From ef4238874f6628a9ee4464ad3b70a7fde96d518b Mon Sep 17 00:00:00 2001
From: Özgür Kesim <oec-taler@kesim.org>
Date: Mon, 27 Dec 2021 23:24:48 +0100
Subject: [age restriction] progress 9/n

More worke towards support for extensions and age restriction:

- taler-exchange-httpd_management_extensions.c almost completed
  - handling of request implemented
  - stub "set_extensions" for database transaction added

- utility functions added
  - TALER_exchange_offline_extension_agemask_{sign,verify}
  - TALER_agemask_parse_json
---
 src/util/offline_signatures.c | 63 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)

(limited to 'src/util/offline_signatures.c')

diff --git a/src/util/offline_signatures.c b/src/util/offline_signatures.c
index cd9dceca..7fbec826 100644
--- a/src/util/offline_signatures.c
+++ b/src/util/offline_signatures.c
@@ -490,4 +490,67 @@ TALER_exchange_offline_wire_fee_verify (
 }
 
 
+void
+TALER_exchange_offline_extension_agemask_sign (
+  const struct TALER_AgeMask mask,
+  const struct TALER_MasterPrivateKeyP *master_priv,
+  struct TALER_MasterSignatureP *master_sig)
+{
+  struct TALER_MasterExtensionAgeRestrictionPS ar = {
+    .purpose.purpose = htonl (TALER_SIGNATURE_MASTER_EXTENSION),
+    .purpose.size = htonl (sizeof(ar)),
+    .mask = mask
+  };
+  GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
+                            &ar,
+                            &master_sig->eddsa_signature);
+}
+
+
+enum GNUNET_GenericReturnValue
+TALER_exchange_offline_extension_agemask_verify (
+  const struct TALER_AgeMask mask,
+  const struct TALER_MasterPublicKeyP *master_pub,
+  const struct TALER_MasterSignatureP *master_sig
+  )
+{
+  struct TALER_MasterExtensionAgeRestrictionPS ar = {
+    .purpose.purpose = htonl (TALER_SIGNATURE_MASTER_EXTENSION),
+    .purpose.size = htonl (sizeof(ar)),
+    .mask = mask
+  };
+  return
+    GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_EXTENSION,
+                                &ar,
+                                &master_sig->eddsa_signature,
+                                &master_pub->eddsa_pub);
+}
+
+
+#if 0
+/* TODO peer2peer */
+void
+TALER_exchange_offline_extension_p2p_sign (
+  // TODO
+  const struct TALER_MasterPrivateKeyP *master_priv,
+  struct TALER_MasterSignatureP *master_sig)
+{
+  // TODO
+}
+
+
+enum GNUNET_GenericReturnValue
+TALER_exchange_offline_extension_p2p_verify (
+  // TODO
+  const struct TALER_MasterPublicKeyP *master_pub,
+  const struct TALER_MasterSignatureP *master_sig,
+  )
+{
+  // TODO
+  return GNUNET_FALSE;
+}
+
+
+#endif
+
 /* end of offline_signatures.c */
-- 
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