/// <summary>
/// Generate user information.
/// </summary>
/// <param name="settings">DLMS settings.</param>
/// <param name="cipher"></param>
/// <param name="data">Generated user information.</param>
static internal void GenerateUserInformation(GXDLMSSettings settings, GXICipher cipher, GXByteBuffer data)
{
data.SetUInt8((byte)BerType.Context | (byte)BerType.Constructed | (byte)PduType.UserInformation);
if (cipher == null || !cipher.IsCiphered())
{
//Length for AARQ user field
data.SetUInt8(0x10);
//Coding the choice for user-information (Octet STRING, universal)
data.SetUInt8(BerType.OctetString);
//Length
data.SetUInt8(0x0E);
GetInitiateRequest(settings, cipher, data);
}
else
{
GXByteBuffer tmp = new GXByteBuffer();
GetInitiateRequest(settings, cipher, tmp);
byte[] crypted = cipher.Encrypt(0x21, cipher.SystemTitle, tmp.Array());
//Length for AARQ user field
data.SetUInt8((byte)(2 + crypted.Length));
//Coding the choice for user-information (Octet STRING, universal)
data.SetUInt8(BerType.OctetString);
data.SetUInt8((byte)crypted.Length);
data.Set(crypted);
}
}
/// <summary>
/// Code application context name.
/// </summary>
/// <param name="settings">DLMS settings.</param>
/// <param name="data">Byte buffer where data is saved.</param>
/// <param name="cipher">Is ciphering settings.</param>
private static void GenerateApplicationContextName(GXDLMSSettings settings, GXByteBuffer data, GXICipher cipher)
{
//Application context name tag
data.SetUInt8(((byte)BerType.Context | (byte)BerType.Constructed | (byte)PduType.ApplicationContextName));
//Len
data.SetUInt8(0x09);
data.SetUInt8(BerType.ObjectIdentifier);
//Len
data.SetUInt8(0x07);
bool ciphered = cipher != null && cipher.IsCiphered();
if (settings.UseLogicalNameReferencing)
{
if (ciphered)
{
data.Set(GXCommon.LogicalNameObjectIdWithCiphering);
}
else
{
data.Set(GXCommon.LogicalNameObjectID);
}
}
else
{
if (ciphered)
{
data.Set(GXCommon.ShortNameObjectIdWithCiphering);
}
else
{
data.Set(GXCommon.ShortNameObjectID);
}
}
//Add system title if cipher or GMAC authentication is used..
if (!settings.IsServer && (ciphered || settings.Authentication == Authentication.HighGMAC))
{
if (cipher.SystemTitle == null || cipher.SystemTitle.Length == 0)
{
throw new ArgumentNullException("SystemTitle");
}
//Add calling-AP-title
data.SetUInt8(((byte)BerType.Context | (byte)BerType.Constructed | 6));
//LEN
data.SetUInt8((byte)(2 + cipher.SystemTitle.Length));
data.SetUInt8((byte)BerType.OctetString);
//LEN
data.SetUInt8((byte)cipher.SystemTitle.Length);
data.Set(cipher.SystemTitle);
}
}
private static byte[] GetUserInformation(GXDLMSSettings settings, GXICipher cipher)
{
GXByteBuffer data = new GXByteBuffer();
data.SetUInt8(GXCommon.InitialResponce); // Tag for xDLMS-Initiate response
// NegotiatedQualityOfService (not used)
data.SetUInt8(0x1);
data.SetUInt8(0x00);
// DLMS Version Number
data.SetUInt8(06);
data.SetUInt8(0x5F);
data.SetUInt8(0x1F);
data.SetUInt8(0x04); // length of the conformance block
data.SetUInt8(0x00); // encoding the number of unused bits in the bit string
if (settings.UseLogicalNameReferencing)
{
data.Set(settings.LnSettings.ConformanceBlock);
}
else
{
data.Set(settings.SnSettings.ConformanceBlock);
}
data.SetUInt16(settings.MaxReceivePDUSize);
//VAA Name VAA name (0x0007 for LN referencing and 0xFA00 for SN)
if (settings.UseLogicalNameReferencing)
{
data.SetUInt16(0x0007);
}
else
{
data.SetUInt16(0xFA00);
}
if (cipher != null && cipher.IsCiphered())
{
return(cipher.Encrypt(0x28, cipher.SystemTitle, data.Array()));
}
return(data.Array());
}
///<summary>
///Server generates AARE message.
