byte[] IGXDLMSBase.Invoke(GXDLMSSettings settings, ValueEventArgs e)
{
if (e.Index == 1)
{
if (Version == 0)
{
SecurityPolicy0 = (SecurityPolicy0)e.Parameters;
}
else
{
SecurityPolicy = (SecurityPolicy)e.Parameters;
}
}
else if (e.Index == 2)
{
try
{
foreach (List <object> item in e.Parameters as List <object> )
{
GlobalKeyType type = (GlobalKeyType)Convert.ToInt32(item[0]);
byte[] data = (byte[])item[1];
switch (type)
{
case GlobalKeyType.UnicastEncryption:
settings.Cipher.BlockCipherKey = GXDLMSSecureClient.Decrypt(settings.Kek, data);
break;
case GlobalKeyType.BroadcastEncryption:
//Invalid type
e.Error = ErrorCode.ReadWriteDenied;
break;
case GlobalKeyType.Authentication:
//if settings.Cipher is null non secure server is used.
settings.Cipher.AuthenticationKey = GXDLMSSecureClient.Decrypt(settings.Kek, data);
break;
case GlobalKeyType.Kek:
settings.Kek = GXDLMSSecureClient.Decrypt(settings.Kek, data);
break;
default:
//Invalid type
e.Error = ErrorCode.ReadWriteDenied;
break;
}
}
}
catch (Exception)
{
e.Error = ErrorCode.ReadWriteDenied;
}
}
else
{
e.Error = ErrorCode.ReadWriteDenied;
}
//Return standard reply.
return(null);
}
byte[] IGXDLMSBase.Invoke(GXDLMSSettings settings, ValueEventArgs e)
{
if (e.Index == 2)
{
foreach (object tmp in e.Parameters as object[])
{
object[] item = tmp as object[];
GlobalKeyType type = (GlobalKeyType)Convert.ToInt32(item[0]);
byte[] data = (byte[])item[1];
switch (type)
{
case GlobalKeyType.UnicastEncryption:
case GlobalKeyType.BroadcastEncryption:
//Invalid type
e.Error = ErrorCode.ReadWriteDenied;
break;
case GlobalKeyType.Authentication:
//if settings.Cipher is null non secure server is used.
settings.Cipher.AuthenticationKey = GXDLMSSecureClient.Decrypt(settings.Kek, data);
break;
case GlobalKeyType.Kek:
settings.Kek = GXDLMSSecureClient.Decrypt(settings.Kek, data);
break;
default:
//Invalid type
e.Error = ErrorCode.ReadWriteDenied;
break;
}
}
//Return standard reply.
return(null);
}
else
{
e.Error = ErrorCode.ReadWriteDenied;
return(null);
}
}
/// <summary>
/// Start to use new keys after reply is generated.
/// </summary>
/// <param name="settings">DLMS settings.</param>
/// <param name="e"></param>
internal void ApplyKeys(GXDLMSSettings settings, ValueEventArgs e)
{
try
{
foreach (List <object> item in e.Parameters as List <object> )
{
GlobalKeyType type = (GlobalKeyType)Convert.ToInt32(item[0]);
byte[] data = (byte[])item[1];
switch (type)
{
case GlobalKeyType.UnicastEncryption:
settings.Cipher.BlockCipherKey = GXDLMSSecureClient.Decrypt(settings.Kek, data);
break;
case GlobalKeyType.BroadcastEncryption:
//Invalid type
e.Error = ErrorCode.ReadWriteDenied;
break;
case GlobalKeyType.Authentication:
//if settings.Cipher is null non secure server is used.
settings.Cipher.AuthenticationKey = GXDLMSSecureClient.Decrypt(settings.Kek, data);
break;
case GlobalKeyType.Kek:
settings.Kek = GXDLMSSecureClient.Decrypt(settings.Kek, data);
break;
default:
//Invalid type
e.Error = ErrorCode.ReadWriteDenied;
break;
}
}
}
catch (Exception)
{
e.Error = ErrorCode.ReadWriteDenied;
}
}
byte[] IGXDLMSBase.Invoke(GXDLMSSettings settings, ValueEventArgs e)
{
if (e.Index == 1)
{
SecurityPolicy = (SecurityPolicy)e.Parameters;
}
else if (e.Index == 2)
{
try
{
foreach (List <object> item in e.Parameters as List <object> )
{
GlobalKeyType type = (GlobalKeyType)Convert.ToInt32(item[0]);
byte[] data = (byte[])item[1];
//if settings.Cipher is null non secure server is used.
