1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Cryptographic API. 4 * 5 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> 6 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au> 7 */ 8 #ifndef _CRYPTO_INTERNAL_H 9 #define _CRYPTO_INTERNAL_H 10 11 #include <crypto/algapi.h> 12 #include <linux/completion.h> 13 #include <linux/mm.h> 14 #include <linux/highmem.h> 15 #include <linux/interrupt.h> 16 #include <linux/init.h> 17 #include <linux/list.h> 18 #include <linux/module.h> 19 #include <linux/kernel.h> 20 #include <linux/notifier.h> 21 #include <linux/rwsem.h> 22 #include <linux/slab.h> 23 24 struct crypto_instance; 25 struct crypto_template; 26 27 struct crypto_larval { 28 struct crypto_alg alg; 29 struct crypto_alg *adult; 30 struct completion completion; 31 u32 mask; 32 }; 33 34 extern struct list_head crypto_alg_list; 35 extern struct rw_semaphore crypto_alg_sem; 36 extern struct blocking_notifier_head crypto_chain; 37 38 #ifdef CONFIG_PROC_FS 39 void __init crypto_init_proc(void); 40 void __exit crypto_exit_proc(void); 41 #else 42 static inline void crypto_init_proc(void) 43 { } 44 static inline void crypto_exit_proc(void) 45 { } 46 #endif 47 48 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg) 49 { 50 return alg->cra_ctxsize; 51 } 52 53 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg) 54 { 55 return alg->cra_ctxsize; 56 } 57 58 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); 59 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); 60 61 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask); 62 void crypto_larval_kill(struct crypto_alg *alg); 63 void crypto_alg_tested(const char *name, int err); 64 65 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, 66 struct crypto_alg *nalg); 67 void crypto_remove_final(struct list_head *list); 68 void crypto_shoot_alg(struct crypto_alg *alg); 69 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, 70 u32 mask); 71 void *crypto_create_tfm(struct crypto_alg *alg, 72 const struct crypto_type *frontend); 73 struct crypto_alg *crypto_find_alg(const char *alg_name, 74 const struct crypto_type *frontend, 75 u32 type, u32 mask); 76 void *crypto_alloc_tfm(const char *alg_name, 77 const struct crypto_type *frontend, u32 type, u32 mask); 78 79 int crypto_probing_notify(unsigned long val, void *v); 80 81 unsigned int crypto_alg_extsize(struct crypto_alg *alg); 82 83 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend, 84 u32 type, u32 mask); 85 86 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg) 87 { 88 refcount_inc(&alg->cra_refcnt); 89 return alg; 90 } 91 92 static inline void crypto_alg_put(struct crypto_alg *alg) 93 { 94 if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) 95 alg->cra_destroy(alg); 96 } 97 98 static inline int crypto_tmpl_get(struct crypto_template *tmpl) 99 { 100 return try_module_get(tmpl->module); 101 } 102 103 static inline void crypto_tmpl_put(struct crypto_template *tmpl) 104 { 105 module_put(tmpl->module); 106 } 107 108 static inline int crypto_is_larval(struct crypto_alg *alg) 109 { 110 return alg->cra_flags & CRYPTO_ALG_LARVAL; 111 } 112 113 static inline int crypto_is_dead(struct crypto_alg *alg) 114 { 115 return alg->cra_flags & CRYPTO_ALG_DEAD; 116 } 117 118 static inline int crypto_is_moribund(struct crypto_alg *alg) 119 { 120 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 121 } 122 123 static inline void crypto_notify(unsigned long val, void *v) 124 { 125 blocking_notifier_call_chain(&crypto_chain, val, v); 126 } 127 128 #endif /* _CRYPTO_INTERNAL_H */ 129 130