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KeyTransRecipientInfo.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

KeyTransRecipientInfo.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;
  6. import org.bouncycastle.asn1.DERSequence;
  7. import org.bouncycastle.asn1.DEREncodable;
  8. import org.bouncycastle.asn1.DERInteger;
  9. import org.bouncycastle.asn1.DERObject;
  10. import org.bouncycastle.asn1.ASN1EncodableVector;
  12. import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
  14. public class KeyTransRecipientInfo
  15.     implements DEREncodable
  16. {
  17. private DERInteger          version;
  18. private RecipientIdentifier rid;
  19. private AlgorithmIdentifier keyEncryptionAlgorithm;
  20. private ASN1OctetString     encryptedKey;
  22. public KeyTransRecipientInfo(
  23.         RecipientIdentifier rid,
  24.         AlgorithmIdentifier keyEncryptionAlgorithm,
  25.         ASN1OctetString     encryptedKey)
  26.     {
  27. if (rid.getDERObject() instanceof ASN1TaggedObject)
  28.         {
  29.             this.version = new DERInteger(2);
  30. }
  31. else
  32.         {
  33.             this.version = new DERInteger(0);
  34. }
  36.         this.rid = rid;
  37.         this.keyEncryptionAlgorithm = keyEncryptionAlgorithm;
  38.         this.encryptedKey = encryptedKey;
  39. }
  41. public KeyTransRecipientInfo(
  42.         ASN1Sequence seq)
  43.     {
  44. this.version = (DERInteger)seq.getObjectAt(0);
  45. this.rid = RecipientIdentifier.getInstance(seq.getObjectAt(1));
  46. this.keyEncryptionAlgorithm = AlgorithmIdentifier.getInstance(seq.getObjectAt(2));
  47. this.encryptedKey = (ASN1OctetString)seq.getObjectAt(3);
  48. }
  50.     /**
  51.      * return a KeyTransRecipientInfo object from the given object.
  52.      *
  53.      * @param obj the object we want converted.
  54.      * @exception IllegalArgumentException if the object cannot be converted.
  55.      */
  56. public static KeyTransRecipientInfo getInstance(
  57.         Object obj)
  58.     {
  59. if (obj == null || obj instanceof KeyTransRecipientInfo)
  60.         {
  61. return (KeyTransRecipientInfo)obj;
  62. }
  64. if(obj instanceof ASN1Sequence)
  65.         {
  66. return new KeyTransRecipientInfo((ASN1Sequence)obj);
  67. }
  69. throw new IllegalArgumentException(
  70.         "Illegal object in KeyTransRecipientInfo: " + obj.getClass().getName());
  71. } 
  73. public DERInteger getVersion()
  74.     {
  75. return version;
  76. }
  78. public RecipientIdentifier getRecipientIdentifier()
  79.     {
  80. return rid;
  81. }
  83. public AlgorithmIdentifier getKeyEncryptionAlgorithm()
  84.     {
  85. return keyEncryptionAlgorithm;
  86. }
  88. public ASN1OctetString getEncryptedKey()
  89.     {
  90. return encryptedKey;
  91. }
  93.     /** 
  94.      * <pre>
  95.      * KeyTransRecipientInfo ::= SEQUENCE {
  96.      *  version CMSVersion,  -- always set to 0 or 2
  97.      *  rid RecipientIdentifier,
  98.      *  keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier,
  99.      *  encryptedKey EncryptedKey 
  100.      * }
  101.      * </pre>
  102.      */
  103. public DERObject getDERObject()
  104.     {
  105.         ASN1EncodableVector  v = new ASN1EncodableVector();
  107. v.add(version);
  108. v.add(rid);
  109. v.add(keyEncryptionAlgorithm);
  110. v.add(encryptedKey);
  112. return new DERSequence(v);
  113. }
  114. }