From 7eb989b2dffe418d40a5101c05054cd4bfa4474a Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Tue, 8 Feb 2022 00:12:56 +0100
Subject: -get melt and refresh-reveal to pass again

---
 src/util/crypto.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'src/util/crypto.c')

diff --git a/src/util/crypto.c b/src/util/crypto.c
index 8e48b48d..a32a1023 100644
--- a/src/util/crypto.c
+++ b/src/util/crypto.c
@@ -176,6 +176,27 @@ TALER_transfer_secret_to_planchet_secret (
 }
 
 
+void
+TALER_planchet_secret_to_transfer_priv (
+  const struct TALER_PlanchetSecretsP *ps,
+  uint32_t cnc_num,
+  struct TALER_TransferPrivateKeyP *tpriv)
+{
+  uint32_t be_salt = htonl (cnc_num);
+
+  GNUNET_assert (GNUNET_OK ==
+                 GNUNET_CRYPTO_kdf (tpriv,
+                                    sizeof (*tpriv),
+                                    &be_salt,
+                                    sizeof (be_salt),
+                                    ps,
+                                    sizeof (*ps),
+                                    "taler-transfer-priv-derivation",
+                                    strlen ("taler-transfer-priv-derivation"),
+                                    NULL, 0));
+}
+
+
 void
 TALER_cs_withdraw_nonce_derive (
   const struct TALER_PlanchetSecretsP *ps,
-- 
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