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-rw-r--r--src/lib/exchange_api_common.h10
-rw-r--r--src/lib/exchange_api_reserves_open.c129
2 files changed, 121 insertions, 18 deletions
diff --git a/src/lib/exchange_api_common.h b/src/lib/exchange_api_common.h
index 80c36daf..1b9ddce3 100644
--- a/src/lib/exchange_api_common.h
+++ b/src/lib/exchange_api_common.h
@@ -129,12 +129,10 @@ TALER_EXCHANGE_check_coin_amount_conflict_ (
/**
- * Verify that @a proof contains a coin history
- * that demonstrates that @a coin_pub was previously
- * used with a denomination key that is different
- * from @a ch_denom_pub. Note that the coin history
- * MUST have been checked before using
- * #TALER_EXCHANGE_check_coin_amount_conflict_().
+ * Verify that @a proof contains a coin history that demonstrates that @a
+ * coin_pub was previously used with a denomination key that is different from
+ * @a ch_denom_pub. Note that the coin history MUST have been checked before
+ * using #TALER_EXCHANGE_check_coin_amount_conflict_().
*
* @param proof a proof to check
* @param ch_denom_pub hash of the conflicting denomination
diff --git a/src/lib/exchange_api_reserves_open.c b/src/lib/exchange_api_reserves_open.c
index 64d259ba..2b7ef0d9 100644
--- a/src/lib/exchange_api_reserves_open.c
+++ b/src/lib/exchange_api_reserves_open.c
@@ -27,12 +27,40 @@
#include <gnunet/gnunet_curl_lib.h>
#include "taler_exchange_service.h"
#include "taler_json_lib.h"
+#include "exchange_api_common.h"
#include "exchange_api_handle.h"
#include "taler_signatures.h"
#include "exchange_api_curl_defaults.h"
/**
+ * Information we keep per coin to validate the reply.
+ */
+struct CoinData
+{
+ /**
+ * Public key of the coin.
+ */
+ struct TALER_CoinSpendPublicKeyP coin_pub;
+
+ /**
+ * Signature by the coin.
+ */
+ struct TALER_CoinSpendSignatureP coin_sig;
+
+ /**
+ * The hash of the denomination's public key
+ */
+ struct TALER_DenominationHashP h_denom_pub;
+
+ /**
+ * How much did this coin contribute.
+ */
+ struct TALER_Amount contribution;
+};
+
+
+/**
* @brief A /reserves/$RID/open Handle
*/
struct TALER_EXCHANGE_ReservesOpenHandle
@@ -70,6 +98,16 @@ struct TALER_EXCHANGE_ReservesOpenHandle
void *cb_cls;
/**
+ * Information we keep per coin to validate the reply.
+ */
+ struct CoinData *coins;
+
+ /**
+ * Length of the @e coins array.
+ */
+ unsigned int num_coins;
+
+ /**
* Public key of the reserve we are querying.
*/
struct TALER_ReservePublicKeyP reserve_pub;
@@ -282,12 +320,74 @@ handle_reserves_open_finished (void *cls,
rs.hr.hint = TALER_JSON_get_error_hint (j);
break;
case MHD_HTTP_CONFLICT:
- // FIXME: not yet specified (#7428), but needed in
- // case of double-spending or insufficient
- // reserve balance!
