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Elasticsearch subproject :server
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.common.settings;
import java.io.BufferedReader;
import java.io.CharArrayWriter;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import joptsimple.OptionSet;
import joptsimple.OptionSpec;
import org.elasticsearch.cli.EnvironmentAwareCommand;
import org.elasticsearch.cli.ExitCodes;
import org.elasticsearch.cli.Terminal;
import org.elasticsearch.cli.UserException;
import org.elasticsearch.env.Environment;
/**
* A subcommand for the keystore cli which adds a string setting.
*/
class AddStringKeyStoreCommand extends EnvironmentAwareCommand {
private final OptionSpec stdinOption;
private final OptionSpec forceOption;
private final OptionSpec arguments;
AddStringKeyStoreCommand() {
super("Add a string setting to the keystore");
this.stdinOption = parser.acceptsAll(Arrays.asList("x", "stdin"), "Read setting value from stdin");
this.forceOption = parser.acceptsAll(Arrays.asList("f", "force"), "Overwrite existing setting without prompting");
this.arguments = parser.nonOptions("setting name");
}
// pkg private so tests can manipulate
InputStream getStdin() {
return System.in;
}
@Override
protected void execute(Terminal terminal, OptionSet options, Environment env) throws Exception {
KeyStoreWrapper keystore = KeyStoreWrapper.load(env.configFile());
if (keystore == null) {
if (options.has(forceOption) == false &&
terminal.promptYesNo("The elasticsearch keystore does not exist. Do you want to create it?", false) == false) {
terminal.println("Exiting without creating keystore.");
return;
}
keystore = KeyStoreWrapper.create();
keystore.save(env.configFile(), new char[0] /* always use empty passphrase for auto created keystore */);
terminal.println("Created elasticsearch keystore in " + env.configFile());
} else {
keystore.decrypt(new char[0] /* TODO: prompt for password when they are supported */);
}
String setting = arguments.value(options);
if (setting == null) {
throw new UserException(ExitCodes.USAGE, "The setting name can not be null");
}
if (keystore.getSettingNames().contains(setting) && options.has(forceOption) == false) {
if (terminal.promptYesNo("Setting " + setting + " already exists. Overwrite?", false) == false) {
terminal.println("Exiting without modifying keystore.");
return;
}
}
final char[] value;
if (options.has(stdinOption)) {
try (BufferedReader stdinReader = new BufferedReader(new InputStreamReader(getStdin(), StandardCharsets.UTF_8));
CharArrayWriter writer = new CharArrayWriter()) {
int charInt;
while ((charInt = stdinReader.read()) != -1) {
if ((char) charInt == '\r' || (char) charInt == '\n') {
break;
}
writer.write((char) charInt);
}
value = writer.toCharArray();
}
} else {
value = terminal.readSecret("Enter value for " + setting + ": ");
}
try {
keystore.setString(setting, value);
} catch (final IllegalArgumentException e) {
throw new UserException(ExitCodes.DATA_ERROR, e.getMessage());
}
keystore.save(env.configFile(), new char[0]);
}
}