linux-imx

/*

 * Synchronous Cryptographic Hash operations.

 *

 * Copyright (c) 2008 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/scatterwalk.h>

#include <crypto/internal/hash.h>

#include <linux/err.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/seq_file.h>

#include <linux/cryptouser.h>

#include <net/netlink.h>

#include <linux/compiler.h>

​

#include "internal.h"

​

static const struct crypto_type crypto_shash_type;

​

int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,

            unsigned int keylen)

{

    return -ENOSYS;

}

EXPORT_SYMBOL_GPL(shash_no_setkey);

​

static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key,

                  unsigned int keylen)

{

    struct shash_alg *shash = crypto_shash_alg(tfm);

    unsigned long alignmask = crypto_shash_alignmask(tfm);

    unsigned long absize;

    u8 *buffer, *alignbuffer;

    int err;

​

    absize = keylen + (alignmask & ~(crypto_tfm_ctx_alignment() - 1));

    buffer = kmalloc(absize, GFP_ATOMIC);

    if (!buffer)

        return -ENOMEM;

​

    alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);

    memcpy(alignbuffer, key, keylen);

    err = shash->setkey(tfm, alignbuffer, keylen);

    kzfree(buffer);

    return err;

}

​

static void shash_set_needkey(struct crypto_shash *tfm, struct shash_alg *alg)

{

    if (crypto_shash_alg_has_setkey(alg) &&

        !(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY))

        crypto_shash_set_flags(tfm, CRYPTO_TFM_NEED_KEY);

}

​

int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,