Function at 0x43ff50
Capabilities:
Get file size
Read file on windows

Disassembly:
push ebp
mov ebp, esp
and esp, 0xfffffff8
sub esp, 0x2c
push ebx
push esi
mov esi, dword [ebp + 8]
mov eax, dword [esi + 0xc]
mov ecx, dword [esi + 8]
push edi
xor edi, edi
lea edx, [eax + 0x10]
mov dword [esp + 0x1c], edi
cmp edx, ecx
jae 0x43ff7a
cmp edx, 0x494808
jne 0x43ff83
or ebx, 0xffffffff
mov dword [esp + 0xc], ebx
jmp 0x43ff8c
mov edx, dword [edx + 8]
mov dword [esp + 0xc], edx
mov ebx, edx
add eax, 0x20
cmp eax, ecx
jae 0x44003c
cmp eax, 0x494808
je 0x44002c
mov edx, dword [eax + 8]
cmp edx, 3
jne 0x44000a
cmp eax, ecx
jb 0x43ffb3
mov eax, 0x494808
mov ecx, dword [eax + 8]
cmp ecx, 3
je 0x43ffe6
cmp ecx, 4
jne 0x43ffff
mov eax, dword [eax]
add eax, 0x10
lea edi, [esp + 0x10]
call fcn.00444e40
test eax, eax
je 0x43ffff
fld qword [esp + 0x10]
mov dword [esp + 0x30], 3
fstp qword [esp + 0x28]
lea eax, [esp + 0x28]
fld qword [eax]
fadd qword [0x498c18]
fstp qword [esp + 0x20]
mov eax, dword [esp + 0x20]
movzx eax, ax
mov dword [esp + 0x10], eax
jmp 0x440072
xor eax, eax
movzx eax, ax
mov dword [esp + 0x10], eax
jmp 0x440072
cmp edx, 2
jne 0x44002c
cmp eax, ecx
jb 0x440018
mov eax, 0x494808
cmp dword [eax + 8], 2
jne 0x440026
mov ecx, dword [eax]
mov dword [esp + 0x10], ecx
jmp 0x440072
mov dword [esp + 0x10], edi
jmp 0x440072
cmp eax, ecx
jae 0x44003c
cmp eax, 0x494808
je 0x44003c
cmp dword [eax + 8], edi
jg 0x440046
mov dword [esp + 0x10], 0x496f60
jmp 0x440072
push 3
xor ebx, ebx
mov eax, esi
call fcn.0041e970
mov ebx, eax
add esp, 4
test ebx, ebx
jne 0x44006a
push str.string
lea edi, [eax + 3]
call fcn.004214f0
add esp, 4
mov dword [esp + 0x10], ebx
mov ebx, dword [esp + 0xc]
cmp ebx, 4
jne 0x440261
mov eax, dword [esi + 0xc]
add eax, 0x10
cmp eax, dword [esi + 8]
jb 0x44008b
mov eax, 0x494808
mov ecx, dword [eax + 8]
cmp ecx, 4
je 0x4400de
cmp ecx, 7
jne 0x4400a5
mov ecx, dword [eax]
cmp dword [ecx + 8], 0
jne 0x4400a5
lea edi, [ecx + 0x18]
jmp 0x4400e3
mov edi, dword [ebp + 8]
mov esi, eax
call fcn.004354e0
test eax, eax
jne 0x4400ba
mov esi, dword [ebp + 8]
xor edi, edi
jmp 0x4400e3
mov eax, dword [edi + 0x10]
mov edx, dword [eax + 0x44]
cmp edx, dword [eax + 0x40]
jb 0x4400cc
mov eax, edi
call fcn.004352b0
mov eax, dword [edi + 0xc]
add eax, 0x10
mov esi, edi
cmp eax, dword [edi + 8]
jb 0x4400de
mov eax, 0x494808
mov edi, dword [eax]
add edi, 0x10
mov eax, dword [esi + 8]
mov ecx, dword [esi + 0xc]
mov edx, eax
sub edx, ecx
and edx, 0xfffffff0
cmp edx, 0x20
jne 0x440252
add ecx, 0x10
cmp ecx, eax
jb 0x440105
mov ecx, 0x494808
mov edx, dword [ecx]
mov dword [eax], edx
mov edx, dword [ecx + 4]
mov dword [eax + 4], edx
mov ecx, dword [ecx + 8]
mov dword [eax + 8], ecx
add dword [esi + 8], 0x10
lea esp, [esp]
or ebx, 0xffffffff
mov eax, esi
call fcn.00420ae0
push 0
push 0x8000080
push 3
push 0
push 3
push SysReAllocString
