Function at 0x489a37
Capabilities:
Encode data using xor

Disassembly:
push ebx
mov ebx, dword [esp + 8]
push ebp
push esi
mov esi, dword [esp + 0x18]
mov edx, dword [ebx + 0xe8]
push edi
test edx, edx
je 0x489a58
mov eax, dword [ebx + 0x84]
sub eax, esi
dec eax
jmp 0x489a5a
mov eax, esi
mov ebp, dword [ebx + 0xcc]
mov edi, ebp
mov ecx, dword [ebx + 0xd4]
imul edi, eax
mov eax, ecx
imul eax, dword [esp + 0x18]
add edi, eax
add edi, dword [ebx + 0xc8]
test edx, edx
je 0x489a80
neg ebp
cmp dword [ebx + 0xe0], 0
jne 0x489e44
cmp dword [ebx + 0xe4], 0
jne 0x489e44
mov eax, dword [ebx + 0xd8]
test al, 2
je 0x489ad4
mov ecx, dword [esp + 0x20]
test ecx, ecx
je 0x489e68
mov al, byte [ebx + 0xf0]
xor byte [edi + 2], al
mov al, byte [ebx + 0xf4]
xor byte [edi + 1], al
mov al, byte [ebx + 0xf8]
xor byte [edi], al
add edi, ebp
dec ecx
jne 0x489ab0
jmp 0x489e68
test eax, 0x100
je 0x489b14
mov ecx, dword [esp + 0x20]
test ecx, ecx
je 0x489e68
mov al, byte [ebx + 0xf0]
mov byte [edi + 2], al
mov al, byte [ebx + 0xf4]
mov byte [edi + 1], al
mov al, byte [ebx + 0xf8]
mov byte [edi], al
mov al, byte [ebx + 0xfc]
mov byte [edi + 3], al
add edi, ebp
dec ecx
jne 0x489ae7
jmp 0x489e68
test al, 8
je 0x489b40
cmp ecx, 4
jne 0x489e68
mov ecx, dword [esp + 0x20]
test ecx, ecx
je 0x489e68
mov al, byte [ebx + 0xfc]
mov byte [edi + 3], al
add edi, ebp
dec ecx
jne 0x489b2d
jmp 0x489e68
test al, 0x10
je 0x489cef
cmp ecx, 4
jne 0x489c91
mov eax, dword [esp + 0x20]
jmp 0x489c80
movzx edx, byte [edi + 3]
mov ecx, dword [ebx + 0xfc]
mov dword [esp + 0x18], edx
test ecx, ecx
jne 0x489b72
movzx eax, byte [edi + 2]
jmp 0x489bb3
test edx, edx
jne 0x489b81
mov eax, dword [ebx + 0xf0]
cdq
idiv ecx
jmp 0x489baf
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi + 2]
imul ecx, dword [ebx + 0xf0], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov edx, dword [esp + 0x18]
mov byte [edi + 2], al
mov ecx, dword [ebx + 0xfc]
test ecx, ecx
jne 0x489bc6
movzx eax, byte [edi + 1]
jmp 0x489c03
test edx, edx
jne 0x489bd5
mov eax, dword [ebx + 0xf4]
cdq
idiv ecx
jmp 0x489c03
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi + 1]
imul ecx, dword [ebx + 0xf4], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov byte [edi + 1], al
mov ecx, dword [ebx + 0xfc]
test ecx, ecx
jne 0x489c15
movzx eax, byte [edi]
jmp 0x489c55
mov edx, dword [esp + 0x18]
test edx, edx
jne 0x489c28
mov eax, dword [ebx + 0xf8]
cdq
idiv ecx
jmp 0x489c55
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi]
imul ecx, dword [ebx + 0xf8], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov byte [edi], al
imul ecx, dword [ebx + 0xfc], 0xff
mov eax, dword [ebx + 0x100]
imul eax, dword [esp + 0x18]
add eax, ecx
mov ecx, 0xff
cdq
idiv ecx
mov byte [edi + 3], al
mov eax, dword [esp + 0x14]
dec eax
add edi, ebp
mov dword [esp + 0x14], eax
test eax, eax
jne 0x489b5a
jmp 0x489e68
mov ecx, dword [esp + 0x20]
test ecx, ecx
je 0x489e68
mov esi, 0xff
movzx eax, byte [edi + 2]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf0]
cdq
idiv esi
mov byte [edi + 2], al
movzx eax, byte [edi + 1]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf4]
cdq
idiv esi
mov byte [edi + 1], al
movzx eax, byte [edi]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf8]
cdq
idiv esi
mov byte [edi], al
add edi, ebp
dec ecx
jne 0x489ca2
jmp 0x489e68
test al, 0x20
je 0x489e1b
cmp ecx, 4
jne 0x489e1b
mov eax, dword [esp + 0x20]
jmp 0x489e0d
movzx edx, byte [edi + 3]
mov ecx, dword [ebx + 0xfc]
mov dword [esp + 0x18], edx
test ecx, ecx
jne 0x489d21
movzx eax, byte [edi + 2]
jmp 0x489d62
test edx, edx
jne 0x489d30
mov eax, dword [ebx + 0xf0]
cdq
idiv ecx
jmp 0x489d5e
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi + 2]
imul ecx, dword [ebx + 0xf0], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov edx, dword [esp + 0x18]
mov byte [edi + 2], al
mov ecx, dword [ebx + 0xfc]
test ecx, ecx
jne 0x489d75
movzx eax, byte [edi + 1]
jmp 0x489db2
test edx, edx
jne 0x489d84
mov eax, dword [ebx + 0xf4]
cdq
idiv ecx
jmp 0x489db2
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi + 1]
imul ecx, dword [ebx + 0xf4], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov byte [edi + 1], al
mov ecx, dword [ebx + 0xfc]
test ecx, ecx
jne 0x489dc4
movzx eax, byte [edi]
jmp 0x489e04
mov edx, dword [esp + 0x18]
test edx, edx
jne 0x489dd7
mov eax, dword [ebx + 0xf8]
cdq
idiv ecx
jmp 0x489e04
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi]
imul ecx, dword [ebx + 0xf8], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov byte [edi], al
mov eax, dword [esp + 0x14]
dec eax
add edi, ebp
mov dword [esp + 0x14], eax
test eax, eax
jne 0x489d09
jmp 0x489e68
mov ecx, dword [esp + 0x20]
test ecx, ecx
je 0x489e68
mov al, byte [ebx + 0xf0]
mov byte [edi + 2], al
mov al, byte [ebx + 0xf4]
mov byte [edi + 1], al
mov al, byte [ebx + 0xf8]
mov byte [edi], al
add edi, ebp
dec ecx
jne 0x489e23
jmp 0x489e68
mov eax, dword [esp + 0x20]
mov dword [esp + 0x14], eax
test eax, eax
je 0x489e68
push edi
push esi
push dword [esp + 0x20]
push ebx
call fcn.00489569
add esp, 0x10
add edi, ebp
inc esi
dec dword [esp + 0x14]
jne 0x489e50
pop edi
pop esi
pop ebp
pop ebx
ret