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consistently distinguish blinded/unblinded denomination sigs

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This commit is contained in:
Christian Grothoff 2021-10-31 18:12:54 +01:00
parent b1197c16a4
commit 783d07b476
No known key found for this signature in database
GPG Key ID: 939E6BE1E29FC3CC
8 changed files with 65 additions and 26 deletions
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2
src/exchange/taler-exchange-httpd_link.c
View File

@ -84,7 +84,7 @@ handle_link_data (void *cls,
obj = GNUNET_JSON_PACK (
TALER_JSON_pack_denom_pub ("denom_pub",
&pos->denom_pub),
TALER_JSON_pack_denom_sig ("ev_sig",
TALER_JSON_pack_blinded_denom_sig ("ev_sig",
&pos->ev_sig),
GNUNET_JSON_pack_data_auto ("link_sig",
&pos->orig_coin_link_sig));

4
src/exchangedb/irbt_callbacks.c
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@ -230,7 +230,7 @@ irbt_cb_table_reserves_out (struct PostgresClosure *pg,
&td->details.reserves_out.h_blind_ev),
GNUNET_PQ_query_param_uint64 (
&td->details.reserves_out.denominations_serial),
TALER_PQ_query_param_denom_sig (
TALER_PQ_query_param_blinded_denom_sig (
&td->details.reserves_out.denom_sig),
GNUNET_PQ_query_param_uint64 (
&td->details.reserves_out.reserve_uuid),
@ -437,7 +437,7 @@ irbt_cb_table_refresh_revealed_coins (
td->details.refresh_revealed_coins.
coin_ev_size),
GNUNET_PQ_query_param_auto_from_type (&h_coin_ev),
TALER_PQ_query_param_denom_sig (
TALER_PQ_query_param_blinded_denom_sig (
&td->details.refresh_revealed_coins.ev_sig),
GNUNET_PQ_query_param_uint64 (
&td->details.refresh_revealed_coins.denominations_serial),

4
src/exchangedb/lrbt_callbacks.c
View File

@ -405,7 +405,7 @@ lrbt_cb_table_reserves_out (void *cls,
GNUNET_PQ_result_spec_uint64 (
"denominations_serial",
&td.details.reserves_out.denominations_serial),
TALER_PQ_result_spec_denom_sig (
TALER_PQ_result_spec_blinded_denom_sig (
"denom_sig",
&td.details.reserves_out.denom_sig),
GNUNET_PQ_result_spec_uint64 (
@ -787,7 +787,7 @@ lrbt_cb_table_refresh_revealed_coins (void *cls,
"coin_ev",
(void **) &td.details.refresh_revealed_coins.coin_ev,
&td.details.refresh_revealed_coins.coin_ev_size),
TALER_PQ_result_spec_denom_sig (
TALER_PQ_result_spec_blinded_denom_sig (
"ev_sig",
&td.details.refresh_revealed_coins.ev_sig),
GNUNET_PQ_result_spec_uint64 (

4
src/exchangedb/plugin_exchangedb_postgres.c
View File

@ -6367,7 +6367,7 @@ free_link_data_list (void *cls,
{
next = ldl->next;
TALER_denom_pub_free (&ldl->denom_pub);
TALER_denom_sig_free (&ldl->ev_sig);
TALER_blinded_denom_sig_free (&ldl->ev_sig);
GNUNET_free (ldl);
ldl = next;
}
@ -6401,7 +6401,7 @@ add_ldl (void *cls,
&transfer_pub),
GNUNET_PQ_result_spec_auto_from_type ("link_sig",
&pos->orig_coin_link_sig),
TALER_PQ_result_spec_denom_sig ("ev_sig",
TALER_PQ_result_spec_blinded_denom_sig ("ev_sig",
&pos->ev_sig),
TALER_PQ_result_spec_denom_pub ("denom_pub",
&pos->denom_pub),

