internal static Asn1Object CreatePrimitiveDerObject(
int tagNo,
DefiniteLengthInputStream defIn,
byte[][] tmpBuffers)
{
switch (tagNo)
{
case Asn1Tags.Boolean:
throw new IOException("invalid ECDSA sig");
case Asn1Tags.Enumerated:
throw new IOException("invalid ECDSA sig");
case Asn1Tags.ObjectIdentifier:
return(DerObjectIdentifier.FromOctetString(GetBuffer(defIn, tmpBuffers)));
}
byte[] bytes = defIn.ToArray();
switch (tagNo)
{
case Asn1Tags.Integer:
return(new DerInteger(bytes));
case Asn1Tags.OctetString:
return(new DerOctetString(bytes));
case Asn1Tags.Null:
return(DerNull.Instance); // actual content is ignored (enforce 0 length?)
default:
throw new IOException("unknown tag " + tagNo + " encountered");
}
}
internal static byte[] GetBuffer(DefiniteLengthInputStream defIn, byte[][] tmpBuffers)
{
int len = defIn.GetRemaining();
if (len >= tmpBuffers.Length)
{
return(defIn.ToArray());
}
byte[] buf = tmpBuffers[len];
if (buf == null)
{
buf = tmpBuffers[len] = new byte[len];
}
defIn.ReadAllIntoByteArray(buf);
return(buf);
}
