001/** 002 * 003 * Copyright © 2014-2015 Florian Schmaus 004 * 005 * Licensed under the Apache License, Version 2.0 (the "License"); 006 * you may not use this file except in compliance with the License. 007 * You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.jivesoftware.smack.util.stringencoder; 018 019import java.io.UnsupportedEncodingException; 020 021import org.jivesoftware.smack.util.Objects; 022import org.jivesoftware.smack.util.StringUtils; 023 024public class Base64 { 025 026 private static Base64.Encoder base64encoder; 027 028 public static void setEncoder(Base64.Encoder encoder) { 029 Objects.requireNonNull(encoder, "encoder must no be null"); 030 base64encoder = encoder; 031 } 032 033 public static final String encode(String string) { 034 try { 035 return encodeToString(string.getBytes(StringUtils.UTF8)); 036 } catch (UnsupportedEncodingException e) { 037 throw new IllegalStateException("UTF-8 not supported", e); 038 } 039 } 040 041 public static final String encodeToString(byte[] input) { 042 byte[] bytes = encode(input); 043 try { 044 return new String(bytes, StringUtils.USASCII); 045 } catch (UnsupportedEncodingException e) { 046 throw new AssertionError(e); 047 } 048 } 049 050 public static final String encodeToString(byte[] input, int offset, int len) { 051 byte[] bytes = encode(input, offset, len); 052 try { 053 return new String(bytes, StringUtils.USASCII); 054 } catch (UnsupportedEncodingException e) { 055 throw new AssertionError(e); 056 } 057 } 058 059 public static final byte[] encode(byte[] input) { 060 return encode(input, 0, input.length); 061 } 062 063 public static final byte[] encode(byte[] input, int offset, int len) { 064 return base64encoder.encode(input, offset, len); 065 } 066 067 public static final String decodeToString(String string) { 068 byte[] bytes = decode(string); 069 try { 070 return new String(bytes, StringUtils.UTF8); 071 } catch (UnsupportedEncodingException e) { 072 throw new IllegalStateException("UTF-8 not supported", e); 073 } 074 } 075 076 public static final String decodeToString(byte[] input, int offset, int len) { 077 byte[] bytes = decode(input, offset, len); 078 try { 079 return new String(bytes, StringUtils.UTF8); 080 } catch (UnsupportedEncodingException e) { 081 throw new IllegalStateException("UTF-8 not supported", e); 082 } 083 } 084 085 public static final byte[] decode(String string) { 086 return base64encoder.decode(string); 087 } 088 089 public static final byte[] decode(byte[] input) { 090 return base64encoder.decode(input, 0, input.length); 091 } 092 093 public static final byte[] decode(byte[] input, int offset, int len) { 094 return base64encoder.decode(input, offset, len); 095 } 096 097 public interface Encoder { 098 byte[] decode(String string); 099 100 byte[] decode(byte[] input, int offset, int len); 101 102 String encodeToString(byte[] input, int offset, int len); 103 104 byte[] encode(byte[] input, int offset, int len); 105 } 106}