LEA ECX,DWORD PTR SS:[EBP-40]
00403ADE . 50 PUSH EAX ; 机器码的ASCII码
00403ADF . 8D95 44FFFFFF LEA EDX,DWORD PTR SS:[EBP-BC]
00403AE5 . 51 PUSH ECX ; 刚才邮箱名的计算结果
00403AE6 . 52 PUSH EDX
00403AE7 . C785 04FFFFFF>MOV DWORD PTR SS:[EBP-FC],2
00403AF1 . FF15 5C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaVarXor>] ; MSVBVM60.__vbaVarXor
00403AF7 . 50 PUSH EAX ; 异或的结果
00403AF8 . 8D85 34FFFFFF LEA EAX,DWORD PTR SS:[EBP-CC]
00403AFE . 50 PUSH EAX
00403AFF . FF15 58114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaVarAdd>] ; MSVBVM60.__vbaVarAdd
00403B05 . 8BD0 MOV EDX,EAX ; 累加
00403B07 . 8D4D D8 LEA ECX,DWORD PTR SS:[EBP-28]
00403B0A . FF15 10104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaVarMove>] ; MSVBVM60.__vbaVarMove
00403B10 . 8D4D 94 LEA ECX,DWORD PTR SS:[EBP-6C]
00403B13 . FF15 98114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeStr>] ; MSVBVM60.__vbaFreeStr
00403B19 . 8D4D 88 LEA ECX,DWORD PTR SS:[EBP-78]
00403B1C . FF15 9C114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeObj>] ; MSVBVM60.__vbaFreeObj
00403B22 . 8D8D 54FFFFFF LEA ECX,DWORD PTR SS:[EBP-AC]
00403B28 . 8D95 64FFFFFF LEA EDX,DWORD PTR SS:[EBP-9C]
00403B2E . 51 PUSH ECX
00403B2F . 8D85 74FFFFFF LEA EAX,DWORD PTR SS:[EBP-8C]
00403B35 . 52 PUSH EDX
00403B36 . 50 PUSH EAX
00403B37 . 6A 03 PUSH 3
00403B39 . FF15 28104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeVarLis>; MSVBVM60.__vbaFreeVarList
00403B3F . B8 01000000 MOV EAX,1
00403B44 . 83C4 10 ADD ESP,10
00403B47 . 66:03C3 ADD AX,BX
00403B4A . 0F80 D4060000 JO crackeme.00404224
00403B50 . 8BD8 MOV EBX,EAX
00403B52 .^ E9 C0FEFFFF JMP crackeme.00403A17
00403B57 > 8B0F MOV ECX,DWORD PTR DS:[EDI]
00403B59 . 57 PUSH EDI
00403B5A . FF91 0C030000 CALL DWORD PTR DS:[ECX+30C]
00403B60 . 8D55 88 LEA EDX,DWORD PTR SS:[EBP-78]
00403B63 . 50 PUSH EAX
00403B64 . 52 PUSH EDX
00403B65 . FF15 7C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaObjSet>] ; MSVBVM60.__vbaObjSet
00403B6B . 8BD8 MOV EBX,EAX
00403B6D . 8D4D 98 LEA ECX,DWORD PTR SS:[EBP-68]
00403B70 . 51 PUSH ECX
00403B71 . 53 PUSH EBX
00403B72 . 8B03 MOV EAX,DWORD PTR DS:[EBX]
00403B74 . FF90 A0000000 CALL DWORD PTR DS:[EAX+A0]
00403B7A . 3BC6 CMP EAX,ESI
00403B7C . DBE2 FCLEX
00403B7E . 7D 12 JGE SHORT crackeme.00403B92
00403B80 . 68 A0000000 PUSH 0A0
00403B85 . 68 B8294000 PUSH crackeme.004029B8
00403B8A . 53 PUSH EBX
00403B8B . 50 PUSH EAX
00403B8C . FF15 4C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaHresultChe>; MSVBVM60.__vbaHresultCheckObj
