109 lines
3.3 KiB
Java
109 lines
3.3 KiB
Java
/**
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*
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* Copyright © 2014-2019 Florian Schmaus
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.util.stringencoder;
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import java.io.UnsupportedEncodingException;
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import org.jivesoftware.smack.util.Objects;
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import org.jivesoftware.smack.util.StringUtils;
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public class Base64 {
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private static Base64.Encoder base64encoder;
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public static void setEncoder(Base64.Encoder encoder) {
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Objects.requireNonNull(encoder, "encoder must no be null");
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base64encoder = encoder;
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}
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public static final String encode(String string) {
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try {
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return encodeToString(string.getBytes(StringUtils.UTF8));
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} catch (UnsupportedEncodingException e) {
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throw new IllegalStateException("UTF-8 not supported", e);
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}
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}
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public static final String encodeToString(byte[] input) {
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byte[] bytes = encode(input);
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try {
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return new String(bytes, StringUtils.USASCII);
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} catch (UnsupportedEncodingException e) {
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throw new AssertionError(e);
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}
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}
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public static final String encodeToString(byte[] input, int offset, int len) {
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return encodeToString(slice(input, offset, len));
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}
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public static final byte[] encode(byte[] input) {
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return base64encoder.encode(input);
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}
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public static final byte[] encode(byte[] input, int offset, int len) {
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return encode(slice(input, offset, len));
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}
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public static final String decodeToString(String string) {
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byte[] bytes = decode(string);
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try {
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return new String(bytes, StringUtils.UTF8);
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} catch (UnsupportedEncodingException e) {
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throw new IllegalStateException("UTF-8 not supported", e);
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}
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}
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// TODO: We really should not mask the IllegalArgumentException. But some unit test depend on this behavior, like
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// ibb.packet.DataPacketExtension.shouldReturnNullIfDataIsInvalid().
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public static final byte[] decode(String string) {
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try {
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return base64encoder.decode(string);
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} catch (IllegalArgumentException e) {
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return null;
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}
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}
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public static final byte[] decode(byte[] input) {
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String string;
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try {
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string = new String(input, StringUtils.USASCII);
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} catch (UnsupportedEncodingException e) {
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throw new AssertionError(e);
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}
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return decode(string);
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}
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private static byte[] slice(byte[] input, int offset, int len) {
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if (offset == 0 && len == input.length) {
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return input;
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}
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byte[] res = new byte[len];
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System.arraycopy(input, offset, res, 0, len);
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return res;
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}
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public interface Encoder {
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byte[] decode(String string);
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String encodeToString(byte[] input);
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byte[] encode(byte[] input);
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}
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}
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