--- /dev/null
+//
+// ========================================================================
+// Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
+// ------------------------------------------------------------------------
+// All rights reserved. This program and the accompanying materials
+// are made available under the terms of the Eclipse Public License v1.0
+// and Apache License v2.0 which accompanies this distribution.
+//
+// The Eclipse Public License is available at
+// http://www.eclipse.org/legal/epl-v10.html
+//
+// The Apache License v2.0 is available at
+// http://www.opensource.org/licenses/apache2.0.php
+//
+// You may elect to redistribute this code under either of these licenses.
+// ========================================================================
+//
+
+package org.eclipse.jetty.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.nio.charset.UnsupportedCharsetException;
+
+
+/** Fast B64 Encoder/Decoder as described in RFC 1421.
+ * <p>Does not insert or interpret whitespace as described in RFC
+ * 1521. If you require this you must pre/post process your data.
+ * <p> Note that in a web context the usual case is to not want
+ * linebreaks or other white space in the encoded output.
+ *
+ */
+public class B64Code
+{
+ private static final char __pad='=';
+ private static final char[] __rfc1421alphabet=
+ {
+ '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[] __rfc1421nibbles;
+ static
+ {
+ __rfc1421nibbles=new byte[256];
+ for (int i=0;i<256;i++)
+ __rfc1421nibbles[i]=-1;
+ for (byte b=0;b<64;b++)
+ __rfc1421nibbles[(byte)__rfc1421alphabet[b]]=b;
+ __rfc1421nibbles[(byte)__pad]=0;
+ }
+
+ private B64Code()
+ {
+ }
+
+ /**
+ * Base 64 encode as described in RFC 1421.
+ * <p>Does not insert whitespace as described in RFC 1521.
+ * @param s String to encode.
+ * @return String containing the encoded form of the input.
+ */
+ public static String encode(String s)
+ {
+ return encode(s, (Charset)null);
+ }
+
+ /**
+ * Base 64 encode as described in RFC 1421.
+ * <p>Does not insert whitespace as described in RFC 1521.
+ * @param s String to encode.
+ * @param charEncoding String representing the name of
+ * the character encoding of the provided input String.
+ * @return String containing the encoded form of the input.
+ */
+ public static String encode(String s,String charEncoding)
+ {
+ byte[] bytes;
+ if (charEncoding==null)
+ bytes=s.getBytes(StandardCharsets.ISO_8859_1);
+ else
+ bytes=s.getBytes(Charset.forName(charEncoding));
+ return new String(encode(bytes));
+ }
+
+ /**
+ * Base 64 encode as described in RFC 1421.
+ * <p>Does not insert whitespace as described in RFC 1521.
+ * @param s String to encode.
+ * @param charEncoding The character encoding of the provided input String.
+ * @return String containing the encoded form of the input.
+ */
+ public static String encode(String s, Charset charEncoding)
+ {
+ byte[] bytes=s.getBytes(charEncoding==null ? StandardCharsets.ISO_8859_1 : charEncoding);
+ return new String(encode(bytes));
+ }
+
+ /**
+ * Fast Base 64 encode as described in RFC 1421.
+ * <p>Does not insert whitespace as described in RFC 1521.
+ * <p> Avoids creating extra copies of the input/output.
+ * @param b byte array to encode.
+ * @return char array containing the encoded form of the input.