00403B92 > 8B45 98 MOV EAX,DWORD PTR SS:[EBP-68] ; 取出用户名
00403B95 . 8D95 64FFFFFF LEA EDX,DWORD PTR SS:[EBP-9C]
00403B9B . 8985 7CFFFFFF MOV DWORD PTR SS:[EBP-84],EAX ; 用户名
00403BA1 . 8D85 74FFFFFF LEA EAX,DWORD PTR SS:[EBP-8C]
00403BA7 . 52 PUSH EDX
00403BA8 . 8D8D 54FFFFFF LEA ECX,DWORD PTR SS:[EBP-AC]
00403BAE . BB 08000000 MOV EBX,8
00403BB3 . 50 PUSH EAX ; 用户名
00403BB4 . 51 PUSH ECX
00403BB5 . C785 6CFFFFFF>MOV DWORD PTR SS:[EBP-94],10
00403BBF . C785 64FFFFFF>MOV DWORD PTR SS:[EBP-9C],2
00403BC9 . 8975 98 MOV DWORD PTR SS:[EBP-68],ESI
00403BCC . 899D 74FFFFFF MOV DWORD PTR SS:[EBP-8C],EBX
00403BD2 . E8 C92B0000 CALL crackeme.004067A0 ; 求MD5值
00403BD7 . 8D95 54FFFFFF LEA EDX,DWORD PTR SS:[EBP-AC]
00403BDD . 8D85 44FFFFFF LEA EAX,DWORD PTR SS:[EBP-BC]
00403BE3 . 52 PUSH EDX ; 16位的MD5结果
00403BE4 . 50 PUSH EAX
00403BE5 . FF15 C0104000 CALL DWORD PTR DS:[<&MSVBVM60.#528>] ; MSVBVM60.rtcUpperCaseVar
00403BEB . 8D8D 44FFFFFF LEA ECX,DWORD PTR SS:[EBP-BC] ; 转成大写
00403BF1 . 51 PUSH ECX
00403BF2 . FF15 20104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaStrVarMove>; MSVBVM60.__vbaStrVarMove
00403BF8 . 8BD0 MOV EDX,EAX ; 转大写后的结果
00403BFA . 8D4D B0 LEA ECX,DWORD PTR SS:[EBP-50]
00403BFD . FF15 78114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaStrMove>] ; MSVBVM60.__vbaStrMove
00403C03 . 8D4D 88 LEA ECX,DWORD PTR SS:[EBP-78]
00403C06 . FF15 9C114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeObj>] ; MSVBVM60.__vbaFreeObj
00403C0C . 8D95 44FFFFFF LEA EDX,DWORD PTR SS:[EBP-BC]
00403C12 . 8D85 54FFFFFF LEA EAX,DWORD PTR SS:[EBP-AC]
00403C18 . 52 PUSH EDX ; 转大写后的结果
00403C19 . 8D8D 64FFFFFF LEA ECX,DWORD PTR SS:[EBP-9C]
00403C1F . 50 PUSH EAX
00403C20 . 8D95 74FFFFFF LEA EDX,DWORD PTR SS:[EBP-8C]
00403C26 . 51 PUSH ECX
00403C27 . 52 PUSH EDX
00403C28 . 6A 04 PUSH 4
00403C2A . FF15 28104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeVarLis>; MSVBVM60.__vbaFreeVarList
00403C30 . B8 02000000 MOV EAX,2 ; EAX赋值2
00403C35 . 83C4 14 ADD ESP,14
00403C38 . 8985 1CFFFFFF MOV DWORD PTR SS:[EBP-E4],EAX ; 2
00403C3E . 8985 14FFFFFF MOV DWORD PTR SS:[EBP-EC],EAX ; 2
00403C44 . 8D45 D8 LEA EAX,DWORD PTR SS:[EBP-28]
00403C47 . 8D8D 14FFFFFF LEA ECX,DWORD PTR SS:[EBP-EC]
00403C4D . 50 PUSH EAX ; 机器码计算结果
00403C4E . 8D95 74FFFFFF LEA EDX,DWORD PTR SS:[EBP-8C]
00403C54 . 51 PUSH ECX ; 2
00403C55 . 52 PUSH EDX
00403C56 . 89B5 0CFFFFFF MOV DWORD PTR SS:[EBP-F4],ESI
