/*
* Cryptographic API for algorithms (i.e., low-level API).
*
* Copyright (c) 2006 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/algapi.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/fips.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/rtnetlink.h>
#include <linux/slab.h>
#include <linux/string.h>
#include "internal.h"
static LIST_HEAD(crypto_template_list);
static inline int crypto_set_driver_name(struct crypto_alg *alg)
{
static const char suffix[] = "-generic";
char *driver_name = alg->cra_driver_name;
int len;
if (*driver_name)
return 0;
len = strlcpy(driver_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
if (len + sizeof(suffix) > CRYPTO_MAX_ALG_NAME)
return -ENAMETOOLONG;
memcpy(driver_name + len, suffix, sizeof(suffix));
return 0;
}
static inline void crypto_check_module_sig(struct module *mod)
{
if (fips_enabled && mod && !module_sig_ok(mod))
panic("Module %s signature verification failed in FIPS mode\n",
module_name(mod));
}
static int crypto_check_alg(struct crypto_alg *alg)
{
crypto_check_module_sig(alg->cra_module);
if (alg->cra_alignmask & (alg->cra_alignmask + 1))
return -EINVAL;
/* General maximums for all algs. */
if (alg->cra_alignmask > MAX_ALGAPI_ALIGNMASK)
return -EINVAL;
if (alg->cra_blocksize > MAX_ALGAPI_BLOCKSIZE)
return -EINVAL;
/* Lower maximums for specific alg types. */
if (!alg->cra_type && (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
CRYPTO_ALG_TYPE_CIPHER) {
if (alg->cra_alignmask > MAX_CIPHER_ALIGNMASK)
return -EINVAL;
if (alg->cra_blocksize > MAX_CIPHER_BLOCKSIZE)
return -EINVAL;
}
if (alg->cra_priority < 0)
return