Function at 0x520860
Capabilities:
Encode data using xor
Hash data with crc32

Disassembly:
jmp 0x520c60
mov eax, dword [esp + 4]
push ebx
mov ebx, dword [esp + 0xc]
not eax
push edi
mov edi, dword [esp + 0x14]
test edi, edi
je 0x5209f1
test bl, 3
je 0x5209f1
movzx ecx, byte [ebx]
inc ebx
xor ecx, eax
shr eax, 8
movzx ecx, cl
xor eax, dword [ecx*4 + 0x5abf60]
sub edi, 1
jne 0x5209d4
push esi
cmp edi, 0x20
jb 0x520be2
push ebp
mov ebp, edi
shr ebp, 5
xor eax, dword [ebx]
mov ecx, eax
shr ecx, 0x10
movzx edx, cl
mov ecx, eax
shr ecx, 8
movzx ecx, cl
mov edx, dword [edx*4 + 0x5ac360]
xor edx, dword [ecx*4 + 0x5ac760]
mov ecx, eax
movzx eax, al
shr ecx, 0x18
xor edx, dword [ecx*4 + 0x5abf60]
xor edx, dword [eax*4 + 0x5acb60]
xor edx, dword [ebx + 4]
add ebx, 8
mov eax, edx
mov dword [esp + 0x18], ebx
shr eax, 0x10
movzx ecx, al
mov eax, edx
shr eax, 8
movzx eax, al
mov esi, dword [esp + 0x18]
mov ebx, dword [ecx*4 + 0x5ac360]
xor ebx, dword [eax*4 + 0x5ac760]
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x5abf60]
movzx eax, dl
xor ebx, dword [eax*4 + 0x5acb60]
xor ebx, dword [esi]
mov eax, ebx
shr eax, 0x10
movzx ecx, al
mov eax, ebx
shr eax, 8
movzx eax, al
mov edx, dword [ecx*4 + 0x5ac360]
xor edx, dword [eax*4 + 0x5ac760]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x5abf60]
movzx eax, bl
xor edx, dword [eax*4 + 0x5acb60]
xor edx, dword [esi + 4]
mov eax, edx
shr eax, 0x10
movzx ecx, al
mov eax, edx
shr eax, 8
movzx eax, al
mov ebx, dword [ecx*4 + 0x5ac360]
xor ebx, dword [eax*4 + 0x5ac760]
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x5abf60]
movzx eax, dl
xor ebx, dword [eax*4 + 0x5acb60]
xor ebx, dword [esi + 8]
mov eax, ebx
shr eax, 0x10
movzx ecx, al
mov eax, ebx
shr eax, 8
movzx eax, al
mov edx, dword [ecx*4 + 0x5ac360]
xor edx, dword [eax*4 + 0x5ac760]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x5abf60]
movzx eax, bl
xor edx, dword [eax*4 + 0x5acb60]
xor edx, dword [esi + 0xc]
mov eax, edx
shr eax, 0x10
movzx ecx, al
mov eax, edx
shr eax, 8
movzx eax, al
mov ebx, dword [ecx*4 + 0x5ac360]
xor ebx, dword [eax*4 + 0x5ac760]
sub edi, 0x20
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x5abf60]
movzx eax, dl
xor ebx, dword [eax*4 + 0x5acb60]
xor ebx, dword [esi + 0x10]
add esi, 0x14
mov eax, ebx
mov dword [esp + 0x18], esi
shr eax, 0x10
movzx ecx, al
mov eax, ebx
shr eax, 8
movzx eax, al
mov ecx, dword [ecx*4 + 0x5ac360]
xor ecx, dword [eax*4 + 0x5ac760]
mov eax, ebx
shr eax, 0x18
xor ecx, dword [eax*4 + 0x5abf60]
movzx eax, bl
mov ebx, esi
xor ecx, dword [eax*4 + 0x5acb60]
xor ecx, dword [ebx]
add ebx, 4
mov eax, ecx
mov dword [esp + 0x18], ecx
shr eax, 0x10
movzx edx, al
mov eax, ecx
shr eax, 8
movzx ecx, al
mov eax, dword [edx*4 + 0x5ac360]
mov edx, dword [esp + 0x18]
xor eax, dword [ecx*4 + 0x5ac760]
mov ecx, edx
shr ecx, 0x18
xor eax, dword [ecx*4 + 0x5abf60]
movzx ecx, dl
xor eax, dword [ecx*4 + 0x5acb60]
sub ebp, 1
jne 0x520a01
pop ebp
cmp edi, 4
jb 0x520c33
mov esi, edi
shr esi, 2
nop dword [eax]
xor eax, dword [ebx]
sub edi, 4
mov ecx, eax
add ebx, 4
shr ecx, 0x10
movzx edx, cl
mov ecx, eax
shr ecx, 8
movzx ecx, cl
mov edx, dword [edx*4 + 0x5ac360]
xor edx, dword [ecx*4 + 0x5ac760]
mov ecx, eax
shr ecx, 0x18
movzx eax, al
xor edx, dword [ecx*4 + 0x5abf60]
xor edx, dword [eax*4 + 0x5acb60]
mov eax, edx
sub esi, 1
jne 0x520bf0
pop esi
test edi, edi
je 0x520c52
movzx ecx, byte [ebx]
lea ebx, [ebx + 1]
xor ecx, eax
shr eax, 8
movzx ecx, cl
xor eax, dword [ecx*4 + 0x5abf60]
sub edi, 1
jne 0x520c38
pop edi
not eax
pop ebx
ret
mov eax, dword [esp + 8]
test eax, eax
jne 0x520c69
ret
mov dword [esp + 8], eax
jmp 0x5209c0