257 lines
8.9 KiB
Java
257 lines
8.9 KiB
Java
/*
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* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.security.x509;
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import java.io.IOException;
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import java.util.Locale;
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import sun.security.util.*;
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/**
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* This class implements the RFC822Name as required by the GeneralNames
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* ASN.1 object.
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*
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* @author Amit Kapoor
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* @author Hemma Prafullchandra
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* @see GeneralName
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* @see GeneralNames
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* @see GeneralNameInterface
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*/
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public class RFC822Name implements GeneralNameInterface
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{
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private String name;
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/**
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* Create the RFC822Name object from the passed encoded Der value.
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*
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* @param derValue the encoded DER RFC822Name.
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* @exception IOException on error.
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*/
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public RFC822Name(DerValue derValue) throws IOException {
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name = derValue.getIA5String();
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parseName(name);
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}
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/**
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* Create the RFC822Name object with the specified name.
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*
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* @param name the RFC822Name.
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* @throws IOException on invalid input name
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*/
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public RFC822Name(String name) throws IOException {
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parseName(name);
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this.name = name;
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}
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/**
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* Parse an RFC822Name string to see if it is a valid
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* addr-spec according to IETF RFC822 and RFC2459:
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* [local-part@]domain
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* <p>
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* local-part@ could be empty for an RFC822Name NameConstraint,
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* but the domain at least must be non-empty. Case is not
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* significant.
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*
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* @param name the RFC822Name string
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* @throws IOException if name is not valid
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*/
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public void parseName(String name) throws IOException {
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if (name == null || name.length() == 0) {
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throw new IOException("RFC822Name may not be null or empty");
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}
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// See if domain is a valid domain name
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String domain = name.substring(name.indexOf('@')+1);
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if (domain.length() == 0) {
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throw new IOException("RFC822Name may not end with @");
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} else {
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//An RFC822 NameConstraint could start with a ., although
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//a DNSName may not
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if (domain.startsWith(".")) {
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if (domain.length() == 1)
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throw new IOException("RFC822Name domain may not be just .");
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}
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}
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}
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/**
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* Return the type of the GeneralName.
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*/
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public int getType() {
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return (GeneralNameInterface.NAME_RFC822);
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}
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/**
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* Return the actual name value of the GeneralName.
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*/
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public String getName() {
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return name;
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}
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/**
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* Encode the RFC822 name into the DerOutputStream.
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*
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* @param out the DER stream to encode the RFC822Name to.
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* @exception IOException on encoding errors.
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*/
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public void encode(DerOutputStream out) throws IOException {
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out.putIA5String(name);
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}
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/**
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* Convert the name into user readable string.
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*/
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public String toString() {
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return ("RFC822Name: " + name);
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}
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/**
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* Compares this name with another, for equality.
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*
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* @return true iff the names are equivalent
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* according to RFC2459.
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*/
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public boolean equals(Object obj) {
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if (this == obj)
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return true;
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if (!(obj instanceof RFC822Name))
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return false;
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RFC822Name other = (RFC822Name)obj;
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// RFC2459 mandates that these names are
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// not case-sensitive
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return name.equalsIgnoreCase(other.name);
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}
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/**
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* Returns the hash code value for this object.
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*
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* @return a hash code value for this object.
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*/
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public int hashCode() {
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return name.toUpperCase(Locale.ENGLISH).hashCode();
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}
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/**
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* Return constraint type:<ul>
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* <li>NAME_DIFF_TYPE = -1: input name is different type from name (i.e. does not constrain)
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* <li>NAME_MATCH = 0: input name matches name
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* <li>NAME_NARROWS = 1: input name narrows name
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* <li>NAME_WIDENS = 2: input name widens name
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* <li>NAME_SAME_TYPE = 3: input name does not match or narrow name, but is same type
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* </ul>. These results are used in checking NameConstraints during
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* certification path verification.
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* <p>
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* [RFC2459] When the subjectAltName extension contains an Internet mail address,
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* the address MUST be included as an rfc822Name. The format of an
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* rfc822Name is an "addr-spec" as defined in RFC 822 [RFC 822]. An
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* addr-spec has the form "local-part@domain". Note that an addr-spec
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* has no phrase (such as a common name) before it, has no comment (text
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* surrounded in parentheses) after it, and is not surrounded by "<" and
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* ">". Note that while upper and lower case letters are allowed in an
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* RFC 822 addr-spec, no significance is attached to the case.
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* <p>
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* @param inputName to be checked for being constrained
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* @returns constraint type above
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* @throws UnsupportedOperationException if name is not exact match, but narrowing and widening are
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* not supported for this name type.
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*/
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public int constrains(GeneralNameInterface inputName) throws UnsupportedOperationException {
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int constraintType;
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if (inputName == null)
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constraintType = NAME_DIFF_TYPE;
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else if (inputName.getType() != (GeneralNameInterface.NAME_RFC822)) {
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constraintType = NAME_DIFF_TYPE;
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} else {
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//RFC2459 specifies that case is not significant in RFC822Names
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String inName =
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(((RFC822Name)inputName).getName()).toLowerCase(Locale.ENGLISH);
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String thisName = name.toLowerCase(Locale.ENGLISH);
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if (inName.equals(thisName)) {
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constraintType = NAME_MATCH;
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} else if (thisName.endsWith(inName)) {
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/* if both names contain @, then they had to match exactly */
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if (inName.indexOf('@') != -1) {
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constraintType = NAME_SAME_TYPE;
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} else if (inName.startsWith(".")) {
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constraintType = NAME_WIDENS;
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} else {
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int inNdx = thisName.lastIndexOf(inName);
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if (thisName.charAt(inNdx-1) == '@' ) {
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constraintType = NAME_WIDENS;
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} else {
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constraintType = NAME_SAME_TYPE;
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}
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}
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} else if (inName.endsWith(thisName)) {
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/* if thisName contains @, then they had to match exactly */
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if (thisName.indexOf('@') != -1) {
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constraintType = NAME_SAME_TYPE;
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} else if (thisName.startsWith(".")) {
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constraintType = NAME_NARROWS;
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} else {
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int ndx = inName.lastIndexOf(thisName);
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if (inName.charAt(ndx-1) == '@') {
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constraintType = NAME_NARROWS;
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} else {
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constraintType = NAME_SAME_TYPE;
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}
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}
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} else {
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constraintType = NAME_SAME_TYPE;
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}
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}
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return constraintType;
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}
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/**
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* Return subtree depth of this name for purposes of determining
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* NameConstraints minimum and maximum bounds.
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*
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* @returns distance of name from root
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* @throws UnsupportedOperationException if not supported for this name type
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*/
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public int subtreeDepth() throws UnsupportedOperationException {
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String subtree=name;
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int i=1;
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/* strip off name@ portion */
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int atNdx = subtree.lastIndexOf('@');
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if (atNdx >= 0) {
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i++;
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subtree=subtree.substring(atNdx+1);
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}
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/* count dots in dnsname, adding one if dnsname preceded by @ */
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for (; subtree.lastIndexOf('.') >= 0; i++) {
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subtree=subtree.substring(0,subtree.lastIndexOf('.'));
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}
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return i;
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}
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}
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