(void*)PTR_ALIGN((u8*)skcipher_request_ctx(req),align+ 1);structskcipher_request*subreq= &rctx->subreq;u8 *iv = rctx->iv;/* set up counter block */memcpy(iv, ctx->nonce, CTR_RFC3686_NONCE_SIZE);memcpy(iv + CTR_RFC3686_NONCE_SIZE, req->iv, CTR_RFC3686_IV_SIZE);/* initiali...