Curl_input_digest: require space after Digest

Closes #6993

diff --git a/lib/http_digest.c b/lib/http_digest.c
index 132f3930c8acf114bf0d98d6b44487ca395b6505..049b232e014ea39595ac9ddda5b06eca3a5c7ba9 100644 (file)
--- a/lib/http_digest.c
+++ b/lib/http_digest.c
@@ -56,7 +56,7 @@ CURLcode Curl_input_digest(struct Curl_easy *data,
     digest = &data->state.digest;
   }
 
-  if(!checkprefix("Digest", header))
+  if(!checkprefix("Digest", header) || !ISSPACE(header[6]))
     return CURLE_BAD_CONTENT_ENCODING;
 
   header += strlen("Digest");