004C7201 8B45D4 mov eax, [ebp-$2C]
* Reference to: sysutils.StrToInt64(System.AnsiString):System.Int64;
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004C7204 E86B1BF4FF call 00408D74 ；输入的注册码变成数值
004C7209 8945F0 mov [ebp-$10], eax
004C720C 8955F4 mov [ebp-$0C], edx ；保存在edx,eax中
004C720F 6A00 push $00
004C7211 6A18 push $18
004C7213 8B45F0 mov eax, [ebp-$10]
004C7216 8B55F4 mov edx, [ebp-$0C]
* Reference to: system.@_lldiv;
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004C7219 E8A4F5F3FF call 004067C2 ；除以$18
004C721E 8945F0 mov [ebp-$10], eax
004C7221 8955F4 mov [ebp-$0C], edx
004C7224 8B45F0 mov eax, [ebp-$10]
004C7227 8B55F4 mov edx, [ebp-$0C]
004C722A 2D84410100 sub eax, $00014184
004C722F 83DA00 sbb edx, +$00 ；减去$00014184
004C7232 8945F0 mov [ebp-$10], eax
004C7235 8955F4 mov [ebp-$0C], edx
004C7238 8D45D8 lea eax, [ebp-$28]
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004C723B E81840FFFF call 004BB258
004C7240 8B45D8 mov eax, [ebp-$28] ；eax保存着CPUID
004C7243 99 cdq
004C7244 8945E8 mov [ebp-$18], eax
004C7247 8955EC mov [ebp-$14], edx
004C724A 8B45F0 mov eax, [ebp-$10]
004C724D 8B55F4 mov edx, [ebp-$0C]
004C7250 3B55EC cmp edx, [ebp-$14]
004C7253 754B jnz 004C72A0
004C7255 3B45E8 cmp eax, [ebp-$18]
004C7258 7546 jnz 004C72A0
004C725A 6A00 push $00
004C725C 668B0D28734C00 mov cx, word ptr [$4C7328]
004C7263 B202 mov dl, $02
* Possible String Reference to: '软件登记注册成功!'
|
004C7265 B834734C00 mov eax, $004C7334
然后看看和机器码怎么挂钩：
004AC730 E87FFFFFFF call 004AC6B4
004AC735 8B45E8 mov eax, [ebp-$18] ；CPUID
004AC738 99 cdq
004AC739 8945F8 mov [ebp-$08], eax
004AC73C 8955FC mov [ebp-$04], edx
004AC73F 8B45F8 mov eax, [ebp-$08]
004AC742 8B55FC mov edx, [ebp-$04]
004AC745 0584410100 add eax, +$00014184 ；加上$00014184
004AC74A 83D200 adc edx, +$00
004AC74D 8945F8 mov [ebp-$08], eax
004AC750 8955FC mov [ebp-$04], edx
004AC753 6A00 push $00
004AC755 6A18 push $18
004AC757 8B45F8 mov eax, [ebp-$08]
004AC75A 8B55FC mov edx, [ebp-$04]
|
004AC75D E81AA0F5FF call 0040677C ；乘以$18
004AC762 8945F8 mov [ebp-$08], eax
004AC765 8955FC mov [ebp-$04], edx
004AC768 8B45F8 mov eax, [ebp-$08]
004AC76B 8B55FC mov edx, [ebp-$04]
004AC76E 2DCDB40000 sub eax, $0000B4CD ；减去$0000B4CD
004AC773 83DA00 sbb edx, +$00
004AC776 8945F8 mov [ebp-$08], eax
004AC779 8955FC mov [ebp-$04], edx
004AC77C 6A00 push $00
004AC77E 6A4B push $4B
004AC780 8B45F8 mov eax, [ebp-$08]
004AC783 8B55FC mov edx, [ebp-$04]
|
004AC786 E8F19FF5FF call 0040677C ；乘以$4B
004AC78B 8945F8 mov [ebp-$08], eax
004AC78E 8955FC mov [ebp-$04], edx
004AC791 FF75FC push dword ptr [ebp-$04]
004AC794 FF75F8 push dword ptr [ebp-$08]
004AC797 8D45E4 lea eax, [ebp-$1C]
* Reference to: sysutils.IntToStr(System.Int64):System.AnsiString;overload;
|
004AC79A E865C5F5FF call 00408D04
004AC79F 8B55E4 mov edx, [ebp-$1C]
总结：
机器码 = ((CPUID + $14184) * $18 - $B4CD) * $4B
注册码 = (CPUID + $14184) * $18
所以：
注册码 = 机器码 div $4B + $B4CD
附录：
搜易的邮件地址搜索专家
form1.N13Click
机器码 = ((CPUID + $1452D) * $3BA - $106DB) * $243
注册码 = (CPUID + $1452D) * $3BA
所以：
注册码 = 机器码 div $243 + $106DB