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/err.h> 14 #include <linux/jump_label.h> 15 #include <linux/list.h> 16 #include <linux/module.h> 17 #include <linux/notifier.h> 18 #include <linux/numa.h> 19 #include <linux/refcount.h> 20 #include <linux/rwsem.h> 21 #include <linux/scatterlist.h> 22 #include <linux/sched.h> 23 #include <linux/types.h> 24 25 struct crypto_instance; 26 struct crypto_template; 27 28 struct crypto_larval { 29 struct crypto_alg alg; 30 struct crypto_alg *adult; 31 struct completion completion; 32 u32 mask; 33 bool test_started; 34 }; 35 36 struct crypto_type { 37 unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask); 38 unsigned int (*extsize)(struct crypto_alg *alg); 39 int (*init_tfm)(struct crypto_tfm *tfm); 40 void (*show)(struct seq_file *m, struct crypto_alg *alg); 41 int (*report)(struct sk_buff *skb, struct crypto_alg *alg); 42 void (*free)(struct crypto_instance *inst); 43 void (*destroy)(struct crypto_alg *alg); 44 45 unsigned int type; 46 unsigned int maskclear; 47 unsigned int maskset; 48 unsigned int tfmsize; 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 list_head crypto_alg_list; 64 extern struct rw_semaphore 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) || \ 70 IS_ENABLED(CONFIG_CRYPTO_MANAGER_DISABLE_TESTS) 71 static inline bool crypto_boot_test_finished(void) 72 { 73 return true; 74 } 75 static inline void set_crypto_boot_test_finished(void) 76 { 77 } 78 #else 79 DECLARE_STATIC_KEY_FALSE(__crypto_boot_test_finished); 80 static inline bool crypto_boot_test_finished(void) 81 { 82 return static_branch_likely(&__crypto_boot_test_finished); 83 } 84 static inline void set_crypto_boot_test_finished(void) 85 { 86 static_branch_enable(&__crypto_boot_test_finished); 87 } 88 #endif /* !IS_BUILTIN(CONFIG_CRYPTO_ALGAPI) || 89 * IS_ENABLED(CONFIG_CRYPTO_MANAGER_DISABLE_TESTS) 90 */ 91 92 #ifdef CONFIG_PROC_FS 93 void __init crypto_init_proc(void); 94 void __exit crypto_exit_proc(void); 95 #else 96 static inline void crypto_init_proc(void) 97 { } 98 static inline void crypto_exit_proc(void) 99 { } 100 #endif 101 102 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg) 103 { 104 return alg->cra_ctxsize; 105 } 106 107 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg) 108 { 109 return alg->cra_ctxsize; 110 } 111 112 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); 113 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); 114 115 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask); 116 void crypto_schedule_test(struct crypto_larval *larval); 117 void crypto_alg_tested(const char *name, int err); 118 119 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, 120 struct crypto_alg *nalg); 121 void crypto_remove_final(struct list_head *list); 122 void crypto_shoot_alg(struct crypto_alg *alg); 123 struct crypto_tfm *__crypto_alloc_tfmgfp(struct crypto_alg *alg, u32 type, 124 u32 mask, gfp_t gfp); 125 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, 126 u32 mask); 127 void *crypto_create_tfm_node(struct crypto_alg *alg, 128 const struct crypto_type *frontend, int node); 129 void *crypto_clone_tfm(const struct crypto_type *frontend, 130 struct crypto_tfm *otfm); 131 void crypto_destroy_alg(struct crypto_alg *alg); 132 133 static inline void *crypto_create_tfm(struct crypto_alg *alg, 134 const struct crypto_type *frontend) 135 { 136 return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE); 137 } 138 139 struct crypto_alg *crypto_find_alg(const char *alg_name, 140 const struct crypto_type *frontend, 141 u32 type, u32 mask); 142 143 void *crypto_alloc_tfm_node(const char *alg_name, 144 const struct crypto_type *frontend, u32 type, u32 mask, 145 int node); 146 147 static inline void *crypto_alloc_tfm(const char *alg_name, 148 const struct crypto_type *frontend, u32 type, u32 mask) 149 { 150 return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE); 151 } 152 153 int crypto_probing_notify(unsigned long val, void *v); 154 155 unsigned int crypto_alg_extsize(struct crypto_alg *alg); 156 157 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend, 158 u32 type, u32 mask); 159 160 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg) 161 { 162 refcount_inc(&alg->cra_refcnt); 163 return alg; 164 } 165 166 static inline void crypto_alg_put(struct crypto_alg *alg) 167 { 168 if (refcount_dec_and_test(&alg->cra_refcnt)) 169 crypto_destroy_alg(alg); 170 } 171 172 static inline int crypto_tmpl_get(struct crypto_template *tmpl) 173 { 174 return try_module_get(tmpl->module); 175 } 176 177 static inline void crypto_tmpl_put(struct crypto_template *tmpl) 178 { 179 module_put(tmpl->module); 180 } 181 182 static inline int crypto_is_larval(struct crypto_alg *alg) 183 { 184 return alg->cra_flags & CRYPTO_ALG_LARVAL; 185 } 186 187 static inline int crypto_is_dead(struct crypto_alg *alg) 188 { 189 return alg->cra_flags & CRYPTO_ALG_DEAD; 190 } 191 192 static inline int crypto_is_moribund(struct crypto_alg *alg) 193 { 194 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 195 } 196 197 static inline void crypto_notify(unsigned long val, void *v) 198 { 199 blocking_notifier_call_chain(&crypto_chain, val, v); 200 } 201 202 static inline void crypto_yield(u32 flags) 203 { 204 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP) 205 cond_resched(); 206 } 207 208 static inline int crypto_is_test_larval(struct crypto_larval *larval) 209 { 210 return larval->alg.cra_driver_name[0]; 211 } 212 213 static inline struct crypto_tfm *crypto_tfm_get(struct crypto_tfm *tfm) 214 { 215 return refcount_inc_not_zero(&tfm->refcnt) ? tfm : ERR_PTR(-EOVERFLOW); 216 } 217 218 #endif /* _CRYPTO_INTERNAL_H */ 219 220