| package org.bouncycastle.asn1.pkcs; |
| |
| import org.bouncycastle.asn1.ASN1Encodable; |
| import org.bouncycastle.asn1.ASN1EncodableVector; |
| import org.bouncycastle.asn1.ASN1OctetString; |
| import org.bouncycastle.asn1.ASN1Sequence; |
| import org.bouncycastle.asn1.BERSequence; |
| import org.bouncycastle.asn1.BERTaggedObject; |
| import org.bouncycastle.asn1.DEREncodable; |
| import org.bouncycastle.asn1.DERInteger; |
| import org.bouncycastle.asn1.DERObject; |
| import org.bouncycastle.asn1.DERObjectIdentifier; |
| import org.bouncycastle.asn1.DERTaggedObject; |
| 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 |
| extends ASN1Encodable |
| { |
| 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: " + obj.getClass().getName()); |
| } |
| |
| 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, false); |
| } |
| |
| return null; |
| } |
| |
| public DERObject toASN1Object() |
| { |
| ASN1EncodableVector v = new ASN1EncodableVector(); |
| |
| v.add(new DERInteger(0)); |
| v.add(data); |
| |
| return new BERSequence(v); |
| } |
| } |