--- /dev/null
+/*
+ This file is part of GNUnet
+ Copyright (C) 2012-2014 GNUnet e.V.
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+ */
+
+/**
+ * @author Martin Schanzenbach
+ *
+ * @file
+ * API to the Credential service
+ *
+ * @defgroup credential Credential service
+ * Credentials
+ *
+ * @{
+ */
+#ifndef GNUNET_CREDENTIAL_SERVICE_H
+#define GNUNET_CREDENTIAL_SERVICE_H
+
+#include "gnunet_util_lib.h"
+#include "gnunet_gns_service.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#if 0 /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+
+/**
+ * Connection to the Credential service.
+ */
+struct GNUNET_CREDENTIAL_Handle;
+
+/**
+ * Handle to control a lookup operation.
+ */
+struct GNUNET_CREDENTIAL_LookupRequest;
+
+
+/**
+ * Initialize the connection with the Credential service.
+ *
+ * @param cfg configuration to use
+ * @return handle to the Credential service, or NULL on error
+ */
+struct GNUNET_Credential_Handle *
+GNUNET_CREDENTIAL_connect (const struct GNUNET_CONFIGURATION_Handle *cfg);
+
+
+/**
+ * Shutdown connection with the Credentail service.
+ *
+ * @param handle connection to shut down
+ */
+void
+GNUNET_CREDENTIAL_disconnect (struct GNUNET_CREDENTIAL_Handle *handle);
+
+
+/**
+ * Iterator called on obtained result for a Credential lookup.
+ *
+ * @param cls closure
+ * @param issuer the issuer chain
+ * @param issuer_len length of issuer chain
+ * @param rd the records in reply
+ */
+typedef void (*GNUNET_CREDENTIAL_LookupResultProcessor) (void *cls,
+ struct GNUNET_IDENTITY_Ego *issuer,
+ uint16_t issuer_len,
+ const struct GNUNET_CREDENTIAL_Value *value);
+
+
+/**
+ * Perform an asynchronous lookup operation for a credential.
+ *
+ * @param handle handle to the Credential service
+ * @param credential the credential to look up
+ * @param subject Ego to check the credential for
+ * @param proc function to call on result
+ * @param proc_cls closure for processor
+ * @return handle to the queued request
+ */
+struct GNUNET_CREDENTIAL_LookupRequest *
+GNUNET_CREDENTIAL_lookup (struct GNUNET_CREDENTIAL_Handle *handle,
+ const char *credential,
+ const struct GNUNET_IDENTITY_Ego *subject,
+ GNUNET_CREDENTIAL_LookupResultProcessor proc,
+ void *proc_cls);
+
+
+/**
+ * Issue a credential to an identity
+ *
+ * @param handle handle to the Credential service
+ * @param issuer the identity that issues the credential
+ * @param subject the subject of the credential
+ * @param credential the name of the credential
+ * @param value the value of the credential
+ * @return handle to the queued request
+ */
+struct GNUNET_CREDENTIAL_IssueRequest *
+GNUNET_CREDENTIAL_issue (struct GNUNET_CREDENTIAL_Handle *handle,
+ struct GNUNET_IDENTITY_Ego *issuer,
+ struct GNUNET_IDENTITY_Ego *subject,
+ const char *credential,
+ struct GNUNET_CREDENTIAL_Value *value,
+ GNUNET_CREDENTIAL_IssueResultProcessor proc,
+ void *proc_cls);
+
+/**
+ * Remove a credential
+ *
+ * @param handle handle to the Credential service
+ * @param issuer the identity that issued the credential
+ * @param subject the subject of the credential
+ * @param credential the name of the credential
+ * @return handle to the queued request
+ */
+struct GNUNET_CREDENTIAL_IssueRequest *
+GNUNET_CREDENTIAL_remove (struct GNUNET_CREDENTIAL_Handle *handle,
+ struct GNUNET_IDENTITY_Ego *issuer,
+ struct GNUNET_IDENTITY_Ego *subject,
+ const char *credential,
+ GNUNET_CREDENTIAL_IssueResultProcessor proc,
+ void *proc_cls);
+
+
+
+/**
+ * Cancel pending lookup request
+ *
+ * @param lr the lookup request to cancel
+ */
+void
+GNUNET_CREDENTIAL_lookup_cancel (struct GNUNET_CREDENTIAL_LookupRequest *lr);
+
+
+#if 0 /* keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+/** @} */ /* end of group */