internal static void Decode(AsnReader reader, Asn1Tag expectedTag, out KeyAgreeRecipientInfoAsn decoded)
{
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
decoded = default;
AsnReader sequenceReader = reader.ReadSequence(expectedTag);
AsnReader explicitReader;
AsnReader collectionReader;
if (!sequenceReader.TryReadInt32(out decoded.Version))
{
sequenceReader.ThrowIfNotEmpty();
}
explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 0));
System.Security.Cryptography.Pkcs.Asn1.OriginatorIdentifierOrKeyAsn.Decode(explicitReader, 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 ReadOnlyMemory <byte> tmpUkm))
{
decoded.Ukm = tmpUkm;
}
else
{
decoded.Ukm = explicitReader.ReadOctetString();
}
explicitReader.ThrowIfNotEmpty();
}
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(sequenceReader, out decoded.KeyEncryptionAlgorithm);
// Decode SEQUENCE OF for RecipientEncryptedKeys
{
collectionReader = sequenceReader.ReadSequence();
var tmpList = new List <System.Security.Cryptography.Pkcs.Asn1.RecipientEncryptedKeyAsn>();
System.Security.Cryptography.Pkcs.Asn1.RecipientEncryptedKeyAsn tmpItem;
while (collectionReader.HasData)
{
System.Security.Cryptography.Pkcs.Asn1.RecipientEncryptedKeyAsn.Decode(collectionReader, out tmpItem);
tmpList.Add(tmpItem);
}
decoded.RecipientEncryptedKeys = tmpList.ToArray();
}
sequenceReader.ThrowIfNotEmpty();
}
internal static void Decode(AsnReader reader, out KeyAgreeRecipientInfoAsn decoded)
{
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
Decode(reader, Asn1Tag.Sequence, out decoded);
}
private static void DecodeCore(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));
System.Security.Cryptography.Pkcs.Asn1.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.TryReadPrimitiveOctetString(out tmpSpan))
{
decoded.Ukm = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray();
}
else
{
decoded.Ukm = explicitReader.ReadOctetString();
}
explicitReader.ThrowIfNotEmpty();
}
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref sequenceReader, rebind, out decoded.KeyEncryptionAlgorithm);
// Decode SEQUENCE OF for RecipientEncryptedKeys
{
collectionReader = sequenceReader.ReadSequence();
var tmpList = new List <System.Security.Cryptography.Pkcs.Asn1.RecipientEncryptedKeyAsn>();
System.Security.Cryptography.Pkcs.Asn1.RecipientEncryptedKeyAsn tmpItem;
while (collectionReader.HasData)
{
System.Security.Cryptography.Pkcs.Asn1.RecipientEncryptedKeyAsn.Decode(ref collectionReader, rebind, out tmpItem);
tmpList.Add(tmpItem);
}
decoded.RecipientEncryptedKeys = tmpList.ToArray();
}
sequenceReader.ThrowIfNotEmpty();
}
internal static void Decode(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out KeyAgreeRecipientInfoAsn decoded)
{
try
{
DecodeCore(ref reader, expectedTag, rebind, out decoded);
}
catch (AsnContentException e)
{
throw new CryptographicException(SR.Cryptography_Der_Invalid_Encoding, e);
}
}
internal static void Decode(ref AsnValueReader reader, ReadOnlyMemory <byte> rebind, out KeyAgreeRecipientInfoAsn decoded)
{
Decode(ref reader, Asn1Tag.Sequence, rebind, out decoded);
}
