[taler-exchange] 10/24: add token issue signature methods

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christian-blaettler pushed a commit to branch master
in repository exchange.

commit 002b4bf117c73ad6fca1731e23b6816a0d2800c2
Author: Christian Blättler <blatc2@bfh.ch>
AuthorDate: Thu Apr 25 16:27:10 2024 +0200

    add token issue signature methods
---
 src/include/taler_crypto_lib.h | 38 +++++++++++++++++++++++++++++++++++---
 src/util/tokens.c              |  2 +-
 2 files changed, 36 insertions(+), 4 deletions(-)

diff --git a/src/include/taler_crypto_lib.h b/src/include/taler_crypto_lib.h
index 00f93c26d..e2f377448 100644
--- a/src/include/taler_crypto_lib.h
+++ b/src/include/taler_crypto_lib.h
@@ -2302,7 +2302,7 @@ struct TALER_TokenIssueBlindSignatureP
 
 /**
  * The public key of a token. An EdDSA public key generated by the wallet
- * and blindly signed by the merchant using the @struct 
TALER_TokenIssuePrivateKey.
+ * and blindly signed by the merchant using the @struct 
TALER_TokenIssuePrivateKeyP.
  */
 struct TALER_TokenUsePublicKeyP
 {
@@ -2328,6 +2328,17 @@ struct TALER_TokenUseSignatureP
   struct GNUNET_CRYPTO_EddsaSignature signature;
 };
 
+/**
+ * The blinded token use public key of a token. Ready to be signed by the 
merchant.
+ */
+struct TALER_TokenEnvelopeP
+{
+  /**
+   * Blinded public key of the token.
+   */
+  struct GNUNET_CRYPTO_BlindedMessage blinded_pub;
+};
+
 
 /**
  * Free internals of @a issue_sig, but not @a issue_sig itself.
@@ -3913,12 +3924,33 @@ TALER_merchant_refund_verify (
   const struct TALER_MerchantSignatureP *merchant_sig);
 
 
+/**
+ * Issue a new token by signing a token envelope, that contains the
+ * blinded public key provided by the wallet.
+ *
+ * @param envelope the token envelope to sign
+ * @param issue_priv token issue private key to sign with
+ * @param[out] blind_sig where to write the blinded issue signature
+ */
 void
-TALER_merchant_token_issue_sign ();
+TALER_merchant_token_issue_sign (
+  const struct TALER_TokenEnvelopeP *envelope,
+  const struct TALER_TokenIssuePrivateKeyP *issue_priv,
+  struct TALER_TokenIssueBlindSignatureP *blind_sig);
 
 
+/**
+ * Verify a token issue signature.
+ *
+ * @param use_pub token use public key
+ * @param issue_pub token issue public key
+ * @param ub_sig unblinded signature
+ */
 enum GNUNET_GenericReturnValue
-TALER_merchant_token_issue_verify ();
+TALER_merchant_token_issue_verify (
+  const struct TALER_TokenUsePublicKeyP *use_pub,
+  const struct TALER_TokenIssuePublicKeyP *issue_pub,
+  const struct TALER_TokenIssueSignatureP *ub_sig);
 
 
 /* ********************* exchange deposit signing ************************* */
diff --git a/src/util/tokens.c b/src/util/tokens.c
index 61fe40501..3086d8777 100644
--- a/src/util/tokens.c
+++ b/src/util/tokens.c
@@ -23,7 +23,7 @@
 
 
 void
-TALER_token_issue_sig_free (struct TALER_TokenIssueSignature *issue_sig)
+TALER_token_issue_sig_free (struct TALER_TokenIssueSignatureP *issue_sig)
 {
   if (NULL != issue_sig->signature)
   {

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