Function at 0x437dc0
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 0x437dee
test bl, 3
je 0x437dee
movzx eax, byte [ebx]
xor eax, ecx
and eax, 0xff
shr ecx, 8
xor ecx, dword [eax*4 + 0x57a738]
inc ebx
dec edi
jne 0x437dd1
push esi
cmp edi, 0x20
jb 0x437ffe
mov eax, edi
shr eax, 5
mov dword [ebp - 4], eax
xor ecx, dword [ebx]
add ebx, 8
mov edx, ecx
shr edx, 0x10
mov eax, ecx
shr eax, 8
and eax, 0xff
and edx, 0xff
mov dword [ebp + 8], ebx
mov edx, dword [edx*4 + 0x57ab38]
xor edx, dword [eax*4 + 0x57af38]
mov eax, ecx
shr eax, 0x18
mov esi, dword [ebp + 8]
xor edx, dword [eax*4 + 0x57a738]
movzx eax, cl
xor edx, dword [eax*4 + 0x57b338]
xor edx, dword [ebx - 4]
mov ecx, edx
shr ecx, 0x10
and ecx, 0xff
mov eax, edx
mov ebx, dword [ecx*4 + 0x57ab38]
shr eax, 8
and eax, 0xff
xor ebx, dword [eax*4 + 0x57af38]
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x57a738]
movzx eax, dl
xor ebx, dword [eax*4 + 0x57b338]
xor ebx, dword [esi]
mov ecx, ebx
shr ecx, 0x10
and ecx, 0xff
mov eax, ebx
mov edx, dword [ecx*4 + 0x57ab38]
shr eax, 8
and eax, 0xff
xor edx, dword [eax*4 + 0x57af38]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x57a738]
movzx eax, bl
xor edx, dword [eax*4 + 0x57b338]
xor edx, dword [esi + 4]
mov ecx, edx
shr ecx, 0x10
and ecx, 0xff
mov eax, edx
mov ebx, dword [ecx*4 + 0x57ab38]
shr eax, 8
and eax, 0xff
xor ebx, dword [eax*4 + 0x57af38]
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x57a738]
movzx eax, dl
xor ebx, dword [eax*4 + 0x57b338]
xor ebx, dword [esi + 8]
mov ecx, ebx
shr ecx, 0x10
and ecx, 0xff
mov eax, ebx
mov edx, dword [ecx*4 + 0x57ab38]
shr eax, 8
and eax, 0xff
xor edx, dword [eax*4 + 0x57af38]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x57a738]
movzx eax, bl
xor edx, dword [eax*4 + 0x57b338]
xor edx, dword [esi + 0xc]
mov ecx, edx
shr ecx, 0x10
and ecx, 0xff
mov eax, edx
mov ebx, dword [ecx*4 + 0x57ab38]
shr eax, 8
and eax, 0xff
xor ebx, dword [eax*4 + 0x57af38]
mov eax, edx
shr eax, 0x18
add esi, 0x14
xor ebx, dword [eax*4 + 0x57a738]
movzx eax, dl
sub edi, 0x20
xor ebx, dword [eax*4 + 0x57b338]
mov dword [ebp + 8], esi
xor ebx, dword [esi - 4]
mov ecx, ebx
shr ecx, 0x10
and ecx, 0xff
mov eax, ebx
mov edx, dword [ecx*4 + 0x57ab38]
shr eax, 8
and eax, 0xff
xor edx, dword [eax*4 + 0x57af38]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x57a738]
movzx eax, bl
mov ebx, esi
xor edx, dword [eax*4 + 0x57b338]
add ebx, 4
xor edx, dword [ebx - 4]
mov ecx, edx
shr ecx, 0x10
and ecx, 0xff
mov eax, edx
mov ecx, dword [ecx*4 + 0x57ab38]
shr eax, 8
and eax, 0xff
xor ecx, dword [eax*4 + 0x57af38]
mov eax, edx
shr eax, 0x18
xor ecx, dword [eax*4 + 0x57a738]
movzx eax, dl
xor ecx, dword [eax*4 + 0x57b338]
dec dword [ebp - 4]
jne 0x437e00
cmp edi, 4
jb 0x43804e
mov esi, edi
shr esi, 2
xor ecx, dword [ebx]
add ebx, 4
mov edx, ecx
shr edx, 0x10
and edx, 0xff
mov eax, ecx
mov edx, dword [edx*4 + 0x57ab38]
shr eax, 8
and eax, 0xff
sub edi, 4
xor edx, dword [eax*4 + 0x57af38]
mov eax, ecx
shr eax, 0x18
xor edx, dword [eax*4 + 0x57a738]
movzx eax, cl
xor edx, dword [eax*4 + 0x57b338]
mov ecx, edx
dec esi
jne 0x438008
pop esi
test edi, edi
je 0x43806d
movzx eax, byte [ebx]
xor eax, ecx
and eax, 0xff
shr ecx, 8
xor ecx, dword [eax*4 + 0x57a738]
lea ebx, [ebx + 1]
dec edi
jne 0x438053
not ecx
pop edi
mov eax, ecx
pop ebx
mov esp, ebp
pop ebp
ret