1 files changed, 84 insertions, 2 deletions
diff --git a/packages/taler-util/src/talerCrypto.test.ts b/packages/taler-util/src/talerCrypto.test.ts
index 70ad8a614..5e8f37d80 100644
--- a/packages/taler-util/src/talerCrypto.test.ts
+++ b/packages/taler-util/src/talerCrypto.test.ts
@@ -34,6 +34,10 @@ import {
   scalarMultBase25519,
   deriveSecrets,
   calcRBlind,
+  Edx25519,
+  getRandomBytes,
+  bigintToNaclArr,
+  bigintFromNaclArr,
 } from "./talerCrypto.js";
 import { sha512, kdf } from "./kdf.js";
 import * as nacl from "./nacl-fast.js";
@@ -44,6 +48,7 @@ import { initNodePrng } from "./prng-node.js";
 initNodePrng();
 import bigint from "big-integer";
 import { AssertionError } from "assert";
+import BigInteger from "big-integer";
 
 test("encoding", (t) => {
   const s = "Hello, World";
@@ -343,9 +348,86 @@ test("taler CS blind c", async (t) => {
   };
 
   const sig = await csUnblind(bseed, rPub, pub, b, blindsig);
-  t.deepEqual(sig.s, decodeCrock("F4ZKMFW3Q7DFN0N94KAMG2JFFHAC362T0QZ6ZCVZ73RS8P91CR70"));
-  t.deepEqual(sig.rPub, decodeCrock("CHK7JC4SXZ4Y9RDA3881S82F7BP99H35Q361WR6RBXN5YN2ZM1M0"));
+  t.deepEqual(
+    sig.s,
+    decodeCrock("F4ZKMFW3Q7DFN0N94KAMG2JFFHAC362T0QZ6ZCVZ73RS8P91CR70"),
+  );
+  t.deepEqual(
+    sig.rPub,
+    decodeCrock("CHK7JC4SXZ4Y9RDA3881S82F7BP99H35Q361WR6RBXN5YN2ZM1M0"),
+  );
 
   const res = await csVerify(decodeCrock(msg_hash), sig, pub);
   t.deepEqual(res, true);
 });
+
+test("bigint/nacl conversion", async (t) => {
+  const b1 = BigInteger(42);
+  const n1 = bigintToNaclArr(b1, 32);
+  t.is(n1[0], 42);
+  t.is(n1.length, 32);
+  const b2 = bigintFromNaclArr(n1);
+  t.true(b1.eq(b2));
+});
+
+test("taler age restriction crypto", async (t) => {
+  const priv1 = await Edx25519.keyCreate();
+  const pub1 = await Edx25519.getPublic(priv1);
+
+  const seed = encodeCrock(getRandomBytes(32));
+
+  const priv2 = await Edx25519.privateKeyDerive(priv1, seed);
+  const pub2 = await Edx25519.publicKeyDerive(pub1, seed);
+
+  const pub2Ref = await Edx25519.getPublic(priv2);
+
+  t.is(pub2, pub2Ref);
+});
+
+test("edx signing", async (t) => {
+  const priv1 = await Edx25519.keyCreate();
+  const pub1 = await Edx25519.getPublic(priv1);
+
+  const msg = stringToBytes("hello world");
+
+  const sig = nacl.crypto_edx25519_sign_detached(
+    msg,
+    decodeCrock(priv1),
+    decodeCrock(pub1),
+  );
+
+  t.true(
+    nacl.crypto_edx25519_sign_detached_verify(msg, sig, decodeCrock(pub1)),
+  );
+
+  sig[0]++;
+
+  t.false(
+    nacl.crypto_edx25519_sign_detached_verify(msg, sig, decodeCrock(pub1)),
+  );
+});
+
+test("edx test vector", async (t) => {
+  // Generated by gnunet-crypto-tvg
+  const tv = {
+    operation: "edx25519_derive",
+    priv1_edx:
+      "216KF1XM46K4JN8TX3Z8HNRX1DX4WRMX1BTCQM3KBS83PYKFY1GV6XRNBYRC5YM02HVDX8BDR20V7A27YX4MZJ8X8K0ADPZ43BD1GXG",
+    pub1_edx: "RKGRRG74SZ8PKF8SYG5SSDY8VRCYYGY5N2AKAJCG0103Z3JK6HTG",
+    seed: "EFK7CYT98YWGPNZNHPP84VJZDMXD5A41PP3E94NSAQZXRCAKVVXHAQNXG9XM2MAND2FJ56ZM238KGDCF3B0KCWNZCYKKHKDB56X6QA0",
+    priv2_edx:
+      "JRV3S06REHQV90E4HJA1FAMCVDBZZAZP9C6N2WF01MSR3CD5KM28QM7HTGGAV6MBJZ73QJ8PSZFA0D6YENJ7YT97344FDVVCGVAFNER",
+    pub2_edx: "ZB546ZC7ZP16DB99AMK67WNZ67WZFPWMRY67Y4PZR9YR1D82GVZ0",
+  };
+
+  {
+    const pub1Prime = await Edx25519.getPublic(tv.priv1_edx);
+    t.is(pub1Prime, tv.pub1_edx);
+  }
+
+  const pub2Prime = await Edx25519.publicKeyDerive(tv.pub1_edx, tv.seed);
+  t.is(pub2Prime, tv.pub2_edx);
+
+  const priv2Prime = await Edx25519.privateKeyDerive(tv.priv1_edx, tv.seed);
+  t.is(priv2Prime, tv.priv2_edx);
+});