Function at 0x481580
Capabilities:
Encode data using xor
Generate random numbers using the delphi lcg

Disassembly:
sub esp, 0x10
push ebp
mov ebp, dword [esp + 0x18]
mov dword [esp + 4], 0
push esi
test ebp, ebp
je 0x4818d0
mov esi, dword [ebp + 0xe0]
test esi, esi
je 0x4818d0
cmp dword [esi], 0
jne 0x4815b7
pop esi
mov eax, 0xffffff9c
pop ebp
add esp, 0x10
ret
mov edx, dword [esp + 0x24]
push ebx
push edi
test edx, edx
je 0x4818c6
mov eax, dword [esp + 0x28]
xor ebx, ebx
mov ecx, edx
mov dword [esi + 0x10], eax
mov eax, dword [esi + 0x80]
mov dword [esi + 0x14], edx
mov dword [esp + 0x14], ebx
cmp ebx, dword [esi + 0x84]
jb 0x4815f8
ja 0x4815eb
cmp edx, eax
jbe 0x4815f8
cmp dword [esi + 0xc8], ebx
jne 0x4815f8
mov dword [esi + 0x14], eax
mov ecx, eax
mov ebx, dword [esi + 8]
xor eax, eax
mov edi, ebx
add edi, dword [esi + 0x78]
adc eax, dword [esi + 0x7c]
cmp dword [esp + 0x14], eax
jb 0x481622
ja 0x481611
cmp edx, edi
jbe 0x481622
cmp dword [esi + 0xc8], 0
je 0x481622
mov ecx, dword [esi + 0x78]
add ecx, ebx
mov dword [esi + 0x14], ecx
test ecx, ecx
je 0x4818a5
nop word [eax + eax]
mov edi, dword [esi + 8]
test edi, edi
jne 0x48177c
mov ecx, dword [esi + 0x7c]
mov eax, dword [esi + 0x78]
test ecx, ecx
jne 0x48164d
test eax, eax
je 0x48177c
mov edi, 0x4000
test ecx, ecx
ja 0x481666
jb 0x48165c
cmp eax, edi
jae 0x481666
mov edi, eax
test edi, edi
je 0x4818c6
mov ecx, dword [esi + 0xc0]
add ecx, dword [esi + 0x40]
mov eax, dword [esi + 0xc4]
adc eax, dword [esi + 0x44]
push 0
push eax
push ecx
push dword [esi + 0xb4]
lea eax, [esi + 0x88]
push eax
call fcn.00481900
add esp, 0x14
test eax, eax
jne 0x4818b1
mov eax, dword [esi + 0x8c]
push edi
push dword [esi]
push dword [esi + 0xb4]
push dword [esi + 0xa4]
call eax
add esp, 0x10
cmp eax, edi
jne 0x4818b1
cmp dword [ebp + 0xe4], 0
je 0x481766
xor ecx, ecx
mov dword [esp + 0x14], ecx
test edi, edi
je 0x481766
nop word [eax + eax]
mov edx, dword [ebp + 0xf4]
add ecx, dword [esi]
and edx, 0xfffd
or edx, 2
mov eax, edx
xor eax, 1
imul eax, edx
shr eax, 8
xor byte [ecx], al
mov bl, byte [ecx]
mov ecx, dword [ebp + 0xec]
mov edx, dword [ebp + 0xf8]
movsx eax, bl
xor eax, ecx
shr ecx, 8
movzx eax, al
xor ecx, dword [edx + eax*4]
movzx eax, cl
add eax, dword [ebp + 0xf0]
imul eax, eax, 0x8088405
mov dword [ebp + 0xec], ecx
mov ecx, dword [ebp + 0xf4]
inc eax
mov dword [ebp + 0xf0], eax
shr eax, 0x18
xor eax, ecx
shr ecx, 8
movzx eax, al
xor ecx, dword [edx + eax*4]
mov dword [ebp + 0xf4], ecx
mov ecx, dword [esp + 0x14]
mov eax, dword [esi]
mov byte [ecx + eax], bl
inc ecx
mov dword [esp + 0x14], ecx
cmp ecx, edi
jb 0x4816e0
add dword [esi + 0x40], edi
mov eax, dword [esi]
adc dword [esi + 0x44], 0
sub dword [esi + 0x78], edi
mov dword [esi + 4], eax
sbb dword [esi + 0x7c], 0
mov dword [esi + 8], edi
mov eax, dword [esi + 0xb8]
test eax, eax
je 0x481838
cmp dword [esi + 0xc8], 0
jne 0x481838
cmp eax, 0xc
je 0x48189b
mov eax, dword [esi + 0x10]
mov edi, dword [esi + 0x18]
mov dword [esp + 0x18], eax
lea eax, [esi + 4]
push 2
push eax
mov dword [esp + 0x1c], edi
call fcn.00481ae0
mov ebx, eax
add esp, 8
test ebx, ebx
js 0x4817ce
cmp dword [esi + 0x1c], 0
mov eax, 0xfffffffd
cmovne ebx, eax
mov ebp, dword [esi + 0x18]
xor eax, eax
cmp ebp, edi
jae 0x4817dd
add ebp, 0
adc eax, 1
mov edi, ebp
sub edi, dword [esp + 0x14]
push edi
push dword [esp + 0x1c]
sbb eax, 0
add dword [esi + 0x68], edi
push dword [esi + 0x70]
adc dword [esi + 0x6c], eax
mov dword [esp + 0x28], eax
call fcn.00483780
add esp, 0xc
mov dword [esi + 0x70], eax
sub dword [esi + 0x80], edi
mov eax, dword [esp + 0x1c]
sbb dword [esi + 0x84], eax
sub ebp, dword [esp + 0x14]
mov eax, dword [esp + 0x10]
add eax, ebp
mov dword [esp + 0x10], eax
cmp ebx, 1
je 0x4818a9
test ebx, ebx
jne 0x4818bc
mov ebp, dword [esp + 0x24]
jmp 0x48189b
test edi, edi
jne 0x481844
mov eax, dword [esi + 0x78]
or eax, dword [esi + 0x7c]
je 0x4818a5
cmp dword [esi + 0x14], edi
cmovb edi, dword [esi + 0x14]
xor edx, edx
test edi, edi
je 0x481862
mov eax, dword [esi + 4]
mov ecx, dword [esi + 0x10]
mov al, byte [edx + eax]
mov byte [edx + ecx], al
inc edx
cmp edx, edi
jb 0x481851
add dword [esi + 0x68], edi
push edi
push dword [esi + 0x10]
adc dword [esi + 0x6c], 0
push dword [esi + 0x70]
call fcn.00483780
add esp, 0xc
mov dword [esi + 0x70], eax
sub dword [esi + 0x80], edi
sbb dword [esi + 0x84], 0
sub dword [esi + 8], edi
sub dword [esi + 0x14], edi
add dword [esi + 0x10], edi
add dword [esi + 4], edi
add dword [esi + 0x18], edi
add dword [esp + 0x10], edi
cmp dword [esi + 0x14], 0
ja 0x481630
mov eax, dword [esp + 0x10]
pop edi
pop ebx
pop esi
pop ebp
add esp, 0x10
ret
pop edi
pop ebx
pop esi
or eax, 0xffffffff
pop ebp
add esp, 0x10
ret
pop edi
mov eax, ebx
pop ebx
pop esi
pop ebp
add esp, 0x10
ret
pop edi
pop ebx
pop esi
xor eax, eax
pop ebp
add esp, 0x10
ret
pop esi
mov eax, 0xffffff9a
pop ebp
add esp, 0x10
ret