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EncryptedContentInfo.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

EncryptedContentInfo.java：源码内容
  1. package org.bouncycastle.asn1.cms;
  3. import org.bouncycastle.asn1.ASN1OctetString;
  4. import org.bouncycastle.asn1.ASN1Sequence;
  5. import org.bouncycastle.asn1.ASN1TaggedObject;
  6. import org.bouncycastle.asn1.BERSequence;
  7. import org.bouncycastle.asn1.BERTaggedObject;
  8. import org.bouncycastle.asn1.DERObject;
  9. import org.bouncycastle.asn1.DERObjectIdentifier;
  10. import org.bouncycastle.asn1.DEREncodable;
  11. import org.bouncycastle.asn1.ASN1EncodableVector;
  12. import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
  14. public class EncryptedContentInfo
  15.     implements DEREncodable
  16. {
  17. private DERObjectIdentifier contentType;
  18. private AlgorithmIdentifier contentEncryptionAlgorithm;
  19. private ASN1OctetString     encryptedContent;
  21. public EncryptedContentInfo(
  22.         DERObjectIdentifier contentType, 
  23.         AlgorithmIdentifier contentEncryptionAlgorithm,
  24.         ASN1OctetString     encryptedContent)
  25.     {
  26. this.contentType = contentType;
  27. this.contentEncryptionAlgorithm = contentEncryptionAlgorithm;
  28. this.encryptedContent = encryptedContent;
  29. }
  31. public EncryptedContentInfo(
  32.         ASN1Sequence seq)
  33.     {
  34. contentType = (DERObjectIdentifier)seq.getObjectAt(0);
  35. contentEncryptionAlgorithm = AlgorithmIdentifier.getInstance(
  36.                                                         seq.getObjectAt(1));
  37. if (seq.size() > 2)
  38.         {
  39. encryptedContent = ASN1OctetString.getInstance(
  40.                                 (ASN1TaggedObject)seq.getObjectAt(2), false);
  41. }
  42. }
  44.     /**
  45.      * return an EncryptedContentInfo object from the given object.
  46.      *
  47.      * @param obj the object we want converted.
  48.      * @exception IllegalArgumentException if the object cannot be converted.
  49.      */
  50. public static EncryptedContentInfo getInstance(
  51.         Object obj)
  52.     {
  53. if (obj == null || obj instanceof EncryptedContentInfo)
  54.         {
  55. return (EncryptedContentInfo)obj;
  56. }
  58. if (obj instanceof ASN1Sequence)
  59.         {
  60. return new EncryptedContentInfo((ASN1Sequence)obj);
  61. }
  63. throw new IllegalArgumentException("Invalid EncryptedContentInfo: "
  64.                                                 + obj.getClass().getName());
  65. }
  67. public DERObjectIdentifier getContentType()
  68.     {
  69. return contentType;
  70. }
  72. public AlgorithmIdentifier getContentEncryptionAlgorithm()
  73.     {
  74. return contentEncryptionAlgorithm;
  75. }
  77. public ASN1OctetString getEncryptedContent()
  78.     {
  79. return encryptedContent;
  80. }
  82.     /** 
  83.      * <pre>
  84.      * EncryptedContentInfo ::= SEQUENCE {
  85.      *  contentType ContentType,
  86.      *  contentEncryptionAlgorithm ContentEncryptionAlgorithmIdentifier,
  87.      *  encryptedContent [0] IMPLICIT EncryptedContent OPTIONAL 
  88.      * }
  89.      * </pre>
  90.      */
  91. public DERObject getDERObject()
  92.     {
  93.         ASN1EncodableVector  v = new ASN1EncodableVector();
  95. v.add(contentType);
  96. v.add(contentEncryptionAlgorithm);
  98. if (encryptedContent != null)
  99.         {
  100. v.add(new BERTaggedObject(false, 0, encryptedContent));
  101. }
  103. return new BERSequence(v);
  104. }
  105. }