CC2640 AES-128 Encryption for less than 16 bytes

Anbumani Thangaraj

For data byte length between 1 to 15, AES_ECB_EncryptData () API is not encrypting the data. Is there any configuration available to enable encryption from single bytes?

I don't have any problem in encryption/decryption of data byte length from 16 to 255.

over 7 years ago

0 JXS over 7 years ago

TI__Guru** 105180 points

Hello,

To workaround this limitation, can you pad your text data to 16 bytes? Also, you can use the AES Crypto TI-RTOS driver as another option.

Best wishes

0 JXS over 7 years ago in reply to JXS

TI__Guru** 105180 points

Just to clarify the above, the AES_ECB_EncryptData implements a block cipher (ECB) and requires 16-byte block size input.

Best wishes

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CC2640 AES-128 Encryption for less than 16 bytes