public void OnValueChanged(GXDLMSViewArguments arg)
{
if (arg.Index == 2)
{
if (arg.Value is byte[] && (arg.Value as byte[]).Length == 6)
{
GXBitString bs = new GXBitString(GXBitString.ToBitString((byte[])arg.Value, 0, 16));
int val = Convert.ToUInt16(bs);
ValuesLb.ItemCheck -= ValuesLb_ItemCheck;
for (int pos = 0; pos != 16; ++pos)
{
ValuesLb.SetItemChecked(pos, bs.Value[pos] == '1');
}
ValuesLb.ItemCheck += ValuesLb_ItemCheck;
GXByteBuffer bb = new GXByteBuffer((byte[])arg.Value);
bb.Position = 2;
DurationTb.Text = bb.GetUInt32().ToString();
HexTb.Text = bb.ToString();
}
else
{
DurationTb.Text = HexTb.Text = "";
ValuesLb.ItemCheck -= ValuesLb_ItemCheck;
for (int pos = 0; pos != 16; ++pos)
{
ValuesLb.SetItemChecked(pos, false);
}
ValuesLb.ItemCheck += ValuesLb_ItemCheck;
}
}
else
{
throw new IndexOutOfRangeException("index");
}
}
/// <summary>
/// Get values from byte buffer.
/// </summary>
/// <param name="value"></param>
private void FromByteBuffer(GXByteBuffer value)
{
for (int pos = value.Size - 4; pos > -1; pos = pos - 4)
{
Add(value.GetUInt32(pos));
}
switch (value.Size % 4)
{
case 1:
Add(value.GetUInt8());
break;
case 2:
Add(value.GetUInt16());
break;
case 3:
// Data.Add(value.GetUInt24());
break;
default:
break;
}
changed = true;
}
private static UInt32 FromAddressString(string value)
{
if (string.IsNullOrEmpty(value))
{
return(0);
}
GXByteBuffer bb = new GXByteBuffer(System.Net.IPAddress.Parse(value).GetAddressBytes());
return(bb.GetUInt32());
}
private static UInt32 FromAddressString(IPAddress value)
{
if (value == null)
{
return(0);
}
GXByteBuffer bb = new GXByteBuffer(value.GetAddressBytes());
return(bb.GetUInt32());
}
byte[] IGXDLMSBase.Invoke(GXDLMSSettings settings, int index, Object parameters)
{
//Check reply_to_HLS_authentication
if (index == 1)
{
UInt32 ic = 0;
byte[] secret;
if (settings.Authentication == Authentication.HighGMAC)
{
secret = settings.SourceSystemTitle;
GXByteBuffer bb = new GXByteBuffer(parameters as byte[]);
bb.GetUInt8();
ic = bb.GetUInt32();
}
else
{
secret = Secret;
}
byte[] serverChallenge = GXSecure.Secure(settings, settings.Cipher, ic, settings.StoCChallenge, secret);
byte[] clientChallenge = (byte[])parameters;
if (GXCommon.Compare(serverChallenge, clientChallenge))
{
if (settings.Authentication == Authentication.HighGMAC)
{
secret = settings.Cipher.SystemTitle;
}
else
{
secret = Secret;
}
ic = settings.Cipher.FrameCounter;
byte[] tmp = GXSecure.Secure(settings, settings.Cipher, ic, settings.CtoSChallenge, secret);
GXByteBuffer challenge = new GXByteBuffer();
// ReturnParameters.
challenge.SetUInt8(1);
challenge.SetUInt8(0);
challenge.SetUInt8((byte)DataType.OctetString);
GXCommon.SetObjectCount(tmp.Length, challenge);
challenge.Set(tmp);
return(challenge.Array());
}
else
{
throw new ArgumentException("Invoke failed. Invalid attribute index.");
}
}
else
{
throw new ArgumentException("Invoke failed. Invalid attribute index.");
}
}
byte[] IGXDLMSBase.Invoke(GXDLMSSettings settings, ValueEventArgs e)
{
//Check reply_to_HLS_authentication
if (e.Index == 8)
{
UInt32 ic = 0;
byte[] secret;
if (settings.Authentication == Authentication.HighGMAC)
{
secret = settings.SourceSystemTitle;
GXByteBuffer bb = new GXByteBuffer(e.Parameters as byte[]);
bb.GetUInt8();
ic = bb.GetUInt32();
}
else
{
secret = Secret;
}
byte[] serverChallenge = GXSecure.Secure(settings, settings.Cipher, ic, settings.StoCChallenge, secret);
byte[] clientChallenge = (byte[])e.Parameters;
if (GXCommon.Compare(serverChallenge, clientChallenge))
{
if (settings.Authentication == Authentication.HighGMAC)
{
secret = settings.Cipher.SystemTitle;
ic = settings.Cipher.InvocationCounter;
}
else
{
secret = Secret;
}
settings.Connected = true;
return(GXSecure.Secure(settings, settings.Cipher, ic, settings.CtoSChallenge, secret));
}
else
{
// If the password does not match.
settings.Connected = false;
return(null);
}
}
else
{
e.Error = ErrorCode.ReadWriteDenied;
return(null);
}
}
/// <summary>
/// Decrypt data.
/// </summary>
/// <param name="p">Decryption parameters</param>
/// <returns>Decrypted data.</returns>
public static byte[] DecryptAesGcm(AesGcmParameter p, GXByteBuffer data)
{
if (data == null || data.Size < 2)
{
throw new ArgumentOutOfRangeException("cryptedData");
}
byte[] tmp;
int len;
Command cmd = (Command)data.GetUInt8();
switch (cmd)
{
case Command.GeneralGloCiphering:
case Command.GeneralDedCiphering:
len = GXCommon.GetObjectCount(data);
if (len != 0)
{
p.SystemTitle = new byte[len];
data.Get(p.SystemTitle);
if (p.Xml != null && p.Xml.Comments)
{
p.Xml.AppendComment(GXCommon.SystemTitleToString(Standard.DLMS, p.SystemTitle));
}
}
if (p.SystemTitle == null || p.SystemTitle.Length != 8)
{
if (p.Xml == null)
{
throw new ArgumentNullException("Invalid sender system title.");
}
else
{
p.Xml.AppendComment("Invalid sender system title.");
}
}
break;
case Command.GeneralCiphering:
case Command.GloInitiateRequest:
case Command.GloInitiateResponse:
case Command.GloReadRequest:
case Command.GloReadResponse:
case Command.GloWriteRequest:
case Command.GloWriteResponse:
case Command.GloGetRequest:
case Command.GloGetResponse:
case Command.GloSetRequest:
case Command.GloSetResponse:
case Command.GloMethodRequest:
case Command.GloMethodResponse:
case Command.GloEventNotification:
case Command.DedInitiateRequest:
case Command.DedInitiateResponse:
case Command.DedGetRequest:
case Command.DedGetResponse:
case Command.DedSetRequest:
case Command.DedSetResponse:
case Command.DedMethodRequest:
case Command.DedMethodResponse:
case Command.DedEventNotification:
case Command.DedReadRequest:
case Command.DedReadResponse:
case Command.DedWriteRequest:
case Command.DedWriteResponse:
case Command.GloConfirmedServiceError:
case Command.DedConfirmedServiceError:
break;
default:
throw new ArgumentOutOfRangeException("cryptedData");
}
int value = 0;
UInt64 transactionId = 0;
if (cmd == Command.GeneralCiphering)
{
len = GXCommon.GetObjectCount(data);
tmp = new byte[len];
data.Get(tmp);
GXByteBuffer t = new GXByteBuffer(tmp);
transactionId = t.GetUInt64();
len = GXCommon.GetObjectCount(data);
if (len != 0)
{
tmp = new byte[len];
data.Get(tmp);
p.SystemTitle = tmp;
}
if (p.SystemTitle == null || p.SystemTitle.Length != 8)
{
if (p.Xml == null)
{
throw new ArgumentNullException("Invalid sender system title.");
}
else
{
p.Xml.AppendComment("Invalid sender system title.");
}
}
len = GXCommon.GetObjectCount(data);
tmp = new byte[len];
data.Get(tmp);
p.RecipientSystemTitle = tmp;
// Get date time.
len = GXCommon.GetObjectCount(data);
if (len != 0)
{
tmp = new byte[len];
data.Get(tmp);
p.DateTime = tmp;
}
// other-information
len = data.GetUInt8();
if (len != 0)
{
tmp = new byte[len];
data.Get(tmp);
p.OtherInformation = tmp;
}
// KeyInfo OPTIONAL
len = data.GetUInt8();
// AgreedKey CHOICE tag.
