Re: [PATCH v5 06/11] crypto: qce: skcipher: Return error for non-blocksize data(ECB/CBC algorithms)

[Eric Biggers]

On Thu, Feb 04, 2021 at 04:43:54PM -0500, Thara Gopinath wrote:
> +	/*
> +	 * ECB and CBC algorithms require message lengths to be
> +	 * multiples of block size.
> +	 * TODO: The spec says AES CBC mode for certain versions
> +	 * of crypto engine can handle partial blocks as well.
> +	 * Test and enable such messages.
> +	 */
> +	if (IS_ECB(rctx->flags) || IS_CBC(rctx->flags))
> +		if (!IS_ALIGNED(req->cryptlen, blocksize))
> +			return -EINVAL;

CBC by definition only operates on full blocks, so the TODO doesn't make sense.
Is the partial block support really CTS-CBC?

- Eric