package org.bouncycastle.asn1.cms; import org.bouncycastle.asn1.ASN1EncodableVector; import org.bouncycastle.asn1.ASN1Integer; import org.bouncycastle.asn1.ASN1Object; import org.bouncycastle.asn1.ASN1OctetString; import org.bouncycastle.asn1.ASN1Primitive; import org.bouncycastle.asn1.ASN1Sequence; import org.bouncycastle.asn1.ASN1TaggedObject; import org.bouncycastle.asn1.DERSequence; import org.bouncycastle.asn1.DERTaggedObject; import org.bouncycastle.asn1.x509.AlgorithmIdentifier; /** * RFC 5652: * Content encryption key delivery mechanisms. *
*
* KeyAgreeRecipientInfo ::= SEQUENCE { * version CMSVersion, -- always set to 3 * originator [0] EXPLICIT OriginatorIdentifierOrKey, * ukm [1] EXPLICIT UserKeyingMaterial OPTIONAL, * keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier, * recipientEncryptedKeys RecipientEncryptedKeys * } * * UserKeyingMaterial ::= OCTET STRING **/ public class KeyAgreeRecipientInfo extends ASN1Object { private ASN1Integer version; private OriginatorIdentifierOrKey originator; private ASN1OctetString ukm; private AlgorithmIdentifier keyEncryptionAlgorithm; private ASN1Sequence recipientEncryptedKeys; public KeyAgreeRecipientInfo( OriginatorIdentifierOrKey originator, ASN1OctetString ukm, AlgorithmIdentifier keyEncryptionAlgorithm, ASN1Sequence recipientEncryptedKeys) { this.version = new ASN1Integer(3); this.originator = originator; this.ukm = ukm; this.keyEncryptionAlgorithm = keyEncryptionAlgorithm; this.recipientEncryptedKeys = recipientEncryptedKeys; } /** * @deprecated use getInstance() */ public KeyAgreeRecipientInfo( ASN1Sequence seq) { int index = 0; version = (ASN1Integer)seq.getObjectAt(index++); originator = OriginatorIdentifierOrKey.getInstance( (ASN1TaggedObject)seq.getObjectAt(index++), true); if (seq.getObjectAt(index) instanceof ASN1TaggedObject) { ukm = ASN1OctetString.getInstance( (ASN1TaggedObject)seq.getObjectAt(index++), true); } keyEncryptionAlgorithm = AlgorithmIdentifier.getInstance( seq.getObjectAt(index++)); recipientEncryptedKeys = (ASN1Sequence)seq.getObjectAt(index++); } /** * Return a KeyAgreeRecipientInfo 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 KeyAgreeRecipientInfo getInstance( ASN1TaggedObject obj, boolean explicit) { return getInstance(ASN1Sequence.getInstance(obj, explicit)); } /** * Return a KeyAgreeRecipientInfo object from the given object. *
* Accepted inputs: *