made secret_t non-constant size and added params_t::query_string function

1. removed checking that secret_t is exactly 20 bytes, because its size is not
   so constant anymore.
2. added a query_string function that produces a query string suitable for use
   in GET and POST requests. I'm making use of it when performing direct
   request when establishing associations.

Signed-off-by: Michael Krelin <hacker@klever.net>

1 files changed, 13 insertions, 5 deletions

diff --git a/include/opkele/types.h b/include/opkele/types.h
index 520618d..ca07df5 100644
--- a/include/opkele/types.h
+++ b/include/opkele/types.h
@@ -40,16 +40,16 @@ namespace opkele {
 
             /**
              * xor the secret and hmac together and encode, using base64
-             * @param key_sha1 pointer to the sha1 digest
+             * @param key_d pointer to the message digest
              * @param rv reference to the return value
              */
-            void enxor_to_base64(const unsigned char *key_sha1,string& rv) const;
+            void enxor_to_base64(const unsigned char *key_d,string& rv) const;
             /**
-             * decode base64-encoded secret and xor it with the sha1 digest
-             * @param key_sha1 pointer to the message digest
+             * decode base64-encoded secret and xor it with the message digest
+             * @param key_d pointer to the message digest
              * @param b64 base64-encoded secret value
              */
-            void enxor_from_base64(const unsigned char *key_sha1,const string& b64);
+            void enxor_from_base64(const unsigned char *key_d,const string& b64);
             /**
              * plainly encode to base64 representation
              * @param rv reference to the return value
@@ -161,6 +161,14 @@ namespace opkele {
              * @return the ready-to-use location
              */
             string append_query(const string& url,const char *prefix = "openid.") const;
+
+            /**
+             * make up a query string suitable for use in GET and POST
+             * requests.
+             * @param prefix string to prened to parameter names
+             * @return query string
+             */
+            string query_string(const char *prefix = "openid.") const;
     };
 
     /**