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authorChristian Grothoff <christian@grothoff.org>2019-07-27 20:43:52 +0200
committerChristian Grothoff <christian@grothoff.org>2019-07-27 20:43:52 +0200
commitccfe99a82d700198b4d5e97a0aad64f8b13d7345 (patch)
treecbc6a7254ce282102c4d6b197f747cf364681117 /src
parent1057333666ad3aa17568255f0b7ffa1a2d9bcf40 (diff)
downloadexchange-ccfe99a82d700198b4d5e97a0aad64f8b13d7345.tar.gz
exchange-ccfe99a82d700198b4d5e97a0aad64f8b13d7345.tar.bz2
exchange-ccfe99a82d700198b4d5e97a0aad64f8b13d7345.zip
more denom sig checking in auditor
Diffstat (limited to 'src')
-rw-r--r--src/auditor/taler-auditor.c101
-rw-r--r--src/exchange/taler-exchange-httpd_track_transfer.c2
-rw-r--r--src/exchangedb/plugin_exchangedb_postgres.c28
-rw-r--r--src/exchangedb/test_exchangedb.c2
-rw-r--r--src/include/taler_exchangedb_plugin.h2
5 files changed, 92 insertions, 43 deletions
diff --git a/src/auditor/taler-auditor.c b/src/auditor/taler-auditor.c
index c8becdaa..7caaddf1 100644
--- a/src/auditor/taler-auditor.c
+++ b/src/auditor/taler-auditor.c
@@ -30,6 +30,7 @@
* (While as the exchange could easily falsify those, we should
* probably check as otherwise insider *without* RSA private key
* access could still create false paybacks to drain exchange funds!)
+ * => See FIXME42 for last place (likely) missing!
* - error handling if denomination keys are used that are not known to the
* auditor is, eh, awful / non-existent. We just throw the DB's constraint
* violation back at the user. Great UX.
@@ -1081,7 +1082,9 @@ handle_reserve_out (void *cls,
* @param timestamp when did we receive the payback request
* @param amount how much should be added back to the reserve
* @param reserve_pub public key of the reserve
- * @param coin public information about the coin
+ * @param coin public information about the coin, denomination signature is
+ * already verified in #check_payback()
+ * @param denom_pub public key of the denomionation of @a coin
* @param coin_sig signature with @e coin_pub of type #TALER_SIGNATURE_WALLET_COIN_PAYBACK
* @param coin_blind blinding factor used to blind the coin
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
@@ -1112,22 +1115,6 @@ handle_payback_by_reserve (void *cls,
ppr.last_reserve_payback_serial_id = rowid + 1;
// FIXME: should probably check that denom_pub hashes to this hash code!
pr.h_denom_pub = coin->denom_pub_hash;
-
- if (GNUNET_OK !=
- TALER_test_coin_valid (coin,
- denom_pub))
- {
- report (report_bad_sig_losses,
- json_pack ("{s:s, s:I, s:o, s:o}",
- "operation", "payback-verify",
- "row", (json_int_t) rowid,
- "loss", TALER_JSON_from_amount (amount),
- "key_pub", GNUNET_JSON_from_data_auto (&pr.h_denom_pub)));
- GNUNET_break (GNUNET_OK ==
- TALER_amount_add (&total_bad_sig_loss,
- &total_bad_sig_loss,
- amount));
- }
pr.purpose.purpose = htonl (TALER_SIGNATURE_WALLET_COIN_PAYBACK);
pr.purpose.size = htonl (sizeof (pr));
pr.coin_pub = coin->coin_pub;
@@ -1944,12 +1931,12 @@ struct WireCheckContext
* @return #GNUNET_OK on success, #GNUNET_SYSERR on error
*/
static int
-check_transaction_history (const struct TALER_CoinSpendPublicKeyP *coin_pub,
- const struct GNUNET_HashCode *h_contract_terms,
- const struct TALER_MerchantPublicKeyP *merchant_pub,
- const struct TALER_EXCHANGEDB_DenominationKeyInformationP *dki,
- const struct TALER_EXCHANGEDB_TransactionList *tl_head,
- struct TALER_Amount *merchant_gain)
+check_transaction_history_for_deposit (const struct TALER_CoinSpendPublicKeyP *coin_pub,
+ const struct GNUNET_HashCode *h_contract_terms,
+ const struct TALER_MerchantPublicKeyP *merchant_pub,
+ const struct TALER_EXCHANGEDB_DenominationKeyInformationP *dki,
+ const struct TALER_EXCHANGEDB_TransactionList *tl_head,
+ struct TALER_Amount *merchant_gain)
{
struct TALER_Amount expenditures;
struct TALER_Amount refunds;
@@ -2237,6 +2224,7 @@ check_transaction_history (const struct TALER_CoinSpendPublicKeyP *coin_pub,
* @param account_details where did we transfer the funds?
