| /* |
| * Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2017, 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. |
| */ |
| |
| /* |
| * |
| * (C) Copyright IBM Corp. 1999 All Rights Reserved. |
| * Copyright 1997 The Open Group Research Institute. All rights reserved. |
| */ |
| |
| package sun.security.krb5.internal; |
| |
| import sun.security.krb5.internal.crypto.EType; |
| import sun.security.util.*; |
| import sun.security.krb5.Asn1Exception; |
| import java.io.IOException; |
| import java.util.Vector; |
| |
| import sun.security.krb5.internal.util.KerberosString; |
| |
| /** |
| * Implements the ASN.1 PA-DATA type. |
| * |
| * <xmp> |
| * PA-DATA ::= SEQUENCE { |
| * -- NOTE: first tag is [1], not [0] |
| * padata-type [1] Int32, |
| * padata-value [2] OCTET STRING -- might be encoded AP-REQ |
| * } |
| * </xmp> |
| * |
| * <p> |
| * This definition reflects the Network Working Group RFC 4120 |
| * specification available at |
| * <a href="http://www.ietf.org/rfc/rfc4120.txt"> |
| * http://www.ietf.org/rfc/rfc4120.txt</a>. |
| */ |
| |
| public class PAData { |
| private int pADataType; |
| private byte[] pADataValue = null; |
| private static final byte TAG_PATYPE = 1; |
| private static final byte TAG_PAVALUE = 2; |
| |
| private PAData() { |
| } |
| |
| public PAData(int new_pADataType, byte[] new_pADataValue) { |
| pADataType = new_pADataType; |
| if (new_pADataValue != null) { |
| pADataValue = new_pADataValue.clone(); |
| } |
| } |
| |
| public Object clone() { |
| PAData new_pAData = new PAData(); |
| new_pAData.pADataType = pADataType; |
| if (pADataValue != null) { |
| new_pAData.pADataValue = new byte[pADataValue.length]; |
| System.arraycopy(pADataValue, 0, new_pAData.pADataValue, |
| 0, pADataValue.length); |
| } |
| return new_pAData; |
| } |
| |
| /** |
| * Constructs a PAData object. |
| * @param encoding a Der-encoded data. |
| * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. |
| * @exception IOException if an I/O error occurs while reading encoded data. |
| */ |
| public PAData(DerValue encoding) throws Asn1Exception, IOException { |
| DerValue der = null; |
| if (encoding.getTag() != DerValue.tag_Sequence) { |
| throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| } |
| der = encoding.getData().getDerValue(); |
| if ((der.getTag() & 0x1F) == 0x01) { |
| this.pADataType = der.getData().getBigInteger().intValue(); |
| } |
| else |
| throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| der = encoding.getData().getDerValue(); |
| if ((der.getTag() & 0x1F) == 0x02) { |
| this.pADataValue = der.getData().getOctetString(); |
| } |
| if (encoding.getData().available() > 0) |
| throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| } |
| |
| /** |
| * Encodes this object to an OutputStream. |
| * |
| * @return byte array of the encoded data. |
| * @exception IOException if an I/O error occurs while reading encoded data. |
| * @exception Asn1Exception on encoding errors. |
| */ |
| public byte[] asn1Encode() throws Asn1Exception, IOException { |
| |
| DerOutputStream bytes = new DerOutputStream(); |
| DerOutputStream temp = new DerOutputStream(); |
| |
| temp.putInteger(pADataType); |
| bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, TAG_PATYPE), temp); |
| temp = new DerOutputStream(); |
| temp.putOctetString(pADataValue); |
| bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, TAG_PAVALUE), temp); |
| |
| temp = new DerOutputStream(); |
| temp.write(DerValue.tag_Sequence, bytes); |
