Function at 0x4ff7a0
Capabilities:
Encode data using xor

Disassembly:
mov eax, 0x18
call fcn.0055ffd0
push ebp
mov ebp, dword [esp + 0x2c]
xor ecx, ecx
push esi
mov esi, dword [esp + 0x24]
mov eax, dword [esi + 0x170]
mov dword [esp + 0x14], eax
mov eax, dword [esi + 0x174]
mov dword [esp + 0x10], eax
mov eax, ebp
add eax, dword [esi + 0x38]
adc ecx, dword [esi + 0x3c]
cmp ecx, 0xf
ja 0x4ffb0e
jb 0x4ff7e6
cmp eax, 0xffffffe0
ja 0x4ffb0e
cmp dword [esi + 0x16c], 0
mov edx, dword [esi + 0x168]
mov dword [esi + 0x38], eax
mov dword [esi + 0x3c], ecx
mov dword [esp + 8], edx
je 0x4ff85b
test ebp, ebp
jne 0x4ff821
lea eax, [esi + 0x60]
push eax
lea eax, [esi + 0x40]
push eax
call fcn.00500650
add esp, 8
mov dword [esi + 0x16c], ebp
xor eax, eax
pop esi
pop ebp
add esp, 0x18
ret
movups xmm0, xmmword [esi + 0x40]
mov edx, 0x10
mov dword [esp + 8], edx
movups xmmword [esi + 0x178], xmm0
mov dword [esi + 0x40], 0
mov dword [esi + 0x44], 0
mov dword [esi + 0x48], 0
mov dword [esi + 0x4c], 0
mov dword [esi + 0x16c], 0
movzx ecx, byte [esi + 0xc]
movzx eax, byte [esi + 0xd]
shl ecx, 8
or ecx, eax
movzx eax, byte [esi + 0xe]
shl ecx, 8
or ecx, eax
movzx eax, byte [esi + 0xf]
shl ecx, 8
or ecx, eax
mov dword [esp + 0xc], ecx
mov ecx, edx
push ebx
mov ebx, dword [esp + 0x30]
and ecx, 0xf
push edi
mov edi, dword [esp + 0x30]
mov dword [esp + 0x24], ecx
je 0x4ff8e0
test ebp, ebp
je 0x4ff8ba
mov al, byte [ecx + esi + 0x10]
dec ebp
xor al, byte [edi]
inc ecx
mov byte [ebx], al
inc edi
mov byte [edx + esi + 0x178], al
inc ebx
inc edx
mov dword [esp + 0x38], ebp
and ecx, 0xf
mov dword [esp + 0x24], ecx
jne 0x4ff893
jmp 0x4ff8c2
test ecx, ecx
jne 0x4ffafe
push edx
lea eax, [esi + 0x178]
push eax
lea eax, [esi + 0x60]
push eax
lea eax, [esi + 0x40]
push eax
call fcn.00500410
add esp, 0x10
xor edx, edx
mov dword [esp + 0x10], edx
cmp ebp, 0x10
jb 0x4ff909
test edx, edx
je 0x4ff909
push edx
lea eax, [esi + 0x178]
push eax
lea eax, [esi + 0x60]
push eax
lea eax, [esi + 0x40]
push eax
call fcn.00500410
add esp, 0x10
mov dword [esp + 0x10], 0
cmp ebp, 0xc00
jb 0x4ff9c9
mov eax, 0xaaaaaaab
lea ecx, [esi + 0x10]
mul ebp
shr edx, 0xb
mov dword [esp + 0x20], edx
mov ebp, 0xc0
nop dword [eax + eax]
push dword [esp + 0x18]
push ecx
push esi
call dword [esp + 0x28]
mov ecx, dword [esp + 0x20]
add esp, 0xc
inc ecx
mov eax, ecx
mov byte [esi + 0xf], cl
shr eax, 0x18
mov byte [esi + 0xc], al
mov eax, ecx
shr eax, 0x10
mov byte [esi + 0xd], al
mov eax, ecx
shr eax, 8
mov byte [esi + 0xe], al
mov eax, dword [esi + 0x10]
xor eax, dword [edi]
mov dword [esp + 0x14], ecx
lea ecx, [esi + 0x10]
mov dword [ebx], eax
mov eax, dword [edi + 4]
xor eax, dword [esi + 0x14]
