Manual Pages  — TIMINGSAFE_BCMP

timingsafe_bcmp, timingsafe_memcmp – timing-safe byte sequence comparisons

SYNOPSIS DESCRIPTION RETURN VALUES SEE ALSO STANDARDS HISTORY

#include <string.h>

int
timingsafe_bcmp(const void *b1, const void *b2, size_t len);

int
timingsafe_memcmp(const void *b1, const void *b2, size_t len);

The timingsafe_bcmp() function returns 0 or not zero if the byte sequence pointed to by b1 compares equal to or not equal to (respectively) the byte sequence pointed to by b2.

The timingsafe_memcmp() function returns a negative value, 0, or positive value if the byte sequence pointed to by b1 compares less than, equal to, or greater than (respectively) the byte sequence pointed to by b2.

The timingsafe_bcmp() and timingsafe_memcmp() functions are FreeBSD extensions.

The timingsafe_bcmp() function first appeared in OpenBSD 4.9 .

The timingsafe_memcmp() function first appeared in OpenBSD 5.6 .

Both functions first appeared in FreeBSD 12.0 .