/* SPDX-License-Identifier: GPL-2.0-or-later *//* * Hash algorithms. *  * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au> */ #ifndef _CRYPTO_INTERNAL_HASH_H#define _CRYPTO_INTERNAL_HASH_H #include <crypto/algapi.h>#include <crypto/hash.h> /* Set this bit to handle partial blocks in the API. */#define CRYPTO_AHASH_ALG_BLOCK_ONLY	0x01000000 /* Set this bit if final requires at least one byte. */#define CRYPTO_AHASH_ALG_FINAL_NONZERO	0x02000000 /* Set this bit if finup can deal with multiple blocks. */#define CRYPTO_AHASH_ALG_FINUP_MAX	0x04000000 /* This bit is set by the Crypto API if export_core is not supported. */#define CRYPTO_AHASH_ALG_NO_EXPORT_CORE	0x08000000 #define HASH_FBREQ_ON_STACK(name, req) \        char __##name##_req[sizeof(struct ahash_request) + \                            MAX_SYNC_HASH_REQSIZE] CRYPTO_MINALIGN_ATTR; \        struct ahash_request *name = ahash_fbreq_on_stack_init( \                __##name##_req, (req)) struct ahash_request;struct scatterlist; struct crypto_hash_walk {	const char *data; 	unsigned int offset;	unsigned int flags; 	struct page *pg;	unsigned int entrylen; 	unsigned int total;	struct scatterlist *sg;}; struct ahash_instance {	void (*free)(struct ahash_instance *inst);	union {		struct {			char head[offsetof(struct ahash_alg, halg.base)];			struct crypto_instance base;		} s;		struct ahash_alg alg;	};}; struct shash_instance {	void (*free)(struct shash_instance *inst);	union {		struct {			char head[offsetof(struct shash_alg, base)];			struct crypto_instance base;		} s;		struct shash_alg alg;	};}; struct crypto_ahash_spawn {	struct crypto_spawn base;}; struct crypto_shash_spawn {	struct crypto_spawn base;}; int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);int crypto_hash_walk_first(struct ahash_request *req,			   struct crypto_hash_walk *walk); static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk){	return !(walk->entrylen | walk->total);} int crypto_register_ahash(struct ahash_alg *alg);void crypto_unregister_ahash(struct ahash_alg *alg);int crypto_register_ahashes(struct ahash_alg *algs, int count);void crypto_unregister_ahashes(struct ahash_alg *algs, int count);int ahash_register_instance(struct crypto_template *tmpl,			    struct ahash_instance *inst);void ahash_free_singlespawn_instance(struct ahash_instance *inst); int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,		    unsigned int keylen); static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg){	return alg->setkey != shash_no_setkey;} bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg); static inline bool crypto_shash_alg_needs_key(struct shash_alg *alg){	return crypto_shash_alg_has_setkey(alg) &&		!(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY);} static inline bool crypto_hash_alg_needs_key(struct hash_alg_common *alg){	return crypto_hash_alg_has_setkey(alg) &&		!(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY);} static inline bool crypto_hash_no_export_core(struct crypto_ahash *tfm){	return crypto_hash_alg_common(tfm)->base.cra_flags &	       CRYPTO_AHASH_ALG_NO_EXPORT_CORE;} int crypto_grab_ahash(struct crypto_ahash_spawn *spawn,		      struct crypto_instance *inst,		      const char *name, u32 type, u32 mask); static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn){	crypto_drop_spawn(&spawn->base);} static inline struct hash_alg_common *crypto_spawn_ahash_alg(	struct crypto_ahash_spawn *spawn){	return __crypto_hash_alg_common(spawn->base.alg);} int crypto_register_shash(struct shash_alg *alg);void crypto_unregister_shash(struct shash_alg *alg);int crypto_register_shashes(struct shash_alg *algs, int count);void crypto_unregister_shashes(struct shash_alg *algs, int count);int shash_register_instance(struct crypto_template *tmpl,			    struct shash_instance *inst);void shash_free_singlespawn_instance(struct shash_instance *inst); int crypto_grab_shash(struct crypto_shash_spawn *spawn,		      struct crypto_instance *inst,		      const char *name, u32 type, u32 mask); static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn){	crypto_drop_spawn(&spawn->base);} static inline struct shash_alg *crypto_spawn_shash_alg(	struct crypto_shash_spawn *spawn){	return __crypto_shash_alg(spawn->base.alg);} int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc); static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm){	return crypto_tfm_ctx(crypto_ahash_tfm(tfm));} static inline void *crypto_ahash_ctx_dma(struct crypto_ahash *tfm){	return crypto_tfm_ctx_dma(crypto_ahash_tfm(tfm));} static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg){	return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,			    halg);} static inline struct ahash_alg *crypto_ahash_alg(struct crypto_ahash *hash){	return container_of(crypto_hash_alg_common(hash), struct ahash_alg,			    halg);} static inline void crypto_ahash_set_statesize(struct crypto_ahash *tfm,					      unsigned int size){	tfm->statesize = size;} static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,					    unsigned int reqsize){	tfm->reqsize = reqsize;} static inline bool crypto_ahash_tested(struct crypto_ahash *tfm){	struct crypto_tfm *tfm_base = crypto_ahash_tfm(tfm); 	return tfm_base->__crt_alg->cra_flags & CRYPTO_ALG_TESTED;} static inline void crypto_ahash_set_reqsize_dma(struct crypto_ahash *ahash,						unsigned int reqsize){	reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1);	