Reverse/Cerberus/source/sp_keygen/Program.cs

104 lines
2.9 KiB
C#
Raw Normal View History

2024-11-08 14:36:15 +08:00
namespace sp_keygen
{
internal class Program
{
static void Main()
{
Console.Write("Name: ");
string? name = Console.ReadLine();
if (string.IsNullOrEmpty(name))
{
Console.WriteLine("Please input name.");
return;
}
else if (name.Length <= 4)
{
Console.WriteLine("Name must be longer than 4 characters.");
return;
}
Console.WriteLine($"Serial: {CalcSerial(name)}");
Console.ReadKey();
}
public static string CalcSerial(string name)
{
int name_length = name.Length;
int esi = 0x18;
int ebx = 0x400;
int ebp = 0x32;
int ecx = name_length;
int eax, edx, edi, v10 = 0;
foreach (char c in name)
{
eax = c;
eax += 0x56B;
edx = eax;
edx ^= 0x890428;
esi += edx;
edx = name[3];
if (ecx <= 9)
{
edx += ecx;
edx ^= 0x209;
edx *= esi;
ebx += edx;
}
else
{
edx += ecx;
edx ^= 0x209;
edx *= ebx;
esi += edx;
}
edx = eax;
edx <<= 7;
edx += eax;
eax += edx * 8;
v10 = ebx + eax * 4;
ebx = v10; //first loop not run
}
string temp = name;
for (edi = 5; edi > 0; edi--)
{
eax = temp[edi];
ebp = eax + ebp + 0x134A;
temp = Fun_403c80(temp);
}
string temp2 = temp; //edx
edi = 1;
for (ebx = 5; ebx > 0; ebx--)
{
ecx = temp2[0];
eax = temp2[edi];
eax += 0x23;
ebp += ecx + 0x134A;
ecx = eax * 3;
ecx *= 5;
edx = ecx * 5;
eax += edx * 4;
esi += eax * 2;
temp2 = Fun_403c80(temp2);
edi++;
}
edx = temp2[5];
eax = 0x18;
ecx = v10;
eax -= edx;
ebp += ecx;
edx = temp2[2];
eax ^= ebp;
esi += 0x3c;
int eax2 = 0x1337;
eax2 -= edx;
eax2 ^= esi;
return $"LNT-{eax2}-{eax}"; //user32._wsprintfA(edx,"%s-%d-%d","LNT",eax2,eax); //esi
}
//反转字符串
public static string Fun_403c80(string name)
{
return new string(name.Reverse().ToArray());
}
}
}