0045D3B0 /$ 8B4424 08 MOV EAX,DWORD PTR SS:[ESP+8] ; Eax has the length
0045D3B4 |. 56 PUSH ESI ; Push down the start of the packet
0045D3B5 |. 33F6 XOR ESI,ESI
0045D3B7 |. 85C0 TEST EAX,EAX
0045D3B9 |. 7E 52 JLE SHORT MatchSer.0045D40D
0045D3BB |. 53 PUSH EBX ; pushing down the packet length, prolly to preserve
0045D3BC |. 55 PUSH EBP ; who the fuck knows
0045D3BD |. 8B6C24 18 MOV EBP,DWORD PTR SS:[ESP+18] ; Load ebp with something
0045D3C1 |. 57 PUSH EDI
0045D3C2 |. 8B7C24 14 MOV EDI,DWORD PTR SS:[ESP+14] ; load edi start of packet
0045D3C6 |. 894424 18 MOV DWORD PTR SS:[ESP+18],EAX ; move to the stack the packet size
0045D3CA |. 8D9B 00000000 LEA EBX,DWORD PTR DS:[EBX] ; pop into ebx the packet size
0045D3D0 |> 8A07 /MOV AL,BYTE PTR DS:[EDI] ; get a byte from the packet ( starts after 6 byte header )
0045D3D2 |. 8B1D D0845200 |MOV EBX,DWORD PTR DS:[5284D0] ; Whats stored here? Currently 3
0045D3D8 |. 8A15 48856700 |MOV DL,BYTE PTR DS:[678548] ; Whats stored here, currently 7
0045D3DE |. 34 F0 |XOR AL,0F0 ; xor the byte from packet with 0f0
0045D3E0 |. 22D0 |AND DL,AL ; and DL with what we got from 678548 ( was 7 ) with the xor of the firste byte of the packet
0045D3E2 |. B9 08000000 |MOV ECX,8 ; move 8 into ecx
0045D3E7 |. 2BCB |SUB ECX,EBX ; subtract ebx ( we read three ), from 8
0045D3E9 |. D2E2 |SHL DL,CL ; shift dl by the subtraction
0045D3EB |. 8ACB |MOV CL,BL ; move that result into cl
0045D3ED |. D2E8 |SHR AL,CL ; shift al (first byte xored with 0f0) by the sub ecx, ebx line
0045D3EF |. 0AD0 |OR DL,AL ; or the subtraction line with the result of the above shift
0045D3F1 |. 32142E |XOR DL,BYTE PTR DS:[ESI+EBP] ; I have no idea what the fuck this is, but its coring dl with it
0045D3F4 |. 46 |INC ESI ; increment the storage pointer
0045D3F5 |. 83FE 20 |CMP ESI,20 ; check if we have done thise more thenb 0x20 times
0045D3F8 |. 8817 |MOV BYTE PTR DS:[EDI],DL ; store the result in the packet buffer
0045D3FA |. 7C 02 |JL SHORT MatchSer.0045D3FE
0045D3FC |. 33F6 |XOR ESI,ESI
0045D3FE |> 8B4424 18 |MOV EAX,DWORD PTR SS:[ESP+18] ; load it up with the length again
0045D402 |. 47 |INC EDI ; next char to decrypt
0045D403 |. 48 |DEC EAX ; subtract one from length
0045D404 |. 894424 18 |MOV DWORD PTR SS:[ESP+18],EAX ; store the length for reuse
0045D408 |.^ 75 C6 \JNZ SHORT MatchSer.0045D3D0 ; do it all again
0045D40A |. 5F POP EDI
0045D40B |. 5D POP EBP
0045D40C |. 5B POP EBX
0045D40D |> B0 01 MOV AL,1
0045D40F |. 5E POP ESI
0045D410 \. C3 RETN