///<summary>
///CodeData
///</summary>
internal void CodeData(List <byte> data, InterfaceType interfaceType)
{
//AARQ APDU Tag
data.Add(GXCommon.AARQTag);
//Length
int LenPos = data.Count;
data.Add(0);
///////////////////////////////////////////
// Add Application context name.
ApplicationContextName.CodeData(data);
GetAuthenticationString(data);
UserInformation.CodeData(data);
//Add extra tags...
if (Tags != null)
{
for (int a = 0; a < Tags.Count; ++a)
{
GXDLMSTag tag = Tags[a];
if (tag != null)
{
//Add data ID.
data.Add((byte)tag.ID);
//Add data len.
data.Add((byte)tag.Data.Length);
//Add data.
data.AddRange(tag.Data);
}
}
}
data[LenPos] = (byte)(data.Count() - LenPos - 1);
}
///<summary>
///EncodeData
///</summary>
internal void EncodeData(byte[] buff, ref int index)
{
// Get AARE tag and length
int tag = buff[index++];
if (tag != 0x61 && tag != 0x60 && tag != 0x81 && tag != 0x80)
{
throw new Exception("Invalid tag.");
}
int len = buff[index++];
int size = buff.Length - index;
if (len > size)
{
throw new Exception("Not enought data.");
}
while (index < buff.Length)
{
tag = buff[index];
if (tag == 0xA1)
{
ApplicationContextName.EncodeData(buff, ref index);
}
else if (tag == 0xBE)
{
if (ResultValue != AssociationResult.Accepted && ResultDiagnosticValue != SourceDiagnostic.None)
{
return;
}
UserInformation.EncodeData(buff, ref index);
}
else if (tag == 0xA2) //Result
{
tag = buff[index++];
len = buff[index++];
//Choice for result (INTEGER, universal)
tag = buff[index++];
len = buff[index++];
ResultValue = (AssociationResult)buff[index++];
}
else if (tag == 0xA3) //SourceDiagnostic
{
tag = buff[index++];
len = buff[index++];
// ACSE service user tag.
tag = buff[index++];
len = buff[index++];
// Result source diagnostic component.
tag = buff[index++];
len = buff[index++];
ResultDiagnosticValue = (SourceDiagnostic)buff[index++];
}
else if (tag == 0x8A || tag == 0x88) //Authentication.
{
tag = buff[index++];
//Get sender ACSE-requirenents field component.
if (buff[index++] != 2)
{
throw new Exception("Invalid tag.");
}
int val = GXCommon.GetUInt16(buff, ref index);
if (val != 0x0780 && val != 0x0680)
{
throw new Exception("Invalid tag.");
}
}
else if (tag == 0xAA) //Server Challenge.
{
tag = buff[index++];
len = buff[index++];
++index;
len = buff[index++];
//Get challenge
index += len;
}
else if (tag == 0x8B || tag == 0x89) //Authentication.
{
tag = buff[index++];
len = buff[index++];
bool IsAuthenticationTag = len > 7;
if (buff[index++] != 0x60)
{
throw new Exception("Invalid tag.");
}
if (buff[index++] != 0x85)
{
throw new Exception("Invalid tag.");
}
if (buff[index++] != 0x74)
{
throw new Exception("Invalid tag.");
}
if (buff[index++] != 0x05)
{
throw new Exception("Invalid tag.");
}
if (buff[index++] != 0x08)
{
throw new Exception("Invalid tag.");
}
if (buff[index++] != 0x02)
{
throw new Exception("Invalid tag.");
}
int tmp = buff[index++];
if (tmp < 0 || tmp > 5)
{
throw new Exception("Invalid tag.");
}
if (IsAuthenticationTag)
{
Authentication = (Authentication)tmp;
byte tag2 = buff[index++];
if (tag2 != 0xAC && tag2 != 0xAA)
{
throw new Exception("Invalid tag.");
}
len = buff[index++];
//Get authentication information.
