linux-imx

// SPDX-License-Identifier: GPL-2.0-or-later

/*

 * Authenc: Simple AEAD wrapper for IPsec

 *

 * Copyright (c) 2007-2015 Herbert Xu <herbert@gondor.apana.org.au>

 */

​

#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_instance_ctx {

    struct crypto_ahash_spawn auth;

    struct crypto_skcipher_spawn enc;

    unsigned int reqoff;

};

​

struct crypto_authenc_ctx {

    struct crypto_ahash *auth;

    struct crypto_skcipher *enc;

    struct crypto_sync_skcipher *null;

};

​

struct authenc_request_ctx {

    struct scatterlist src[2];

    struct scatterlist dst[2];

    char tail[];

};

​

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

{

    if (err != -EINPROGRESS)

        aead_request_complete(req, err);

}

​

int crypto_authenc_extractkeys(struct crypto_authenc_keys *keys, const u8 *key,

                   unsigned int keylen)

{

    struct rtattr *rta = (struct rtattr *)key;

    struct crypto_authenc_key_param *param;

​

    if (!RTA_OK(rta, keylen))

        return -EINVAL;

    if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM)

        return -EINVAL;

​

    /*

     * RTA_OK() didn't align the rtattr's payload when validating that it

     * fits in the buffer.  Yet, the keys should start on the next 4-byte

     * aligned boundary.  To avoid confusion, require that the rtattr

     * payload be exactly the param struct, which has a 4-byte aligned size.

     */

    if (RTA_PAYLOAD(rta) != sizeof(*param))