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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program 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 for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package netscape.security.util;
import sun.io.CharToByteConverter;
import sun.io.ConversionBufferFullException;
import sun.io.MalformedInputException;
import sun.io.UnknownCharacterException;
/**
* Converts a string of ASN.1 PrintableString characters to PrintableString
* bytes.
*
* @author Lily Hsiao
* @author Slava Galperin
*/
public class CharToBytePrintable extends CharToByteConverter {
/*
* returns the character set id for the conversion.
*
* @return the character set id.
*/
public String getCharacterEncoding() {
return "ASN.1 Printable";
}
public static boolean isPrintableChar(char c) {
if ((c < 'A' || c > 'Z') && (c < 'a' || c > 'z')
&& (c < '0' || c > '9') && (c != ' ') && (c != '\'')
&& (c != '(') && (c != ')') && (c != '+') && (c != ',')
&& (c != '-') && (c != '.') && (c != '/') && (c != ':')
&& (c != '=') && (c != '?')) {
return false;
} else {
return true;
}
}
/*
* Converts an array of Unicode characters into an array of Printable String
* bytes and returns the total number of characters converted. If conversion
* cannot be done, UnknownCharacterException is thrown. The character and
* byte offset will be set to the point of the unknown character.
*
* @param input character array to convert.
*
* @param inStart offset from which to start the conversion.
*
* @param inEnd where to end the conversion.
*
* @param output byte array to store converted bytes.
*
* @param outStart starting offset in the output byte array.
*
* @param outEnd ending offset in the output byte array.
*
* @return the number of characters converted.
*/
public int convert(char[] input, int inStart, int inEnd, byte[] output,
int outStart, int outEnd) throws MalformedInputException,
UnknownCharacterException, ConversionBufferFullException {
int j = outStart;
int i;
for (i = inStart; i < inEnd; i++, j++) {
if (j >= outEnd) {
charOff = i;
byteOff = j;
throw new ConversionBufferFullException();
}
if (!subMode && !isPrintableChar(input[i])) {
charOff = i;
byteOff = j;
badInputLength = 1;
throw new UnknownCharacterException();
}
output[j] = (byte) (input[i] & 0x7f);
}
charOff = i;
byteOff = j;
return j - outStart;
}
public int flush(byte[] output, int outStart, int outEnd)
throws MalformedInputException, ConversionBufferFullException {
return 0;
}
public void reset() {
}
public int getMaxBytesPerChar() {
return 1;
}
}
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