diff options
Diffstat (limited to 'base/util/src/netscape/security/x509/CertificateVersion.java')
-rw-r--r-- | base/util/src/netscape/security/x509/CertificateVersion.java | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/base/util/src/netscape/security/x509/CertificateVersion.java b/base/util/src/netscape/security/x509/CertificateVersion.java new file mode 100644 index 000000000..d3659779f --- /dev/null +++ b/base/util/src/netscape/security/x509/CertificateVersion.java @@ -0,0 +1,247 @@ +// --- 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.io.InputStream; +import java.io.OutputStream; +import java.util.Enumeration; +import java.util.Vector; + +import netscape.security.util.BigInt; +import netscape.security.util.DerInputStream; +import netscape.security.util.DerOutputStream; +import netscape.security.util.DerValue; + +/** + * This class defines the version of the X509 Certificate. + * + * @author Amit Kapoor + * @author Hemma Prafullchandra + * @version 1.8 + * @see CertAttrSet + */ +public class CertificateVersion implements CertAttrSet { + /** + * X509Certificate Version 1 + */ + public static final int V1 = 0; + /** + * X509Certificate Version 2 + */ + public static final int V2 = 1; + /** + * X509Certificate Version 3 + */ + public static final int V3 = 2; + /** + * Identifier for this attribute, to be used with the + * get, set, delete methods of Certificate, x509 type. + */ + public static final String IDENT = "x509.info.version"; + /** + * Sub attributes name for this CertAttrSet. + */ + public static final String NAME = "version"; + public static final String VERSION = "number"; + + // Private data members + int version = V1; + + // Returns the version number. + private int getVersion() { + return (version); + } + + // Construct the class from the passed DerValue + private void construct(DerValue derVal) throws IOException { + if (derVal.isConstructed() && derVal.isContextSpecific()) { + derVal = derVal.data.getDerValue(); + version = derVal.getInteger().toInt(); + if (derVal.data.available() != 0) { + throw new IOException("X.509 version, bad format"); + } + } + } + + /** + * The default constructor for this class, + * sets the version to 0 (i.e. X.509 version 1). + */ + public CertificateVersion() { + version = V1; + } + + /** + * The constructor for this class for the required version. + * + * @param version the version for the certificate. + * @exception IOException if the version is not valid. + */ + public CertificateVersion(int version) throws IOException { + + // check that it is a valid version + if (version == V1 || version == V2 || version == V3) + this.version = version; + else { + throw new IOException("X.509 Certificate version " + + version + " not supported.\n"); + } + } + + /** + * Create the object, decoding the values from the passed DER stream. + * + * @param in the DerInputStream to read the CertificateVersion from. + * @exception IOException on decoding errors. + */ + public CertificateVersion(DerInputStream in) throws IOException { + version = V1; + DerValue derVal = in.getDerValue(); + + construct(derVal); + } + + /** + * Create the object, decoding the values from the passed stream. + * + * @param in the InputStream to read the CertificateVersion from. + * @exception IOException on decoding errors. + */ + public CertificateVersion(InputStream in) throws IOException { + version = V1; + DerValue derVal = new DerValue(in); + + construct(derVal); + } + + /** + * Create the object, decoding the values from the passed DerValue. + * + * @param val the Der encoded value. + * @exception IOException on decoding errors. + */ + public CertificateVersion(DerValue val) throws IOException { + version = V1; + + construct(val); + } + + /** + * Return the version number of the certificate. + */ + public String toString() { + return ("Version: V" + (version + 1)); + } + + /** + * Encode the CertificateVersion period in DER form to the stream. + * + * @param out the OutputStream to marshal the contents to. + * @exception IOException on errors. + */ + public void encode(OutputStream out) throws IOException { + // Nothing for default + if (version == V1) { + return; + } + DerOutputStream tmp = new DerOutputStream(); + tmp.putInteger(new BigInt(version)); + + DerOutputStream seq = new DerOutputStream(); + seq.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0), + tmp); + + out.write(seq.toByteArray()); + } + + /** + * Decode the CertificateVersion period in DER form from the stream. + * + * @param in the InputStream to unmarshal the contents from. + * @exception IOException on errors. + */ + public void decode(InputStream in) throws IOException { + DerValue derVal = new DerValue(in); + construct(derVal); + } + + /** + * Set the attribute value. + */ + public void set(String name, Object obj) throws IOException { + if (!(obj instanceof Integer)) { + throw new IOException("Attribute must be of type Integer."); + } + if (name.equalsIgnoreCase(VERSION)) { + version = ((Integer) obj).intValue(); + } else { + throw new IOException("Attribute name not recognized by " + + "CertAttrSet: CertificateVersion."); + } + } + + /** + * Get the attribute value. + */ + public Object get(String name) throws IOException { + if (name.equalsIgnoreCase(VERSION)) { + return (Integer.valueOf(getVersion())); + } else { + throw new IOException("Attribute name not recognized by " + + "CertAttrSet: CertificateVersion."); + } + } + + /** + * Delete the attribute value. + */ + public void delete(String name) throws IOException { + if (name.equalsIgnoreCase(VERSION)) { + version = V1; + } else { + throw new IOException("Attribute name not recognized by " + + "CertAttrSet: CertificateVersion."); + } + } + + /** + * Return an enumeration of names of attributes existing within this + * attribute. + */ + public Enumeration<String> getAttributeNames() { + Vector<String> elements = new Vector<String>(); + elements.addElement(VERSION); + + return (elements.elements()); + } + + /** + * Return the name of this attribute. + */ + public String getName() { + return (NAME); + } + + /** + * Compare versions. + */ + public int compare(int vers) { + return (version - vers); + } +} |