Line data    Source code

       1             : #if !FD_HAS_HOSTED
       2             : #error "This target requires FD_HAS_HOSTED"
       3             : #endif
       4             : 
       5             : #include <assert.h>
       6             : #include <stdio.h>
       7             : #include <stdlib.h>
       8             : 
       9             : #include "../../util/fd_util.h"
      10             : #include "../../util/sanitize/fd_fuzz.h"
      11             : #include "fd_hex.h"
      12             : 
      13             : int
      14             : LLVMFuzzerInitialize( int  *   argc,
      15          18 :                       char *** argv ) {
      16             :   /* Set up shell without signal handlers */
      17          18 :   putenv( "FD_LOG_BACKTRACE=0" );
      18          18 :   fd_boot( argc, argv );
      19          18 :   atexit( fd_halt );
      20          18 :   fd_log_level_core_set(3); /* crash on warning log */
      21          18 :   return 0;
      22          18 : }
      23             : 
      24             : /* checks if given encoding of sz chars is valid, sz must be even
      25             :    returns sz on success, index of first invalid char on failure */
      26             : static inline ulong
      27           0 : check_hex_encoding( char const * enc, ulong sz  ) {
      28           0 :   ulong i;
      29           0 :   for( i=0; i<sz; i++ ) {
      30           0 :     char c = enc[i];
      31           0 :     if( c>='0' && c<='9' ) continue;
      32           0 :     if( c>='a' && c<='f' ) continue;
      33           0 :     if( c>='A' && c<='F' ) continue;
      34           0 :     return i;
      35           0 :   }
      36           0 :   return sz;
      37           0 : }
      38             : 
      39             : #define MAX_DATA_SZ 4096UL
      40             : #define MAX_DECODED_SZ ( MAX_DATA_SZ / 2UL )
      41             : 
      42             : int
      43             : LLVMFuzzerTestOneInput( uchar const * data,
      44             :                         ulong         size ) {
      45             :   if( FD_UNLIKELY( size > MAX_DATA_SZ ) ) return -1;
      46             :   char const * encoded = ( char  const * ) data;
      47             : 
      48             :   size = size & ~1UL; /* ignore last char of encoding if size is odd */
      49             : 
      50             :   uchar decoded[ MAX_DECODED_SZ ];
      51             :   ulong decoded_sz = fd_hex_decode( decoded, encoded, size/2UL );
      52             : 
      53             :   assert( decoded_sz == ( check_hex_encoding( encoded, size )/2UL ) );
      54             : 
      55             :   FD_FUZZ_MUST_BE_COVERED;
      56             :   return 0;
      57             : }