| package org.bouncycastle.asn1.cms; |
| |
| import org.bouncycastle.asn1.ASN1Encodable; |
| import org.bouncycastle.asn1.ASN1EncodableVector; |
| import org.bouncycastle.asn1.ASN1OctetString; |
| import org.bouncycastle.asn1.ASN1Sequence; |
| import org.bouncycastle.asn1.ASN1TaggedObject; |
| import org.bouncycastle.asn1.BERSequence; |
| import org.bouncycastle.asn1.BERTaggedObject; |
| import org.bouncycastle.asn1.DERObject; |
| import org.bouncycastle.asn1.DERObjectIdentifier; |
| import org.bouncycastle.asn1.x509.AlgorithmIdentifier; |
| |
| public class EncryptedContentInfo |
| extends ASN1Encodable |
| { |
| private DERObjectIdentifier contentType; |
| private AlgorithmIdentifier contentEncryptionAlgorithm; |
| private ASN1OctetString encryptedContent; |
| |
| public EncryptedContentInfo( |
| DERObjectIdentifier contentType, |
| AlgorithmIdentifier contentEncryptionAlgorithm, |
| ASN1OctetString encryptedContent) |
| { |
| this.contentType = contentType; |
| this.contentEncryptionAlgorithm = contentEncryptionAlgorithm; |
| this.encryptedContent = encryptedContent; |
| } |
| |
| public EncryptedContentInfo( |
| ASN1Sequence seq) |
| { |
| contentType = (DERObjectIdentifier)seq.getObjectAt(0); |
| contentEncryptionAlgorithm = AlgorithmIdentifier.getInstance( |
| seq.getObjectAt(1)); |
| if (seq.size() > 2) |
| { |
| encryptedContent = ASN1OctetString.getInstance( |
| (ASN1TaggedObject)seq.getObjectAt(2), false); |
| } |
| } |
| |
| /** |
| * return an EncryptedContentInfo object from the given object. |
| * |
| * @param obj the object we want converted. |
| * @exception IllegalArgumentException if the object cannot be converted. |
| */ |
| public static EncryptedContentInfo getInstance( |
| Object obj) |
| { |
| if (obj == null || obj instanceof EncryptedContentInfo) |
| { |
| return (EncryptedContentInfo)obj; |
| } |
| |
| if (obj instanceof ASN1Sequence) |
| { |
| return new EncryptedContentInfo((ASN1Sequence)obj); |
| } |
| |
| throw new IllegalArgumentException("Invalid EncryptedContentInfo: " |
| + obj.getClass().getName()); |
| } |
| |
| public DERObjectIdentifier getContentType() |
| { |
| return contentType; |
| } |
| |
| public AlgorithmIdentifier getContentEncryptionAlgorithm() |
| { |
| return contentEncryptionAlgorithm; |
| } |
| |
| public ASN1OctetString getEncryptedContent() |
| { |
| return encryptedContent; |
| } |
| |
| /** |
| * Produce an object suitable for an ASN1OutputStream. |
| * <pre> |
| * EncryptedContentInfo ::= SEQUENCE { |
| * contentType ContentType, |
| * contentEncryptionAlgorithm ContentEncryptionAlgorithmIdentifier, |
| * encryptedContent [0] IMPLICIT EncryptedContent OPTIONAL |
| * } |
| * </pre> |
| */ |
| public DERObject toASN1Object() |
| { |
| ASN1EncodableVector v = new ASN1EncodableVector(); |
| |
| v.add(contentType); |
| v.add(contentEncryptionAlgorithm); |
| |
| if (encryptedContent != null) |
| { |
| v.add(new BERTaggedObject(false, 0, encryptedContent)); |
| } |
| |
| return new BERSequence(v); |
| } |
| } |