if (buff[index++] != 0x80)
{
throw new Exception("Invalid tag.");
}
len = buff[index++];
Password = new byte[len];
Array.Copy(buff, index, Password, 0, len);
index += len;
}
else
{
Authentication = Authentication.None;
}
}
//Unknown tags.
else
{
tag = buff[index++];
len = buff[index++];
if (Tags != null)
{
GXDLMSTag tmp = new GXDLMSTag();
tmp.ID = tag;
tmp.Data = new byte[len];
tmp.Data = GXCommon.Swap(buff, index, len);
Tags.Add(tmp);
}
index += len;
}
}
}
///<summary>
///EncodeData
///</summary>
internal void EncodeData(byte[] buff, ref int index)
{
// Get AARE tag and length
int tag = buff[index++];
if (tag != 0x61 && tag != 0x60 && tag != 0x81 && tag != 0x80)
{
throw new Exception("Invalid tag.");
}
int len = buff[index++];
int size = buff.Length - index;
if (len > size)
{
throw new Exception("Not enough data.");
}
while (index < buff.Length)
{
tag = buff[index];
if (tag == 0xA1)
{
ApplicationContextName.EncodeData(buff, ref index);
}
else if (tag == 0xBE)
{
if (ResultValue != AssociationResult.Accepted && ResultDiagnosticValue != SourceDiagnostic.None)
{
return;
}
UserInformation.EncodeData(buff, ref index);
}
else if (tag == 0xA2) //Result
{
tag = buff[index++];
len = buff[index++];
//Choice for result (INTEGER, universal)
tag = buff[index++];
len = buff[index++];
ResultValue = (AssociationResult)buff[index++];
}
else if (tag == 0xA3) //SourceDiagnostic
{
tag = buff[index++];
len = buff[index++];
// ACSE service user tag.
tag = buff[index++];
len = buff[index++];
// Result source diagnostic component.
tag = buff[index++];
len = buff[index++];
ResultDiagnosticValue = (SourceDiagnostic)buff[index++];
}
else if (tag == 0x8A || tag == 0x88) //Authentication.
{
tag = buff[index++];
//Get sender ACSE-requirements field component.
if (buff[index++] != 2)
{
throw new Exception("Invalid tag.");
}
int val = GXCommon.GetUInt16(buff, ref index);
if (val != 0x0780 && val != 0x0680)
{
throw new Exception("Invalid tag.");
}
}
else if (tag == 0xAA) //Server Challenge.
{
tag = buff[index++];
len = buff[index++];
++index;
len = buff[index++];
//Get challenge and save it to the PW.
Password = new byte[len];
Array.Copy(buff, index, Password, 0, len);
index += len;
}
else if (tag == 0xAC) //Password.
{
tag = buff[index++];
len = buff[index++];
//Get authentication information.
if (buff[index++] != 0x80)
{
throw new Exception("Invalid tag.");
}
len = buff[index++];
//Get password.
Password = new byte[len];
Array.Copy(buff, index, Password, 0, len);
index += len;
}
else if (tag == 0x8B || tag == 0x89) //Authentication.
{
tag = buff[index++];
len = buff[index++];
if (buff[index++] != 0x60)
{
throw new Exception("Invalid tag.");
}
if (buff[index++] != 0x85)
{
throw new Exception("Invalid tag.");
}
if (buff[index++] != 0x74)
{
throw new Exception("Invalid tag.");
}
if (buff[index++] != 0x05)
{
throw new Exception("Invalid tag.");
}
if (buff[index++] != 0x08)
{
throw new Exception("Invalid tag.");
}
if (buff[index++] != 0x02)
{
throw new Exception("Invalid tag.");
}
int tmp = buff[index++];
if (tmp < 0 || tmp > 5)
{
throw new Exception("Invalid tag.");
}
Authentication = (Authentication)tmp;
}
//Unknown tags.
else
{
tag = buff[index++];
len = buff[index++];
if (Tags != null)
{
GXDLMSTag tmp = new GXDLMSTag();
tmp.ID = tag;
tmp.Data = new byte[len];
tmp.Data = GXCommon.Swap(buff, index, len);
Tags.Add(tmp);
}
index += len;
}
}
}
