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author | Christian Grothoff <christian@grothoff.org> | 2022-09-18 17:36:35 +0200 |
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committer | Christian Grothoff <christian@grothoff.org> | 2022-09-18 17:36:35 +0200 |
commit | 18a2fae3b594f7ef54104b708d00641f6ed5de1e (patch) | |
tree | e70dff8fb8bab32838c5b6d1da04eb31abf6e46e /src/util/exchange_signatures.c | |
parent | b4b857abeaa0447b8dd4626f303ce7cdb728f0b7 (diff) | |
download | exchange-18a2fae3b594f7ef54104b708d00641f6ed5de1e.tar.xz |
add new signature functions for DD31
Diffstat (limited to 'src/util/exchange_signatures.c')
-rw-r--r-- | src/util/exchange_signatures.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/util/exchange_signatures.c b/src/util/exchange_signatures.c index 52919d2e9..d42f70d66 100644 --- a/src/util/exchange_signatures.c +++ b/src/util/exchange_signatures.c @@ -1591,4 +1591,103 @@ TALER_exchange_online_purse_status_verify ( } +GNUNET_NETWORK_STRUCT_BEGIN + +/** + * Message signed by the exchange to affirm that the + * owner of a reserve has certain attributes. + */ +struct TALER_ExchangeAttestPS +{ + + /** + * Purpose is #TALER_SIGNATURE_EXCHANGE_RESERVE_ATTEST_DETAILS + */ + struct GNUNET_CRYPTO_EccSignaturePurpose purpose; + + /** + * Time when the attestation was made. + */ + struct GNUNET_TIME_TimestampNBO attest_timestamp; + + /** + * Time when the attestation expires. + */ + struct GNUNET_TIME_TimestampNBO expiration_time; + + /** + * Public key of the reserve for which the attributes + * are attested. + */ + struct TALER_ReservePublicKeyP reserve_pub; + + /** + * Hash over the attributes. + */ + struct GNUNET_HashCode h_attributes; + +}; + +GNUNET_NETWORK_STRUCT_END + + +enum TALER_ErrorCode +TALER_exchange_online_reserve_attest_details_sign ( + TALER_ExchangeSignCallback scb, + struct GNUNET_TIME_Timestamp attest_timestamp, + struct GNUNET_TIME_Timestamp expiration_time, + const struct TALER_ReservePublicKeyP *reserve_pub, + const json_t *attributes, + struct TALER_ExchangePublicKeyP *pub, + struct TALER_ExchangeSignatureP *sig) +{ + struct TALER_ExchangeAttestPS rap = { + .purpose.size = htonl (sizeof (rap)), + .purpose.purpose = htonl (TALER_SIGNATURE_EXCHANGE_RESERVE_ATTEST_DETAILS), + .attest_timestamp = GNUNET_TIME_timestamp_hton (attest_timestamp), + .expiration_time = GNUNET_TIME_timestamp_hton (expiration_time), + .reserve_pub = *reserve_pub + }; + + TALER_json_hash (attributes, + &rap.h_attributes); + return scb (&rap.purpose, + pub, + sig); +} + + +enum GNUNET_GenericReturnValue +TALER_exchange_online_reserve_attest_details_verify ( + struct GNUNET_TIME_Timestamp attest_timestamp, + struct GNUNET_TIME_Timestamp expiration_time, + const struct TALER_ReservePublicKeyP *reserve_pub, + const json_t *attributes, + struct TALER_ExchangePublicKeyP *pub, + struct TALER_ExchangeSignatureP *sig) +{ + struct TALER_ExchangeAttestPS rap = { + .purpose.size = htonl (sizeof (rap)), + .purpose.purpose = htonl (TALER_SIGNATURE_EXCHANGE_RESERVE_ATTEST_DETAILS), + .attest_timestamp = GNUNET_TIME_timestamp_hton (attest_timestamp), + .expiration_time = GNUNET_TIME_timestamp_hton (expiration_time), + .reserve_pub = *reserve_pub + }; + + TALER_json_hash (attributes, + &rap.h_attributes); + if (GNUNET_OK != + GNUNET_CRYPTO_eddsa_verify ( + TALER_SIGNATURE_EXCHANGE_RESERVE_ATTEST_DETAILS, + &rap, + &sig->eddsa_signature, + &pub->eddsa_pub)) + { + GNUNET_break_op (0); + return GNUNET_SYSERR; + } + return GNUNET_OK; +} + + /* end of exchange_signatures.c */ |