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SignedData.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：5k
源码类别：

CA认证

开发平台：

Java

SignedData.java：源码内容
  1. package org.bouncycastle.asn1.cms;
  3. import java.util.Enumeration;
  5. import org.bouncycastle.asn1.*;
  6. import org.bouncycastle.asn1.x509.*;
  8. /**
  9.  * a signed data object.
  10.  */
  11. public class SignedData
  12.     implements DEREncodable, CMSObjectIdentifiers
  13. {
  14.     private DERInteger  version;
  15.     private ASN1Set     digestAlgorithms;
  16.     private ContentInfo contentInfo;
  17.     private ASN1Set     certificates;
  18.     private ASN1Set     crls;
  19.     private ASN1Set     signerInfos;
  21.     public static SignedData getInstance(
  22.         Object  o)
  23.     {
  24.         if (o instanceof SignedData)
  25.         {
  26.             return (SignedData)o;
  27.         }
  28.         else if (o instanceof ASN1Sequence)
  29.         {
  30.             return new SignedData((ASN1Sequence)o);
  31.         }
  33.         throw new IllegalArgumentException("unknown object in factory");
  34.     }
  36. public SignedData(
  37. ASN1Set     digestAlgorithms,
  38. ContentInfo contentInfo,
  39. ASN1Set     certificates,
  40. ASN1Set     crls,
  41. ASN1Set     signerInfos)
  42. {
  43.         if (contentInfo.getContentType().equals(CMSObjectIdentifiers.data))
  44.         {
  45.             //
  46.             // we should also be looking for attribute certificates here,
  47.             // later.
  48.             //
  49.             Enumeration e = signerInfos.getObjects();
  50.             boolean     v3Found = false;
  52.             while (e.hasMoreElements())
  53.             {
  54.                 SignerInfo  s = SignerInfo.getInstance(e.nextElement());
  56.                 if (s.getVersion().getValue().intValue() == 3)
  57.                 {
  58.                     v3Found = true;
  59.                 }
  60.             }
  62.             if (v3Found)
  63.             {
  64.                 this.version = new DERInteger(3);
  65.             }
  66.             else
  67.             {
  68.                 this.version = new DERInteger(1);
  69.             }
  70.         }
  71.         else
  72.         {
  73.             this.version = new DERInteger(3);
  74.         }
  76. this.digestAlgorithms = digestAlgorithms;
  77. this.contentInfo = contentInfo;
  78. this.certificates = certificates;
  79. this.crls = crls;
  80. this.signerInfos = signerInfos;
  81. }
  83.     public SignedData(
  84.         ASN1Sequence seq)
  85.     {
  86.         Enumeration     e = seq.getObjects();
  88.         version = (DERInteger)e.nextElement();
  89.         digestAlgorithms = ((ASN1Set)e.nextElement());
  90.         contentInfo = ContentInfo.getInstance(e.nextElement());
  92.         while (e.hasMoreElements())
  93.         {
  94.             DERObject o = (DERObject)e.nextElement();
  96.             //
  97.             // an interesting feature of SignedData is that there appear
  98.             // to be varying implementations...
  99.             // for the moment we ignore anything which doesn't fit.
  100.             //
  101.             if (o instanceof DERTaggedObject)
  102.             {
  103.                 DERTaggedObject tagged = (DERTaggedObject)o;
  105.                 switch (tagged.getTagNo())
  106.                 {
  107.                 case 0:
  108.                     certificates = ASN1Set.getInstance(tagged, false);
  109.                     break;
  110.                 case 1:
  111.                     crls = ASN1Set.getInstance(tagged, false);
  112.                     break;
  113.                 default:
  114.                     throw new IllegalArgumentException("unknown tag value " + tagged.getTagNo());
  115.                 }
  116.             }
  117.             else
  118.             {
  119.                 signerInfos = (ASN1Set)o;
  120.             }
  121.         }
  122.     }
  124.     public DERInteger getVersion()
  125.     {
  126.         return version;
  127.     }
  129.     public ASN1Set getDigestAlgorithms()
  130.     {
  131.         return digestAlgorithms;
  132.     }
  134.     public ContentInfo getEncapContentInfo()
  135.     {
  136.         return contentInfo;
  137.     }
  139.     public ASN1Set getCertificates()
  140.     {
  141.         return certificates;
  142.     }
  144.     public ASN1Set getCRLs()
  145.     {
  146.         return crls;
  147.     }
  149.     public ASN1Set getSignerInfos()
  150.     {
  151.         return signerInfos;
  152.     }
  154.     /**
  155.      * <pre>
  156.      * SignedData ::= SEQUENCE {
  157.      *     version CMSVersion,
  158.      *     digestAlgorithms DigestAlgorithmIdentifiers,
  159.      *     encapContentInfo EncapsulatedContentInfo,
  160.      *     certificates [0] IMPLICIT CertificateSet OPTIONAL,
  161.      *     crls [1] IMPLICIT CertificateRevocationLists OPTIONAL,
  162.      *     signerInfos SignerInfos
  163.      *   }
  164.      * </pre>
  165.      */
  166.     public DERObject getDERObject()
  167.     {
  168.         ASN1EncodableVector  v = new ASN1EncodableVector();
  170.         v.add(version);
  171.         v.add(digestAlgorithms);
  172.         v.add(contentInfo);
  174.         if (certificates != null)
  175.         {
  176.             v.add(new DERTaggedObject(false, 0, certificates));
  177.         }
  179.         if (crls != null)
  180.         {
  181.             v.add(new DERTaggedObject(false, 1, crls));
  182.         }
  184.         v.add(signerInfos);
  186.         return new BERSequence(v);
  187.     }
  188. }