src/java.security.jgss/share/classes/sun/security/krb5/internal/PAForUserEnc.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.security.jgss/share/classes/sun/security/krb5/internal/PAForUserEnc.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,190 @@
+/*
+ * Copyright (c) 2012, 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.krb5.internal;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import sun.security.krb5.*;
+import sun.security.krb5.internal.crypto.KeyUsage;
+import sun.security.krb5.internal.util.KerberosString;
+import sun.security.util.DerOutputStream;
+import sun.security.util.DerValue;
+
+/**
+ * Implements the ASN.1 PA-FOR-USER type.
+ *
+ * <pre>{@code
+ * padata-type ::= PA-FOR-USER
+ * -- value 129
+ * padata-value ::= EncryptedData
+ * -- PA-FOR-USER-ENC
+ * PA-FOR-USER-ENC ::= SEQUENCE {
+ * userName[0] PrincipalName,
+ * userRealm[1] Realm,
+ * cksum[2] Checksum,
+ * auth-package[3] KerberosString
+ * }
+ * }</pre>
+ *
+ * <p>
+ * This definition reflects MS-SFU.
+ */
+
+public class PAForUserEnc {
+ final public PrincipalName name;
+ final private EncryptionKey key;
+ final public static String AUTH_PACKAGE = "Kerberos";
+
+ public PAForUserEnc(PrincipalName name, EncryptionKey key) {
+ this.name = name;
+ this.key = key;
+ }
+
+ /**
+ * Constructs a PA-FOR-USER object from a DER encoding.
+ * @param encoding the input object
+ * @param key the key to verify the checksum inside encoding
+ * @throws KrbException if the verification fails.
+ * Note: this method is now only used by test KDC, therefore
+ * the verification is ignored (at the moment).
+ */
+ public PAForUserEnc(DerValue encoding, EncryptionKey key)
+ throws Asn1Exception, KrbException, IOException {
+ DerValue der = null;
+ this.key = key;
+
+ if (encoding.getTag() != DerValue.tag_Sequence) {
+ throw new Asn1Exception(Krb5.ASN1_BAD_ID);
+ }
+
+ // Realm after name? Quite abnormal.
+ PrincipalName tmpName = null;
+ der = encoding.getData().getDerValue();
+ if ((der.getTag() & 0x1F) == 0x00) {
+ try {
+ tmpName = new PrincipalName(der.getData().getDerValue(),
+ new Realm("PLACEHOLDER"));
+ } catch (RealmException re) {
+ // Impossible
+ }
+ } else {
+ throw new Asn1Exception(Krb5.ASN1_BAD_ID);
+ }
+
+ der = encoding.getData().getDerValue();
+ if ((der.getTag() & 0x1F) == 0x01) {
+ try {
+ Realm realm = new Realm(der.getData().getDerValue());
+ name = new PrincipalName(
+ tmpName.getNameType(), tmpName.getNameStrings(), realm);
+ } catch (RealmException re) {
+ throw new IOException(re);
+ }
+ } else {
+ throw new Asn1Exception(Krb5.ASN1_BAD_ID);
+ }
+
+ der = encoding.getData().getDerValue();
+ if ((der.getTag() & 0x1F) == 0x02) {
+ // Deal with the checksum
+ } else {
+ throw new Asn1Exception(Krb5.ASN1_BAD_ID);
+ }
+
+ der = encoding.getData().getDerValue();
+ if ((der.getTag() & 0x1F) == 0x03) {
+ String authPackage = new KerberosString(der.getData().getDerValue()).toString();
+ if (!authPackage.equalsIgnoreCase(AUTH_PACKAGE)) {
+ throw new IOException("Incorrect auth-package");
+ }
+ } else {
+ throw new Asn1Exception(Krb5.ASN1_BAD_ID);
+ }
+ if (encoding.getData().available() > 0)
+ throw new Asn1Exception(Krb5.ASN1_BAD_ID);
+ }
+
+ public byte[] asn1Encode() throws Asn1Exception, IOException {
+ DerOutputStream bytes = new DerOutputStream();
+ bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), name.asn1Encode());
+ bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), name.getRealm().asn1Encode());
+
+ try {
+ Checksum cks = new Checksum(
+ Checksum.CKSUMTYPE_HMAC_MD5_ARCFOUR,
+ getS4UByteArray(),
+ key,
+ KeyUsage.KU_PA_FOR_USER_ENC_CKSUM);
+ bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x02), cks.asn1Encode());
+ } catch (KrbException ke) {
+ throw new IOException(ke);
+ }
+
+ DerOutputStream temp = new DerOutputStream();
+ temp.putDerValue(new KerberosString(AUTH_PACKAGE).toDerValue());
+ bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), temp);
+
+ temp = new DerOutputStream();
+ temp.write(DerValue.tag_Sequence, bytes);
+ return temp.toByteArray();
+ }
+
+ /**
+ * Returns S4UByteArray, the block to calculate checksum inside a
+ * PA-FOR-USER-ENC data structure. It includes:
+ * 1. userName.name-type encoded as a 4-byte integer in little endian
+ * byte order
+ * 2. all string values in the sequence of strings contained in the
+ * userName.name-string field
+ * 3. the string value of the userRealm field
+ * 4. the string value of auth-package field
+ */
+ public byte[] getS4UByteArray() {
+ try {
+ ByteArrayOutputStream ba = new ByteArrayOutputStream();
+ ba.write(new byte[4]);
+ for (String s: name.getNameStrings()) {
+ ba.write(s.getBytes("UTF-8"));
+ }
+ ba.write(name.getRealm().toString().getBytes("UTF-8"));
+ ba.write(AUTH_PACKAGE.getBytes("UTF-8"));
+ byte[] output = ba.toByteArray();
+ int pnType = name.getNameType();
+ output[0] = (byte)(pnType & 0xff);
+ output[1] = (byte)((pnType>>8) & 0xff);
+ output[2] = (byte)((pnType>>16) & 0xff);
+ output[3] = (byte)((pnType>>24) & 0xff);
+ return output;
+ } catch (IOException ioe) {
+ // not possible
+ throw new AssertionError("Cannot write ByteArrayOutputStream", ioe);
+ }
+ }
+
+ public String toString() {
+ return "PA-FOR-USER: " + name;
+ }
+}