1 files changed, 70 insertions, 0 deletions

diff --git a/src/service/reclaim/did_misc.c b/src/service/reclaim/did_misc.c
new file mode 100644
index 000000000..32b127b2b
--- /dev/null
+++ b/src/service/reclaim/did_misc.c
@@ -0,0 +1,70 @@
+/*
+   This file is part of GNUnet.
+   Copyright (C) 2012-2022 GNUnet e.V.
+
+   GNUnet is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Affero General Public License as published
+   by the Free Software Foundation, either version 3 of the License,
+   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
+   Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+     SPDX-License-Identifier: AGPL3.0-or-later
+ */
+
+/**
+ * @author Martin Schanzenbach
+ * @file src/reclaim/did_misc.c
+ * @brief Helper functions for DIDs
+ *
+ */
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_identity_service.h"
+#include "jansson.h"
+#include "did.h"
+
+char*
+DID_ego_to_did (struct GNUNET_IDENTITY_Ego *ego)
+{
+  struct GNUNET_CRYPTO_PublicKey pkey; // Get Public key
+  char *pkey_str;
+  char *did_str;
+  size_t pkey_len;
+
+  GNUNET_IDENTITY_ego_get_public_key (ego, &pkey);
+
+  pkey_str = GNUNET_CRYPTO_public_key_to_string (&pkey);
+  GNUNET_asprintf (&did_str, "%s%s",
+                   GNUNET_RECLAIM_DID_METHOD_PREFIX,
+                   pkey_str);
+
+  GNUNET_free (pkey_str);
+  return did_str;
+}
+
+enum GNUNET_GenericReturnValue
+DID_public_key_from_did (const char* did,
+                         struct GNUNET_CRYPTO_PublicKey *pk)
+{
+  /* FIXME-MSC: I suggest introducing a
+   * #define MAX_DID_LENGTH <something>
+   * here and use it for parsing
+   */
+  char pkey_str[59];
+
+  if ((1 != (sscanf (did, GNUNET_RECLAIM_DID_METHOD_PREFIX"%58s", pkey_str))) ||
+      (GNUNET_OK != GNUNET_CRYPTO_public_key_from_string (pkey_str, pk)))
+  {
+    return GNUNET_SYSERR;
+  }
+  return GNUNET_OK;
+}
+
+