Can LL_Encrypt() encrypt "in place"?

Jim Seymour

Other Parts Discussed in Thread: CC2540

Is it safe to use the LL_Encrypt() function with the output buffer the same as the input buffer?

example:

LL_Encrypt( aesKey, tempBuffer, tempBuffer );

If it matters, this is on a CC2540.

And forgive me if this is an obvious question, but I've not been able to find the documentation for this function. All I've seen is the ll.h file and a couple of examples posted in these forums...

over 9 years ago

0 JXS over 9 years ago

TI__Guru** 105180 points

Hi,

No, they need to be different buffers. Also, I suggest using HCI_LE_EncryptCmd() since there is some byte swapping done in the encryption.

Best wishes

0 Jim Seymour over 9 years ago in reply to JXS

Intellectual 620 points

Thanks. I think I found the doc explaining HCI and it seems quite a bit more complex than simply using LL_Encrypt(). I'm not worried about the byte-swap issue, but are there other advantages to using HCI_LE_EncryptCmd()?

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Can LL_Encrypt() encrypt "in place"?