JAVA-2090: Support non-ASCII passwords

Author: jyemin

driver-core/src/main/com/mongodb/internal/authentication/NativeAuthenticationHelper.java

@@ -50,12 +50,7 @@ public static String createAuthenticationHash(final String userName, final char[
         try {
             bout.write(userName.getBytes(UTF_8_CHARSET));
             bout.write(":mongo:".getBytes(UTF_8_CHARSET));
-            for (final char ch : password) {
-                if (ch >= 128) {
-                    throw new IllegalArgumentException("can't handle non-ascii passwords yet");
-                }
-                bout.write((byte) ch);
-            }
+            bout.write(new String(password).getBytes(UTF_8_CHARSET));
         } catch (IOException ioe) {
             throw new RuntimeException("impossible", ioe);
         }

driver-core/src/test/functional/com/mongodb/operation/UserOperationsSpecification.groovy

@@ -65,7 +65,7 @@ import static com.mongodb.WriteConcern.ACKNOWLEDGED
 import static java.util.Arrays.asList
 
 class UserOperationsSpecification extends OperationFunctionalSpecification {
-    def credential = createCredential('newUser', databaseName, '123'.toCharArray())
+    def credential = createCredential('\u53f0\u5317', databaseName, 'Ta\u0301ibe\u030Ci'.toCharArray())
 
     def 'an added user should be found'() {
         given:

driver-core/src/test/unit/com/mongodb/connection/NativeAuthenticatorUnitTest.java

@@ -41,7 +41,7 @@ public class NativeAuthenticatorUnitTest {
     public void before() {
         connection = new TestInternalConnection(new ServerId(new ClusterId(), new ServerAddress("localhost", 27017)));
         connectionDescription = new ConnectionDescription(new ServerId(new ClusterId(), new ServerAddress()));
-        credential = MongoCredential.createMongoCRCredential("user", "database", "pencil".toCharArray());
+        credential = MongoCredential.createMongoCRCredential("\u53f0\u5317", "database", "Ta\u0301ibe\u030Ci".toCharArray());
         subject = new NativeAuthenticator(this.credential);
     }
 
@@ -114,8 +114,8 @@ private void validateMessages() {
         String secondCommand = MessageHelper.decodeCommandAsJson(sent.get(1));
 
         assertEquals("{ \"getnonce\" : 1 }", firstCommand);
-        assertEquals("{ \"authenticate\" : 1, \"user\" : \"user\", "
+        assertEquals("{ \"authenticate\" : 1, \"user\" : \"\u53f0\u5317\", "
                      + "\"nonce\" : \"2375531c32080ae8\", "
-                     + "\"key\" : \"21742f26431831d5cfca035a08c5bdf6\" }", secondCommand);
+                     + "\"key\" : \"4fb55df196e38eea50d2b8b200acfa8b\" }", secondCommand);
     }
 }