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using System;
using Org.BouncyCastle.Asn1.X509;
namespace Org.BouncyCastle.Asn1.Cms
{
public class EncryptedContentInfo
: Asn1Encodable
{
public static EncryptedContentInfo GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is EncryptedContentInfo encryptedContentInfo)
return encryptedContentInfo;
#pragma warning disable CS0618 // Type or member is obsolete
return new EncryptedContentInfo(Asn1Sequence.GetInstance(obj));
#pragma warning restore CS0618 // Type or member is obsolete
}
public static EncryptedContentInfo GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
#pragma warning disable CS0618 // Type or member is obsolete
return new EncryptedContentInfo(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
#pragma warning restore CS0618 // Type or member is obsolete
}
private DerObjectIdentifier m_contentType;
private AlgorithmIdentifier m_contentEncryptionAlgorithm;
private Asn1OctetString m_encryptedContent;
public EncryptedContentInfo(DerObjectIdentifier contentType, AlgorithmIdentifier contentEncryptionAlgorithm,
Asn1OctetString encryptedContent)
{
m_contentType = contentType ?? throw new ArgumentNullException(nameof(contentType));
m_contentEncryptionAlgorithm = contentEncryptionAlgorithm ?? throw new ArgumentNullException(nameof(contentEncryptionAlgorithm));
m_encryptedContent = encryptedContent;
}
[Obsolete("Use 'GetInstance' instead")]
public EncryptedContentInfo(Asn1Sequence seq)
{
int count = seq.Count, pos = 0;
if (count < 2 || count > 3)
throw new ArgumentException("Bad sequence size: " + count, nameof(seq));
m_contentType = DerObjectIdentifier.GetInstance(seq[pos++]);
m_contentEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(seq[pos++]);
m_encryptedContent = Asn1Utilities.ReadOptionalContextTagged(seq, ref pos, 0, false, Asn1OctetString.GetTagged);
if (pos != count)
throw new ArgumentException("Unexpected elements in sequence", nameof(seq));
}
public DerObjectIdentifier ContentType => m_contentType;
public AlgorithmIdentifier ContentEncryptionAlgorithm => m_contentEncryptionAlgorithm;
public Asn1OctetString EncryptedContent => m_encryptedContent;
/**
* Produce an object suitable for an Asn1OutputStream.
* <pre>
* EncryptedContentInfo ::= Sequence {
* contentType ContentType,
* contentEncryptionAlgorithm ContentEncryptionAlgorithmIdentifier,
* encryptedContent [0] IMPLICIT EncryptedContent OPTIONAL
* }
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(3);
v.Add(m_contentType, m_contentEncryptionAlgorithm);
if (m_encryptedContent != null)
{
v.Add(new BerTaggedObject(false, 0, m_encryptedContent));
}
return new BerSequence(v);
}
}
}
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