Function at 0x437d5e
Capabilities:
Encode data using xor
Hash data with crc32

Disassembly:
mov edx, dword [esp + 8]
test edx, edx
je 0x437d68
jmp 0x437d6b
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 0x437da6
test dl, 3
je 0x437da6
lea esi, [esi]
movzx eax, byte [edx]
inc edx
xor al, bl
movzx ecx, al
shr ebx, 8
mov esi, dword [ecx*4 + 0x435d5e]
xor ebx, esi
dec edi
je 0x437da6
test dl, 3
jne 0x437d87
lea esi, [esi]
cmp edi, 0x1f
mov esi, edx
jbe 0x437fa0
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 + 0x43655e]
mov eax, dword [ecx*4 + 0x43695e]
shr ebx, 0x10
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x43615e]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435d5e]
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 + 0x43655e]
shr ebx, 0x10
mov eax, dword [ecx*4 + 0x43695e]
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x43615e]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435d5e]
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 + 0x43655e]
shr ebx, 0x10
mov eax, dword [ecx*4 + 0x43695e]
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x43615e]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435d5e]
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 + 0x43655e]
mov eax, dword [ecx*4 + 0x43695e]
shr ebx, 0x10
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x43615e]
mov eax, ebx
xor edx, ecx
shr eax, 8
mov ebx, edx
mov ecx, dword [eax*4 + 0x435d5e]
mov edx, dword [esi]
add esi, 4
xor ebx, ecx
xor ebx, edx
movzx ecx, bl
movzx eax, bh
mov edx, dword [eax*4 + 0x43655e]
shr ebx, 0x10
mov eax, dword [ecx*4 + 0x43695e]
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x43615e]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435d5e]
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 + 0x43655e]
shr ebx, 0x10
mov eax, dword [ecx*4 + 0x43695e]
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x43615e]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435d5e]
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 + 0x43655e]
mov eax, dword [ecx*4 + 0x43695e]
shr ebx, 0x10
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x43615e]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435d5e]
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 + 0x43655e]
mov eax, dword [ecx*4 + 0x43695e]
xor edx, eax
shr ebx, 0x10
sub edi, 0x20
movzx eax, bl
mov ecx, dword [eax*4 + 0x43615e]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435d5e]
mov ebx, edx
xor ebx, ecx
cmp edi, 0x1f
ja 0x437db4
cmp edi, 3
jbe 0x437feb
jmp 0x437fa7
mov edx, dword [esi]
sub edi, 4
add esi, 4
xor ebx, edx
movzx ecx, bl
movzx eax, bh
mov edx, dword [eax*4 + 0x43655e]
shr ebx, 0x10
mov eax, dword [ecx*4 + 0x43695e]
xor edx, eax
movzx eax, bl
mov ecx, dword [eax*4 + 0x43615e]
mov eax, ebx
shr eax, 8
xor edx, ecx
mov ecx, dword [eax*4 + 0x435d5e]
mov ebx, edx
xor ebx, ecx
cmp edi, 3
ja 0x437fa7
test edi, edi
mov edx, esi
je 0x43800b
lea esi, [esi]
movzx eax, byte [edx]
inc edx
xor al, bl
movzx ecx, al
shr ebx, 8
mov esi, dword [ecx*4 + 0x435d5e]
xor ebx, esi
dec edi
jne 0x437ff3
not ebx
mov eax, ebx
pop ebx
pop esi
pop edi
ret