* @param exec_time execution time of the wire transfer (should be same for all callbacks with the same @e cls)
* @param h_contract_terms which proposal was this payment about
+ * @param denom_pub denomination of @a coin_pub
* @param coin_pub which public key was this payment about
* @param coin_value amount contributed by this coin in total (with fee)
* @param deposit_fee applicable deposit fee for this coin, actual
@@ -2250,6 +2238,7 @@ wire_transfer_information_cb (void *cls,
const json_t *account_details,
struct GNUNET_TIME_Absolute exec_time,
const struct GNUNET_HashCode *h_contract_terms,
+ const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_Amount *coin_value,
const struct TALER_Amount *deposit_fee)
@@ -2337,16 +2326,47 @@ wire_transfer_information_cb (void *cls,
"could not find denomination key for coin claimed in aggregation");
return;
}
+ if (GNUNET_OK !=
+ TALER_test_coin_valid (coin,
+ denom_pub))
+ {
+ report (report_bad_sig_losses,
+ json_pack ("{s:s, s:I, s:o, s:o}",
+ "operation", "wire",
+ "row", (json_int_t) rowid,
+ "loss", TALER_JSON_from_amount (coin_value),
+ "key_pub", GNUNET_JSON_from_data_auto (&dki->properties.denom_hash)));
+ GNUNET_break (GNUNET_OK ==
+ TALER_amount_add (&total_bad_sig_loss,
+ &total_bad_sig_loss,
+ coin_value));
+
+ edb->free_coin_transaction_list (edb->cls,
+ tl);
+ wcc->qs = GNUNET_DB_STATUS_HARD_ERROR;
+ report_row_inconsistency ("deposit",
+ rowid,
+ "coin denomination signature invalid");
+ return;
+ }
GNUNET_assert (NULL != dki); /* mostly to help static analysis */
/* Check transaction history to see if it supports aggregate
valuation */
- check_transaction_history (coin_pub,
- h_contract_terms,
- merchant_pub,
- dki,
- tl,
- &computed_value);
+ if (GNUNET_OK !=
+ check_transaction_history_for_deposit (coin_pub,
+ h_contract_terms,
+ merchant_pub,
+ dki,
+ tl,
+ &computed_value))
+ {
+ wcc->qs = GNUNET_DB_STATUS_HARD_ERROR;
+ report_row_inconsistency ("coin history",
+ rowid,
+ "failed to verify coin history (for deposit)");
+ return;
+ }
if (GNUNET_SYSERR ==
TALER_amount_subtract (&coin_value_without_fee,
coin_value,
@@ -3397,6 +3417,9 @@ refresh_session_cb (void *cls,
cc->qs = qs;
return GNUNET_SYSERR;
}
+ // FIXME42: should verify that the
+ // coin was properly signed via TALER_test_coin_valid() here!
+ // (but would need more information from DB to do so!)
/* verify melt signature */
rmc.purpose.purpose = htonl (TALER_SIGNATURE_WALLET_COIN_MELT);
@@ -4007,6 +4030,7 @@ refund_cb (void *cls,
* @param rowid row identifier used to uniquely identify the payback operation
* @param amount how much should be added back to the reserve
* @param coin public information about the coin
+ * @param denom_pub public key of the denomionation of @a coin
* @param coin_sig signature with @e coin_pub of type #TALER_SIGNATURE_WALLET_COIN_PAYBACK
* @param coin_blind blinding factor used to blind the coin
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
@@ -4025,6 +4049,21 @@ check_payback (struct CoinContext *cc,
enum GNUNET_DB_QueryStatus qs;
const struct TALER_EXCHANGEDB_DenominationKeyInformationP *dki;
+ if (GNUNET_OK !=
+ TALER_test_coin_valid (coin,
+ denom_pub))
+ {
+ report (report_bad_sig_losses,
+ json_pack ("{s:s, s:I, s:o, s:o}",
+ "operation", "payback",
+ "row", (json_int_t) rowid,
+ "loss", TALER_JSON_from_amount (amount),
+ "key_pub", GNUNET_JSON_from_data_auto (&pr.h_denom_pub)));
+ GNUNET_break (GNUNET_OK ==
+ TALER_amount_add (&total_bad_sig_loss,
+ &total_bad_sig_loss,
+ amount));
+ }
qs = get_denomination_info (denom_pub,
&dki,
&pr.h_denom_pub);
@@ -4677,8 +4716,8 @@ setup_sessions_and_run ()
*/
static void
test_master_present (void *cls,
- const struct TALER_MasterPublicKeyP *mpub,
- const char *exchange_url)
+ const struct TALER_MasterPublicKeyP *mpub,
+ const char *exchange_url)
{
int *found = cls;
diff --git a/src/exchange/taler-exchange-httpd_track_transfer.c b/src/exchange/taler-exchange-httpd_track_transfer.c
index 1ed62d6c..80a29ee0 100644
--- a/src/exchange/taler-exchange-httpd_track_transfer.c
+++ b/src/exchange/taler-exchange-httpd_track_transfer.c
@@ -253,6 +253,7 @@ handle_transaction_data (void *cls,
const json_t *wire,
