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The Java operations layer for the MongoDB Java Driver. Third parties can wrap this layer to provide custom higher-level APIs

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/*
 * Copyright 2008-present MongoDB, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.mongodb.internal.authentication;

import org.bson.BsonDocument;
import org.bson.BsonInt32;
import org.bson.BsonString;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

import static com.mongodb.internal.HexUtils.hexMD5;

/**
 * Utility class for working with MongoDB native authentication.
 *
 * 

This class is not part of the public API and may be removed or changed at any time

*/ public final class NativeAuthenticationHelper { /** * Creates a hash of the given user name and password, which is the hex encoding of * {@code MD5( + ":mongo:" + )}. * * @param userName the user name * @param password the password * @return the hash as a string * @mongodb.driver.manual ../meta-driver/latest/legacy/implement-authentication-in-driver/ Authentication */ public static String createAuthenticationHash(final String userName, final char[] password) { ByteArrayOutputStream bout = new ByteArrayOutputStream(userName.length() + 20 + password.length); try { bout.write(userName.getBytes(StandardCharsets.UTF_8)); bout.write(":mongo:".getBytes(StandardCharsets.UTF_8)); bout.write(new String(password).getBytes(StandardCharsets.UTF_8)); } catch (IOException ioe) { throw new RuntimeException("impossible", ioe); } return hexMD5(bout.toByteArray()); } public static BsonDocument getAuthCommand(final String userName, final char[] password, final String nonce) { return getAuthCommand(userName, createAuthenticationHash(userName, password), nonce); } public static BsonDocument getAuthCommand(final String userName, final String authHash, final String nonce) { String key = nonce + userName + authHash; BsonDocument cmd = new BsonDocument(); cmd.put("authenticate", new BsonInt32(1)); cmd.put("user", new BsonString(userName)); cmd.put("nonce", new BsonString(nonce)); cmd.put("key", new BsonString(hexMD5(key.getBytes(StandardCharsets.UTF_8)))); return cmd; } public static BsonDocument getNonceCommand() { return new BsonDocument("getnonce", new BsonInt32(1)); } private NativeAuthenticationHelper() { } }




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