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diff --git a/src/include/fast_factor.h b/src/include/fast_factor.h
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+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* include/fast_factor.h - Convenience inline functions for FAST factors */
+/*
+ * Copyright (C) 2011 by the Massachusetts Institute of Technology.
+ * All rights reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+#ifndef FAST_FACTOR_H
+
+/*
+ * Returns success with a null armor_key if FAST is available but not in use.
+ * Returns failure if the client library does not support FAST.
+ */
+static inline krb5_error_code
+fast_get_armor_key(krb5_context context, krb5_clpreauth_get_data_fn get_data,
+                   krb5_clpreauth_rock rock, krb5_keyblock **armor_key)
+{
+    krb5_error_code retval = 0;
+    krb5_data *data;
+    retval = get_data(context, rock, krb5_clpreauth_fast_armor, &data);
+    if (retval == 0) {
+        *armor_key = (krb5_keyblock *) data->data;
+        data->data = NULL;
+        get_data(context, rock, krb5_clpreauth_free_fast_armor, &data);
+    }
+    return retval;
+}
+
+static inline krb5_error_code
+fast_kdc_get_armor_key(krb5_context context,
+                       krb5_kdcpreauth_get_data_fn get_entry,
+                       krb5_kdc_req *request,
+                       struct _krb5_db_entry_new *client,
+                       krb5_keyblock **armor_key)
+{
+    krb5_error_code retval;
+    krb5_data *data;
+    retval = get_entry(context, request, client, krb5_kdcpreauth_fast_armor,
+                       &data);
+    if (retval == 0) {
+        *armor_key = (krb5_keyblock *) data->data;
+        data->data = NULL;
+        get_entry(context, request, client,
+                  krb5_kdcpreauth_free_fast_armor, &data);
+    }
+    return retval;
+}
+
+
+
+static inline krb5_error_code
+fast_kdc_replace_reply_key(krb5_context context,
+                           krb5_kdcpreauth_get_data_fn get_data,
+                           krb5_kdc_req *request)
+{
+    return 0;
+}
+
+static inline krb5_error_code
+fast_set_kdc_verified(krb5_context context,
+                      krb5_clpreauth_get_data_fn get_data,
+                      krb5_clpreauth_rock rock)
+{
+    return 0;
+}
+
+#endif /* FAST_FACTOR_H */