diff options
Diffstat (limited to 'core/src/main/java/org/spongycastle/asn1/cms/RecipientEncryptedKey.java')
-rw-r--r-- | core/src/main/java/org/spongycastle/asn1/cms/RecipientEncryptedKey.java | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/asn1/cms/RecipientEncryptedKey.java b/core/src/main/java/org/spongycastle/asn1/cms/RecipientEncryptedKey.java new file mode 100644 index 00000000..a51a13a5 --- /dev/null +++ b/core/src/main/java/org/spongycastle/asn1/cms/RecipientEncryptedKey.java @@ -0,0 +1,109 @@ +package org.spongycastle.asn1.cms; + +import org.spongycastle.asn1.ASN1EncodableVector; +import org.spongycastle.asn1.ASN1Object; +import org.spongycastle.asn1.ASN1OctetString; +import org.spongycastle.asn1.ASN1Primitive; +import org.spongycastle.asn1.ASN1Sequence; +import org.spongycastle.asn1.ASN1TaggedObject; +import org.spongycastle.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.spongycastle.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); + } +} |