internal static bool Parse(byte[] data, out KerberosChecksum checksum)
{
checksum = null;
try
{
KerberosChecksumGSSApi ret = new KerberosChecksumGSSApi(KerberosChecksumType.GSSAPI, data);
BinaryReader reader = new BinaryReader(new MemoryStream(data));
int binding_length = reader.ReadInt32();
ret.ChannelBinding = reader.ReadAllBytes(binding_length);
ret.ContextFlags = (KerberosChecksumGSSApiFlags)reader.ReadInt32();
if (ret.ContextFlags.HasFlagSet(KerberosChecksumGSSApiFlags.Delegate))
{
ret.DelegationOptionIdentifier = reader.ReadInt32();
int cred_length = reader.ReadInt32();
ret.KerbCredential = reader.ReadAllBytes(cred_length);
}
if (reader.RemainingLength() > 0)
{
ret.Extensions = reader.ReadToEnd();
}
checksum = ret;
return(true);
}
catch (EndOfStreamException)
{
}
return(false);
}
internal static KerberosChecksum Parse(DERValue value)
{
if (!value.CheckSequence())
{
throw new InvalidDataException();
}
KerberosChecksumType type = 0;
byte[] data = null;
foreach (var next in value.Children)
{
if (next.Type != DERTagType.ContextSpecific)
{
throw new InvalidDataException();
}
switch (next.Tag)
{
case 0:
type = (KerberosChecksumType)next.ReadChildInteger();
break;
case 1:
data = next.ReadChildOctetString();
break;
default:
throw new InvalidDataException();
}
}
if (type == 0 || data == null)
{
throw new InvalidDataException();
}
if (type == KerberosChecksumType.GSSAPI && KerberosChecksumGSSApi.Parse(data, out KerberosChecksum chksum))
{
return(chksum);
}
return(new KerberosChecksum(type, data));
}
