- Introducing CURLOPT_CERTINFO and the corresponding CURLINFO_CERTINFO. By

enabling this feature with CURLOPT_CERTINFO for a request using SSL (HTTPS
  or FTPS), libcurl will gather lots of server certificate info and that info
  can then get extracted by a client after the request has completed with
  curl_easy_getinfo()'s CURLINFO_CERTINFO option. Linus Nielsen Feltzing
  helped me test and smoothen out this feature.

  Unfortunately, this feature currently only works with libcurl built to use
  OpenSSL.

  This feature was sponsored by networking4all.com - thanks!

lib/sslgen.h

@@ -59,7 +59,7 @@ size_t Curl_ssl_version(char *buffer, size_t size);
 bool Curl_ssl_data_pending(const struct connectdata *conn,
                            int connindex);
 int Curl_ssl_check_cxn(struct connectdata *conn);
-
+void Curl_ssl_free_certinfo(struct SessionHandle *data);
 #else
 /* When SSL support is not present, just define away these function calls */
 #define Curl_ssl_init() 1
@@ -78,6 +78,7 @@ int Curl_ssl_check_cxn(struct connectdata *conn);
 #define Curl_ssl_version(x,y) 0
 #define Curl_ssl_data_pending(x,y) 0
 #define Curl_ssl_check_cxn(x) 0
+#define Curl_ssl_free_certinfo(x)
 
 #endif
 
@@ -90,11 +91,6 @@ CURLcode Curl_ssl_addsessionid(struct connectdata *conn,
                                void *ssl_sessionid,
                                size_t idsize);
 
-#if !defined(USE_SSL) && !defined(SSLGEN_C)
-/* set up blank macros for none-SSL builds */
-#define Curl_ssl_close_all(x)
-#endif
-
 #define SSL_SHUTDOWN_TIMEOUT 10000 /* ms */
 
 #endif