cancel
Showing results for 
Search instead for 
Did you mean: 

STM32 X-CUBE-Cryptolib - IV length and padding

AGhez
Associate III

Hi everyone,

I am trying to use the X-Cube-Cryptolib library to decrypt an array encrypted by an external application.

The original data has been encrypted with the AES-GCM 128 using a key of 16 bytes and an IV of 1 byte.

Now, I am getting an error where trying to set the IV to a length other than 12 byte.

Can you confirm that the method "cmox_cipher_setIV" only accept an IV of 12 byte? It is strange that the method documentation does not contain such info..

I tried with an other library that perform a GHASH padding of the IV and it can decrypt my input data.
Is there any similar implementation of a standard compliant method to perform an IV padding to be used with the ST library?

Thanks,

regards

Arianna

 

0 REPLIES 0