Function at 0x42992d
Capabilities:
Encode data using xor
Hash data with crc32

Disassembly:
push ebx
push ebp
push esi
mov esi, dword [esp + 0x10]
mov ebx, ecx
not ebx
mov ebp, 0xff
test esi, esi
je 0x428acc
test dl, 3
je 0x428acc
movzx eax, byte [edx]
xor eax, ebx
and eax, ebp
shr ebx, 8
xor ebx, dword [eax*4 + 0x43b4c0]
inc edx
dec esi
jne 0x428ab2
push edi
cmp esi, 0x20
jb 0x428ccb
mov ebp, esi
shr ebp, 5
mov edi, 0xff
xor ebx, dword [edx]
add edx, 4
mov ecx, ebx
shr ecx, 0x10
mov dword [esp + 0x14], edx
and ecx, edi
mov eax, ebx
mov edx, dword [ecx*4 + 0x43b8c0]
shr eax, 8
and eax, edi
mov edi, dword [esp + 0x14]
xor edx, dword [eax*4 + 0x43bcc0]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x43b4c0]
movzx eax, bl
mov ebx, 0xff
xor edx, dword [eax*4 + 0x43c0c0]
xor edx, dword [edi]
mov ecx, edx
mov eax, edx
shr eax, 8
and eax, ebx
shr ecx, 0x10
and ecx, ebx
mov ebx, dword [ecx*4 + 0x43b8c0]
xor ebx, dword [eax*4 + 0x43bcc0]
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x43b4c0]
movzx eax, dl
mov edx, 0xff
xor ebx, dword [eax*4 + 0x43c0c0]
xor ebx, dword [edi + 4]
mov ecx, ebx
shr ecx, 0x10
and ecx, edx
mov eax, ebx
shr eax, 8
and eax, edx
mov edx, dword [ecx*4 + 0x43b8c0]
xor edx, dword [eax*4 + 0x43bcc0]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x43b4c0]
movzx eax, bl
mov ebx, 0xff
xor edx, dword [eax*4 + 0x43c0c0]
xor edx, dword [edi + 8]
mov ecx, edx
mov eax, edx
shr eax, 8
and eax, ebx
shr ecx, 0x10
and ecx, ebx
mov ebx, dword [ecx*4 + 0x43b8c0]
xor ebx, dword [eax*4 + 0x43bcc0]
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x43b4c0]
movzx eax, dl
mov edx, 0xff
xor ebx, dword [eax*4 + 0x43c0c0]
xor ebx, dword [edi + 0xc]
mov ecx, ebx
shr ecx, 0x10
and ecx, edx
mov eax, ebx
shr eax, 8
and eax, edx
mov edx, dword [ecx*4 + 0x43b8c0]
xor edx, dword [eax*4 + 0x43bcc0]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x43b4c0]
movzx eax, bl
mov ebx, 0xff
xor edx, dword [eax*4 + 0x43c0c0]
xor edx, dword [edi + 0x10]
mov ecx, edx
shr ecx, 0x10
and ecx, ebx
mov eax, edx
shr eax, 8
and eax, ebx
mov ebx, dword [ecx*4 + 0x43b8c0]
xor ebx, dword [eax*4 + 0x43bcc0]
mov eax, edx
shr eax, 0x18
add edi, 0x1c
xor ebx, dword [eax*4 + 0x43b4c0]
movzx eax, dl
mov edx, 0xff
xor ebx, dword [eax*4 + 0x43c0c0]
mov dword [esp + 0x14], edi
xor ebx, dword [edi - 8]
sub esi, 0x20
mov ecx, ebx
shr ecx, 0x10
and ecx, edx
mov eax, ebx
shr eax, 8
and eax, edx
mov edx, dword [ecx*4 + 0x43b8c0]
xor edx, dword [eax*4 + 0x43bcc0]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x43b4c0]
movzx eax, bl
xor edx, dword [eax*4 + 0x43c0c0]
xor edx, dword [edi - 4]
mov edi, 0xff
mov ecx, edx
shr ecx, 0x10
mov eax, edx
shr eax, 8
and eax, edi
and ecx, edi
mov ebx, dword [ecx*4 + 0x43b8c0]
xor ebx, dword [eax*4 + 0x43bcc0]
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x43b4c0]
movzx eax, dl
mov edx, dword [esp + 0x14]
xor ebx, dword [eax*4 + 0x43c0c0]
dec ebp
jne 0x428ae0
mov ebp, edi
cmp esi, 4
jb 0x428d14
mov edi, esi
shr edi, 2
xor ebx, dword [edx]
add edx, 4
mov ecx, ebx
shr ecx, 0x10
and ecx, ebp
mov eax, ebx
mov ecx, dword [ecx*4 + 0x43b8c0]
shr eax, 8
and eax, ebp
sub esi, 4
xor ecx, dword [eax*4 + 0x43bcc0]
mov eax, ebx
shr eax, 0x18
xor ecx, dword [eax*4 + 0x43b4c0]
movzx eax, bl
xor ecx, dword [eax*4 + 0x43c0c0]
mov ebx, ecx
dec edi
jne 0x428cd5
pop edi
test esi, esi
je 0x428d2e
movzx eax, byte [edx]
xor eax, ebx
and eax, ebp
shr ebx, 8
xor ebx, dword [eax*4 + 0x43b4c0]
inc edx
dec esi
jne 0x428d19
pop esi
not ebx
pop ebp
mov eax, ebx
pop ebx
ret
test edx, edx
jne 0x429934
xor eax, eax
ret
jmp 0x428a9e