00403C5C . C785 04FFFFFF>MOV DWORD PTR SS:[EBP-FC],8002
00403C66 . FF15 64114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaVarMod>] ; MSVBVM60.__vbaVarMod
00403C6C . 50 PUSH EAX ; 除2的余数
00403C6D . 8D85 04FFFFFF LEA EAX,DWORD PTR SS:[EBP-FC]
00403C73 . 50 PUSH EAX ; 与0对比
00403C74 . FF15 C8104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaVarTstEq>] ; 调用vbaVarTstEq
00403C7A . 66:85C0 TEST AX,AX ; 如果返回非0说明相等，如果是0结果说明不等
00403C7D 74 7A JE SHORT crackeme.00403CF9
00403C7F . 8D4D B0 LEA ECX,DWORD PTR SS:[EBP-50]
00403C82 . 8D95 74FFFFFF LEA EDX,DWORD PTR SS:[EBP-8C]
00403C88 . 898D 1CFFFFFF MOV DWORD PTR SS:[EBP-E4],ECX
00403C8E . 52 PUSH EDX
00403C8F . 8D85 14FFFFFF LEA EAX,DWORD PTR SS:[EBP-EC]
00403C95 . 6A 05 PUSH 5 ; 5
00403C97 . 8D8D 64FFFFFF LEA ECX,DWORD PTR SS:[EBP-9C]
00403C9D . 50 PUSH EAX ; 取出用户名的MD5值
00403C9E . 51 PUSH ECX
00403C9F . C785 7CFFFFFF>MOV DWORD PTR SS:[EBP-84],5 ; 5
00403CA9 . C785 74FFFFFF>MOV DWORD PTR SS:[EBP-8C],2
00403CB3 . C785 14FFFFFF>MOV DWORD PTR SS:[EBP-EC],4008
00403CBD . FF15 B0104000 CALL DWORD PTR DS:[<&MSVBVM60.#632>] ; MSVBVM60.rtcMidCharVar
00403CC3 . 8D95 64FFFFFF LEA EDX,DWORD PTR SS:[EBP-9C] ; 从第5位开始取5位
00403CC9 . 52 PUSH EDX
00403CCA . FF15 20104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaStrVarMove>; MSVBVM60.__vbaStrVarMove
00403CD0 . 8BD0 MOV EDX,EAX ; 5位结果
00403CD2 . 8D4D D4 LEA ECX,DWORD PTR SS:[EBP-2C]
00403CD5 . FF15 78114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaStrMove>] ; MSVBVM60.__vbaStrMove
00403CDB . 8D85 64FFFFFF LEA EAX,DWORD PTR SS:[EBP-9C]
00403CE1 . 8D8D 74FFFFFF LEA ECX,DWORD PTR SS:[EBP-8C]
00403CE7 . 50 PUSH EAX
00403CE8 . 51 PUSH ECX
00403CE9 . 6A 02 PUSH 2
00403CEB . FF15 28104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeVarLis>; MSVBVM60.__vbaFreeVarList
00403CF1 . 83C4 0C ADD ESP,0C
00403CF4 E9 60010000 JMP crackeme.00403E59
00403CF9 > BB 01000000 MOV EBX,1 ; 1
00403CFE > B8 05000000 MOV EAX,5 ; 5
00403D03 . 66:3BD8 CMP BX,AX ; 5位是否取完
00403D06 . 0F8F 48010000 JG crackeme.00403E54 ; 循环开始
00403D0C . 8D55 B0 LEA EDX,DWORD PTR SS:[EBP-50]
00403D0F . 8D85 74FFFFFF LEA EAX,DWORD PTR SS:[EBP-8C]
00403D15 . 0FBFCB MOVSX ECX,BX
00403D18 . 8995 1CFFFFFF MOV DWORD PTR SS:[EBP-E4],EDX
00403D1E . 50 PUSH EAX
00403D1F . 8D95 14FFFFFF LEA EDX,DWORD PTR SS:[EBP-EC]
00403D25 . 51 PUSH ECX
00403D26 . 8D85 64FFFFFF LEA EAX,DWORD PTR SS:[EBP-9C]
00403D2C . 52 PUSH EDX
00403D2D . 50 PUSH EAX
00403D2E . C785 7CFFFFFF>MOV DWORD PTR SS:[EBP-84],1
