Function at 0x504dc0
Capabilities:
Encode data using xor
Hash data with crc32

Disassembly:
push ebp
mov ebp, esp
push ecx
push ebx
push edi
mov edi, dword [ebp + 8]
mov ebx, edx
not ecx
test edi, edi
je 0x504dee
test bl, 3
je 0x504dee
movzx eax, byte [ebx]
inc ebx
xor eax, ecx
shr ecx, 8
and eax, 0xff
xor ecx, dword [eax*4 + 0x532120]
dec edi
jne 0x504dd1
push esi
cmp edi, 0x20
jb 0x504ffd
mov eax, edi
shr eax, 5
mov dword [ebp - 4], eax
xor ecx, dword [ebx]
mov edx, ecx
mov eax, ecx
shr eax, 8
and eax, 0xff
shr edx, 0x10
and edx, 0xff
mov edx, dword [edx*4 + 0x532520]
xor edx, dword [eax*4 + 0x532920]
mov eax, ecx
shr eax, 0x18
xor edx, dword [eax*4 + 0x532120]
movzx eax, cl
xor edx, dword [eax*4 + 0x532d20]
xor edx, dword [ebx + 4]
add ebx, 8
mov ecx, edx
mov dword [ebp + 8], ebx
mov esi, dword [ebp + 8]
mov eax, edx
shr eax, 8
and eax, 0xff
shr ecx, 0x10
and ecx, 0xff
mov ebx, dword [ecx*4 + 0x532520]
xor ebx, dword [eax*4 + 0x532920]
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x532120]
movzx eax, dl
xor ebx, dword [eax*4 + 0x532d20]
xor ebx, dword [esi]
mov ecx, ebx
mov eax, ebx
shr eax, 8
and eax, 0xff
shr ecx, 0x10
and ecx, 0xff
mov edx, dword [ecx*4 + 0x532520]
xor edx, dword [eax*4 + 0x532920]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x532120]
movzx eax, bl
xor edx, dword [eax*4 + 0x532d20]
xor edx, dword [esi + 4]
mov ecx, edx
mov eax, edx
shr eax, 8
and eax, 0xff
shr ecx, 0x10
and ecx, 0xff
mov ebx, dword [ecx*4 + 0x532520]
xor ebx, dword [eax*4 + 0x532920]
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x532120]
movzx eax, dl
xor ebx, dword [eax*4 + 0x532d20]
xor ebx, dword [esi + 8]
mov ecx, ebx
mov eax, ebx
shr ecx, 0x10
shr eax, 8
and ecx, 0xff
and eax, 0xff
mov edx, dword [ecx*4 + 0x532520]
xor edx, dword [eax*4 + 0x532920]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x532120]
movzx eax, bl
xor edx, dword [eax*4 + 0x532d20]
xor edx, dword [esi + 0xc]
mov ecx, edx
mov eax, edx
shr ecx, 0x10
and ecx, 0xff
shr eax, 8
and eax, 0xff
mov ebx, dword [ecx*4 + 0x532520]
xor ebx, dword [eax*4 + 0x532920]
sub edi, 0x20
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x532120]
movzx eax, dl
xor ebx, dword [eax*4 + 0x532d20]
xor ebx, dword [esi + 0x10]
add esi, 0x14
mov ecx, ebx
mov dword [ebp + 8], esi
shr ecx, 0x10
mov eax, ebx
shr eax, 8
and ecx, 0xff
and eax, 0xff
mov edx, dword [ecx*4 + 0x532520]
xor edx, dword [eax*4 + 0x532920]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x532120]
movzx eax, bl
mov ebx, esi
xor edx, dword [eax*4 + 0x532d20]
xor edx, dword [ebx]
add ebx, 4
mov ecx, edx
mov eax, edx
shr ecx, 0x10
and ecx, 0xff
shr eax, 8
and eax, 0xff
mov ecx, dword [ecx*4 + 0x532520]
xor ecx, dword [eax*4 + 0x532920]
mov eax, edx
shr eax, 0x18
xor ecx, dword [eax*4 + 0x532120]
movzx eax, dl
xor ecx, dword [eax*4 + 0x532d20]
dec dword [ebp - 4]
jne 0x504e00
cmp edi, 4
jb 0x50504d
mov esi, edi
shr esi, 2
xor ecx, dword [ebx]
sub edi, 4
mov edx, ecx
mov eax, ecx
shr edx, 0x10
add ebx, 4
and edx, 0xff
shr eax, 8
and eax, 0xff
mov edx, dword [edx*4 + 0x532520]
xor edx, dword [eax*4 + 0x532920]
mov eax, ecx
shr eax, 0x18
xor edx, dword [eax*4 + 0x532120]
movzx eax, cl
xor edx, dword [eax*4 + 0x532d20]
mov ecx, edx
dec esi
jne 0x505007
pop esi
test edi, edi
je 0x50506c
movzx eax, byte [ebx]
lea ebx, [ebx + 1]
xor eax, ecx
shr ecx, 8
and eax, 0xff
xor ecx, dword [eax*4 + 0x532120]
dec edi
jne 0x505052
not ecx
pop edi
mov eax, ecx
pop ebx
mov esp, ebp
pop ebp
ret