topic Re: K81 LTC CBC Encryption Output not correct in Kinetis Microcontrollers

K81 LTC CBC Encryption Output not correct

saurabhsaxena — Wed, 12 Sep 2018 11:22:57 GMT

Hi,

I am working on K81POS Tower Board, I working on some cryptography examples using the fsl_ltc.c drivers available on the SDK.

I want to decrypt data of size 24,176 bytes, which I am doing using the api LTC_AES_DecryptCbc(), but I am facing a problem described below.

The driver allows a Data Size of 0xFF0 to be passed in multiple sessions to the core LTC Module which decrypts each block. After decryption of the first 0xFF0 bytes of my total 24,176 bytes the result appears to be corrupted each time.

Does any body has any Idea related to this problem.

Re: K81 LTC CBC Encryption Output not correct

Hui_Ma — Thu, 13 Sep 2018 05:45:45 GMT

Hi,

For the K81 product is related security, which related documents and applications need NDA.

So, NXP community as a public platform is not suitable to discuss K81 related technical questions.

I would recommend customer to submit a online support ticket for K81 related product/application technical support.

Please check here about how to submit a online support ticket.

Thank you for the understanding.

Have a great day,
Mike

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Re: K81 LTC CBC Encryption Output not correct

saurabhsaxena — Mon, 15 Oct 2018 11:55:11 GMT

Problem has been resolved by modification API LTC_AES_DecryptCbc() , As of now I am closing this thread.