/* SPDX-License-Identifier: GPL-2.0-or-later *//* * Cryptographic API for algorithms (i.e., low-level API). * * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> */#ifndef _CRYPTO_ALGAPI_H#define _CRYPTO_ALGAPI_H #include <linux/crypto.h>#include <linux/list.h>#include <linux/kernel.h> /* * Maximum values for blocksize and alignmask, used to allocate * static buffers that are big enough for any combination of * algs and architectures. Ciphers have a lower maximum size. */#define MAX_ALGAPI_BLOCKSIZE 160#define MAX_ALGAPI_ALIGNMASK 63#define MAX_CIPHER_BLOCKSIZE 16#define MAX_CIPHER_ALIGNMASK 15 struct crypto_aead;struct crypto_instance;struct module;struct rtattr;struct seq_file;struct sk_buff; struct crypto_type { unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask); unsigned int (*extsize)(struct crypto_alg *alg); int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask); int (*init_tfm)(struct crypto_tfm *tfm); void (*show)(struct seq_file *m, struct crypto_alg *alg); int (*report)(struct sk_buff *skb, struct crypto_alg *alg); void (*free)(struct crypto_instance *inst); unsigned int type; unsigned int maskclear; unsigned int maskset; unsigned int tfmsize;}; struct crypto_instance { struct crypto_alg alg; struct crypto_template *tmpl; union { /* Node in list of instances after registration. */ struct hlist_node list; /* List of attached spawns before registration. */ struct crypto_spawn *spawns; }; void *__ctx[] CRYPTO_MINALIGN_ATTR;}; struct crypto_template { struct list_head list; struct hlist_head instances; struct module *module; int (*create)(struct crypto_template *tmpl, struct rtattr **tb); char name[CRYPTO_MAX_ALG_NAME];}; struct crypto_spawn { struct list_head list; struct crypto_alg *alg; union { /* Back pointer to instance after registration.*/ struct crypto_instance *inst; /* Spawn list pointer prior to registration. */ struct crypto_spawn *next; }; const struct crypto_type *frontend; u32 mask; bool dead; bool registered;}; struct crypto_queue { struct list_head list; struct list_head *backlog; unsigned int qlen; unsigned int max_qlen;}; struct scatter_walk { struct scatterlist *sg; unsigned int offset;}; struct crypto_attr_alg { char name[CRYPTO_MAX_ALG_NAME];}; struct crypto_attr_type { u32 type; u32 mask;}; void crypto_mod_put(struct crypto_alg *alg); int crypto_register_template(struct crypto_template *tmpl);int crypto_register_templates(struct crypto_template *tmpls, int count);void crypto_unregister_template(struct crypto_template *tmpl);void crypto_unregister_templates(struct crypto_template *tmpls, int count);struct crypto_template *crypto_lookup_template(const char *name); int crypto_register_instance(struct crypto_template *tmpl, struct crypto_instance *inst);void crypto_unregister_instance(struct crypto_instance *inst); int crypto_grab_spawn(struct crypto_spawn *spawn, struct crypto_instance *inst, const char *name, u32 type, u32 mask);void crypto_drop_spawn(struct crypto_spawn *spawn);struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, u32 mask);void *crypto_spawn_tfm2(struct crypto_spawn *spawn); struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);int crypto_check_attr_type(struct rtattr **tb, u32 type, u32 *mask_ret);const char *crypto_attr_alg_name(struct rtattr *rta);int crypto_inst_setname(struct crypto_instance *inst, const char *name, struct crypto_alg *alg); void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);int crypto_enqueue_request(struct crypto_queue *queue, struct crypto_async_request *request);void crypto_enqueue_request_head(struct crypto_queue *queue, struct crypto_async_request *request);struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);static inline unsigned int crypto_queue_len(struct crypto_queue *queue){ return queue->qlen;} void crypto_inc(u8 *a, unsigned int size);void __crypto_xor(u8 *dst, const u8 *src1, const u8 *src2, unsigned int size); static inline void crypto_xor(u8 *dst, const u8 *src, unsigned int size){ if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && __builtin_constant_p(size) && (size % sizeof(unsigned long)) == 0) { unsigned long *d = (unsigned long *)dst; unsigned long *s = (unsigned long *)src; while (size > 0) { *d++ ^= *s++; size -= sizeof(unsigned long); } } else { __crypto_xor(dst, dst, src, size); }} static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2, unsigned int size){ if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && __builtin_constant_p(size) && (size % sizeof(unsigned long)) == 0) { unsigned long *d = (unsigned long *)dst; unsigned long *s1 = (unsigned long *)src1; unsigned long *s2 = (unsigned long *)src2; while (size > 0) { *d++ = *s1++ ^ *s2++; size -= sizeof(unsigned long); } } else { __crypto_xor(dst, src1, src2, size); }} static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm){ return PTR_ALIGN(crypto_tfm_ctx(tfm), crypto_tfm_alg_alignmask(tfm) + 1);} static inline struct crypto_instance *crypto_tfm_alg_instance( struct crypto_tfm *tfm){ return container_of(tfm->__crt_alg, struct crypto_instance, alg);} static inline void *crypto_instance_ctx(struct crypto_instance *inst){ return inst->__ctx;} static inline struct crypto_async_request *crypto_get_backlog( struct crypto_queue *queue){ return queue->backlog == &queue->list ? NULL : container_of(queue->backlog, struct crypto_async_request, list);} static inline u32 crypto_requires_off(struct crypto_attr_type *algt, u32 off){ return (algt->type ^ off) & algt->mask & off;} /* * When an algorithm uses another algorithm (e.g., if it's an instance of a * template), these are the flags that should always be set on the "outer" * algorithm if any "inner" algorithm has them set. */#define CRYPTO_ALG_INHERITED_FLAGS \ (CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK | \ CRYPTO_ALG_ALLOCATES_MEMORY) /* * Given the type and mask that specify the flags restrictions on a template * instance being created, return the mask that should be passed to * crypto_grab_*() (along with type=0) to honor any request the user made to * have any of the CRYPTO_ALG_INHERITED_FLAGS clear. */static inline u32 crypto_algt_inherited_mask(struct crypto_attr_type *algt){ return crypto_requires_off(algt, CRYPTO_ALG_INHERITED_FLAGS);} noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size); /** * crypto_memneq - Compare two areas of memory without leaking * timing information. * * @a: One area of memory * @b: Another area of memory * @size: The size of the area. * * Returns 0 when data is equal, 1 otherwise. */static inline int crypto_memneq(const void *a, const void *b, size_t size){ return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;} int crypto_register_notifier(struct notifier_block *nb);int crypto_unregister_notifier(struct notifier_block *nb); /* Crypto notification events. */enum { CRYPTO_MSG_ALG_REQUEST, CRYPTO_MSG_ALG_REGISTER, CRYPTO_MSG_ALG_LOADED,}; #endif /* _CRYPTO_ALGAPI_H */
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Cryptographic API for algorithms (i.e., low-level API).
*
* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
*/
#ifndef _CRYPTO_ALGAPI_H
#define _CRYPTO_ALGAPI_H
#include <linux/crypto.h>
#include <linux/list.h>
#include <linux/kernel.h>
/*
* Maximum values for blocksize and alignmask, used to allocate
* static buffers that are big enough for any combination of
* algs and architectures. Ciphers have a lower maximum size.
*/
#define MAX_ALGAPI_BLOCKSIZE 160
#define MAX_ALGAPI_ALIGNMASK 63
#define MAX_CIPHER_BLOCKSIZE 16
#define MAX_CIPHER_ALIGNMASK 15
struct crypto_aead;
struct crypto_instance;
struct module;
struct rtattr;
struct seq_file;
struct sk_buff;
struct crypto_type {
unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
unsigned int (*extsize)(struct crypto_alg *alg);
int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask);
int (*init_tfm)(struct crypto_tfm *tfm);
void (*show)(struct seq_file *m, struct crypto_alg *alg);
int (*report)(struct sk_buff *skb, struct crypto_alg *alg);
void (*free)(struct crypto_instance *inst);
unsigned int type;
unsigned int maskclear;
unsigned int maskset;
unsigned int tfmsize;
};
struct crypto_instance {
struct crypto_alg alg;
struct crypto_template *tmpl;
union {
/* Node in list of instances after registration. */
struct hlist_node list;
/* List of attached spawns before registration. */
struct crypto_spawn *spawns;
};
void *__ctx[] CRYPTO_MINALIGN_ATTR;
};
struct crypto_template {
struct list_head list;
struct hlist_head instances;
struct module *module;
int (*create)(struct crypto_template *tmpl, struct rtattr **tb);
char name[CRYPTO_MAX_ALG_NAME];
};
struct crypto_spawn {
struct list_head list;
struct crypto_alg *alg;
union {
/* Back pointer to instance after registration.*/
struct crypto_instance *inst;
/* Spawn list pointer prior to registration. */
struct crypto_spawn *next;
};
const struct crypto_type *frontend;
u32 mask;
bool dead;
bool registered;
};
struct crypto_queue {
struct list_head list;
struct list_head *backlog;
unsigned int qlen;
unsigned int max_qlen;
};
struct scatter_walk {
struct scatterlist *sg;
unsigned int offset;
};
struct crypto_attr_alg {
char name[CRYPTO_MAX_ALG_NAME];
};
struct crypto_attr_type {
u32 type;
u32 mask;
};
void crypto_mod_put(struct crypto_alg *alg);