data.GetUInt8();
// key-parameters
len = data.GetUInt8();
value = data.GetUInt8();
p.KeyParameters = value;
if (value == 1)
{
// KeyAgreement.ONE_PASS_DIFFIE_HELLMAN
// key-ciphered-data
len = GXCommon.GetObjectCount(data);
tmp = new byte[len];
data.Get(tmp);
p.KeyCipheredData = tmp;
}
else if (value == 2)
{
// KeyAgreement.STATIC_UNIFIED_MODEL
len = GXCommon.GetObjectCount(data);
if (len != 0)
{
throw new ArgumentException("Invalid key parameters");
}
}
else
{
throw new ArgumentException("key-parameters");
}
}
len = GXCommon.GetObjectCount(data);
p.CipheredContent = data.Remaining();
byte sc = (byte)data.GetUInt8();
Enums.Security security = (Enums.Security)(sc & 0x30);
if ((sc & 0x80) != 0)
{
System.Diagnostics.Debug.WriteLine("Compression is used.");
}
if ((sc & 0x40) != 0)
{
System.Diagnostics.Debug.WriteLine("Error: Key_Set is used.");
}
if ((sc & 0x20) != 0)
{
System.Diagnostics.Debug.WriteLine("Encryption is applied.");
}
SecuritySuite ss = (SecuritySuite)(sc & 0x3);
p.Security = (byte)security;
UInt32 invocationCounter = data.GetUInt32();
p.InvocationCounter = invocationCounter;
if (ss == SecuritySuite.Version2)
{
throw new NotImplementedException("Security Suite 2 is not implemented.");
}
System.Diagnostics.Debug.WriteLine("Decrypt settings: " + p.ToString());
System.Diagnostics.Debug.WriteLine("Encrypted: " + GXCommon.ToHex(data.Data,
false, data.Position, data.Size - data.Position));
byte[] tag = new byte[12];
byte[] encryptedData;
int length;
if (security == Enums.Security.Authentication)
{
length = data.Size - data.Position - 12;
encryptedData = new byte[length];
data.Get(encryptedData);
data.Get(tag);
// Check tag.
EncryptAesGcm(p, encryptedData);
if (!GXDLMSChipperingStream.TagsEquals(tag, p.CountTag))
{
if (transactionId != 0)
{
p.InvocationCounter = transactionId;
}
if (p.Xml == null)
{
throw new GXDLMSException("Decrypt failed. Invalid tag.");
}
else
{
p.Xml.AppendComment("Decrypt failed. Invalid tag.");
}
}
return(encryptedData);
}
byte[] ciphertext = null;
if (security == Enums.Security.Encryption)
{
length = data.Size - data.Position;
ciphertext = new byte[length];
data.Get(ciphertext);
}
else if (security == Enums.Security.AuthenticationEncryption)
{
length = data.Size - data.Position - 12;
ciphertext = new byte[length];
data.Get(ciphertext);
data.Get(tag);
}
byte[] aad = GetAuthenticatedData(p, ciphertext),
iv = GetNonse(invocationCounter, p.SystemTitle);
GXDLMSChipperingStream gcm = new GXDLMSChipperingStream((byte)security, true,
p.BlockCipherKey, aad, iv, tag);
gcm.Write(ciphertext);
if (transactionId != 0)
{
p.InvocationCounter = transactionId;
}
return(gcm.FlushFinalBlock());
}
/// <summary>
/// Decrypt data.
/// </summary>
/// <param name="p">Decryption parameters</param>
/// <returns>Decrypted data.</returns>
public static byte[] DecryptAesGcm(AesGcmParameter p, GXByteBuffer data)
{
if (data == null || data.Size < 2)
{
throw new ArgumentOutOfRangeException("cryptedData");
}
byte[] tmp;
int len;
Command cmd = (Command)data.GetUInt8();
switch (cmd)
{
case Command.GeneralGloCiphering:
len = GXCommon.GetObjectCount(data);
if (len != 0)
{
p.SystemTitle = new byte[len];
data.Get(p.SystemTitle);
}
break;
case Command.GeneralCiphering:
case Command.GloInitiateRequest:
case Command.GloInitiateResponse:
case Command.GloReadRequest:
case Command.GloReadResponse:
case Command.GloWriteRequest:
case Command.GloWriteResponse:
case Command.GloGetRequest:
case Command.GloGetResponse:
case Command.GloSetRequest:
case Command.GloSetResponse:
case Command.GloMethodRequest:
case Command.GloMethodResponse:
case Command.GloEventNotificationRequest:
break;
default:
throw new ArgumentOutOfRangeException("cryptedData");
}
int value = 0;
UInt64 transactionId = 0;
if (cmd == Command.GeneralCiphering)
{
len = GXCommon.GetObjectCount(data);
tmp = new byte[len];
data.Get(tmp);
GXByteBuffer t = new GXByteBuffer(tmp);
transactionId = t.GetUInt64();
len = GXCommon.GetObjectCount(data);
tmp = new byte[len];
data.Get(tmp);
p.SystemTitle = tmp;
len = GXCommon.GetObjectCount(data);
tmp = new byte[len];
data.Get(tmp);
p.RecipientSystemTitle = tmp;
// Get date time.
len = GXCommon.GetObjectCount(data);
if (len != 0)
{
tmp = new byte[len];
data.Get(tmp);
p.DateTime = tmp;
}
// other-information
len = data.GetUInt8();
if (len != 0)
{
tmp = new byte[len];
data.Get(tmp);
p.OtherInformation = tmp;
}
// KeyInfo OPTIONAL
len = data.GetUInt8();
// AgreedKey CHOICE tag.
data.GetUInt8();
// key-parameters
len = data.GetUInt8();
value = data.GetUInt8();
p.KeyParameters = value;
if (value == 1)
{
// KeyAgreement.ONE_PASS_DIFFIE_HELLMAN
// key-ciphered-data
len = GXCommon.GetObjectCount(data);
tmp = new byte[len];
data.Get(tmp);
p.KeyCipheredData = tmp;
}
else if (value == 2)
{
// KeyAgreement.STATIC_UNIFIED_MODEL
len = GXCommon.GetObjectCount(data);
if (len != 0)
{
throw new ArgumentException("Invalid key parameters");
}
}
else
{
throw new ArgumentException("key-parameters");
}
}
len = GXCommon.GetObjectCount(data);
p.CipheredContent = data.Remaining();
byte sc = (byte)data.GetUInt8();
Enums.Security security = (Enums.Security)(sc & 0x30);
SecuritySuite ss = (SecuritySuite)(sc & 0x3);
p.Security = security;
UInt32 invocationCounter = data.GetUInt32();
p.InvocationCounter = invocationCounter;
if (ss != SecuritySuite.AesGcm128)
{
throw new NotImplementedException("Security Suite 1 is not implemented.");
}
System.Diagnostics.Debug.WriteLine("Decrypt settings: " + p.ToString());
System.Diagnostics.Debug.WriteLine("Encrypted: " + GXCommon.ToHex(data.Data,
false, data.Position, data.Size - data.Position));
byte[] tag = new byte[12];
byte[] encryptedData;
int length;
if (security == Enums.Security.Authentication)
{
length = data.Size - data.Position - 12;
encryptedData = new byte[length];
data.Get(encryptedData);
data.Get(tag);
// Check tag.
EncryptAesGcm(p, encryptedData);
if (!GXDLMSChipperingStream.TagsEquals(tag, p.CountTag))
{
if (transactionId != 0)
{
p.InvocationCounter = transactionId;
}
throw new GXDLMSException("Decrypt failed. Invalid tag.");
}
return(encryptedData);
}
byte[] ciphertext = null;
if (security == Enums.Security.Encryption)
{
length = data.Size - data.Position;
ciphertext = new byte[length];
data.Get(ciphertext);
}
else if (security == Enums.Security.AuthenticationEncryption)
{
length = data.Size - data.Position - 12;
ciphertext = new byte[length];
data.Get(ciphertext);
data.Get(tag);
}
byte[] aad = GetAuthenticatedData(p, ciphertext),
iv = GetNonse(invocationCounter, p.SystemTitle);
GXDLMSChipperingStream gcm = new GXDLMSChipperingStream(security, true,
p.BlockCipherKey, aad, iv, tag);
gcm.Write(ciphertext);
if (transactionId != 0)
{
p.InvocationCounter = transactionId;
}
return(gcm.FlushFinalBlock());
/*
* len = Gurux.DLMS.Internal.GXCommon.GetObjectCount(data);
* p.Security = (Gurux.DLMS.Enums.Security)data.GetUInt8();
* p.InvocationCounter = data.GetUInt32();
* System.Diagnostics.Debug.WriteLine("Decrypt settings: " + p.ToString());
* System.Diagnostics.Debug.WriteLine("Encrypted: " + GXCommon.ToHex(data.Array(), true));
*
* byte[] tag = new byte[12];
* byte[] encryptedData;
* int length;
* if (p.Security == Gurux.DLMS.Enums.Security.Authentication)
* {
* length = data.Size - data.Position - 12;
* encryptedData = new byte[length];
* data.Get(encryptedData);
* data.Get(tag);
* // Check tag.