//Keys are take in action after reply is generated.
switch (type)
{
case GlobalKeyType.UnicastEncryption:
GXDLMSSecureClient.Decrypt(settings.Kek, data);
break;
case GlobalKeyType.BroadcastEncryption:
//Invalid type
e.Error = ErrorCode.ReadWriteDenied;
break;
case GlobalKeyType.Authentication:
GXDLMSSecureClient.Decrypt(settings.Kek, data);
break;
case GlobalKeyType.Kek:
GXDLMSSecureClient.Decrypt(settings.Kek, data);
break;
default:
//Invalid type
e.Error = ErrorCode.ReadWriteDenied;
break;
}
}
}
catch (Exception)
{
e.Error = ErrorCode.ReadWriteDenied;
}
}
else if (e.Index == 3)
{
// key_agreement
try
{
List <Object> tmp = (List <Object>)(e.Parameters as List <Object>)[0];
byte keyId = (byte)tmp[0];
if (keyId != 0)
{
e.Error = ErrorCode.InconsistentClass;
}
else
{
byte[] data = (byte[])tmp[0];
// ephemeral public key
GXByteBuffer data2 = new GXByteBuffer(65);
data2.SetUInt8(keyId);
data2.Set(data, 0, 64);
GXByteBuffer sign = new GXByteBuffer();
sign.Set(data, 64, 64);
GXPublicKey pk = null;
string subject = SystemTitleToSubject(settings.SourceSystemTitle);
foreach (GXx509Certificate it in settings.Cipher.Certificates)
{
if ((it.KeyUsage & KeyUsage.DigitalSignature) != 0 && it.Subject == subject)
{
pk = it.PublicKey;
break;
}
}
if (pk == null) //TODO:|| !GXSecure.ValidateEphemeralPublicKeySignature(data2.Array(), sign.Array(), pk))
{
e.Error = ErrorCode.InconsistentClass;
settings.TargetEphemeralKey = null;
}
else
{
settings.TargetEphemeralKey = GXPublicKey.FromRawBytes(data2.SubArray(1, 64));
// Generate ephemeral keys.
KeyValuePair <GXPrivateKey, GXPublicKey> eKpS = settings.Cipher.EphemeralKeyPair;
if (eKpS.Key == null)
{
eKpS = GXEcdsa.GenerateKeyPair(GetEcc(SecuritySuite));
settings.Cipher.EphemeralKeyPair = eKpS;
}
// Generate shared secret.
return(null);
}
}
}
catch (Exception)
{
e.Error = ErrorCode.InconsistentClass;
}
}
else if (e.Index == 4)
{
// generate_key_pair
CertificateType key = (CertificateType)(int)e.Parameters;
KeyValuePair <GXPrivateKey, GXPublicKey> value = GXEcdsa.GenerateKeyPair(GetEcc(SecuritySuite));
switch (key)
{
case CertificateType.DigitalSignature:
settings.Cipher.SigningKeyPair = value;
break;
case CertificateType.KeyAgreement:
settings.Cipher.KeyAgreementKeyPair = value;
break;
default:
e.Error = ErrorCode.InconsistentClass;
break;
}
}
else if (e.Index == 5)
{
// generate_certificate_request
CertificateType key = (CertificateType)(int)e.Parameters;
try
{
KeyValuePair <GXPrivateKey, GXPublicKey> kp = default(KeyValuePair <GXPrivateKey, GXPublicKey>);
switch (key)
{
case CertificateType.DigitalSignature:
kp = settings.Cipher.SigningKeyPair;
break;
case CertificateType.KeyAgreement:
kp = settings.Cipher.KeyAgreementKeyPair;
break;
default:
break;
}
if (kp.Key != null)
{
GXPkcs10 pkc10 = GXPkcs10.CreateCertificateSigningRequest(kp, SystemTitleToSubject(settings.Cipher.SystemTitle));
return(pkc10.Encoded);
}
else
{
e.Error = ErrorCode.ReadWriteDenied;
}
}
catch (Exception)
{
e.Error = ErrorCode.ReadWriteDenied;
}
}
else if (e.Index == 6)
{
// import_certificate
GXx509Certificate cert = new GXx509Certificate((byte[])e.Parameters);
if (cert.KeyUsage == 0)
{
// At least one bit must be used.
e.Error = ErrorCode.InconsistentClass;
}
else
{
settings.Cipher.Certificates.Add(cert);
}
}
else if (e.Index == 7)
{
// export_certificate
List <Object> tmp = (List <Object>)e.Parameters;
short type = (short)tmp[0];
GXx509Certificate cert = null;
lock (settings.Cipher.Certificates)
{
if (type == 0)
{
tmp = (List <Object>)tmp[1];
cert = FindCertificateByEntity(settings, (CertificateEntity)tmp[0], (CertificateType)tmp[1], (byte[])tmp[2]);
}
else if (type == 1)
{
tmp = (List <Object>)tmp[1];
cert = FindCertificateBySerial(settings, (byte[])tmp[1], ASCIIEncoding.ASCII.GetString((byte[])tmp[2]));
}
if (cert == null)
{
e.Error = ErrorCode.InconsistentClass;
}
else
{
return(cert.Encoded);
}
}
}
else if (e.Index == 8)
{
// remove_certificate
List <Object> tmp = (List <Object>)((List <object>)e.Parameters)[0];
short type = (short)tmp[0];
GXx509Certificate cert = null;
lock (settings.Cipher.Certificates)
{
if (type == 0)
{
cert = FindCertificateByEntity(settings, (CertificateEntity)tmp[1], (CertificateType)tmp[2], (byte[])tmp[3]);
}
else if (type == 1)
{
cert = FindCertificateBySerial(settings, (byte[])tmp[1], ASCIIEncoding.ASCII.GetString((byte[])tmp[2]));
}
if (cert == null)
{
e.Error = ErrorCode.InconsistentClass;
}
else
{
settings.Cipher.Certificates.Remove(cert);
}
}
}
else
{
e.Error = ErrorCode.ReadWriteDenied;
}
//Return standard reply.
return(null);
}