| return temp.toByteArray(); |
| } |
| |
| // accessor methods |
| public int getType() { |
| return pADataType; |
| } |
| |
| public byte[] getValue() { |
| return ((pADataValue == null) ? null : pADataValue.clone()); |
| } |
| |
| /** |
| * Parse (unmarshal) a PAData from a DER input stream. This form |
| * parsing might be used when expanding a value which is part of |
| * a constructed sequence and uses explicitly tagged type. |
| * |
| * @exception Asn1Exception if an Asn1Exception occurs. |
| * @param data the Der input stream value, which contains one or more |
| * marshaled values. |
| * @param explicitTag tag number. |
| * @param optional indicates if this data field is optional. |
| * @return an array of PAData. |
| */ |
| public static PAData[] parseSequence(DerInputStream data, |
| byte explicitTag, boolean optional) |
| throws Asn1Exception, IOException { |
| if ((optional) && |
| (((byte)data.peekByte() & (byte)0x1F) != explicitTag)) |
| return null; |
| DerValue subDer = data.getDerValue(); |
| DerValue subsubDer = subDer.getData().getDerValue(); |
| if (subsubDer.getTag() != DerValue.tag_SequenceOf) { |
| throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| } |
| Vector<PAData> v = new Vector<>(); |
| while (subsubDer.getData().available() > 0) { |
| v.addElement(new PAData(subsubDer.getData().getDerValue())); |
| } |
| if (v.size() > 0) { |
| PAData[] pas = new PAData[v.size()]; |
| v.copyInto(pas); |
| return pas; |
| } |
| return null; |
| } |
| |
| /** |
| * Gets the preferred etype from the PAData array. |
| * 1. ETYPE-INFO2-ENTRY with unknown s2kparams ignored |
| * 2. ETYPE-INFO2 preferred to ETYPE-INFO |
| * 3. multiple entries for same etype in one PA-DATA, use the first one. |
| * 4. Multiple PA-DATA with same type, choose the last one |
| * (This is useful when PA-DATAs from KRB-ERROR and AS-REP are combined). |
| * @return the etype, or defaultEType if not enough info |
| * @throws Asn1Exception|IOException if there is an encoding error |
| */ |
| public static int getPreferredEType(PAData[] pas, int defaultEType) |
| throws IOException, Asn1Exception { |
| |
| if (pas == null) return defaultEType; |
| |
| DerValue d = null, d2 = null; |
| for (PAData p: pas) { |
| if (p.getValue() == null) continue; |
| switch (p.getType()) { |
| case Krb5.PA_ETYPE_INFO: |
| d = new DerValue(p.getValue()); |
| break; |
| case Krb5.PA_ETYPE_INFO2: |
| d2 = new DerValue(p.getValue()); |
| break; |
| } |
| } |
| if (d2 != null) { |
| while (d2.data.available() > 0) { |
| DerValue value = d2.data.getDerValue(); |
| ETypeInfo2 tmp = new ETypeInfo2(value); |
| if (EType.isNewer(tmp.getEType()) || tmp.getParams() == null) { |
| // we don't support non-null s2kparams for old etypes |
| return tmp.getEType(); |
| } |
| } |
| } |
| if (d != null) { |
| while (d.data.available() > 0) { |
| DerValue value = d.data.getDerValue(); |
| ETypeInfo tmp = new ETypeInfo(value); |
| return tmp.getEType(); |
| } |
| } |
| return defaultEType; |
| } |
| |
| /** |
| * A place to store a pair of salt and s2kparams. |
| * An empty salt is changed to null, to be interoperable |
| * with Windows 2000 server. This is in fact not correct. |
| */ |
| public static class SaltAndParams { |
| public final String salt; |
| public final byte[] params; |
| public SaltAndParams(String s, byte[] p) { |
| if (s != null && s.isEmpty()) s = null; |
| this.salt = s; |
| this.params = p; |
| } |
| } |
| |
| /** |
| * Fetches salt and s2kparams value for eType in a series of PA-DATAs. |
