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Add note about use of tor_memcmp()

Nick Mathewson 5 years ago
parent
commit
dc7c979453
1 changed files with 3 additions and 0 deletions
  1. 3 0
      src/lib/ctime/di_ops.c

+ 3 - 0
src/lib/ctime/di_ops.c

@@ -23,6 +23,9 @@
  * 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
  * 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
 tor_memcmp(const void *a, const void *b, size_t len)