+ */
+ public static char[] encode(byte[] b)
+ {
+ if (b==null)
+ return null;
+
+ int bLen=b.length;
+ int cLen=((bLen+2)/3)*4;
+ char c[]=new char[cLen];
+ int ci=0;
+ int bi=0;
+ byte b0, b1, b2;
+ int stop=(bLen/3)*3;
+ while (bi<stop)
+ {
+ b0=b[bi++];
+ b1=b[bi++];
+ b2=b[bi++];
+ c[ci++]=__rfc1421alphabet[(b0>>>2)&0x3f];
+ c[ci++]=__rfc1421alphabet[(b0<<4)&0x3f|(b1>>>4)&0x0f];
+ c[ci++]=__rfc1421alphabet[(b1<<2)&0x3f|(b2>>>6)&0x03];
+ c[ci++]=__rfc1421alphabet[b2&0x3f];
+ }
+
+ if (bLen!=bi)
+ {
+ switch (bLen%3)
+ {
+ case 2:
+ b0=b[bi++];
+ b1=b[bi++];
+ c[ci++]=__rfc1421alphabet[(b0>>>2)&0x3f];
+ c[ci++]=__rfc1421alphabet[(b0<<4)&0x3f|(b1>>>4)&0x0f];
+ c[ci++]=__rfc1421alphabet[(b1<<2)&0x3f];
+ c[ci++]=__pad;
+ break;
+
+ case 1:
+ b0=b[bi++];
+ c[ci++]=__rfc1421alphabet[(b0>>>2)&0x3f];
+ c[ci++]=__rfc1421alphabet[(b0<<4)&0x3f];
+ c[ci++]=__pad;
+ c[ci++]=__pad;
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ return c;
+ }
+
+ /**
+ * Fast Base 64 encode as described in RFC 1421 and RFC2045
+ * <p>Does not insert whitespace as described in RFC 1521, unless rfc2045 is passed as true.
+ * <p> Avoids creating extra copies of the input/output.
+ * @param b byte array to encode.
+ * @param rfc2045 If true, break lines at 76 characters with CRLF
+ * @return char array containing the encoded form of the input.
+ */
+ public static char[] encode(byte[] b, boolean rfc2045)
+ {
+ if (b==null)
+ return null;
+ if (!rfc2045)
+ return encode(b);
+
+ int bLen=b.length;
+ int cLen=((bLen+2)/3)*4;
+ cLen+=2+2*(cLen/76);
+ char c[]=new char[cLen];
+ int ci=0;
+ int bi=0;
+ byte b0, b1, b2;
+ int stop=(bLen/3)*3;
+ int l=0;
+ while (bi<stop)
+ {
+ b0=b[bi++];
+ b1=b[bi++];
+ b2=b[bi++];
+ c[ci++]=__rfc1421alphabet[(b0>>>2)&0x3f];
+ c[ci++]=__rfc1421alphabet[(b0<<4)&0x3f|(b1>>>4)&0x0f];
+ c[ci++]=__rfc1421alphabet[(b1<<2)&0x3f|(b2>>>6)&0x03];
+ c[ci++]=__rfc1421alphabet[b2&0x3f];
+ l+=4;
+ if (l%76==0)
+ {
+ c[ci++]=13;
+ c[ci++]=10;
+ }
+ }
+
+ if (bLen!=bi)
+ {
+ switch (bLen%3)
+ {
+ case 2:
+ b0=b[bi++];
+ b1=b[bi++];
+ c[ci++]=__rfc1421alphabet[(b0>>>2)&0x3f];
+ c[ci++]=__rfc1421alphabet[(b0<<4)&0x3f|(b1>>>4)&0x0f];
+ c[ci++]=__rfc1421alphabet[(b1<<2)&0x3f];
+ c[ci++]=__pad;
+ break;
+
+ case 1:
+ b0=b[bi++];
+ c[ci++]=__rfc1421alphabet[(b0>>>2)&0x3f];
+ c[ci++]=__rfc1421alphabet[(b0<<4)&0x3f];
+ c[ci++]=__pad;
+ c[ci++]=__pad;
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ c[ci++]=13;
+ c[ci++]=10;
+ return c;
+ }
+
+ /**
+ * Base 64 decode as described in RFC 2045.
+ * <p>Unlike {@link #decode(char[])}, extra whitespace is ignored.
+ * @param encoded String to decode.
+ * @param charEncoding String representing the character encoding
+ * used to map the decoded bytes into a String.
+ * @return String decoded byte array.
+ * @throws UnsupportedCharsetException if the encoding is not supported
+ * @throws IllegalArgumentException if the input is not a valid
+ * B64 encoding.
