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Pkcs9DocumentName.cs
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Pkcs9DocumentName.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using Internal.Cryptography;
namespace System.Security.Cryptography.Pkcs
{
public sealed class Pkcs9DocumentName : Pkcs9AttributeObject
{
//
// Constructors.
//
public Pkcs9DocumentName()
: base(Oids.DocumentNameOid.CopyOid())
{
}
public Pkcs9DocumentName(string documentName)
: base(Oids.DocumentNameOid.CopyOid(), Encode(documentName))
{
_lazyDocumentName = documentName;
}
public Pkcs9DocumentName(byte[] encodedDocumentName)
: base(Oids.DocumentNameOid.CopyOid(), encodedDocumentName)
{
}
internal Pkcs9DocumentName(ReadOnlySpan<byte> encodedDocumentName)
: base(Oids.DocumentNameOid.CopyOid(), encodedDocumentName)
{
}
//
// Public methods.
//
public string DocumentName
{
get
{
return _lazyDocumentName ??= Decode(RawData);
}
}
public override void CopyFrom(AsnEncodedData asnEncodedData)
{
base.CopyFrom(asnEncodedData);
_lazyDocumentName = null;
}
//
// Private methods.
//
[return: NotNullIfNotNull(nameof(rawData))]
private static string? Decode(byte[]? rawData)
{
if (rawData == null)
return null;
byte[] octets = PkcsHelpers.DecodeOctetString(rawData);
return octets.OctetStringToUnicode();
}
private static byte[] Encode(string documentName)
{
if (documentName is null)
{
throw new ArgumentNullException(nameof(documentName));
}
byte[] octets = documentName.UnicodeToOctetString();
return PkcsHelpers.EncodeOctetString(octets);
}
private volatile string? _lazyDocumentName;
}
}