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 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, 69 u32 mask); 70 void *crypto_create_tfm(struct crypto_alg *alg, 71 const struct crypto_type *frontend); 72 struct crypto_alg *crypto_find_alg(const char *alg_name, 73 const struct crypto_type *frontend, 74 u32 type, u32 mask); 75 void *crypto_alloc_tfm(const char *alg_name, 76 const struct crypto_type *frontend, u32 type, u32 mask); 77 78 int crypto_probing_notify(unsigned long val, void *v); 79 80 unsigned int crypto_alg_extsize(struct crypto_alg *alg); 81 82 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend, 83 u32 type, u32 mask); 84 85 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg) 86 { 87 refcount_inc(&alg->cra_refcnt); 88 return alg; 89 } 90 91 static inline void crypto_alg_put(struct crypto_alg *alg) 92 { 93 if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) 94 alg->cra_destroy(alg); 95 } 96 97 static inline int crypto_tmpl_get(struct crypto_template *tmpl) 98 { 99 return try_module_get(tmpl->module); 100 } 101 102 static inline void crypto_tmpl_put(struct crypto_template *tmpl) 103 { 104 module_put(tmpl->module); 105 } 106 107 static inline int crypto_is_larval(struct crypto_alg *alg) 108 { 109 return alg->cra_flags & CRYPTO_ALG_LARVAL; 110 } 111 112 static inline int crypto_is_dead(struct crypto_alg *alg) 113 { 114 return alg->cra_flags & CRYPTO_ALG_DEAD; 115 } 116 117 static inline int crypto_is_moribund(struct crypto_alg *alg) 118 { 119 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 120 } 121 122 static inline void crypto_notify(unsigned long val, void *v) 123 { 124 blocking_notifier_call_chain(&crypto_chain, val, v); 125 } 126 127 #endif /* _CRYPTO_INTERNAL_H */ 128 129