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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.x509;
import java.io.IOException;
import netscape.security.util.DerOutputStream;
import netscape.security.util.DerValue;
/**
* This class implements the ASN.1 GeneralName object class.
* <p>
* The ASN.1 syntax for this is:
* <pre>
* GeneralName ::= CHOICE {
* otherName [0] OtherName,
* rfc822Name [1] IA5String,
* dNSName [2] IA5String,
* x400Address [3] ORAddress,
* directoryName [4] Name,
* ediPartyName [5] EDIPartyName,
* uniformResourceIdentifier [6] IA5String,
* iPAddress [7] OCTET STRING,
* registeredID [8] OBJECT IDENTIFIER
* }
* </pre>
* @author Amit Kapoor
* @author Hemma Prafullchandra
* @version 1.7
*/
public class GeneralName implements GeneralNameInterface {
// Private data members
private GeneralNameInterface name = null;
/**
* Default constructor for the class.
*
* @param name the selected CHOICE from the list.
*/
public GeneralName(GeneralNameInterface name) {
this.name = name;
}
/**
* Create the object from its DER encoded value.
*
* @param encName the DER encoded GeneralName.
*/
public GeneralName(DerValue encName) throws IOException {
short tag = (byte)(encName.tag & 0x1f);
// NB. this is always encoded with the IMPLICIT tag
// The checks only make sense if we assume implicit tagging,
// with explicit tagging the form is always constructed.
switch (tag) {
case GeneralNameInterface.NAME_RFC822:
if (encName.isContextSpecific() && !encName.isConstructed()) {
encName.resetTag(DerValue.tag_IA5String);
name = new RFC822Name(encName);
} else
throw new IOException("Invalid encoding of RFC822 name");
break;
case GeneralNameInterface.NAME_DNS:
if (encName.isContextSpecific() && !encName.isConstructed()) {
encName.resetTag(DerValue.tag_IA5String);
name = new DNSName(encName);
} else
throw new IOException("Invalid encoding of DNS name");
break;
case GeneralNameInterface.NAME_URI:
if (encName.isContextSpecific() && !encName.isConstructed()) {
encName.resetTag(DerValue.tag_IA5String);
name = new URIName(encName);
} else
throw new IOException("Invalid encoding of URI");
break;
case GeneralNameInterface.NAME_IP:
if (encName.isContextSpecific() && !encName.isConstructed()) {
encName.resetTag(DerValue.tag_OctetString);
name = new IPAddressName(encName);
} else
throw new IOException("Invalid encoding of IP address");
break;
case GeneralNameInterface.NAME_ANY:
if (encName.isContextSpecific() && encName.isConstructed()) {
encName.resetTag(DerValue.tag_OctetString);
name = new OtherName(encName);
} else
throw new IOException("Invalid encoding of other name");
break;
case GeneralNameInterface.NAME_OID:
if (encName.isContextSpecific() && !encName.isConstructed()) {
encName.resetTag(DerValue.tag_ObjectId);
name = new OIDName(encName);
} else
throw new IOException("Invalid encoding of OID name");
break;
case GeneralNameInterface.NAME_DIRECTORY:
if (encName.isContextSpecific() && encName.isConstructed()) {
// Unlike the other cases, DirectoryName is EXPLICITly
// tagged, because the X.500 Name type is a CHOICE.
// Therefore, the sequence is actually nested in the
// content of this value. We'll pretend it's an octet
// string so we can get at the content bytes.
encName.resetTag(DerValue.tag_OctetString);
byte[] content = encName.getOctetString();
name = new X500Name( content );
} else
throw new IOException("Invalid encoding of Directory name");
break;
case GeneralNameInterface.NAME_EDI:
if (encName.isContextSpecific() && encName.isConstructed()) {
encName.resetTag(DerValue.tag_Sequence);
name = new EDIPartyName(encName);
} else
throw new IOException("Invalid encoding of EDI name");
break;
default:
throw new IOException("Unrecognized GeneralName tag, ("
+ tag +")");
}
}
/**
* Return the type of the general name.
*/
public int getType() {
return (name.getType());
}
/**
* Return the name as user readable string
*/
public String toString() {
return (name.toString());
}
/**
* Encode the name to the specified DerOutputStream.
*
* @param out the DerOutputStream to encode the the GeneralName to.
* @exception IOException on encoding errors.
*/
public void encode(DerOutputStream out) throws IOException {
DerOutputStream tmp = new DerOutputStream();
name.encode(tmp);
int nameType = name.getType();
boolean constructedForm;
if (nameType == GeneralNameInterface.NAME_ANY ||
nameType == GeneralNameInterface.NAME_X400 ||
nameType == GeneralNameInterface.NAME_DIRECTORY ||
nameType == GeneralNameInterface.NAME_EDI) {
constructedForm = true;
} else {
constructedForm = false;
}
if( nameType == GeneralNameInterface.NAME_DIRECTORY ) {
// EXPLICIT tag, because Name is a CHOICE type
out.write(DerValue.createTag(DerValue.TAG_CONTEXT,
constructedForm, (byte)nameType), tmp);
} else {
// IMPLICIT tag, the default
out.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT,
constructedForm, (byte)nameType), tmp);
}
}
}
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