///</summary>
internal static void GenerateAARE(GXDLMSSettings settings, GXByteBuffer data,
AssociationResult result, SourceDiagnostic diagnostic, GXICipher cipher)
{
int offset = data.Position;
// Set AARE tag and length
data.SetUInt8(((byte)BerType.Application | (byte)BerType.Constructed | (byte)PduType.ApplicationContextName)); //0x61
// Length is updated later.
data.SetUInt8(0);
GenerateApplicationContextName(settings, data, cipher);
//Result
data.SetUInt8((byte)BerType.Context | (byte)BerType.Constructed | (byte)BerType.Integer); //0xA2
data.SetUInt8(3); //len
data.SetUInt8(BerType.Integer); //Tag
//Choice for result (INTEGER, universal)
data.SetUInt8(1); //Len
data.SetUInt8((byte)result); //ResultValue
//SourceDiagnostic
data.SetUInt8(0xA3);
data.SetUInt8(5); //len
data.SetUInt8(0xA1); //Tag
data.SetUInt8(3); //len
data.SetUInt8(2); //Tag
//Choice for result (INTEGER, universal)
data.SetUInt8(1); //Len
data.SetUInt8((byte)diagnostic); //diagnostic
//SystemTitle
if (cipher != null && (cipher.IsCiphered() || settings.Authentication == Authentication.HighGMAC))
{
data.SetUInt8((byte)BerType.Context | (byte)BerType.Constructed | (byte)PduType.CalledApInvocationId);
data.SetUInt8((byte)(2 + cipher.SystemTitle.Length));
data.SetUInt8((byte)BerType.OctetString);
data.SetUInt8((byte)cipher.SystemTitle.Length);
data.Set(cipher.SystemTitle);
}
if (result != AssociationResult.PermanentRejected && diagnostic == SourceDiagnostic.AuthenticationRequired)
{
//Add server ACSE-requirenents field component.
data.SetUInt8(0x88);
data.SetUInt8(0x02); //Len.
data.SetUInt16(0x0780);
//Add tag.
data.SetUInt8(0x89);
data.SetUInt8(0x07);//Len
data.SetUInt8(0x60);
data.SetUInt8(0x85);
data.SetUInt8(0x74);
data.SetUInt8(0x05);
data.SetUInt8(0x08);
data.SetUInt8(0x02);
data.SetUInt8((byte)settings.Authentication);
//Add tag.
data.SetUInt8(0xAA);
data.SetUInt8((byte)(2 + settings.StoCChallenge.Length));//Len
data.SetUInt8((byte)BerType.Context);
data.SetUInt8((byte)settings.StoCChallenge.Length);
data.Set(settings.StoCChallenge);
}
//Add User Information
//Tag 0xBE
data.SetUInt8((byte)BerType.Context | (byte)BerType.Constructed | (byte)PduType.UserInformation);
byte[] tmp = GetUserInformation(settings, cipher);
data.SetUInt8((byte)(2 + tmp.Length));
//Coding the choice for user-information (Octet STRING, universal)
data.SetUInt8(BerType.OctetString);
//Length
data.SetUInt8((byte)tmp.Length);
data.Set(tmp);
data.SetUInt8((UInt16)(offset + 1), (byte)(data.Size - offset - 2));
}
private static byte[] GetUserInformation(GXDLMSSettings settings, GXICipher cipher)
{
GXByteBuffer data = new GXByteBuffer();
data.SetUInt8(Command.InitiateResponse); // Tag for xDLMS-Initiate response
// NegotiatedQualityOfService (not used)
data.SetUInt8(0x1);
data.SetUInt8(0x00);
// DLMS Version Number
data.SetUInt8(06);
data.SetUInt8(0x5F);
data.SetUInt8(0x1F);
data.SetUInt8(0x04);// length of the conformance block
data.SetUInt8(0x00);// encoding the number of unused bits in the bit string
if (settings.UseLogicalNameReferencing)
{
data.Set(settings.LnSettings.ConformanceBlock);
}
else
{
data.Set(settings.SnSettings.ConformanceBlock);
}
data.SetUInt16(settings.MaxPduSize);
//VAA Name VAA name (0x0007 for LN referencing and 0xFA00 for SN)
if (settings.UseLogicalNameReferencing)
{
data.SetUInt16(0x0007);
}
else
{
data.SetUInt16(0xFA00);
}
if (cipher != null && cipher.IsCiphered())
{
return cipher.Encrypt((byte)Command.GloInitiateResponse, cipher.SystemTitle, data.Array());
}
return data.Array();
}
/// <summary>
/// Generate user information.
