SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
AES feedback mode block buffers the feedback parameters and controls the various feedback modes. For more information about the ECB, CBC, CTR, and CFB modes of operation, see the NIST-SP800-38A specification.
CTR implements the standard incrementing function, as described in the NIST-SP800-38A specification, with m set to 16 or a multiple of 32.
AES-XTS mode requires a polynomial multiplication for initialization vector (IV) generation of the AES operation. This multiplication can be simplified when the first result is available due to the definition and use of the block number within a unit. The input for the polynomial multiplication is not directly j, but αj, where α = x2 in the GF (2128) domain.
In addition, F8 encryption or decryption mode, F9, and (X)CBC-MAC authentication modes are available.