JavaCard OS

Posted: **Sat Nov 21, 2015 6:04 am**

I'm a beginner of javacard, and study this applet. I want to sign a data, but no matte what I send the APDU command, it always returns 0x6985, this is why?

And I already send verify command before signature .

It throws Exception in here:

Code: Select all

if (!sig_key.getPrivate().isInitialized())
         ISOException.throwIt(SW_CONDITIONS_NOT_SATISFIED);

Posted: **Mon Nov 23, 2015 2:10 pm**

You have done a verify but have you created the RSA keys (public/private) for the 3 functions (being sign/encrypt/authenticate)?
What the error is, it's telling you no key is there.

Posted: **Tue Nov 24, 2015 4:32 am**

Please look the code of the key initialization, the function genKeyPair() shall be called before the key used.

Posted: **Fri Nov 27, 2015 5:48 am**

You can refer to this topic.

Posted: **Sun Nov 29, 2015 11:47 pm**

Ellisun wrote:You can refer to this topic.

Thanks, it very helpful to me

JavaCard OS

How to compute the digital signature in this Applet?

How to compute the digital signature in this Applet?

Re: How to compute the digital signature in this Applet?

Re: How to compute the digital signature in this Applet?

Re: How to compute the digital signature in this Applet?

Re: How to compute the digital signature in this Applet?