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towards implemnting TALER_MINT_refresh_prepare

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This commit is contained in:
Christian Grothoff 2015-08-08 15:35:34 +02:00
parent 0ad7967328
commit 669e3fcdf2
1 changed files with 70 additions and 1 deletions
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71
src/mint-lib/mint_api_refresh.c
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@ -787,6 +787,31 @@ deserialize_melt_data (const char *buf,
}
/**
* Setup information for a fresh coin.
*
* @param[out] fc value to initialize
* @param pk denomination information for the fresh coin
*/
static void
setup_fresh_coin (struct FreshCoin *fc,
const struct TALER_MINT_DenomPublicKey *pk)
{
struct GNUNET_CRYPTO_EddsaPrivateKey *epk;
unsigned int len;
epk = GNUNET_CRYPTO_eddsa_key_create ();
fc->coin_priv.eddsa_priv = *epk;
GNUNET_free (epk);
GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_STRONG,
&fc->link_secret,
sizeof (struct TALER_LinkSecretP));
len = GNUNET_CRYPTO_rsa_public_key_len (pk->key.rsa_public_key);
fc->blinding_key.rsa_blinding_key
= GNUNET_CRYPTO_rsa_blinding_key_create (len);
}
/**
* Melt (partially spent) coins to obtain fresh coins that are
* unlinkable to the original coin(s). Note that melting more
@ -842,9 +867,53 @@ TALER_MINT_refresh_prepare (unsigned int num_melts,
{
struct MeltData md;
char *buf;
unsigned int i;
unsigned int j;
for (i=0;i<TALER_CNC_KAPPA;i++)
GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_STRONG,
&md.transfer_secrets[i],
sizeof (struct TALER_TransferSecretP));
md.num_melted_coins = num_melts;
md.num_fresh_coins = fresh_pks_len;
md.melted_coins = GNUNET_new_array (num_melts,
struct MeltedCoin);
for (i=0;i<num_melts;i++)
{
md.melted_coins[i].coin_priv = melt_privs[i];
md.melted_coins[i].melt_amount_with_fee = melt_amounts[i];
md.melted_coins[i].fee_withdraw = melt_pks[i].fee_withdraw;
for (j=0;j<TALER_CNC_KAPPA;j++)
{
struct GNUNET_CRYPTO_EcdhePrivateKey *tpk;
tpk = GNUNET_CRYPTO_ecdhe_key_create ();
md.melted_coins[i].transfer_priv[j].ecdhe_priv = *tpk;
GNUNET_free (tpk);
}
md.melted_coins[i].deposit_valid_until
= melt_pks[i].deposit_valid_until;
md.melted_coins[i].pub_key.rsa_public_key
= GNUNET_CRYPTO_rsa_public_key_dup (melt_pks[i].key.rsa_public_key);
md.melted_coins[i].sig.rsa_signature
= GNUNET_CRYPTO_rsa_signature_dup (melt_sigs[i].rsa_signature);
}
md.fresh_pks = GNUNET_new_array (fresh_pks_len,
struct TALER_DenominationPublicKey);
for (i=0;i<fresh_pks_len;i++)
md.fresh_pks[i].rsa_public_key
= GNUNET_CRYPTO_rsa_public_key_dup (fresh_pks[i].key.rsa_public_key);
for (i=0;i<TALER_CNC_KAPPA;i++)
{
md.fresh_coins[i] = GNUNET_new_array (fresh_pks_len,
struct FreshCoin);
for (j=0;j<fresh_pks_len;j++)
setup_fresh_coin (&md.fresh_coins[i][j],
&fresh_pks[j]);
}
// FIXME: compute melt_session_hash!
GNUNET_break (0); // FIXME: not implemented
// FIXME: init 'md' here!
buf = serialize_melt_data (&md,
res_size);