| * 1. ETYPE-INFO2-ENTRY with unknown s2kparams ignored |
| * 2. PA-ETYPE-INFO2 preferred to PA-ETYPE-INFO preferred to PA-PW-SALT. |
| * 3. multiple entries for same etype in one PA-DATA, use the first one. |
| * 4. Multiple PA-DATA with same type, choose the last one |
| * (This is useful when PA-DATAs from KRB-ERROR and AS-REP are combined). |
| * @return salt and s2kparams. can be null if not found |
| */ |
| public static SaltAndParams getSaltAndParams(int eType, PAData[] pas) |
| throws Asn1Exception, IOException { |
| |
| if (pas == null) return null; |
| |
| DerValue d = null, d2 = null; |
| String paPwSalt = null; |
| |
| for (PAData p: pas) { |
| if (p.getValue() == null) continue; |
| switch (p.getType()) { |
| case Krb5.PA_PW_SALT: |
| paPwSalt = new String(p.getValue(), |
| KerberosString.MSNAME?"UTF8":"8859_1"); |
| break; |
| case Krb5.PA_ETYPE_INFO: |
| d = new DerValue(p.getValue()); |
| break; |
| case Krb5.PA_ETYPE_INFO2: |
| d2 = new DerValue(p.getValue()); |
| break; |
| } |
| } |
| if (d2 != null) { |
| while (d2.data.available() > 0) { |
| DerValue value = d2.data.getDerValue(); |
| ETypeInfo2 tmp = new ETypeInfo2(value); |
| if (tmp.getEType() == eType && |
| (EType.isNewer(eType) || tmp.getParams() == null)) { |
| // we don't support non-null s2kparams for old etypes |
| return new SaltAndParams(tmp.getSalt(), tmp.getParams()); |
| } |
| } |
| } |
| if (d != null) { |
| while (d.data.available() > 0) { |
| DerValue value = d.data.getDerValue(); |
| ETypeInfo tmp = new ETypeInfo(value); |
| if (tmp.getEType() == eType) { |
| return new SaltAndParams(tmp.getSalt(), null); |
| } |
| } |
| } |
| if (paPwSalt != null) { |
| return new SaltAndParams(paPwSalt, null); |
| } |
| return null; |
| } |
| |
| @Override |
| public String toString(){ |
| StringBuilder sb = new StringBuilder(); |
| sb.append(">>>Pre-Authentication Data:\n\t PA-DATA type = ") |
| .append(pADataType).append('\n'); |
| |
| switch(pADataType) { |
| case Krb5.PA_ENC_TIMESTAMP: |
| sb.append("\t PA-ENC-TIMESTAMP"); |
| break; |
| case Krb5.PA_ETYPE_INFO: |
| if (pADataValue != null) { |
| try { |
| DerValue der = new DerValue(pADataValue); |
| while (der.data.available() > 0) { |
| DerValue value = der.data.getDerValue(); |
| ETypeInfo info = new ETypeInfo(value); |
| sb.append("\t PA-ETYPE-INFO etype = ") |
| .append(info.getEType()) |
| .append(", salt = ") |
| .append(info.getSalt()) |
| .append('\n'); |
| } |
| } catch (IOException|Asn1Exception e) { |
| sb.append("\t <Unparseable PA-ETYPE-INFO>\n"); |
| } |
| } |
| break; |
| case Krb5.PA_ETYPE_INFO2: |
| if (pADataValue != null) { |
| try { |
| DerValue der = new DerValue(pADataValue); |
| while (der.data.available() > 0) { |
| DerValue value = der.data.getDerValue(); |
| ETypeInfo2 info2 = new ETypeInfo2(value); |
| sb.append("\t PA-ETYPE-INFO2 etype = ") |
| .append(info2.getEType()) |
| .append(", salt = ") |
| .append(info2.getSalt()) |
| .append(", s2kparams = "); |
| byte[] s2kparams = info2.getParams(); |
| if (s2kparams == null) { |
| sb.append("null\n"); |
| } else if (s2kparams.length == 0) { |
| sb.append("empty\n"); |
| } else { |
| sb.append(new sun.misc.HexDumpEncoder() |
| .encodeBuffer(s2kparams)); |
| } |
| } |
| } catch (IOException|Asn1Exception e) { |
| sb.append("\t <Unparseable PA-ETYPE-INFO>\n"); |
| } |
| } |
| break; |
| case Krb5.PA_FOR_USER: |
| sb.append("\t PA-FOR-USER\n"); |
| break; |
| default: |
| // Unknown Pre-auth type |
| break; |
| } |
| return sb.toString(); |
| } |
| } |