* EncryptAesGcm(p, encryptedData);
* if (!GXDLMSChipperingStream.TagsEquals(tag, p.CountTag))
* {
* throw new GXDLMSException("Decrypt failed. Invalid tag.");
* }
* return encryptedData;
* }
* byte[] ciphertext = null;
* if (p.Security == Gurux.DLMS.Enums.Security.Encryption)
* {
* length = data.Size - data.Position;
* ciphertext = new byte[length];
* data.Get(ciphertext);
* }
* else if (p.Security == Gurux.DLMS.Enums.Security.AuthenticationEncryption)
* {
* length = data.Size - data.Position - 12;
* ciphertext = new byte[length];
* data.Get(ciphertext);
* data.Get(tag);
* }
* byte[] aad = GetAuthenticatedData(p.Security, p.AuthenticationKey, ciphertext);
* byte[] iv = GetNonse(p.InvocationCounter, p.SystemTitle);
* GXDLMSChipperingStream gcm = new GXDLMSChipperingStream(p.Security, true, p.BlockCipherKey, aad, iv, tag);
* gcm.Write(ciphertext);
* ciphertext = gcm.FlushFinalBlock();
* if (p.Security == Gurux.DLMS.Enums.Security.AuthenticationEncryption)
* {
* // Check tag.
* EncryptAesGcm(p, ciphertext);
* if (!GXDLMSChipperingStream.TagsEquals(tag, p.CountTag))
* {
* // throw new GXDLMSException("Decrypt failed. Invalid tag.");
* }
* }
* return ciphertext;
*/
}
void IGXDLMSBase.SetValue(GXDLMSSettings settings, ValueEventArgs e)
{
if (e.Index == 1)
{
LogicalName = GXCommon.ToLogicalName(e.Value);
}
else if (e.Index == 2)
{
ObjectList.Clear();
if (e.Value != null)
{
foreach (Object[] item in (Object[])e.Value)
{
ObjectType type = (ObjectType)Convert.ToInt32(item[0]);
int version = Convert.ToInt32(item[1]);
String ln = GXCommon.ToLogicalName((byte[])item[2]);
GXDLMSObject obj = null;
if (settings.Objects != null)
{
obj = settings.Objects.FindByLN(type, ln);
}
if (obj == null)
{
obj = Gurux.DLMS.GXDLMSClient.CreateObject(type);
obj.LogicalName = ln;
obj.Version = version;
}
//Unknown objects are not shown.
if (obj is IGXDLMSBase && item[3] != null)
{
UpdateAccessRights(obj, (Object[])item[3]);
ObjectList.Add(obj);
}
}
}
}
else if (e.Index == 3)
{
if (e.Value != null)
{
ClientSAP = Convert.ToByte(((Object[])e.Value)[0]);
ServerSAP = Convert.ToUInt16(((Object[])e.Value)[1]);
}
}
else if (e.Index == 4)
{
//Value of the object identifier encoded in BER
if (e.Value is byte[])
{
GXByteBuffer arr = new GXByteBuffer(e.Value as byte[]);
if (arr.GetUInt8(0) == 0x60)
{
ApplicationContextName.JointIsoCtt = 0;
++arr.Position;
ApplicationContextName.Country = 0;
++arr.Position;
ApplicationContextName.CountryName = 0;
++arr.Position;
ApplicationContextName.IdentifiedOrganization = arr.GetUInt8();
ApplicationContextName.DlmsUA = arr.GetUInt8();
ApplicationContextName.ApplicationContext = arr.GetUInt8();
ApplicationContextName.ContextId = arr.GetUInt8();
}
else
{
//Get Tag and Len.
if (arr.GetUInt8() != (int)BerType.Integer && arr.GetUInt8() != 7)
{
throw new ArgumentOutOfRangeException();
}
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
ApplicationContextName.JointIsoCtt = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
ApplicationContextName.Country = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x12)
{
throw new ArgumentOutOfRangeException();
}
ApplicationContextName.CountryName = arr.GetUInt16();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
ApplicationContextName.IdentifiedOrganization = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
ApplicationContextName.DlmsUA = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
ApplicationContextName.ApplicationContext = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
ApplicationContextName.ContextId = arr.GetUInt8();
}
}
else if (e.Value != null)
{
Object[] arr = (Object[])e.Value;
ApplicationContextName.JointIsoCtt = Convert.ToByte(arr[0]);
ApplicationContextName.Country = Convert.ToByte(arr[1]);
ApplicationContextName.CountryName = Convert.ToUInt16(arr[2]);
ApplicationContextName.IdentifiedOrganization = Convert.ToByte(arr[3]);
ApplicationContextName.DlmsUA = Convert.ToByte(arr[4]);
ApplicationContextName.ApplicationContext = Convert.ToByte(arr[5]);
ApplicationContextName.ContextId = Convert.ToByte(arr[6]);
}
}
else if (e.Index == 5)
{
if (e.Value != null)
{
Object[] arr = (Object[])e.Value;
GXByteBuffer bb = new GXByteBuffer();
GXCommon.SetBitString(bb, arr[0]);
bb.SetUInt8(0, 0);
XDLMSContextInfo.Conformance = (Conformance)bb.GetUInt32();
XDLMSContextInfo.MaxReceivePduSize = Convert.ToUInt16(arr[1]);
XDLMSContextInfo.MaxSendPduSize = Convert.ToUInt16(arr[2]);
XDLMSContextInfo.DlmsVersionNumber = Convert.ToByte(arr[3]);
XDLMSContextInfo.QualityOfService = Convert.ToSByte(arr[4]);
XDLMSContextInfo.CypheringInfo = (byte[])arr[5];
}
}
else if (e.Index == 6)
{
//Value of the object identifier encoded in BER
if (e.Value is byte[])
{
GXByteBuffer arr = new GXByteBuffer(e.Value as byte[]);
if (arr.GetUInt8(0) == 0x60)
{
AuthenticationMechanismName.JointIsoCtt = 0;
++arr.Position;
AuthenticationMechanismName.Country = 0;
++arr.Position;
AuthenticationMechanismName.CountryName = 0;
++arr.Position;
AuthenticationMechanismName.IdentifiedOrganization = arr.GetUInt8();
AuthenticationMechanismName.DlmsUA = arr.GetUInt8();
AuthenticationMechanismName.AuthenticationMechanismName = arr.GetUInt8();
AuthenticationMechanismName.MechanismId = (Authentication)arr.GetUInt8();
}
else
{
//Get Tag and Len.
if (arr.GetUInt8() != (int)BerType.Integer && arr.GetUInt8() != 7)
{
throw new ArgumentOutOfRangeException();
}
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
AuthenticationMechanismName.JointIsoCtt = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
AuthenticationMechanismName.Country = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x12)
{
throw new ArgumentOutOfRangeException();
}
AuthenticationMechanismName.CountryName = arr.GetUInt16();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
AuthenticationMechanismName.IdentifiedOrganization = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
AuthenticationMechanismName.DlmsUA = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
AuthenticationMechanismName.AuthenticationMechanismName = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
AuthenticationMechanismName.MechanismId = (Authentication)arr.GetUInt8();
}
}
else if (e.Value != null)
{
Object[] arr = (Object[])e.Value;
AuthenticationMechanismName.JointIsoCtt = Convert.ToByte(arr[0]);
AuthenticationMechanismName.Country = Convert.ToByte(arr[1]);
AuthenticationMechanismName.CountryName = Convert.ToUInt16(arr[2]);
AuthenticationMechanismName.IdentifiedOrganization = Convert.ToByte(arr[3]);
AuthenticationMechanismName.DlmsUA = Convert.ToByte(arr[4]);
AuthenticationMechanismName.AuthenticationMechanismName = Convert.ToByte(arr[5]);
AuthenticationMechanismName.MechanismId = (Authentication)Convert.ToByte(arr[6]);
}
}
else if (e.Index == 7)
{
Secret = (byte[])e.Value;
}
else if (e.Index == 8)
{
if (e.Value == null)
{
AssociationStatus = AssociationStatus.NonAssociated;
}
else
{
AssociationStatus = (AssociationStatus)Convert.ToInt32(e.Value);
}
}
else if (e.Index == 9)
{
SecuritySetupReference = GXCommon.ToLogicalName(e.Value);
}
else
{
e.Error = ErrorCode.ReadWriteDenied;
}
}
byte[] IGXDLMSBase.Invoke(GXDLMSSettings settings, ValueEventArgs e)
{
//Check reply_to_HLS_authentication
if (e.Index == 8)
{
UInt32 ic = 0;
byte[] secret;
if (settings.Authentication == Authentication.HighGMAC)
{
secret = settings.SourceSystemTitle;
GXByteBuffer bb = new GXByteBuffer(e.Parameters as byte[]);
bb.GetUInt8();
ic = bb.GetUInt32();
}
else
{
secret = HlsSecret;
}
byte[] serverChallenge = GXSecure.Secure(settings, settings.Cipher, ic, settings.StoCChallenge, secret);
byte[] clientChallenge = (byte[])e.Parameters;
if (GXCommon.Compare(serverChallenge, clientChallenge))
{
if (settings.Authentication == Authentication.HighGMAC)
{
secret = settings.Cipher.SystemTitle;
ic = settings.Cipher.FrameCounter;
}
else
{
secret = HlsSecret;
}
settings.Connected = true;
return GXSecure.Secure(settings, settings.Cipher, ic, settings.CtoSChallenge, secret);
}
else
{
// If the password does not match.
settings.Connected = false;
return null;
}
}
else
{
e.Error = ErrorCode.ReadWriteDenied;
return null;
}
}
/// <summary>
/// Parse User Information from PDU.
