signPreComputedHash on JC30M48CR

[llogar]

Hi

I am trying to do ECC signatures on pre computed data using the signPreComputedHash() function. The applet I am using is working just fine on A22CR, but the verification of the signature data I get from JC30M48CR card fails. I am using prime256v1 curve and SHA256 hash for EC parameters and hashing. If I do the hashing on-card using Signature.sign() function, then the applet produces valid/verifiable signature on both (A22CR and JC30M48CR) cards. It's only when I sign the pre generated hash value I get the signature (from JC30M48CR card) that fails verification (verification done by openssl on the PC). A22CR returns the correct signature. Has anybody succeeded in using signPreComputedHash() function on JC30M48CR card?

Regards
Luka

[tay00000]

Your post is simply too brief to allow a more detailed understanding of your problem. Please post your source code that is causing the problem so that we could help. Are there any Status Words that are not 0x9000 that are returned during the operation ?

[JavaCardOS]

Hi Luka,

Our technical supports are working on solving your problem.

Once there is any news, I will keep you updated.

BR

[JavaCardOS]

Hi Luka,

Our technical supports have confirmed that there is a bug in JC30M48CR card OS. And they have already fixed it and released the new OS just now.

If you need us to re-deliver the new JC30M48CR cards to you, please contact javacardos@gmail.com. They will help to re-send the new cards.

Sorry for any inconvenience caused.

Best regards

[llogar]

Hi,

Thank you for the prompt reply & fix. I've sent an email...

Kind regards
Luka