mov dword [ebx + 4], eax
mov eax, dword [edi + 8]
xor eax, dword [esi + 0x18]
mov dword [ebx + 8], eax
mov eax, dword [edi + 0xc]
add edi, 0x10
xor eax, dword [esi + 0x1c]
mov dword [ebx + 0xc], eax
add ebx, 0x10
sub ebp, 1
jne 0x4ff930
push 0xc00
lea eax, [ebx - 0xc00]
push eax
lea eax, [esi + 0x60]
push eax
lea eax, [esi + 0x40]
push eax
call fcn.00500410
mov ebp, dword [esp + 0x48]
lea ecx, [esi + 0x10]
sub ebp, 0xc00
add esp, 0x10
sub dword [esp + 0x20], 1
mov dword [esp + 0x38], ebp
jne 0x4ff926
mov ecx, ebp
and ecx, 0xfffffff0
mov dword [esp + 0x20], ecx
je 0x4ffa70
cmp ebp, 0x10
jb 0x4ffa5a
mov eax, ebp
lea ecx, [esi + 0x10]
shr eax, 4
mov dword [esp + 0x38], eax
nop dword [eax]
push dword [esp + 0x18]
push ecx
push esi
call dword [esp + 0x28]
mov ecx, dword [esp + 0x20]
add esp, 0xc
inc ecx
sub ebp, 0x10
mov eax, ecx
mov byte [esi + 0xf], cl
shr eax, 0x18
mov byte [esi + 0xc], al
mov eax, ecx
shr eax, 0x10
mov byte [esi + 0xd], al
mov eax, ecx
shr eax, 8
mov byte [esi + 0xe], al
mov eax, dword [esi + 0x10]
xor eax, dword [edi]
mov dword [esp + 0x14], ecx
lea ecx, [esi + 0x10]
mov dword [ebx], eax
mov eax, dword [edi + 4]
xor eax, dword [esi + 0x14]
mov dword [ebx + 4], eax
mov eax, dword [edi + 8]
xor eax, dword [esi + 0x18]
mov dword [ebx + 8], eax
mov eax, dword [edi + 0xc]
add edi, 0x10
xor eax, dword [esi + 0x1c]
mov dword [ebx + 0xc], eax
add ebx, 0x10
sub dword [esp + 0x38], 1
jne 0x4ff9f0
mov ecx, dword [esp + 0x20]
push ecx
mov eax, ebx
sub eax, ecx
push eax
lea eax, [esi + 0x60]
push eax
lea eax, [esi + 0x40]
push eax
call fcn.00500410
add esp, 0x10
test ebp, ebp
je 0x4ffaea
push dword [esp + 0x18]
lea eax, [esi + 0x10]
push eax
push esi
call dword [esp + 0x28]
mov ecx, dword [esp + 0x20]
add esp, 0xc
inc ecx
mov eax, ecx
mov byte [esi + 0xf], cl
shr eax, 0x18
mov byte [esi + 0xc], al
mov eax, ecx
shr eax, 0x10
mov byte [esi + 0xd], al
mov eax, ecx
shr eax, 8
mov byte [esi + 0xe], al
mov eax, dword [esp + 0x24]
lea edx, [eax + ebx]
add eax, 0x10
add eax, esi
sub edi, ebx
lea ebx, [esi + 0x178]
mov dword [esp + 0x38], eax
mov esi, dword [esp + 0x10]
movzx eax, byte [eax]
lea edx, [edx + 1]
movzx ecx, byte [edi + edx - 1]
xor ecx, eax
mov eax, dword [esp + 0x38]
mov byte [edx - 1], cl
inc eax
mov byte [ebx + esi], cl
inc esi
mov dword [esp + 0x38], eax
sub ebp, 1
jne 0x4ffac0
mov dword [esp + 0x10], esi
mov esi, dword [esp + 0x2c]
mov eax, dword [esp + 0x10]
pop edi
pop ebx
mov dword [esi + 0x168], eax
xor eax, eax
pop esi
pop ebp
add esp, 0x18
ret
pop edi
pop ebx
mov dword [esi + 0x168], edx
xor eax, eax
pop esi
pop ebp
add esp, 0x18
ret
pop esi
or eax, 0xffffffff
pop ebp
add esp, 0x18
ret