/// </summary>
public static void ParseUserInformation(GXDLMSSettings settings, GXICipher cipher, GXByteBuffer data, GXDLMSTranslatorStructure xml)
{
byte len = data.GetUInt8();
GXByteBuffer tmp2 = new GXByteBuffer();
tmp2.SetUInt8(0);
if (data.Size - data.Position < len)
{
throw new Exception("Not enough data.");
}
if (xml != null && xml.OutputType == TranslatorOutputType.StandardXml)
{
len = (byte)(data.Size - data.Position);
xml.AppendLine(Command.InitiateRequest, null, GXCommon
.ToHex(data.Data, false, data.Position, len));
data.Position = data.Position + len;
return;
}
//Excoding the choice for user information
int tag = data.GetUInt8();
if (tag != 0x4)
{
throw new Exception("Invalid tag.");
}
len = data.GetUInt8();
//Tag for xDLMS-Initate.response
tag = data.GetUInt8();
if (tag == (byte)Command.GloInitiateResponse)
{
if (xml != null)
{
int cnt = GXCommon.GetObjectCount(data);
byte[] tmp = new byte[cnt];
data.Get(tmp);
//<glo_InitiateResponse>
xml.AppendLine(Command.GloInitiateResponse, "Value", GXCommon.ToHex(tmp, false));
return;
}
--data.Position;
cipher.Security = cipher.Decrypt(settings.SourceSystemTitle, data);
tag = data.GetUInt8();
}
else if (tag == (byte)Command.GloInitiateRequest)
{
if (xml != null)
{
int cnt = GXCommon.GetObjectCount(data);
byte[] tmp = new byte[cnt];
data.Get(tmp);
//<glo_InitiateRequest>
xml.AppendLine(Command.GloInitiateRequest, "Value", GXCommon.ToHex(tmp, false));
return;
}
--data.Position;
cipher.Security = cipher.Decrypt(settings.SourceSystemTitle, data);
tag = data.GetUInt8();
}
bool response = tag == (byte)Command.InitiateResponse;
if (response)
{
if (xml != null)
{
//<InitiateResponse>
xml.AppendStartTag(Command.InitiateResponse);
}
//Optional usage field of the negotiated quality of service component
tag = data.GetUInt8();
len = 0;
if (tag != 0)//Skip if used.
{
len = data.GetUInt8();
data.Position += len;
if (len == 0 && xml != null)
{
//NegotiatedQualityOfService
xml.AppendLine(TranslatorGeneralTags.NegotiatedQualityOfService, "Value", "00");
}
}
}
else if (tag == (byte)Command.InitiateRequest)
{
if (xml != null)
{
//<InitiateRequest>
xml.AppendStartTag(Command.InitiateRequest);
}
//Optional usage field of the negotiated quality of service component
tag = data.GetUInt8();
//CtoS.
if (tag != 0)
{
len = data.GetUInt8();
settings.CtoSChallenge = new byte[len];
data.Get(settings.CtoSChallenge);
}
//Optional usage field of the negotiated quality of service component
tag = data.GetUInt8();
if (tag != 0)//Skip if used.
{
len = data.GetUInt8();
data.Position += len;
}
//Optional usage field of the proposed quality of service component
tag = data.GetUInt8();
if (tag != 0)//Skip if used.
{
len = data.GetUInt8();
data.Position += len;
}
}
else
{
throw new Exception("Invalid tag.");
}
//Get DLMS version number.
if (!response)
{
if (data.GetUInt8() != 6)
{
throw new Exception("Invalid DLMS version number.");
}
//ProposedDlmsVersionNumber
if (xml != null)
{
xml.AppendLine(TranslatorGeneralTags.ProposedDlmsVersionNumber, "Value", xml.IntegerToHex(settings.DLMSVersion, 2));
}
}
else
{
if (data.GetUInt8() != 6)
{
throw new Exception("Invalid DLMS version number.");
}
if (xml != null)
{
xml.AppendLine(TranslatorGeneralTags.NegotiatedDlmsVersionNumber, "Value", xml.IntegerToHex(settings.DLMSVersion, 2));
}
}
//Tag for conformance block
tag = data.GetUInt8();
if (tag != 0x5F)
{
throw new Exception("Invalid tag.");
}
//Old Way...
if (data.GetUInt8(data.Position) == 0x1F)
{
data.GetUInt8();
}
len = data.GetUInt8();
//The number of unused bits in the bit string.
tag = data.GetUInt8();
if (!response)
{
//ProposedConformance
if (xml != null)
{
xml.AppendStartTag(TranslatorGeneralTags.ProposedConformance);
}
data.Get(settings.ConformanceBlock);
tmp2.Set(settings.ConformanceBlock);
}
else
{
//NegotiatedConformance
if (xml != null)
{
xml.AppendStartTag(TranslatorGeneralTags.NegotiatedConformance);
}
if (settings.UseLogicalNameReferencing)
{
data.Get(settings.LnSettings.ConformanceBlock);
tmp2.Set(settings.LnSettings.ConformanceBlock);
}
else
{
data.Get(settings.SnSettings.ConformanceBlock);
tmp2.Set(settings.SnSettings.ConformanceBlock);
}
}
if (xml != null)
{
GetConformance(tmp2.GetUInt32(), xml);
}
if (!response)
{
//Proposed max PDU size.
settings.MaxPduSize = data.GetUInt16();
if (xml != null)
{
//ProposedConformance closing
xml.AppendEndTag(TranslatorGeneralTags.ProposedConformance);
//ProposedMaxPduSize
xml.AppendLine(TranslatorGeneralTags.ProposedMaxPduSize, "Value", xml.IntegerToHex(settings.MaxPduSize, 4));
}
//If client asks too high PDU.
if (settings.MaxPduSize > settings.MaxServerPDUSize)
{
settings.MaxPduSize = settings.MaxServerPDUSize;
}
}
else
{
//Max PDU size.
settings.MaxPduSize = data.GetUInt16();
if (xml != null)
{
//NegotiatedConformance closing
xml.AppendEndTag(TranslatorGeneralTags.NegotiatedConformance);
//NegotiatedMaxPduSize
xml.AppendLine(TranslatorGeneralTags.NegotiatedMaxPduSize, "Value", xml.IntegerToHex(settings.MaxPduSize, 4));
}
}
if (response)
{
//VAA Name
tag = data.GetUInt16();
if (xml != null)
{
xml.AppendLine(TranslatorGeneralTags.VaaName, "Value", xml.IntegerToHex(tag, 4));
}
if (tag == 0x0007)
{
// If LN
if (!settings.UseLogicalNameReferencing)
{
throw new ArgumentException("Invalid VAA.");
}
}
else if (tag == 0xFA00)
{
// If SN
if (settings.UseLogicalNameReferencing)
{
throw new ArgumentException("Invalid VAA.");
}
}
else
{
// Unknown VAA.
throw new ArgumentException("Invalid VAA.");
}
if (xml != null)
{
//<InitiateResponse>
xml.AppendEndTag(Command.InitiateResponse);
}
}
else if (xml != null)
{
//</InitiateRequest>
xml.AppendEndTag(Command.InitiateRequest);
}
}
/// <summary>
/// Decrypt data.
