EK-TM4C129EXL: Wrong output Data Encryption

Sorry that you have not yet gotten a response. Your question is important, but I have not had a chance to build the application and try to reproduce your results. It is on my "todo" list.

Hello CCphi CCsora.
Since you are using TI's ROM_ based functionality, you may want to check the AESConfigSet function at the ROM User's Guide, and again the same function at the Peripheral Library User's guide. There is a difference and to my view the accurate version of this function is that of the Peripheral Library. The configuration of the length field of the CCM operations may cause the problem. In AES_CFG_CCM_L_x, the x goes from 1 to 8 in PL while in ROM Lib is only 2,4 or 8. Although source does not utilize that option it should be a default value in the register for this setting. If it is 2 and the default at the online sites is 1, then inconsistency seems to arise because you use 128-bit encryption where CCM parameter is needed and applies. (en.wikipedia.org/.../CCM_mode)
What I would do is to read the output of my module's AES encrypted content again into my module and decrypt it using the same source. If the result is O.K. then the module/web inconsistency is probably due to this CCM setting.

All the best,
John

Thank you cb1_mobile. I hope our friend CCphi CCsora will try it and I'll be waiting for the results.
John

Suspect that he'd surely fare better via, IARphi & IARsora. So many ARM MCUs - enforced limitation (trap) proves unwise!

Hi Bruno,

Possibly since the data and keys are given as bytes and the example program uses arrays of uint32_t on this LE device. Checking this out is on my "todo" list.

Hi, 

Thank you for all suggestions.  I will back to test in my office on next Tuesday(2/May) and let you know the result.  

BR,

CCphi