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using System;
using Org.BouncyCastle.Asn1.X509;
namespace Org.BouncyCastle.Asn1.Pkcs
{
/**
* The EncryptedData object.
* <pre>
* EncryptedData ::= Sequence {
* version Version,
* encryptedContentInfo EncryptedContentInfo
* }
*
*
* EncryptedContentInfo ::= Sequence {
* contentType ContentType,
* contentEncryptionAlgorithm ContentEncryptionAlgorithmIdentifier,
* encryptedContent [0] IMPLICIT EncryptedContent OPTIONAL
* }
*
* EncryptedContent ::= OCTET STRING
* </pre>
*/
public class EncryptedData
: Asn1Encodable
{
private readonly Asn1Sequence m_data;
// private readonly DerObjectIdentifier bagId;
// private readonly Asn1Object bagValue;
public static EncryptedData GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is EncryptedData encryptedData)
return encryptedData;
return new EncryptedData(Asn1Sequence.GetInstance(obj));
}
public static EncryptedData GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
return new EncryptedData(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
}
private EncryptedData(Asn1Sequence seq)
{
int count = seq.Count;
if (count != 2)
throw new ArgumentException("Bad sequence size: " + count, nameof(seq));
DerInteger version = DerInteger.GetInstance(seq[0]);
if (!version.HasValue(0))
throw new ArgumentException("sequence not version 0");
m_data = Asn1Sequence.GetInstance(seq[1]);
}
public EncryptedData(DerObjectIdentifier contentType, AlgorithmIdentifier encryptionAlgorithm,
Asn1Encodable content)
{
m_data = new BerSequence(contentType, encryptionAlgorithm, new BerTaggedObject(false, 0, content));
}
public DerObjectIdentifier ContentType => DerObjectIdentifier.GetInstance(m_data[0]);
public AlgorithmIdentifier EncryptionAlgorithm => AlgorithmIdentifier.GetInstance(m_data[1]);
public Asn1OctetString Content
{
get
{
if (m_data.Count != 3)
return null;
Asn1TaggedObject tagged = Asn1TaggedObject.GetInstance(m_data[2], Asn1Tags.ContextSpecific, 0);
return Asn1OctetString.GetInstance(tagged, declaredExplicit: false);
}
}
public override Asn1Object ToAsn1Object() => new BerSequence(DerInteger.Zero, m_data);
}
}
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