1 files changed, 8 insertions, 10 deletions
diff --git a/src/openvpn/buffer.h b/src/openvpn/buffer.h
index 5e11de0..93efb09 100644
--- a/src/openvpn/buffer.h
+++ b/src/openvpn/buffer.h
@@ -668,6 +668,10 @@ buf_read_u32 (struct buffer *buf, bool *good)
     }
 }
 
+/**
+ * Compare src buffer contents with match.
+ * *NOT* constant time. Do not use when comparing HMACs.
+ */
 static inline bool
 buf_string_match (const struct buffer *src, const void *match, int size)
 {
@@ -676,6 +680,10 @@ buf_string_match (const struct buffer *src, const void *match, int size)
   return memcmp (BPTR (src), match, size) == 0;
 }
 
+/**
+ * Compare first size bytes of src buffer contents with match.
+ * *NOT* constant time. Do not use when comparing HMACs.
+ */
 static inline bool
 buf_string_match_head (const struct buffer *src, const void *match, int size)
 {
@@ -689,16 +697,6 @@ bool buf_string_compare_advance (struct buffer *src, const char *match);
 int buf_substring_len (const struct buffer *buf, int delim);
 
 /*
- * Bitwise operations
- */
-static inline void
-xor (uint8_t *dest, const uint8_t *src, int len)
-{
-  while (len-- > 0)
-    *dest++ ^= *src++;
-}
-
-/*
  * Print a string which might be NULL
  */
 const char *np (const char *str);