/// <summary>
/// Read the bock at the specified address
/// </summary>
/// <returns> Bool to indicate success</returns>
public static Boolean Mifair_Read_Block(Mifare_key KeyAB, int key_num, int block_num, out Byte[] BR)
{
byte[] retdata;
BR = new byte[0];
if (MernokRFID.IsOpen())
{
// send Read command
if (KeyAB == Mifare_key.B)
{
key_num |= 0x80;
}
byte[] command = new byte[] { (byte)'R', (byte)block_num, (byte)key_num };
if (MernokRFID.SendRec(out retdata, command))
{
if ((retdata.Length == 17) && ((retdata[0] == 0x86) || (retdata[0] == 0x96))) // Tag answer OK
{
BR = new byte[16];
Array.Copy(retdata, 1, BR, 0, 16);
return(true);
}
else
{
return(false);
}
}
else
{
return(false);
}
}
else
{
MernokRFID.OpenRFID(Mode.Mifare);
if (MernokRFID.IsOpen())
{
return(Mifair_Read_Block(KeyAB, key_num, block_num, out BR));
}
else
{
return(false);
}
}
}
/// <summary>
/// Write the block to a Mifare card at the specified address
/// </summary>
/// <returns> bool to indicate success</returns>
public static Boolean Mifare_Write_Block(Mifare_key KeyAB, int key_num, int block_num, Byte[] data)
{
Byte[] BR = new Byte[19];
byte[] retdata;
if (MernokRFID.IsOpen())
{
// send Write command
BR[0] = (byte)'W';
BR[1] = (byte)(block_num);
BR[2] = (byte)((int)KeyAB | key_num);
int len = Math.Min(16, data.Length);
// copy as many bytes as possible.
Array.Copy(data, 0, BR, 3, len);
if (MernokRFID.SendRec(out retdata, BR))
{
if ((retdata.Length == 1) && ((retdata[0] == 0x86) || (retdata[0] == 0x96))) // Tag answer OK
{
return(true);
}
else
{
return(false);
}
}
else
{
return(false);
}
}
else
{
MernokRFID.OpenRFID(Mode.Mifare);
if (MernokRFID.IsOpen())
{
return(Mifare_Write_Block(KeyAB, key_num, block_num, data));
}
else
{
return(false);
}
}
}
