/// <summary>
/// Parse certificate for alternate name extension.
/// </summary>
private void Parse(byte[] data)
{
if (Oid.Value != Oids.SubjectAltName &&
Oid.Value != Oids.SubjectAltName2)
{
throw new FormatException("Extension has unknown oid.");
}
Uris.Clear();
DomainNames.Clear();
IPAddresses.Clear();
var altNames = new DerOctetString(data);
var altNamesObjects = X509ExtensionUtilities.FromExtensionValue(altNames);
var generalNames =
Org.BouncyCastle.Asn1.X509.GeneralNames.GetInstance(altNamesObjects);
foreach (var generalName in generalNames.GetNames())
{
switch (generalName.TagNo)
{
case Org.BouncyCastle.Asn1.X509.GeneralName.UniformResourceIdentifier:
Uris.Add(generalName.Name.ToString());
break;
case Org.BouncyCastle.Asn1.X509.GeneralName.DnsName:
DomainNames.Add(generalName.Name.ToString());
break;
case Org.BouncyCastle.Asn1.X509.GeneralName.IPAddress:
try {
var addr = Asn1OctetString
.GetInstance(generalName.Name)
.GetOctets();
IPAddresses.Add(new IPAddress(addr).ToString());
}
catch {
throw new FormatException(
"Certificate contains invalid IP address.");
}
break;
default:
break;
}
}
}