From e9eb00e285c80f63cfc08fdd9ea6707d55162e60 Mon Sep 17 00:00:00 2001 From: Özgür Kesim Date: Tue, 1 Mar 2022 17:02:37 +0100 Subject: Refactoring TALER_AgeCommitment Instead of a single struct TALER_AgeCommitment, we now use 1. TALER_AgeCommitment for the age mask and list public keys for age restriciton. 2. TALER_AgeProof for list of private keys for age restriction 3. TALER_AgeCommitmentProof for the aggregation of the former two. Also, we introduce TALER_AgeAttestation as the EDDSA signature to attest a particular age group, along with the function prototypes TALER_age_commitment_attest and TALER_age_commitment_verify. --- src/lib/exchange_api_link.c | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-) (limited to 'src/lib/exchange_api_link.c') diff --git a/src/lib/exchange_api_link.c b/src/lib/exchange_api_link.c index fdb34f075..5840cac63 100644 --- a/src/lib/exchange_api_link.c +++ b/src/lib/exchange_api_link.c @@ -67,10 +67,10 @@ struct TALER_EXCHANGE_LinkHandle struct TALER_CoinSpendPrivateKeyP coin_priv; /** - * Age commitment of the original coin, might be NULL. - * Required to derive the new age commitment + * Age commitment and proof of the original coin, might be NULL. + * Required to derive the new age commitment and proof. */ - const struct TALER_AgeCommitment *age_commitment; + const struct TALER_AgeCommitmentProof *age_commitment_proof; }; @@ -143,25 +143,25 @@ parse_link_coin (const struct TALER_EXCHANGE_LinkHandle *lh, &alg_values, &bks); - lci->age_commitment = NULL; + lci->age_commitment_proof = NULL; lci->h_age_commitment = NULL; /* Derive the age commitment and calculate the hash */ - if (NULL != lh->age_commitment) + if (NULL != lh->age_commitment_proof) { uint64_t seed = (uint64_t) secret.key.bits[0] | (uint64_t) secret.key.bits[1] << 32; - lci->age_commitment = GNUNET_new (struct TALER_AgeCommitment); + lci->age_commitment_proof = GNUNET_new (struct TALER_AgeCommitmentProof); lci->h_age_commitment = GNUNET_new (struct TALER_AgeCommitmentHash); GNUNET_assert (GNUNET_OK == TALER_age_commitment_derive ( - lh->age_commitment, + lh->age_commitment_proof, seed, - lci->age_commitment)); + lci->age_commitment_proof)); TALER_age_commitment_hash ( - lci->age_commitment, + &(lci->age_commitment_proof->commitment), lci->h_age_commitment); } @@ -471,7 +471,8 @@ handle_link_finished (void *cls, struct TALER_EXCHANGE_LinkHandle * TALER_EXCHANGE_link (struct TALER_EXCHANGE_Handle *exchange, const struct TALER_CoinSpendPrivateKeyP *coin_priv, - const struct TALER_AgeCommitment *age_commitment, + const struct + TALER_AgeCommitmentProof *age_commitment_proof, TALER_EXCHANGE_LinkCallback link_cb, void *link_cb_cls) { @@ -510,7 +511,7 @@ TALER_EXCHANGE_link (struct TALER_EXCHANGE_Handle *exchange, lh->link_cb = link_cb; lh->link_cb_cls = link_cb_cls; lh->coin_priv = *coin_priv; - lh->age_commitment = age_commitment; + lh->age_commitment_proof = age_commitment_proof; lh->url = TEAH_path_to_url (exchange, arg_str); if (NULL == lh->url) -- cgit v1.2.3