2 files changed, 40 insertions, 3 deletions
diff --git a/src/util/exchange_signatures.c b/src/util/exchange_signatures.c
index 6f8ebdaff..3aa464aa7 100644
--- a/src/util/exchange_signatures.c
+++ b/src/util/exchange_signatures.c
@@ -413,6 +413,34 @@ TALER_exchange_online_age_withdraw_confirmation_sign (
 }
 
 
+enum GNUNET_GenericReturnValue
+TALER_exchange_online_age_withdraw_confirmation_verify (
+  const struct TALER_AgeWithdrawCommitmentHashP *h_commitment,
+  uint32_t noreveal_index,
+  const struct TALER_ExchangePublicKeyP *exchange_pub,
+  const struct TALER_ExchangeSignatureP *exchange_sig)
+{
+  struct TALER_AgeWithdrawConfirmationPS confirm = {
+    .purpose.purpose = htonl (TALER_SIGNATURE_EXCHANGE_CONFIRM_AGE_WITHDRAW),
+    .purpose.size = htonl (sizeof (confirm)),
+    .h_commitment = *h_commitment,
+    .noreveal_index = htonl (noreveal_index)
+  };
+
+  if (GNUNET_OK !=
+      GNUNET_CRYPTO_eddsa_verify (
+        TALER_SIGNATURE_EXCHANGE_CONFIRM_AGE_WITHDRAW,
+        &confirm,
+        &exchange_sig->eddsa_signature,
+        &exchange_pub->eddsa_pub))
+  {
+    GNUNET_break_op (0);
+    return GNUNET_SYSERR;
+  }
+  return GNUNET_OK;
+}
+
+
 /* TODO:oec: add signature for age-withdraw, age-reveal */
 
 
diff --git a/src/util/wallet_signatures.c b/src/util/wallet_signatures.c
index 34d097d77..823641ed4 100644
--- a/src/util/wallet_signatures.c
+++ b/src/util/wallet_signatures.c
@@ -22,6 +22,7 @@
 #include "platform.h"
 #include "taler_util.h"
 #include "taler_signatures.h"
+#include <gnunet/gnunet_common.h>
 
 
 GNUNET_NETWORK_STRUCT_BEGIN
@@ -621,9 +622,9 @@ struct TALER_AgeWithdrawRequestPS
   struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
 
   /**
-   * Hash of the commitment of n*kappa coins
+   * The reserve's public key
    */
-  struct TALER_AgeWithdrawCommitmentHashP h_commitment GNUNET_PACKED;
+  struct TALER_ReservePublicKeyP reserve_pub;
 
   /**
    * Value of the coin being exchanged (matching the denomination key)
@@ -635,7 +636,12 @@ struct TALER_AgeWithdrawRequestPS
   struct TALER_AmountNBO amount_with_fee;
 
   /**
-   * The mask that defines the age groups
+   * Running SHA512 hash of the commitment of n*kappa coins
+   */
+  struct TALER_AgeWithdrawCommitmentHashP h_commitment;
+
+  /**
+   * The mask that defines the age groups.  MUST be the same for all denominations.
    */
   struct TALER_AgeMask mask;
 
@@ -665,6 +671,8 @@ TALER_wallet_age_withdraw_sign (
     .max_age_group = TALER_get_age_group (mask, max_age)
   };
 
+  GNUNET_CRYPTO_eddsa_key_get_public (&reserve_priv->eddsa_priv,
+                                      &req.reserve_pub.eddsa_pub);
   TALER_amount_hton (&req.amount_with_fee,
                      amount_with_fee);
   GNUNET_CRYPTO_eddsa_sign (&reserve_priv->eddsa_priv,
@@ -685,6 +693,7 @@ TALER_wallet_age_withdraw_verify (
   struct TALER_AgeWithdrawRequestPS awsrd = {
     .purpose.size = htonl (sizeof (awsrd)),
     .purpose.purpose = htonl (TALER_SIGNATURE_WALLET_RESERVE_AGE_WITHDRAW),
+    .reserve_pub = *reserve_pub,
     .h_commitment = *h_commitment,
     .mask = *mask,
     .max_age_group = TALER_get_age_group (mask, max_age)