public static DSTU4145Params GetInstance(Object obj)
{
if (obj is DSTU4145Params)
{
return((DSTU4145Params)obj);
}
if (obj != null)
{
Asn1Sequence seq = Asn1Sequence.GetInstance(obj);
DSTU4145Params paramsValue;
if (seq.GetObjectAt(0) is DerObjectIdentifier)
{
paramsValue = new DSTU4145Params(DerObjectIdentifier.GetInstance(seq.GetObjectAt(0)));
}
else
{
paramsValue = new DSTU4145Params(DSTU4145ECBinary.GetInstance(seq.GetObjectAt(0)));
}
if (seq.Size == 2)
{
paramsValue.dke = Asn1OctetString.GetInstance(seq.GetObjectAt(1)).GetOctets();
if (paramsValue.dke.Length != DSTU4145Params.DEFAULT_DKE.Length)
{
throw new ArgumentException("object parse error");
}
}
return(paramsValue);
}
throw new ArgumentException("object parse error");
}
private DSTU4145ECBinary(Asn1Sequence seq)
{
int index = 0;
if (seq.GetObjectAt(index) is Asn1TaggedObject)
{
Asn1TaggedObject taggedVersion = (Asn1TaggedObject)seq.GetObjectAt(index);
if (taggedVersion.IsExplicit() && 0 == taggedVersion.TagNo)
{
version = DerInteger.GetInstance(taggedVersion.GetObject()).Value;
index++;
}
else
{
throw new ArgumentException("object parse error");
}
}
f = DSTU4145BinaryField.GetInstance(seq.GetObjectAt(index));
index++;
a = DerInteger.GetInstance(seq.GetObjectAt(index));
index++;
b = Asn1OctetString.GetInstance(seq.GetObjectAt(index));
index++;
n = DerInteger.GetInstance(seq.GetObjectAt(index));
index++;
bp = Asn1OctetString.GetInstance(seq.GetObjectAt(index));
}
private DSTU4145BinaryField(Asn1Sequence seq)
{
m = DerInteger.GetInstance(seq.GetObjectAt(0)).PositiveValue.IntValue;
if (seq.GetObjectAt(1) is DerInteger)
{
k = ((DerInteger)seq.GetObjectAt(1)).PositiveValue.IntValue;
}
else if (seq.GetObjectAt(1) is Asn1Sequence)
{
Asn1Sequence coefs = Asn1Sequence.GetInstance(seq.GetObjectAt(1));
k = DerInteger.GetInstance(coefs.GetObjectAt(0)).PositiveValue.IntValue;
j = DerInteger.GetInstance(coefs.GetObjectAt(1)).PositiveValue.IntValue;
l = DerInteger.GetInstance(coefs.GetObjectAt(2)).PositiveValue.IntValue;
}
else
{
throw new ArgumentException("object parse error");
}
}
