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-rw-r--r--src/util/denom.c175
1 files changed, 141 insertions, 34 deletions
diff --git a/src/util/denom.c b/src/util/denom.c
index 68ad04f39..ee488192b 100644
--- a/src/util/denom.c
+++ b/src/util/denom.c
@@ -83,28 +83,6 @@ TALER_denom_priv_create (struct TALER_DenominationPrivateKey *denom_priv,
enum GNUNET_GenericReturnValue
-TALER_denom_cs_derive_r_public (const struct TALER_CsNonce *nonce,
- const struct
- TALER_DenominationPrivateKey *denom_priv,
- struct TALER_DenominationCSPublicRPairP *r_pub)
-{
- if (denom_priv->cipher != TALER_DENOMINATION_CS)
- {
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
-
- struct GNUNET_CRYPTO_CsRSecret r[2];
- GNUNET_CRYPTO_cs_r_derive (&nonce->nonce,
- &denom_priv->details.cs_private_key,
- r);
- GNUNET_CRYPTO_cs_r_get_public (&r[0], &r_pub->r_pub[0]);
- GNUNET_CRYPTO_cs_r_get_public (&r[1], &r_pub->r_pub[1]);
- return GNUNET_OK;
-}
-
-
-enum GNUNET_GenericReturnValue
TALER_denom_sign_blinded (struct TALER_BlindedDenominationSignature *denom_sig,
const struct TALER_DenominationPrivateKey *denom_priv,
const struct TALER_BlindedPlanchet *blinded_planchet)
@@ -112,13 +90,11 @@ TALER_denom_sign_blinded (struct TALER_BlindedDenominationSignature *denom_sig,
memset (denom_sig,
0,
sizeof (*denom_sig));
-
if (blinded_planchet->cipher != denom_priv->cipher)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
-
switch (denom_priv->cipher)
{
case TALER_DENOMINATION_INVALID:
@@ -140,11 +116,11 @@ TALER_denom_sign_blinded (struct TALER_BlindedDenominationSignature *denom_sig,
case TALER_DENOMINATION_CS:
{
struct GNUNET_CRYPTO_CsRSecret r[2];
+
GNUNET_CRYPTO_cs_r_derive (
&blinded_planchet->details.cs_blinded_planchet.nonce.nonce,
&denom_priv->details.cs_private_key,
r);
-
denom_sig->details.blinded_cs_answer.b =
GNUNET_CRYPTO_cs_sign_derive (&denom_priv->details.cs_private_key,
r,
@@ -154,7 +130,6 @@ TALER_denom_sign_blinded (struct TALER_BlindedDenominationSignature *denom_sig,
cs_blinded_planchet.nonce.nonce,
&denom_sig->details.blinded_cs_answer.
s_scalar);
-
denom_sig->cipher = TALER_DENOMINATION_CS;
}
return GNUNET_OK;
@@ -268,8 +243,8 @@ TALER_denom_pub_hash (const struct TALER_DenominationPublicKey *denom_pub,
htonl (denom_pub->age_mask.mask),
htonl ((uint32_t) denom_pub->cipher)
};
-
struct GNUNET_HashContext *hc;
+
hc = GNUNET_CRYPTO_hash_context_start ();
GNUNET_CRYPTO_hash_context_read (hc,
opt,
@@ -444,7 +419,6 @@ TALER_denom_pub_free (struct TALER_DenominationPublicKey *denom_pub)
denom_pub->cipher = TALER_DENOMINATION_INVALID;
return;
case TALER_DENOMINATION_CS:
- // ATM nothing needs to be freed, but check again after implementation.
return;
default:
GNUNET_assert (0);
@@ -468,7 +442,6 @@ TALER_denom_priv_free (struct TALER_DenominationPrivateKey *denom_priv)
denom_priv->cipher = TALER_DENOMINATION_INVALID;
return;
case TALER_DENOMINATION_CS:
- // ATM nothing needs to be freed, but check again after implementation.
return;
default:
GNUNET_assert (0);
@@ -492,7 +465,6 @@ TALER_denom_sig_free (struct TALER_DenominationSignature *denom_sig)
denom_sig->cipher = TALER_DENOMINATION_INVALID;
return;
case TALER_DENOMINATION_CS:
- // ATM nothing needs to be freed, but check again after implementation.
return;
default:
GNUNET_assert (0);
@@ -518,7 +490,6 @@ TALER_blinded_denom_sig_free (
denom_sig->cipher = TALER_DENOMINATION_INVALID;
return;
case TALER_DENOMINATION_CS:
- // ATM nothing needs to be freed, but check again after implementation.
