cookie: case-insensitive hashing for the domains

closes #2458

1 files changed, 17 insertions, 2 deletions

diff --git a/lib/cookie.c b/lib/cookie.c
index ec3b1bf9a..5aa959690 100644
--- a/lib/cookie.c
+++ b/lib/cookie.c
@@ -90,7 +90,6 @@ Example set of cookies:
 
 #include "urldata.h"
 #include "cookie.h"
-#include "hash.h"
 #include "strtok.h"
 #include "sendf.h"
 #include "slist.h"
@@ -266,6 +265,22 @@ static const char *get_top_domain(const char * const domain, size_t *outlen)
 }
 
 /*
+ * A case-insensitive hash for the cookie domains.
+ */
+static size_t cookie_hash_domain(const char *domain, const size_t len)
+{
+  const char *end = domain + len;
+  unsigned long h = 5381;
+
+  while(domain < end) {
+    h += h << 5;
+    h ^= (unsigned long) Curl_raw_toupper(*domain++);
+  }
+
+  return (h % COOKIE_HASH_SIZE);
+}
+
+/*
  * Hash this domain.
  */
 static size_t cookiehash(const char * const domain)
@@ -277,7 +292,7 @@ static size_t cookiehash(const char * const domain)
     return 0;
 
   top = get_top_domain(domain, &len);
-  return Curl_hash_str((void *) top, len, COOKIE_HASH_SIZE);
+  return cookie_hash_domain(top, len);
 }
 
 /*