Function at 0x40ec50
Capabilities:
Encode data using xor
Encrypt data using aes
Reference aes constants

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x14
push edi
mov edi, ecx
mov dword [ebp - 0x10], edi
cmp byte [edi + 4], 0
je 0x40efd0
push ebx
push esi
mov esi, dword [ebp + 8]
movzx ebx, byte [esi]
movzx eax, byte [esi + 1]
movzx ecx, byte [esi + 4]
shl eax, 0x10
shl ebx, 0x18
or ebx, eax
shl ecx, 0x18
movzx eax, byte [esi + 2]
shl eax, 8
or ebx, eax
movzx edx, byte [esi + 0xc]
movzx eax, byte [esi + 3]
or ebx, eax
shl edx, 0x18
movzx eax, byte [esi + 5]
shl eax, 0x10
or ecx, eax
xor ebx, dword [edi + 0x1e8]
movzx eax, byte [esi + 6]
shl eax, 8
or ecx, eax
mov dword [ebp - 8], ebx
movzx eax, byte [esi + 7]
or ecx, eax
movzx eax, byte [esi + 8]
xor ecx, dword [edi + 0x1ec]
mov dword [ebp - 4], ecx
movzx ecx, byte [esi + 9]
shl ecx, 0x10
shl eax, 0x18
or eax, ecx
movzx ecx, byte [esi + 0xa]
shl ecx, 8
or eax, ecx
movzx ecx, byte [esi + 0xb]
or eax, ecx
movzx ecx, byte [esi + 0xd]
xor eax, dword [edi + 0x1f0]
shl ecx, 0x10
or edx, ecx
movzx ecx, byte [esi + 0xe]
shl ecx, 8
mov dword [ebp + 8], ecx
movzx ecx, byte [esi + 0xf]
or dword [ebp + 8], ecx
mov ecx, dword [ebp + 8]
mov esi, dword [edi + 0x3d0]
or ecx, edx
xor ecx, dword [edi + 0x1f4]
mov dword [ebp + 8], ecx
mov dword [ebp - 0xc], esi
cmp esi, 1
jle 0x40ee4a
lea edx, [edi + 0x210]
mov dword [ebp - 8], edx
lea edx, [esi - 1]
mov dword [ebp - 0x14], edx
nop
sar ecx, 8
movzx edx, cl
mov ecx, dword [ebp - 4]
sar ecx, 0x18
movzx ecx, cl
mov edi, dword [edx*4 + 0x448148]
xor edi, dword [ecx*4 + 0x448948]
mov ecx, ebx
sar ecx, 0x10
movzx ecx, cl
xor edi, dword [ecx*4 + 0x448548]
movzx ecx, al
xor edi, dword [ecx*4 + 0x447d48]
mov ecx, dword [ebp - 8]
xor edi, dword [ecx - 4]
mov ecx, eax
sar ecx, 0x18
movzx edx, cl
mov ecx, dword [ebp - 4]
sar ecx, 0x10
movzx ecx, cl
mov esi, dword [edx*4 + 0x448948]
mov edx, dword [ebp + 8]
xor esi, dword [ecx*4 + 0x448548]
mov ecx, ebx
sar ecx, 8
movzx ecx, cl
xor esi, dword [ecx*4 + 0x448148]
movzx ecx, dl
xor esi, dword [ecx*4 + 0x447d48]
mov ecx, dword [ebp - 8]
xor esi, dword [ecx]
mov ecx, edx
sar ecx, 0x18
movzx edx, cl
mov ecx, eax
sar ecx, 0x10
movzx ecx, cl
sar eax, 8
mov edx, dword [edx*4 + 0x448948]
movzx eax, al
xor edx, dword [ecx*4 + 0x448548]
mov ecx, dword [ebp - 4]
sar ecx, 8
movzx ecx, cl
xor edx, dword [ecx*4 + 0x448148]
movzx ecx, bl
sar ebx, 0x18
xor edx, dword [ecx*4 + 0x447d48]
mov ecx, dword [ebp - 8]
xor edx, dword [ecx + 4]
mov ecx, dword [ebp + 8]
sar ecx, 0x10
movzx ecx, cl
mov ecx, dword [ecx*4 + 0x448548]
xor ecx, dword [eax*4 + 0x448148]
movzx eax, bl
xor ecx, dword [eax*4 + 0x448948]
