private byte[] SHA1(byte[] data, int offset, int count, bool final)
{
byte returnBytes = final ? (byte)20 : (byte)0;
Comms.WriteReset();
Comms.WriteByte((byte)eClass.CLA_CRYPTO); //Class Instruction for Cryptographic Functions
Comms.WriteByte((byte)eFunction.INS_CRYPTO_HASH); //Instruction Code for Cryptographic HASH Function
Comms.WriteByte((byte)eP1.P1_CRYPTO_HASH_SHA1); //Parameter (P1) for SHA-1 hash function
Comms.WriteByte(final ? (byte)eP2.P2_FINAL : (byte)eP2.P2_MORE); //Parameter (P1) for SHA-1 hash function
Comms.WriteEncodedLength((UInt16)count); // L
Comms.Write(data, offset, count); //N bytes of data
Comms.WriteByte(returnBytes); //0x14 20-byte hash of expected return
return(Comms.Execute(returnBytes));
}
UInt16 SASPreUpgrade(byte[] data, int offset, int count)
{
Console.WriteLine("Entering firmware upgrade mode");
Comms.WriteReset();
Comms.WriteByte((byte)eClass.CLA_DIAG); //Class Instruction for Firmware upgrade CLA_DIAG
Comms.WriteByte((byte)eFunction.INS_DIAG_FIRMWARE_UPDATE); //INS_DIAG_FIRMWARE_UPDATE
Comms.WriteByte(0x02); //Instruction Code for Cryptographic HASH Function
Comms.WriteByte((byte)eP2.P2_FINAL); //P2_FINAL
Comms.WriteEncodedLength((UInt16)count); // L
Comms.Write(data, offset, count); //N bytes of data
UInt16 errCode;
Comms.Execute(0, out errCode);
return(errCode);
}
public byte[] Factom_Sign(byte[] data, int offset, int count)
{
const byte returnBytes = 64;
Comms.WriteReset();
Comms.WriteByte((byte)eClass.CLA_FACTOM); //Class Instruction for Cryptographic Functions
Comms.WriteByte((byte)eFunction.INS_FACTOM_SIGN_ENTRY); //Instruction Code for Cryptographic HASH Function
Comms.WriteByte((byte)eP1.P1_CRYPTO_HASH_SHA256); //Parameter (P1) for SHA-1 hash function
Comms.WriteByte((byte)eP2.P2_FACTOM_ADDRESS_ID); //Parameter (P2) reserved for future use
Comms.WriteEncodedLength((UInt16)count); // L
Comms.Write(data, offset, count); // N bytes of data
Comms.WriteByte(returnBytes); // 64 byte hash of expected return
return(Comms.Execute(returnBytes));
}
public void IncrementMonotonicCounter(byte[] upperSeed = null)
{
const byte returnBytes = 0x40;
Comms.WriteReset();
Comms.WriteByte((byte)eClass.CLA_DIAG); //Class Instruction for Utility Functions
Comms.WriteByte((byte)eFunction.INS_CRYPTO_MONOTONIC_COUNTER); //Instruction Code for Monotonic Counter
Comms.WriteByte(0x00); //Parameter (P1) reserved for future use
Comms.WriteByte(0x00); //Parameter (P2) reserved for future use
if (upperSeed != null)
{
Comms.WriteByte(0x04); // R
Comms.Write(upperSeed);
}
Comms.WriteByte(returnBytes); // this is the size of the returned 64-bit monotonic counter
}