+ */
+ public static String decode(String encoded,String charEncoding)
+ {
+ byte[] decoded=decode(encoded);
+ if (charEncoding==null)
+ return new String(decoded);
+ return new String(decoded,Charset.forName(charEncoding));
+ }
+
+ /**
+ * Base 64 decode as described in RFC 2045.
+ * <p>Unlike {@link #decode(char[])}, extra whitespace is ignored.
+ * @param encoded String to decode.
+ * @param charEncoding Character encoding
+ * used to map the decoded bytes into a String.
+ * @return String decoded byte array.
+ * @throws IllegalArgumentException if the input is not a valid
+ * B64 encoding.
+ */
+ public static String decode(String encoded, Charset charEncoding)
+ {
+ byte[] decoded=decode(encoded);
+ if (charEncoding==null)
+ return new String(decoded);
+ return new String(decoded, charEncoding);
+ }
+
+ /**
+ * Fast Base 64 decode as described in RFC 1421.
+ *
+ * <p>Unlike other decode methods, this does not attempt to
+ * cope with extra whitespace as described in RFC 1521/2045.
+ * <p> Avoids creating extra copies of the input/output.
+ * <p> Note this code has been flattened for performance.
+ * @param b char array to decode.
+ * @return byte array containing the decoded form of the input.
+ * @throws IllegalArgumentException if the input is not a valid
+ * B64 encoding.
+ */
+ public static byte[] decode(char[] b)
+ {
+ if (b==null)
+ return null;
+
+ int bLen=b.length;
+ if (bLen%4!=0)
+ throw new IllegalArgumentException("Input block size is not 4");
+
+ int li=bLen-1;
+ while (li>=0 && b[li]==(byte)__pad)
+ li--;
+
+ if (li<0)
+ return new byte[0];
+
+ // Create result array of exact required size.
+ int rLen=((li+1)*3)/4;
+ byte r[]=new byte[rLen];
+ int ri=0;
+ int bi=0;
+ int stop=(rLen/3)*3;
+ byte b0,b1,b2,b3;
+ try
+ {
+ while (ri<stop)
+ {
+ b0=__rfc1421nibbles[b[bi++]];
+ b1=__rfc1421nibbles[b[bi++]];
+ b2=__rfc1421nibbles[b[bi++]];
+ b3=__rfc1421nibbles[b[bi++]];
+ if (b0<0 || b1<0 || b2<0 || b3<0)
+ throw new IllegalArgumentException("Not B64 encoded");
+
+ r[ri++]=(byte)(b0<<2|b1>>>4);
+ r[ri++]=(byte)(b1<<4|b2>>>2);
+ r[ri++]=(byte)(b2<<6|b3);
+ }
+
+ if (rLen!=ri)
+ {
+ switch (rLen%3)
+ {
+ case 2:
+ b0=__rfc1421nibbles[b[bi++]];
+ b1=__rfc1421nibbles[b[bi++]];
+ b2=__rfc1421nibbles[b[bi++]];
+ if (b0<0 || b1<0 || b2<0)
+ throw new IllegalArgumentException("Not B64 encoded");
+ r[ri++]=(byte)(b0<<2|b1>>>4);
+ r[ri++]=(byte)(b1<<4|b2>>>2);
+ break;
+
+ case 1:
+ b0=__rfc1421nibbles[b[bi++]];
+ b1=__rfc1421nibbles[b[bi++]];
+ if (b0<0 || b1<0)
+ throw new IllegalArgumentException("Not B64 encoded");
+ r[ri++]=(byte)(b0<<2|b1>>>4);
+ break;
+
+ default:
+ break;
+ }
+ }
+ }
+ catch (IndexOutOfBoundsException e)
+ {
+ throw new IllegalArgumentException("char "+bi
+ +" was not B64 encoded");
+ }
+
+ return r;
+ }
+
+ /**
+ * Base 64 decode as described in RFC 2045.
+ * <p>Unlike {@link #decode(char[])}, extra whitespace is ignored.
+ * @param encoded String to decode.
+ * @return byte array containing the decoded form of the input.
+ * @throws IllegalArgumentException if the input is not a valid
+ * B64 encoding.
