Function at 0x4d91c0
Capabilities:
Encode data using xor
Encrypt data using aes
Reference aes constants

Disassembly:
sub esp, 0x30
push ebp
mov ebp, ecx
cmp byte [ebp + 4], 0
je 0x4d9483
mov eax, dword [ebp + 0x3cc]
cmp eax, 0x10
jne 0x4d91ef
push dword [esp + 0x3c]
push dword [esp + 0x3c]
call fcn.00484dd0
pop ebp
add esp, 0x30
ret 8
cdq
and edx, 3
push edi
lea edi, [edx + eax]
xor eax, eax
sar edi, 2
mov dword [esp + 0x24], edi
cmp edi, 4
je 0x4d920c
cmp edi, 6
setne al
inc eax
shl eax, 5
push ebx
push esi
mov ecx, dword [eax + 0x4e15b8]
mov edx, dword [eax + 0x4e15c0]
mov eax, dword [eax + 0x4e15c8]
mov dword [esp + 0x18], eax
lea eax, [ebp + 0x454]
mov dword [esp + 0x14], ecx
mov ebx, eax
mov dword [esp + 0x10], edx
mov dword [esp + 0x1c], eax
test edi, edi
jle 0x4d9297
mov eax, dword [esp + 0x44]
mov dword [esp + 0x20], edi
lea edi, [ebp + 8]
nop word [eax + eax]
movzx ecx, byte [eax]
lea eax, [eax + 4]
shl ecx, 0x18
lea edi, [edi + 4]
mov dword [ebx], ecx
mov esi, ebx
movzx edx, byte [eax - 3]
shl edx, 0x10
or edx, ecx
mov dword [ebx], edx
movzx ecx, byte [eax - 2]
shl ecx, 8
or ecx, edx
mov dword [ebx], ecx
movzx edx, byte [eax - 1]
or edx, ecx
mov dword [ebx], edx
add ebx, 4
mov ecx, dword [edi - 4]
xor ecx, edx
sub dword [esp + 0x20], 1
mov dword [esi], ecx
jne 0x4d9250
mov edi, dword [esp + 0x2c]
mov ecx, dword [esp + 0x14]
cmp dword [ebp + 0x3d0], 1
mov dword [esp + 0x28], 1
jle 0x4d93a4
lea edx, [ebp + 0x28]
lea eax, [ebp + 0x434]
mov dword [esp + 0x2c], edx
nop dword [eax]
test edi, edi
jle 0x4d9362
mov ebx, dword [esp + 0x10]
mov esi, ecx
mov dword [esp + 0x20], eax
sub ebx, ecx
mov eax, dword [esp + 0x18]
sub eax, ecx
mov dword [esp + 0x44], edx
mov dword [esp + 0x30], eax
mov dword [esp + 0x24], edi
lea eax, [ebx + esi]
cdq
idiv edi
mov eax, dword [ebp + edx*4 + 0x454]
sar eax, 8
movzx ecx, al
mov eax, dword [esp + 0x30]
add eax, esi
cdq
idiv edi
mov ecx, dword [ecx*4 + 0x4ded90]
movzx eax, byte [ebp + edx*4 + 0x454]
xor ecx, dword [eax*4 + 0x4df190]
mov eax, esi
cdq
inc esi
idiv edi
movsx eax, word [ebp + edx*4 + 0x456]
mov edx, dword [esp + 0x20]
movzx eax, al
xor ecx, dword [eax*4 + 0x4de990]
movzx eax, byte [edx + 0x23]
xor ecx, dword [eax*4 + 0x4de590]
mov eax, dword [esp + 0x44]
xor ecx, dword [eax]
add eax, 4
mov dword [edx], ecx
add edx, 4
sub dword [esp + 0x24], 1
mov dword [esp + 0x44], eax
mov dword [esp + 0x20], edx
jne 0x4d92e6
lea eax, [ebp + 0x434]
lea ecx, [edi*4]
push ecx
push eax
lea eax, [ebp + 0x454]
push eax
call fcn.00470fe4
mov eax, dword [esp + 0x34]
add esp, 0xc
mov edx, dword [esp + 0x2c]
inc eax
mov ecx, dword [esp + 0x14]
add edx, 0x20
cmp eax, dword [ebp + 0x3d0]
mov dword [esp + 0x28], eax
lea eax, [ebp + 0x434]
mov dword [esp + 0x2c], edx
jl 0x4d92c0
xor ebx, ebx
mov dword [esp + 0x44], ebx
test edi, edi
jle 0x4d9479
mov edx, dword [esp + 0x14]
mov eax, dword [esp + 0x10]
sub edx, eax
mov esi, dword [esp + 0x48]
sub dword [esp + 0x18], eax
mov dword [esp + 0x14], edx
nop dword [eax + eax]
mov eax, dword [ebp + 0x3d0]
lea esi, [esi + 4]
lea eax, [ebx + eax*8]
mov ebx, dword [ebp + eax*4 + 8]
mov ecx, ebx
mov eax, dword [esp + 0x1c]
sar ecx, 0x18
add dword [esp + 0x1c], 4
movzx eax, byte [eax + 3]
xor cl, byte [eax + str.cw]
mov eax, dword [esp + 0x10]
add eax, edx
mov byte [esi - 4], cl
cdq
mov ecx, ebx
idiv edi
sar ecx, 0x10
movsx eax, word [ebp + edx*4 + 0x456]
movzx eax, al
xor cl, byte [eax + str.cw]
mov eax, dword [esp + 0x10]
cdq
idiv edi
mov byte [esi - 3], cl
mov ecx, ebx
sar ecx, 8
mov eax, dword [ebp + edx*4 + 0x454]
sar eax, 8
movzx eax, al
xor cl, byte [eax + str.cw]
mov eax, dword [esp + 0x18]
mov byte [esi - 2], cl
mov ecx, dword [esp + 0x10]
add eax, ecx
cdq
inc ecx
idiv edi
mov dword [esp + 0x10], ecx
movzx eax, byte [ebp + edx*4 + 0x454]
mov edx, dword [esp + 0x14]
mov al, byte [eax + str.cw]
xor al, bl
mov ebx, dword [esp + 0x44]
inc ebx
mov byte [esi - 1], al
mov dword [esp + 0x44], ebx
cmp ebx, edi
jl 0x4d93d0
pop esi
pop ebx
pop edi
pop ebp
add esp, 0x30
ret 8
push dword [0x51f910]
lea ecx, [esp + 0x2c]
call fcn.00457840
push 0x50c140
lea eax, [esp + 0x2c]
push eax
call sub.VCRUNTIME140.dll__CxxThrowException
int3