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/*
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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. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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/*
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*
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* (C) Copyright IBM Corp. 1999 All Rights Reserved.
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* Copyright 1997 The Open Group Research Institute. All rights reserved.
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*/
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package sun.security.krb5.internal.ccache;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.Hashtable;
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import java.util.Vector;
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import java.util.StringTokenizer;
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import sun.security.krb5.*;
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import sun.security.krb5.internal.*;
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import sun.security.krb5.internal.util.KrbDataInputStream;
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/**
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* This class extends KrbDataInputStream. It is used for parsing FCC-format
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* data from file to memory.
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*
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* @author Yanni Zhang
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*
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*/
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public class CCacheInputStream extends KrbDataInputStream implements FileCCacheConstants {
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/*
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* FCC version 2 contains type information for principals. FCC
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* version 1 does not.
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*
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* FCC version 3 contains keyblock encryption type information, and is
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* architecture independent. Previous versions are not.
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*
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* The code will accept version 1, 2, and 3 ccaches, and depending
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* what KRB5_FCC_DEFAULT_FVNO is set to, it will create version 1, 2,
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* or 3 FCC caches.
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*
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* The default credentials cache should be type 3 for now (see
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* init_ctx.c).
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*/
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/* V4 of the credentials cache format allows for header tags */
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private static boolean DEBUG = Krb5.DEBUG;
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public CCacheInputStream(InputStream is){
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super(is);
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}
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/* Read tag field introduced in KRB5_FCC_FVNO_4 */
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// this needs to be public for Kinit.
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public Tag readTag() throws IOException {
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char[] buf = new char[1024];
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byte[] bytes;
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int len;
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int tag = -1;
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int taglen;
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Integer time_offset = null;
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Integer usec_offset = null;
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len = read(2);
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if (len < 0) {
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throw new IOException("stop.");
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}
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bytes = new byte[len + 2];
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if (len > buf.length) {
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throw new IOException("Invalid tag length.");
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}
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while (len > 0) {
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tag = read(2);
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taglen = read(2);
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switch (tag) {
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case FCC_TAG_DELTATIME:
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time_offset = new Integer(read(4));
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usec_offset = new Integer(read(4));
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break;
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default:
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}
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len = len - (4 + taglen);
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}
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Tag result;
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if (tag == -1) {
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}
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result = new Tag(len, tag, time_offset, usec_offset);
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return result;
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}
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/*
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* In file-based credential cache, the realm name is stored as part of
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* principal name at the first place.
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*/
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// made public for KinitOptions to call directly
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public PrincipalName readPrincipal(int version) throws IOException, RealmException {
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int type, length, namelength, kret;
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PrincipalName p;
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String[] pname = null;
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String realm;
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/* Read principal type */
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if (version == KRB5_FCC_FVNO_1) {
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type = KRB5_NT_UNKNOWN;
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} else {
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type = read(4);
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}
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length = read(4);
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String[] result = new String[length + 1];
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/*
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* DCE includes the principal's realm in the count; the new format
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* does not.
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*/
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if (version == KRB5_FCC_FVNO_1)
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length--;
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for (int i = 0; i <= length; i++) {
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namelength = read(4);
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if (namelength > MAXNAMELENGTH) {
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throw new IOException("Invalid name length in principal name.");
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}
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byte[] bytes = new byte[namelength];
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read(bytes, 0, namelength);
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result[i] = new String(bytes);
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}
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if (isRealm(result[0])) {
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realm = result[0];
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pname = new String[length];
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System.arraycopy(result, 1, pname, 0, length);
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p = new PrincipalName(pname, type);
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p.setRealm(realm);
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}
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else p = new PrincipalName(result, type);
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return p;
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}
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/*
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* In practice, a realm is named by uppercasing the DNS domain name. we currently
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* rely on this to determine if the string within the principal identifier is realm
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* name.
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*
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*/
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boolean isRealm(String str) {
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try {
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Realm r = new Realm(str);
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}
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catch (Exception e) {
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return false;
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}
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StringTokenizer st = new StringTokenizer(str, ".");
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String s;
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while (st.hasMoreTokens()) {
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s = st.nextToken();
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for (int i = 0; i < s.length(); i++) {
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if (s.charAt(i) >= 141) {
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return false;
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}
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}
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}
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return true;
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}
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EncryptionKey readKey(int version) throws IOException {
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int keyType, keyLen;
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keyType = read(2);
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if (version == KRB5_FCC_FVNO_3)
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read(2); /* keytype recorded twice in fvno 3 */
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keyLen = read(4);
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byte[] bytes = new byte[keyLen];
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for (int i = 0; i < keyLen; i++) {
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bytes[i] = (byte)read();
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}
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return new EncryptionKey(bytes, keyType, new Integer(version));
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}
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long[] readTimes() throws IOException {
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long[] times = new long[4];
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times[0] = (long)read(4) * 1000;
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times[1] = (long)read(4) * 1000;
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times[2] = (long)read(4) * 1000;
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times[3] = (long)read(4) * 1000;
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return times;
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}
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boolean readskey() throws IOException {
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if (read() == 0) {
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return false;
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}
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else return true;
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}
