diff options
Diffstat (limited to 'base/util/src/netscape/security/x509/PrintableConverter.java')
-rw-r--r-- | base/util/src/netscape/security/x509/PrintableConverter.java | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/base/util/src/netscape/security/x509/PrintableConverter.java b/base/util/src/netscape/security/x509/PrintableConverter.java new file mode 100644 index 000000000..d63696d8f --- /dev/null +++ b/base/util/src/netscape/security/x509/PrintableConverter.java @@ -0,0 +1,114 @@ +// --- 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.x509; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.nio.CharBuffer; +import java.nio.charset.CharacterCodingException; +import java.nio.charset.CharsetEncoder; + +import netscape.security.util.ASN1CharStrConvMap; +import netscape.security.util.DerValue; + +/** + * A AVAValueConverter that converts a Printable String attribute to a DerValue + * and vice versa. An example an attribute that is a printable string is "C". + * + * @see ASN1CharStrConvMap + * @see AVAValueConverter + * + * @author Lily Hsiao, Slava Galperin at Netscape Communications, Inc. + */ + +public class PrintableConverter implements AVAValueConverter { + // public constructors. + + public PrintableConverter() { + } + + /** + * Converts a string with ASN.1 Printable characters to a DerValue. + * + * @param valueString a string with Printable characters. + * + * @return a DerValue. + * + * @exception IOException if a Printable encoder is not + * available for the conversion. + */ + public DerValue getValue(String valueString) + throws IOException { + return getValue(valueString, null); + } + + public DerValue getValue(String valueString, byte[] tags) throws IOException { + try { + CharsetEncoder encoder = ASN1CharStrConvMap.getDefault().getEncoder(DerValue.tag_PrintableString); + if (encoder == null) + throw new IOException("No encoder for printable"); + + CharBuffer charBuffer = CharBuffer.wrap(valueString.toCharArray()); + ByteBuffer byteBuffer = encoder.encode(charBuffer); + + return new DerValue(DerValue.tag_PrintableString, + byteBuffer.array(), byteBuffer.arrayOffset(), byteBuffer.limit()); + + } catch (CharacterCodingException e) { + throw new IllegalArgumentException("Invalid Printable String AVA Value", e); + } + } + + /** + * Converts a BER encoded value of PrintableString to a DER encoded value. + * Checks if the BER encoded value is a PrintableString. + * NOTE only DER encoded values are currently accepted on input. + * + * @param berStream A byte array of the BER encoded value. + * + * @return A DerValue. + * + * @exception IOException if the BER value cannot be converted to a + * PrintableString DER value. + */ + public DerValue getValue(byte[] berStream) + throws IOException { + DerValue value = new DerValue(berStream); + if (value.tag != DerValue.tag_PrintableString) + throw new IOException("Invalid Printable String AVA Value"); + return value; + } + + /** + * Converts a DerValue of PrintableString to a java string with + * PrintableString characters. + * + * @param avaValue a DerValue. + * + * @return a string with PrintableString characters. + * + * @exception IOException if the DerValue is not a PrintableString i.e. + * The DerValue cannot be converted to a string + * with PrintableString characters. + */ + public String getAsString(DerValue avaValue) + throws IOException { + return avaValue.getPrintableString(); + } + +} |