-compiled binary no header or tables
used r2 to decompile and debug.```
[0x01002059]> pdf/ (fcn) entry0 68|   entry0 ();|           0x01002004      58             pop eax|           0x01002005      3c02           cmp al, 2                   ; 2            CHECKS IF THERE IS A ARGUMENT|       ,=< 0x01002007      740b           je 0x1002014|       |   ; CODE XREF from entry0 (0x100205d)|      .--> 0x01002009      b37f           mov bl, 0x7f                ; 127|      :|   0x0100200b      31c0           xor eax, eax                               0|      :|   0x0100200d      40             inc eax                                    1 == exit|      :|   0x0100200e      cd80           int 0x80                                   syscall|      :|   0x01002010      0200           add al, byte [eax]|      :|   0x01002012      0300           add eax, dword [eax]|      :|   ; CODE XREF from entry0 (0x1002007)|      :`-> 0x01002014      b420           mov ah, 0x20                ; 32         or space |      :,=< 0x01002016      eb16           jmp 0x100202e..|      :|   ; CODE XREF from entry0 (0x1002016)|      :`-> 0x0100202e      31c9           xor ecx, ecx                             ;|      :    0x01002030      bb00200001     mov ebx, map.home_m42d_Desktop_CTFs_akbar_Native_native.rwx ; 0x1002000|      :    0x01002035      5e             pop esi                                  ; (path) |      :    0x01002036      5e             pop esi                                  ; (arguments)|      :    0x01002037      eb01           jmp 0x100203a                            ; a NOP is a NOP|      :    0x0100203a      204b0a         and byte [ebx + 0xa], cl|      :    ; CODE XREF from entry0 (0x100205b)|      :.-> 0x0100203d      56             push esi                                 ;  arg pointer back on stack|      ::   0x0100203e      53             push ebx                                 ;  push pointer to beginning of file on stack|      ::   0x0100203f      01ce           add esi, ecx                             ; |      ::   0x01002041      01cb           add ebx, ecx                             ;  add counter2 to file pointer |      ::   0x01002043      31d2           xor edx, edx                             ;|      ::   0x01002045      30c0           xor al, al                               ;|      ::   ; CODE XREF from entry0 (0x100204f)|     .---> 0x01002047      0203           add al, byte [ebx]                  ; add byte that filepointer points to to al|     :::   0x01002049      00e3           add bl, ah                              ; move file pointer 32 bytes|     :::   0x0100204b      42             inc edx                                   ; counter2++|     :::   0x0100204c      83fa04         cmp edx, 4                            ;|     `===< 0x0100204f      75f6           jne 0x1002047                     ; so this loop happens 4 times |      ::   0x01002051      5b             pop ebx                                  ;|      ::   0x01002052      3206           xor al, byte [esi]                       ; xor the value of that calculated with the byte counter |      ::   0x01002054      08430a         or byte [ebx + 0xa], al                  ; OR het resultaat met wat filepointer + 10|      ::   0x01002057      5e             pop esi                                  ; reset file pointer to start of file|      ::   0x01002058      41             inc ecx                                  ; counter++|      ::   ;-- eip:|      ::   0x01002059 b    38e1           cmp cl, ah                               ; counter == 0x20|      :`=< 0x0100205b      75e0           jne 0x100203d                            ;\      `==< 0x0100205d      ebaa           jmp 0x1002009                            ;
```
python script to extract flag.
```f = open("native", "r")b = f.read()m = ""for p in range(0,32):    m += chr(int(hex(ord(b[p])+ord(b[p+0x20])+ord(b[p+0x40])+ord(b[p+0x60]))[-2:],16))print m```
FLAG{tiny_f1f_analysis_is__real}
