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commit 69b2c8b8580ca8ad0b1a3c5aade7f3fcd3e8952f
parent 9d8f7012dad8e52e91749c7b2e8be0286848a0d0
Author: Christian Grothoff <christian@grothoff.org>
Date:   Thu,  5 Feb 2026 17:55:43 +0100

define new unclaim signatures

Diffstat:
M
src/include/taler/taler_crypto_lib.h
 | 
28
++++++++++++++++++++++++++++
M
src/include/taler/taler_signatures.h
 | 
6
++++++
M
src/util/Makefile.am
 | 
2
+-
M
src/util/wallet_signatures.c
 | 
61
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

4 files changed, 96 insertions(+), 1 deletion(-)
diff --git a/src/include/taler/taler_crypto_lib.h b/src/include/taler/taler_crypto_lib.h
@@ -4958,6 +4958,34 @@ TALER_wallet_token_use_verify (
   const struct TALER_TokenUseSignatureP *token_sig);
 
 
+/**
+ * Create order unclaim request signature.
+ *
+ * @param h_contract hash of the contact to unclaim
+ * @param nonce_priv private key of the claim nonce
+ * @param[out] nsig set to the signature made with purpose #TALER_SIGNATURE_WALLET_ORDER_UNCLAIM
+ */
+void
+TALER_wallet_order_unclaim_sign (
+  const struct GNUNET_HashCode *h_contract,
+  const struct GNUNET_CRYPTO_EddsaPrivateKey *nonce_priv,
+  struct GNUNET_CRYPTO_EddsaSignature *nsig);
+
+
+/**
+ * Verify order unclaim signature.
+ *
+ * @param h_contract hash of the contact to be unclaimed
+ * @param nonce nonce from the contract
+ * @param nsig signature  made with purpose #TALER_SIGNATURE_WALLET_ORDER_UNCLAIM
+ */
+enum GNUNET_GenericReturnValue
+TALER_wallet_order_unclaim_verify (
+  const struct GNUNET_HashCode *h_contract,
+  const struct GNUNET_CRYPTO_EddsaPublicKey *nonce,
+  const struct GNUNET_CRYPTO_EddsaSignature *nsig);
+
+
 /* ********************* merchant signing ************************** */
 
 
diff --git a/src/include/taler/taler_signatures.h b/src/include/taler/taler_signatures.h
@@ -407,6 +407,12 @@
 
 
 /**
+ * Signature used to unclaim an order, allowing other wallets to claim it. Signed with the private key of the claim nonce.
+ */
+#define TALER_SIGNATURE_WALLET_ORDER_UNCLAIM 1223
+
+
+/**
  * Signature on a denomination key announcement.
  */
 #define TALER_SIGNATURE_SM_RSA_DENOMINATION_KEY 1250
diff --git a/src/util/Makefile.am b/src/util/Makefile.am
@@ -126,7 +126,7 @@ libtalerutil_la_LIBADD = \
   -lm
 
 libtalerutil_la_LDFLAGS = \
-  -version-info 10:0:0 \
+  -version-info 11:0:1 \
   -no-undefined
 
 
diff --git a/src/util/wallet_signatures.c b/src/util/wallet_signatures.c
@@ -2113,4 +2113,65 @@ TALER_wallet_token_use_verify (
 }
 
 
+GNUNET_NETWORK_STRUCT_BEGIN
+
+/**
+ * Message signed by reserve key.
+ */
+struct TALER_OrderUnclaimPS
+{
+
+  /**
+   * Purpose is #TALER_SIGNATURE_WALLET_ORDER_UNCLAIM
+   */
+  struct GNUNET_CRYPTO_SignaturePurpose purpose;
+
+  /**
+   * Hash of the contract being unclaimed.
+   */
+  struct GNUNET_HashCode h_contract;
+
+};
+
+GNUNET_NETWORK_STRUCT_END
+
+
+void
+TALER_wallet_order_unclaim_sign (
+  const struct GNUNET_HashCode *h_contract,
+  const struct GNUNET_CRYPTO_EddsaPrivateKey *nonce_priv,
+  struct GNUNET_CRYPTO_EddsaSignature *nsig)
+{
+  struct TALER_OrderUnclaimPS rcp = {
+    .purpose.size = htonl (sizeof (rcp)),
+    .purpose.purpose = htonl (TALER_SIGNATURE_WALLET_ORDER_UNCLAIM),
+    .h_contract = *h_contract
+  };
+
+  GNUNET_assert (GNUNET_OK ==
+                 GNUNET_CRYPTO_eddsa_sign_ (nonce_priv,
+                                            &rcp.purpose,
+                                            nsig));
+}
+
+
+enum GNUNET_GenericReturnValue
+TALER_wallet_order_unclaim_verify (
+  const struct GNUNET_HashCode *h_contract,
+  const struct GNUNET_CRYPTO_EddsaPublicKey *nonce,
+  const struct GNUNET_CRYPTO_EddsaSignature *nsig)
+{
+  struct TALER_OrderUnclaimPS rcp = {
+    .purpose.size = htonl (sizeof (rcp)),
+    .purpose.purpose = htonl (TALER_SIGNATURE_WALLET_RESERVE_CLOSE),
+    .h_contract = *h_contract
+  };
+
+  return GNUNET_CRYPTO_eddsa_verify_ (TALER_SIGNATURE_WALLET_ORDER_UNCLAIM,
+                                      &rcp.purpose,
+                                      nsig,
+                                      nonce);
+}
+
+
 /* end of wallet_signatures.c */