| /* |
| * Copyright (c) 1997, 1999, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.security.x509; |
| |
| import java.io.IOException; |
| import java.security.PublicKey; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| |
| import sun.misc.HexDumpEncoder; |
| import sun.security.util.*; |
| |
| /** |
| * Represent the Key Identifier ASN.1 object. |
| * |
| * @author Amit Kapoor |
| * @author Hemma Prafullchandra |
| */ |
| public class KeyIdentifier { |
| private byte[] octetString; |
| |
| /** |
| * Create a KeyIdentifier with the passed bit settings. |
| * |
| * @param octetString the octet string identifying the key identifier. |
| */ |
| public KeyIdentifier(byte[] octetString) { |
| this.octetString = octetString.clone(); |
| } |
| |
| /** |
| * Create a KeyIdentifier from the DER encoded value. |
| * |
| * @param val the DerValue |
| */ |
| public KeyIdentifier(DerValue val) throws IOException { |
| octetString = val.getOctetString(); |
| } |
| |
| /** |
| * Creates a KeyIdentifier from a public-key value. |
| * |
| * <p>From RFC2459: Two common methods for generating key identifiers from |
| * the public key are: |
| * <ol> |
| * <li>The keyIdentifier is composed of the 160-bit SHA-1 hash of the |
| * value of the BIT STRING subjectPublicKey (excluding the tag, |
| * length, and number of unused bits). |
| * <p> |
| * <li>The keyIdentifier is composed of a four bit type field with |
| * the value 0100 followed by the least significant 60 bits of the |
| * SHA-1 hash of the value of the BIT STRING subjectPublicKey. |
| * </ol> |
| * <p>This method supports method 1. |
| * |
| * @param pubKey the public key from which to construct this KeyIdentifier |
| * @throws IOException on parsing errors |
| */ |
| public KeyIdentifier(PublicKey pubKey) |
| throws IOException |
| { |
| DerValue algAndKey = new DerValue(pubKey.getEncoded()); |
| if (algAndKey.tag != DerValue.tag_Sequence) |
| throw new IOException("PublicKey value is not a valid " |
| + "X.509 public key"); |
| |
| AlgorithmId algid = AlgorithmId.parse(algAndKey.data.getDerValue()); |
| byte[] key = algAndKey.data.getUnalignedBitString().toByteArray(); |
| |
| MessageDigest md = null; |
| try { |
| md = MessageDigest.getInstance("SHA1"); |
| } catch (NoSuchAlgorithmException e3) { |
| throw new IOException("SHA1 not supported"); |
| } |
| md.update(key); |
| this.octetString = md.digest(); |
| } |
| |
| /** |
| * Return the value of the KeyIdentifier as byte array. |
| */ |
| public byte[] getIdentifier() { |
| return octetString.clone(); |
| } |
| |
| /** |
| * Returns a printable representation of the KeyUsage. |
| */ |
| public String toString() { |
| String s = "KeyIdentifier [\n"; |
| |
| HexDumpEncoder encoder = new HexDumpEncoder(); |
| s += encoder.encodeBuffer(octetString); |
| s += "]\n"; |
| return (s); |
| } |
| |
| /** |
| * Write the KeyIdentifier to the DerOutputStream. |
| * |
| * @param out the DerOutputStream to write the object to. |
| * @exception IOException |
| */ |
| void encode(DerOutputStream out) throws IOException { |
| out.putOctetString(octetString); |
| } |
| |
| /** |
| * Returns a hash code value for this object. |
| * Objects that are equal will also have the same hashcode. |
| */ |
| public int hashCode () { |
| int retval = 0; |
| for (int i = 0; i < octetString.length; i++) |
| retval += octetString[i] * i; |
| return retval; |
| } |
| |
| /** |
| * Indicates whether some other object is "equal to" this one. |
| */ |
| public boolean equals(Object other) { |
| if (this == other) |
| return true; |
| if (!(other instanceof KeyIdentifier)) |
| return false; |
| return java.util.Arrays.equals(octetString, |
| ((KeyIdentifier)other).getIdentifier()); |
| } |
| } |