private void ProcessKdcProxy(KdcProxyMessage proxyMessage, string source)
{
var message = proxyMessage.UnwrapMessage();
var kdcBody = new
{
AsReq = TryDecode(message, m => KrbAsReq.DecodeApplication(m)),
AsRep = TryDecode(message, m => KrbAsRep.DecodeApplication(m)),
TgsReq = TryDecode(message, m => KrbTgsReq.DecodeApplication(m)),
TgsRep = TryDecode(message, m => KrbTgsRep.DecodeApplication(m)),
KrbError = TryDecode(message, m => KrbError.DecodeApplication(m))
};
if (kdcBody.AsReq != null)
{
ExplodeObject(kdcBody.AsReq, $"AS-REQ ({source})");
}
else if (kdcBody.AsRep != null)
{
ExplodeObject(kdcBody.AsRep, $"AS-REP ({source})");
}
else if (kdcBody.TgsReq != null)
{
ExplodeObject(kdcBody.TgsReq, $"TGS-REQ ({source})");
}
else if (kdcBody.TgsRep != null)
{
ExplodeObject(kdcBody.TgsRep, $"TGS-REP ({source})");
}
else if (kdcBody.KrbError != null)
{
ExplodeObject(kdcBody.KrbError, $"Krb-Error ({source})");
}
}
private static KrbAsRep RequestTgt(out KrbEncryptionKey sessionKey)
{
var cred = new KerberosPasswordCredential(Upn, "P@ssw0rd!")
{
// cheating by skipping the initial leg of requesting PA-type
Salts = new[]
{
new KeyValuePair <EncryptionType, string>(
EncryptionType.AES256_CTS_HMAC_SHA1_96,
"*****@*****.**"
)
},
Configuration = Krb5Config.Default()
};
var asReq = KrbAsReq.CreateAsReq(
cred,
AuthenticationOptions.AllAuthentication
);
var handler = new KdcAsReqMessageHandler(asReq.EncodeApplication(), new KdcServerOptions
{
DefaultRealm = Realm,
IsDebug = true,
RealmLocator = realm => new FakeRealmService(realm)
});
handler.PreAuthHandlers[PaDataType.PA_ENC_TIMESTAMP] = service => new PaDataTimestampHandler(service);
var results = handler.Execute();
var decoded = KrbAsRep.DecodeApplication(results);
var decrypted = cred.DecryptKdcRep(
decoded,
KeyUsage.EncAsRepPart,
d => KrbEncAsRepPart.DecodeApplication(d)
);
sessionKey = decrypted.Key;
return(decoded);
}
