Function at 0x408040
Capabilities:
Encode data using xor

Disassembly:
mov dword [esp + 0x14], edi
xor eax, dword [edi]
xor ebx, dword [edi + 4]
xor ecx, dword [edi + 8]
xor edx, dword [edi + 0xc]
mov esi, dword [edi + 0xf0]
lea esi, [esi + esi - 2]
lea esi, [edi + esi*8]
mov dword [esp + 0x18], esi
mov esi, eax
and esi, 0xff
mov esi, dword [ebp + esi*8]
movzx edi, dh
xor esi, dword [ebp + edi*8 + 3]
mov edi, ecx
shr edi, 0x10
and edi, 0xff
xor esi, dword [ebp + edi*8 + 2]
mov edi, ebx
shr edi, 0x18
xor esi, dword [ebp + edi*8 + 1]
mov dword [esp + 4], esi
mov esi, ebx
and esi, 0xff
mov esi, dword [ebp + esi*8]
movzx edi, ah
xor esi, dword [ebp + edi*8 + 3]
mov edi, edx
shr edi, 0x10
and edi, 0xff
xor esi, dword [ebp + edi*8 + 2]
mov edi, ecx
shr edi, 0x18
xor esi, dword [ebp + edi*8 + 1]
mov dword [esp + 8], esi
mov esi, ecx
and esi, 0xff
mov esi, dword [ebp + esi*8]
movzx edi, bh
xor esi, dword [ebp + edi*8 + 3]
mov edi, eax
shr edi, 0x10
and edi, 0xff
xor esi, dword [ebp + edi*8 + 2]
mov edi, edx
shr edi, 0x18
xor esi, dword [ebp + edi*8 + 1]
mov edi, dword [esp + 0x14]
and edx, 0xff
mov edx, dword [ebp + edx*8]
movzx ecx, ch
xor edx, dword [ebp + ecx*8 + 3]
mov ecx, esi
shr ebx, 0x10
and ebx, 0xff
xor edx, dword [ebp + ebx*8 + 2]
mov ebx, dword [esp + 8]
shr eax, 0x18
xor edx, dword [ebp + eax*8 + 1]
mov eax, dword [esp + 4]
add edi, 0x10
xor eax, dword [edi]
xor ebx, dword [edi + 4]
xor ecx, dword [edi + 8]
xor edx, dword [edi + 0xc]
cmp edi, dword [esp + 0x18]
mov dword [esp + 0x14], edi
jb 0x408060
lea ebp, [ebp + 0x880]
mov edi, dword [ebp - 0x80]
mov esi, dword [ebp - 0x60]
mov edi, dword [ebp - 0x40]
mov esi, dword [ebp - 0x20]
mov edi, dword [ebp]
mov esi, dword [ebp + 0x20]
mov edi, dword [ebp + 0x40]
mov esi, dword [ebp + 0x60]
lea ebp, [ebp - 0x80]
mov esi, eax
and esi, 0xff
movzx esi, byte [ebp + esi]
movzx edi, dh
movzx edi, byte [ebp + edi]
shl edi, 8
xor esi, edi
mov edi, ecx
shr edi, 0x10
and edi, 0xff
movzx edi, byte [ebp + edi]
shl edi, 0x10
xor esi, edi
mov edi, ebx
shr edi, 0x18
movzx edi, byte [ebp + edi]
shl edi, 0x18
xor esi, edi
mov dword [esp + 4], esi
mov esi, ebx
and esi, 0xff
movzx esi, byte [ebp + esi]
movzx edi, ah
movzx edi, byte [ebp + edi]
shl edi, 8
xor esi, edi
mov edi, edx
shr edi, 0x10
and edi, 0xff
movzx edi, byte [ebp + edi]
shl edi, 0x10
xor esi, edi
mov edi, ecx
shr edi, 0x18
movzx edi, byte [ebp + edi]
shl edi, 0x18
xor esi, edi
mov dword [esp + 8], esi
mov esi, ecx
and esi, 0xff
movzx esi, byte [ebp + esi]
movzx edi, bh
movzx edi, byte [ebp + edi]
shl edi, 8
xor esi, edi
mov edi, eax
shr edi, 0x10
and edi, 0xff
movzx edi, byte [ebp + edi]
shl edi, 0x10
xor esi, edi
mov edi, edx
shr edi, 0x18
movzx edi, byte [ebp + edi]
shl edi, 0x18
xor esi, edi
mov edi, dword [esp + 0x14]
and edx, 0xff
movzx edx, byte [ebp + edx]
movzx ecx, ch
movzx ecx, byte [ebp + ecx]
shl ecx, 8
xor edx, ecx
mov ecx, esi
shr ebx, 0x10
and ebx, 0xff
movzx ebx, byte [ebp + ebx]
shl ebx, 0x10
xor edx, ebx
mov ebx, dword [esp + 8]
shr eax, 0x18
movzx eax, byte [ebp + eax]
shl eax, 0x18
xor edx, eax
mov eax, dword [esp + 4]
lea ebp, [ebp - 0x800]
add edi, 0x10
xor eax, dword [edi]
xor ebx, dword [edi + 4]
xor ecx, dword [edi + 8]
xor edx, dword [edi + 0xc]
ret