| package org.bouncycastle.asn1.cms; |
| |
| import org.bouncycastle.asn1.ASN1EncodableVector; |
| 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; |
| |
| /** |
| * <a href="http://tools.ietf.org/html/rfc5652#section-6.2.2">RFC 5652</a>: |
| * Content encryption key delivery mechanisms. |
| * <pre> |
| * RecipientEncryptedKey ::= SEQUENCE { |
| * rid KeyAgreeRecipientIdentifier, |
| * encryptedKey EncryptedKey |
| * } |
| * </pre> |
| */ |
| public class RecipientEncryptedKey |
| extends ASN1Object |
| { |
| private KeyAgreeRecipientIdentifier identifier; |
| private ASN1OctetString encryptedKey; |
| |
| private RecipientEncryptedKey( |
| ASN1Sequence seq) |
| { |
| identifier = KeyAgreeRecipientIdentifier.getInstance(seq.getObjectAt(0)); |
| encryptedKey = (ASN1OctetString)seq.getObjectAt(1); |
| } |
| |
| /** |
| * Return an RecipientEncryptedKey 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 RecipientEncryptedKey getInstance( |
| ASN1TaggedObject obj, |
| boolean explicit) |
| { |
| return getInstance(ASN1Sequence.getInstance(obj, explicit)); |
| } |
| |
| /** |
| * Return a RecipientEncryptedKey object from the given object. |
| * <p> |
| * Accepted inputs: |
| * <ul> |
| * <li> null → null |
| * <li> {@link RecipientEncryptedKey} object |
| * <li> {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with RecipientEncryptedKey structure inside |
| * </ul> |
| * |
| * @param obj the object we want converted. |
| * @exception IllegalArgumentException if the object cannot be converted. |
| */ |
| public static RecipientEncryptedKey getInstance( |
| Object obj) |
| { |
| if (obj instanceof RecipientEncryptedKey) |
| { |
| return (RecipientEncryptedKey)obj; |
| } |
| |
| if (obj != null) |
| { |
| return new RecipientEncryptedKey(ASN1Sequence.getInstance(obj)); |
| } |
| |
| return null; |
| } |
| |
| public RecipientEncryptedKey( |
| KeyAgreeRecipientIdentifier id, |
| ASN1OctetString encryptedKey) |
| { |
| this.identifier = id; |
| this.encryptedKey = encryptedKey; |
| } |
| |
| public KeyAgreeRecipientIdentifier getIdentifier() |
| { |
| return identifier; |
| } |
| |
| public ASN1OctetString getEncryptedKey() |
| { |
| return encryptedKey; |
| } |
| |
| /** |
| * Produce an object suitable for an ASN1OutputStream. |
| */ |
| public ASN1Primitive toASN1Primitive() |
| { |
| ASN1EncodableVector v = new ASN1EncodableVector(); |
| |
| v.add(identifier); |
| v.add(encryptedKey); |
| |
| return new DERSequence(v); |
| } |
| } |