apdu

I have been trying to write some data to my mifare classic cards. first I send these two commands which returns 90 00: Load Mifare Keys: FF 82 20 01 06 FF FF FF FF FF FF Authenticate: FF 86 00 00 05 01 00 01 60 01 now I can write commands to sector 0 and block 1 + 2 ff d6 00 01 10 14 01 03 E1 03 E1 03 E1 03 E1 03 E1 03 E1 03 E1 ff d6 00 02 10 03 E1 03 E1 03 E1 03 E1 03 E1 03 E1 03 E1 03 E1 i mistakenly overwritten block 3 a few times rendering this sector unreadable it seems: if I send the command ff d6 00 04 10 I get return error 69 82 which i googled as authentication error do I need to

I want to send an APDU with a length of 1699 bytes via NFC (class IsoDep ) to a Java Card smartcard. I get the error java.io.IOException: Transceive length exceeds supported maximum My phone is a Samsung Galaxy S7. I use extended-length in my applet on the card. I have verified that the card supports extended length. I tested this via pyapdutool by sending an APDU with 4000 bytes to the card. I found that when I write this code, the result is false : final Tag t = (Tag) tag; myTag = IsoDep.get(t); boolean result = myTag.isExtendedLengthApduSupported(); I have this in my manifest: <activity

I have a ACR38 samrt-card-reader and a number of Javacard [2.1.1] compliant with GP Spec [02]. As I know, there is two kind of APDU, Short-APDU [APDU with LC or/and LE shorter than 255 ] and Extended-APDU [APDU with LC or/and LE greater than 255 ]. is that right? We send Short-APDU in T=0 protocol and send Extended-APDU in T=1 protocol. is that right? I sent Short-APDU to my card successfully. [via GPJ , GPShell , OpenSC-Tool ]. And now, I want to know: 1: if I want to use Extended APDU, my card must support it? or my Reader must support it? or both!? or all the cards and all the readers

I'm new to the whole topic of Java Card and tried to look at a few code examples to get a better understanding. I found a sample for AES usage in the oracle forum but have a few problems with the following part: private void doAES(APDU apdu) { byte b[] = apdu.getBuffer(); short incomingLength = (short) (apdu.setIncomingAndReceive()); if (incomingLength != 24) ISOException.throwIt(ISO7816.SW_WRONG_LENGTH); //perform encryption and append results in APDU Buffer a[] automatically cipherAES.init(aesKey, Cipher.MODE_ENCRYPT); cipherAES.doFinal(b, (short) dataOffset, incomingLength, a, (short)

I try to access a SmartCard via C++. I got already the Connection and the CardHandle. But when I send an APDU Command via SCardTransmit, i'll get 6E 00 as the answer from the card. No matter which APDU Command i send. Everytime 6E 00. For Example: FF CA FA 00 00 (Card's ATR - Answer To Reset) or FF CA FF 82 00 (Product name in ASCII) The same thing when i send the Command with an PC/SC Testtootl like "PC/SC Diag". Has anybody an Idea what the meaning of this Error-Code and how to solve the problem? Please help me !!!! ;-) According to ISO 7816-4 0x6E00 means "Class not supported". Are you