1 files changed, 51 insertions, 0 deletions
diff --git a/services/crypto/tests/unit/test_jwcrypto.js b/services/crypto/tests/unit/test_jwcrypto.js
new file mode 100644
index 0000000000..02f064d431
--- /dev/null
+++ b/services/crypto/tests/unit/test_jwcrypto.js
@@ -0,0 +1,51 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+ChromeUtils.defineESModuleGetters(this, {
+  jwcrypto: "resource://services-crypto/jwcrypto.sys.mjs",
+});
+
+// Enable logging from jwcrypto.jsm.
+Services.prefs.setStringPref("services.crypto.jwcrypto.log.level", "Debug");
+
+add_task(async function test_jwe_roundtrip_ecdh_es_encryption() {
+  const plaintext = crypto.getRandomValues(new Uint8Array(123));
+  const remoteKey = await crypto.subtle.generateKey(
+    {
+      name: "ECDH",
+      namedCurve: "P-256",
+    },
+    true,
+    ["deriveKey"]
+  );
+  const remoteJWK = await crypto.subtle.exportKey("jwk", remoteKey.publicKey);
+  delete remoteJWK.key_ops;
+  const jwe = await jwcrypto.generateJWE(remoteJWK, plaintext);
+  const decrypted = await jwcrypto.decryptJWE(jwe, remoteKey.privateKey);
+  Assert.deepEqual(plaintext, decrypted);
+});
+
+add_task(async function test_jwe_header_includes_key_id() {
+  const plaintext = crypto.getRandomValues(new Uint8Array(123));
+  const remoteKey = await crypto.subtle.generateKey(
+    {
+      name: "ECDH",
+      namedCurve: "P-256",
+    },
+    true,
+    ["deriveKey"]
+  );
+  const remoteJWK = await crypto.subtle.exportKey("jwk", remoteKey.publicKey);
+  delete remoteJWK.key_ops;
+  remoteJWK.kid = "key identifier";
+  const jwe = await jwcrypto.generateJWE(remoteJWK, plaintext);
+  let [header /* other items deliberately ignored */] = jwe.split(".");
+  header = JSON.parse(
+    new TextDecoder().decode(
+      ChromeUtils.base64URLDecode(header, { padding: "reject" })
+    )
+  );
+  Assert.equal(header.kid, "key identifier");
+});