linux-imx

/*

 * CTS: Cipher Text Stealing mode

 *

 * COPYRIGHT (c) 2008

 * The Regents of the University of Michigan

 * ALL RIGHTS RESERVED

 *

 * Permission is granted to use, copy, create derivative works

 * and redistribute this software and such derivative works

 * for any purpose, so long as the name of The University of

 * Michigan is not used in any advertising or publicity

 * pertaining to the use of distribution of this software

 * without specific, written prior authorization.  If the

 * above copyright notice or any other identification of the

 * University of Michigan is included in any copy of any

 * portion of this software, then the disclaimer below must

 * also be included.

 *

 * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION

 * FROM THE UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY

 * PURPOSE, AND WITHOUT WARRANTY BY THE UNIVERSITY OF

 * MICHIGAN OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING

 * WITHOUT LIMITATION THE IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE

 * REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE LIABLE

 * FOR ANY DAMAGES, INCLUDING SPECIAL, INDIRECT, INCIDENTAL, OR

 * CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM ARISING

 * OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN

 * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGES.

 */

​

/* Derived from various:

 *  Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>

 */

​

/*

 * This is the Cipher Text Stealing mode as described by

 * Section 8 of rfc2040 and referenced by rfc3962.

 * rfc3962 includes errata information in its Appendix A.

 */

​

#include <crypto/algapi.h>

#include <crypto/internal/skcipher.h>

#include <linux/err.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/log2.h>

#include <linux/module.h>

#include <linux/scatterlist.h>

#include <crypto/scatterwalk.h>

#include <linux/slab.h>

#include <linux/compiler.h>

​

struct crypto_cts_ctx {

    struct crypto_skcipher *child;

};

​

struct crypto_cts_reqctx {

    struct scatterlist sg[2];

    unsigned offset;

    struct skcipher_request subreq;

};