diff options
Diffstat (limited to 'bcprov/src/main/java/org/bouncycastle/asn1/cms/KeyAgreeRecipientIdentifier.java')
-rw-r--r-- | bcprov/src/main/java/org/bouncycastle/asn1/cms/KeyAgreeRecipientIdentifier.java | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/bcprov/src/main/java/org/bouncycastle/asn1/cms/KeyAgreeRecipientIdentifier.java b/bcprov/src/main/java/org/bouncycastle/asn1/cms/KeyAgreeRecipientIdentifier.java new file mode 100644 index 0000000..6580cd4 --- /dev/null +++ b/bcprov/src/main/java/org/bouncycastle/asn1/cms/KeyAgreeRecipientIdentifier.java @@ -0,0 +1,116 @@ +package org.bouncycastle.asn1.cms; + +import org.bouncycastle.asn1.ASN1Choice; +import org.bouncycastle.asn1.ASN1Object; +import org.bouncycastle.asn1.ASN1Primitive; +import org.bouncycastle.asn1.ASN1Sequence; +import org.bouncycastle.asn1.ASN1TaggedObject; +import org.bouncycastle.asn1.DERTaggedObject; + +/** + * <a href="http://tools.ietf.org/html/rfc5652#section-6.2.2">RFC 5652</a>: + * Content encryption key delivery mechanisms. + * <p> + * <pre> + * KeyAgreeRecipientIdentifier ::= CHOICE { + * issuerAndSerialNumber IssuerAndSerialNumber, + * rKeyId [0] IMPLICIT RecipientKeyIdentifier } + * </pre> + */ +public class KeyAgreeRecipientIdentifier + extends ASN1Object + implements ASN1Choice +{ + private IssuerAndSerialNumber issuerSerial; + private RecipientKeyIdentifier rKeyID; + + /** + * Return an KeyAgreeRecipientIdentifier 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 KeyAgreeRecipientIdentifier getInstance( + ASN1TaggedObject obj, + boolean explicit) + { + return getInstance(ASN1Sequence.getInstance(obj, explicit)); + } + + /** + * Return an KeyAgreeRecipientIdentifier object from the given object. + * <p> + * Accepted inputs: + * <ul> + * <li> {@link KeyAgreeRecipientIdentifier} object + * <li> {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with IssuerAndSerialNumber structure inside + * <li> {@link org.bouncycastle.asn1.ASN1TaggedObject#getInstance(java.lang.Object) ASN1TaggedObject} with tag value 0: a KeyAgreeRecipientIdentifier data structure + * </ul> + * <p> + * Note: no byte[] input! + * + * @param obj the object we want converted. + * @exception IllegalArgumentException if the object cannot be converted. + */ + public static KeyAgreeRecipientIdentifier getInstance( + Object obj) + { + if (obj == null || obj instanceof KeyAgreeRecipientIdentifier) + { + return (KeyAgreeRecipientIdentifier)obj; + } + + if (obj instanceof ASN1Sequence) + { + return new KeyAgreeRecipientIdentifier(IssuerAndSerialNumber.getInstance(obj)); + } + + if (obj instanceof ASN1TaggedObject && ((ASN1TaggedObject)obj).getTagNo() == 0) + { + return new KeyAgreeRecipientIdentifier(RecipientKeyIdentifier.getInstance( + (ASN1TaggedObject)obj, false)); + } + + throw new IllegalArgumentException("Invalid KeyAgreeRecipientIdentifier: " + obj.getClass().getName()); + } + + public KeyAgreeRecipientIdentifier( + IssuerAndSerialNumber issuerSerial) + { + this.issuerSerial = issuerSerial; + this.rKeyID = null; + } + + public KeyAgreeRecipientIdentifier( + RecipientKeyIdentifier rKeyID) + { + this.issuerSerial = null; + this.rKeyID = rKeyID; + } + + public IssuerAndSerialNumber getIssuerAndSerialNumber() + { + return issuerSerial; + } + + public RecipientKeyIdentifier getRKeyID() + { + return rKeyID; + } + + /** + * Produce an object suitable for an ASN1OutputStream. + */ + public ASN1Primitive toASN1Primitive() + { + if (issuerSerial != null) + { + return issuerSerial.toASN1Primitive(); + } + + return new DERTaggedObject(false, 0, rKeyID); + } +} |