00403D38 . C785 74FFFFFF>MOV DWORD PTR SS:[EBP-8C],2
00403D42 . C785 14FFFFFF>MOV DWORD PTR SS:[EBP-EC],4008
00403D4C . FF15 B0104000 CALL DWORD PTR DS:[<&MSVBVM60.#632>] ; MSVBVM60.rtcMidCharVar
00403D52 . 8B4D D4 MOV ECX,DWORD PTR SS:[EBP-2C]
00403D55 . 8B55 B4 MOV EDX,DWORD PTR SS:[EBP-4C] ; 字符串1
00403D58 . B8 08000000 MOV EAX,8
00403D5D . 898D CCFEFFFF MOV DWORD PTR SS:[EBP-134],ECX
00403D63 . 8985 C4FEFFFF MOV DWORD PTR SS:[EBP-13C],EAX
00403D69 . 8985 F4FEFFFF MOV DWORD PTR SS:[EBP-10C],EAX
00403D6F . 8D45 AC LEA EAX,DWORD PTR SS:[EBP-54]
00403D72 . 8D8D 44FFFFFF LEA ECX,DWORD PTR SS:[EBP-BC]
00403D78 . 8995 FCFEFFFF MOV DWORD PTR SS:[EBP-104],EDX ; 字符串1
00403D7E . 8985 ECFEFFFF MOV DWORD PTR SS:[EBP-114],EAX ; 字符串1
00403D84 . 51 PUSH ECX ; MD5值
00403D85 . 8D95 F4FEFFFF LEA EDX,DWORD PTR SS:[EBP-10C]
00403D8B . 6A 01 PUSH 1 ; 1
00403D8D . 8D85 64FFFFFF LEA EAX,DWORD PTR SS:[EBP-9C]
00403D93 . 52 PUSH EDX ; 字符串1
00403D94 . 50 PUSH EAX
00403D95 . 8D8D 54FFFFFF LEA ECX,DWORD PTR SS:[EBP-AC]
00403D9B . 56 PUSH ESI
00403D9C . 51 PUSH ECX
00403D9D . C785 4CFFFFFF>MOV DWORD PTR SS:[EBP-B4],1
00403DA7 . C785 44FFFFFF>MOV DWORD PTR SS:[EBP-BC],2
00403DB1 . C785 E4FEFFFF>MOV DWORD PTR SS:[EBP-11C],4008
00403DBB . FF15 08114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaInStrVar>] ; MSVBVM60.__vbaInStrVar
00403DC1 . 50 PUSH EAX ; 从字符串1中逐个查找相应的位置
00403DC2 . FF15 54114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaI4Var>] ; MSVBVM60.__vbaI4Var
00403DC8 . 50 PUSH EAX ; 字符串1中的位置数
00403DC9 . 8D95 E4FEFFFF LEA EDX,DWORD PTR SS:[EBP-11C]
00403DCF . 8D85 34FFFFFF LEA EAX,DWORD PTR SS:[EBP-CC]
00403DD5 . 52 PUSH EDX ; 字符串2
00403DD6 . 50 PUSH EAX
00403DD7 . FF15 B0104000 CALL DWORD PTR DS:[<&MSVBVM60.#632>] ; MSVBVM60.rtcMidCharVar
00403DDD . 8D8D C4FEFFFF LEA ECX,DWORD PTR SS:[EBP-13C] ; 字符串2中查找相应位置
00403DE3 . 8D95 34FFFFFF LEA EDX,DWORD PTR SS:[EBP-CC]
00403DE9 . 51 PUSH ECX
00403DEA . 8D85 24FFFFFF LEA EAX,DWORD PTR SS:[EBP-DC]
00403DF0 . 52 PUSH EDX
00403DF1 . 50 PUSH EAX
00403DF2 . FF15 14114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaVarCat>] ; MSVBVM60.__vbaVarCat
00403DF8 . 50 PUSH EAX ; 连接各个找出的位置数
00403DF9 . FF15 20104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaStrVarMove>; MSVBVM60.__vbaStrVarMove
00403DFF . 8BD0 MOV EDX,EAX
00403E01 . 8D4D D4 LEA ECX,DWORD PTR SS:[EBP-2C]
00403E04 . FF15 78114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaStrMove>] ; MSVBVM60.__vbaStrMove