- rs.hr.ec = TALER_JSON_get_error_code (j);
- rs.hr.hint = TALER_JSON_get_error_hint (j);
- break;
+ {
+ const struct TALER_EXCHANGE_Keys *keys;
+ const struct CoinData *cd = NULL;
+ struct TALER_CoinSpendPublicKeyP coin_pub;
+ const struct TALER_EXCHANGE_DenomPublicKey *dk;
+ struct GNUNET_JSON_Specification spec[] = {
+ GNUNET_JSON_spec_fixed_auto ("coin_pub",
+ &coin_pub),
+ GNUNET_JSON_spec_end ()
+ };
+
+ keys = TALER_EXCHANGE_get_keys (roh->exchange);
+ GNUNET_assert (NULL != keys);
+ if (GNUNET_OK !=
+ GNUNET_JSON_parse (j,
+ spec,
+ NULL,
+ NULL))
+ {
+ GNUNET_break_op (0);
+ rs.hr.http_status = 0;
+ rs.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
+ break;
+ }
+ for (unsigned int i = 0; i<roh->num_coins; i++)
+ {
+ const struct CoinData *cdi = &roh->coins[i];
+
+ if (0 == GNUNET_memcmp (&coin_pub,
+ &cdi->coin_pub))
+ {
+ cd = cdi;
+ break;
+ }
+ }
+ if (NULL == cd)
+ {
+ GNUNET_break_op (0);
+ rs.hr.http_status = 0;
+ rs.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
+ break;
+ }
+ dk = TALER_EXCHANGE_get_denomination_key_by_hash (keys,
+ &cd->h_denom_pub);
+ if (NULL == dk)
+ {
+ GNUNET_break_op (0);
+ rs.hr.http_status = 0;
+ rs.hr.ec = TALER_EC_GENERIC_CLIENT_INTERNAL_ERROR;
+ break;
+ }
+ if (GNUNET_OK !=
+ TALER_EXCHANGE_check_coin_conflict_ (keys,
+ j,
+ dk,
+ &coin_pub,
+ &cd->coin_sig,
+ &cd->contribution))
+ {
+ GNUNET_break_op (0);
+ rs.hr.http_status = 0;
+ rs.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
+ break;
+ }
+ rs.hr.ec = TALER_JSON_get_error_code (j);
+ rs.hr.hint = TALER_JSON_get_error_hint (j);
+ break;
+ }
case MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS:
if (GNUNET_OK !=
handle_reserves_open_kyc (roh,
@@ -402,18 +502,21 @@ TALER_EXCHANGE_reserves_open (
min_purses,
reserve_priv,
&roh->reserve_sig);
+ roh->coins = GNUNET_new_array (coin_payments_length,
+ struct CoinData);
cpa = json_array ();
GNUNET_assert (NULL != cpa);
for (unsigned int i = 0; i<coin_payments_length; i++)
{
const struct TALER_EXCHANGE_PurseDeposit *pd = &coin_payments[i];
- struct TALER_CoinSpendSignatureP coin_sig;
- struct TALER_CoinSpendPublicKeyP coin_pub;
const struct TALER_AgeCommitmentProof *acp = pd->age_commitment_proof;
struct TALER_AgeCommitmentHash ahac;
struct TALER_AgeCommitmentHash *achp = NULL;
+ struct CoinData *cd = &roh->coins[i];
json_t *cp;
+ cd->contribution = pd->amount;
+ cd->h_denom_pub = pd->h_denom_pub;
if (NULL != acp)
{
TALER_age_commitment_hash (&acp->commitment,
@@ -423,9 +526,9 @@ TALER_EXCHANGE_reserves_open (
TALER_wallet_reserve_open_deposit_sign (&pd->amount,
&roh->reserve_sig,
&pd->coin_priv,
- &coin_sig);
+ &cd->coin_sig);
GNUNET_CRYPTO_eddsa_key_get_public (&pd->coin_priv.eddsa_priv,
- &coin_pub.eddsa_pub);
+ &cd->coin_pub.eddsa_pub);
cp = GNUNET_JSON_PACK (
GNUNET_JSON_pack_allow_null (
@@ -438,9 +541,9 @@ TALER_EXCHANGE_reserves_open (
TALER_JSON_pack_denom_sig ("ub_sig",
&pd->denom_sig),
GNUNET_JSON_pack_data_auto ("coin_pub",
- &coin_pub),
+ &cd->coin_pub),
GNUNET_JSON_pack_data_auto ("coin_sig",
- &coin_sig));
+ &cd->coin_sig));
GNUNET_assert (0 ==
json_array_append_new (cpa,
cp));
@@ -468,6 +571,7 @@ TALER_EXCHANGE_reserves_open (
GNUNET_break (0);
curl_easy_cleanup (eh);
json_decref (open_obj);
+ GNUNET_free (roh->coins);
GNUNET_free (roh->url);
GNUNET_free (roh);
return NULL;
@@ -494,6 +598,7 @@ TALER_EXCHANGE_reserves_open_cancel (
roh->job = NULL;
}
TALER_curl_easy_post_finished (&roh->post_ctx);
+ GNUNET_free (roh->coins);
GNUNET_free (roh->url);
GNUNET_free (roh);
}
generated by cgit v1.2.3 (git 2.39.1) at 2025-10-27 13:21:28 +0000