32
src/exchangedb/test_exchangedb.c
View File

@ -262,8 +262,8 @@ create_denom_key_pair (unsigned int size,
TALER_denom_pub_hash (&dkp->pub,
&dki.issue.properties.denom_hash);
dki.issue.properties.purpose.size = htonl (sizeof (struct
TALER_DenominationKeyValidityPS));
dki.issue.properties.purpose.size
= htonl (sizeof (struct TALER_DenominationKeyValidityPS));
dki.issue.properties.purpose.purpose = htonl (
TALER_SIGNATURE_MASTER_DENOMINATION_KEY_VALIDITY);
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT !=
@ -479,7 +479,7 @@ handle_link_data_cb (void *cls,
TALER_denom_pub_cmp (&ldlp->denom_pub,
&new_dkp[cnt]->pub)) &&
(0 ==
TALER_denom_sig_cmp (&ldlp->ev_sig,
TALER_blinded_denom_sig_cmp (&ldlp->ev_sig,
&revealed_coins[cnt].coin_sig)) )
{
found = GNUNET_YES;
@ -623,7 +623,7 @@ test_melting (void)
RND_BLK (&hc);
ccoin->denom_pub = new_dkp[cnt]->pub;
ccoin->coin_sig.cipher = TALER_DENOMINATION_RSA;
ccoin->coin_sig.details.rsa_signature
ccoin->coin_sig.details.blinded_rsa_signature
= GNUNET_CRYPTO_rsa_sign_fdh (new_dkp[cnt]->priv.details.rsa_private_key,
&hc.hash);
}
@ -675,7 +675,7 @@ drop:
{
for (unsigned int cnt = 0; cnt < MELT_NEW_COINS; cnt++)
{
TALER_denom_sig_free (&revealed_coins[cnt].coin_sig);
TALER_blinded_denom_sig_free (&revealed_coins[cnt].coin_sig);
GNUNET_free (revealed_coins[cnt].coin_ev);
}
GNUNET_free (revealed_coins);
@ -1593,7 +1593,7 @@ run (void *cls)
RND_BLK (&cbc.reserve_sig);
cbc.denom_pub_hash = dkp_pub_hash;
cbc.sig.cipher = TALER_DENOMINATION_RSA;
cbc.sig.details.rsa_signature
cbc.sig.details.blinded_rsa_signature
= GNUNET_CRYPTO_rsa_sign_fdh (dkp->priv.details.rsa_private_key,
&cbc.h_coin_envelope.hash);
cbc.reserve_pub = reserve_pub;
@ -1620,12 +1620,14 @@ run (void *cls)
plugin->get_withdraw_info (plugin->cls,
&cbc.h_coin_envelope,
&cbc2));
FAILIF (0 != GNUNET_memcmp (&cbc2.reserve_sig, &cbc.reserve_sig));
FAILIF (0 != GNUNET_memcmp (&cbc2.reserve_pub, &cbc.reserve_pub));
FAILIF (0 != GNUNET_memcmp (&cbc2.reserve_sig,
&cbc.reserve_sig));
FAILIF (0 != GNUNET_memcmp (&cbc2.reserve_pub,
&cbc.reserve_pub));
result = 6;
FAILIF (GNUNET_OK !=
GNUNET_CRYPTO_rsa_verify (&cbc.h_coin_envelope.hash,
cbc2.sig.details.rsa_signature,
cbc2.sig.details.blinded_rsa_signature,
dkp->pub.details.rsa_public_key));
@ -1634,7 +1636,9 @@ run (void *cls)
RND_BLK (&deposit.coin.coin_pub);
TALER_denom_pub_hash (&dkp->pub,
&deposit.coin.denom_pub_hash);
deposit.coin.denom_sig = cbc.sig;
deposit.coin.denom_sig.cipher = TALER_DENOMINATION_RSA;
deposit.coin.denom_sig.details.rsa_signature =
cbc.sig.details.blinded_rsa_signature;
deadline = GNUNET_TIME_absolute_get ();
(void) GNUNET_TIME_round_abs (&deadline);
FAILIF (TALER_EXCHANGEDB_CKS_ADDED !=
@ -1792,7 +1796,9 @@ run (void *cls)
RND_BLK (&deposit.coin.coin_pub);
TALER_denom_pub_hash (&dkp->pub,
&deposit.coin.denom_pub_hash);
deposit.coin.denom_sig = cbc.sig;
deposit.coin.denom_sig.cipher = TALER_DENOMINATION_RSA;
deposit.coin.denom_sig.details.rsa_signature =
cbc.sig.details.blinded_rsa_signature;
RND_BLK (&deposit.csig);
RND_BLK (&deposit.merchant_pub);
RND_BLK (&deposit.h_contract_terms);
@ -2126,8 +2132,8 @@ drop:
plugin->drop_tables (plugin->cls));
if (NULL != dkp)
destroy_denom_key_pair (dkp);
TALER_denom_sig_free (&cbc.sig);
TALER_denom_sig_free (&cbc2.sig);
TALER_blinded_denom_sig_free (&cbc.sig);
TALER_blinded_denom_sig_free (&cbc2.sig);
dkp = NULL;
TALER_EXCHANGEDB_plugin_unload (plugin);
plugin = NULL;