/// </summary>
/// <param name="p">Decryption parameters</param>
/// <returns>Decrypted data.</returns>
public static byte[] DecryptAesGcm(AesGcmParameter p, GXByteBuffer data)
{
if (data == null || data.Size < 2)
{
throw new ArgumentOutOfRangeException("cryptedData");
}
int len;
Command cmd = (Command)data.GetUInt8();
switch (cmd)
{
case Command.GeneralGloCiphering:
len = GXCommon.GetObjectCount(data);
if (len != 0)
{
p.SystemTitle = new byte[len];
data.Get(p.SystemTitle);
}
break;
case Command.GloInitiateRequest:
case Command.GloInitiateResponse:
case Command.GloReadRequest:
case Command.GloReadResponse:
case Command.GloWriteRequest:
case Command.GloWriteResponse:
case Command.GloGetRequest:
case Command.GloGetResponse:
case Command.GloSetRequest:
case Command.GloSetResponse:
case Command.GloMethodRequest:
case Command.GloMethodResponse:
case Command.GloEventNotificationRequest:
break;
default:
throw new ArgumentOutOfRangeException("cryptedData");
}
len = Gurux.DLMS.Internal.GXCommon.GetObjectCount(data);
p.Security = (Gurux.DLMS.Enums.Security)data.GetUInt8();
p.InvocationCounter = data.GetUInt32();
System.Diagnostics.Debug.WriteLine("Decrypt settings: " + p.ToString());
System.Diagnostics.Debug.WriteLine("Encrypted: " + GXCommon.ToHex(data.Array(), true));
byte[] tag = new byte[12];
byte[] encryptedData;
int length;
if (p.Security == Gurux.DLMS.Enums.Security.Authentication)
{
length = data.Size - data.Position - 12;
encryptedData = new byte[length];
data.Get(encryptedData);
data.Get(tag);
// Check tag.
EncryptAesGcm(p, encryptedData);
if (!GXDLMSChipperingStream.TagsEquals(tag, p.CountTag))
{
throw new GXDLMSException("Decrypt failed. Invalid tag.");
}
return(encryptedData);
}
byte[] ciphertext = null;
if (p.Security == Gurux.DLMS.Enums.Security.Encryption)
{
length = data.Size - data.Position;
ciphertext = new byte[length];
data.Get(ciphertext);
}
else if (p.Security == Gurux.DLMS.Enums.Security.AuthenticationEncryption)
{
length = data.Size - data.Position - 12;
ciphertext = new byte[length];
data.Get(ciphertext);
data.Get(tag);
}
byte[] aad = GetAuthenticatedData(p.Security, p.AuthenticationKey, ciphertext);
byte[] iv = GetNonse(p.InvocationCounter, p.SystemTitle);
GXDLMSChipperingStream gcm = new GXDLMSChipperingStream(p.Security, true, p.BlockCipherKey, aad, iv, tag);
gcm.Write(ciphertext);
ciphertext = gcm.FlushFinalBlock();
if (p.Security == Gurux.DLMS.Enums.Security.AuthenticationEncryption)
{
// Check tag.
EncryptAesGcm(p, ciphertext);
if (!GXDLMSChipperingStream.TagsEquals(tag, p.CountTag))
{
// throw new GXDLMSException("Decrypt failed. Invalid tag.");
}
}
return(ciphertext);
}
/// <summary>
/// Decrypt data.
/// </summary>
/// <param name="p">Decryption parameters</param>
/// <returns>Decrypted data.</returns>
public static byte[] DecryptAesGcm(AesGcmParameter p, GXByteBuffer data)
{
if (data == null || data.Size < 2)
{
throw new ArgumentOutOfRangeException("cryptedData");
}
Command cmd = (Command)data.GetUInt8();
if (!((byte)cmd == 0x21 || (byte)cmd == 0x28 ||
cmd == Command.GloGetRequest ||
cmd == Command.GloGetResponse ||
cmd == Command.GloSetRequest ||
cmd == Command.GloSetResponse ||
cmd == Command.GloMethodRequest ||
cmd == Command.GloMethodResponse))
{
throw new ArgumentOutOfRangeException("cryptedData");
}
int len = Gurux.DLMS.Internal.GXCommon.GetObjectCount(data);
p.Security = (Security)data.GetUInt8();
p.FrameCounter = data.GetUInt32();
System.Diagnostics.Debug.WriteLine("Decrypt settings: " + p.ToString());
System.Diagnostics.Debug.WriteLine("Encrypted: " + GXCommon.ToHex(data.Array(), true));
byte[] tag = new byte[12];
byte[] encryptedData;
int length;
if (p.Security == Security.Authentication)
{
length = data.Size - data.Position - 12;
encryptedData = new byte[length];
data.Get(encryptedData);
data.Get(tag);
// Check tag.
EncryptAesGcm(p, encryptedData);
if (!GXDLMSChipperingStream.TagsEquals(tag, p.CountTag))
{
throw new GXDLMSException("Decrypt failed. Invalid tag.");
}
return(encryptedData);
}
byte[] ciphertext = null;
if (p.Security == Security.Encryption)
{
length = data.Size - data.Position;
ciphertext = new byte[length];
data.Get(ciphertext);
}
else if (p.Security == Security.AuthenticationEncryption)
{
length = data.Size - data.Position - 12;
ciphertext = new byte[length];
data.Get(ciphertext);
data.Get(tag);
}
byte[] aad = GetAuthenticatedData(p.Security, p.AuthenticationKey, data.Array());
GXDLMSChipperingStream gcm = new GXDLMSChipperingStream(p.Security, false, p.BlockCipherKey, aad, GetNonse(p.FrameCounter, p.SystemTitle), tag);
gcm.Write(ciphertext);
return(gcm.FlushFinalBlock());
}
/// <summary>
/// Decrypt data.
/// </summary>
/// <param name="p">Decryption parameters</param>
/// <returns>Decrypted data.</returns>
public static byte[] DecryptAesGcm(AesGcmParameter p, GXByteBuffer data)
{
if (data == null || data.Size < 2)
{
throw new ArgumentOutOfRangeException("cryptedData");
}
int len;
Command cmd = (Command)data.GetUInt8();
switch (cmd)
{
case Command.GloGeneralCiphering:
len = GXCommon.GetObjectCount(data);
p.SystemTitle = new byte[len];
data.Get(p.SystemTitle);
break;
case Command.GloInitiateRequest:
case Command.GloInitiateResponse:
case Command.GloReadRequest:
case Command.GloReadResponse:
case Command.GloWriteRequest:
case Command.GloWriteResponse:
case Command.GloGetRequest:
case Command.GloGetResponse:
case Command.GloSetRequest:
case Command.GloSetResponse:
case Command.GloMethodRequest:
case Command.GloMethodResponse:
case Command.GloEventNotificationRequest:
break;
default:
throw new ArgumentOutOfRangeException("cryptedData");
}
len = Gurux.DLMS.Internal.GXCommon.GetObjectCount(data);
p.Security = (Gurux.DLMS.Enums.Security)data.GetUInt8();
p.FrameCounter = data.GetUInt32();
System.Diagnostics.Debug.WriteLine("Decrypt settings: " + p.ToString());
System.Diagnostics.Debug.WriteLine("Encrypted: " + GXCommon.ToHex(data.Array(), true));
byte[] tag = new byte[12];
byte[] encryptedData;
int length;
if (p.Security == Gurux.DLMS.Enums.Security.Authentication)
{
length = data.Size - data.Position - 12;
encryptedData = new byte[length];
data.Get(encryptedData);
data.Get(tag);
// Check tag.
EncryptAesGcm(p, encryptedData);
if (!GXDLMSChipperingStream.TagsEquals(tag, p.CountTag))
{
throw new GXDLMSException("Decrypt failed. Invalid tag.");
}
return encryptedData;
}
byte[] ciphertext = null;
if (p.Security == Gurux.DLMS.Enums.Security.Encryption)
{
length = data.Size - data.Position;
ciphertext = new byte[length];
data.Get(ciphertext);
}
else if (p.Security == Gurux.DLMS.Enums.Security.AuthenticationEncryption)
{
length = data.Size - data.Position - 12;
ciphertext = new byte[length];
data.Get(ciphertext);
data.Get(tag);
}
byte[] aad = GetAuthenticatedData(p.Security, p.AuthenticationKey, data.Array());
byte[] iv = GetNonse(p.FrameCounter, p.SystemTitle);
GXDLMSChipperingStream gcm = new GXDLMSChipperingStream(p.Security, true, p.BlockCipherKey, aad, iv, tag);
gcm.Write(ciphertext);
return gcm.FlushFinalBlock();
}
byte[] IGXDLMSBase.Invoke(GXDLMSSettings settings, ValueEventArgs e)
{
//Check reply_to_HLS_authentication
if (e.Index == 1)
{
UInt32 ic = 0;
byte[] secret;
if (settings.Authentication == Authentication.HighGMAC)
{
secret = settings.SourceSystemTitle;
GXByteBuffer bb = new GXByteBuffer(e.Parameters as byte[]);
bb.GetUInt8();
ic = bb.GetUInt32();
}
else
{
secret = Secret;
}
byte[] serverChallenge = GXSecure.Secure(settings, settings.Cipher, ic, settings.StoCChallenge, secret);
byte[] clientChallenge = (byte[])e.Parameters;
if (serverChallenge != null && clientChallenge != null && GXCommon.Compare(serverChallenge, clientChallenge))
{
if (settings.Authentication == Authentication.HighGMAC)
{
secret = settings.Cipher.SystemTitle;
ic = settings.Cipher.InvocationCounter;
}
else
{
secret = Secret;
}
AssociationStatus = AssociationStatus.Associated;
return(GXSecure.Secure(settings, settings.Cipher, ic, settings.CtoSChallenge, secret));
}
else //If the password does not match.
