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/jump_label.h> 14 #include <linux/list.h> 15 #include <linux/module.h> 16 #include <linux/notifier.h> 17 #include <linux/numa.h> 18 #include <linux/refcount.h> 19 #include <linux/rwsem.h> 20 #include <linux/scatterlist.h> 21 #include <linux/sched.h> 22 #include <linux/types.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 bool test_started; 33 }; 34 35 struct crypto_type { 36 unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask); 37 unsigned int (*extsize)(struct crypto_alg *alg); 38 int (*init_tfm)(struct crypto_tfm *tfm); 39 void (*show)(struct seq_file *m, struct crypto_alg *alg); 40 int (*report)(struct sk_buff *skb, struct crypto_alg *alg); 41 void (*free)(struct crypto_instance *inst); 42 void (*destroy)(struct crypto_alg *alg); 43 44 unsigned int type; 45 unsigned int maskclear; 46 unsigned int maskset; 47 unsigned int tfmsize; 48 unsigned int algsize; 49 }; 50 51 enum { 52 CRYPTOA_UNSPEC, 53 CRYPTOA_ALG, 54 CRYPTOA_TYPE, 55 __CRYPTOA_MAX, 56 }; 57 58 #define CRYPTOA_MAX (__CRYPTOA_MAX - 1) 59 60 /* Maximum number of (rtattr) parameters for each template. */ 61 #define CRYPTO_MAX_ATTRS 32 62 63 extern struct rw_semaphore crypto_alg_sem; 64 extern struct list_head crypto_alg_list __guarded_by(&crypto_alg_sem); 65 extern struct blocking_notifier_head crypto_chain; 66 67 int alg_test(const char *driver, const char *alg, u32 type, u32 mask); 68 69 #if !IS_BUILTIN(CONFIG_CRYPTO_ALGAPI) || !IS_ENABLED(CONFIG_CRYPTO_SELFTESTS) 70 static inline bool crypto_boot_test_finished(void) 71 { 72 return true; 73 } 74 static inline void set_crypto_boot_test_finished(void) 75 { 76 } 77 #else 78 DECLARE_STATIC_KEY_FALSE(__crypto_boot_test_finished); 79 static inline bool crypto_boot_test_finished(void) 80 { 81 return static_branch_likely(&__crypto_boot_test_finished); 82 } 83 static inline void set_crypto_boot_test_finished(void) 84 { 85 static_branch_enable(&__crypto_boot_test_finished); 86 } 87 #endif /* !IS_BUILTIN(CONFIG_CRYPTO_ALGAPI) || 88 * !IS_ENABLED(CONFIG_CRYPTO_SELFTESTS) 89 */ 90 91 #ifdef CONFIG_PROC_FS 92 void __init crypto_init_proc(void); 93 void __exit crypto_exit_proc(void); 94 #else 95 static inline void crypto_init_proc(void) 96 { } 97 static inline void crypto_exit_proc(void) 98 { } 99 #endif 100 101 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg) 102 { 103 return alg->cra_ctxsize; 104 } 105 106 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg) 107 { 108 return alg->cra_ctxsize; 109 } 110 111 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); 112 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); 113 114 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask); 115 void crypto_schedule_test(struct crypto_larval *larval); 116 void crypto_alg_tested(const char *name, int err); 117 118 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, 119 struct crypto_alg *nalg); 120 void crypto_remove_final(struct list_head *list); 121 void crypto_shoot_alg(struct crypto_alg *alg); 122 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, 123 u32 mask); 124 void *crypto_create_tfm_node(struct crypto_alg *alg, 125 const struct crypto_type *frontend, int node); 126 127 static inline void *crypto_create_tfm(struct crypto_alg *alg, 128 const struct crypto_type *frontend) 129 { 130 return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE); 131 } 132 133 struct crypto_alg *crypto_find_alg(const char *alg_name, 134 const struct crypto_type *frontend, 135 u32 type, u32 mask); 136 137 void *crypto_alloc_tfm_node(const char *alg_name, 138 const struct crypto_type *frontend, u32 type, u32 mask, 139 int node); 140 141 static inline void *crypto_alloc_tfm(const char *alg_name, 142 const struct crypto_type *frontend, u32 type, u32 mask) 143 { 144 return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE); 145 } 146 147 int crypto_probing_notify(unsigned long val, void *v); 148 149 unsigned int crypto_alg_extsize(struct crypto_alg *alg); 150 151 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend, 152 u32 type, u32 mask); 153 154 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg) 155 { 156 refcount_inc(&alg->cra_refcnt); 157 return alg; 158 } 159 160 void crypto_destroy_alg(struct crypto_alg *alg); 161 162 static inline void crypto_alg_put(struct crypto_alg *alg) 163 { 164 if (refcount_dec_and_test(&alg->cra_refcnt)) 165 crypto_destroy_alg(alg); 166 } 167 168 static inline int crypto_tmpl_get(struct crypto_template *tmpl) 169 { 170 return try_module_get(tmpl->module); 171 } 172 173 static inline void crypto_tmpl_put(struct crypto_template *tmpl) 174 { 175 module_put(tmpl->module); 176 } 177 178 static inline int crypto_is_larval(struct crypto_alg *alg) 179 { 180 return alg->cra_flags & CRYPTO_ALG_LARVAL; 181 } 182 183 static inline int crypto_is_dead(struct crypto_alg *alg) 184 { 185 return alg->cra_flags & CRYPTO_ALG_DEAD; 186 } 187 188 static inline int crypto_is_moribund(struct crypto_alg *alg) 189 { 190 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 191 } 192 193 static inline void crypto_notify(unsigned long val, void *v) 194 { 195 blocking_notifier_call_chain(&crypto_chain, val, v); 196 } 197 198 static inline void crypto_yield(u32 flags) 199 { 200 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP) 201 cond_resched(); 202 } 203 204 static inline int crypto_is_test_larval(struct crypto_larval *larval) 205 { 206 return larval->alg.cra_driver_name[0]; 207 } 208 209 #endif /* _CRYPTO_INTERNAL_H */ 210 211