return;
default:
GNUNET_assert (0);
@@ -546,7 +517,6 @@ TALER_denom_pub_deep_copy (struct TALER_DenominationPublicKey *denom_dst,
denom_src->details.rsa_public_key);
return;
case TALER_DENOMINATION_CS:
- // In Case of CS, the above is already a deep copy *denom_dst = *denom_src;
return;
default:
GNUNET_assert (0);
@@ -569,7 +539,6 @@ TALER_denom_sig_deep_copy (struct TALER_DenominationSignature *denom_dst,
denom_src->details.rsa_signature);
return;
case TALER_DENOMINATION_CS:
- // In Case of CS, the above is already a deep copy *denom_dst = *denom_src;
return;
default:
GNUNET_assert (0);
@@ -593,7 +562,6 @@ TALER_blinded_denom_sig_deep_copy (
denom_src->details.blinded_rsa_signature);
return;
case TALER_DENOMINATION_CS:
- // In Case of CS, the above is already a deep copy *denom_dst = *denom_src;
return;
default:
GNUNET_assert (0);
@@ -734,4 +702,143 @@ TALER_blinded_planchet_hash (const struct TALER_BlindedPlanchet *bp,
}
+void
+TALER_planchet_blinding_secret_create (
+ const struct TALER_PlanchetMasterSecretP *ps,
+ const struct TALER_ExchangeWithdrawValues *alg_values,
+ union TALER_DenominationBlindingKeyP *bks)
+{
+ switch (alg_values->cipher)
+ {
+ case TALER_DENOMINATION_INVALID:
+ GNUNET_break (0);
+ return;
+ case TALER_DENOMINATION_RSA:
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CRYPTO_kdf (&bks->rsa_bks,
+ sizeof (bks->rsa_bks),
+ "bks",
+ strlen ("bks"),
+ ps,
+ sizeof(*ps),
+ NULL,
+ 0));
+ return;
+ case TALER_DENOMINATION_CS:
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CRYPTO_kdf (&bks->nonce,
+ sizeof (bks->nonce),
+ "bseed",
+ strlen ("bseed"),
+ ps,
+ sizeof(*ps),
+ &alg_values->details.cs_values,
+ sizeof(alg_values->details.cs_values),
+ NULL,
+ 0));
+ return;
+ default:
+ GNUNET_break (0);
+ }
+}
+
+
+void
+TALER_planchet_setup_coin_priv (
+ const struct TALER_PlanchetMasterSecretP *ps,
+ const struct TALER_ExchangeWithdrawValues *alg_values,
+ struct TALER_CoinSpendPrivateKeyP *coin_priv)
+{
+ switch (alg_values->cipher)
+ {
+ case TALER_DENOMINATION_RSA:
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CRYPTO_kdf (coin_priv,
+ sizeof (*coin_priv),
+ "coin",
+ strlen ("coin"),
+ ps,
+ sizeof(*ps),
+ NULL,
+ 0));
+ break;
+ case TALER_DENOMINATION_CS:
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CRYPTO_kdf (coin_priv,
+ sizeof (*coin_priv),
+ "coin",
+ strlen ("coin"),
+ ps,
+ sizeof(*ps),
+ &alg_values->details.cs_values,
+ sizeof(alg_values->details.cs_values),
+ NULL,
+ 0));
+ break;
+ default:
+ GNUNET_break (0);
+ return;
+ }
+ coin_priv->eddsa_priv.d[0] &= 248;
+ coin_priv->eddsa_priv.d[31] &= 127;
+ coin_priv->eddsa_priv.d[31] |= 64;
+}
+
+
+void
+TALER_blinded_planchet_free (struct TALER_BlindedPlanchet *blinded_planchet)
+{
+ switch (blinded_planchet->cipher)
+ {
+ case TALER_DENOMINATION_RSA:
+ GNUNET_free (blinded_planchet->details.rsa_blinded_planchet.blinded_msg);
+ break;
+ case TALER_DENOMINATION_CS:
+ memset (blinded_planchet,
+ 0,
+ sizeof (*blinded_planchet));
+ /* nothing to do for CS */
+ break;
+ default:
+ GNUNET_break (0);
+ }
+}
+
+
+enum GNUNET_GenericReturnValue
+TALER_coin_ev_hash (const struct TALER_BlindedPlanchet *blinded_planchet,
+ const struct TALER_DenominationHash *denom_hash,
+ struct TALER_BlindedCoinHash *bch)
+{
+ struct GNUNET_HashContext *hash_context;
+
+ hash_context = GNUNET_CRYPTO_hash_context_start ();
+ GNUNET_CRYPTO_hash_context_read (hash_context,
+ denom_hash,
+ sizeof(*denom_hash));
+ switch (blinded_planchet->cipher)
+ {
+ case TALER_DENOMINATION_RSA:
+ GNUNET_CRYPTO_hash_context_read (
+ hash_context,
+ blinded_planchet->details.rsa_blinded_planchet.blinded_msg,
+ blinded_planchet->details.rsa_blinded_planchet.blinded_msg_size);
+ break;
+ case TALER_DENOMINATION_CS:
+ GNUNET_CRYPTO_hash_context_read (
+ hash_context,
+ &blinded_planchet->details.cs_blinded_planchet.c[0],
+ sizeof (struct GNUNET_CRYPTO_CsC) * 2);
+ break;
+ default:
+ GNUNET_break (0);
+ GNUNET_CRYPTO_hash_context_abort (hash_context);
+ return GNUNET_SYSERR;
+ }
+ GNUNET_CRYPTO_hash_context_finish (hash_context,
+ &bch->hash);
+ return GNUNET_OK;
+}
+
+
/* end of denom.c */
generated by cgit v1.2.3 (git 2.26.2) at 2024-08-24 00:11:05 +0000