package org.bouncycastle.asn1.pkcs; import org.bouncycastle.asn1.*; import org.bouncycastle.asn1.x509.AlgorithmIdentifier; /** * The EncryptedData object. * <pre> * EncryptedData ::= SEQUENCE { * version Version, * encryptedContentInfo EncryptedContentInfo * } * * * EncryptedContentInfo ::= SEQUENCE { * contentType ContentType, * contentEncryptionAlgorithm ContentEncryptionAlgorithmIdentifier, * encryptedContent [0] IMPLICIT EncryptedContent OPTIONAL * } * * EncryptedContent ::= OCTET STRING * </pre> */ public class EncryptedData implements DEREncodable { ASN1Sequence data; DERObjectIdentifier bagId; DERObject bagValue; public static EncryptedData getInstance( Object obj) { if (obj instanceof EncryptedData) { return (EncryptedData)obj; } else if (obj instanceof ASN1Sequence) { return new EncryptedData((ASN1Sequence)obj); } throw new IllegalArgumentException("unknown object in factory"); } public EncryptedData( ASN1Sequence seq) { int version = ((DERInteger)seq.getObjectAt(0)).getValue().intValue(); if (version != 0) { throw new IllegalArgumentException("sequence not version 0"); } this.data = (ASN1Sequence)seq.getObjectAt(1); } public EncryptedData( DERObjectIdentifier contentType, AlgorithmIdentifier encryptionAlgorithm, DEREncodable content) { ASN1EncodableVector v = new ASN1EncodableVector(); v.add(contentType); v.add(encryptionAlgorithm.getDERObject()); v.add(new BERTaggedObject(false, 0, content)); data = new BERSequence(v); } public DERObjectIdentifier getContentType() { return (DERObjectIdentifier)data.getObjectAt(0); } public AlgorithmIdentifier getEncryptionAlgorithm() { return AlgorithmIdentifier.getInstance(data.getObjectAt(1)); } public ASN1OctetString getContent() { if (data.size() == 3) { DERTaggedObject o = (DERTaggedObject)data.getObjectAt(2); return ASN1OctetString.getInstance(o.getObject()); } return null; } public DERObject getDERObject() { ASN1EncodableVector v = new ASN1EncodableVector(); v.add(new DERInteger(0)); v.add(data); return new BERSequence(v); } }