Merge remote-tracking branch 'public/bug2385'

1 files changed, 10 insertions, 0 deletions

diff --git a/src/common/util.c b/src/common/util.c
index e5b51b9a94..008e26a20c 100644
--- a/src/common/util.c
+++ b/src/common/util.c
@@ -655,6 +655,16 @@ fast_memcmpstart(const void *mem, size_t memlen,
   return fast_memcmp(mem, prefix, plen);
 }
 
+/** Given a nul-terminated string s, set every character before the nul
+ * to zero. */
+void
+tor_strclear(char *s)
+{
+  while (*s) {
+    *s++ = '\0';
+  }
+}
+
 /** Return a pointer to the first char of s that is not whitespace and
  * not a comment, or to the terminating NUL if no such character exists.
  */