/*
* Copyright ( c ) 2005 , 2020 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
* or visit www . oracle . com if you need additional information or have any
* questions .
*/
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright ( C ) 2003 - 2004 , International Business Machines Corporation and *
* others . All Rights Reserved . *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.text.ParseException;
import jdk.internal.icu.text.StringPrep;
import jdk.internal.icu.text.UCharacterIterator;
/**
* @ author ram
*
* This is a dumb implementation of NFS4 profiles . It is a direct port of
* C code , does not use Object Oriented principles . Quick and Dirty implementation
* for testing .
*/
public final class NFS4StringPrep {
private StringPrep nfscss = null ;
private StringPrep nfscsi = null ;
private StringPrep nfscis = null ;
private StringPrep nfsmxp = null ;
private StringPrep nfsmxs = null ;
//singleton instance
private static final NFS4StringPrep prep = new NFS4StringPrep();
private NFS4StringPrep (){
ClassLoader loader = NFS4StringPrep.class .getClassLoader();
try {
InputStream nfscsiFile = loader.getResourceAsStream("nfscsi.spp" );
nfscsi = new StringPrep(nfscsiFile);
nfscsiFile.close();
InputStream nfscssFile = loader.getResourceAsStream("nfscss.spp" );
nfscss = new StringPrep(nfscssFile);
nfscssFile.close();
InputStream nfscisFile = loader.getResourceAsStream("nfscis.spp" );
nfscis = new StringPrep(nfscisFile);
nfscisFile.close();
InputStream nfsmxpFile = loader.getResourceAsStream("nfsmxp.spp" );
nfsmxp = new StringPrep(nfsmxpFile);
nfsmxpFile.close();
InputStream nfsmxsFile = loader.getResourceAsStream("nfsmxs.spp" );
nfsmxs = new StringPrep(nfsmxsFile);
nfsmxsFile.close();
}catch (IOException e){
throw new RuntimeException(e.toString());
}
}
private static byte [] prepare(byte [] src, StringPrep prep)
throws ParseException, UnsupportedEncodingException{
String s = new String(src, "UTF-8" );
UCharacterIterator iter = UCharacterIterator.getInstance(s);
StringBuffer out = prep.prepare(iter,StringPrep.DEFAULT );
return out.toString().getBytes("UTF-8" );
}
public static byte [] cs_prepare(byte [] src, boolean isCaseSensitive)
throws ParseException, UnsupportedEncodingException{
if (isCaseSensitive == true ){
return prepare(src, prep.nfscss);
}else {
return prepare(src, prep.nfscsi);
}
}
public static byte [] cis_prepare(byte [] src)
throws IOException, ParseException, UnsupportedEncodingException{
return prepare(src, prep.nfscis);
}
/* sorted array for binary search*/
private static final String[] special_prefixes={
"ANONYMOUS" ,
"AUTHENTICATED" ,
"BATCH" ,
"DIALUP" ,
"EVERYONE" ,
"GROUP" ,
"INTERACTIVE" ,
"NETWORK" ,
"OWNER" ,
};
/* binary search the sorted array */
private static final int findStringIndex(String[] sortedArr,String target){
int left, middle, right,rc;
left =0 ;
right= sortedArr.length-1 ;
while (left <= right){
middle = (left+right)/2 ;
rc= sortedArr[middle].compareTo(target);
if (rc<0 ){
left = middle+1 ;
}else if (rc >0 ){
right = middle -1 ;
}else {
return middle;
}
}
return -1 ;
}
private static final char AT_SIGN = '@' ;
public static byte [] mixed_prepare(byte [] src)
throws IOException, ParseException, UnsupportedEncodingException{
String s = new String(src, "UTF-8" );
int index = s.indexOf(AT_SIGN);
StringBuffer out = new StringBuffer();
if (index > -1 ){
/* special prefixes must not be followed by suffixes! */
String prefixString = s.substring(0 ,index);
int i= findStringIndex(special_prefixes, prefixString);
String suffixString = s.substring(index+1 , s.length());
if (i>-1 && !suffixString.equals("" )){
throw new ParseException("Suffix following a special index" , -1 );
}
UCharacterIterator prefix = UCharacterIterator.getInstance(prefixString);
UCharacterIterator suffix = UCharacterIterator.getInstance(suffixString);
out.append(prep.nfsmxp.prepare(prefix,StringPrep.DEFAULT ));
out.append(AT_SIGN); // add the delimiter
out.append(prep.nfsmxs.prepare(suffix, StringPrep.DEFAULT ));
}else {
UCharacterIterator iter = UCharacterIterator.getInstance(s);
out.append(prep.nfsmxp.prepare(iter,StringPrep.DEFAULT ));
}
return out.toString().getBytes("UTF-8" );
}
}
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