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using System;
namespace Org.BouncyCastle.Asn1.Cms
{
public class MetaData
: Asn1Encodable
{
public static MetaData GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is MetaData metaData)
return metaData;
return new MetaData(Asn1Sequence.GetInstance(obj));
}
public static MetaData GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
return new MetaData(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
}
public static MetaData GetOptional(Asn1Encodable element)
{
if (element == null)
throw new ArgumentNullException(nameof(element));
if (element is MetaData metaData)
return metaData;
Asn1Sequence asn1Sequence = Asn1Sequence.GetOptional(element);
if (asn1Sequence != null)
return new MetaData(asn1Sequence);
return null;
}
private readonly DerBoolean m_hashProtected;
private readonly DerUtf8String m_fileName;
private readonly DerIA5String m_mediaType;
private readonly Attributes m_otherMetaData;
public MetaData(DerBoolean hashProtected, DerUtf8String fileName, DerIA5String mediaType,
Attributes otherMetaData)
{
m_hashProtected = hashProtected ?? throw new ArgumentNullException(nameof(hashProtected));
m_fileName = fileName;
m_mediaType = mediaType;
m_otherMetaData = otherMetaData;
}
private MetaData(Asn1Sequence seq)
{
int count = seq.Count, pos = 0;
if (count < 1 || count > 4)
throw new ArgumentException("Bad sequence size: " + count, nameof(seq));
m_hashProtected = DerBoolean.GetInstance(seq[pos++]);
m_fileName = Asn1Utilities.ReadOptional(seq, ref pos, DerUtf8String.GetOptional);
m_mediaType = Asn1Utilities.ReadOptional(seq, ref pos, DerIA5String.GetOptional);
m_otherMetaData = Asn1Utilities.ReadOptional(seq, ref pos, Attributes.GetOptional);
if (pos != count)
throw new ArgumentException("Unexpected elements in sequence", nameof(seq));
}
public virtual bool IsHashProtected => m_hashProtected.IsTrue;
public virtual DerUtf8String FileName => m_fileName;
public virtual DerIA5String MediaType => m_mediaType;
public virtual Attributes OtherMetaData => m_otherMetaData;
/**
* <pre>
* MetaData ::= SEQUENCE {
* hashProtected BOOLEAN,
* fileName UTF8String OPTIONAL,
* mediaType IA5String OPTIONAL,
* otherMetaData Attributes OPTIONAL
* }
* </pre>
* @return
*/
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(4);
v.Add(m_hashProtected);
v.AddOptional(m_fileName, m_mediaType, m_otherMetaData);
return new DerSequence(v);
}
}
}
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