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HostAddress[] readAddr() throws IOException, KrbApErrException {
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int numAddrs, addrType, addrLength;
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numAddrs = read(4);
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if (numAddrs > 0) {
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HostAddress[] addrs = new HostAddress[numAddrs];
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for (int i = 0; i < numAddrs; i++) {
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addrType = read(2);
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addrLength = read(4);
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if (!(addrLength == 4 || addrLength == 16)) {
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System.out.println("Incorrect address format.");
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return null;
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}
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byte[] result = new byte[addrLength];
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for (int j = 0; j < addrLength; j++)
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result[j] = (byte)read(1);
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addrs[i] = new HostAddress(addrType, result);
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}
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return addrs;
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}
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return null;
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}
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AuthorizationDataEntry[] readAuth() throws IOException {
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int num, adtype, adlength;
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num = read(4);
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if (num > 0) {
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AuthorizationDataEntry[] auData = new AuthorizationDataEntry[num];
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byte[] data = null;
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for (int i = 0; i < num; i++) {
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adtype = read(2);
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adlength = read(4);
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data = new byte[adlength];
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for (int j = 0; j < adlength; j++) {
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data[j] = (byte)read();
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}
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auData[i] = new AuthorizationDataEntry(adtype, data);
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}
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return auData;
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}
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else return null;
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}
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Ticket readData() throws IOException, RealmException, KrbApErrException, Asn1Exception {
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int length;
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length = read(4);
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if (length > 0) {
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byte[] bytes = new byte[length];
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read(bytes, 0, length);
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Ticket ticket = new Ticket(bytes);
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return ticket;
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}
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else return null;
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}
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boolean[] readFlags() throws IOException {
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boolean[] flags = new boolean[Krb5.TKT_OPTS_MAX+1];
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int ticketFlags;
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ticketFlags = read(4);
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if ((ticketFlags & 0x40000000) == TKT_FLG_FORWARDABLE)
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flags[1] = true;
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if ((ticketFlags & 0x20000000) == TKT_FLG_FORWARDED)
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flags[2] = true;
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if ((ticketFlags & 0x10000000) == TKT_FLG_PROXIABLE)
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flags[3] = true;
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if ((ticketFlags & 0x08000000) == TKT_FLG_PROXY)
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flags[4] = true;
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if ((ticketFlags & 0x04000000) == TKT_FLG_MAY_POSTDATE)
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flags[5] = true;
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if ((ticketFlags & 0x02000000) == TKT_FLG_POSTDATED)
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flags[6] = true;
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if ((ticketFlags & 0x01000000) == TKT_FLG_INVALID)
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flags[7] = true;
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if ((ticketFlags & 0x00800000) == TKT_FLG_RENEWABLE)
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flags[8] = true;
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if ((ticketFlags & 0x00400000) == TKT_FLG_INITIAL)
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flags[9] = true;
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if ((ticketFlags & 0x00200000) == TKT_FLG_PRE_AUTH)
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flags[10] = true;
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if ((ticketFlags & 0x00100000) == TKT_FLG_HW_AUTH)
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flags[11] = true;
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if (DEBUG) {
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String msg = ">>> CCacheInputStream: readFlags() ";
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if (flags[1] == true) {
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msg += " FORWARDABLE;";
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}
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if (flags[2] == true) {
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msg += " FORWARDED;";
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}
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if (flags[3] == true) {
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msg += " PROXIABLE;";
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}
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if (flags[4] == true) {
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msg += " PROXY;";
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}
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if (flags[5] == true) {
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msg += " MAY_POSTDATE;";
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}
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if (flags[6] == true) {
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msg += " POSTDATED;";
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}
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if (flags[7] == true) {
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msg += " INVALID;";
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}
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if (flags[8] == true) {
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msg += " RENEWABLE;";
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}
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if (flags[9] == true) {
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msg += " INITIAL;";
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}
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if (flags[10] == true) {
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msg += " PRE_AUTH;";
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}
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if (flags[11] == true) {
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msg += " HW_AUTH;";
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}
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System.out.println(msg);
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}
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return flags;
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}
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Credentials readCred(int version) throws IOException,RealmException, KrbApErrException, Asn1Exception {
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PrincipalName cpname = readPrincipal(version);
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if (DEBUG)
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System.out.println(">>>DEBUG <CCacheInputStream> client principal is " + cpname.toString());
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PrincipalName spname = readPrincipal(version);
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if (DEBUG)
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System.out.println(">>>DEBUG <CCacheInputStream> server principal is " + spname.toString());
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EncryptionKey key = readKey(version);
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if (DEBUG)
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System.out.println(">>>DEBUG <CCacheInputStream> key type: " + key.getEType());
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long times[] = readTimes();
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KerberosTime authtime = new KerberosTime(times[0]);
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KerberosTime starttime = new KerberosTime(times[1]);
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KerberosTime endtime = new KerberosTime(times[2]);
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KerberosTime renewTill = new KerberosTime(times[3]);
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if (DEBUG) {
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System.out.println(">>>DEBUG <CCacheInputStream> auth time: " + authtime.toDate().toString());
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System.out.println(">>>DEBUG <CCacheInputStream> start time: " + starttime.toDate().toString());
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System.out.println(">>>DEBUG <CCacheInputStream> end time: " + endtime.toDate().toString());
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System.out.println(">>>DEBUG <CCacheInputStream> renew_till time: " + renewTill.toDate().toString());
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}
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boolean skey = readskey();
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boolean flags[] = readFlags();
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TicketFlags tFlags = new TicketFlags(flags);
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HostAddress addr[] = readAddr();
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HostAddresses addrs = null;
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if (addr != null) {
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addrs = new HostAddresses(addr);
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}
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AuthorizationDataEntry[] auDataEntry = readAuth();
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AuthorizationData auData = null;
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if (auData != null) {
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auData = new AuthorizationData(auDataEntry);
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}
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Ticket ticket = readData();
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if (DEBUG) {
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System.out.println(">>>DEBUG <CCacheInputStream>");
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if (ticket == null) {
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System.out.println("///ticket is null");
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}
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}
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Ticket secTicket = readData();
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Credentials cred = new Credentials(cpname, spname, key, authtime, starttime,
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endtime, renewTill, skey, tFlags,
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addrs, auData, ticket, secTicket);
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return cred;
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}
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}
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