Function at 0x10008020
Capabilities:
Get file size
Read file on windows

Disassembly:
push ebp
mov ebp, esp
and esp, 0xfffffff8
sub esp, 0x24
mov eax, dword [0x10064040]
xor eax, esp
mov dword [esp + 0x20], eax
push ebx
push esi
mov esi, ecx
mov ebx, edx
mov dword [esp + 0x10], esi
push edi
mov edi, dword [ebp + 8]
mov dword [esp + 0x18], edi
test esi, esi
jne 0x10008054
push str.ISteamUser::GetEncryptedAppTicket_____Ticket_Pointer_is_nullptr__r_n
jmp 0x1000826a
test ebx, ebx
jne 0x10008065
push str.ISteamUser::GetEncryptedAppTicket_____cbMaxTicket_is_0__r_n
nop dword [eax]
jmp 0x1000826a
test edi, edi
jne 0x10008073
push str.ISteamUser::GetEncryptedAppTicket_____Ticket_size_Pointer_is_nullptr__r_n
jmp 0x1000826a
push dword ds:[edi]
push ebx
push str.ISteamUser::GetEncryptedAppTicket______d______d_r_n
call fcn.10002320
add esp, 0xc
cmp byte [0x100674b7], 1
jne 0x100080bb
cmp dword [0x10073b94], 0
je 0x100080bb
push edi
push ebx
push esi
call dword [0x10068570]
add esp, 0xc
pop edi
pop esi
pop ebx
mov ecx, dword [esp + 0x20]
xor ecx, esp
call fcn.1002d2b1
mov esp, ebp
pop ebp
ret
push 0
push 0x80
push 3
push 0
push 1
push 0x80000000
push 0x10069938
call dword [sym.imp.KERNEL32.dll_CreateFileW]
mov edi, eax
cmp edi, 0xffffffff
je 0x10008265
push str.ISteamUser::GetEncryptedAppTicket_____Ticket_file_successfully_opened__r_n
call fcn.10002320
add esp, 4
mov dword [esp + 0x20], 0
lea eax, [esp + 0x20]
mov dword [esp + 0x24], 0
push eax
push edi
call dword [sym.imp.KERNEL32.dll_GetFileSizeEx]
test eax, eax
jne 0x10008143
push str.ISteamUser::GetEncryptedAppTicket_____Unable_to_get_ticket_size__r_n
nop dword [eax + eax]
call fcn.10002320
add esp, 4
push edi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
xor al, al
pop edi
pop esi
pop ebx
mov ecx, dword [esp + 0x20]
xor ecx, esp
call fcn.1002d2b1
mov esp, ebp
pop ebp
ret
mov esi, dword [esp + 0x20]
push esi
call fcn.1002d821
push esi
mov esi, eax
push 0
push esi
call fcn.1002eee0
add esp, 0x10
mov dword [esp + 0x1c], 0
lea eax, [esp + 0x1c]
push 0
push eax
push dword [esp + 0x28]
push esi
push edi
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
jne 0x1000819a
push str.ISteamUser::GetEncryptedAppTicket_____Unable_to_read_ticket_file__r_n
nop
call fcn.10002320
add esp, 4
push edi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push esi
call fcn.1002d2c4
jmp 0x1000826f
mov eax, dword ds:[esp + 0x1c]
cmp ebx, eax
jae 0x100081ab
push str.ISteamUser::GetEncryptedAppTicket_____Ticket_buffer_is_too_small__r_n
jmp 0x1000817f
push eax
push str.ISteamUser::GetEncryptedAppTicket_____Ticket_file_size______d_r_n
call fcn.10002320
push str.ISteamUser::GetEncryptedAppTicket_____Copying_ticket_to_memory..._r_n
nop dword [eax + eax]
call fcn.10002320
mov edx, dword [esp + 0x20]
add esp, 0xc
mov ecx, ebx
mov eax, edx
mov byte [eax], 0
lea eax, [eax + 1]
sub ecx, 1
jne 0x100081d0
mov eax, dword ds:[esp + 0x1c]
test eax, eax
je 0x100081f3
cmp ebx, eax
jb 0x1000822e
push eax
push esi
push edx
call fcn.1002f0a0
add esp, 0xc
push str.ISteamUser::GetEncryptedAppTicket_____Ticket_successfully_copied_to_memory__r_n
call fcn.10002320
add esp, 4
push edi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push esi
call fcn.1002d2c4
mov ecx, dword [esp + 0x1c]
add esp, 4
mov eax, dword [esp + 0x1c]
mov dword [ecx], eax
mov al, 1
pop edi
pop esi
pop ebx
mov ecx, dword [esp + 0x20]
xor ecx, esp
call fcn.1002d2b1
mov esp, ebp
pop ebp
ret
push ebx
push 0
push edx
call fcn.1002eee0
add esp, 0xc
cmp ebx, dword [esp + 0x1c]
jae 0x10008256
call fcn.10037a40
mov dword [eax], 0x22
call fcn.10037306
push str.ISteamUser::GetEncryptedAppTicket_____Failed_to_copy_ticket_to_memory__r_n
nop dword [eax + eax]
jmp 0x1000817f
push str.ISteamUser::GetEncryptedAppTicket_____Unable_to_open_local_ticket_file__r_n
call fcn.10002320
mov ecx, dword ds:[esp + 0x30]
add esp, 4
xor al, al
pop edi
pop esi
pop ebx
xor ecx, esp
call fcn.1002d2b1
mov esp, ebp
pop ebp
ret