internal static void Decode(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out KeyAgreeRecipientInfoAsn decoded)
{
decoded = default;
AsnValueReader sequenceReader = reader.ReadSequence(expectedTag);
AsnValueReader explicitReader;
AsnValueReader collectionReader;
ReadOnlySpan <byte> rebindSpan = rebind.Span;
int offset;
ReadOnlySpan <byte> tmpSpan;
if (!sequenceReader.TryReadInt32(out decoded.Version))
{
sequenceReader.ThrowIfNotEmpty();
}
explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 0));
OriginatorIdentifierOrKeyAsn.Decode(ref explicitReader, rebind, out decoded.Originator);
explicitReader.ThrowIfNotEmpty();
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 1)))
{
explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 1));
if (explicitReader.TryReadPrimitiveOctetStringBytes(out tmpSpan))
{
decoded.Ukm = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray();
}
else
{
decoded.Ukm = explicitReader.ReadOctetString();
}
explicitReader.ThrowIfNotEmpty();
}
AlgorithmIdentifierAsn.Decode(ref sequenceReader, rebind, out decoded.KeyEncryptionAlgorithm);
// Decode SEQUENCE OF for RecipientEncryptedKeys
{
collectionReader = sequenceReader.ReadSequence();
var tmpList = new List <RecipientEncryptedKeyAsn>();
RecipientEncryptedKeyAsn tmpItem;
while (collectionReader.HasData)
{
RecipientEncryptedKeyAsn.Decode(ref collectionReader, rebind, out tmpItem);
tmpList.Add(tmpItem);
}
decoded.RecipientEncryptedKeys = tmpList.ToArray();
}
sequenceReader.ThrowIfNotEmpty();
}
internal static void Decode(ref AsnValueReader reader, ReadOnlyMemory <byte> rebind, out OriginatorIdentifierOrKeyAsn decoded)
{
decoded = default;
Asn1Tag tag = reader.PeekTag();
ReadOnlySpan <byte> rebindSpan = rebind.Span;
int offset;
ReadOnlySpan <byte> tmpSpan;
if (tag.HasSameClassAndValue(Asn1Tag.Sequence))
{
IssuerAndSerialNumberAsn tmpIssuerAndSerialNumber;
IssuerAndSerialNumberAsn.Decode(ref reader, rebind, out tmpIssuerAndSerialNumber);
decoded.IssuerAndSerialNumber = tmpIssuerAndSerialNumber;
}
else if (tag.HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 0)))
{
if (reader.TryReadPrimitiveOctetStringBytes(new Asn1Tag(TagClass.ContextSpecific, 0), out tmpSpan))
{
decoded.SubjectKeyIdentifier = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray();
}
else
{
decoded.SubjectKeyIdentifier = reader.ReadOctetString(new Asn1Tag(TagClass.ContextSpecific, 0));
}
}
else if (tag.HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 1)))
{
OriginatorPublicKeyAsn tmpOriginatorKey;
OriginatorPublicKeyAsn.Decode(ref reader, new Asn1Tag(TagClass.ContextSpecific, 1), rebind, out tmpOriginatorKey);
decoded.OriginatorKey = tmpOriginatorKey;
}
else
{
throw new CryptographicException();
}
}
