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KEKRecipientInfo.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

KEKRecipientInfo.java：源码内容
  1. package org.bouncycastle.asn1.cms;
  3. import org.bouncycastle.asn1.ASN1Sequence;
  4. import org.bouncycastle.asn1.ASN1TaggedObject;
  5. import org.bouncycastle.asn1.ASN1OctetString;
  7. import org.bouncycastle.asn1.DERObject;
  8. import org.bouncycastle.asn1.DERInteger;
  9. import org.bouncycastle.asn1.DERSequence;
  10. import org.bouncycastle.asn1.DEREncodable;
  11. import org.bouncycastle.asn1.ASN1EncodableVector;
  13. import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
  15. public class KEKRecipientInfo
  16.     implements DEREncodable
  17. {
  18. private DERInteger          version;
  19. private KEKIdentifier       kekid;
  20. private AlgorithmIdentifier keyEncryptionAlgorithm;
  21. private ASN1OctetString     encryptedKey;
  23. public KEKRecipientInfo(
  24.         KEKIdentifier       kekid,
  25.         AlgorithmIdentifier keyEncryptionAlgorithm,
  26.         ASN1OctetString     encryptedKey)
  27.     {
  28.         this.version = new DERInteger(4);
  29.         this.kekid = kekid;
  30.         this.keyEncryptionAlgorithm = keyEncryptionAlgorithm;
  31.         this.encryptedKey = encryptedKey;
  32. }
  34. public KEKRecipientInfo(
  35.         ASN1Sequence seq)
  36.     {
  37. version = (DERInteger)seq.getObjectAt(0);
  38. kekid = KEKIdentifier.getInstance(seq.getObjectAt(1));
  39. keyEncryptionAlgorithm = AlgorithmIdentifier.getInstance(seq.getObjectAt(2));
  40. encryptedKey = (ASN1OctetString)seq.getObjectAt(3);
  41. }
  43.     /**
  44.      * return a KEKRecipientInfo object from a tagged object.
  45.      *
  46.      * @param obj the tagged object holding the object we want.
  47.      * @param explicit true if the object is meant to be explicitly
  48.      *              tagged false otherwise.
  49.      * @exception IllegalArgumentException if the object held by the
  50.      *          tagged object cannot be converted.
  51.      */
  52. public static KEKRecipientInfo getInstance(
  53.         ASN1TaggedObject    obj,
  54.         boolean             explicit)
  55.     {
  56. return getInstance(ASN1Sequence.getInstance(obj, explicit));
  57. }
  59.     /**
  60.      * return a KEKRecipientInfo object from the given object.
  61.      *
  62.      * @param obj the object we want converted.
  63.      * @exception IllegalArgumentException if the object cannot be converted.
  64.      */
  65. public static KEKRecipientInfo getInstance(
  66.         Object obj)
  67.     {
  68. if (obj == null || obj instanceof KEKRecipientInfo)
  69.         {
  70. return (KEKRecipientInfo)obj;
  71. }
  73. if(obj instanceof ASN1Sequence)
  74.         {
  75. return new KEKRecipientInfo((ASN1Sequence)obj);
  76. }
  78. throw new IllegalArgumentException("Invalid KEKRecipientInfo: " + obj.getClass().getName());
  79. }
  81. public DERInteger getVersion()
  82.     {
  83. return version;
  84. }
  86. public KEKIdentifier getKekid()
  87.     {
  88. return kekid;
  89. }
  91. public AlgorithmIdentifier getKeyEncryptionAlgorithm()
  92.     {
  93. return keyEncryptionAlgorithm;
  94. }
  96. public ASN1OctetString getEncryptedKey()
  97.     {
  98. return encryptedKey;
  99. }
  101.     /** 
  102.      * <pre>
  103.      * KEKRecipientInfo ::= SEQUENCE {
  104.      *  version CMSVersion,  -- always set to 4
  105.      *  kekid KEKIdentifier,
  106.      *  keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier,
  107.      *  encryptedKey EncryptedKey 
  108.      * }
  109.      * </pre>
  110.      */
  111. public DERObject getDERObject()
  112.     {
  113. ASN1EncodableVector  v = new ASN1EncodableVector();
  115. v.add(version);
  116. v.add(kekid);
  117. v.add(keyEncryptionAlgorithm);
  118. v.add(encryptedKey);
  120. return new DERSequence(v);
  121. }
  122. }