/* 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 <crypto/utils.h>#include <linux/align.h>#include <linux/cache.h>#include <linux/crypto.h>#include <linux/types.h>#include <linux/workqueue.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		127#define MAX_CIPHER_BLOCKSIZE		16#define MAX_CIPHER_ALIGNMASK		15 #ifdef ARCH_DMA_MINALIGN#define CRYPTO_DMA_ALIGN ARCH_DMA_MINALIGN#else#define CRYPTO_DMA_ALIGN CRYPTO_MINALIGN#endif #define CRYPTO_DMA_PADDING ((CRYPTO_DMA_ALIGN - 1) & ~(CRYPTO_MINALIGN - 1)) /* * Autoloaded crypto modules should only use a prefixed name to avoid allowing * arbitrary modules to be loaded. Loading from userspace may still need the * unprefixed names, so retains those aliases as well. * This uses __MODULE_INFO directly instead of MODULE_ALIAS because pre-4.3 * gcc (e.g. avr32 toolchain) uses __LINE__ for uniqueness, and this macro * expands twice on the same line. Instead, use a separate base name for the * alias. */#define MODULE_ALIAS_CRYPTO(name)	\		__MODULE_INFO(alias, alias_userspace, name);	\		__MODULE_INFO(alias, alias_crypto, "crypto-" name) struct crypto_aead;struct crypto_instance;struct module;struct notifier_block;struct rtattr;struct scatterlist;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_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);#ifdef CONFIG_CRYPTO_STATS	int (*report_stat)(struct sk_buff *skb, struct crypto_alg *alg);#endif 	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;	}; 	struct work_struct free_work; 	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;}; /* * Algorithm registration interface. */int crypto_register_alg(struct crypto_alg *alg);void crypto_unregister_alg(struct crypto_alg *alg);int crypto_register_algs(struct crypto_alg *algs, int count);void crypto_unregister_algs(struct crypto_alg *algs, int count); 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); static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm){	return tfm->__crt_ctx;} static inline void *crypto_tfm_ctx_align(struct crypto_tfm *tfm,					 unsigned int align){	if (align <= crypto_tfm_ctx_alignment())		align = 1; 	return PTR_ALIGN(crypto_tfm_ctx(tfm), align);} static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm){	return crypto_tfm_ctx_align(tfm, crypto_tfm_alg_alignmask(tfm) + 1);} static inline unsigned int crypto_dma_align(void){	return CRYPTO_DMA_ALIGN;} static inline unsigned int crypto_dma_padding(void){	return (crypto_dma_align() - 1) & ~(crypto_tfm_ctx_alignment() - 1);} static inline void *crypto_tfm_ctx_dma(struct crypto_tfm *tfm){	return crypto_tfm_ctx_align(tfm, crypto_dma_align());} 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);} 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,}; static inline void crypto_request_complete(struct crypto_async_request *req,					   int err){	req->complete(req->data, err);} static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm){	return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK;} #endif	/* _CRYPTO_ALGAPI_H */