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tomc2016

Use the code below to know the length of data field. process(Apdu apdu) { // Lc tells us the incoming apdu command length short bytesLeft = (short) (buffer[ISO7816.OFFSET_LC] & 0x00FF); // you may also use APDU class method short readCount = apdu.setIncomingAndReceive(); }

tomc2016

I changed the sig_buffer to 200, and the sign function is working now

,but the verify function still throws error 0x6F00.

tomc2016

I am going to generate and verify a signature for some dummy data on a Java Card. It's strange that I always got error code 6F00. I also tried to debug the applet to confirm where the problem is, but failed. Any clue? private void signIt(APDU apdu) { byte[] buffer = apdu.getBuffer(); RSASign = Signa...

tomc2016

Using GET STATUS command can also get Card Manager AID.

tomc2016

Don't use RSA512 to do the computations. Use RSA1024 or RSA2048 instead. The computation speed of RSA1024 and RSA2048 is also very fast.

tomc2016

It's possibly because the ICV encryption does not match what your card expects.

tomc2016

Some java card has built-in support for CRC32, but some java card doesn't support CRC32 and you have to implement it by yourself.

tomc2016

For JCOP card, you can ask your card agency from whom you buy the card for the method.

I bought some JCOP J3D081 cards from this eshop about six months ago. And I also asked JavaCardOS for the method to switch the SCP and then he sent me a script to do it.

tomc2016

You can measure the time from the host application. Let's say that you can measure the time when the command is sent until a response is received.

tomc2016

Hi! I need several J3D081 cards and A40CR cards. If I place the order today, when will you make the delivery? How long does it takes to arrive Slovakia?

Search found 12 matches

Re: How to know the APDU length that has been sent to the application?

Re: Error 6F00 when generating and verifying a signature

Error 6F00 when generating and verifying a signature

Re: Get Card Manager ID

Re: Throw CryptoException when signing

Re: CAN'T calculate C-MAC

Re: CRC32 on java card

Re: Set JCOP to SCP01

Re: Performance measures about an applet

J3D081 cards and A40CR cards to Slovakia

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