kyc_signatures.c (2166B)
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_SignaturePurpose purpose; 39 40 }; 41 42 GNUNET_NETWORK_STRUCT_END 43 44 45 void 46 TALER_account_kyc_auth_sign ( 47 const union TALER_AccountPrivateKeyP *account_priv, 48 union TALER_AccountSignatureP *account_sig) 49 { 50 struct TALER_KycQueryPS aq = { 51 .purpose.purpose = htonl (TALER_SIGNATURE_KYC_AUTH), 52 .purpose.size = htonl (sizeof (aq)) 53 }; 54 55 GNUNET_CRYPTO_eddsa_sign ( 56 &account_priv->reserve_priv.eddsa_priv, 57 &aq, 58 &account_sig->reserve_sig.eddsa_signature); 59 } 60 61 62 enum GNUNET_GenericReturnValue 63 TALER_account_kyc_auth_verify ( 64 const union TALER_AccountPublicKeyP *account_pub, 65 const union TALER_AccountSignatureP *account_sig) 66 { 67 struct TALER_KycQueryPS aq = { 68 .purpose.purpose = htonl (TALER_SIGNATURE_KYC_AUTH), 69 .purpose.size = htonl (sizeof (aq)) 70 }; 71 72 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 */