[GNUnet-SVN] [taler-exchange] 02/02: verify deposit signature during audit

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grothoff pushed a commit to branch master
in repository exchange.

commit 06c23275587272873b49801648c7fb52331fbdf9
Author: Christian Grothoff <address@hidden>
AuthorDate: Fri Mar 17 14:09:58 2017 +0100

    verify deposit signature during audit
---
 src/auditor/Makefile.am                     |  1 +
 src/auditor/taler-auditor.c                 | 32 ++++++++++++++++++++++++++++-
 src/exchangedb/plugin_exchangedb_postgres.c |  1 +
 src/exchangedb/test_exchangedb.c            | 20 +++++++++---------
 src/include/taler_exchangedb_plugin.h       |  2 ++
 5 files changed, 45 insertions(+), 11 deletions(-)

diff --git a/src/auditor/Makefile.am b/src/auditor/Makefile.am
index c5d55a4..04e7dcb 100644
--- a/src/auditor/Makefile.am
+++ b/src/auditor/Makefile.am
@@ -20,6 +20,7 @@ taler_auditor_SOURCES = \
 taler_auditor_LDADD = \
   $(LIBGCRYPT_LIBS) \
   $(top_builddir)/src/util/libtalerutil.la \
+  $(top_builddir)/src/json/libtalerjson.la \
   $(top_builddir)/src/wire/libtalerwire.la \
   $(top_builddir)/src/exchangedb/libtalerexchangedb.la \
   $(top_builddir)/src/auditordb/libtalerauditordb.la \
diff --git a/src/auditor/taler-auditor.c b/src/auditor/taler-auditor.c
index f795897..c018a71 100644
--- a/src/auditor/taler-auditor.c
+++ b/src/auditor/taler-auditor.c
@@ -1425,6 +1425,7 @@ refresh_session_cb (void *cls,
  *
  * @param cls closure
  * @param rowid unique serial ID for the deposit in our DB
+ * @param timestamp when did the deposit happen
  * @param merchant_pub public key of the merchant
  * @param coin_pub public key of the coin
  * @param coin_sig signature from the coin
@@ -1441,6 +1442,7 @@ refresh_session_cb (void *cls,
 static int
 deposit_cb (void *cls,
             uint64_t rowid,
+            struct GNUNET_TIME_Absolute timestamp,
             const struct TALER_MerchantPublicKeyP *merchant_pub,
             const struct TALER_CoinSpendPublicKeyP *coin_pub,
             const struct TALER_CoinSpendSignatureP *coin_sig,
@@ -1454,6 +1456,7 @@ deposit_cb (void *cls,
   struct CoinContext *cc = cls;
   struct CoinSummary *cs;
   const struct TALER_EXCHANGEDB_DenominationKeyInformationP *dki;
+  struct TALER_DepositRequestPS dr;
 
   cs = get_coin_summary (cc,
                          coin_pub);
@@ -1464,7 +1467,34 @@ deposit_cb (void *cls,
   }
   dki = cs->dki;
 
-  // TODO: verify signature
+  dr.purpose.purpose = htonl (TALER_SIGNATURE_WALLET_COIN_DEPOSIT);
+  dr.purpose.size = htonl (sizeof (dr));
+  dr.h_proposal_data = *h_proposal_data;
+  if (GNUNET_OK !=
+      TALER_JSON_hash (receiver_wire_account,
+                       &dr.h_wire))
+  {
+    GNUNET_break (0);
+    return GNUNET_SYSERR;
+  }
+  dr.timestamp = GNUNET_TIME_absolute_hton (timestamp);
+  dr.refund_deadline = GNUNET_TIME_absolute_hton (refund_deadline);
+  TALER_amount_hton (&dr.amount_with_fee,
+                     amount_with_fee);
+  dr.deposit_fee = dki->properties.fee_deposit;
+  dr.merchant = *merchant_pub;
+  dr.coin_pub = *coin_pub;
+  if (GNUNET_OK !=
+      GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_WALLET_COIN_DEPOSIT,
+                                  &dr.purpose,
+                                  &coin_sig->eddsa_signature,
+                                  &coin_pub->eddsa_pub))
+  {
+    report_row_inconsistency ("deposit",
+                              rowid,
+                              "invalid signature for coin deposit");
+    return GNUNET_OK;
+  }
 
