NameConstraints


1   
2   package com.ca.commons.security.cert.extensions;
3   
4   import com.ca.commons.security.asn1.*;
5   
6   /**
7    * <pre>
8    * NameConstraints ::= SEQUENCE {
9    *      permittedSubtrees       [0]     GeneralSubtrees OPTIONAL,
10   *      excludedSubtrees        [1]     GeneralSubtrees OPTIONAL }
11   *
12   * GeneralSubtrees ::= SEQUENCE SIZE (1..MAX) OF GeneralSubtree
13   *
14   * GeneralSubtree ::= SEQUENCE {
15   *      base                    GeneralName,
16   *      minimum         [0]     BaseDistance DEFAULT 0,
17   *      maximum         [1]     BaseDistance OPTIONAL }
18   *
19   * BaseDistance ::= INTEGER (0..MAX)
20   * </pre>
21   *
22   * @author vbui
23   */
24  public class NameConstraints implements V3Extension
25  {
26      String   value = null;
27  
28      public void init(ASN1Object asn1object) throws Exception  
29      {
30          if (!asn1object.isASN1Type(ASN1Type.SEQUENCE))
31              throw new Exception  ("Wrong ASN.1 type for NameConstraints");
32  
33          if (asn1object.size() >= 1)
34          {
35              value = "permittedSubtrees: " + getSubtrees(asn1object.getComponent(0));
36          }
37  
38          if (asn1object.size() >= 2)
39          {
40              value = value + "\nexcludedSubtrees: " + getSubtrees(asn1object.getComponent(0));
41          }
42      }
43  
44      public String   getSubtrees(ASN1Object obj)
45      {
46          StringBuffer   buff = new StringBuffer  ();
47  
48          for (int i = 0; i < obj.size(); i++)
49          {
50              buff.append("\n  generalSubtree");
51              ASN1Object gsubtree = obj.getComponent(i);
52              if (gsubtree.size() >= 1)
53              {
54                  buff.append("\n\tbase: " + IssuerAltName.getGNameString(gsubtree.getComponent(0)));
55              }
56              if (gsubtree.size() >= 2)
57              {
58                  buff.append("\n\tminimum: " + gsubtree.getComponent(1).getValue());
59              }
60              if (gsubtree.size() >= 3)
61              {
62                  buff.append("\n\tmaximum: " + gsubtree.getComponent(2).getValue());
63              }
64          }
65  
66          return buff.toString();
67      }
68  
69      public String   toString()
70      {
71          return value;
72      }
73  }
74  
75
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