00403E0A . 8D8D 24FFFFFF LEA ECX,DWORD PTR SS:[EBP-DC]
00403E10 . 8D95 34FFFFFF LEA EDX,DWORD PTR SS:[EBP-CC]
00403E16 . 51 PUSH ECX
00403E17 . 8D85 44FFFFFF LEA EAX,DWORD PTR SS:[EBP-BC]
00403E1D . 52 PUSH EDX
00403E1E . 8D8D 54FFFFFF LEA ECX,DWORD PTR SS:[EBP-AC]
00403E24 . 50 PUSH EAX
00403E25 . 8D95 64FFFFFF LEA EDX,DWORD PTR SS:[EBP-9C]
00403E2B . 51 PUSH ECX
00403E2C . 8D85 74FFFFFF LEA EAX,DWORD PTR SS:[EBP-8C]
00403E32 . 52 PUSH EDX
00403E33 . 50 PUSH EAX
00403E34 . 6A 06 PUSH 6
00403E36 . FF15 28104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeVarLis>; MSVBVM60.__vbaFreeVarList
00403E3C . B8 01000000 MOV EAX,1
00403E41 . 83C4 1C ADD ESP,1C
00403E44 . 66:03C3 ADD AX,BX
00403E47 . 0F80 D7030000 JO crackeme.00404224
00403E4D . 8BD8 MOV EBX,EAX
00403E4F .^ E9 AAFEFFFF JMP crackeme.00403CFE ; 循环
00403E54 > BB 08000000 MOV EBX,8
00403E59 > 8B4D D4 MOV ECX,DWORD PTR SS:[EBP-2C] ; 对应的结果
00403E5C . B8 882A4000 MOV EAX,crackeme.00402A88
00403E61 . 8985 1CFFFFFF MOV DWORD PTR SS:[EBP-E4],EAX
00403E67 . 8985 FCFEFFFF MOV DWORD PTR SS:[EBP-104],EAX
00403E6D . 898D 0CFFFFFF MOV DWORD PTR SS:[EBP-F4],ECX
00403E73 . 8D85 E4FEFFFF LEA EAX,DWORD PTR SS:[EBP-11C]
00403E79 . 6A 04 PUSH 4 ; 4
00403E7B . 8D8D 34FFFFFF LEA ECX,DWORD PTR SS:[EBP-CC]
00403E81 . 8D55 B0 LEA EDX,DWORD PTR SS:[EBP-50]
00403E84 . 50 PUSH EAX ; MD5值
00403E85 . 51 PUSH ECX
00403E86 . 899D 14FFFFFF MOV DWORD PTR SS:[EBP-EC],EBX
00403E8C . 899D 04FFFFFF MOV DWORD PTR SS:[EBP-FC],EBX
00403E92 . 899D F4FEFFFF MOV DWORD PTR SS:[EBP-10C],EBX
00403E98 . 8995 ECFEFFFF MOV DWORD PTR SS:[EBP-114],EDX
00403E9E . C785 E4FEFFFF>MOV DWORD PTR SS:[EBP-11C],4008
00403EA8 . FF15 7C114000 CALL DWORD PTR DS:[<&MSVBVM60.#619>] ; MSVBVM60.rtcRightCharVar
00403EAE . 8D55 C0 LEA EDX,DWORD PTR SS:[EBP-40] ; 取MD5值的最后四位
00403EB1 . 8D45 D8 LEA EAX,DWORD PTR SS:[EBP-28]
00403EB4 . 52 PUSH EDX ; 取出邮箱名计算结果
00403EB5 . 8D8D 74FFFFFF LEA ECX,DWORD PTR SS:[EBP-8C]
00403EBB . 50 PUSH EAX ; 取出机器码计算结果
00403EBC . 51 PUSH ECX
00403EBD . FF15 5C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaVarXor>] ; MSVBVM60.__vbaVarXor
00403EC3 . 8B1D 14114000 MOV EBX,DWORD PTR DS:[<&MSVBVM60.__vbaVarCat>>; MSVBVM60.__vbaVarCat
00403EC9 . 50 PUSH EAX ; 两者异或的结果
00403ECA . 8D95 14FFFFFF LEA EDX,DWORD PTR SS:[EBP-EC]
00403ED0 . 8D85 64FFFFFF LEA EAX,DWORD PTR SS:[EBP-9C]
00403ED6 . 52 PUSH EDX
00403ED7 . 50 PUSH EAX
00403ED8 . FFD3 CALL EBX ; <&MSVBVM60.__vbaVarCat>
