Search found 53 matches
- Mon Sep 17, 2018 1:22 am
- Forum: Questions & Answers
- Topic: A question of PKCS5
- Replies: 2
- Views: 6412
A question of PKCS5
Hi, everyone. Anyone know how to calculate PKCS5 padding algorithm? I knew that the PKCS5 padding algorithm fills bytes at the end of data until the length of total data is multiple block size. For example, AES block size is 32 bytes. And the data is 30 bytes. The padding bytes is "0202". If the dat...
- Sat Sep 15, 2018 11:03 pm
- Forum: Questions & Answers
- Topic: I have a question about API getAvailableMemory
- Replies: 1
- Views: 5060
Re: I have a question about API getAvailableMemory
First, in Java, there is no unsigned number. So it must be a signed number.
Second, array indicates a big number. conjecture according to general carry, it should be total memory = array[0]*32767 + array[1].
Second, array indicates a big number. conjecture according to general carry, it should be total memory = array[0]*32767 + array[1].
- Sat Sep 15, 2018 10:58 pm
- Forum: Questions & Answers
- Topic: I have a question about generateSecret
- Replies: 3
- Views: 6940
Re: I have a question about generateSecret
I don't think so.
The "inconsistent" may mean "the public point " not on the curve of the private key. If the result is point-at-infinity, the return value may be 0. After all, the return is "byte length of secret".
All these are my conjectures. I hope it will help you.
The "inconsistent" may mean "the public point " not on the curve of the private key. If the result is point-at-infinity, the return value may be 0. After all, the return is "byte length of secret".
All these are my conjectures. I hope it will help you.
- Tue Sep 11, 2018 5:13 am
- Forum: Questions & Answers
- Topic: How to establish Secure Channel
- Replies: 1
- Views: 5680
Re: How to establish Secure Channel
The Secure Channel provides a secure communication channel between a card and an off-card entity during an Application Session. Do you know the Secure Channel key set of the application or the security domain keys ? Only you know the key, you can establish the secure channel. The 10 chapter of Globa...
- Tue Sep 11, 2018 4:57 am
- Forum: Questions & Answers
- Topic: Why my ccid cannot send the message which the length is equal to package length
- Replies: 1
- Views: 4823
Re: Why my ccid cannot send the message which the length is equal to package length
I got the answer from <Device Class: Smart Card>. The CCID is required to send a Zero Length Packet (ZLP) following any Bulk-In message that is a multiple of MaxPacketSize. This ZLP allows the CCID device driver to be more efficient, and is generally considered “good-practice” for USB bulk-in pipes....
- Fri Aug 31, 2018 2:54 am
- Forum: Questions & Answers
- Topic: Why my ccid cannot send the message which the length is equal to package length
- Replies: 1
- Views: 4823
Why my ccid cannot send the message which the length is equal to package length
Hello, everybody~
lately, I implement the CCID protocol. Then I test it. The first problem appeared. If the length of message is package length, the communication would become silent. Other circumstances, the communication is ok. You could help me?
lately, I implement the CCID protocol. Then I test it. The first problem appeared. If the length of message is package length, the communication would become silent. Other circumstances, the communication is ok. You could help me?
- Thu Aug 30, 2018 2:23 am
- Forum: Questions & Answers
- Topic: How to get the verify value 'v' in ECDSA
- Replies: 1
- Views: 4694
Re: How to get the verify value 'v' in ECDSA
I think you should re-implement your ECDSA api.
- Tue Aug 14, 2018 4:16 am
- Forum: Questions & Answers
- Topic: T0 Parsing
- Replies: 9
- Views: 17766
Re: T0 Parsing
I expect learn more~
For example, T1 and contactless and so on.
For example, T1 and contactless and so on.
- Tue Aug 14, 2018 4:11 am
- Forum: Questions & Answers
- Topic: Dose there have windows standalone logon selotion
- Replies: 2
- Views: 5911
Re: Dose there have windows standalone logon selotion
It looks like a fido device.
Do you mean that when you connect the smartcard, the windows exchange data with smartcard, then you needn't input password ?
Do you mean that when you connect the smartcard, the windows exchange data with smartcard, then you needn't input password ?
- Sun Jul 15, 2018 11:49 pm
- Forum: Questions & Answers
- Topic: How to set EC parameters of Keypair
- Replies: 5
- Views: 9610
Re: How to set EC parameters of Keypair
It works! Thank you very much~