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CredentialInjector.java
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CredentialInjector.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.zeppelin.notebook;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.zeppelin.interpreter.InterpreterResult;
import org.apache.zeppelin.interpreter.InterpreterResultMessage;
import org.apache.zeppelin.user.UserCredentials;
import org.apache.zeppelin.user.UsernamePassword;
/**
* Class for replacing $[user.>credentialkey<] and
* $[password.>credentialkey<] tags with the matching credentials from
* zeppelin
*/
class CredentialInjector {
private Set<String> passwords = new HashSet<>();
private final UserCredentials creds;
public CredentialInjector(UserCredentials creds) {
this.creds = creds;
}
public String replaceCredentials(String code) {
if (code == null) {
return null;
}
String replaced = code;
Pattern userpattern = Pattern.compile("\\$\\[user\\.([^\\]]+)\\]");
Pattern passwordpattern = Pattern.compile("\\$\\[password\\.([^\\]]+)\\]");
Matcher matcher = userpattern.matcher(replaced);
while (matcher.find()) {
String key = matcher.group(1);
UsernamePassword usernamePassword = creds.getUsernamePassword(key);
String value = usernamePassword == null ? "undef" : usernamePassword.getUsername();
replaced = matcher.replaceFirst(value);
matcher = userpattern.matcher(replaced);
}
matcher = passwordpattern.matcher(replaced);
while (matcher.find()) {
String key = matcher.group(1);
UsernamePassword usernamePassword = creds.getUsernamePassword(key);
if (usernamePassword != null) {
passwords.add(usernamePassword.getPassword());
}
String value = usernamePassword == null ? "undef" : usernamePassword.getPassword();
replaced = matcher.replaceFirst(value);
matcher = passwordpattern.matcher(replaced);
}
return replaced;
}
public InterpreterResult hidePasswords(InterpreterResult ret) {
if (ret == null) {
return null;
}
return new InterpreterResult(ret.code(), replacePasswords(ret.message()));
}
private List<InterpreterResultMessage> replacePasswords(List<InterpreterResultMessage> original) {
List<InterpreterResultMessage> replaced = new ArrayList<>();
for (InterpreterResultMessage msg : original) {
String replacedMessages = replacePasswords(msg.getData());
replaced.add(new InterpreterResultMessage(msg.getType(), replacedMessages));
}
return replaced;
}
private String replacePasswords(String str) {
String result = str;
for (String password : passwords) {
result = result.replace(password, "###");
}
return result;
}
}