/// </summary>
/// <param name="settings">DLMS settings.</param>
/// <param name="cipher"></param>
/// <param name="data">Generated user information.</param>
static internal void GenerateUserInformation(GXDLMSSettings settings, GXICipher cipher, GXByteBuffer encryptedData, GXByteBuffer data)
{
data.SetUInt8((byte)BerType.Context | (byte)BerType.Constructed | (byte)PduType.UserInformation);
if (cipher == null || !cipher.IsCiphered())
{
//Length for AARQ user field
data.SetUInt8(0x10);
//Coding the choice for user-information (Octet STRING, universal)
data.SetUInt8(BerType.OctetString);
//Length
data.SetUInt8(0x0E);
GetInitiateRequest(settings, cipher, data);
}
else
{
if (encryptedData != null && encryptedData.Size != 0)
{
//Length for AARQ user field
data.SetUInt8((byte)(4 + encryptedData.Size));
//Tag
data.SetUInt8(BerType.OctetString);
data.SetUInt8((byte)(2 + encryptedData.Size));
//Coding the choice for user-information (Octet STRING, universal)
data.SetUInt8((byte)Command.GloInitiateRequest);
data.SetUInt8((byte)encryptedData.Size);
data.Set(encryptedData);
}
else
{
GXByteBuffer tmp = new GXByteBuffer();
GetInitiateRequest(settings, cipher, tmp);
byte[] crypted = cipher.Encrypt((byte)Command.GloInitiateRequest, cipher.SystemTitle, tmp.Array());
//Length for AARQ user field
data.SetUInt8((byte)(2 + crypted.Length));
//Coding the choice for user-information (Octet STRING, universal)
data.SetUInt8(BerType.OctetString);
data.SetUInt8((byte)crypted.Length);
data.Set(crypted);
}
}
}
/// <summary>
/// Code application context name.
/// </summary>
/// <param name="settings">DLMS settings.</param>
/// <param name="data">Byte buffer where data is saved.</param>
/// <param name="cipher">Is ciphering settings.</param>
private static void GenerateApplicationContextName(GXDLMSSettings settings, GXByteBuffer data, GXICipher cipher)
{
//Application context name tag
data.SetUInt8(((byte)BerType.Context | (byte)BerType.Constructed | (byte)PduType.ApplicationContextName));
//Len
data.SetUInt8(0x09);
data.SetUInt8(BerType.ObjectIdentifier);
//Len
data.SetUInt8(0x07);
bool ciphered = cipher != null && cipher.IsCiphered();
if (settings.UseLogicalNameReferencing)
{
if (ciphered)
{
data.Set(GXCommon.LogicalNameObjectIdWithCiphering);
}
else
{
data.Set(GXCommon.LogicalNameObjectID);
}
}
else
{
if (ciphered)
{
data.Set(GXCommon.ShortNameObjectIdWithCiphering);
}
else
{
data.Set(GXCommon.ShortNameObjectID);
}
}
//Add system title if cipher or GMAC authentication is used..
if (!settings.IsServer && (ciphered || settings.Authentication == Authentication.HighGMAC))
{
if (cipher.SystemTitle == null || cipher.SystemTitle.Length == 0)
{
throw new ArgumentNullException("SystemTitle");
}
//Add calling-AP-title
data.SetUInt8(((byte)BerType.Context | (byte)BerType.Constructed | 6));
//LEN
data.SetUInt8((byte)(2 + cipher.SystemTitle.Length));
data.SetUInt8((byte)BerType.OctetString);
//LEN
data.SetUInt8((byte)cipher.SystemTitle.Length);
data.Set(cipher.SystemTitle);
}
}
///<summary>
///Server generates AARE message.
