diff options
author | Christian Grothoff <christian@grothoff.org> | 2022-05-07 23:27:56 +0200 |
---|---|---|
committer | Christian Grothoff <christian@grothoff.org> | 2022-05-07 23:27:56 +0200 |
commit | 2d84d7f6ddce69b5c1d4d44a16a9aa0663fd4eba (patch) | |
tree | ee179098d910dc959522cbf78f146f2983a3ee49 /src/util | |
parent | 4199e4438d2dac9b18e1e922dec72723bc6d7c04 (diff) | |
download | exchange-2d84d7f6ddce69b5c1d4d44a16a9aa0663fd4eba.tar.xz |
add function for purse status signing
Diffstat (limited to 'src/util')
-rw-r--r-- | src/util/exchange_signatures.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/util/exchange_signatures.c b/src/util/exchange_signatures.c index d6214ab3e..41f2b61a1 100644 --- a/src/util/exchange_signatures.c +++ b/src/util/exchange_signatures.c @@ -1505,4 +1505,93 @@ TALER_exchange_online_purse_merged_verify ( } +GNUNET_NETWORK_STRUCT_BEGIN + +/** + * @brief Format used to generate the signature on a purse status + * from the exchange. + */ +struct TALER_PurseStatusPS +{ + /** + * Purpose must be #TALER_SIGNATURE_EXCHANGE_PURSE_STATUS. Signed + * by a `struct TALER_ExchangePublicKeyP` using EdDSA. + */ + struct GNUNET_CRYPTO_EccSignaturePurpose purpose; + + /** + * Time when the purse was merged, possibly 'never'. + */ + struct GNUNET_TIME_TimestampNBO merge_timestamp; + + /** + * Time when the purse was deposited last, possibly 'never'. + */ + struct GNUNET_TIME_TimestampNBO deposit_timestamp; + + /** + * Amount deposited in total in the purse without fees. + * May be possibly less than the target amount. + */ + struct TALER_AmountNBO balance; + +}; + +GNUNET_NETWORK_STRUCT_END + + +enum TALER_ErrorCode +TALER_exchange_purse_status_sign ( + TALER_ExchangeSignCallback scb, + struct GNUNET_TIME_Timestamp merge_timestamp, + struct GNUNET_TIME_Timestamp deposit_timestamp, + const struct TALER_Amount *balance, + struct TALER_ExchangePublicKeyP *pub, + struct TALER_ExchangeSignatureP *sig) +{ + struct TALER_PurseStatusPS dcs = { + .purpose.purpose = htonl (TALER_SIGNATURE_EXCHANGE_PURSE_STATUS), + .purpose.size = htonl (sizeof (dcs)), + .merge_timestamp = GNUNET_TIME_timestamp_hton (merge_timestamp), + .deposit_timestamp = GNUNET_TIME_timestamp_hton (deposit_timestamp) + }; + + TALER_amount_hton (&dcs.balance, + balance); + return scb (&dcs.purpose, + pub, + sig); +} + + +enum GNUNET_GenericReturnValue +TALER_exchange_online_purse_status_verify ( + struct GNUNET_TIME_Timestamp merge_timestamp, + struct GNUNET_TIME_Timestamp deposit_timestamp, + const struct TALER_Amount *balance, + const struct TALER_ExchangePublicKeyP *exchange_pub, + const struct TALER_ExchangeSignatureP *exchange_sig) +{ + struct TALER_PurseStatusPS dcs = { + .purpose.purpose = htonl (TALER_SIGNATURE_EXCHANGE_PURSE_STATUS), + .purpose.size = htonl (sizeof (dcs)), + .merge_timestamp = GNUNET_TIME_timestamp_hton (merge_timestamp), + .deposit_timestamp = GNUNET_TIME_timestamp_hton (deposit_timestamp) + }; + + TALER_amount_hton (&dcs.balance, + balance); + if (GNUNET_OK != + GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_EXCHANGE_PURSE_STATUS, + &dcs, + &exchange_sig->eddsa_signature, + &exchange_pub->eddsa_pub)) + { + GNUNET_break_op (0); + return GNUNET_SYSERR; + } + return GNUNET_OK; +} + + /* end of exchange_signatures.c */ |