13
src/include/taler_crypto_lib.h
View File

@ -772,6 +772,19 @@ TALER_denom_sig_cmp (const struct TALER_DenominationSignature *sig1,
const struct TALER_DenominationSignature *sig2);
/**
* Compare two blinded denomination signatures.
*
* @param sig1 first signature
* @param sig2 second signature
* @return 0 if the keys are equal, otherwise -1 or 1
*/
int
TALER_blinded_denom_sig_cmp (
const struct TALER_BlindedDenominationSignature *sig1,
const struct TALER_BlindedDenominationSignature *sig2);
/**
* Obtain denomination public key from a denomination private key.
*

6
src/include/taler_exchangedb_plugin.h
View File

@ -239,7 +239,7 @@ struct TALER_EXCHANGEDB_TableData
{
struct TALER_BlindedCoinHash h_blind_ev;
uint64_t denominations_serial;
struct TALER_DenominationSignature denom_sig;
struct TALER_BlindedDenominationSignature denom_sig;
uint64_t reserve_uuid;
struct TALER_ReserveSignatureP reserve_sig;
struct GNUNET_TIME_Absolute execution_date;
@ -301,7 +301,7 @@ struct TALER_EXCHANGEDB_TableData
void *coin_ev;
size_t coin_ev_size;
// h_coin_ev omitted, to be recomputed!
struct TALER_DenominationSignature ev_sig;
struct TALER_BlindedDenominationSignature ev_sig;
} refresh_revealed_coins;
struct
@ -1334,7 +1334,7 @@ struct TALER_EXCHANGEDB_LinkList
/**
* Signature over the blinded envelope.
*/
struct TALER_DenominationSignature ev_sig;
struct TALER_BlindedDenominationSignature ev_sig;
/**
* Signature of the original coin being refreshed over the

20
src/util/denom.c
View File

@ -295,4 +295,24 @@ TALER_denom_sig_cmp (const struct TALER_DenominationSignature *sig1,
}
int
TALER_blinded_denom_sig_cmp (
const struct TALER_BlindedDenominationSignature *sig1,
const struct TALER_BlindedDenominationSignature *sig2)
{
if (sig1->cipher != sig2->cipher)
return (sig1->cipher > sig2->cipher) ? 1 : -1;
switch (sig1->cipher)
{
case TALER_DENOMINATION_RSA:
return GNUNET_CRYPTO_rsa_signature_cmp (sig1->details.blinded_rsa_signature,
sig2->details.blinded_rsa_signature);
// TODO: add case for Clause-Schnorr
default:
GNUNET_assert (0);
}
return -2;
}
/* end of denom.c */