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Search found 12 matches

by Rasiand
Thu Jul 06, 2017 6:17 am
Forum: Questions & Answers
Topic: Secure Messaging
Replies: 3
Views: 1886

Re: Secure Messaging

I have tried but it return with 6E00( Class not supported). I guess SELECT command is sent in plain outside the secure channel.
by Rasiand
Wed Jul 05, 2017 3:16 am
Forum: Questions & Answers
Topic: Secure Messaging
Replies: 3
Views: 1886

Secure Messaging

I am using SCP01 with static key 40 41 42..4F to protect the READ BINARY APDU. And the external authentication is successful. But I always got error status word 6982 (Security condition not satisfied). Could anyone figure out the reason? Thank you. >> 80 50 00 00 08 00 00 00 00 00 00 00 00 << 00 00 ...
by Rasiand
Wed Apr 12, 2017 11:16 pm
Forum: Questions & Answers
Topic: Native methods on javacard
Replies: 2
Views: 1762

Native methods on javacard

Hey all,

Can I perform Native java methods in java card?

Thanks&regards,

Rasiand
by Rasiand
Fri Nov 25, 2016 1:46 am
Forum: Questions & Answers
Topic: Different performance under different protocol
Replies: 1
Views: 1536

Different performance under different protocol

Hi everyone in here, I am experiencing a strange problem now . When I sent "8060000004" command, the applet performed differently under T0 and T1 protocol. T0 protocol: It threw"6F00" while running into this code line short le = apdu.setOutgoing(); T1 protocol: It can return test...
by Rasiand
Fri Sep 30, 2016 3:55 am
Forum: Questions & Answers
Topic: Failed to read data from the card
Replies: 2
Views: 1362

Re: Failed to read data from the card

I can successfully write and read a smaller data from the card using extended length apdu.
by Rasiand
Thu Sep 29, 2016 11:48 pm
Forum: Questions & Answers
Topic: Failed to read data from the card
Replies: 2
Views: 1362

Failed to read data from the card

Hello!

I can write a large data into the card successfully by sending extended length APDU. But When I try to read the same length data back from the card, it always failed.

Does anyone know the reason?
by Rasiand
Thu Jun 30, 2016 3:23 am
Forum: Questions & Answers
Topic: the max size of atomic transaction buffer
Replies: 3
Views: 1885

Re: the max size of atomic transaction buffer

wousim wrote:It‘s set by the card manufacturer.

There are several methods in the JCSystem class that can do this - getMaxCommitCapacity and getUnusedCommitCapacity.


If I know nothing about the max size of this buffer, Can I just beginTransaction and never invoke commitTransaction ?
by Rasiand
Wed Jun 29, 2016 4:36 am
Forum: Questions & Answers
Topic: the max size of atomic transaction buffer
Replies: 3
Views: 1885

the max size of atomic transaction buffer

As we all know, atomic transaction buffer is used to log changes in order to help JCRE rollback in case of failed command. But I don't know the max size of this buffer. Could I just beginTransaction and never invoke commitTransaction ?

Thanks
by Rasiand
Wed Jun 15, 2016 5:20 am
Forum: Questions & Answers
Topic: RuntimeException v.s. Exception
Replies: 2
Views: 1602

Re: RuntimeException v.s. Exception

This is just my understanding.
RuntimeException is there to specify normal exceptions.
Exception is there to handle bigger scope, with all types of exception.
by Rasiand
Wed Jun 15, 2016 2:02 am
Forum: Questions & Answers
Topic: RuntimeException v.s. Exception
Replies: 2
Views: 1602

RuntimeException v.s. Exception

Could any one clarify the difference between RuntimeException and Exception? In my opinion, every exception must happen at run time, and therefore, I think we only need RuntimeException. There is no need for Exception.
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