/// <summary> /// Process READ BINARY instruction (CC2) /// <para> /// C-APDU: <code>00 B0 {P1-P2: offset} {Le}</code> /// </para> /// <para> /// R-APDU when an EF is selected: <code>{data in EF}</code> /// </para> /// <para> /// R-APDU when no EF is selected: <code>{headers of EF in current DF}</code> /// </para> /// </summary> /// <param name="apdu"></param> /// <returns></returns> private IFakeCardFeedback ProcessRead(CommandAPDU apdu) { short le = apdu.SetOutgoing(); // in BYTES short wordCount = (short)((short)(le + 3) / 4); byte[] buffer = JCSystem.makeTransientByteArray((short)(wordCount * 4), JCSystem.CLEAR_ON_DESELECT); short offset; if (_currentEF != null) { // an EF is selected ==> read binary offset = Util.getShort(apdu.GetBuffer(), JavaCard.ISO7816.OFFSET_P1); // in WORDS byte[] header = JCSystem.makeTransientByteArray(8, JCSystem.CLEAR_ON_DESELECT); _currentEF.GetHeader(header, 0); _headerParser.Parse(header, 0, 8); offset += (short)(_currentEF.Read(offset, buffer, 0, wordCount, _headerParser.fileType == HeaderParser.FILETYPE_EFSZ) << 2); } else { // no EF selected ==> DIR offset = 0; byte currentChildNumber = 0; File fileChild = _currentDF.GetChild(currentChildNumber); // get header of each file in current DF while (fileChild != null && offset < le) { fileChild.GetHeader(buffer, offset); offset += (short)(fileChild.GetHeaderSize() << 2); fileChild = _currentDF.GetChild(++currentChildNumber); } } // Pad with FF Util.arrayFillNonAtomic(buffer, offset, (short)(le - offset), (byte)MemoryState.Free); // and send data! apdu.SetOutgoingLength(le); return(apdu.SendBytesLong(buffer, 0, le)); }
/// <summary> /// Process WRITE BINARY instruction (CC3) /// <para> /// C-APDU: <code>00 B0 {offset} {Lc} {data} </code> /// </para> /// <list type="table"> /// <item> /// <term>offset</term> /// <description>offset of first word of the file coded by P1 P2 (WORDS) to be written.</description> /// </item> /// <item> /// <term>data</term> /// <description>data to be written in file.</description> /// </item> /// </list> /// </summary> /// <param name="apdu"></param> /// <returns></returns> private IFakeCardFeedback ProcessWrite(CommandAPDU apdu) { // TODO: check ==> security of current EF byte[] apduBuffer = apdu.GetBuffer(); apdu.SetIncomingAndReceive(); short offset = Util.getShort(apduBuffer, JavaCard.ISO7816.OFFSET_P1); // in WORDS short length = APDUHelpers.getIncomingLength(apdu); // in BYTES short wordCount = (short)((short)(length + 3) / 4); // length in WORDS // availability check VerifyOutOfFile(offset, wordCount); if (!_currentEF.IsAvailable(offset, wordCount)) { ISOException.throwIt(JavaCard.ISO7816.SW_WRONG_LENGTH); } // copy data in a buffer byte[] buffer = JCSystem.makeTransientByteArray((short)(wordCount * 4), JCSystem.CLEAR_ON_DESELECT); short udcOffset = APDUHelpers.getOffsetCdata(apdu); Util.arrayCopyNonAtomic(apduBuffer, udcOffset, buffer, 0, length); // complete words with FF in buffer short iMax = (short)(wordCount * 4); for (short i = length; i < iMax; i++) { buffer[i] = 0xFF; } // and write data to file _currentEF.Write(buffer, 0, offset, wordCount); return(FakeCardFeedback.FromSuccess(unchecked ((short)0x9000))); }