mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Herbert Xu](/assets/img/avatar_default.png)
We currently allocate temporary memory that is used for testing statically. This renders the testing engine non-reentrant. As algorithms may nest, i.e., one may construct another in order to carry out a part of its operation, this is unacceptable. For example, it has been reported that an AEAD implementation allocates a cipher in its setkey function, which causes it to fail during testing as the temporary memory is overwritten. This patch replaces the static memory with dynamically allocated buffers. We need a maximum of 16 pages so this slightly increases the chances of an algorithm failing due to memory shortage. However, as testing usually occurs at registration, this shouldn't be a big problem. Reported-by: Shasi Pulijala <spulijala@amcc.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
161 lines
4.3 KiB
C
161 lines
4.3 KiB
C
/*
|
|
* Cryptographic API.
|
|
*
|
|
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
|
|
* Copyright (c) 2005 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.
|
|
*
|
|
*/
|
|
#ifndef _CRYPTO_INTERNAL_H
|
|
#define _CRYPTO_INTERNAL_H
|
|
|
|
#include <crypto/algapi.h>
|
|
#include <linux/completion.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/highmem.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/init.h>
|
|
#include <linux/list.h>
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/rwsem.h>
|
|
#include <linux/slab.h>
|
|
|
|
#ifdef CONFIG_CRYPTO_FIPS
|
|
extern int fips_enabled;
|
|
#else
|
|
#define fips_enabled 0
|
|
#endif
|
|
|
|
/* Crypto notification events. */
|
|
enum {
|
|
CRYPTO_MSG_ALG_REQUEST,
|
|
CRYPTO_MSG_ALG_REGISTER,
|
|
CRYPTO_MSG_ALG_UNREGISTER,
|
|
CRYPTO_MSG_TMPL_REGISTER,
|
|
CRYPTO_MSG_TMPL_UNREGISTER,
|
|
};
|
|
|
|
struct crypto_instance;
|
|
struct crypto_template;
|
|
|
|
struct crypto_larval {
|
|
struct crypto_alg alg;
|
|
struct crypto_alg *adult;
|
|
struct completion completion;
|
|
u32 mask;
|
|
};
|
|
|
|
extern struct list_head crypto_alg_list;
|
|
extern struct rw_semaphore crypto_alg_sem;
|
|
extern struct blocking_notifier_head crypto_chain;
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
void __init crypto_init_proc(void);
|
|
void __exit crypto_exit_proc(void);
|
|
#else
|
|
static inline void crypto_init_proc(void)
|
|
{ }
|
|
static inline void crypto_exit_proc(void)
|
|
{ }
|
|
#endif
|
|
|
|
static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg)
|
|
{
|
|
unsigned int len = alg->cra_ctxsize;
|
|
|
|
if (alg->cra_alignmask) {
|
|
len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
|
|
len += alg->cra_digest.dia_digestsize;
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
|
|
{
|
|
return alg->cra_ctxsize;
|
|
}
|
|
|
|
static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
|
|
{
|
|
return alg->cra_ctxsize;
|
|
}
|
|
|
|
struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
|
|
struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
|
|
struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
|
|
|
|
int crypto_init_digest_ops(struct crypto_tfm *tfm);
|
|
int crypto_init_digest_ops_async(struct crypto_tfm *tfm);
|
|
int crypto_init_cipher_ops(struct crypto_tfm *tfm);
|
|
int crypto_init_compress_ops(struct crypto_tfm *tfm);
|
|
|
|
void crypto_exit_digest_ops(struct crypto_tfm *tfm);
|
|
void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
|
|
void crypto_exit_compress_ops(struct crypto_tfm *tfm);
|
|
|
|
struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
|
|
void crypto_larval_kill(struct crypto_alg *alg);
|
|
struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
|
|
void crypto_larval_error(const char *name, u32 type, u32 mask);
|
|
void crypto_alg_tested(const char *name, int err);
|
|
|
|
void crypto_shoot_alg(struct crypto_alg *alg);
|
|
struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
|
|
u32 mask);
|
|
void *crypto_create_tfm(struct crypto_alg *alg,
|
|
const struct crypto_type *frontend);
|
|
void *crypto_alloc_tfm(const char *alg_name,
|
|
const struct crypto_type *frontend, u32 type, u32 mask);
|
|
|
|
int crypto_register_instance(struct crypto_template *tmpl,
|
|
struct crypto_instance *inst);
|
|
|
|
int crypto_register_notifier(struct notifier_block *nb);
|
|
int crypto_unregister_notifier(struct notifier_block *nb);
|
|
int crypto_probing_notify(unsigned long val, void *v);
|
|
|
|
static inline void crypto_alg_put(struct crypto_alg *alg)
|
|
{
|
|
if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
|
|
alg->cra_destroy(alg);
|
|
}
|
|
|
|
static inline int crypto_tmpl_get(struct crypto_template *tmpl)
|
|
{
|
|
return try_module_get(tmpl->module);
|
|
}
|
|
|
|
static inline void crypto_tmpl_put(struct crypto_template *tmpl)
|
|
{
|
|
module_put(tmpl->module);
|
|
}
|
|
|
|
static inline int crypto_is_larval(struct crypto_alg *alg)
|
|
{
|
|
return alg->cra_flags & CRYPTO_ALG_LARVAL;
|
|
}
|
|
|
|
static inline int crypto_is_dead(struct crypto_alg *alg)
|
|
{
|
|
return alg->cra_flags & CRYPTO_ALG_DEAD;
|
|
}
|
|
|
|
static inline int crypto_is_moribund(struct crypto_alg *alg)
|
|
{
|
|
return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
|
|
}
|
|
|
|
static inline void crypto_notify(unsigned long val, void *v)
|
|
{
|
|
blocking_notifier_call_chain(&crypto_chain, val, v);
|
|
}
|
|
|
|
#endif /* _CRYPTO_INTERNAL_H */
|
|
|