diff options
Diffstat (limited to 'base/util/src/netscape/security/x509/PolicyConstraintsExtension.java')
| -rw-r--r-- | base/util/src/netscape/security/x509/PolicyConstraintsExtension.java | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/base/util/src/netscape/security/x509/PolicyConstraintsExtension.java b/base/util/src/netscape/security/x509/PolicyConstraintsExtension.java new file mode 100644 index 000000000..7d98b21ba --- /dev/null +++ b/base/util/src/netscape/security/x509/PolicyConstraintsExtension.java @@ -0,0 +1,306 @@ +// --- 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 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 certificate extension which specifies the + * Policy constraints. + * <p> + * The policy constraints extension can be used in certificates issued to CAs. The policy constraints extension + * constrains path validation in two ways. It can be used to prohibit policy mapping or require that each certificate in + * a path contain an acceptable policy identifier. + * <p> + * The ASN.1 syntax for this is (IMPLICIT tagging is defined in the module definition): + * + * <pre> + * PolicyConstraints ::= SEQUENCE { + * requireExplicitPolicy [0] SkipCerts OPTIONAL, + * inhibitPolicyMapping [1] SkipCerts OPTIONAL + * } + * SkipCerts ::= INTEGER (0..MAX) + * </pre> + * + * @author Amit Kapoor + * @author Hemma Prafullchandra + * @version 1.9 + * @see Extension + * @see CertAttrSet + */ +public class PolicyConstraintsExtension extends Extension + implements CertAttrSet { + /** + * + */ + private static final long serialVersionUID = -3723759691127622370L; + /** + * 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.PolicyConstraints"; + /** + * Attribute names. + */ + public static final String NAME = "PolicyConstraints"; + public static final String REQUIRE = "require"; + public static final String INHIBIT = "inhibit"; + + private static final byte TAG_REQUIRE = 0; + private static final byte TAG_INHIBIT = 1; + + private int require = -1; + private int inhibit = -1; + + // Encode this extension value. + private void encodeThis() throws IOException { + DerOutputStream tagged = new DerOutputStream(); + DerOutputStream seq = new DerOutputStream(); + + if (require != -1) { + DerOutputStream tmp = new DerOutputStream(); + tmp.putInteger(new BigInt(require)); + tagged.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT, + false, TAG_REQUIRE), tmp); + } + if (inhibit != -1) { + DerOutputStream tmp = new DerOutputStream(); + tmp.putInteger(new BigInt(inhibit)); + tagged.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT, + false, TAG_INHIBIT), tmp); + } + seq.write(DerValue.tag_Sequence, tagged); + extensionValue = seq.toByteArray(); + } + + /** + * Create a PolicyConstraintsExtension object with criticality and + * both require explicit policy and inhibit policy mapping. + * + * @param critical whether this extension should be critical + * @param require require explicit policy (-1 for optional). + * @param inhibit inhibit policy mapping (-1 for optional). + */ + public PolicyConstraintsExtension(boolean crit, int require, int inhibit) + throws IOException { + init(crit, require, inhibit); + } + + /** + * Create a PolicyConstraintsExtension object with both + * require explicit policy and inhibit policy mapping. + * + * @param require require explicit policy (-1 for optional). + * @param inhibit inhibit policy mapping (-1 for optional). + */ + public PolicyConstraintsExtension(int require, int inhibit) + throws IOException { + init(false, require, inhibit); + } + + private void init(boolean crit, int require, int inhibit) + throws IOException { + this.require = require; + this.inhibit = inhibit; + this.extensionId = PKIXExtensions.PolicyConstraints_Id; + this.critical = crit; + encodeThis(); + } + + /** + * Create the extension from its DER encoded value and criticality. + * + * @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 PolicyConstraintsExtension(Boolean critical, Object value) + throws IOException { + this.extensionId = PKIXExtensions.PolicyConstraints_Id; + this.critical = critical.booleanValue(); + + if (!(value instanceof byte[])) + throw new IOException("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); + if (val.tag != DerValue.tag_Sequence) { + throw new IOException("Sequence tag missing for PolicyConstraint."); + } + DerInputStream in = val.data; + while (in != null && in.available() != 0) { + DerValue next = in.getDerValue(); + + if (next.isContextSpecific(TAG_REQUIRE) && !next.isConstructed()) { + if (this.require != -1) + throw new IOException("Duplicate requireExplicitPolicy" + + "found in the PolicyConstraintsExtension"); + next.resetTag(DerValue.tag_Integer); + this.require = (next.getInteger()).toInt(); + + } else if (next.isContextSpecific(TAG_INHIBIT) && + !next.isConstructed()) { + if (this.inhibit != -1) + throw new IOException("Duplicate inhibitPolicyMapping" + + "found in the PolicyConstraintsExtension"); + next.resetTag(DerValue.tag_Integer); + this.inhibit = (next.getInteger()).toInt(); + } else + throw new IOException("Invalid encoding of PolicyConstraint"); + } + } + + /** + * Return the extension as user readable string. + */ + public String toString() { + String s; + s = super.toString() + "PolicyConstraints: [" + " Require: "; + if (require == -1) + s += "unspecified;"; + else + s += require + ";"; + s += "\tInhibit: "; + if (inhibit == -1) + s += "unspecified"; + else + s += inhibit; + s += " ]\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 DerOutputStream. + * + * @param out the DerOutputStream 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.PolicyConstraints_Id; + encodeThis(); + } + super.encode(tmp); + out.write(tmp.toByteArray()); + } + + /** + * Set the attribute value. + */ + public void set(String name, Object obj) throws IOException { + clearValue(); + if (!(obj instanceof Integer)) { + throw new IOException("Attribute value should be of type Integer."); + } + if (name.equalsIgnoreCase(REQUIRE)) { + require = ((Integer) obj).intValue(); + } else if (name.equalsIgnoreCase(INHIBIT)) { + inhibit = ((Integer) obj).intValue(); + } else { + throw new IOException("Attribute name " + "[" + name + "]" + + " not recognized by " + + "CertAttrSet:PolicyConstraints."); + } + } + + /** + * Get the attribute value. + */ + public Object get(String name) throws IOException { + if (name.equalsIgnoreCase(REQUIRE)) { + return Integer.valueOf(require); + } else if (name.equalsIgnoreCase(INHIBIT)) { + return Integer.valueOf(inhibit); + } else { + throw new IOException("Attribute name not recognized by " + + "CertAttrSet:PolicyConstraints."); + } + } + + /** + * Delete the attribute value. + */ + public void delete(String name) throws IOException { + if (name.equalsIgnoreCase(REQUIRE)) { + require = -1; + } else if (name.equalsIgnoreCase(INHIBIT)) { + inhibit = -1; + } else { + throw new IOException("Attribute name not recognized by " + + "CertAttrSet:PolicyConstraints."); + } + } + + /** + * Return an enumeration of names of attributes existing within this + * attribute. + */ + public Enumeration<String> getAttributeNames() { + Vector<String> elements = new Vector<String>(); + elements.addElement(REQUIRE); + elements.addElement(INHIBIT); + + return (elements.elements()); + } + + /** + * Return the name of this attribute. + */ + public String getName() { + return (NAME); + } + + /** + * returns the requireExplicitMapping parameter. + */ + public int getRequireExplicitMapping() { + return require; + } + + /** + * returns the inhibitPolicyMapping parameter. + */ + public int getInhibitPolicyMapping() { + return inhibit; + } +} |