1 files changed, 52 insertions, 0 deletions
diff --git a/services/crypto/tests/unit/test_crypto_random.js b/services/crypto/tests/unit/test_crypto_random.js
new file mode 100644
index 0000000000..bd913c81e8
--- /dev/null
+++ b/services/crypto/tests/unit/test_crypto_random.js
@@ -0,0 +1,52 @@
+const { WeaveCrypto } = ChromeUtils.importESModule(
+  "resource://services-crypto/WeaveCrypto.sys.mjs"
+);
+
+var cryptoSvc = new WeaveCrypto();
+
+add_task(async function test_crypto_random() {
+  if (this.gczeal) {
+    _("Running crypto random tests with gczeal(2).");
+    gczeal(2);
+  }
+
+  // Test salt generation.
+  var salt;
+
+  salt = cryptoSvc.generateRandomBytes(0);
+  Assert.equal(salt.length, 0);
+  salt = cryptoSvc.generateRandomBytes(1);
+  Assert.equal(salt.length, 4);
+  salt = cryptoSvc.generateRandomBytes(2);
+  Assert.equal(salt.length, 4);
+  salt = cryptoSvc.generateRandomBytes(3);
+  Assert.equal(salt.length, 4);
+  salt = cryptoSvc.generateRandomBytes(4);
+  Assert.equal(salt.length, 8);
+  salt = cryptoSvc.generateRandomBytes(8);
+  Assert.equal(salt.length, 12);
+
+  // sanity check to make sure salts seem random
+  var salt2 = cryptoSvc.generateRandomBytes(8);
+  Assert.equal(salt2.length, 12);
+  Assert.notEqual(salt, salt2);
+
+  salt = cryptoSvc.generateRandomBytes(1024);
+  Assert.equal(salt.length, 1368);
+  salt = cryptoSvc.generateRandomBytes(16);
+  Assert.equal(salt.length, 24);
+
+  // Test random key generation
+  var keydata, keydata2, iv;
+
+  keydata = await cryptoSvc.generateRandomKey();
+  Assert.equal(keydata.length, 44);
+  keydata2 = await cryptoSvc.generateRandomKey();
+  Assert.notEqual(keydata, keydata2); // sanity check for randomness
+  iv = cryptoSvc.generateRandomIV();
+  Assert.equal(iv.length, 24);
+
+  if (this.gczeal) {
+    gczeal(0);
+  }
+});