00403EDA . 8D8D 04FFFFFF LEA ECX,DWORD PTR SS:[EBP-FC] ; 连接
00403EE0 . 50 PUSH EAX
00403EE1 . 8D95 54FFFFFF LEA EDX,DWORD PTR SS:[EBP-AC]
00403EE7 . 51 PUSH ECX
00403EE8 . 52 PUSH EDX
00403EE9 . FFD3 CALL EBX
00403EEB . 50 PUSH EAX ; 异或结果连接5位的字符串
00403EEC . 8D85 F4FEFFFF LEA EAX,DWORD PTR SS:[EBP-10C]
00403EF2 . 8D8D 44FFFFFF LEA ECX,DWORD PTR SS:[EBP-BC]
00403EF8 . 50 PUSH EAX
00403EF9 . 51 PUSH ECX
00403EFA . FFD3 CALL EBX
00403EFC . 50 PUSH EAX
00403EFD . 8D95 34FFFFFF LEA EDX,DWORD PTR SS:[EBP-CC]
00403F03 . 8D85 24FFFFFF LEA EAX,DWORD PTR SS:[EBP-DC]
00403F09 . 52 PUSH EDX
00403F0A . 50 PUSH EAX
00403F0B . FFD3 CALL EBX
00403F0D . 8BD0 MOV EDX,EAX ; 连接MD5值的最后4位
00403F0F . 8D4D 9C LEA ECX,DWORD PTR SS:[EBP-64]
00403F12 . FF15 10104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaVarMove>] ; MSVBVM60.__vbaVarMove
00403F18 . 8B1D 28104000 MOV EBX,DWORD PTR DS:[<&MSVBVM60.__vbaFreeVar>; MSVBVM60.__vbaFreeVarList
00403F1E . 8D8D 34FFFFFF LEA ECX,DWORD PTR SS:[EBP-CC]
00403F24 . 8D95 44FFFFFF LEA EDX,DWORD PTR SS:[EBP-BC]
00403F2A . 51 PUSH ECX
00403F2B . 8D85 54FFFFFF LEA EAX,DWORD PTR SS:[EBP-AC]
00403F31 . 52 PUSH EDX
00403F32 . 8D8D 64FFFFFF LEA ECX,DWORD PTR SS:[EBP-9C]
00403F38 . 50 PUSH EAX
00403F39 . 51 PUSH ECX
00403F3A . 6A 04 PUSH 4
00403F3C . FFD3 CALL EBX ; <&MSVBVM60.__vbaFreeVarList>
00403F3E . 8B17 MOV EDX,DWORD PTR DS:[EDI]
00403F40 . 83C4 14 ADD ESP,14
00403F43 . 57 PUSH EDI
00403F44 . FF92 04030000 CALL DWORD PTR DS:[EDX+304]
00403F4A . 50 PUSH EAX
00403F4B . 8D45 88 LEA EAX,DWORD PTR SS:[EBP-78]
00403F4E . 50 PUSH EAX
00403F4F . FF15 7C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaObjSet>] ; MSVBVM60.__vbaObjSet
00403F55 . 8BF8 MOV EDI,EAX
00403F57 . 8D55 98 LEA EDX,DWORD PTR SS:[EBP-68]
00403F5A . 52 PUSH EDX
00403F5B . 57 PUSH EDI
00403F5C . 8B0F MOV ECX,DWORD PTR DS:[EDI]
00403F5E . FF91 A0000000 CALL DWORD PTR DS:[ECX+A0]
00403F64 . 3BC6 CMP EAX,ESI
00403F66 . DBE2 FCLEX
00403F68 . 7D 12 JGE SHORT crackeme.00403F7C
00403F6A . 68 A0000000 PUSH 0A0
00403F6F . 68 B8294000 PUSH crackeme.004029B8
00403F74 . 57 PUSH EDI
00403F75 . 50 PUSH EAX
00403F76 . FF15 4C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaHresultChe>; MSVBVM60.__vbaHresultCheckObj
00403F7C > 8B45 98 MOV EAX,DWORD PTR SS:[EBP-68] ; 取出假注册码
00403F7F . 8D4D 9C LEA ECX,DWORD PTR SS:[EBP-64]
00403F82 . 8985 7CFFFFFF MOV DWORD PTR SS:[EBP-84],EAX
00403F88 . 8D85 74FFFFFF LEA EAX,DWORD PTR SS:[EBP-8C]
00403F8E . 50 PUSH EAX ; 假注册码
