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 akcipher_request; 26 struct crypto_akcipher; 27 struct crypto_instance; 28 struct crypto_template; 29 30 struct crypto_larval { 31 struct crypto_alg alg; 32 struct crypto_alg *adult; 33 struct completion completion; 34 u32 mask; 35 bool test_started; 36 }; 37 38 struct crypto_akcipher_sync_data { 39 struct crypto_akcipher *tfm; 40 const void *src; 41 void *dst; 42 unsigned int slen; 43 unsigned int dlen; 44 45 struct akcipher_request *req; 46 struct crypto_wait cwait; 47 struct scatterlist sg; 48 u8 *buf; 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 #ifdef 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 /* !CONFIG_CRYPTO_MANAGER_DISABLE_TESTS */ 88 89 #ifdef CONFIG_PROC_FS 90 void __init crypto_init_proc(void); 91 void __exit crypto_exit_proc(void); 92 #else 93 static inline void crypto_init_proc(void) 94 { } 95 static inline void crypto_exit_proc(void) 96 { } 97 #endif 98 99 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg) 100 { 101 return alg->cra_ctxsize; 102 } 103 104 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg) 105 { 106 return alg->cra_ctxsize; 107 } 108 109 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); 110 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); 111 112 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask); 113 void crypto_larval_kill(struct crypto_alg *alg); 114 void crypto_wait_for_test(struct crypto_larval *larval); 115 void crypto_alg_tested(const char *name, int err); 116 117 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, 118 struct crypto_alg *nalg); 119 void crypto_remove_final(struct list_head *list); 120 void crypto_shoot_alg(struct crypto_alg *alg); 121 struct crypto_tfm *__crypto_alloc_tfmgfp(struct crypto_alg *alg, u32 type, 122 u32 mask, gfp_t gfp); 123 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, 124 u32 mask); 125 void *crypto_create_tfm_node(struct crypto_alg *alg, 126 const struct crypto_type *frontend, int node); 127 void *crypto_clone_tfm(const struct crypto_type *frontend, 128 struct crypto_tfm *otfm); 129 130 int crypto_akcipher_sync_prep(struct crypto_akcipher_sync_data *data); 131 int crypto_akcipher_sync_post(struct crypto_akcipher_sync_data *data, int err); 132 int crypto_init_akcipher_ops_sig(struct crypto_tfm *tfm); 133 134 static inline void *crypto_create_tfm(struct crypto_alg *alg, 135 const struct crypto_type *frontend) 136 { 137 return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE); 138 } 139 140 struct crypto_alg *crypto_find_alg(const char *alg_name, 141 const struct crypto_type *frontend, 142 u32 type, u32 mask); 143 144 void *crypto_alloc_tfm_node(const char *alg_name, 145 const struct crypto_type *frontend, u32 type, u32 mask, 146 int node); 147 148 static inline void *crypto_alloc_tfm(const char *alg_name, 149 const struct crypto_type *frontend, u32 type, u32 mask) 150 { 151 return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE); 152 } 153 154 int crypto_probing_notify(unsigned long val, void *v); 155 156 unsigned int crypto_alg_extsize(struct crypto_alg *alg); 157 158 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend, 159 u32 type, u32 mask); 160 161 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg) 162 { 163 refcount_inc(&alg->cra_refcnt); 164 return alg; 165 } 166 167 static inline void crypto_alg_put(struct crypto_alg *alg) 168 { 169 if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) 170 alg->cra_destroy(alg); 171 } 172 173 static inline int crypto_tmpl_get(struct crypto_template *tmpl) 174 { 175 return try_module_get(tmpl->module); 176 } 177 178 static inline void crypto_tmpl_put(struct crypto_template *tmpl) 179 { 180 module_put(tmpl->module); 181 } 182 183 static inline int crypto_is_larval(struct crypto_alg *alg) 184 { 185 return alg->cra_flags & CRYPTO_ALG_LARVAL; 186 } 187 188 static inline int crypto_is_dead(struct crypto_alg *alg) 189 { 190 return alg->cra_flags & CRYPTO_ALG_DEAD; 191 } 192 193 static inline int crypto_is_moribund(struct crypto_alg *alg) 194 { 195 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 196 } 197 198 static inline void crypto_notify(unsigned long val, void *v) 199 { 200 blocking_notifier_call_chain(&crypto_chain, val, v); 201 } 202 203 static inline void crypto_yield(u32 flags) 204 { 205 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP) 206 cond_resched(); 207 } 208 209 static inline int crypto_is_test_larval(struct crypto_larval *larval) 210 { 211 return larval->alg.cra_driver_name[0]; 212 } 213 214 static inline struct crypto_tfm *crypto_tfm_get(struct crypto_tfm *tfm) 215 { 216 return refcount_inc_not_zero(&tfm->refcnt) ? tfm : ERR_PTR(-EOVERFLOW); 217 } 218 219 #endif /* _CRYPTO_INTERNAL_H */ 220 221