Function at 0x437a20
Capabilities:
Encode data using xor
Hash data with crc32

Disassembly:
mov edx, dword [esp + 8]
test edx, edx
je 0x437a2a
jmp 0x437a2d
xor eax, eax
ret
push edi
push esi
push ebx
mov edi, dword [esp + 0x18]
mov ebx, dword [esp + 0x10]
mov edx, dword [esp + 0x14]
test edi, edi
not ebx
je 0x437a68
test dl, 3
je 0x437a68
lea esi, [esi]
movzx eax, byte [edx]
inc edx
xor al, bl
movzx ecx, al
shr ebx, 8
mov esi, dword [ecx*4 + 0x435a20]
xor ebx, esi
dec edi
je 0x437a68
test dl, 3
jne 0x437a49
lea esi, [esi]
cmp edi, 0x1f
mov esi, edx
jbe 0x437c62
nop
lea esi, [esi]
mov edx, dword [esi]
add esi, 4
xor ebx, edx
movzx ecx, bl
movzx eax, bh
mov edx, dword [eax*4 + 0x436220]
mov eax, dword [ecx*4 + 0x436620]
shr ebx, 0x10
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x435e20]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435a20]
mov ebx, edx
mov edx, dword [esi]
xor ebx, ecx
add esi, 4
xor ebx, edx
movzx ecx, bl
movzx eax, bh
mov edx, dword [eax*4 + 0x436220]
shr ebx, 0x10
mov eax, dword [ecx*4 + 0x436620]
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x435e20]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435a20]
mov ebx, edx
mov edx, dword [esi]
add esi, 4
xor ebx, ecx
xor ebx, edx
movzx ecx, bl
movzx eax, bh
mov edx, dword [eax*4 + 0x436220]
shr ebx, 0x10
mov eax, dword [ecx*4 + 0x436620]
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x435e20]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435a20]
mov ebx, edx
mov edx, dword [esi]
add esi, 4
xor ebx, ecx
xor ebx, edx
movzx ecx, bl
movzx eax, bh
mov edx, dword [eax*4 + 0x436220]
mov eax, dword [ecx*4 + 0x436620]
shr ebx, 0x10
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x435e20]
mov eax, ebx
xor edx, ecx
shr eax, 8
mov ebx, edx
mov ecx, dword [eax*4 + 0x435a20]
mov edx, dword [esi]
add esi, 4
xor ebx, ecx
xor ebx, edx
movzx ecx, bl
movzx eax, bh
mov edx, dword [eax*4 + 0x436220]
shr ebx, 0x10
mov eax, dword [ecx*4 + 0x436620]
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x435e20]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435a20]
mov ebx, edx
mov edx, dword [esi]
add esi, 4
xor ebx, ecx
xor ebx, edx
movzx ecx, bl
movzx eax, bh
mov edx, dword [eax*4 + 0x436220]
shr ebx, 0x10
mov eax, dword [ecx*4 + 0x436620]
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x435e20]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435a20]
mov ebx, edx
mov edx, dword [esi]
add esi, 4
xor ebx, ecx
xor ebx, edx
movzx ecx, bl
movzx eax, bh
mov edx, dword [eax*4 + 0x436220]
mov eax, dword [ecx*4 + 0x436620]
shr ebx, 0x10
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x435e20]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435a20]
mov ebx, edx
mov edx, dword [esi]
xor ebx, ecx
add esi, 4
xor ebx, edx
movzx ecx, bl
movzx eax, bh
mov edx, dword [eax*4 + 0x436220]
mov eax, dword [ecx*4 + 0x436620]
xor edx, eax
shr ebx, 0x10
sub edi, 0x20
movzx eax, bl
mov ecx, dword [eax*4 + 0x435e20]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435a20]
mov ebx, edx
xor ebx, ecx
cmp edi, 0x1f
ja 0x437a76
cmp edi, 3
jbe 0x437cad
jmp 0x437c69
mov edx, dword [esi]
sub edi, 4
add esi, 4
xor ebx, edx
movzx ecx, bl
movzx eax, bh
mov edx, dword [eax*4 + 0x436220]
shr ebx, 0x10
mov eax, dword [ecx*4 + 0x436620]
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x435e20]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435a20]
mov ebx, edx
xor ebx, ecx
cmp edi, 3
ja 0x437c69
test edi, edi
mov edx, esi
je 0x437ccd
lea esi, [esi]
movzx eax, byte [edx]
inc edx
xor al, bl
movzx ecx, al
shr ebx, 8
mov esi, dword [ecx*4 + 0x435a20]
xor ebx, esi
dec edi
jne 0x437cb5
not ebx
mov eax, ebx
pop ebx
pop esi
pop edi
ret