00403F8F . 51 PUSH ECX ; 真注册码
00403F90 . 8975 98 MOV DWORD PTR SS:[EBP-68],ESI
00403F93 . C785 74FFFFFF>MOV DWORD PTR SS:[EBP-8C],8008
00403F9D . FF15 C8104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaVarTstEq>] ; MSVBVM60.__vbaVarTstEq
00403FA3 . 8D4D 88 LEA ECX,DWORD PTR SS:[EBP-78] ; 对比
00403FA6 . 8BF8 MOV EDI,EAX
00403FA8 . FF15 9C114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeObj>] ; MSVBVM60.__vbaFreeObj
00403FAE . 8D8D 74FFFFFF LEA ECX,DWORD PTR SS:[EBP-8C]
00403FB4 . FF15 18104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaFreeVar>] ; MSVBVM60.__vbaFreeVar
00403FBA . 66:3BFE CMP DI,SI
00403FBD . C785 7CFFFFFF>MOV DWORD PTR SS:[EBP-84],4B
00403FC7 . C785 74FFFFFF>MOV DWORD PTR SS:[EBP-8C],2
00403FD1 . BA E4294000 MOV EDX,crackeme.004029E4
00403FD6 . 8D4D 98 LEA ECX,DWORD PTR SS:[EBP-68]
00403FD9 . 0F84 C1000000 JE crackeme.004040A0 ; 爆破点
00403FDF . FF15 34114000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaStrCopy>] ; MSVBVM60.__vbaStrCopy
00403FE5 . 8D95 74FFFFFF LEA EDX,DWORD PTR SS:[EBP-8C]
00403FEB . 8D45 98 LEA EAX,DWORD PTR SS:[EBP-68]
00403FEE . 52 PUSH EDX
00403FEF . 50 PUSH EAX
算法总结：
字符串1为"1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ"
字符串2为"crackme6-lxbylangxangpostinbbs.pediy.com"
1、取用户名的16位MD5值（即32位MD5值的第8-24位）转化为大写，在结果中从第5位开始取5位记为A，并在字符串1中找出A各个字符的位置，然后在字符串2中找出相应的位置组成新的字符串B。
2、将邮箱名每个字符的ASCII码逻辑右移2位后累加计为SUM。
3、将机器码每个字符的ASCII码异或SUM后再累加计为JQM。
4、判断JQM为奇数还是偶数，如果是奇数，注册码为SUM和JQM的异或值“-”号连接B“-”号连接用户名的16位MD5值的后4位，如果是偶数，注册码为SUM和JQM的异或值“-”号连接A“-”号连接用户名的16位MD5值的后4位。
现在我们来根据算法写出注册机（源码见附件），注释我就不写了（为了让你们自己去查）。
一、VB，四个文本框加按钮：
Public Function SHR(iShr As Long, n As Integer) As Long 'SHR逻辑移位函数
Dim i As Integer
For i = 1 To n - 1
iShr = iShr \ 2
Next i
CF = iShr And 1
SHR = iShr \ 2
End Function
Private Sub Command1_Click()
Dim str1 As String, str2 As String
Dim a As String, temp As String
Dim i As Integer
Dim c, sum, middle
str1 = "1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ"
str2 = "crackme6-lxbylangxangpostinbbs.pediy.com"
If IsNumeric(Text1.Text) = False Then
MsgBox "机器码为数字组成！", 48, "提示"
Else
If Len(Text2.Text) = 0 Or Len(Text2.Text) > 16 Then
MsgBox "用户名不能为空,长度小于16位！", 48, "提示"
Else
If Text3.Text = "" Then
MsgBox "请输入邮箱名！", 48, "提示"
Else
For i = 1 To Len(Text3.Text)
sum = sum + SHR(Asc(Mid(Text3.Text, i, 1)), 2)
Next
For i = 1 To Len(Text1.Text)
jqm = jqm + (Asc(Mid(Text1.Text, i, 1)) Xor sum)
Next
a = UCase(MD5(Text2.Text, 16))
temp = Mid(a, 5, 5)