+ */
+ public static byte[] decode(String encoded)
+ {
+ if (encoded==null)
+ return null;
+
+ ByteArrayOutputStream bout = new ByteArrayOutputStream(4*encoded.length()/3);
+ decode(encoded, bout);
+ return bout.toByteArray();
+ }
+
+ /* ------------------------------------------------------------ */
+ /**
+ * Base 64 decode as described in RFC 2045.
+ * <p>Unlike {@link #decode(char[])}, extra whitespace is ignored.
+ * @param encoded String to decode.
+ * @param bout stream for decoded bytes
+ * @throws IllegalArgumentException if the input is not a valid
+ * B64 encoding.
+ */
+ static public void decode (String encoded, ByteArrayOutputStream bout)
+ {
+ if (encoded==null)
+ return;
+
+ if (bout == null)
+ throw new IllegalArgumentException("No outputstream for decoded bytes");
+
+ int ci=0;
+ byte nibbles[] = new byte[4];
+ int s=0;
+
+ while (ci<encoded.length())
+ {
+ char c=encoded.charAt(ci++);
+
+ if (c==__pad)
+ break;
+
+ if (Character.isWhitespace(c))
+ continue;
+
+ byte nibble=__rfc1421nibbles[c];
+ if (nibble<0)
+ throw new IllegalArgumentException("Not B64 encoded");
+
+ nibbles[s++]=__rfc1421nibbles[c];
+
+ switch(s)
+ {
+ case 1:
+ break;
+ case 2:
+ bout.write(nibbles[0]<<2|nibbles[1]>>>4);
+ break;
+ case 3:
+ bout.write(nibbles[1]<<4|nibbles[2]>>>2);
+ break;
+ case 4:
+ bout.write(nibbles[2]<<6|nibbles[3]);
+ s=0;
+ break;
+ }
+
+ }
+
+ return;
+ }
+
+
+ public static void encode(int value,Appendable buf) throws IOException
+ {
+ buf.append(__rfc1421alphabet[0x3f&((0xFC000000&value)>>26)]);
+ buf.append(__rfc1421alphabet[0x3f&((0x03F00000&value)>>20)]);
+ buf.append(__rfc1421alphabet[0x3f&((0x000FC000&value)>>14)]);
+ buf.append(__rfc1421alphabet[0x3f&((0x00003F00&value)>>8)]);
+ buf.append(__rfc1421alphabet[0x3f&((0x000000FC&value)>>2)]);
+ buf.append(__rfc1421alphabet[0x3f&((0x00000003&value)<<4)]);
+ buf.append('=');
+ }
+
+ public static void encode(long lvalue,Appendable buf) throws IOException
+ {
+ int value=(int)(0xFFFFFFFC&(lvalue>>32));
+ buf.append(__rfc1421alphabet[0x3f&((0xFC000000&value)>>26)]);
+ buf.append(__rfc1421alphabet[0x3f&((0x03F00000&value)>>20)]);
+ buf.append(__rfc1421alphabet[0x3f&((0x000FC000&value)>>14)]);
+ buf.append(__rfc1421alphabet[0x3f&((0x00003F00&value)>>8)]);
+ buf.append(__rfc1421alphabet[0x3f&((0x000000FC&value)>>2)]);
+
+ buf.append(__rfc1421alphabet[0x3f&((0x00000003&value)<<4) + (0xf&(int)(lvalue>>28))]);
+
+ value=0x0FFFFFFF&(int)lvalue;
+ buf.append(__rfc1421alphabet[0x3f&((0x0FC00000&value)>>22)]);
+ buf.append(__rfc1421alphabet[0x3f&((0x003F0000&value)>>16)]);
+ buf.append(__rfc1421alphabet[0x3f&((0x0000FC00&value)>>10)]);
+ buf.append(__rfc1421alphabet[0x3f&((0x000003F0&value)>>4)]);
+ buf.append(__rfc1421alphabet[0x3f&((0x0000000F&value)<<2)]);
+ }
+}
projects / gigi.git / blobdiff