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using System;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.Cms
{
public class RecipientEncryptedKey
: Asn1Encodable
{
private readonly KeyAgreeRecipientIdentifier identifier;
private readonly Asn1OctetString encryptedKey;
private RecipientEncryptedKey(
Asn1Sequence seq)
{
identifier = KeyAgreeRecipientIdentifier.GetInstance(seq[0]);
encryptedKey = (Asn1OctetString) seq[1];
}
/**
* return an RecipientEncryptedKey object from a tagged object.
*
* @param obj the tagged object holding the object we want.
* @param isExplicit true if the object is meant to be explicitly
* tagged false otherwise.
* @exception ArgumentException if the object held by the
* tagged object cannot be converted.
*/
public static RecipientEncryptedKey GetInstance(
Asn1TaggedObject obj,
bool isExplicit)
{
return GetInstance(Asn1Sequence.GetInstance(obj, isExplicit));
}
/**
* return a RecipientEncryptedKey object from the given object.
*
* @param obj the object we want converted.
* @exception ArgumentException if the object cannot be converted.
*/
public static RecipientEncryptedKey GetInstance(
object obj)
{
if (obj == null || obj is RecipientEncryptedKey)
{
return (RecipientEncryptedKey) obj;
}
if (obj is Asn1Sequence)
{
return new RecipientEncryptedKey((Asn1Sequence) obj);
}
throw new ArgumentException("Invalid RecipientEncryptedKey: " + Platform.GetTypeName(obj), "obj");
}
public RecipientEncryptedKey(
KeyAgreeRecipientIdentifier id,
Asn1OctetString encryptedKey)
{
this.identifier = id;
this.encryptedKey = encryptedKey;
}
public KeyAgreeRecipientIdentifier Identifier
{
get { return identifier; }
}
public Asn1OctetString EncryptedKey
{
get { return encryptedKey; }
}
/**
* Produce an object suitable for an Asn1OutputStream.
* <pre>
* RecipientEncryptedKey ::= SEQUENCE {
* rid KeyAgreeRecipientIdentifier,
* encryptedKey EncryptedKey
* }
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
return new DerSequence(identifier, encryptedKey);
}
}
}
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