From 43f8ab6b48d6a51988c85fdc1bcd4f9d4f1a7a01 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sat, 5 Mar 2022 12:04:13 +0100
Subject: add signing/verifying functions for global fees

---
 src/util/offline_signatures.c | 48 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

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

diff --git a/src/util/offline_signatures.c b/src/util/offline_signatures.c
index bc1625992..5aef4ac3e 100644
--- a/src/util/offline_signatures.c
+++ b/src/util/offline_signatures.c
@@ -472,6 +472,54 @@ TALER_exchange_offline_wire_fee_verify (
 }
 
 
+void
+TALER_exchange_offline_global_fee_sign (
+  struct GNUNET_TIME_Timestamp start_time,
+  struct GNUNET_TIME_Timestamp end_time,
+  const struct TALER_GlobalFeeSet *fees,
+  const struct TALER_MasterPrivateKeyP *master_priv,
+  struct TALER_MasterSignatureP *master_sig)
+{
+  struct TALER_MasterGlobalFeePS kv = {
+    .purpose.purpose = htonl (TALER_SIGNATURE_MASTER_GLOBAL_FEES),
+    .purpose.size = htonl (sizeof (kv)),
+    .start_date = GNUNET_TIME_timestamp_hton (start_time),
+    .end_date = GNUNET_TIME_timestamp_hton (end_time),
+  };
+
+  TALER_global_fee_set_hton (&kv.fees,
+                             fees);
+  GNUNET_CRYPTO_eddsa_sign (&master_priv->eddsa_priv,
+                            &kv,
+                            &master_sig->eddsa_signature);
+}
+
+
+enum GNUNET_GenericReturnValue
+TALER_exchange_offline_global_fee_verify (
+  struct GNUNET_TIME_Timestamp start_time,
+  struct GNUNET_TIME_Timestamp end_time,
+  const struct TALER_GlobalFeeSet *fees,
+  const struct TALER_MasterPublicKeyP *master_pub,
+  const struct TALER_MasterSignatureP *master_sig)
+{
+  struct TALER_MasterGlobalFeePS wf = {
+    .purpose.purpose = htonl (TALER_SIGNATURE_MASTER_GLOBAL_FEES),
+    .purpose.size = htonl (sizeof (wf)),
+    .start_date = GNUNET_TIME_timestamp_hton (start_time),
+    .end_date = GNUNET_TIME_timestamp_hton (end_time)
+  };
+
+  TALER_global_fee_set_hton (&wf.fees,
+                             fees);
+  return
+    GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_GLOBAL_FEES,
+                                &wf,
+                                &master_sig->eddsa_signature,
+                                &master_pub->eddsa_pub);
+}
+
+
 void
 TALER_exchange_offline_extension_config_hash_sign (
   const struct TALER_ExtensionConfigHashP *h_config,
-- 
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