| 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 | |