linux-imx

/*

 * authencesn.c - AEAD wrapper for IPsec with extended sequence numbers,

 *                 derived from authenc.c

 *

 * Copyright (C) 2010 secunet Security Networks AG

 * Copyright (C) 2010 Steffen Klassert <steffen.klassert@secunet.com>

 * Copyright (c) 2015 Herbert Xu <herbert@gondor.apana.org.au>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License as published by the Free

 * Software Foundation; either version 2 of the License, or (at your option)

 * any later version.

 *

 */

​

#include <crypto/internal/aead.h>

#include <crypto/internal/hash.h>

#include <crypto/internal/skcipher.h>

#include <crypto/authenc.h>

#include <crypto/null.h>

#include <crypto/scatterwalk.h>

#include <linux/err.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/rtnetlink.h>

#include <linux/slab.h>

#include <linux/spinlock.h>

​

struct authenc_esn_instance_ctx {

    struct crypto_ahash_spawn auth;

    struct crypto_skcipher_spawn enc;

};

​

struct crypto_authenc_esn_ctx {

    unsigned int reqoff;

    struct crypto_ahash *auth;

    struct crypto_skcipher *enc;

    struct crypto_sync_skcipher *null;

};

​

struct authenc_esn_request_ctx {

    struct scatterlist src[2];

    struct scatterlist dst[2];

    char tail[];

};

​

static void authenc_esn_request_complete(struct aead_request *req, int err)

{

    if (err != -EINPROGRESS)

        aead_request_complete(req, err);

}

​

static int crypto_authenc_esn_setauthsize(struct crypto_aead *authenc_esn,

                      unsigned int authsize)

{

    if (authsize > 0 && authsize < 4)

        return -EINVAL;

​

    return 0;

}

​

static int crypto_authenc_esn_setkey(struct crypto_aead *authenc_esn, const u8 *key,