Function at 0x53c6b7
Capabilities:
Encode data using xor
Hash data with crc32

Disassembly:
sub esp, 0x2c
push ebx
mov ebx, edx
push esi
mov esi, ecx
test ebx, ebx
jne 0x53c6cb
xor eax, eax
jmp 0x53c97c
push edi
mov edi, dword [esp + 0x3c]
not esi
cmp edi, 0x17
jb 0x53c8a7
test bl, 3
je 0x53c6f8
movzx eax, byte [ebx]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x6d27c0]
inc ebx
sub edi, 1
jne 0x53c6db
push ebp
xor edx, edx
mov eax, edi
push 0x14
pop ecx
div ecx
xor ebp, ebp
mov edx, eax
mov dword [esp + 0x18], ebp
imul ecx, edx, 0xffffffec
mov eax, ebp
mov dword [esp + 0x10], eax
add edi, ecx
mov ecx, ebp
sub edx, 1
mov dword [esp + 0x40], edi
mov dword [esp + 0x14], ecx
mov dword [esp + 0x2c], edx
je 0x53c862
jmp 0x53c736
mov eax, dword [esp + 0x10]
mov ecx, dword [esp + 0x14]
mov edx, dword [ebx]
mov edi, 0x100
xor edx, esi
mov esi, dword [ebx + 4]
xor esi, ebp
mov dword [esp + 0x30], edx
mov dword [esp + 0x1c], esi
mov esi, dword [ebx + 8]
xor esi, eax
mov eax, dword [ebx + 0xc]
xor eax, ecx
mov dword [esp + 0x20], esi
mov dword [esp + 0x24], eax
mov ecx, dword [ebx + 0x10]
add ebx, 0x14
xor ecx, dword [esp + 0x18]
movzx eax, dl
mov dword [esp + 0x38], ebx
mov dword [esp + 0x34], ecx
mov esi, dword [eax*4 + 0x6d2fc0]
mov eax, dword [esp + 0x1c]
movzx eax, al
mov ebp, dword [eax*4 + 0x6d2fc0]
mov eax, dword [esp + 0x20]
movzx eax, al
mov eax, dword [eax*4 + 0x6d2fc0]
mov dword [esp + 0x10], eax
mov eax, dword [esp + 0x24]
mov edx, dword [esp + 0x10]
movzx eax, al
mov eax, dword [eax*4 + 0x6d2fc0]
mov dword [esp + 0x14], eax
mov ebx, dword [esp + 0x14]
movzx eax, cl
mov eax, dword [eax*4 + 0x6d2fc0]
mov dword [esp + 0x18], eax
xor eax, eax
inc eax
mov dword [esp + 0x28], eax
mov ecx, eax
mov eax, dword [esp + 0x30]
shl ecx, 3
shr eax, cl
movzx eax, al
add eax, edi
xor esi, dword [eax*4 + 0x6d2fc0]
mov eax, dword [esp + 0x1c]
shr eax, cl
movzx eax, al
add eax, edi
xor ebp, dword [eax*4 + 0x6d2fc0]
mov eax, dword [esp + 0x20]
shr eax, cl
movzx eax, al
add eax, edi
xor edx, dword [eax*4 + 0x6d2fc0]
mov eax, dword [esp + 0x24]
shr eax, cl
movzx eax, al
add eax, edi
xor ebx, dword [eax*4 + 0x6d2fc0]
mov eax, dword [esp + 0x34]
shr eax, cl
mov ecx, dword [esp + 0x18]
movzx eax, al
add eax, edi
add edi, 0x100
xor ecx, dword [eax*4 + 0x6d2fc0]
mov eax, dword [esp + 0x28]
inc eax
mov dword [esp + 0x18], ecx
mov dword [esp + 0x28], eax
cmp edi, 0x400
jl 0x53c7c9
sub dword [esp + 0x2c], 1
mov dword [esp + 0x14], ebx
mov ebx, dword [esp + 0x38]
mov dword [esp + 0x10], edx
jne 0x53c72e
mov edi, dword [esp + 0x40]
mov ecx, dword [ebx]
xor ecx, esi
call fcn.0053c69f
xor eax, dword [ebx + 4]
xor eax, ebp
mov ecx, eax
call fcn.0053c69f
xor eax, dword [ebx + 8]
xor eax, dword [esp + 0x10]
mov ecx, eax
call fcn.0053c69f
xor eax, dword [ebx + 0xc]
xor eax, dword [esp + 0x14]
mov ecx, eax
call fcn.0053c69f
xor eax, dword [ebx + 0x10]
xor eax, dword [esp + 0x18]
mov ecx, eax
call fcn.0053c69f
mov esi, eax
add ebx, 0x14
pop ebp
cmp edi, 8
jb 0x53c95b
mov ecx, edi
shr ecx, 3
movzx eax, byte [ebx]
sub edi, 8
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x6d27c0]
movzx eax, byte [ebx + 1]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x6d27c0]
movzx eax, byte [ebx + 2]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x6d27c0]
movzx eax, byte [ebx + 3]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x6d27c0]
movzx eax, byte [ebx + 4]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x6d27c0]
movzx eax, byte [ebx + 5]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x6d27c0]
movzx eax, byte [ebx + 6]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x6d27c0]
movzx eax, byte [ebx + 7]
add ebx, 8
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x6d27c0]
sub ecx, 1
jne 0x53c8b5
test edi, edi
je 0x53c977
movzx eax, byte [ebx]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x6d27c0]
inc ebx
sub edi, 1
jne 0x53c95f
not esi
mov eax, esi
pop edi
pop esi
pop ebx
add esp, 0x2c
ret