public static X509Extension DecodeX509Extension(Byte[] rawData)
{
if (rawData == null)
{
throw new ArgumentNullException(nameof(rawData));
}
Asn1Reader asn = new Asn1Reader(rawData);
if (asn.Tag != 48)
{
throw new Asn1InvalidTagException(asn.Offset);
}
asn.MoveNext();
if (asn.Tag != (Byte)Asn1Type.OBJECT_IDENTIFIER)
{
throw new Asn1InvalidTagException(asn.Offset);
}
Oid oid = new Asn1ObjectIdentifier(asn).Value;
Boolean critical = false;
asn.MoveNext();
if (asn.Tag == (Byte)Asn1Type.BOOLEAN)
{
critical = Asn1Utils.DecodeBoolean(asn.GetTagRawData());
asn.MoveNext();
}
if (asn.Tag != (Byte)Asn1Type.OCTET_STRING)
{
throw new Asn1InvalidTagException(asn.Offset);
}
return(new X509Extension(oid, asn.GetPayload(), critical).ConvertExtension());
}
/// <summary>
/// Decodes ASN.1-encoded byte array to an instance of <see cref="X509Extension"/> class.
/// </summary>
/// <param name="asn">ASN.1 reader that points to the beginning of the X.509 extension structure.</param>
/// <exception cref="ArgumentNullException"><strong>asn</strong> parameter is null.</exception>
/// <exception cref="Asn1InvalidTagException">Decoder encountered an unexpected ASN.1 type identifier.</exception>
/// <returns>Decoded extension object.</returns>
public static X509Extension Decode(Asn1Reader asn)
{
if (asn.Tag != 48)
{
throw new Asn1InvalidTagException(asn.Offset);
}
Int32 offset = asn.Offset;
asn.MoveNextAndExpectTags((Byte)Asn1Type.OBJECT_IDENTIFIER);
Oid oid = new Asn1ObjectIdentifier(asn).Value;
Boolean critical = false;
asn.MoveNextAndExpectTags((Byte)Asn1Type.BOOLEAN, (Byte)Asn1Type.OCTET_STRING);
if (asn.Tag == (Byte)Asn1Type.BOOLEAN)
{
critical = Asn1Utils.DecodeBoolean(asn.GetTagRawData());
asn.MoveNextAndExpectTags((Byte)Asn1Type.OCTET_STRING);
}
// at this point ASN points to OCTET_STRING
X509Extension retValue = new X509Extension(oid, asn.GetPayload(), critical).ConvertExtension();
asn.Seek(offset);
return(retValue);
}
void decode()
{
var asn = new Asn1Reader(RawData);
if (asn.PayloadLength == 0)
{
return;
}
asn.MoveNext();
do
{
switch (asn.Tag)
{
case 0xa0:
DistributionPoint = new X509DistributionPoint(Asn1Utils.Encode(asn.GetTagRawData(), 48));
break;
case 0xa1:
OnlyUserCerts = Asn1Utils.DecodeBoolean(asn.GetPayload());
break;
case 0xa2:
OnlyCaCerts = Asn1Utils.DecodeBoolean(asn.GetPayload());
break;
case 0xa3:
var val = new Asn1BitString(asn.GetPayload());
if (val.Value.Length > 1)
{
Reasons = (X509RevocationReasonFlag)BitConverter.ToUInt16(val.Value, 0);
}
else if (val.Value.Length == 1)
{
Reasons = (X509RevocationReasonFlag)val.Value[0];
}
break;
case 0xa4:
IndirectCRL = Asn1Utils.DecodeBoolean(asn.GetPayload());
break;
case 0xa5:
OnlyAttributeCerts = Asn1Utils.DecodeBoolean(asn.GetPayload());
break;
}
} while (asn.MoveNextSibling());
}