{
AssociationStatus = AssociationStatus.NonAssociated;
return(null);
}
}
else if (e.Index == 2)
{
byte[] tmp = e.Parameters as byte[];
if (tmp == null || tmp.Length == 0)
{
e.Error = ErrorCode.ReadWriteDenied;
}
else
{
Secret = tmp;
}
}
else if (e.Index == 3)
{
//Add COSEM object.
GXDLMSObject obj = GetObject(settings, e.Parameters as object[]);
//Unknown objects are not add.
if (obj is IGXDLMSBase)
{
if (ObjectList.FindByLN(obj.ObjectType, obj.LogicalName) == null)
{
ObjectList.Add(obj);
}
if (settings.Objects.FindByLN(obj.ObjectType, obj.LogicalName) == null)
{
settings.Objects.Add(obj);
}
}
}
else if (e.Index == 4)
{
//Remove COSEM object.
GXDLMSObject obj = GetObject(settings, e.Parameters as object[]);
//Unknown objects are not removed.
if (obj is IGXDLMSBase)
{
GXDLMSObject t = ObjectList.FindByLN(obj.ObjectType, obj.LogicalName);
if (t != null)
{
ObjectList.Remove(t);
}
//Item is not removed from all objects. It might be that use wants remove object only from association view.
}
}
else if (e.Index == 5)
{
object[] tmp = e.Parameters as object[];
if (tmp == null || tmp.Length != 2)
{
e.Error = ErrorCode.ReadWriteDenied;
}
else
{
UserList.Add(new KeyValuePair <byte, string>(Convert.ToByte(tmp[0]), Convert.ToString(tmp[1])));
}
}
else if (e.Index == 6)
{
object[] tmp = e.Parameters as object[];
if (tmp == null || tmp.Length != 2)
{
e.Error = ErrorCode.ReadWriteDenied;
}
else
{
UserList.Remove(new KeyValuePair <byte, string>(Convert.ToByte(tmp[0]), Convert.ToString(tmp[1])));
}
}
else
{
e.Error = ErrorCode.ReadWriteDenied;
}
return(null);
}
/// <summary>
/// Decrypt data.
/// </summary>
/// <param name="p">Decryption parameters</param>
/// <returns>Decrypted data.</returns>
public static byte[] DecryptAesGcm(AesGcmParameter p, GXByteBuffer data)
{
if (data == null || data.Size < 2)
{
throw new ArgumentOutOfRangeException("cryptedData");
}
byte[] tmp;
int len;
Command cmd = (Command)data.GetUInt8();
switch (cmd)
{
case Command.GeneralGloCiphering:
case Command.GeneralDedCiphering:
len = GXCommon.GetObjectCount(data);
if (len != 0)
{
p.SystemTitle = new byte[len];
data.Get(p.SystemTitle);
if (p.Xml != null && p.Xml.Comments)
{
p.Xml.AppendComment(GXCommon.SystemTitleToString(Standard.DLMS, p.SystemTitle, true));
}
}
if (p.SystemTitle == null || p.SystemTitle.Length != 8)
{
if (p.Xml == null)
{
throw new ArgumentNullException("Invalid sender system title.");
}
else
{
p.Xml.AppendComment("Invalid sender system title.");
}
}
break;
case Command.GeneralCiphering:
case Command.GloInitiateRequest:
case Command.GloInitiateResponse:
case Command.GloReadRequest:
case Command.GloReadResponse:
case Command.GloWriteRequest:
case Command.GloWriteResponse:
case Command.GloGetRequest:
case Command.GloGetResponse:
case Command.GloSetRequest:
case Command.GloSetResponse:
case Command.GloMethodRequest:
case Command.GloMethodResponse:
case Command.GloEventNotification:
case Command.DedInitiateRequest:
case Command.DedInitiateResponse:
case Command.DedGetRequest:
case Command.DedGetResponse:
case Command.DedSetRequest:
case Command.DedSetResponse:
case Command.DedMethodRequest:
case Command.DedMethodResponse:
case Command.DedEventNotification:
case Command.DedReadRequest:
case Command.DedReadResponse:
case Command.DedWriteRequest:
case Command.DedWriteResponse:
case Command.GloConfirmedServiceError:
case Command.DedConfirmedServiceError:
break;
default:
throw new ArgumentOutOfRangeException("cryptedData");
}
int value = 0;
GXPrivateKey key = null;
GXPublicKey pub = null;
GXByteBuffer transactionId = null;
if (cmd == Command.GeneralCiphering)
{
transactionId = new GXByteBuffer();
len = GXCommon.GetObjectCount(data);
GXCommon.SetObjectCount(len, transactionId);
transactionId.Set(data, len);
p.TransactionId = transactionId.GetUInt64(1);
len = GXCommon.GetObjectCount(data);
if (len != 0)
{
tmp = new byte[len];
data.Get(tmp);
p.SystemTitle = tmp;
}
if (p.SystemTitle == null || p.SystemTitle.Length != 8)
{
if (p.Xml == null)
{
throw new ArgumentNullException("Invalid sender system title.");
}
else
{
p.Xml.AppendComment("Invalid sender system title.");
}
}
len = GXCommon.GetObjectCount(data);
tmp = new byte[len];
data.Get(tmp);
p.RecipientSystemTitle = tmp;
// Get date time.
len = GXCommon.GetObjectCount(data);
if (len != 0)
{
tmp = new byte[len];
data.Get(tmp);
p.DateTime = tmp;
}
// other-information
len = data.GetUInt8();
if (len != 0)
{
tmp = new byte[len];
data.Get(tmp);
p.OtherInformation = tmp;
}
// KeyInfo OPTIONAL
len = data.GetUInt8();
// AgreedKey CHOICE tag.
data.GetUInt8();
// key-parameters
len = data.GetUInt8();
value = data.GetUInt8();
p.KeyParameters = value;
if (value == (int)KeyAgreementScheme.OnePassDiffieHellman)
{
// key-ciphered-data
len = GXCommon.GetObjectCount(data);
GXByteBuffer bb = new GXByteBuffer();
bb.Set(data, len);
if (p.Xml != null)
{
p.KeyCipheredData = bb.Array();
//Find key agreement key using subject.
string subject = GXAsn1Converter.SystemTitleToSubject(p.SystemTitle);
foreach (KeyValuePair <GXPkcs8, GXx509Certificate> it in p.Settings.Keys)
{
if (it.Key != null && it.Value.KeyUsage == ASN.Enums.KeyUsage.KeyAgreement && it.Value.Subject.Contains(subject))
{
key = it.Key.PrivateKey;
//Get recipient Ephemeral public key.
subject = GXAsn1Converter.SystemTitleToSubject(p.RecipientSystemTitle);
foreach (KeyValuePair <GXPkcs8, GXx509Certificate> it2 in p.Settings.Keys)
{
if (it2.Value != null && it2.Value.KeyUsage == ASN.Enums.KeyUsage.KeyAgreement && it2.Value.Subject.Contains(subject))
{
pub = it2.Value.PublicKey;
break;
}
}
break;
}
}
if (key == null)
{
//Find key agreement key using subject.
subject = GXAsn1Converter.SystemTitleToSubject(p.RecipientSystemTitle);
foreach (KeyValuePair <GXPkcs8, GXx509Certificate> it in p.Settings.Keys)
{
if (it.Key != null && it.Value.KeyUsage == ASN.Enums.KeyUsage.KeyAgreement && it.Value.Subject.Contains(subject))
{
key = it.Key.PrivateKey;
break;
}
}
}
}
else
{
key = p.Settings.Cipher.KeyAgreementKeyPair.Key;
}
if (key != null && pub == null)
{
//Get Ephemeral public key.
int keySize = len / 2;
pub = GXPublicKey.FromRawBytes(bb.SubArray(0, keySize));
}
}
else if (value == (int)KeyAgreementScheme.StaticUnifiedModel)
{
len = GXCommon.GetObjectCount(data);
if (len != 0)
{
throw new ArgumentException("Invalid key parameters");
}
if (p.Xml != null)
{
//Find key agreement key using subject.
string subject = GXAsn1Converter.SystemTitleToSubject(p.RecipientSystemTitle);
foreach (KeyValuePair <GXPkcs8, GXx509Certificate> it in p.Settings.Keys)
{
if (it.Value.KeyUsage == ASN.Enums.KeyUsage.KeyAgreement && it.Value.Subject.Contains(subject))
{
key = it.Key.PrivateKey;
break;
}
}
if (key != null)
{
//Find key agreement key using subject.
