PKIMessage


1   // CMP implementation copyright (c) 2003 NOVOSEC AG (http://www.novosec.com)
2   //
3   // Author: Maik Stohn
4   //
5   // Permission is hereby granted, free of charge, to any person obtaining a copy of this 
6   // software and associated documentation files (the "Software"), to deal in the Software 
7   // without restriction, including without limitation the rights to use, copy, modify, merge, 
8   // publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons 
9   // to whom the Software is furnished to do so, subject to the following conditions: 
10  //
11  // The above copyright notice and this permission notice shall be included in all copies or 
12  // substantial portions of the Software. 
13  //
14  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
15  // BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
16  // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
17  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
19  
20  package com.novosec.pkix.asn1.cmp;
21  
22  import java.util.Vector  ;
23  import java.util.Enumeration  ;
24  
25  import java.io.ByteArrayOutputStream  ;
26  
27  import org.bouncycastle.asn1.*;
28  import org.bouncycastle.asn1.x509.*;
29  
30  /**
31   * ASN.1 structure DER En/DeCoder.
32   *
33   * <pre>
34   *  PKIMessage ::= SEQUENCE {
35   *      header           PKIMessage,
36   *      body             PKIBody,
37   *      protection   [0] PKIProtection OPTIONAL,                        -- (BIT STRING)
38   *      extraCerts   [1] SEQUENCE SIZE (1..MAX) OF Certificate OPTIONAL
39   *  }
40   *
41   * </pre>
42   */
43  public class PKIMessage implements DEREncodable
44  {
45      PKIHeader      header;
46      PKIBody        body;
47      DERBitString   protection;
48      Vector           extraCerts = new Vector  ();
49      byte           protectedBytes[];
50  
51      public static PKIMessage getInstance( ASN1TaggedObject obj, boolean explicit )
52      {
53          return getInstance(ASN1Sequence.getInstance(obj, explicit));
54      }
55  
56      public static PKIMessage getInstance( Object   obj )
57      {
58          if (obj instanceof PKIMessage)
59          {
60              return (PKIMessage)obj;
61          }
62          else if (obj instanceof ASN1Sequence)
63          {
64              return new PKIMessage((ASN1Sequence)obj);
65          }
66  
67          throw new IllegalArgumentException  ("unknown object in factory");
68      }
69    
70      public PKIMessage( ASN1Sequence seq )
71      {
72        Enumeration   e = seq.getObjects();
73        
74  /*
75        header     = PKIHeader.getInstance( e.nextElement() );
76        body       = PKIBody.getInstance( (ASN1TaggedObject)e.nextElement() );
77  */
78  
79        DEREncodable derHeader = (DEREncodable)e.nextElement();
80        DEREncodable derBody   = (DEREncodable)e.nextElement();
81        
82        try
83        {
84          //store protected part in unmodified form...
85          ASN1EncodableVector v = new ASN1EncodableVector();
86          v.add( derHeader );
87          v.add( derBody );
88          
89          ByteArrayOutputStream   bao = new ByteArrayOutputStream  ();
90          DEROutputStream out = new DEROutputStream( bao );
91          out.writeObject( new DERSequence(v) );
92        
93          protectedBytes = bao.toByteArray();
94        }
95        catch( Exception   ex ) {}
96           
97        header     = PKIHeader.getInstance( derHeader );
98        body       = PKIBody.getInstance( (ASN1TaggedObject)derBody );
99        
100       while (e.hasMoreElements())
101       {
102         ASN1TaggedObject tagObj = (ASN1TaggedObject)e.nextElement();
103 
104         switch (tagObj.getTagNo())
105         {
106           case 0: protection = DERBitString.getInstance( tagObj.getObject() ); break;
107           case 1: 
108             ASN1Sequence s = (ASN1Sequence)tagObj.getObject();
109             for( int i=0; i<s.size(); i++ )
110               extraCerts.addElement( X509CertificateStructure.getInstance(s.getObjectAt(i)) );
111             break;
112         }
113       }
114     }
115 
116     public PKIMessage( PKIHeader header, PKIBody body )
117     {
118         this.header = header;
119         this.body = body;
120     }
121 
122     public PKIHeader getHeader()
123     {
124         return header;
125     }
126 
127     public PKIBody getBody()
128     {
129         return body;
130     }
131     
132     public void setProtection( DERBitString protection )
133     {
134       this.protection = protection;
135     }
136 
137     public DERBitString getProtection()
138     {
139       return protection;
140     }
141 
142     public void addExtraCert( X509CertificateStructure extraCert )
143     {
144       this.extraCerts.addElement(extraCert);
145     }
146 
147     public X509CertificateStructure getExtraCert(int nr)
148     {
149       if (extraCerts.size() > nr)
150         return (X509CertificateStructure)extraCerts.elementAt(nr);
151 
152       return null;
153     }
154 
155     public DERObject getDERObject()
156     {
157       ASN1EncodableVector  v = new ASN1EncodableVector();
158 
159       v.add( header );
160       v.add( body );
161       
162       if( protection != null )
163         v.add( new DERTaggedObject( true, 0, protection ) );
164 
165       if( extraCerts.size() > 0 )
166       {
167         ASN1EncodableVector giv = new ASN1EncodableVector();
168   
169         for (int i=0;i<extraCerts.size();i++)
170           giv.add((X509CertificateStructure)extraCerts.elementAt(i));
171   
172         v.add( new DERTaggedObject( true, 1, new DERSequence(giv) ) );
173       }
174       
175       return new DERSequence(v);
176     }
177     
178     public byte[] getProtectedBytes()
179     {
180       if( protectedBytes != null )
181         return protectedBytes;
182 
183       try
184       {
185         ByteArrayOutputStream   bao = new ByteArrayOutputStream  ();
186         DEROutputStream out = new DEROutputStream( bao );
187         out.writeObject( getProtectedPart() );
188         return bao.toByteArray();
189       }
190       catch(Exception   ex){}
191       
192       return null;
193     }
194     
195     public ProtectedPart getProtectedPart()
196     {
197       return new ProtectedPart( header, body );
198     }
199 
200     public String   toString()
201     {
202       String   s = "PKIMessage: ( header: " + this.getHeader() + ", body: " + this.getBody() + ", ";
203 
204       if( this.getProtection() != null )
205         s += "protection: "+ this.getProtection() + ", ";
206       
207       if( extraCerts.size() > 0 )
208       {
209         s += "extraCerts: (";
210         for (int i=0;i<extraCerts.size();i++)
211           s += extraCerts.elementAt(i) + ", ";
212         s += ")";
213       }        
214 
215       s += ")";
216       
217       return s;
218     }
219 }
220
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