mov eax, dword [ebp - 4]
movzx eax, al
mov dword [ebp - 4], edi
xor ecx, dword [eax*4 + 0x447d48]
mov eax, dword [ebp - 8]
add dword [ebp - 8], 0x20
xor ecx, dword [eax - 8]
mov eax, esi
sub dword [ebp - 0x14], 1
mov ebx, ecx
mov ecx, edx
mov dword [ebp + 8], ecx
jne 0x40ed30
mov edi, dword [ebp - 0x10]
mov esi, dword [ebp - 0xc]
mov dword [ebp - 8], ebx
shl esi, 5
mov dword [ebp - 0xc], esi
mov ebx, dword [esi + edi + 0x1e8]
mov edx, ebx
mov edi, dword [ebp - 8]
mov ecx, edi
mov esi, dword [ebp + 0xc]
sar ecx, 0x18
movzx ecx, cl
sar edx, 0x18
xor dl, byte [ecx + 0x449d48]
mov ecx, dword [ebp + 8]
sar ecx, 0x10
movzx ecx, cl
mov byte [esi], dl
mov edx, ebx
sar edx, 0x10
xor dl, byte [ecx + 0x449d48]
mov ecx, eax
sar ecx, 8
movzx ecx, cl
mov byte [esi + 1], dl
mov edx, ebx
sar edx, 8
xor dl, byte [ecx + 0x449d48]
mov byte [esi + 2], dl
mov edx, dword [ebp - 4]
movzx ecx, dl
movzx ecx, byte [ecx + 0x449d48]
xor cl, bl
mov ebx, dword [ebp - 0x10]
mov byte [esi + 3], cl
mov ecx, dword [ebp - 0xc]
mov ebx, dword [ecx + ebx + 0x1ec]
mov ecx, edx
sar ecx, 0x18
mov edx, ebx
movzx ecx, cl
sar edx, 0x18
xor dl, byte [ecx + 0x449d48]
mov ecx, edi
sar ecx, 0x10
movzx ecx, cl
mov byte [esi + 4], dl
mov edx, ebx
sar edx, 0x10
xor dl, byte [ecx + 0x449d48]
mov ecx, dword [ebp + 8]
sar ecx, 8
movzx ecx, cl
mov byte [esi + 5], dl
mov edx, ebx
sar edx, 8
xor dl, byte [ecx + 0x449d48]
mov byte [esi + 6], dl
mov edx, dword [ebp - 0xc]
movzx ecx, al
movzx ecx, byte [ecx + 0x449d48]
xor cl, bl
mov byte [esi + 7], cl
mov ecx, dword [ebp - 0x10]
mov ebx, dword [edx + ecx + 0x1f0]
mov ecx, eax
sar ecx, 0x18
mov edx, ebx
movzx ecx, cl
sar edx, 0x18
xor dl, byte [ecx + 0x449d48]
mov ecx, dword [ebp - 4]
sar ecx, 0x10
mov byte [esi + 8], dl
mov edx, ebx
movzx ecx, cl
sar edx, 0x10
xor dl, byte [ecx + 0x449d48]
mov ecx, edi
mov byte [esi + 9], dl
mov edx, ebx
sar ecx, 8
movzx ecx, cl
sar edx, 8
xor dl, byte [ecx + 0x449d48]
mov byte [esi + 0xa], dl
mov edx, dword [ebp + 8]
movzx ecx, dl
sar edx, 0x18
sar eax, 0x10
movzx eax, al
movzx ecx, byte [ecx + 0x449d48]
xor cl, bl
mov ebx, dword [ebp - 0xc]
mov byte [esi + 0xb], cl
mov ecx, dword [ebp - 0x10]
mov ebx, dword [ebx + ecx + 0x1f4]
movzx ecx, dl
mov edx, ebx
sar edx, 0x18
xor dl, byte [ecx + 0x449d48]
mov ecx, ebx
sar ecx, 0x10
xor cl, byte [eax + 0x449d48]
mov eax, dword [ebp - 4]
sar eax, 8
movzx eax, al
mov byte [esi + 0xd], cl
mov ecx, ebx
sar ecx, 8
mov byte [esi + 0xc], dl
xor cl, byte [eax + 0x449d48]
mov eax, edi
movzx eax, al
mov byte [esi + 0xe], cl
mov al, byte [eax + 0x449d48]
xor al, bl
mov byte [esi + 0xf], al
pop esi
pop ebx
pop edi
mov esp, ebp
pop ebp
ret 8