|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
#pragma warning disable SA1028 // ignore whitespace warnings for generated code
using System;
using System.Formats.Asn1;
using System.Runtime.InteropServices;
namespace System.Security.Cryptography.Pkcs.Asn1
{
[StructLayout(LayoutKind.Sequential)]
internal partial struct Rfc3161Accuracy
{
internal int? Seconds;
internal int? Millis;
internal int? Micros;
internal readonly void Encode(AsnWriter writer)
{
Encode(writer, Asn1Tag.Sequence);
}
internal readonly void Encode(AsnWriter writer, Asn1Tag tag)
{
writer.PushSequence(tag);
if (Seconds.HasValue)
{
writer.WriteInteger(Seconds.Value);
}
if (Millis.HasValue)
{
writer.WriteInteger(Millis.Value, new Asn1Tag(TagClass.ContextSpecific, 0));
}
if (Micros.HasValue)
{
writer.WriteInteger(Micros.Value, new Asn1Tag(TagClass.ContextSpecific, 1));
}
writer.PopSequence(tag);
}
internal static Rfc3161Accuracy Decode(ReadOnlyMemory<byte> encoded, AsnEncodingRules ruleSet)
{
return Decode(Asn1Tag.Sequence, encoded, ruleSet);
}
internal static Rfc3161Accuracy Decode(Asn1Tag expectedTag, ReadOnlyMemory<byte> encoded, AsnEncodingRules ruleSet)
{
try
{
AsnValueReader reader = new AsnValueReader(encoded.Span, ruleSet);
DecodeCore(ref reader, expectedTag, out Rfc3161Accuracy decoded);
reader.ThrowIfNotEmpty();
return decoded;
}
catch (AsnContentException e)
{
throw new CryptographicException(SR.Cryptography_Der_Invalid_Encoding, e);
}
}
internal static void Decode(ref AsnValueReader reader, out Rfc3161Accuracy decoded)
{
Decode(ref reader, Asn1Tag.Sequence, out decoded);
}
internal static void Decode(ref AsnValueReader reader, Asn1Tag expectedTag, out Rfc3161Accuracy decoded)
{
try
{
DecodeCore(ref reader, expectedTag, out decoded);
}
catch (AsnContentException e)
{
throw new CryptographicException(SR.Cryptography_Der_Invalid_Encoding, e);
}
}
private static void DecodeCore(ref AsnValueReader reader, Asn1Tag expectedTag, out Rfc3161Accuracy decoded)
{
decoded = default;
AsnValueReader sequenceReader = reader.ReadSequence(expectedTag);
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(Asn1Tag.Integer))
{
if (sequenceReader.TryReadInt32(out int tmpSeconds))
{
decoded.Seconds = tmpSeconds;
}
else
{
sequenceReader.ThrowIfNotEmpty();
}
}
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 0)))
{
if (sequenceReader.TryReadInt32(out int tmpMillis, new Asn1Tag(TagClass.ContextSpecific, 0)))
{
decoded.Millis = tmpMillis;
}
else
{
sequenceReader.ThrowIfNotEmpty();
}
}
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 1)))
{
if (sequenceReader.TryReadInt32(out int tmpMicros, new Asn1Tag(TagClass.ContextSpecific, 1)))
{
decoded.Micros = tmpMicros;
}
else
{
sequenceReader.ThrowIfNotEmpty();
}
}
sequenceReader.ThrowIfNotEmpty();
}
}
}
|