org.wildfly.security.mechanism.digest.DigestQuote Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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 org.wildfly.security.mechanism.digest;

import org.wildfly.common.bytes.ByteStringBuilder;

/**
 * Utility class used to convert string to quoted strings
 *
 * @author Peter Skopek
 *
 */
public class DigestQuote {

    private static final char QUOTE = '\\';

    private DigestQuote() {
    }

    private static boolean quoteNeeded(char ch) {
        return
                ch == '"' || // escape char
                ch == QUOTE || // quote
                ch == 127 || // DEL

                // 0 <= ch <= 31 except CR, LF and TAB
                (ch <= 31 && ch != 13 && ch != 10 && ch != 9);
    }

    /**
     * Creates new String quoted by SASL rules.
     *
     * @param inputStr String to be quoted
     * @return
     */
    public static String quote(String inputStr) {
        int len = inputStr.length();
        StringBuilder sb = new StringBuilder(len);
        for (int i = 0; i < len; i++) {
            char ch = inputStr.charAt(i);
            if (quoteNeeded(ch)) {
                sb.append(QUOTE).append(ch);
            }
            else {
                sb.append(ch);
            }
        }
        return sb.toString();
    }

    public static byte[] quote(byte[] input) {
        ByteStringBuilder bsb = new ByteStringBuilder();
        for (int i = 0; i < input.length; i++) {
            if (quoteNeeded((char)input[i])) {
              bsb.append(QUOTE);
              bsb.append(input, i, 1);
            }
            else {
                bsb.append(input, i, 1);
            }
        }
        return bsb.toArray();
    }

}