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/*
This file is part of TALER
(C) 2015, 2020, 2021 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file util/test_crypto.c
* @brief Tests for Taler-specific crypto logic
* @author Christian Grothoff <christian@grothoff.org>
*/
#include "platform.h"
#include "taler_util.h"
#include "taler_crypto_lib.h"
/**
* Test high-level link encryption/decryption API.
*
* @return 0 on success
*/
static int
test_high_level (void)
{
struct TALER_CoinSpendPrivateKeyP coin_priv;
struct TALER_CoinSpendPublicKeyP coin_pub;
struct TALER_TransferPrivateKeyP trans_priv;
struct TALER_TransferPublicKeyP trans_pub;
struct TALER_TransferSecretP secret;
struct TALER_TransferSecretP secret2;
struct TALER_PlanchetSecretsP fc1;
struct TALER_PlanchetSecretsP fc2;
GNUNET_CRYPTO_eddsa_key_create (&coin_priv.eddsa_priv);
GNUNET_CRYPTO_eddsa_key_get_public (&coin_priv.eddsa_priv,
&coin_pub.eddsa_pub);
GNUNET_CRYPTO_ecdhe_key_create (&trans_priv.ecdhe_priv);
GNUNET_CRYPTO_ecdhe_key_get_public (&trans_priv.ecdhe_priv,
&trans_pub.ecdhe_pub);
TALER_link_derive_transfer_secret (&coin_priv,
&trans_priv,
&secret);
TALER_link_reveal_transfer_secret (&trans_priv,
&coin_pub,
&secret2);
GNUNET_assert (0 ==
GNUNET_memcmp (&secret,
&secret2));
TALER_link_recover_transfer_secret (&trans_pub,
&coin_priv,
&secret2);
GNUNET_assert (0 ==
GNUNET_memcmp (&secret,
&secret2));
TALER_planchet_setup_refresh (&secret,
0,
&fc1);
TALER_planchet_setup_refresh (&secret,
1,
&fc2);
GNUNET_assert (0 !=
GNUNET_memcmp (&fc1,
&fc2));
return 0;
}
/**
* Test the basic planchet functionality of creating a fresh planchet
* and extracting the respective signature.
*
* @return 0 on success
*/
static int
test_planchets_rsa (void)
{
struct TALER_PlanchetSecretsP ps;
struct TALER_DenominationPrivateKey dk_priv;
struct TALER_DenominationPublicKey dk_pub;
struct TALER_PlanchetDetail pd;
struct TALER_BlindedDenominationSignature blind_sig;
struct TALER_FreshCoin coin;
struct TALER_CoinPubHash c_hash;
GNUNET_assert (GNUNET_SYSERR ==
TALER_denom_priv_create (&dk_priv,
&dk_pub,
TALER_DENOMINATION_INVALID));
GNUNET_assert (GNUNET_SYSERR ==
TALER_denom_priv_create (&dk_priv,
&dk_pub,
42));
GNUNET_assert (GNUNET_OK ==
TALER_denom_priv_create (&dk_priv,
&dk_pub,
TALER_DENOMINATION_RSA,
1024));
TALER_planchet_setup_random (&ps, TALER_DENOMINATION_RSA);
GNUNET_assert (GNUNET_OK ==
TALER_planchet_prepare (&dk_pub,
&ps,
&c_hash,
&pd));
GNUNET_assert (GNUNET_OK ==
TALER_denom_sign_blinded (&blind_sig,
&dk_priv,
&pd.blinded_planchet));
GNUNET_assert (GNUNET_OK ==
TALER_planchet_to_coin (&dk_pub,
&blind_sig,
&ps,
&c_hash,
&coin));
TALER_blinded_denom_sig_free (&blind_sig);
TALER_denom_sig_free (&coin.sig);
TALER_denom_priv_free (&dk_priv);
TALER_denom_pub_free (&dk_pub);
return 0;
}
/**
* Test the basic planchet functionality of creating a fresh planchet with CS denomination
* and extracting the respective signature.
