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Add note about use of tor_memcmp()

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Nick Mathewson 2018-09-05 09:11:53 -04:00
parent 79a7fbb79b
commit dc7c979453
1 changed files with 3 additions and 0 deletions
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3
src/lib/ctime/di_ops.c
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@ -23,6 +23,9 @@
* This implementation differs from memcmp in that its timing behavior is not * This implementation differs from memcmp in that its timing behavior is not
* data-dependent: it should return in the same amount of time regardless of * data-dependent: it should return in the same amount of time regardless of
* the contents of <b>a</b> and <b>b</b>. * the contents of <b>a</b> and <b>b</b>.
*
* Note that if all you care about is equality, this implementation is
* overkill: it would be better to use tor_memeq() or tor_memneq().
*/ */
int int
tor_memcmp(const void *a, const void *b, size_t len) tor_memcmp(const void *a, const void *b, size_t len)