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JCaberham

You can implement AES-CMAC from scratch using the AES Cipher and Signature objects, and it's possible and not too difficult.

JCaberham

To handle the angle with decimals, try to use this formula
sin(a+b) =sina*cosb+cosa*sinb
cos(a+b) = cosa*cosb - sina*sinb

Take angle 45.5 as an example,

sin(45+0.5) = sina45*cos0.5 + cos45*sin0.5

But you may need to define 4 arrays sin[0~360], cos[0~360], sin[0.0~0.1],cos[0.0~0.1]

JCaberham

Try to google it by typing GSC-IS keywords.

JCaberham

You'd better carefully study the finished simple applet, e.g. wallet demo..

JCaberham

It seems that the keypair you set is invalid. You do not need to set the keys manually as

Code: Select all

keyPair.genKeyPair();

actually generates a valid keypair for you.

JCaberham

In my opinion, this doesn't have any problem. Because GIDS is defined based on windows framework, it's not strange that it cannot work with opensc. But I am not sure if my thought is correct.

JCaberham

You can have your applet masked into the ROM by a card manufacturer. This will remove the need for APDU's to install your applet. But you will still need to use APDU's for anything, including embedded applications on the device, to communicate with your applet. A Java Card applet is passive and does...

JCaberham

Your computation method has something wrong. You should notice that: the last block is DES3 encrypted, ICV is last calculated C_MAC

JCaberham

It's recommended to check JavaCard API document firstly.You will find the basic introduction about these. public static final byte ALG_EC_F2M: KeyPair object containing an EC key pair for EC operations over fields of characteristic 2 with polynomial basis. public static final byte ALG_EC_FP: KeyPair...

JCaberham

If you use bouncy castle, you can use a 16 byte 2TDEA key.

Search found 19 matches: re:

Re: Is there a good way to implement an AES-CMAC encryption on Java Cards?

Re: Sinus and Cosinus calculation in javacard?

Re: Issue about using CAC

Re: How to invoke a simple java card method?

Re: verify function cannot work

Re: Smart Card Gids Applet

Re: ROM applet

Re: Error when generating CMAC

Re: Elliptic Curve Cryptography

Re: 3DES Key

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