8236671: NullPointerException in JKS keystore

Reviewed-by: clanger
Backport-of: 276a1bf

Author: TheRealMDoerr

src/java.base/share/classes/com/sun/crypto/provider/JceKeyStore.java

@@ -291,7 +291,7 @@ public void engineSetKeyEntry(String alias, Key key, char[] password,
                 }
 
             } catch (Exception e) {
-                throw new KeyStoreException(e.getMessage());
+                throw new KeyStoreException(e.getMessage(), e);
             }
         }
     }

src/java.base/share/classes/sun/security/provider/JavaKeyStore.java

@@ -263,6 +263,9 @@ public void engineSetKeyEntry(String alias, Key key, char[] password,
         if (!(key instanceof java.security.PrivateKey)) {
             throw new KeyStoreException("Cannot store non-PrivateKeys");
         }
+        if (password == null) {
+            throw new KeyStoreException("password can't be null");
+        }
         try {
             synchronized(entries) {
                 KeyEntry entry = new KeyEntry();

test/jdk/java/security/KeyStore/TestKeyStoreBasic.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -40,7 +40,7 @@
 
 /*
  * @test
- * @bug 8048621 8133090 8167371
+ * @bug 8048621 8133090 8167371 8236671
  * @summary Test basic operations with keystores (jks, jceks, pkcs12)
  * @author Yu-Ching Valerie PENG
  */
@@ -181,6 +181,17 @@ public void runTest(String provider) throws Exception {
         // create an empty key store
         ks.load(null, null);
 
+        // unit test - test with null password
+        try {
+            ks.setKeyEntry(ALIAS_HEAD, privateKey, null,
+                new Certificate[] { cert });
+        } catch (KeyStoreException e) {
+            if (!e.getMessage().contains("password can\'t be null")) {
+                throw new RuntimeException("Unexpected message:" + e.getMessage());
+            }
+            // expected
+        }
+
         // store the secret keys
         for (int j = 0; j < numEntries; j++) {
             ks.setKeyEntry(ALIAS_HEAD + j, privateKey, PASSWDK,