Function at 0x42fb00
Capabilities:
Get file size
Hash data with crc32
Read file on windows

Disassembly:
push ebp
mov ebp, esp
push 0xffffffffffffffff
push 0x478f50
mov eax, dword fs:[0]
push eax
mov dword fs:[0], esp
sub esp, 0x60
mov eax, dword [0x49ae1c]
push ebx
mov ebx, ecx
push esi
mov dword [ebp - 0x14], eax
mov eax, dword [ebx + 0xc]
xor esi, esi
cmp eax, esi
push edi
mov dword [ebp - 0x10], esp
mov dword [ebp - 0x38], ebx
mov dword [ebp - 4], esi
jne 0x42fb41
xor edi, edi
mov dword [ebp - 0x44], edi
jmp 0x42fb5c
mov ecx, dword [ebx + 0x10]
sub ecx, eax
mov eax, 0x38e38e39
imul ecx
sar edx, 4
mov eax, edx
shr eax, 0x1f
add eax, edx
mov dword [ebp - 0x44], eax
mov edi, eax
push esi
push 0x47b95b
lea ecx, [ebp - 0x30]
mov dword [ebp - 0x18], 0xf
mov dword [ebp - 0x1c], esi
mov byte [ebp - 0x2c], 0
call fcn.00403ed0
mov ecx, dword [ebx + 4]
lea eax, [ebp - 0x50]
push eax
push ecx
mov byte [ebp - 4], 1
call dword [sym.imp.KERNEL32.dll_GetFileSize]
cmp eax, 0xffffffff
mov dword [ebp - 0x54], eax
jne 0x42fba2
call fcn.00401430
cmp eax, esi
jl 0x42fcb8
mov eax, dword [ebp - 0x54]
push 0x100000
mov dword [ebp - 0x6c], eax
mov dword [ebp - 0x4c], 0x100000
call fcn.00466afa
add esp, 4
mov dword [ebp - 0x34], eax
mov byte [ebp - 4], 2
mov dword [ebp - 0x40], esi
cmp esi, edi
jge 0x42fdb0
mov ecx, dword [ebp + 8]
test ecx, ecx
je 0x42fbd8
mov edx, dword [ecx]
push edi
push esi
call dword [edx]
mov eax, dword [ebx + 0xc]
lea ecx, [esi + esi*8]
lea ebx, [eax + ecx*8]
push 0
mov dword [ebp - 0x48], 0
mov eax, dword [ebx + 0x24]
mov edi, dword [ebx + 0x2c]
lea edx, [ebp - 0x60]
push edx
push eax
mov dword [ebp - 0x64], eax
mov eax, dword [ebp - 0x38]
mov ecx, dword [eax + 4]
push ecx
mov dword [ebp - 0x58], ebx
or esi, 0xffffffff
mov dword [ebp - 0x3c], edi
mov dword [ebp - 0x60], 0
call dword [sym.imp.KERNEL32.dll_SetFilePointer]
cmp eax, 0xffffffff
jne 0x42fc20
call fcn.00401430
nop
test edi, edi
je 0x42fcbd
cmp edi, dword [ebp - 0x4c]
mov dword [ebp - 0x5c], edi
lea eax, [ebp - 0x5c]
jb 0x42fc36
lea eax, [ebp - 0x4c]
mov eax, dword [eax]
mov ecx, dword [ebp - 0x38]
push 0
lea edx, [ebp - 0x48]
push edx
mov edx, dword [ecx + 4]
push eax
mov eax, dword [ebp - 0x34]
push eax
push edx
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
jne 0x42fc5d
call fcn.00401430
test eax, eax
jl 0x42fcb8
mov edi, dword [ebp - 0x48]
test edi, edi
jne 0x42fc7b
mov eax, dword [ebp - 0x34]
push eax
call fcn.00466af5
mov eax, dword [ebp - 0x18]
add esp, 4
cmp eax, 0x10
jmp 0x42fd73
mov ecx, dword [ebp - 0x34]
mov edx, edi
mov eax, esi
mov esi, edx
dec edx
test esi, esi
je 0x42fca7
xor ebx, ebx
mov bl, byte [ecx]
xor ebx, eax
and ebx, 0xff
mov esi, dword [ebx*4 + 0x498b40]
mov ebx, dword [ebp - 0x58]
shr eax, 8
xor eax, esi
inc ecx
jmp 0x42fc82
mov esi, eax
mov eax, dword [ebp - 0x3c]
sub eax, edi
mov dword [ebp - 0x3c], eax
mov edi, eax
jmp 0x42fc20
call fcn.0042f780
mov edx, dword [ebp - 0x38]
cmp dword [ebx], edx
not esi
jne 0x42fd8f
cmp esi, dword [ebx + 0x34]
jne 0x42fd8f
mov eax, dword [ebx + 0x1c]
mov ecx, dword [ebx + 0x18]
lea esi, [ebx + 4]
mov edi, 0x10
cmp eax, edi
jb 0x42fcea
mov eax, dword [esi + 4]
jmp 0x42fced
lea eax, [esi + 4]
push ecx
push eax
mov eax, dword [ebp - 0x1c]
push eax
push 0
lea ecx, [ebp - 0x30]
call fcn.0042d270
test eax, eax
jl 0x42fd3d
mov ecx, dword [ebp - 0x34]
push ecx
call fcn.00466af5
mov eax, dword [ebp - 0x18]
add esp, 4
cmp eax, edi
jb 0x42fd20
mov edx, dword [ebp - 0x2c]
push edx
call fcn.00466af5
add esp, 4
xor al, al
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
mov ecx, dword [ebp - 0x14]
call fcn.00447453
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret 4
push 0xffffffffffffffff
push 0
push esi
lea ecx, [ebp - 0x30]
call fcn.00403de0
mov eax, dword [ebx + 0x2c]
mov esi, dword [ebx + 0x24]
mov edx, dword [ebp - 0x50]
xor ecx, ecx
add eax, esi
cmp edx, ecx
ja 0x42fd7b
jb 0x42fd62
cmp dword [ebp - 0x6c], eax
jae 0x42fd7b
mov eax, dword [ebp - 0x34]
push eax
call fcn.00466af5
mov eax, dword [ebp - 0x18]
add esp, 4
cmp eax, edi
jb 0x42fd20
mov ecx, dword [ebp - 0x2c]
push ecx
jmp 0x42fd18
mov eax, dword [ebp - 0x40]
mov ebx, dword [ebp - 0x38]
mov edi, dword [ebp - 0x44]
inc eax
mov dword [ebp - 0x40], eax
mov esi, eax
jmp 0x42fbc3
mov edx, dword [ebp - 0x34]
push edx
call fcn.00466af5
mov eax, dword [ebp - 0x18]
add esp, 4
cmp eax, 0x10
jb 0x42fd20
mov eax, dword [ebp - 0x2c]
push eax
jmp 0x42fd18
mov ecx, dword [ebp - 0x34]
push ecx
call fcn.00466af5
mov eax, dword [ebp - 0x18]
add esp, 4
cmp eax, 0x10
jb 0x42fdd0
mov edx, dword [ebp - 0x2c]
push edx
call fcn.00466af5
add esp, 4
mov al, 1
jmp 0x42fd22