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Diffstat (limited to 'pki/base/util/src/netscape/security/x509/SubjectAlternativeNameExtension.java')
| -rw-r--r-- | pki/base/util/src/netscape/security/x509/SubjectAlternativeNameExtension.java | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/pki/base/util/src/netscape/security/x509/SubjectAlternativeNameExtension.java b/pki/base/util/src/netscape/security/x509/SubjectAlternativeNameExtension.java new file mode 100644 index 000000000..c57bfcc96 --- /dev/null +++ b/pki/base/util/src/netscape/security/x509/SubjectAlternativeNameExtension.java @@ -0,0 +1,232 @@ +// --- 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.lang.reflect.Array; +import java.util.Enumeration; + +import netscape.security.util.*; + +/** + * This represents the Subject Alternative Name Extension. + * + * This extension, if present, allows the subject to specify multiple + * alternative names. + * + * <p>Extensions are represented as a sequence of the extension identifier + * (Object Identifier), a boolean flag stating whether the extension is to + * be treated as being critical and the extension value itself (this is again + * a DER encoding of the extension value). + * <p> + * The ASN.1 syntax for this is: + * <pre> + * SubjectAltName ::= GeneralNames + * GeneralNames ::= SEQUENCE SIZE (1..MAX) OF GeneralName + * </pre> + * @author Amit Kapoor + * @author Hemma Prafullchandra + * @version 1.9 + * @see Extension + * @see CertAttrSet + */ +public class SubjectAlternativeNameExtension extends Extension +implements CertAttrSet { + /** + * Identifier for this attribute, to be used with the + * get, set, delete methods of Certificate, x509 type. + */ + public static final String IDENT = + "x509.info.extensions.SubjectAlternativeName"; + /** + * Attribute names. + */ + public static final String NAME = "SubjectAlternativeName"; + public static final String SUBJECT_NAME = "subject_name"; + + // private data members + GeneralNames names; + + // Encode this extension + private void encodeThis() throws IOException { + DerOutputStream os = new DerOutputStream(); + try { + names.encode(os); + } catch (GeneralNamesException e) { + throw new IOException("SubjectAlternativeName: " + e); + } + extensionValue = os.toByteArray(); + } + + /** + * Create a SubjectAlternativeNameExtension with the passed GeneralNames. + * + * @param names the GeneralNames for the subject. + * @exception IOException on error. + */ + public SubjectAlternativeNameExtension(boolean critical, GeneralNames names) + throws IOException { + this.names = names; + this.extensionId = PKIXExtensions.SubjectAlternativeName_Id; + this.critical = critical; + encodeThis(); + } + public SubjectAlternativeNameExtension(GeneralNames names) + throws IOException { + this.names = names; + this.extensionId = PKIXExtensions.SubjectAlternativeName_Id; + this.critical = false; + encodeThis(); + } + + /** + * Create a default SubjectAlternativeNameExtension. + */ + public SubjectAlternativeNameExtension() { + extensionId = PKIXExtensions.SubjectAlternativeName_Id; + critical = false; + names = new GeneralNames(); + } + + /** + * Create the extension from the passed DER encoded value. + * + * @param critical true if the extension is to be treated as critical. + * @param value Array of DER encoded bytes of the actual value. + * @exception IOException on error. + */ + public SubjectAlternativeNameExtension(Boolean critical, Object value) + throws IOException { + this.extensionId = PKIXExtensions.SubjectAlternativeName_Id; + this.critical = critical.booleanValue(); + + if (!(value instanceof byte[])) + throw new IOException("SubjectAlternativeName: " + + "Illegal argument type"); + + int len = Array.getLength(value); + byte[] extValue = new byte[len]; + System.arraycopy(value, 0, extValue, 0, len); + + this.extensionValue = extValue; + DerValue val = new DerValue(extValue); + try { + names = new GeneralNames(val); + } catch (GeneralNamesException e) { + throw new IOException("SubjectAlternativeName: " + e); + } + } + + /** + * Returns a printable representation of the SubjectAlternativeName. + */ + public String toString() { + if (names == null) return ""; + String s = super.toString() + "SubjectAlternativeName [\n" + + names.toString() + "]\n"; + return (s); + } + + /** + * Decode the extension from the InputStream. + * + * @param in the InputStream to unmarshal the contents from. + * @exception IOException on decoding or validity errors. + */ + public void decode(InputStream in) throws IOException { + throw new IOException("Method not to be called directly."); + } + + /** + * Write the extension to the OutputStream. + * + * @param out the OutputStream to write the extension to. + * @exception IOException on encoding errors. + */ + public void encode(OutputStream out) throws IOException { + DerOutputStream tmp = new DerOutputStream(); + if (extensionValue == null) { + extensionId = PKIXExtensions.SubjectAlternativeName_Id; + //critical = false; + encodeThis(); + } + super.encode(tmp); + out.write(tmp.toByteArray()); + } + + /** + * Set the attribute value. + */ + public void set(String name, Object obj) throws IOException { + clearValue(); + if (name.equalsIgnoreCase(SUBJECT_NAME)) { + if (!(obj instanceof GeneralNames)) { + throw new IOException("Attribute value should be of " + + "type GeneralNames."); + } + names = (GeneralNames)obj; + } else { + throw new IOException("Attribute name not recognized by " + + "CertAttrSet:SubjectAlternativeName."); + } + } + + /** + * Get the attribute value. + */ + public Object get(String name) throws IOException { + if (name.equalsIgnoreCase(SUBJECT_NAME)) { + return (names); + } else { + throw new IOException("Attribute name not recognized by " + + "CertAttrSet:SubjectAlternativeName."); + } + } + + /** + * Delete the attribute value. + */ + public void delete(String name) throws IOException { + if (name.equalsIgnoreCase(SUBJECT_NAME)) { + names = null; + } else { + throw new IOException("Attribute name not recognized by " + + "CertAttrSet:SubjectAlternativeName."); + } + } + + /** + * Return an enumeration of names of attributes existing within this + * attribute. + */ + public Enumeration getElements () { + AttributeNameEnumeration elements = new AttributeNameEnumeration(); + elements.addElement(SUBJECT_NAME); + + return (elements.elements()); + } + + /** + * Return the name of this attribute. + */ + public String getName () { + return (NAME); + } +} |