*
* @return 0 on success
*/
static int
test_planchets_cs (void)
{
struct TALER_PlanchetSecretsP ps;
struct TALER_DenominationPrivateKey dk_priv;
struct TALER_DenominationPublicKey dk_pub;
struct TALER_PlanchetDetail pd;
struct TALER_CoinPubHash c_hash;
struct TALER_WithdrawNonce nonce;
struct TALER_DenominationCsPublicR r_pub;
struct TALER_DenominationCsPublicR r_pub_blind;
struct TALER_BlindedDenominationSignature blind_sig;
struct TALER_FreshCoin coin;
GNUNET_assert (GNUNET_OK ==
TALER_denom_priv_create (&dk_priv,
&dk_pub,
TALER_DENOMINATION_CS));
TALER_planchet_setup_random (&ps, TALER_DENOMINATION_CS);
TALER_cs_withdraw_nonce_derive (&ps.coin_priv, &nonce);
GNUNET_assert (GNUNET_OK ==
TALER_denom_cs_derive_r_public (&nonce,
&dk_priv,
&r_pub));
TALER_blinding_secret_create (&ps.blinding_key,
TALER_DENOMINATION_CS,
&ps.coin_priv,
&r_pub);
GNUNET_assert (GNUNET_OK ==
TALER_planchet_prepare (&dk_pub,
&ps,
&c_hash,
&pd,
&r_pub,
&r_pub_blind));
GNUNET_assert (GNUNET_OK ==
TALER_denom_sign_blinded (&blind_sig,
&dk_priv,
&pd.blinded_planchet,
&nonce));
GNUNET_assert (GNUNET_OK ==
TALER_planchet_to_coin (&dk_pub,
&blind_sig,
&ps,
&c_hash,
&coin,
&r_pub_blind));
TALER_blinded_denom_sig_free (&blind_sig);
TALER_denom_sig_free (&coin.sig);
TALER_denom_priv_free (&dk_priv);
TALER_denom_pub_free (&dk_pub);
return 0;
}
/**
* Test the basic planchet functionality of creating a fresh planchet
* and extracting the respective signature.
* Calls test_planchets_rsa and test_planchets_cs
*
* @return 0 on success
*/
static int
test_planchets (void)
{
if (0 != test_planchets_rsa ())
return -1;
return test_planchets_cs ();
}
static int
test_exchange_sigs (void)
{
const char *pt = "payto://x-taler-bank/localhost/Account";
struct TALER_MasterPrivateKeyP priv;
struct TALER_MasterPublicKeyP pub;
struct TALER_MasterSignatureP sig;
GNUNET_CRYPTO_eddsa_key_create (&priv.eddsa_priv);
TALER_exchange_wire_signature_make (pt,
&priv,
&sig);
GNUNET_CRYPTO_eddsa_key_get_public (&priv.eddsa_priv,
&pub.eddsa_pub);
if (GNUNET_OK !=
TALER_exchange_wire_signature_check (pt,
&pub,
&sig))
{
GNUNET_break (0);
return 1;
}
if (GNUNET_OK ==
TALER_exchange_wire_signature_check (
"payto://x-taler-bank/localhost/Other",
&pub,
&sig))
{
GNUNET_break (0);
return 1;
}
return 0;
}
static int
test_merchant_sigs (void)
{
const char *pt = "payto://x-taler-bank/localhost/Account";
struct TALER_WireSalt salt;
struct TALER_MerchantPrivateKeyP priv;
struct TALER_MerchantPublicKeyP pub;
struct TALER_MerchantSignatureP sig;
GNUNET_CRYPTO_eddsa_key_create (&priv.eddsa_priv);
memset (&salt,
42,
sizeof (salt));
TALER_merchant_wire_signature_make (pt,
&salt,
&priv,
&sig);
GNUNET_CRYPTO_eddsa_key_get_public (&priv.eddsa_priv,
&pub.eddsa_pub);
if (GNUNET_OK !=
TALER_merchant_wire_signature_check (pt,
&salt,
&pub,
&sig))
{
GNUNET_break (0);
return 1;
}
if (GNUNET_OK ==
TALER_merchant_wire_signature_check (
"payto://x-taler-bank/localhost/Other",
&salt,
&pub,
&sig))
{
GNUNET_break (0);
return 1;
}
memset (&salt,
43,
sizeof (salt));
if (GNUNET_OK ==
TALER_merchant_wire_signature_check (pt,
&salt,
&pub,
&sig))
{
GNUNET_break (0);
return 1;
}
return 0;
}
int
main (int argc,
const char *const argv[])
{
(void) argc;
(void) argv;
if (0 != test_high_level ())
return 1;
if (0 != test_planchets ())
return 2;
if (0 != test_exchange_sigs ())
return 3;
if (0 != test_merchant_sigs ())
return 4;
return 0;
}
/* end of test_crypto.c */
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