Search found 30 matches
- Tue Dec 04, 2018 11:38 pm
- Forum: Shopping FAQ
- Topic: Stickers format for JC30M48CR
- Replies: 2
- Views: 24303
Stickers format for JC30M48CR
Hi JavaCardOS official, I have test JC30M48CR cards and up to now we have good experience with your cards.But there is a new requirement in our project. We need the this card to be stickers format. Can you provide this customization service for this card? If YES, please let me know. Thanks& regards,...
- Fri Oct 13, 2017 3:53 am
- Forum: Questions & Answers
- Topic: Doubt about JavaCard Memory
- Replies: 3
- Views: 8070
Re: Doubt about JavaCard Memory
When you create a byte array, all values are initialized to 0. Looking at your loops, it seems you're adding 0's only. Smart card operating systems normally do a read before write, to make sure not the same value is written. It saves time, and in case of EEPROM also to prolong the lifetime. I think ...
- Mon Oct 02, 2017 12:44 am
- Forum: Questions & Answers
- Topic: Cryptographic operations with the Card Manager
- Replies: 3
- Views: 8608
Re: Cryptographic operations with the Card Manager
Due to security reasons reading the key back is prohibited. You can only get information what type of key is stored.
- Sun Oct 01, 2017 5:25 pm
- Forum: Questions & Answers
- Topic: Cryptographic operations with the Card Manager
- Replies: 3
- Views: 8608
Re: Cryptographic operations with the Card Manager
You cannot do cryptographic operations with ISD. You must write an applet and use KeyPair and Signature class.
- Fri Sep 15, 2017 5:14 am
- Forum: Questions & Answers
- Topic: Error 6E00 when receiving the response data under T0
- Replies: 2
- Views: 6940
Re: Error 6E00 when receiving the response data under T0
For T=0, JCRE needs to send 61xx , where xx is the number of expected bytes. The CAD then sends a GET RESPONSE, with the same CLA byte as before and Le == xx. Finally the JCRE send the response.
- Fri Sep 15, 2017 4:15 am
- Forum: Questions & Answers
- Topic: command usage of GET-DATA and STORE-DATA
- Replies: 1
- Views: 6347
Re: command usage of GET-DATA and STORE-DATA
You cannot use all the Data Grouping Index, 2 byte TLV . Some are already populated and can only be read, others cannot be written. Use the 0070 Data Grouping Index to put your data into the Security Domain's data store.
- Fri Aug 11, 2017 3:40 am
- Forum: Questions & Answers
- Topic: TCP of Java Card 3.0
- Replies: 1
- Views: 5535
Re: TCP of Java Card 3.0
TCP is mandatory, and APDU is mandatory as well, as you need to be compatible to the Classic Edition. You need to run a server on the card and your communication layer has to process the TCP over IP/UDP/USB packets beforehand.
- Sat May 27, 2017 5:26 am
- Forum: Questions & Answers
- Topic: Find the data back in Buffer
- Replies: 3
- Views: 7408
- Tue Jan 24, 2017 4:07 am
- Forum: Questions & Answers
- Topic: How to use keyBuilder class
- Replies: 3
- Views: 8348
Re: How to use keyBuilder class
Build a key using keybuilder methods and cast: RSAPublicKey k1 = (RSAPublicKey)KeyBuilder.buildKey(KeyBuilder.TYPE_RSA_PUBLIC, KeyBuilder.LENGTH_RSA_1024); Then, use: k1.setExponent(bytearray, offsettoexponent); k1.setModulus(bytearray, offsettomodulus); k1.getExponent(destination, wheretostore); .....
- Mon Jan 16, 2017 5:38 am
- Forum: Questions & Answers
- Topic: supplementary security domain
- Replies: 1
- Views: 5933
Re: supplementary security domain
A SSD does not have the same functionality as an ISD. ISD is open in GP terms. Cards may have a load file pre-loaded that can instantiate an SSD.