If jqm Mod 2 = 0 Then
Text4.Text = (sum Xor jqm) & "-" & temp & "-" & Right(a, 4)
Else
For i = 1 To Len(temp)
middle = middle & Mid(str2, InStr(1, str1, Mid(temp, i, 1)), 1)
Next i
Text4.Text = (sum Xor jqm) & "-" & middle & "-" & Right(a, 4)
End If
End If
End If
End If
二、DELPHI
procedure TForm1.Button1Click(Sender: TObject);
VAR
str1,str2:string;
i,sum,jqm:integer;
a,b,c:string;
begin
str1 := '1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ';
str2 := 'crackme6-lxbylangxangpostinbbs.pediy.com' ;
If Length(edit2.text) = 0 Then MessageBox(0, '用户名不能为空！', '提示', MB_OK + MB_ICONWARNING)
else
If Length(edit3.text) = 0 Then MessageBox(0, '邮箱名不能为空！', '提示', MB_OK + MB_ICONWARNING)
else
begin
sum:=0;
for i:=0 to length(edit3.text)-1 do
begin
sum:=sum+(ord(edit3.text[i])shr 2);
end;
jqm:=0;
for i:=0 to length(edit1.text)-1 do
begin
jqm:=jqm+(ord(edit1.text[i])xor sum);
end;
a :=UpperCase(md5print(md5string(edit2.text)));
b :=copy(a,13,5);
For i := 0 to Length(b)-1 do
begin
c := c + Str2[Pos(b[i],Str1)];
end;
if jqm mod 2 =0 then edit4.text:=inttostr(sum xor jqm) + '-' + b + '-' + copy(a,21,4)
else
edit4.text:=inttostr(sum xor jqm) + '-' + c + '-' + copy(a,21,4);
end;
end;
三、MFC
void CMDDlg::OnButtonResult()
{
// TODO: Add your control notification handler code here
int i,sum=0,jqm=0,pos[20];
CString str,str0,last,a,b;
CString str1 = "1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ";
CString str2 = "crackme6-lxbylangxangpostinbbs.pediy.com";
char cName[255],cEmail[255],cMachine[255],first[255];
const char* temp;
UpdateData(TRUE);
if(m_Edit1.GetLength()==0 )MessageBox("机器码不能为空！", "error", MB_OK);
else
if(m_Edit2.GetLength()==0 )MessageBox("用户名不能为空！", "error", MB_OK);
else
if(m_Edit3.GetLength()==0 )MessageBox("邮箱名不能为空！", "error", MB_OK);
else{
strcpy(cMachine,m_Edit1);
strcpy(cName,m_Edit2);
strcpy(cEmail,m_Edit3);
for (i=0;i<m_Edit3.GetLength ();i++) {
cEmail[i]=cEmail[i]>> 2 ;
sum+= cEmail[i];
}
for (i=0;i<m_Edit1.GetLength ();i++) {
cMachine[i] ^=sum;
jqm+=cMachine[i];
}
jqm^=sum;
_itoa(jqm,first,10);
a=first;
CMD5 md5;
md5.setPlainText(m_Edit2);
temp = md5.getMD5Digest();
str=temp;
str.MakeUpper();
str0 = str.Mid(12,5);
last=str.Mid(20,4);
for (i=0;i<str0.GetLength ();i++){
pos[i]=str1.Find(str0[i]);
b+=str2.Mid(pos[i],1);
}
if(jqm%2==0) m_Edit4=a+'-'+str0+'-'+last;
else {
m_Edit4=a+'-'+b+'-'+last;
}
}
UpdateData(FALSE);
}
最好自己尝试写一下，这样也好消化。
附件下载:keygen4.rar
【版权声明】: 本文由langxang原创于看雪论坛，转载请注明作者并保持文章的完整, 谢谢!