ahash->reqsize = reqsize;} static inline struct crypto_instance *ahash_crypto_instance(	struct ahash_instance *inst){	return &inst->s.base;} static inline struct ahash_instance *ahash_instance(	struct crypto_instance *inst){	return container_of(inst, struct ahash_instance, s.base);} static inline struct ahash_instance *ahash_alg_instance(	struct crypto_ahash *ahash){	return ahash_instance(crypto_tfm_alg_instance(&ahash->base));} static inline void *ahash_instance_ctx(struct ahash_instance *inst){	return crypto_instance_ctx(ahash_crypto_instance(inst));} static inline void *ahash_request_ctx_dma(struct ahash_request *req){	unsigned int align = crypto_dma_align(); 	if (align <= crypto_tfm_ctx_alignment())		align = 1; 	return PTR_ALIGN(ahash_request_ctx(req), align);} static inline void ahash_request_complete(struct ahash_request *req, int err){	crypto_request_complete(&req->base, err);} static inline u32 ahash_request_flags(struct ahash_request *req){	return crypto_request_flags(&req->base) & ~CRYPTO_AHASH_REQ_PRIVATE;} static inline struct crypto_ahash *crypto_spawn_ahash(	struct crypto_ahash_spawn *spawn){	return crypto_spawn_tfm2(&spawn->base);} static inline int ahash_enqueue_request(struct crypto_queue *queue,					     struct ahash_request *request){	return crypto_enqueue_request(queue, &request->base);} static inline struct ahash_request *ahash_dequeue_request(	struct crypto_queue *queue){	return ahash_request_cast(crypto_dequeue_request(queue));} static inline void *crypto_shash_ctx(struct crypto_shash *tfm){	return crypto_tfm_ctx(&tfm->base);} static inline struct crypto_instance *shash_crypto_instance(	struct shash_instance *inst){	return &inst->s.base;} static inline struct shash_instance *shash_instance(	struct crypto_instance *inst){	return container_of(inst, struct shash_instance, s.base);} static inline struct shash_instance *shash_alg_instance(	struct crypto_shash *shash){	return shash_instance(crypto_tfm_alg_instance(&shash->base));} static inline void *shash_instance_ctx(struct shash_instance *inst){	return crypto_instance_ctx(shash_crypto_instance(inst));} static inline struct crypto_shash *crypto_spawn_shash(	struct crypto_shash_spawn *spawn){	return crypto_spawn_tfm2(&spawn->base);} static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm){	return container_of(tfm, struct crypto_shash, base);} static inline bool ahash_request_isvirt(struct ahash_request *req){	return req->base.flags & CRYPTO_AHASH_REQ_VIRT;} static inline bool crypto_ahash_req_virt(struct crypto_ahash *tfm){	return crypto_tfm_req_virt(&tfm->base);} static inline struct crypto_ahash *crypto_ahash_fb(struct crypto_ahash *tfm){	return __crypto_ahash_cast(crypto_ahash_tfm(tfm)->fb);} static inline struct ahash_request *ahash_fbreq_on_stack_init(	char *buf, struct ahash_request *old){	struct crypto_ahash *tfm = crypto_ahash_reqtfm(old);	struct ahash_request *req = (void *)buf; 	crypto_stack_request_init(&req->base,				  crypto_ahash_tfm(crypto_ahash_fb(tfm)));	ahash_request_set_callback(req, ahash_request_flags(old), NULL, NULL);	req->base.flags &= ~CRYPTO_AHASH_REQ_PRIVATE;	req->base.flags |= old->base.flags & CRYPTO_AHASH_REQ_PRIVATE;	req->src = old->src;	req->result = old->result;	req->nbytes = old->nbytes; 	return req;} /* Return the state size without partial block for block-only algorithms. */static inline unsigned int crypto_shash_coresize(struct crypto_shash *tfm){	return crypto_shash_statesize(tfm) - crypto_shash_blocksize(tfm) - 1;} /* This can only be used if the request was never cloned. */#define HASH_REQUEST_ZERO(name) \	memzero_explicit(__##name##_req, sizeof(__##name##_req)) /** * crypto_ahash_export_core() - extract core state for message digest * @req: reference to the ahash_request handle whose state is exported * @out: output buffer of sufficient size that can hold the hash state * * Export the hash state without the partial block buffer. * * Context: Softirq or process context. * Return: 0 if the export creation was successful; < 0 if an error occurred */int crypto_ahash_export_core(struct ahash_request *req, void *out); /** * crypto_ahash_import_core() - import core state * @req: reference to ahash_request handle the state is imported into * @in: buffer holding the state * * Import the hash state without the partial block buffer. * * Context: Softirq or process context. * Return: 0 if the import was successful; < 0 if an error occurred */int crypto_ahash_import_core(struct ahash_request *req, const void *in); /** * crypto_shash_export_core() - extract core state for message digest * @desc: reference to the operational state handle whose state is exported * @out: output buffer of sufficient size that can hold the hash state * * Export the hash state without the partial block buffer. * * Context: Softirq or process context. * Return: 0 if the export creation was successful; < 0 if an error occurred */int crypto_shash_export_core(struct shash_desc *desc, void *out); /** * crypto_shash_import_core() - import core state * @desc: reference to the operational state handle the state imported into * @in: buffer holding the state * * Import the hash state without the partial block buffer. * * Context: Softirq or process context. * Return: 0 if the import was successful; < 0 if an error occurred */int crypto_shash_import_core(struct shash_desc *desc, const void *in); #endif	/* _CRYPTO_INTERNAL_HASH_H */