| 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.DERInteger; |
| import org.bouncycastle.asn1.DERObject; |
| import org.bouncycastle.asn1.DERSequence; |
| import org.bouncycastle.asn1.x509.AlgorithmIdentifier; |
| |
| public class KEKRecipientInfo |
| extends ASN1Encodable |
| { |
| private DERInteger version; |
| private KEKIdentifier kekid; |
| private AlgorithmIdentifier keyEncryptionAlgorithm; |
| private ASN1OctetString encryptedKey; |
| |
| public KEKRecipientInfo( |
| KEKIdentifier kekid, |
| AlgorithmIdentifier keyEncryptionAlgorithm, |
| ASN1OctetString encryptedKey) |
| { |
| this.version = new DERInteger(4); |
| this.kekid = kekid; |
| this.keyEncryptionAlgorithm = keyEncryptionAlgorithm; |
| this.encryptedKey = encryptedKey; |
| } |
| |
| public KEKRecipientInfo( |
| ASN1Sequence seq) |
| { |
| version = (DERInteger)seq.getObjectAt(0); |
| kekid = KEKIdentifier.getInstance(seq.getObjectAt(1)); |
| keyEncryptionAlgorithm = AlgorithmIdentifier.getInstance(seq.getObjectAt(2)); |
| encryptedKey = (ASN1OctetString)seq.getObjectAt(3); |
| } |
| |
| /** |
| * return a KEKRecipientInfo object from a tagged object. |
| * |
| * @param obj the tagged object holding the object we want. |
| * @param explicit true if the object is meant to be explicitly |
| * tagged false otherwise. |
| * @exception IllegalArgumentException if the object held by the |
| * tagged object cannot be converted. |
| */ |
| public static KEKRecipientInfo getInstance( |
| ASN1TaggedObject obj, |
| boolean explicit) |
| { |
| return getInstance(ASN1Sequence.getInstance(obj, explicit)); |
| } |
| |
| /** |
| * return a KEKRecipientInfo object from the given object. |
| * |
| * @param obj the object we want converted. |
| * @exception IllegalArgumentException if the object cannot be converted. |
| */ |
| public static KEKRecipientInfo getInstance( |
| Object obj) |
| { |
| if (obj == null || obj instanceof KEKRecipientInfo) |
| { |
| return (KEKRecipientInfo)obj; |
| } |
| |
| if(obj instanceof ASN1Sequence) |
| { |
| return new KEKRecipientInfo((ASN1Sequence)obj); |
| } |
| |
| throw new IllegalArgumentException("Invalid KEKRecipientInfo: " + obj.getClass().getName()); |
| } |
| |
| public DERInteger getVersion() |
| { |
| return version; |
| } |
| |
| public KEKIdentifier getKekid() |
| { |
| return kekid; |
| } |
| |
| public AlgorithmIdentifier getKeyEncryptionAlgorithm() |
| { |
| return keyEncryptionAlgorithm; |
| } |
| |
| public ASN1OctetString getEncryptedKey() |
| { |
| return encryptedKey; |
| } |
| |
| /** |
| * Produce an object suitable for an ASN1OutputStream. |
| * <pre> |
| * KEKRecipientInfo ::= SEQUENCE { |
| * version CMSVersion, -- always set to 4 |
| * kekid KEKIdentifier, |
| * keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier, |
| * encryptedKey EncryptedKey |
| * } |
| * </pre> |
| */ |
| public DERObject toASN1Object() |
| { |
| ASN1EncodableVector v = new ASN1EncodableVector(); |
| |
| v.add(version); |
| v.add(kekid); |
| v.add(keyEncryptionAlgorithm); |
| v.add(encryptedKey); |
| |
| return new DERSequence(v); |
| } |
| } |