1 files changed, 17 insertions, 10 deletions
diff --git a/packages/taler-util/src/talerCrypto.ts b/packages/taler-util/src/talerCrypto.ts
index c20ce72a6..d96c23236 100644
--- a/packages/taler-util/src/talerCrypto.ts
+++ b/packages/taler-util/src/talerCrypto.ts
@@ -349,18 +349,25 @@ export function hash(d: Uint8Array): Uint8Array {
   return nacl.hash(d);
 }
 
+/**
+ * Hash a denomination public key according to the
+ * algorithm of exchange protocol v10.
+ */
 export function hashDenomPub(pub: DenominationPubKey): Uint8Array {
-  if (pub.cipher !== DenomKeyType.Rsa) {
-    throw Error("unsupported cipher");
+  if (pub.cipher === DenomKeyType.Rsa) {
+    const pubBuf = decodeCrock(pub.rsa_public_key);
+    const hashInputBuf = new ArrayBuffer(pubBuf.length + 4 + 4);
+    const uint8ArrayBuf = new Uint8Array(hashInputBuf);
+    const dv = new DataView(hashInputBuf);
+    dv.setUint32(0, pub.age_mask ?? 0);
+    dv.setUint32(4, pub.cipher);
+    uint8ArrayBuf.set(pubBuf, 8);
+    return nacl.hash(uint8ArrayBuf);
+  } else if (pub.cipher === DenomKeyType.LegacyRsa) {
+    return hash(decodeCrock(pub.rsa_public_key));
+  } else {
+    throw Error(`unsupported cipher (${pub.cipher}), unable to hash`);
   }
-  const pubBuf = decodeCrock(pub.rsa_public_key);
-  const hashInputBuf = new ArrayBuffer(pubBuf.length + 4 + 4);
-  const uint8ArrayBuf = new Uint8Array(hashInputBuf);
-  const dv = new DataView(hashInputBuf);
-  dv.setUint32(0, pub.age_mask ?? 0);
-  dv.setUint32(4, pub.cipher);
-  uint8ArrayBuf.set(pubBuf, 8);
-  return nacl.hash(uint8ArrayBuf);
 }
 
 export function eddsaSign(msg: Uint8Array, eddsaPriv: Uint8Array): Uint8Array {