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SignerInfo.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

SignerInfo.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. public class SignerInfo
  9.     implements DEREncodable
  10. {
  11.     private DERInteger              version;
  12.     private SignerIdentifier        sid;
  13.     private AlgorithmIdentifier     digAlgorithm;
  14.     private ASN1Set                 authenticatedAttributes;
  15.     private AlgorithmIdentifier     digEncryptionAlgorithm;
  16.     private ASN1OctetString         encryptedDigest;
  17.     private ASN1Set                 unauthenticatedAttributes;
  19.     public static SignerInfo getInstance(
  20.         Object  o)
  21.     {
  22.         if (o == null || o instanceof SignerInfo)
  23.         {
  24.             return (SignerInfo)o;
  25.         }
  26.         else if (o instanceof ASN1Sequence)
  27.         {
  28.             return new SignerInfo((ASN1Sequence)o);
  29.         }
  31.         throw new IllegalArgumentException("unknown object in factory");
  32.     }
  34.     public SignerInfo(
  35.         SignerIdentifier        sid,
  36.         AlgorithmIdentifier     digAlgorithm,
  37.         ASN1Set                 authenticatedAttributes,
  38.         AlgorithmIdentifier     digEncryptionAlgorithm,
  39.         ASN1OctetString         encryptedDigest,
  40.         ASN1Set                 unauthenticatedAttributes)
  41.     {
  42.         if (sid.isTagged())
  43.         {
  44.             this.version = new DERInteger(3);
  45.         }
  46.         else
  47.         {
  48.             this.version = new DERInteger(1);
  49.         }
  51.         this.sid = sid;
  52.         this.digAlgorithm = digAlgorithm;
  53.         this.authenticatedAttributes = authenticatedAttributes;
  54.         this.digEncryptionAlgorithm = digEncryptionAlgorithm;
  55.         this.encryptedDigest = encryptedDigest;
  56.         this.unauthenticatedAttributes = unauthenticatedAttributes;
  57.     }
  59.     public SignerInfo(
  60.         ASN1Sequence seq)
  61.     {
  62.         Enumeration     e = seq.getObjects();
  64.         version = (DERInteger)e.nextElement();
  65.         sid = SignerIdentifier.getInstance(e.nextElement());
  66.         digAlgorithm = AlgorithmIdentifier.getInstance(e.nextElement());
  68.         Object obj = e.nextElement();
  70.         if (obj instanceof ASN1TaggedObject)
  71.         {
  72.             authenticatedAttributes = ASN1Set.getInstance((ASN1TaggedObject)obj, false);
  74.             digEncryptionAlgorithm = AlgorithmIdentifier.getInstance(e.nextElement());
  75.         }
  76.         else
  77.         {
  78.             authenticatedAttributes = null;
  79.             digEncryptionAlgorithm = AlgorithmIdentifier.getInstance(obj);
  80.         }
  82.         encryptedDigest = DEROctetString.getInstance(e.nextElement());
  84.         if (e.hasMoreElements())
  85.         {
  86.             unauthenticatedAttributes = ASN1Set.getInstance((ASN1TaggedObject)e.nextElement(), false);
  87.         }
  88.         else
  89.         {
  90.             unauthenticatedAttributes = null;
  91.         }
  92.     }
  94.     public DERInteger getVersion()
  95.     {
  96.         return version;
  97.     }
  99.     public SignerIdentifier getSID()
  100.     {
  101.         return sid;
  102.     }
  104.     public ASN1Set getAuthenticatedAttributes()
  105.     {
  106.         return authenticatedAttributes;
  107.     }
  109.     public AlgorithmIdentifier getDigestAlgorithm()
  110.     {
  111.         return digAlgorithm;
  112.     }
  114.     public ASN1OctetString getEncryptedDigest()
  115.     {
  116.         return encryptedDigest;
  117.     }
  119.     public AlgorithmIdentifier getDigestEncryptionAlgorithm()
  120.     {
  121.         return digEncryptionAlgorithm;
  122.     }
  124.     public ASN1Set getUnauthenticatedAttributes()
  125.     {
  126.         return unauthenticatedAttributes;
  127.     }
  129.     /**
  130.      * <pre>
  131.      *  SignerInfo ::= SEQUENCE {
  132.      *      version Version,
  133.      *      SignerIdentifier sid,
  134.      *      digestAlgorithm DigestAlgorithmIdentifier,
  135.      *      authenticatedAttributes [0] IMPLICIT Attributes OPTIONAL,
  136.      *      digestEncryptionAlgorithm DigestEncryptionAlgorithmIdentifier,
  137.      *      encryptedDigest EncryptedDigest,
  138.      *      unauthenticatedAttributes [1] IMPLICIT Attributes OPTIONAL
  139.      *  }
  140.      *
  141.      *  EncryptedDigest ::= OCTET STRING
  142.      *
  143.      *  DigestAlgorithmIdentifier ::= AlgorithmIdentifier
  144.      *
  145.      *  DigestEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
  146.      * </pre>
  147.      */
  148.     public DERObject getDERObject()
  149.     {
  150.         ASN1EncodableVector v = new ASN1EncodableVector();
  152.         v.add(version);
  153.         v.add(sid);
  154.         v.add(digAlgorithm);
  156.         if (authenticatedAttributes != null)
  157.         {
  158.             v.add(new DERTaggedObject(false, 0, authenticatedAttributes));
  159.         }
  161.         v.add(digEncryptionAlgorithm);
  162.         v.add(encryptedDigest);
  164.         if (unauthenticatedAttributes != null)
  165.         {
  166.             v.add(new DERTaggedObject(false, 1, unauthenticatedAttributes));
  167.         }
  169.         return new DERSequence(v);
  170.     }
  171. }