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 44 unsigned int type; 45 unsigned int maskclear; 46 unsigned int maskset; 47 unsigned int tfmsize; 48 }; 49 50 enum { 51 CRYPTOA_UNSPEC, 52 CRYPTOA_ALG, 53 CRYPTOA_TYPE, 54 __CRYPTOA_MAX, 55 }; 56 57 #define CRYPTOA_MAX (__CRYPTOA_MAX - 1) 58 59 /* Maximum number of (rtattr) parameters for each template. */ 60 #define CRYPTO_MAX_ATTRS 32 61 62 extern struct list_head crypto_alg_list; 63 extern struct rw_semaphore crypto_alg_sem; 64 extern struct blocking_notifier_head crypto_chain; 65 66 int alg_test(const char *driver, const char *alg, u32 type, u32 mask); 67 68 #if !IS_BUILTIN(CONFIG_CRYPTO_ALGAPI) || \ 69 IS_ENABLED(CONFIG_CRYPTO_MANAGER_DISABLE_TESTS) 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_MANAGER_DISABLE_TESTS) 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_tfmgfp(struct crypto_alg *alg, u32 type, 123 u32 mask, gfp_t gfp); 124 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, 125 u32 mask); 126 void *crypto_create_tfm_node(struct crypto_alg *alg, 127 const struct crypto_type *frontend, int node); 128 void *crypto_clone_tfm(const struct crypto_type *frontend, 129 struct crypto_tfm *otfm); 130 131 static inline void *crypto_create_tfm(struct crypto_alg *alg, 132 const struct crypto_type *frontend) 133 { 134 return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE); 135 } 136 137 struct crypto_alg *crypto_find_alg(const char *alg_name, 138 const struct crypto_type *frontend, 139 u32 type, u32 mask); 140 141 void *crypto_alloc_tfm_node(const char *alg_name, 142 const struct crypto_type *frontend, u32 type, u32 mask, 143 int node); 144 145 static inline void *crypto_alloc_tfm(const char *alg_name, 146 const struct crypto_type *frontend, u32 type, u32 mask) 147 { 148 return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE); 149 } 150 151 int crypto_probing_notify(unsigned long val, void *v); 152 153 unsigned int crypto_alg_extsize(struct crypto_alg *alg); 154 155 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend, 156 u32 type, u32 mask); 157 158 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg) 159 { 160 refcount_inc(&alg->cra_refcnt); 161 return alg; 162 } 163 164 static inline void crypto_alg_put(struct crypto_alg *alg) 165 { 166 if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) 167 alg->cra_destroy(alg); 168 } 169 170 static inline int crypto_tmpl_get(struct crypto_template *tmpl) 171 { 172 return try_module_get(tmpl->module); 173 } 174 175 static inline void crypto_tmpl_put(struct crypto_template *tmpl) 176 { 177 module_put(tmpl->module); 178 } 179 180 static inline int crypto_is_larval(struct crypto_alg *alg) 181 { 182 return alg->cra_flags & CRYPTO_ALG_LARVAL; 183 } 184 185 static inline int crypto_is_dead(struct crypto_alg *alg) 186 { 187 return alg->cra_flags & CRYPTO_ALG_DEAD; 188 } 189 190 static inline int crypto_is_moribund(struct crypto_alg *alg) 191 { 192 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 193 } 194 195 static inline void crypto_notify(unsigned long val, void *v) 196 { 197 blocking_notifier_call_chain(&crypto_chain, val, v); 198 } 199 200 static inline void crypto_yield(u32 flags) 201 { 202 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP) 203 cond_resched(); 204 } 205 206 static inline int crypto_is_test_larval(struct crypto_larval *larval) 207 { 208 return larval->alg.cra_driver_name[0]; 209 } 210 211 static inline struct crypto_tfm *crypto_tfm_get(struct crypto_tfm *tfm) 212 { 213 return refcount_inc_not_zero(&tfm->refcnt) ? tfm : ERR_PTR(-EOVERFLOW); 214 } 215 216 #endif /* _CRYPTO_INTERNAL_H */ 217 218