Function at 0x4dc9a8
Capabilities:
Encode data using xor
Hash data with crc32

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x30
push ebx
mov ebx, edx
push esi
mov esi, ecx
test ebx, ebx
jne 0x4dc9bf
xor eax, eax
jmp 0x4dcc53
push edi
mov edi, dword [ebp + 8]
not esi
cmp edi, 0x17
jb 0x4dcb7e
test bl, 3
je 0x4dc9eb
movzx eax, byte [ebx]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x534dd0]
inc ebx
sub edi, 1
jne 0x4dc9ce
xor edx, edx
mov eax, edi
push 0x14
pop ecx
div ecx
mov edx, eax
xor eax, eax
imul ecx, edx, 0xffffffec
mov dword [ebp - 0x10], eax
mov dword [ebp - 4], eax
mov dword [ebp - 8], eax
mov dword [ebp - 0xc], eax
add edi, ecx
sub edx, 1
mov dword [ebp + 8], edi
mov ecx, eax
mov dword [ebp - 0x24], edx
je 0x4dcb3c
xor edi, edi
jmp 0x4dca24
mov ecx, dword [ebp - 4]
mov eax, dword [ebp - 0xc]
mov edx, dword [ebx]
xor edx, esi
mov esi, dword [ebx + 4]
xor esi, edi
mov dword [ebp - 0x28], edx
mov dword [ebp - 0x14], esi
mov esi, dword [ebx + 8]
xor esi, ecx
mov ecx, dword [ebx + 0xc]
xor ecx, dword [ebp - 8]
mov dword [ebp - 0x18], esi
mov esi, dword [ebx + 0x10]
add ebx, 0x14
xor esi, eax
mov dword [ebp - 0x30], ebx
movzx eax, dl
mov edx, 0x100
mov dword [ebp - 0x1c], esi
mov dword [ebp - 0x2c], ecx
mov esi, dword [eax*4 + 0x536650]
mov eax, dword [ebp - 0x14]
movzx eax, al
mov edi, dword [eax*4 + 0x536650]
mov eax, dword [ebp - 0x18]
movzx eax, al
mov eax, dword [eax*4 + 0x536650]
mov dword [ebp - 4], eax
mov ebx, dword [ebp - 4]
movzx eax, cl
mov eax, dword [eax*4 + 0x536650]
mov dword [ebp - 8], eax
mov eax, dword [ebp - 0x1c]
movzx eax, al
mov eax, dword [eax*4 + 0x536650]
mov dword [ebp - 0xc], eax
xor eax, eax
inc eax
mov dword [ebp - 0x20], eax
mov ecx, eax
mov eax, dword [ebp - 0x28]
shl ecx, 3
shr eax, cl
movzx eax, al
add eax, edx
xor esi, dword [eax*4 + 0x536650]
mov eax, dword [ebp - 0x14]
shr eax, cl
movzx eax, al
add eax, edx
xor edi, dword [eax*4 + 0x536650]
mov eax, dword [ebp - 0x18]
shr eax, cl
movzx eax, al
add eax, edx
mov dword [ebp - 0x10], edi
mov edi, dword [ebp - 8]
xor ebx, dword [eax*4 + 0x536650]
mov eax, dword [ebp - 0x2c]
shr eax, cl
movzx eax, al
add eax, edx
xor edi, dword [eax*4 + 0x536650]
mov eax, dword [ebp - 0x1c]
shr eax, cl
mov ecx, dword [ebp - 0xc]
movzx eax, al
add eax, edx
mov dword [ebp - 8], edi
mov edi, dword [ebp - 0x10]
add edx, 0x100
xor ecx, dword [eax*4 + 0x536650]
mov eax, dword [ebp - 0x20]
inc eax
mov dword [ebp - 0xc], ecx
mov dword [ebp - 0x20], eax
cmp edx, 0x400
jl 0x4dcaa4
sub dword [ebp - 0x24], 1
mov dword [ebp - 4], ebx
mov ebx, dword [ebp - 0x30]
jne 0x4dca1e
mov edi, dword [ebp + 8]
mov ecx, dword [ebx]
xor ecx, esi
call fcn.004dc990
xor eax, dword [ebx + 4]
xor eax, dword [ebp - 0x10]
mov ecx, eax
call fcn.004dc990
xor eax, dword [ebx + 8]
xor eax, dword [ebp - 4]
mov ecx, eax
call fcn.004dc990
xor eax, dword [ebx + 0xc]
xor eax, dword [ebp - 8]
mov ecx, eax
call fcn.004dc990
xor eax, dword [ebx + 0x10]
xor eax, dword [ebp - 0xc]
mov ecx, eax
call fcn.004dc990
mov esi, eax
add ebx, 0x14
cmp edi, 8
jb 0x4dcc32
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 + 0x534dd0]
movzx eax, byte [ebx + 1]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x534dd0]
movzx eax, byte [ebx + 2]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x534dd0]
movzx eax, byte [ebx + 3]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x534dd0]
movzx eax, byte [ebx + 4]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x534dd0]
movzx eax, byte [ebx + 5]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x534dd0]
movzx eax, byte [ebx + 6]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x534dd0]
movzx eax, byte [ebx + 7]
add ebx, 8
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x534dd0]
sub ecx, 1
jne 0x4dcb8c
test edi, edi
je 0x4dcc4e
movzx eax, byte [ebx]
xor eax, esi
shr esi, 8
movzx eax, al
xor esi, dword [eax*4 + 0x534dd0]
inc ebx
sub edi, 1
jne 0x4dcc36
not esi
mov eax, esi
pop edi
pop esi
pop ebx
leave
ret