private byte[] getRandomNum(PKCS8.PrivateKeyInfo priKey)
{
foreach (ASN1 i in priKey.Attributes)
{
Asn1Reader reader = new Asn1Reader(i.GetBytes());
bool isRandomNumAttribute = false, inSET = false;
do
{
if (reader.TagName == "OBJECT_IDENTIFIER")
{
if (((Asn1ObjectIdentifier)reader.GetTagObject()).Value.Value == "1.2.410.200004.10.1.1.3")
{
isRandomNumAttribute = true;
}
}
else if (reader.TagName == "SET" && isRandomNumAttribute)
{
inSET = true;
}
else if (reader.TagName == "BIT_STRING" && inSET)
{
Asn1BitString asn1BitString = new Asn1BitString(reader);
return(asn1BitString.Value);
}
} while (reader.MoveNext());
}
throw new VIDOperationException("RandomNum in private key attributes is missing");
}
private void getVIDHash(X509Certificate2 cert, out string name, out string hashAlg, out byte[] hash)
{
// ignore warnings
name = "";
hashAlg = "";
hash = new byte[] { };
bool notset_n = true, notset_hal = true, notset_ha = true;
foreach (var ext in cert.Extensions)
{
if (ext.Oid.Value != "2.5.29.17")
{
continue;
}
Asn1Reader reader = new Asn1Reader(ext.RawData);
bool kisaIdentifyData = false, kisaVid = false; // TO-DO : Caluate Depth
do
{
switch (reader.TagName)
{
case "OBJECT_IDENTIFIER":
Asn1ObjectIdentifier identifier = (Asn1ObjectIdentifier)reader.GetTagObject();
string oid = identifier.Value.Value;
if (oid == "1.2.410.200004.10.1.1")
{
kisaIdentifyData = true;
}
else if (oid == "1.2.410.200004.10.1.1.1")
{
kisaVid = true;
}
else if (kisaVid && notset_hal)
{
hashAlg = oid;
notset_hal = false;
}
break;
case "UTF8String":
if (kisaIdentifyData && notset_n)
{
name = Encoding.UTF8.GetString(reader.GetPayload());
notset_n = false;
}
break;
case "OCTET_STRING":
if (kisaVid && notset_ha)
{
SysadminsLV.Asn1Parser.Universal.Asn1OctetString octetString = new SysadminsLV.Asn1Parser.Universal.Asn1OctetString(reader);
hash = octetString.Value;
notset_ha = false;
}
break;
default:
break;
}
} while (reader.MoveNext());
if (notset_ha || notset_hal || notset_n)
{
throw new VIDOperationException("Some of vid informations in certificate are missing");
}
}
}