Line data    Source code

       1             : /*
       2             :   This file is part of TALER
       3             :   Copyright (C) 2024 Taler Systems SA
       4             : 
       5             :   TALER is free software; you can redistribute it and/or modify it under the
       6             :   terms of the GNU General Public License as published by the Free Software
       7             :   Foundation; either version 3, or (at your option) any later version.
       8             : 
       9             :   TALER is distributed in the hope that it will be useful, but WITHOUT ANY
      10             :   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
      11             :   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
      12             : 
      13             :   You should have received a copy of the GNU General Public License along with
      14             :   TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
      15             : */
      16             : /**
      17             :  * @file kyc_signatures.c
      18             :  * @brief Utility functions for KYC account holders
      19             :  * @author Christian Grothoff
      20             :  */
      21             : #include "taler/platform.h"
      22             : #include "taler/taler_util.h"
      23             : #include "taler/taler_signatures.h"
      24             : 
      25             : 
      26             : GNUNET_NETWORK_STRUCT_BEGIN
      27             : 
      28             : /**
      29             :  * @brief Format used to generate the signature on a
      30             :  * KYC authorization.
      31             :  */
      32             : struct TALER_KycQueryPS
      33             : {
      34             :   /**
      35             :    * Purpose must be #TALER_SIGNATURE_KYC_AUTH.
      36             :    * Used for an EdDSA signature with the `union TALER_AccountPublicKeyP`.
      37             :    */
      38             :   struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
      39             : 
      40             : };
      41             : 
      42             : GNUNET_NETWORK_STRUCT_END
      43             : 
      44             : 
      45             : void
      46          16 : TALER_account_kyc_auth_sign (
      47             :   const union TALER_AccountPrivateKeyP *account_priv,
      48             :   union TALER_AccountSignatureP *account_sig)
      49             : {
      50          16 :   struct TALER_KycQueryPS aq = {
      51          16 :     .purpose.purpose = htonl (TALER_SIGNATURE_KYC_AUTH),
      52          16 :     .purpose.size = htonl (sizeof (aq))
      53             :   };
      54             : 
      55          16 :   GNUNET_CRYPTO_eddsa_sign (
      56             :     &account_priv->reserve_priv.eddsa_priv,
      57             :     &aq,
      58             :     &account_sig->reserve_sig.eddsa_signature);
      59          16 : }
      60             : 
      61             : 
      62             : enum GNUNET_GenericReturnValue
      63          14 : TALER_account_kyc_auth_verify (
      64             :   const union TALER_AccountPublicKeyP *account_pub,
      65             :   const union TALER_AccountSignatureP *account_sig)
      66             : {
      67          14 :   struct TALER_KycQueryPS aq = {
      68          14 :     .purpose.purpose = htonl (TALER_SIGNATURE_KYC_AUTH),
      69          14 :     .purpose.size = htonl (sizeof (aq))
      70             :   };
      71             : 
      72          14 :   return GNUNET_CRYPTO_eddsa_verify (
      73             :     TALER_SIGNATURE_KYC_AUTH,
      74             :     &aq,
      75             :     &account_sig->reserve_sig.eddsa_signature,
      76             :     &account_pub->reserve_pub.eddsa_pub);
      77             : }
      78             : 
      79             : 
      80             : /* end of kyc_signatures.c */