struct GNUNET_TIME_Absolute exec_time,
const struct GNUNET_HashCode *h_contract_terms,
+ const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_Amount *deposit_value,
const struct TALER_Amount *deposit_fee)
@@ -262,6 +263,7 @@ handle_transaction_data (void *cls,
struct TEH_TrackTransferDetail *wdd;
char *wire_method;
+ (void) denom_pub;
if (GNUNET_SYSERR == ctx->is_valid)
return;
if (NULL == (wire_method = TALER_JSON_wire_to_method (wire)))
diff --git a/src/exchangedb/plugin_exchangedb_postgres.c b/src/exchangedb/plugin_exchangedb_postgres.c
index d8b019ba..c89e4472 100644
--- a/src/exchangedb/plugin_exchangedb_postgres.c
+++ b/src/exchangedb/plugin_exchangedb_postgres.c
@@ -1307,6 +1307,7 @@ postgres_prepare (PGconn *db_conn)
",denom.fee_deposit_val"
",denom.fee_deposit_frac"
",denom.fee_deposit_curr"
+ ",denom.denom_pub"
" FROM aggregation_tracking"
" JOIN deposits"
" USING (deposit_serial_id)"
@@ -4957,12 +4958,14 @@ handle_wt_result (void *cls,
struct GNUNET_TIME_Absolute exec_time;
struct TALER_Amount amount_with_fee;
struct TALER_Amount deposit_fee;
+ struct TALER_DenominationPublicKey denom_pub;
json_t *wire;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_uint64 ("aggregation_serial_id", &rowid),
GNUNET_PQ_result_spec_auto_from_type ("h_contract_terms", &h_contract_terms),
TALER_PQ_result_spec_json ("wire", &wire),
GNUNET_PQ_result_spec_auto_from_type ("h_wire", &h_wire),
+ GNUNET_PQ_result_spec_rsa_public_key ("denom_pub", &denom_pub.rsa_public_key),
GNUNET_PQ_result_spec_auto_from_type ("coin_pub", &coin_pub),
GNUNET_PQ_result_spec_auto_from_type ("merchant_pub", &merchant_pub),
TALER_PQ_result_spec_absolute_time ("execution_date", &exec_time),
@@ -4981,15 +4984,16 @@ handle_wt_result (void *cls,
return;
}
ctx->cb (ctx->cb_cls,
- rowid,
- &merchant_pub,
- &h_wire,
+ rowid,
+ &merchant_pub,
+ &h_wire,
wire,
- exec_time,
- &h_contract_terms,
- &coin_pub,
- &amount_with_fee,
- &deposit_fee);
+ exec_time,
+ &h_contract_terms,
+ &denom_pub,
+ &coin_pub,
+ &amount_with_fee,
+ &deposit_fee);
GNUNET_PQ_cleanup_result (rs);
}
}
@@ -5025,10 +5029,10 @@ postgres_lookup_wire_transfer (void *cls,
ctx.status = GNUNET_OK;
/* check if the melt record exists and get it */
qs = GNUNET_PQ_eval_prepared_multi_select (session->conn,
- "lookup_transactions",
- params,
- &handle_wt_result,
- &ctx);
+ "lookup_transactions",
+ params,
+ &handle_wt_result,
+ &ctx);
if (GNUNET_OK != ctx.status)
return GNUNET_DB_STATUS_HARD_ERROR;
return qs;
diff --git a/src/exchangedb/test_exchangedb.c b/src/exchangedb/test_exchangedb.c
index cab05f08..ef477548 100644
--- a/src/exchangedb/test_exchangedb.c
+++ b/src/exchangedb/test_exchangedb.c
@@ -749,6 +749,7 @@ cb_wt_never (void *cls,
const json_t *wire,
struct GNUNET_TIME_Absolute exec_time,
const struct GNUNET_HashCode *h_contract_terms,
+ const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_Amount *coin_value,
const struct TALER_Amount *coin_fee)
@@ -793,6 +794,7 @@ cb_wt_check (void *cls,
const json_t *wire,
struct GNUNET_TIME_Absolute exec_time,
const struct GNUNET_HashCode *h_contract_terms,
+ const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_Amount *coin_value,
const struct TALER_Amount *coin_fee)
diff --git a/src/include/taler_exchangedb_plugin.h b/src/include/taler_exchangedb_plugin.h
index 6d53f1f0..a065534b 100644
--- a/src/include/taler_exchangedb_plugin.h
+++ b/src/include/taler_exchangedb_plugin.h
@@ -1055,6 +1055,7 @@ typedef void
* @param account_details which account did the transfer go to?
* @param exec_time execution time of the wire transfer (should be same for all callbacks with the same @e cls)
* @param h_contract_terms which proposal was this payment about
+ * @param denom_pub denomination of @a coin_pub
* @param coin_pub which public key was this payment about
* @param coin_value amount contributed by this coin in total (with fee)
* @param coin_fee applicable fee for this coin
@@ -1067,6 +1068,7 @@ typedef void
const json_t *account_details,
struct GNUNET_TIME_Absolute exec_time,
const struct GNUNET_HashCode *h_contract_terms,
+ const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_Amount *coin_value,
const struct TALER_Amount *coin_fee);