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[taler-exchange] branch master updated: add additinal signature
From: |
gnunet |
Subject: |
[taler-exchange] branch master updated: add additinal signature |
Date: |
Sat, 02 Apr 2022 17:25:24 +0200 |
This is an automated email from the git hooks/post-receive script.
grothoff pushed a commit to branch master
in repository exchange.
The following commit(s) were added to refs/heads/master by this push:
new 6f027fc1 add additinal signature
6f027fc1 is described below
commit 6f027fc13099f870e359aaf295f5e4051801c321
Author: Christian Grothoff <grothoff@gnunet.org>
AuthorDate: Sat Apr 2 17:25:04 2022 +0200
add additinal signature
---
src/include/taler_crypto_lib.h | 37 +++++++++++++++++++
src/include/taler_signatures.h | 4 +++
src/util/wallet_signatures.c | 81 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 122 insertions(+)
diff --git a/src/include/taler_crypto_lib.h b/src/include/taler_crypto_lib.h
index 6b554dfb..5f425341 100644
--- a/src/include/taler_crypto_lib.h
+++ b/src/include/taler_crypto_lib.h
@@ -2726,6 +2726,43 @@ TALER_wallet_purse_create_verify (
const struct TALER_PurseContractSignatureP *purse_sig);
+/**
+ * Sign a request to upload an 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_priv key identifying the purse
+ * @param[out] purse_sig resulting signature
+ */
+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);
+
+
+/**
+ * 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);
+
+
/**
* Sign a request to inquire about a purse's status.
*
diff --git a/src/include/taler_signatures.h b/src/include/taler_signatures.h
index 70c917b6..d3e70a9e 100644
--- a/src/include/taler_signatures.h
+++ b/src/include/taler_signatures.h
@@ -316,6 +316,10 @@
*/
#define TALER_SIGNATURE_WALLET_RESERVE_CLOSE 1215
+/**
+ * Associates encrypted contract with a purse.
+ */
+#define TALER_SIGNATURE_WALLET_PURSE_ECONTRACT 1216
/******************************/
/* Security module signatures */
diff --git a/src/util/wallet_signatures.c b/src/util/wallet_signatures.c
index 756856d2..4b2ddb6c 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 */
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