/// <summary>
/// Does the writing of transaction data to the user button as well
/// as actually signing the data with the coprocessor.
///
/// No need to synchronize wince the methods that call this
/// private method will be synchronized.
/// </summary>
private bool writeTransactionData(SHAiButtonUser user, int transID, int balance, byte[] accountData)
{
//init local vars
int acctPageNum = user.AccountPageNumber;
// data type code - dynamic: 0x00, static: 0x01
accountData[I_DATA_TYPE_CODE] = 0x01;
// conversion factor - 2 data bytes
accountData[I_CONVERSION_FACTOR + 0] = 0x8B;
accountData[I_CONVERSION_FACTOR + 1] = 0x48;
// zero-out the don't care bytes
accountData[I_DONT_CARE] = 0x00;
accountData[I_DONT_CARE + 1] = 0x00;
accountData[I_DONT_CARE + 2] = 0x00;
accountData[I_DONT_CARE + 3] = 0x00;
if (accountData[I_FILE_LENGTH] == RECORD_A_LENGTH)
{
OneWireEventSource.Log.Debug("Was A, now using B");
// length of the TMEX file
accountData[I_FILE_LENGTH] = RECORD_B_LENGTH;
// account balance - 3 data bytes
Convert.toByteArray(balance, accountData, I_BALANCE_B, 3);
// transaction ID - 2 data bytes
accountData[I_TRANSACTION_ID_B + 0] = (byte)transID;
accountData[I_TRANSACTION_ID_B + 1] = (byte)((int)((uint)transID >> 8));
// continuation pointer for TMEX file
accountData[I_CONTINUATION_PTR_B] = 0x00;
// clear out the crc16 - 2 data bytes
accountData[I_FILE_CRC16_B + 0] = 0x00;
accountData[I_FILE_CRC16_B + 1] = 0x00;
// dump in the inverted CRC
int crc = ~CRC16.compute(accountData, 0, accountData[I_FILE_LENGTH] + 1, acctPageNum);
accountData[I_FILE_CRC16_B + 0] = (byte)crc;
accountData[I_FILE_CRC16_B + 1] = (byte)(crc >> 8);
}
else
{
OneWireEventSource.Log.Debug("Was B, now using A");
// length of the TMEX file
accountData[I_FILE_LENGTH] = RECORD_A_LENGTH;
// account balance - 3 data bytes
Convert.toByteArray(balance, accountData, I_BALANCE_A, 3);
// transaction ID - 2 data bytes
accountData[I_TRANSACTION_ID_A + 0] = (byte)transID;
accountData[I_TRANSACTION_ID_A + 1] = (byte)((int)((uint)transID >> 8));
// continuation pointer for TMEX file
accountData[I_CONTINUATION_PTR_A] = 0x00;
// clear out the crc16 - 2 data bytes
accountData[I_FILE_CRC16_A + 0] = 0x00;
accountData[I_FILE_CRC16_A + 1] = 0x00;
// dump in the inverted CRC
int crc = ~CRC16.compute(accountData, 0, accountData[I_FILE_LENGTH] + 1, acctPageNum);
accountData[I_FILE_CRC16_A + 0] = (byte)crc;
accountData[I_FILE_CRC16_A + 1] = (byte)(crc >> 8);
}
OneWireEventSource.Log.Debug("------------------------------------");
OneWireEventSource.Log.Debug("writing transaction data");
OneWireEventSource.Log.Debug("acctPageNum: " + acctPageNum);
OneWireEventSource.Log.Debug("accountData: " + Convert.toHexString(accountData));
OneWireEventSource.Log.Debug("------------------------------------");
// write it to the button
try
{
if (user.writeAccountData(accountData, 0))
{
return(true);
}
}
catch (OneWireException owe)
{
OneWireEventSource.Log.Debug(owe.ToString());
}
this.lastError = SHATransaction.USER_WRITE_DATA_FAILED;
return(false);
}
/// <summary>
/// Does the writing of transaction data to the user button as well
/// as actually signing the data with the coprocessor.
/// </summary>
private bool writeTransactionData(SHAiButtonUser user, int transID, int balance, byte[] accountData)
{
//init local vars
SHAiButtonCopr copr = this.copr;
int acctPageNum = user.AccountPageNumber;
byte[] scratchpad = this.writeTransactionData_scratchpad;
// length of the TMEX file - 28 data, 1 cont. ptr
accountData[I_FILE_LENGTH] = (byte)29;
// transaction ID - 2 data bytes
accountData[I_TRANSACTION_ID + 0] = (byte)transID;
accountData[I_TRANSACTION_ID + 1] = (byte)((int)((uint)transID >> 8));
// conversion factor - 2 data bytes
accountData[I_CONVERSION_FACTOR + 0] = 0x8B;
accountData[I_CONVERSION_FACTOR + 1] = 0x48;
// account balance - 3 data bytes
Convert.toByteArray(balance, accountData, I_BALANCE, 3);
// initial signature - 20 data bytes
copr.getInitialSignature(accountData, I_SIGNATURE);
// data type code - dynamic: 0x00, static: 0x01
accountData[I_DATA_TYPE_CODE] = 0x01;
// continuation pointer for TMEX file
accountData[I_CONTINUATION_PTR] = 0x00;
// clear out the crc16 - 2 data bytes
accountData[I_FILE_CRC16 + 0] = 0x00;
accountData[I_FILE_CRC16 + 1] = 0x00;
//we need to increment the writeCycleCounter since we will be writing to the part
int wcc = user.WriteCycleCounter;
if (wcc > 0)
{
//copy the write cycle counter into scratchpad
Convert.toByteArray(wcc + 1, scratchpad, 8, 4);
}
else
{
if (user.hasWriteCycleCounter())
{
// failed to read account data
this.lastError = SHATransaction.USER_READ_AUTH_FAILED;
return(false);
}
Array.Copy(ffBlock, 0, scratchpad, 8, 4);
}
// svcPageNumber, followed by address of device
scratchpad[12] = (byte)acctPageNum;
user.getAddress(scratchpad, 13, 7);
// copy in the signing challenge
copr.getSigningChallenge(scratchpad, 20);
// sign the data, return the mac right into accountData
copr.createDataSignature(accountData, scratchpad, accountData, I_SIGNATURE);
//after signature make sure to dump in the inverted CRC
int crc = ~CRC16.compute(accountData, 0, accountData[I_FILE_LENGTH] + 1, acctPageNum);
//set the the crc16 bytes
accountData[I_FILE_CRC16 + 0] = (byte)crc;
accountData[I_FILE_CRC16 + 1] = (byte)(crc >> 8);
//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//
OneWireEventSource.Log.Debug("------------------------------------");
OneWireEventSource.Log.Debug("writing transaction data");
OneWireEventSource.Log.Debug("acctPageNum: " + acctPageNum);
OneWireEventSource.Log.Debug("accountData: " + Convert.toHexString(accountData));
OneWireEventSource.Log.Debug("------------------------------------");
//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//
// write it to the button
try
{
if (user.writeAccountData(accountData, 0))
{
return(true);
}
}
catch (OneWireException owe)
{
OneWireEventSource.Log.Debug(owe.ToString());
}
this.lastError = SHATransaction.USER_WRITE_DATA_FAILED;
return(false);
}
