Function at 0x490640
Capabilities:
Encode data using xor

Disassembly:
mov eax, 0x34
call fcn.00419ad0
mov eax, dword [0x502404]
push ebx
push ebp
push esi
test eax, eax
push edi
je 0x490709
push 0xdc
push 0x4d8d28
push 0x13
push 5
call fcn.004815c0
call fcn.00481590
mov ebp, dword [0x502408]
xor ecx, ecx
cmp ebp, eax
push 0xde
sete cl
push 0x4d8d28
mov esi, ecx
push 0x13
push 6
mov dword [esp + 0x30], esi
call fcn.004815c0
add esp, 0x20
test esi, esi
jne 0x4906b6
push 0xe3
push 0x4d8d28
push 0x12
push 9
call fcn.004815c0
add esp, 0x10
mov eax, dword [0x5023ec]
mov edx, dword [0x5023f0]
mov ebx, dword [0x5023f4]
mov ecx, 5
mov esi, 0x5023d4
lea edi, [esp + 0x30]
rep movsd dword es:[edi], dword [esi]
mov esi, dword [esp + 0x4c]
mov ebp, eax
add eax, esi
mov dword [esp + 0x18], edx
cmp eax, 0x3ff
mov dword [esp + 0x1c], ebx
mov dword [0x5023ec], eax
jl 0x490713
cdq
mov ecx, 0x3ff
idiv ecx
mov dword [0x5023e8], ecx
mov dword [0x5023ec], edx
jmp 0x49072a
mov dword [esp + 0x10], 0
jmp 0x4906a0
mov ecx, dword [0x5023e8]
cmp ecx, 0x3ff
jge 0x49072a
cmp eax, ecx
jle 0x49072a
mov dword [0x5023e8], eax
mov eax, esi
mov ecx, 0x14
cdq
idiv ecx
xor ecx, ecx
mov eax, 0x66666667
mov edi, dword [esp + 0x10]
test edx, edx
setg cl
imul esi
sar edx, 3
mov eax, edx
shr eax, 0x1f
add edx, eax
add edx, ebx
add edx, ecx
test edi, edi
mov dword [0x5023f4], edx
jne 0x490774
push 0x103
push 0x4d8d28
push 0x12
push 0xa
call fcn.004815c0
add esp, 0x10
lea ecx, [esp + 0x20]
push ecx
call fcn.0047f870
add esp, 4
test esi, esi
jle 0x4908a9
mov ecx, esi
add esi, 0x13
mov eax, 0xcccccccd
mov ebx, dword [esp + 0x48]
mul esi
shr edx, 4
mov dword [esp + 0x4c], ecx
mov dword [esp + 0x14], edx
jmp 0x4907aa
mov ecx, dword [esp + 0x4c]
cmp ecx, 0x14
mov esi, ecx
jle 0x4907b6
mov esi, 0x14
push 0
call fcn.00480050
lea edx, [esp + 0x24]
push eax
push edx
call fcn.0047f8f0
lea eax, [esp + 0x3c]
push 0x14
lea ecx, [esp + 0x30]
push eax
push ecx
call fcn.0047fa60
lea edi, [esi + ebp - 0x3ff]
add esp, 0x18
test edi, edi
jle 0x490812
mov edx, esi
lea eax, [ebp + 0x501fc0]
sub edx, edi
lea ecx, [esp + 0x20]
push edx
push eax
push ecx
call fcn.0047fa60
push edi
lea edx, [esp + 0x30]
push 0x501fc0
push edx
call fcn.0047fa60
add esp, 0x18
jmp 0x490827
lea eax, [ebp + 0x501fc0]
push esi
lea ecx, [esp + 0x24]
push eax
push ecx
call fcn.0047fa60
add esp, 0xc
push esi
lea edx, [esp + 0x24]
push ebx
push edx
call fcn.0047fa60
lea eax, [esp + 0x24]
push 8
lea ecx, [esp + 0x30]
push eax
push ecx
call fcn.0047fa60
lea edx, [esp + 0x48]
push 0
lea eax, [esp + 0x3c]
push edx
push eax
call fcn.0047fb60
mov edi, dword [esp + 0x40]
add esp, 0x24
inc edi
add ebx, esi
xor eax, eax
mov dword [esp + 0x1c], edi
test esi, esi
jle 0x49088b
mov cl, byte [esp + eax + 0x30]
mov dl, byte [ebp + 0x501fc0]
xor dl, cl
mov byte [ebp + 0x501fc0], dl
inc ebp
cmp ebp, 0x3ff
jl 0x490886
xor ebp, ebp
inc eax
cmp eax, esi
jl 0x490869
mov ecx, dword [esp + 0x4c]
mov eax, dword [esp + 0x14]
sub ecx, 0x14
dec eax
mov dword [esp + 0x4c], ecx
mov dword [esp + 0x14], eax
jne 0x4907a6
mov edi, dword [esp + 0x10]
lea edx, [esp + 0x20]
push edx
call fcn.0047ff80
add esp, 4
test edi, edi
jne 0x4908d0
push 0x12e
push 0x4d8d28
push 0x12
push 9
call fcn.004815c0
add esp, 0x10
xor eax, eax
mov cl, byte [esp + eax + 0x30]
mov bl, byte [eax + 0x5023d4]
xor bl, cl
mov byte [eax + 0x5023d4], bl
inc eax
cmp eax, 0x14
jl 0x4908d2
fld qword [0x5023f8]
fcomp qword [0x4d8d20]
fnstsw ax
test ah, 1
je 0x49090d
fld qword [0x5023f8]
fadd qword [esp + 0x50]
fstp qword [0x5023f8]
test edi, edi
pop edi
pop esi
pop ebp
pop ebx
jne 0x49092b
push 0x139
push 0x4d8d28
push 0x12
push 0xa
call fcn.004815c0
add esp, 0x10
add esp, 0x34
ret