int crypto_register_template(struct crypto_template *tmpl);
int crypto_register_templates(struct crypto_template *tmpls, int count);
void crypto_unregister_template(struct crypto_template *tmpl);
void crypto_unregister_templates(struct crypto_template *tmpls, int count);
struct crypto_template *crypto_lookup_template(const char *name);
int crypto_register_instance(struct crypto_template *tmpl,
struct crypto_instance *inst);
void crypto_unregister_instance(struct crypto_instance *inst);
int crypto_grab_spawn(struct crypto_spawn *spawn, struct crypto_instance *inst,
const char *name, u32 type, u32 mask);
void crypto_drop_spawn(struct crypto_spawn *spawn);
struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
u32 mask);
void *crypto_spawn_tfm2(struct crypto_spawn *spawn);
struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
int crypto_check_attr_type(struct rtattr **tb, u32 type, u32 *mask_ret);
const char *crypto_attr_alg_name(struct rtattr *rta);
int crypto_inst_setname(struct crypto_instance *inst, const char *name,
struct crypto_alg *alg);
void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
int crypto_enqueue_request(struct crypto_queue *queue,
struct crypto_async_request *request);
void crypto_enqueue_request_head(struct crypto_queue *queue,
struct crypto_async_request *request);
struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
static inline unsigned int crypto_queue_len(struct crypto_queue *queue)
{
return queue->qlen;
}
void crypto_inc(u8 *a, unsigned int size);
void __crypto_xor(u8 *dst, const u8 *src1, const u8 *src2, unsigned int size);
static inline void crypto_xor(u8 *dst, const u8 *src, unsigned int size)
{
if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
__builtin_constant_p(size) &&
(size % sizeof(unsigned long)) == 0) {
unsigned long *d = (unsigned long *)dst;
unsigned long *s = (unsigned long *)src;
while (size > 0) {
*d++ ^= *s++;
size -= sizeof(unsigned long);
}
} else {
__crypto_xor(dst, dst, src, size);
}
}
static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2,
unsigned int size)
{
if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
__builtin_constant_p(size) &&
(size % sizeof(unsigned long)) == 0) {
unsigned long *d = (unsigned long *)dst;
unsigned long *s1 = (unsigned long *)src1;
unsigned long *s2 = (unsigned long *)src2;
while (size > 0) {
*d++ = *s1++ ^ *s2++;
size -= sizeof(unsigned long);
}
} else {
__crypto_xor(dst, src1, src2, size);
}
}
static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
{
return PTR_ALIGN(crypto_tfm_ctx(tfm),
crypto_tfm_alg_alignmask(tfm) + 1);
}
static inline struct crypto_instance *crypto_tfm_alg_instance(
struct crypto_tfm *tfm)
{
return container_of(tfm->__crt_alg, struct crypto_instance, alg);
}
static inline void *crypto_instance_ctx(struct crypto_instance *inst)
{
return inst->__ctx;
}
static inline struct crypto_async_request *crypto_get_backlog(
struct crypto_queue *queue)
{
return queue->backlog == &queue->list ? NULL :
container_of(queue->backlog, struct crypto_async_request, list);
}
static inline u32 crypto_requires_off(struct crypto_attr_type *algt, u32 off)
{
return (algt->type ^ off) & algt->mask & off;
}
/*
* When an algorithm uses another algorithm (e.g., if it's an instance of a
* template), these are the flags that should always be set on the "outer"
* algorithm if any "inner" algorithm has them set.
*/
#define CRYPTO_ALG_INHERITED_FLAGS \
(CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK | \
CRYPTO_ALG_ALLOCATES_MEMORY)
/*
* Given the type and mask that specify the flags restrictions on a template
* instance being created, return the mask that should be passed to
* crypto_grab_*() (along with type=0) to honor any request the user made to
* have any of the CRYPTO_ALG_INHERITED_FLAGS clear.
*/
static inline u32 crypto_algt_inherited_mask(struct crypto_attr_type *algt)
{
return crypto_requires_off(algt, CRYPTO_ALG_INHERITED_FLAGS);
}
noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);
/**
* crypto_memneq - Compare two areas of memory without leaking
* timing information.
*
* @a: One area of memory
* @b: Another area of memory
* @size: The size of the area.
*
* Returns 0 when data is equal, 1 otherwise.
*/
static inline int crypto_memneq(const void *a, const void *b, size_t size)
{
return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
}
int crypto_register_notifier(struct notifier_block *nb);
int crypto_unregister_notifier(struct notifier_block *nb);
/* Crypto notification events. */
enum {
CRYPTO_MSG_ALG_REQUEST,
CRYPTO_MSG_ALG_REGISTER,
CRYPTO_MSG_ALG_LOADED,
};
#endif /* _CRYPTO_ALGAPI_H */