push eax
call dword [sym.imp.KERNEL32.dll_CreateFileW]
add dword [esi + 8], 0xfffffff0
mov ebx, eax
test ebx, ebx
je 0x440152
cmp ebx, 0xffffffff
jne 0x440172
cmp byte [edi], 0x7e
jne 0x440252
cmp byte [edi + 1], 0
je 0x440252
inc edi
mov ebx, edi
call fcn.0041eba0
mov esi, dword [ebp + 8]
jmp 0x440120
push 0
push ebx
call dword [sym.imp.KERNEL32.dll_GetFileSize]
cmp dword [ebp + 0xc], 0
mov dword [esp + 0x1c], eax
mov dword [esp + 0xc], 0
jne 0x44019c
mov edx, eax
push edx
call fcn.0046cb2d
add esp, 4
mov edi, eax
jmp 0x4401c9
mov edi, dword [esp + 0x1c]
call fcn.0041f7e0
test eax, eax
jne 0x4401b0
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
mov eax, dword [ebp + 8]
mov eax, dword [eax + 8]
cmp dword [eax - 8], 7
mov esi, dword [ebp + 8]
jne 0x4401c7
mov edi, dword [eax - 0x10]
add edi, 0x18
jmp 0x4401c9
xor edi, edi
mov edx, dword [esp + 0x1c]
push 0
lea ecx, [esp + 0x10]
push ecx
push edx
push edi
push ebx
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
je 0x440229
cmp dword [ebp + 0xc], 0
jne 0x44021f
mov eax, dword [esp + 0xc]
cmp eax, 2
jb 0x440215
test al, 1
jne 0x440215
cmp byte [edi], 0xff
jne 0x440215
cmp byte [edi + 1], 0xfe
jne 0x440215
shr eax, 1
push eax
push edi
call fcn.0041eaf0
add esp, 8
mov dword [esp + 0xc], 1
jmp 0x440231
push eax
push edi
call fcn.0041eab0
add esp, 8
mov dword [esp + 0xc], 1
jmp 0x440231
mov dword [esp + 0xc], 0
cmp dword [ebp + 0xc], 0
jne 0x440240
push edi
call fcn.0046caf3
add esp, 4
push ebx
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov eax, dword [esp + 0xc]
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
mov edx, edi
mov ecx, esi
call fcn.00422630
mov dword [esp + 0x1c], eax
jmp 0x4402bc
cmp ebx, 3
jne 0x44027a
push 2
push esi
call fcn.0041e600
movzx eax, ax
add esp, 8
mov dword [esp + 0x1c], eax
jmp 0x4402bc
cmp ebx, 2
jne 0x4402a7
mov eax, dword [esi + 0xc]
add eax, 0x10
cmp eax, dword [esi + 8]
jb 0x44028f
mov eax, 0x494808
cmp dword [eax + 8], 2
jne 0x44029d
mov ecx, dword [eax]
mov dword [esp + 0x1c], ecx
jmp 0x4402bc
mov dword [esp + 0x1c], 0
jmp 0x4402bc
push str.string
mov edi, 2
call fcn.004214f0
mov esi, dword [ebp + 8]
add esp, 4
mov eax, dword [esi + 0xc]
mov ecx, dword [esi + 8]
add eax, 0x30
cmp eax, ecx
jae 0x4402d6
cmp eax, 0x494808
je 0x4402d6
cmp dword [eax + 8], 0
jg 0x4402da
xor eax, eax
jmp 0x440308
cmp eax, ecx
jb 0x4402e3
mov eax, 0x494808
cmp dword [eax + 8], 2
jne 0x44032e
mov ebx, dword [eax]
test ebx, ebx
jne 0x440306
mov edx, dword [str.pointer]
push edx
mov edi, 4
call fcn.004214f0
mov esi, dword [ebp + 8]
add esp, 4
mov eax, ebx
mov ecx, dword [ebp + 0xc]
mov edx, dword [esp + 0x10]
push ecx
mov ecx, dword [esp + 0x20]
push edx
push ecx
push esi
call fcn.00420730
add esp, 0x10
xor edx, edx
cmp edx, eax
pop edi
sbb eax, eax
pop esi
neg eax
pop ebx
mov esp, ebp
pop ebp
ret
xor ebx, ebx
jmp 0x4402ef