/*
* 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.hadoop.hbase.security.visibility;
import java.util.regex.Pattern;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
/**
* A simple validator that validates the labels passed
*/
@InterfaceAudience.Private
public class VisibilityLabelsValidator {
private static final boolean[] validAuthChars = new boolean[256];
public static final String regex = "[A-Za-z_\\-\\:\\/\\.0-9]+";
public static final Pattern pattern = Pattern.compile(regex);
static {
for (int i = 0; i < 256; i++) {
validAuthChars[i] = false;
}
for (int i = 'a'; i <= 'z'; i++) {
validAuthChars[i] = true;
}
for (int i = 'A'; i <= 'Z'; i++) {
validAuthChars[i] = true;
}
for (int i = '0'; i <= '9'; i++) {
validAuthChars[i] = true;
}
validAuthChars['_'] = true;
validAuthChars['-'] = true;
validAuthChars[':'] = true;
validAuthChars['.'] = true;
validAuthChars['/'] = true;
}
static final boolean isValidAuthChar(byte b) {
return validAuthChars[0xff & b];
}
public static final boolean isValidLabel(byte[] label) {
for (int i = 0; i < label.length; i++) {
if (!isValidAuthChar(label[i])) {
return false;
}
}
return true;
}
}