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com.sun.enterprise.universal.GFBase64Decoder Maven / Gradle / Ivy
/*
* Copyright (c) 2009, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.enterprise.universal;
import java.io.*;
import java.nio.ByteBuffer;
public class GFBase64Decoder { // java.util.Base64 is private constructor and so moving/reusing sun.misc.BASE64Decoder
private static final char[] pem_array = new char[]{'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'};
private static final byte[] pem_convert_array = new byte[256];
byte[] decode_buffer = new byte[4];
protected int bytesPerAtom() {
return 4;
}
protected int bytesPerLine() {
return 72;
}
protected void decodeAtom(PushbackInputStream var1, OutputStream var2, int var3) throws IOException {
byte var5 = -1;
byte var6 = -1;
byte var7 = -1;
byte var8 = -1;
if(var3 < 2) {
throw new IOException("BASE64Decoder: Not enough bytes for an atom.");
} else {
int var4;
do {
var4 = var1.read();
if(var4 == -1) {
throw new IOException();
}
} while(var4 == 10 || var4 == 13);
this.decode_buffer[0] = (byte)var4;
var4 = this.readFully(var1, this.decode_buffer, 1, var3 - 1);
if(var4 == -1) {
throw new IOException();
} else {
if(var3 > 3 && this.decode_buffer[3] == 61) {
var3 = 3;
}
if(var3 > 2 && this.decode_buffer[2] == 61) {
var3 = 2;
}
switch(var3) {
case 4:
var8 = pem_convert_array[this.decode_buffer[3] & 255];
case 3:
var7 = pem_convert_array[this.decode_buffer[2] & 255];
case 2:
var6 = pem_convert_array[this.decode_buffer[1] & 255];
var5 = pem_convert_array[this.decode_buffer[0] & 255];
default:
switch(var3) {
case 2:
var2.write((byte)(var5 << 2 & 252 | var6 >>> 4 & 3));
break;
case 3:
var2.write((byte)(var5 << 2 & 252 | var6 >>> 4 & 3));
var2.write((byte)(var6 << 4 & 240 | var7 >>> 2 & 15));
break;
case 4:
var2.write((byte)(var5 << 2 & 252 | var6 >>> 4 & 3));
var2.write((byte)(var6 << 4 & 240 | var7 >>> 2 & 15));
var2.write((byte)(var7 << 6 & 192 | var8 & 63));
}
}
}
}
}
static {
int var0;
for(var0 = 0; var0 < 255; ++var0) {
pem_convert_array[var0] = -1;
}
for(var0 = 0; var0 < pem_array.length; ++var0) {
pem_convert_array[pem_array[var0]] = (byte)var0;
}
}
// from CharacterDecoder
protected void decodeBufferPrefix(PushbackInputStream var1, OutputStream var2) throws IOException {
}
protected void decodeBufferSuffix(PushbackInputStream var1, OutputStream var2) throws IOException {
}
protected int decodeLinePrefix(PushbackInputStream var1, OutputStream var2) throws IOException {
return this.bytesPerLine();
}
protected void decodeLineSuffix(PushbackInputStream var1, OutputStream var2) throws IOException {
}
protected int readFully(InputStream var1, byte[] var2, int var3, int var4) throws IOException {
for(int var5 = 0; var5 < var4; ++var5) {
int var6 = var1.read();
if(var6 == -1) {
return var5 == 0?-1:var5;
}
var2[var5 + var3] = (byte)var6;
}
return var4;
}
public void decodeBuffer(InputStream var1, OutputStream var2) throws IOException {
int var4 = 0;
PushbackInputStream var5 = new PushbackInputStream(var1);
this.decodeBufferPrefix(var5, var2);
while(true) {
try {
int var6 = this.decodeLinePrefix(var5, var2);
int var3;
for(var3 = 0; var3 + this.bytesPerAtom() < var6; var3 += this.bytesPerAtom()) {
this.decodeAtom(var5, var2, this.bytesPerAtom());
var4 += this.bytesPerAtom();
}
if(var3 + this.bytesPerAtom() == var6) {
this.decodeAtom(var5, var2, this.bytesPerAtom());
var4 += this.bytesPerAtom();
} else {
this.decodeAtom(var5, var2, var6 - var3);
var4 += var6 - var3;
}
this.decodeLineSuffix(var5, var2);
} catch (IOException var8) {
this.decodeBufferSuffix(var5, var2);
return;
}
}
}
public byte[] decodeBuffer(String var1) throws IOException {
byte[] var2 = new byte[var1.length()];
var1.getBytes(0, var1.length(), var2, 0);
ByteArrayInputStream var3 = new ByteArrayInputStream(var2);
ByteArrayOutputStream var4 = new ByteArrayOutputStream();
this.decodeBuffer(var3, var4);
return var4.toByteArray();
}
public byte[] decodeBuffer(InputStream var1) throws IOException {
ByteArrayOutputStream var2 = new ByteArrayOutputStream();
this.decodeBuffer(var1, var2);
return var2.toByteArray();
}
public ByteBuffer decodeBufferToByteBuffer(String var1) throws IOException {
return ByteBuffer.wrap(this.decodeBuffer(var1));
}
public ByteBuffer decodeBufferToByteBuffer(InputStream var1) throws IOException {
return ByteBuffer.wrap(this.decodeBuffer(var1));
}
}