subject = GXAsn1Converter.SystemTitleToSubject(p.Settings.SourceSystemTitle);
foreach (KeyValuePair <GXPkcs8, GXx509Certificate> it in p.Settings.Keys)
{
if (it.Value.KeyUsage == ASN.Enums.KeyUsage.KeyAgreement && it.Value.Subject.Contains(subject))
{
pub = it.Value.PublicKey;
break;
}
}
}
}
else
{
key = p.Settings.Cipher.KeyAgreementKeyPair.Key;
pub = p.Settings.Cipher.KeyAgreementKeyPair.Value;
}
}
else
{
throw new ArgumentException("key-parameters");
}
}
len = GXCommon.GetObjectCount(data);
if (len > data.Available)
{
throw new Exception("Not enought data.");
}
p.CipheredContent = data.Remaining();
byte sc = data.GetUInt8();
p.SecuritySuite = (SecuritySuite)(sc & 0x3);
p.Security = (Security)(sc & 0x30);
if ((sc & 0x80) != 0)
{
System.Diagnostics.Debug.WriteLine("Compression is used.");
}
if ((sc & 0x40) != 0)
{
System.Diagnostics.Debug.WriteLine("Error: Key_Set is used.");
}
if ((sc & 0x20) != 0)
{
System.Diagnostics.Debug.WriteLine("Encryption is applied.");
}
if (key != null)
{
if (value == (int)KeyAgreementScheme.OnePassDiffieHellman)
{
GXEcdsa c = new GXEcdsa(key);
//Get Ephemeral signing key and verify it.
byte[] z = c.GenerateSecret(pub);
System.Diagnostics.Debug.WriteLine("Originator ephemeral public key: " + pub.ToHex());
System.Diagnostics.Debug.WriteLine("Recipient private agreement key: " + key.ToHex());
System.Diagnostics.Debug.WriteLine("Shared secret:" + GXCommon.ToHex(z, true));
GXByteBuffer kdf = new GXByteBuffer();
kdf.Set(GXSecure.GenerateKDF(p.SecuritySuite, z,
p.SecuritySuite == SecuritySuite.Ecdsa256 ? AlgorithmId.AesGcm128 : AlgorithmId.AesGcm256,
p.SystemTitle,
p.RecipientSystemTitle,
null, null));
System.Diagnostics.Debug.WriteLine("KDF:" + kdf.ToString());
p.BlockCipherKey = kdf.SubArray(0, 16);
}
else if (value == (int)KeyAgreementScheme.StaticUnifiedModel)
{
GXEcdsa c = new GXEcdsa(key);
byte[] z = c.GenerateSecret(pub);
System.Diagnostics.Debug.WriteLine("Shared secret:" + GXCommon.ToHex(z, true));
GXByteBuffer kdf = new GXByteBuffer();
kdf.Set(GXSecure.GenerateKDF(p.SecuritySuite, z,
p.SecuritySuite == SecuritySuite.Ecdsa256 ? AlgorithmId.AesGcm128 : AlgorithmId.AesGcm256,
p.SystemTitle,
transactionId.Array(),
p.RecipientSystemTitle,
null));
System.Diagnostics.Debug.WriteLine("KDF:" + kdf.ToString());
p.BlockCipherKey = kdf.SubArray(0, 16);
}
else
{
throw new ArgumentOutOfRangeException("Invalid Key-id value.");
}
}
UInt32 invocationCounter = data.GetUInt32();
p.InvocationCounter = invocationCounter;
System.Diagnostics.Debug.WriteLine("Decrypt settings: " + p.ToString());
System.Diagnostics.Debug.WriteLine("Encrypted: " + GXCommon.ToHex(data.Data,
false, data.Position, data.Size - data.Position));
byte[] tag = new byte[12];
byte[] encryptedData;
int length;
if (p.Security == Security.Authentication)
{
length = data.Size - data.Position - 12;
encryptedData = new byte[length];
data.Get(encryptedData);
data.Get(tag);
// Check tag.
EncryptAesGcm(p, encryptedData);
if (!GXDLMSChipperingStream.TagsEquals(tag, p.CountTag))
{
if (p.Xml == null)
{
throw new GXDLMSException("Decrypt failed. Invalid tag.");
}
else
{
p.Xml.AppendComment("Decrypt failed. Invalid tag.");
}
}
return(encryptedData);
}
byte[] ciphertext = null;
if (p.Security == Security.Encryption)
{
length = data.Size - data.Position;
ciphertext = new byte[length];
data.Get(ciphertext);
}
else if (p.Security == Security.AuthenticationEncryption)
{
length = data.Size - data.Position - 12;
ciphertext = new byte[length];
data.Get(ciphertext);
data.Get(tag);
}
byte[] aad = GetAuthenticatedData(p, ciphertext),
iv = GetNonse(invocationCounter, p.SystemTitle);
GXDLMSChipperingStream gcm = new GXDLMSChipperingStream(p.Security, true,
p.BlockCipherKey, aad, iv, tag);
gcm.Write(ciphertext);
byte[] decrypted = gcm.FlushFinalBlock();
System.Diagnostics.Debug.WriteLine("Decrypted: " + GXCommon.ToHex(decrypted, true));
if (p.Security != Security.Encryption)
{
if (!GXCommon.Compare(gcm.GetTag(), tag))
{
if (p.Xml == null)
{
throw new Exception("Decrypt failed. Invalid authentication tag.");
}
p.Xml.AppendComment("Decrypt failed. Invalid authentication tag.");
}
}
return(decrypted);
}
///<summary>
///Get UInt32 value from DLMS data.
///</summary>
///<param name="buff">
///Received DLMS data.
///</param>
///<param name="info">
///Data info.
///</param>
///<returns>
///Parsed UInt32 value.
/// </returns>
private static object GetUInt32(GXByteBuffer buff, GXDataInfo info)
{
// If there is not enough data available.
if (buff.Size - buff.Position < 4)
{
info.Complete = false;
return null;
}
UInt32 value = buff.GetUInt32();
if (info.xml != null)
{
info.xml.AppendLine(info.xml.GetDataType(info.Type), "Value", value);
}
return value;
}
/// <summary>
/// Get object count. If first byte is 0x80 or higger it will tell bytes count.
/// </summary>
/// <param name="data">Received data.</param>
/// <returns>Object count.</returns>
public static int GetObjectCount(GXByteBuffer data)
{
int cnt = data.GetUInt8();
if (cnt > 0x80)
{
if (cnt == 0x81)
{
return data.GetUInt8();
}
else if (cnt == 0x82)
{
return data.GetUInt16();
}
else if (cnt == 0x84)
{
return (int)data.GetUInt32();
}
else
{
throw new System.ArgumentException("Invalid count.");
}
}
return cnt;
}
/// <summary>
/// Get HDLC address from byte array.
/// </summary>
/// <param name="GXByteBuffer">Byte array.</param>
/// <returns>HDLC address.</returns>
public static int GetHDLCAddress(GXByteBuffer buff)
{
int size = 0;
for (int pos = buff.Position; pos != buff.Size; ++pos)
{
++size;
if ((buff.GetUInt8(pos) & 0x1) == 1)
{
break;
}
}
if (size == 1)
{
return (byte)((buff.GetUInt8() & 0xFE) >> 1);
}
else if (size == 2)
{
size = buff.GetUInt16();
size = ((size & 0xFE) >> 1) | ((size & 0xFE00) >> 2);
return size;
}
else if (size == 4)
{
UInt32 tmp = buff.GetUInt32();
tmp = ((tmp & 0xFE) >> 1) | ((tmp & 0xFE00) >> 2)
| ((tmp & 0xFE0000) >> 3) | ((tmp & 0xFE000000) >> 4);
return (int)tmp;
}
throw new ArgumentException("Wrong size.");
}
void IGXDLMSBase.SetValue(GXDLMSSettings settings, ValueEventArgs e)
{
if (e.Index == 1)
{
LogicalName = GXCommon.ToLogicalName(e.Value);
}
else if (e.Index == 2)
{
ObjectList.Clear();
if (e.Value != null)
{
foreach (Object[] item in (Object[])e.Value)
{
GXDLMSObject obj = GetObject(settings, item);
//Unknown objects are not shown.
