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Speaking Clock Deluxe V3.05 算法分析
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日期:2008年10月28日 作者: 查看:[大字体
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:004E77CE 8B55F4 mov edx, dword ptr [ebp-0C] <<--edx=="45454545" :004E77D1 58 pop eax <<--eax=="/ICC16746" :004E77D2 E85DD5F1FF call 00404D34 <<--注册码比较 :004E77D7 754F jne 004E7828 <<--不等则注册失败 :004E77D9 8D55F0 lea edx, dword ptr [ebp-10] :004E77DC 8B83F0020000 mov eax, dword ptr [ebx+000002F0] :004E77E2 E8A113F6FF call 00448B88 :004E77E7 8B55F0 mov edx, dword ptr [ebp-10] :004E77EA 8D8638270000 lea eax, dword ptr [esi+00002738]
既然是算法分析,那就要进call 004E4074看看注册码是如何计算的:
======================call 004E4074==================== :004E4074 55 push ebp :004E4075 8BEC mov ebp, esp :004E4077 51 push ecx :004E4078 B904000000 mov ecx, 00000004
* Referenced by a (U)nconditional or (C)onditional Jump at Address: :004E4082(C)
:004E407D 6A00 push 00000000 :004E407F 6A00 push 00000000 :004E4081 49 dec ecx
* Referenced by a (U)nconditional or (C)onditional Jump at Address: :004E400B(C)
:004E4082 75F9 jne 004E407D :004E4084 51 push ecx :004E4085 874DFC xchg dword ptr [ebp-04], ecx :004E4088 53 push ebx
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