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SMIMECapabilities.java
资源名称：security.rar　[点击查看]
上传用户：lior1029
上传日期：2013-05-07
资源大小：209k
文件大小：3k
源码类别：

CA认证

开发平台：

Java

SMIMECapabilities.java：源码内容
  1. package org.bouncycastle.asn1.smime;
  3. import java.util.Vector;
  4. import java.util.Enumeration;
  6. import org.bouncycastle.asn1.ASN1Sequence;
  7. import org.bouncycastle.asn1.DERObjectIdentifier;
  8. import org.bouncycastle.asn1.DERObject;
  9. import org.bouncycastle.asn1.DEREncodable;
  11. import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
  13. import org.bouncycastle.asn1.cms.Attribute;
  15. /**
  16.  * Handler class for dealing with S/MIME Capabilities
  17.  */
  18. public class SMIMECapabilities
  19.     implements DEREncodable
  20. {
  21.     /**
  22.      * general preferences
  23.      */
  24.     public static final DERObjectIdentifier preferSignedData = PKCSObjectIdentifiers.preferSignedData;
  25.     public static final DERObjectIdentifier canNotDecryptAny = PKCSObjectIdentifiers.canNotDecryptAny;
  26.     public static final DERObjectIdentifier sMIMECapabilitesVersions = PKCSObjectIdentifiers.sMIMECapabilitiesVersions;
  28.     /**
  29.      * encryption algorithms preferences
  30.      */
  31.     public static final DERObjectIdentifier dES_CBC = new DERObjectIdentifier("1.3.14.3.2.7");
  32.     public static final DERObjectIdentifier dES_EDE3_CBC = PKCSObjectIdentifiers.des_EDE3_CBC;
  33.     public static final DERObjectIdentifier rC2_CBC = PKCSObjectIdentifiers.RC2_CBC;
  35. private ASN1Sequence         capabilities;
  37.     /**
  38.      * return an Attribute object from the given object.
  39.      *
  40.      * @param o the object we want converted.
  41.      * @exception IllegalArgumentException if the object cannot be converted.
  42.      */
  43. public static SMIMECapabilities getInstance(
  44.         Object o)
  45.     {
  46. if (o == null || o instanceof SMIMECapabilities)
  47.         {
  48. return (SMIMECapabilities)o;
  49. }
  51. if (o instanceof ASN1Sequence)
  52.         {
  53. return new SMIMECapabilities((ASN1Sequence)o);
  54. }
  56. if (o instanceof Attribute)
  57.         {
  58. return new SMIMECapabilities(
  59.                 (ASN1Sequence)(((Attribute)o).getAttrValues().getObjectAt(0)));
  60. }
  62.         throw new IllegalArgumentException("unknown object in factory");
  63. }
  65. public SMIMECapabilities(
  66.         ASN1Sequence seq)
  67.     {
  68. capabilities = seq;
  69. }
  71.     /**
  72.      * returns a vector with 0 or more objects of all the capabilities
  73.      * matching the passed in capability OID. If the OID passed is null the
  74.      * entire set is returned.
  75.      */
  76.     public Vector getCapabilities(
  77.         DERObjectIdentifier capability)
  78.     {
  79.         Enumeration e = capabilities.getObjects();
  80.         Vector      list = new Vector();
  82.         if (capability == null)
  83.         {
  84.             while (e.hasMoreElements())
  85.             {
  86.                 SMIMECapability  cap = SMIMECapability.getInstance(e.nextElement());
  88.                 list.addElement(cap);
  89.             }
  90.         }
  91.         else
  92.         {
  93.             while (e.hasMoreElements())
  94.             {
  95.                 SMIMECapability  cap = SMIMECapability.getInstance(e.nextElement());
  97.                 if (capability.equals(cap.getCapabilityID()))
  98.                 {
  99.                     list.addElement(cap);
  100.                 }
  101.             }
  102.         }
  104.         return list;
  105. }
  107.     /** 
  108.      * <pre>
  109.      * SMIMECapabilities ::= SEQUENCE OF SMIMECapability
  110.      * </pre>
  111.      */
  112. public DERObject getDERObject()
  113.     {
  114. return capabilities;
  115. }
  116. }