diff options
Diffstat (limited to 'src/util/wallet_signatures.c')
-rw-r--r-- | src/util/wallet_signatures.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/util/wallet_signatures.c b/src/util/wallet_signatures.c index 756856d2a..4b2ddb6cd 100644 --- a/src/util/wallet_signatures.c +++ b/src/util/wallet_signatures.c @@ -1177,4 +1177,85 @@ TALER_wallet_account_close_verify ( } +/** + * Message signed by purse to associate an encrypted contract. + */ +struct TALER_PurseContractPS +{ + + /** + * Purpose is #TALER_SIGNATURE_WALLET_PURSE_ECONTRACT + */ + struct GNUNET_CRYPTO_EccSignaturePurpose purpose; + + /** + * Hash over the encrypted contract. + */ + struct GNUNET_HashCode h_econtract; + + /** + * Public key to decrypt the contract. + */ + struct TALER_ContractDiffiePublicP contract_pub; +}; + + +void +TALER_wallet_econtract_upload_sign ( + const void *econtract, + size_t econtract_size, + const struct TALER_ContractDiffiePublicP *contract_pub, + const struct TALER_PurseContractPrivateKeyP *purse_priv, + struct TALER_PurseContractSignatureP *purse_sig) +{ + struct TALER_PurseContractPS pc = { + .purpose.size = htonl (sizeof (pc)), + .purpose.purpose = htonl (TALER_SIGNATURE_WALLET_PURSE_ECONTRACT), + .contract_pub = *contract_pub + }; + + GNUNET_CRYPTO_hash (econtract, + econtract_size, + &pc.h_econtract); + GNUNET_assert (GNUNET_OK == + GNUNET_CRYPTO_eddsa_sign_ (&purse_priv->eddsa_priv, + &pc.purpose, + &purse_sig->eddsa_signature)); +} + + +/** + * Verify a signature over encrypted contract. + * + * @param econtract encrypted contract + * @param econtract_size number of bytes in @a econtract + * @param contract_pub public key for the DH-encryption + * @param purse_pub purse’s public key + * @param purse_sig the signature made with purpose #TALER_SIGNATURE_WALLET_PURSE_CREATE + * @return #GNUNET_OK if the signature is valid + */ +enum GNUNET_GenericReturnValue +TALER_wallet_econtract_upload_verify ( + const void *econtract, + size_t econtract_size, + const struct TALER_ContractDiffiePublicP *contract_pub, + const struct TALER_PurseContractPublicKeyP *purse_pub, + const struct TALER_PurseContractSignatureP *purse_sig) +{ + struct TALER_PurseContractPS pc = { + .purpose.size = htonl (sizeof (pc)), + .purpose.purpose = htonl (TALER_SIGNATURE_WALLET_PURSE_ECONTRACT), + .contract_pub = *contract_pub + }; + + GNUNET_CRYPTO_hash (econtract, + econtract_size, + &pc.h_econtract); + return GNUNET_CRYPTO_eddsa_verify_ (TALER_SIGNATURE_WALLET_RESERVE_CLOSE, + &pc.purpose, + &purse_sig->eddsa_signature, + &purse_pub->eddsa_pub); +} + + /* end of wallet_signatures.c */ |