sasl_gssapi: Made log_gss_error() a common GSS-API function

Made log_gss_error() a common function so that it can be used in both
the http_negotiate code as well as the curl_sasl_gssapi code.

lib/curl_gssapi.c

@@ -72,4 +72,45 @@ OM_uint32 Curl_gss_init_sec_context(
                               NULL /* time_rec */);
 }
 
+/*
+ * Curl_gss_log_error()
+ *
+ * This is used to log a GSS-API error status.
+ *
+ * Parameters:
+ *
+ * data    [in] - The session handle.
+ * status  [in] - The status code.
+ * prefix  [in] - The prefix of the log message.
+ */
+void Curl_gss_log_error(struct SessionHandle *data, OM_uint32 status,
+                        const char *prefix)
+{
+  OM_uint32 maj_stat;
+  OM_uint32 min_stat;
+  OM_uint32 msg_ctx = 0;
+  gss_buffer_desc status_string;
+  char buf[1024];
+  size_t len;
+
+  snprintf(buf, sizeof(buf), "%s", prefix);
+  len = strlen(buf);
+  do {
+    maj_stat = gss_display_status(&min_stat,
+                                  status,
+                                  GSS_C_MECH_CODE,
+                                  GSS_C_NO_OID,
+                                  &msg_ctx,
+                                  &status_string);
+    if(sizeof(buf) > len + status_string.length + 1) {
+      snprintf(buf + len, sizeof(buf) - len,
+        ": %s", (char*)status_string.value);
+      len += status_string.length;
+    }
+    gss_release_buffer(&min_stat, &status_string);
+  } while(!GSS_ERROR(maj_stat) && msg_ctx != 0);
+
+  infof(data, "%s\n", buf);
+}
+
 #endif /* HAVE_GSSAPI */

lib/curl_gssapi.h

@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 2011 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -55,6 +55,10 @@ OM_uint32 Curl_gss_init_sec_context(
     gss_buffer_t output_token,
     OM_uint32 *ret_flags);
 
+/* Helper to log a GSS - API error status */
+void Curl_gss_log_error(struct SessionHandle *data, OM_uint32 status,
+                        const char *prefix);
+
 #endif /* HAVE_GSSAPI */
 
 #endif /* HEADER_CURL_GSSAPI_H */

lib/http_negotiate.c

@@ -71,36 +71,6 @@ get_gss_name(struct connectdata *conn, bool proxy, gss_name_t *server)
   return GSS_ERROR(major_status) ? -1 : 0;
 }
 
-static void
-log_gss_error(struct connectdata *conn, OM_uint32 error_status,
-              const char *prefix)
-{
-  OM_uint32 maj_stat, min_stat;
-  OM_uint32 msg_ctx = 0;
-  gss_buffer_desc status_string;
-  char buf[1024];
-  size_t len;
-
-  snprintf(buf, sizeof(buf), "%s", prefix);
-  len = strlen(buf);
-  do {
-    maj_stat = gss_display_status(&min_stat,
-                                  error_status,
-                                  GSS_C_MECH_CODE,
-                                  GSS_C_NO_OID,
-                                  &msg_ctx,
-                                  &status_string);
-      if(sizeof(buf) > len + status_string.length + 1) {
-        snprintf(buf + len, sizeof(buf) - len,
-                 ": %s", (char*) status_string.value);
-      len += status_string.length;
-    }
-    gss_release_buffer(&min_stat, &status_string);
-  } while(!GSS_ERROR(maj_stat) && msg_ctx != 0);
-
-  infof(conn->data, "%s\n", buf);
-}
-
 /* returning zero (0) means success, everything else is treated as "failure"
    with no care exactly what the failure was */
 int Curl_input_negotiate(struct connectdata *conn, bool proxy,
@@ -159,7 +129,8 @@ int Curl_input_negotiate(struct connectdata *conn, bool proxy,
   if(GSS_ERROR(major_status)) {
     if(output_token.value)
       gss_release_buffer(&discard_st, &output_token);
-    log_gss_error(conn, minor_status, "gss_init_sec_context() failed: ");
+    Curl_gss_log_error(conn->data, minor_status,
+                       "gss_init_sec_context() failed: ");
     return -1;
   }