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1 /* |
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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3 * |
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4 * This code is free software; you can redistribute it and/or modify it |
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5 * under the terms of the GNU General Public License version 2 only, as |
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6 * published by the Free Software Foundation. Sun designates this |
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7 * particular file as subject to the "Classpath" exception as provided |
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8 * by Sun in the LICENSE file that accompanied this code. |
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9 * |
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10 * This code is distributed in the hope that it will be useful, but WITHOUT |
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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13 * version 2 for more details (a copy is included in the LICENSE file that |
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14 * accompanied this code). |
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15 * |
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16 * You should have received a copy of the GNU General Public License version |
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17 * 2 along with this work; if not, write to the Free Software Foundation, |
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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19 * |
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20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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21 * CA 95054 USA or visit www.sun.com if you need additional information or |
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22 * have any questions. |
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23 */ |
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24 |
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25 /* |
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26 * |
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27 * (C) Copyright IBM Corp. 1999 All Rights Reserved. |
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28 * Copyright 1997 The Open Group Research Institute. All rights reserved. |
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29 */ |
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30 |
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31 package sun.security.krb5.internal; |
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32 |
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33 import sun.security.krb5.Checksum; |
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34 import sun.security.krb5.Asn1Exception; |
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35 import sun.security.krb5.RealmException; |
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36 import sun.security.util.*; |
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37 import java.io.IOException; |
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38 import java.math.BigInteger; |
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39 |
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40 /** |
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41 * Implements the ASN.1 KRBSafe type. |
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42 * |
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43 * <xmp> |
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44 * KRB-SAFE ::= [APPLICATION 20] SEQUENCE { |
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45 * pvno [0] INTEGER (5), |
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46 * msg-type [1] INTEGER (20), |
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47 * safe-body [2] KRB-SAFE-BODY, |
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48 * cksum [3] Checksum |
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49 * } |
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50 * </xmp> |
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51 * |
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52 * <p> |
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53 * This definition reflects the Network Working Group RFC 4120 |
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54 * specifications available at |
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55 * <a href="http://www.ietf.org/rfc/rfc4120.txt"> |
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56 * http://www.ietf.org/rfc/rfc4120.txt</a>. |
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57 */ |
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58 |
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59 public class KRBSafe { |
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60 public int pvno; |
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61 public int msgType; |
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62 public KRBSafeBody safeBody; |
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63 public Checksum cksum; |
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64 |
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65 public KRBSafe(KRBSafeBody new_safeBody, Checksum new_cksum) { |
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66 pvno = Krb5.PVNO; |
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67 msgType = Krb5.KRB_SAFE; |
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68 safeBody = new_safeBody; |
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69 cksum = new_cksum; |
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70 } |
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71 |
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72 public KRBSafe(byte[] data) throws Asn1Exception, |
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73 RealmException, KrbApErrException, IOException { |
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74 init(new DerValue(data)); |
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75 } |
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76 |
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77 public KRBSafe(DerValue encoding) throws Asn1Exception, |
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78 RealmException, KrbApErrException, IOException { |
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79 init(encoding); |
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80 } |
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81 |
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82 /** |
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83 * Initializes an KRBSafe object. |
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84 * @param encoding a single DER-encoded value. |
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85 * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. |
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86 * @exception IOException if an I/O error occurs while reading encoded data. |
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87 * @exception RealmException if an error occurs while parsing a Realm object. |
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88 * @exception KrbApErrException if the value read from the DER-encoded data |
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89 * stream does not match the pre-defined value. |
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90 */ |
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91 private void init(DerValue encoding) throws Asn1Exception, |
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92 RealmException, KrbApErrException, IOException { |
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93 DerValue der, subDer; |
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94 if (((encoding.getTag() & (byte)0x1F) != (byte)0x14) |
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95 || (encoding.isApplication() != true) |
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96 || (encoding.isConstructed() != true)) |
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97 throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
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98 der = encoding.getData().getDerValue(); |
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99 if (der.getTag() != DerValue.tag_Sequence) |
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100 throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
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101 subDer = der.getData().getDerValue(); |
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102 if ((subDer.getTag() & 0x1F) == 0x00) { |
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103 pvno = subDer.getData().getBigInteger().intValue(); |
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104 if (pvno != Krb5.PVNO) |
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105 throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION); |
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106 } |
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107 else |
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108 throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
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109 subDer = der.getData().getDerValue(); |
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110 if ((subDer.getTag() & 0x1F) == 0x01) { |
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111 msgType = subDer.getData().getBigInteger().intValue(); |
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112 if (msgType != Krb5.KRB_SAFE) |
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113 throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE); |
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114 } |
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115 |
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116 else |
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117 throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
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118 safeBody = KRBSafeBody.parse(der.getData(), (byte)0x02, false); |
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119 cksum = Checksum.parse(der.getData(), (byte)0x03, false); |
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120 if (der.getData().available() > 0) |
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121 throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
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122 } |
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123 |
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124 /** |
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125 * Encodes an KRBSafe object. |
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126 * @return byte array of encoded KRBSafe object. |
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127 * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. |
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128 * @exception IOException if an I/O error occurs while reading encoded data. |
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129 */ |
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130 public byte[] asn1Encode() throws Asn1Exception, IOException { |
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131 DerOutputStream temp = new DerOutputStream(); |
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132 DerOutputStream bytes = new DerOutputStream(); |
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133 temp.putInteger(BigInteger.valueOf(pvno)); |
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134 bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp); |
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135 temp = new DerOutputStream(); |
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136 temp.putInteger(BigInteger.valueOf(msgType)); |
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137 bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp); |
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138 bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x02), safeBody.asn1Encode()); |
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139 bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), cksum.asn1Encode()); |
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140 temp = new DerOutputStream(); |
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141 temp.write(DerValue.tag_Sequence, bytes); |
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142 bytes = new DerOutputStream(); |
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143 bytes.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte)0x14), temp); |
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144 return bytes.toByteArray(); |
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145 } |
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146 } |