if (obj is IGXDLMSBase)
{
ObjectList.Add(obj);
}
}
}
}
else if (e.Index == 3)
{
if (e.Value != null)
{
ClientSAP = Convert.ToByte(((Object[])e.Value)[0]);
ServerSAP = Convert.ToUInt16(((Object[])e.Value)[1]);
}
}
else if (e.Index == 4)
{
//Value of the object identifier encoded in BER
if (e.Value is byte[])
{
GXByteBuffer arr = new GXByteBuffer(e.Value as byte[]);
if (arr.GetUInt8(0) == 0x60)
{
ApplicationContextName.JointIsoCtt = arr.GetUInt8();
ApplicationContextName.Country = arr.GetUInt8();
ApplicationContextName.CountryName = arr.GetUInt8();
ApplicationContextName.IdentifiedOrganization = arr.GetUInt8();
ApplicationContextName.DlmsUA = arr.GetUInt8();
ApplicationContextName.ApplicationContext = arr.GetUInt8();
ApplicationContextName.ContextId = (ApplicationContextName)arr.GetUInt8();
}
else
{
//Get Tag and Len.
if (arr.GetUInt8() != (int)BerType.Integer && arr.GetUInt8() != 7)
{
throw new ArgumentOutOfRangeException();
}
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
ApplicationContextName.JointIsoCtt = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
ApplicationContextName.Country = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x12)
{
throw new ArgumentOutOfRangeException();
}
ApplicationContextName.CountryName = arr.GetUInt16();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
ApplicationContextName.IdentifiedOrganization = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
ApplicationContextName.DlmsUA = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
ApplicationContextName.ApplicationContext = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
ApplicationContextName.ContextId = (ApplicationContextName)arr.GetUInt8();
}
}
else if (e.Value != null)
{
Object[] arr = (Object[])e.Value;
ApplicationContextName.JointIsoCtt = Convert.ToByte(arr[0]);
ApplicationContextName.Country = Convert.ToByte(arr[1]);
ApplicationContextName.CountryName = Convert.ToUInt16(arr[2]);
ApplicationContextName.IdentifiedOrganization = Convert.ToByte(arr[3]);
ApplicationContextName.DlmsUA = Convert.ToByte(arr[4]);
ApplicationContextName.ApplicationContext = Convert.ToByte(arr[5]);
ApplicationContextName.ContextId = (ApplicationContextName)Convert.ToByte(arr[6]);
}
}
else if (e.Index == 5)
{
if (e.Value != null)
{
Object[] arr = (Object[])e.Value;
if (arr[0] is string || arr[0] is byte[])
{
GXByteBuffer bb = new GXByteBuffer();
GXCommon.SetBitString(bb, arr[0], true);
bb.SetUInt8(0, 0);
XDLMSContextInfo.Conformance = (Conformance)bb.GetUInt32();
}
else
{
XDLMSContextInfo.Conformance = (Conformance)Convert.ToUInt16(arr[0]);
}
XDLMSContextInfo.MaxReceivePduSize = Convert.ToUInt16(arr[1]);
XDLMSContextInfo.MaxSendPduSize = Convert.ToUInt16(arr[2]);
XDLMSContextInfo.DlmsVersionNumber = Convert.ToByte(arr[3]);
XDLMSContextInfo.QualityOfService = Convert.ToSByte(arr[4]);
XDLMSContextInfo.CypheringInfo = (byte[])arr[5];
}
}
else if (e.Index == 6)
{
//Value of the object identifier encoded in BER
if (e.Value is byte[])
{
GXByteBuffer arr = new GXByteBuffer(e.Value as byte[]);
if (arr.GetUInt8(0) == 0x60)
{
AuthenticationMechanismName.JointIsoCtt = arr.GetUInt8();
AuthenticationMechanismName.Country = arr.GetUInt8();
AuthenticationMechanismName.CountryName = arr.GetUInt8();
AuthenticationMechanismName.IdentifiedOrganization = arr.GetUInt8();
AuthenticationMechanismName.DlmsUA = arr.GetUInt8();
AuthenticationMechanismName.AuthenticationMechanismName = arr.GetUInt8();
AuthenticationMechanismName.MechanismId = (Authentication)arr.GetUInt8();
}
else
{
//Get Tag and Len.
if (arr.GetUInt8() != (int)BerType.Integer && arr.GetUInt8() != 7)
{
throw new ArgumentOutOfRangeException();
}
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
AuthenticationMechanismName.JointIsoCtt = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
AuthenticationMechanismName.Country = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x12)
{
throw new ArgumentOutOfRangeException();
}
AuthenticationMechanismName.CountryName = arr.GetUInt16();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
AuthenticationMechanismName.IdentifiedOrganization = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
AuthenticationMechanismName.DlmsUA = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
AuthenticationMechanismName.AuthenticationMechanismName = arr.GetUInt8();
//Get tag
if (arr.GetUInt8() != 0x11)
{
throw new ArgumentOutOfRangeException();
}
AuthenticationMechanismName.MechanismId = (Authentication)arr.GetUInt8();
}
}
else if (e.Value != null)
{
Object[] arr = (Object[])e.Value;
AuthenticationMechanismName.JointIsoCtt = Convert.ToByte(arr[0]);
AuthenticationMechanismName.Country = Convert.ToByte(arr[1]);
AuthenticationMechanismName.CountryName = Convert.ToUInt16(arr[2]);
AuthenticationMechanismName.IdentifiedOrganization = Convert.ToByte(arr[3]);
AuthenticationMechanismName.DlmsUA = Convert.ToByte(arr[4]);
AuthenticationMechanismName.AuthenticationMechanismName = Convert.ToByte(arr[5]);
AuthenticationMechanismName.MechanismId = (Authentication)Convert.ToByte(arr[6]);
}
}
else if (e.Index == 7)
{
Secret = (byte[])e.Value;
}
else if (e.Index == 8)
{
if (e.Value == null)
{
AssociationStatus = AssociationStatus.NonAssociated;
}
else
{
AssociationStatus = (AssociationStatus)Convert.ToInt32(e.Value);
}
}
else if (e.Index == 9)
{
SecuritySetupReference = GXCommon.ToLogicalName(e.Value);
}
else if (e.Index == 10)
{
UserList.Clear();
if (e.Value != null)
{
foreach (Object[] item in (Object[])e.Value)
{
UserList.Add(new KeyValuePair <byte, string>(Convert.ToByte(item[0]), Convert.ToString(item[1])));
}
}
}
else if (e.Index == 11)
{
if (e.Value != null)
{
Object[] tmp = (Object[])e.Value;
if (tmp.Length == 1)
{
CurrentUser = new KeyValuePair <byte, string>(Convert.ToByte(tmp[0]), null);
}
else
{
CurrentUser = new KeyValuePair <byte, string>(Convert.ToByte(tmp[0]), Convert.ToString(tmp[1]));
}
}
else
{
CurrentUser = new KeyValuePair <byte, string>(0, null);
}
}
else
{
e.Error = ErrorCode.ReadWriteDenied;
}
}
byte[] IGXDLMSBase.Invoke(GXDLMSSettings settings, ValueEventArgs e)
{
//Check reply_to_HLS_authentication
if (e.Index == 1)
{
UInt32 ic = 0;
byte[] secret;
if (settings.Authentication == Authentication.HighGMAC)
{
secret = settings.SourceSystemTitle;
GXByteBuffer bb = new GXByteBuffer(e.Parameters as byte[]);
bb.GetUInt8();
ic = bb.GetUInt32();
}
else
{
secret = Secret;
}
byte[] serverChallenge = GXSecure.Secure(settings, settings.Cipher, ic, settings.StoCChallenge, secret);
byte[] clientChallenge = (byte[])e.Parameters;
if (serverChallenge != null && clientChallenge != null && GXCommon.Compare(serverChallenge, clientChallenge))
{
if (settings.Authentication == Authentication.HighGMAC)
{
secret = settings.Cipher.SystemTitle;
ic = settings.Cipher.InvocationCounter;
}
else
{
secret = Secret;
}
settings.Connected = true;
return(GXSecure.Secure(settings, settings.Cipher, ic, settings.CtoSChallenge, secret));
}
else //If the password does not match.
{
settings.Connected = false;
return(null);
}
}
else if (e.Index == 2)
{
byte[] tmp = e.Parameters as byte[];
if (tmp == null || tmp.Length == 0)
{
e.Error = ErrorCode.ReadWriteDenied;
}
else
{
Secret = tmp;
}
}
else if (e.Index == 5)
{
object[] tmp = e.Parameters as object[];
if (tmp == null || tmp.Length != 2)
{
e.Error = ErrorCode.ReadWriteDenied;
}
else
{
UserList.Add(new KeyValuePair <byte, string>(Convert.ToByte(tmp[0]), Convert.ToString(tmp[1])));
}
}
else if (e.Index == 6)
{
object[] tmp = e.Parameters as object[];
if (tmp == null || tmp.Length != 2)
{
e.Error = ErrorCode.ReadWriteDenied;
}
else
{
UserList.Remove(new KeyValuePair <byte, string>(Convert.ToByte(tmp[0]), Convert.ToString(tmp[1])));
}
}
else
{
e.Error = ErrorCode.ReadWriteDenied;
}
return(null);
}