///</summary>
internal static void GenerateAARE(GXDLMSSettings settings, GXByteBuffer data,
AssociationResult result, SourceDiagnostic diagnostic, GXICipher cipher,
GXByteBuffer encryptedData)
{
int offset = data.Size;
// Set AARE tag and length
data.SetUInt8(((byte)BerType.Application | (byte)BerType.Constructed | (byte)PduType.ApplicationContextName)); //0x61
// Length is updated later.
data.SetUInt8(0);
GenerateApplicationContextName(settings, data, cipher);
//Result
data.SetUInt8((byte)BerType.Context | (byte)BerType.Constructed | (byte)BerType.Integer);//0xA2
data.SetUInt8(3); //len
data.SetUInt8(BerType.Integer); //Tag
//Choice for result (INTEGER, universal)
data.SetUInt8(1); //Len
data.SetUInt8((byte)result); //ResultValue
//SourceDiagnostic
data.SetUInt8(0xA3);
data.SetUInt8(5); //len
data.SetUInt8(0xA1); //Tag
data.SetUInt8(3); //len
data.SetUInt8(2); //Tag
//Choice for result (INTEGER, universal)
data.SetUInt8(1); //Len
data.SetUInt8((byte)diagnostic); //diagnostic
//SystemTitle
if (cipher != null && (cipher.IsCiphered() || settings.Authentication == Authentication.HighGMAC))
{
data.SetUInt8((byte)BerType.Context | (byte)BerType.Constructed | (byte)PduType.CalledApInvocationId);
data.SetUInt8((byte)(2 + cipher.SystemTitle.Length));
data.SetUInt8((byte)BerType.OctetString);
data.SetUInt8((byte)cipher.SystemTitle.Length);
data.Set(cipher.SystemTitle);
}
if (result != AssociationResult.PermanentRejected && diagnostic == SourceDiagnostic.AuthenticationRequired)
{
//Add server ACSE-requirenents field component.
data.SetUInt8(0x88);
data.SetUInt8(0x02); //Len.
data.SetUInt16(0x0780);
//Add tag.
data.SetUInt8(0x89);
data.SetUInt8(0x07);//Len
data.SetUInt8(0x60);
data.SetUInt8(0x85);
data.SetUInt8(0x74);
data.SetUInt8(0x05);
data.SetUInt8(0x08);
data.SetUInt8(0x02);
data.SetUInt8((byte)settings.Authentication);
//Add tag.
data.SetUInt8(0xAA);
data.SetUInt8((byte)(2 + settings.StoCChallenge.Length));//Len
data.SetUInt8((byte)BerType.Context);
data.SetUInt8((byte)settings.StoCChallenge.Length);
data.Set(settings.StoCChallenge);
}
byte[] tmp;
//Add User Information
//Tag 0xBE
data.SetUInt8((byte)BerType.Context | (byte)BerType.Constructed | (byte)PduType.UserInformation);
if (encryptedData != null && encryptedData.Size != 0)
{
GXByteBuffer tmp2 = new GXByteBuffer((UInt16)(2 + encryptedData.Size));
tmp2.SetUInt8((byte)Command.GloInitiateResponse);
GXCommon.SetObjectCount(encryptedData.Size, tmp2);
tmp2.Set(encryptedData);
tmp = tmp2.Array();
}
else
{
tmp = GetUserInformation(settings, cipher);
}
data.SetUInt8((byte)(2 + tmp.Length));
//Coding the choice for user-information (Octet STRING, universal)
data.SetUInt8(BerType.OctetString);
//Length
data.SetUInt8((byte)tmp.Length);
data.Set(tmp);
data.SetUInt8((UInt16)(offset + 1), (byte)(data.Size - offset - 2));
}
