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comparison dbutil.c @ 1375:d8215479a58a fuzz

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fuzzing has a constant time
author Matt Johnston <matt@ucc.asn.au>
date Thu, 25 May 2017 22:20:10 +0800
parents ddfcadca3c4c
children f03cfe9c76ac
comparison
equal deleted inserted replaced
1374:4b1a807a3188 1375:d8215479a58a
623 return -1; 623 return -1;
624 } 624 }
625 #endif 625 #endif
626 626
627 time_t monotonic_now() { 627 time_t monotonic_now() {
628 #ifdef DROPBEAR_FUZZ
629 if (fuzz.fuzzing) {
630 /* time stands still when fuzzing */
631 return 5;
632 }
633 #endif
628 #if defined(__linux__) && defined(SYS_clock_gettime) 634 #if defined(__linux__) && defined(SYS_clock_gettime)
635 {
629 static clockid_t clock_source = -2; 636 static clockid_t clock_source = -2;
630 637
631 if (clock_source == -2) { 638 if (clock_source == -2) {
632 /* First run, find out which one works. 639 /* First run, find out which one works.
633 -1 will fall back to time() */ 640 -1 will fall back to time() */
640 /* Intermittent clock failures should not happen */ 647 /* Intermittent clock failures should not happen */
641 dropbear_exit("Clock broke"); 648 dropbear_exit("Clock broke");
642 } 649 }
643 return ts.tv_sec; 650 return ts.tv_sec;
644 } 651 }
652 }
645 #endif /* linux clock_gettime */ 653 #endif /* linux clock_gettime */
646 654
647 #if defined(HAVE_MACH_ABSOLUTE_TIME) 655 #if defined(HAVE_MACH_ABSOLUTE_TIME)
656 {
648 /* OS X, see https://developer.apple.com/library/mac/qa/qa1398/_index.html */ 657 /* OS X, see https://developer.apple.com/library/mac/qa/qa1398/_index.html */
649 static mach_timebase_info_data_t timebase_info; 658 static mach_timebase_info_data_t timebase_info;
650 if (timebase_info.denom == 0) { 659 if (timebase_info.denom == 0) {
651 mach_timebase_info(&timebase_info); 660 mach_timebase_info(&timebase_info);
652 } 661 }
653 return mach_absolute_time() * timebase_info.numer / timebase_info.denom 662 return mach_absolute_time() * timebase_info.numer / timebase_info.denom
654 / 1e9; 663 / 1e9;
664 }
655 #endif /* osx mach_absolute_time */ 665 #endif /* osx mach_absolute_time */
656 666
657 /* Fallback for everything else - this will sometimes go backwards */ 667 /* Fallback for everything else - this will sometimes go backwards */
658 return time(NULL); 668 return time(NULL);
659 } 669 }