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* Cryptographic API.
* Copyright (c) 2002 James Morris <>
* Copyright (c) 2005 Herbert Xu <>
* 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/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>
#include <asm/kmap_types.h>
/* Crypto notification events. */
enum {
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;
static inline enum km_type crypto_kmap_type(int out)
enum km_type type;
if (in_softirq())
type = out * (KM_SOFTIRQ1 - KM_SOFTIRQ0) + KM_SOFTIRQ0;
type = out * (KM_USER1 - KM_USER0) + KM_USER0;
return type;
static inline void *crypto_kmap(struct page *page, int out)
return kmap_atomic(page, crypto_kmap_type(out));
static inline void crypto_kunmap(void *vaddr, int out)
kunmap_atomic(vaddr, crypto_kmap_type(out));
static inline void crypto_yield(u32 flags)
void __init crypto_init_proc(void);
void __exit crypto_exit_proc(void);
static inline void crypto_init_proc(void)
{ }
static inline void crypto_exit_proc(void)
{ }
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_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);
void crypto_larval_error(const char *name, u32 type, u32 mask);
void crypto_shoot_alg(struct crypto_alg *alg);
struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, 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);
static inline void crypto_alg_put(struct crypto_alg *alg)
if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
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)
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 int crypto_notify(unsigned long val, void *v)
return blocking_notifier_call_chain(&crypto_chain, val, v);
#endif /* _CRYPTO_INTERNAL_H */