Function at 0x511f5e
Capabilities:
Encode data using xor
Hash data with crc32

Disassembly:
push ebx
push esi
mov esi, dword [esp + 0xc]
mov ebx, ecx
not ebx
test esi, esi
je 0x511f89
test dl, 3
je 0x511f89
movzx eax, byte [edx]
xor eax, ebx
shr ebx, 8
movzx eax, al
xor ebx, dword [eax*4 + 0x581300]
inc edx
sub esi, 1
jne 0x511f6c
push edi
cmp esi, 0x20
jb 0x512170
push ebp
mov ebp, esi
shr ebp, 5
xor ebx, dword [edx]
add edx, 4
mov eax, ebx
mov dword [esp + 0x14], edx
shr eax, 0x10
movzx ecx, al
mov eax, ebx
shr eax, 8
movzx eax, al
mov edi, dword [esp + 0x14]
mov edx, dword [ecx*4 + 0x581700]
xor edx, dword [eax*4 + 0x581b00]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x581300]
movzx eax, bl
xor edx, dword [eax*4 + 0x581f00]
xor edx, dword [edi]
mov eax, edx
shr eax, 0x10
movzx ecx, al
mov eax, edx
shr eax, 8
movzx eax, al
mov ebx, dword [ecx*4 + 0x581700]
xor ebx, dword [eax*4 + 0x581b00]
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x581300]
movzx eax, dl
xor ebx, dword [eax*4 + 0x581f00]
xor ebx, dword [edi + 4]
mov eax, ebx
shr eax, 0x10
movzx ecx, al
mov eax, ebx
shr eax, 8
movzx eax, al
mov edx, dword [ecx*4 + 0x581700]
xor edx, dword [eax*4 + 0x581b00]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x581300]
movzx eax, bl
xor edx, dword [eax*4 + 0x581f00]
xor edx, dword [edi + 8]
mov eax, edx
shr eax, 0x10
movzx ecx, al
mov eax, edx
shr eax, 8
movzx eax, al
mov ebx, dword [ecx*4 + 0x581700]
xor ebx, dword [eax*4 + 0x581b00]
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x581300]
movzx eax, dl
xor ebx, dword [eax*4 + 0x581f00]
xor ebx, dword [edi + 0xc]
mov eax, ebx
shr eax, 0x10
movzx ecx, al
mov eax, ebx
shr eax, 8
movzx eax, al
mov edx, dword [ecx*4 + 0x581700]
xor edx, dword [eax*4 + 0x581b00]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x581300]
movzx eax, bl
xor edx, dword [eax*4 + 0x581f00]
xor edx, dword [edi + 0x10]
mov eax, edx
shr eax, 0x10
movzx ecx, al
mov eax, edx
shr eax, 8
movzx eax, al
mov ebx, dword [ecx*4 + 0x581700]
xor ebx, dword [eax*4 + 0x581b00]
sub esi, 0x20
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x581300]
movzx eax, dl
xor ebx, dword [eax*4 + 0x581f00]
xor ebx, dword [edi + 0x14]
mov eax, ebx
shr eax, 0x10
movzx ecx, al
mov eax, ebx
shr eax, 8
movzx eax, al
mov edx, dword [ecx*4 + 0x581700]
xor edx, dword [eax*4 + 0x581b00]
mov eax, ebx
shr eax, 0x18
xor edx, dword [eax*4 + 0x581300]
movzx eax, bl
xor edx, dword [eax*4 + 0x581f00]
xor edx, dword [edi + 0x18]
add edi, 0x1c
mov eax, edx
mov dword [esp + 0x14], edi
shr eax, 0x10
movzx ecx, al
mov eax, edx
shr eax, 8
movzx eax, al
mov ebx, dword [ecx*4 + 0x581700]
xor ebx, dword [eax*4 + 0x581b00]
mov eax, edx
shr eax, 0x18
xor ebx, dword [eax*4 + 0x581300]
movzx eax, dl
mov edx, edi
xor ebx, dword [eax*4 + 0x581f00]
sub ebp, 1
jne 0x511f99
pop ebp
cmp esi, 4
jb 0x5121bd
mov edi, esi
shr edi, 2
xor ebx, dword [edx]
sub esi, 4
mov eax, ebx
add edx, 4
shr eax, 0x10
movzx ecx, al
mov eax, ebx
shr eax, 8
movzx eax, al
mov ecx, dword [ecx*4 + 0x581700]
xor ecx, dword [eax*4 + 0x581b00]
mov eax, ebx
shr eax, 0x18
xor ecx, dword [eax*4 + 0x581300]
movzx eax, bl
xor ecx, dword [eax*4 + 0x581f00]
mov ebx, ecx
sub edi, 1
jne 0x51217a
pop edi
test esi, esi
je 0x5121da
movzx eax, byte [edx]
xor eax, ebx
shr ebx, 8
movzx eax, al
xor ebx, dword [eax*4 + 0x581300]
inc edx
sub esi, 1
jne 0x5121c2
not ebx
pop esi
mov eax, ebx
pop ebx
ret