   // TODO: update expected amounts in 'cc'
   return GNUNET_OK;
diff --git a/src/exchangedb/plugin_exchangedb_postgres.c 
b/src/exchangedb/plugin_exchangedb_postgres.c
index 26d6b87..b00bc7b 100644
--- a/src/exchangedb/plugin_exchangedb_postgres.c
+++ b/src/exchangedb/plugin_exchangedb_postgres.c
@@ -4762,6 +4762,7 @@ postgres_select_deposits_above_serial_id (void *cls,
     }
     cb (cb_cls,
         rowid,
+        deposit.timestamp,
         &deposit.merchant_pub,
         &deposit.coin.coin_pub,
         &deposit.csig,
diff --git a/src/exchangedb/test_exchangedb.c b/src/exchangedb/test_exchangedb.c
index 9b4cfde..2097b0a 100644
--- a/src/exchangedb/test_exchangedb.c
+++ b/src/exchangedb/test_exchangedb.c
@@ -502,33 +502,31 @@ check_transfer_data (void *cls,
   *ok = GNUNET_SYSERR;
 }
 
+
 /**
  * Function called with details about coins that were melted,
  * with the goal of auditing the refresh's execution.
  *
+ *
  * @param cls closure
  * @param rowid unique serial ID for the refresh session in our DB
- * @param merchant_pub public key of the merchant
  * @param coin_pub public key of the coin
  * @param coin_sig signature from the coin
  * @param amount_with_fee amount that was deposited including fee
- * @param h_proposal_data hash of the proposal data known to merchant and 
customer
- * @param refund_deadline by which the merchant adviced that he might want
- *        to get a refund
- * @param wire_deadline by which the merchant adviced that he would like the
- *        wire transfer to be executed
- * @param receiver_wire_account wire details for the merchant, NULL from 
iterate_matching_deposits()
- * @param done flag set if the deposit was already executed (or not)
+ * @param num_newcoins how many coins were issued
+ * @param noreveal_index which index was picked by the exchange in 
cut-and-choose
+ * @param session_hash what is the session hash
  * @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
  */
-int
+static int
 audit_refresh_session_cb (void *cls,
                           uint64_t rowid,
                           const struct TALER_CoinSpendPublicKeyP *coin_pub,
                           const struct TALER_CoinSpendSignatureP *coin_sig,
                           const struct TALER_Amount *amount_with_fee,
                           uint16_t num_newcoins,
-                          uint16_t noreveal_index)
+                          uint16_t noreveal_index,
+                          const struct GNUNET_HashCode *session_hash)
 {
   auditor_row_cnt++;
   return GNUNET_OK;
@@ -953,6 +951,7 @@ deposit_cb (void *cls,
  *
  * @param cls closure
  * @param rowid unique serial ID for the deposit in our DB
+ * @param timestamp when did the deposit happen
  * @param merchant_pub public key of the merchant
  * @param coin_pub public key of the coin
  * @param coin_sig signature from the coin
@@ -969,6 +968,7 @@ deposit_cb (void *cls,
 static int
 audit_deposit_cb (void *cls,
                   uint64_t rowid,
+                  struct GNUNET_TIME_Absolute timestamp,
                   const struct TALER_MerchantPublicKeyP *merchant_pub,
                   const struct TALER_CoinSpendPublicKeyP *coin_pub,
                   const struct TALER_CoinSpendSignatureP *coin_sig,
diff --git a/src/include/taler_exchangedb_plugin.h 
b/src/include/taler_exchangedb_plugin.h
index 524025e..a365e35 100644
--- a/src/include/taler_exchangedb_plugin.h
+++ b/src/include/taler_exchangedb_plugin.h
@@ -590,6 +590,7 @@ typedef void
  *
  * @param cls closure
  * @param rowid unique serial ID for the deposit in our DB
+ * @param timestamp when did the deposit happen
  * @param merchant_pub public key of the merchant
  * @param coin_pub public key of the coin
  * @param coin_sig signature from the coin
@@ -606,6 +607,7 @@ typedef void
 typedef int
 (*TALER_EXCHANGEDB_DepositCallback)(void *cls,
                                     uint64_t rowid,
+                                    struct GNUNET_TIME_Absolute timestamp,
                                     const struct TALER_MerchantPublicKeyP 
*merchant_pub,
                                     const struct TALER_CoinSpendPublicKeyP 
*coin_pub,
                                     const struct TALER_CoinSpendSignatureP 
*coin_sig,

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