Our Online Store have the new products: RFID antenna board. Currently it can work with JC10M24R and JCOP4 card chips.
Compared with normal cards, the antenna board module has a smaller size and fixed holes, which is easy to integrate in the IOT(Internet Of Things) project.

how to judge that the class byte of APDU command is valid?

JavaCard Applet Development Related Questions and Answers.
later123654
Posts: 11
Joined: Tue May 22, 2018 9:43 pm
Points :130
Contact:

how to judge that the class byte of APDU command is valid?

Post by later123654 » Fri Jun 15, 2018 4:46 am

how to judge that the class byte of APDU command is valid? I want to know the answer, please tell me and thanks!

hanjing
Posts: 2
Joined: Wed Aug 31, 2016 9:58 pm
Points :42
Contact:

Re: how to judge that the class byte of APDU command is valid?

Post by hanjing » Fri Jun 15, 2018 4:56 am

Please refer to JavaCard222JCREspec 4.5.1 and hope to help you.

wumindejia
Posts: 55
Joined: Thu Sep 22, 2016 5:05 am
Points :784
Contact:

Re: how to judge that the class byte of APDU command is valid?

Post by wumindejia » Fri Jun 15, 2018 4:57 am

According to specific specifications,Ins is generally 0x00,0x04,0x80,0x84.

gyylxz
Posts: 3
Joined: Fri Jun 15, 2018 4:59 am
Points :22
Contact:

Re: how to judge that the class byte of APDU command is valid?

Post by gyylxz » Fri Jun 15, 2018 5:11 am

Filter by the following function:
int8_t apdu_is_valid_cla(void)
{
return (int8_t)((((g_apdu_info.cla) & 0xE0) != 0x20) && ((g_apdu_info.cla) != 0xFF));
}

gyylxz
Posts: 3
Joined: Fri Jun 15, 2018 4:59 am
Points :22
Contact:

Re: how to judge that the class byte of APDU command is valid?

Post by gyylxz » Fri Jun 15, 2018 5:12 am

Filter by the following function:
int8_t apdu_is_valid_cla(void)
{
return (int8_t)((((g_apdu_info.cla) & 0xE0) != 0x20) && ((g_apdu_info.cla) != 0xFF));
}

Post Reply Previous topicNext topic

Who is online

Users browsing this forum: No registered users and 7 guests

JavaCard OS : Disclaimer