This change also removes ‘struct TALER_DepositTrackPS’
from the public API.
* src/include/taler_signatures.h (struct TALER_DepositTrackPS): Delete.
* src/util/exchange_signatures.c (struct TALER_DepositTrackPS): New.
(TALER_exchange_deposit_sign): New func.
(TALER_exchange_deposit_verify): New func.
* src/include/taler_crypto_lib.h
(TALER_exchange_deposit_sign): New func decl.
(TALER_exchange_deposit_verify): New func decl.
* src/exchange/taler-exchange-httpd_deposits_get.c
(TEH_handler_deposits_get): Rework to use ‘TALER_exchange_deposit_verify’.
* src/lib/exchange_api_deposits_get.c
(TALER_EXCHANGE_deposits_get): Rework to use ‘taler_exchange_deposit_sign’.
- Unit-tests for commit, derive, attest and verify added, with multiple
combinations of minimum age and commited age.
- Fixed crypto implementation (eddsa -> ecdsa)
- Using now standard functionality from GNUNET:
GNUNET_CRYPTO_ecdsa_{private,public}_key_derive
All tests pass (unit tests in util/ and 'make check' in testing).
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.
Age restriction works now with withdraw, melt/refresh/reveal and link,
including tests.
However, there is still a problem with the tests: The melting operation
"refresh-melt-failing-age" that should fail (because of conflict), but
currently fails for other reasons. I decided to disable that particular
test (and the next) and submit the patch I have so far.
