chunk: Add helper to hash chunks via pointer

src/libstrongswan/utils/chunk.c

@@ -1088,6 +1088,14 @@ uint32_t chunk_hash(chunk_t chunk)
 	return chunk_mac(chunk, hash_key);
 }
 
+/*
+ * Described in header.
+ */
+uint32_t chunk_hash_ptr(chunk_t *chunk)
+{
+	return chunk_hash(*chunk);
+}
+
 /**
  * Described in header.
  */

src/libstrongswan/utils/chunk.h

@@ -414,6 +414,15 @@ void chunk_hash_seed();
  */
 uint32_t chunk_hash(chunk_t chunk);
 
+/**
+ * Same as chunk_hash() but takes a pointer to a chunk. Can be used in
+ * hashtables.
+ *
+ * @param chunk			pointer to chunk to hash
+ * @return				hash value
+ */
+uint32_t chunk_hash_ptr(chunk_t *chunk);
+
 /**
  * Incremental version of chunk_hash. Use this to hash two or more chunks.
  *