crypto/internal.h

   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 #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
 132 int crypto_akcipher_sync_prep(struct crypto_akcipher_sync_data *data);
 133 int crypto_akcipher_sync_post(struct crypto_akcipher_sync_data *data, int err);
 134 int crypto_init_akcipher_ops_sig(struct crypto_tfm *tfm);
 135
 136 static inline void *crypto_create_tfm(struct crypto_alg *alg,
 137                         const struct crypto_type *frontend)
 138 {
 139         return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE);
 140 }
 141
 142 struct crypto_alg *crypto_find_alg(const char *alg_name,
 143                                    const struct crypto_type *frontend,
 144                                    u32 type, u32 mask);
 145
 146 void *crypto_alloc_tfm_node(const char *alg_name,
 147                        const struct crypto_type *frontend, u32 type, u32 mask,
 148                        int node);
 149
 150 static inline void *crypto_alloc_tfm(const char *alg_name,
 151                        const struct crypto_type *frontend, u32 type, u32 mask)
 152 {
 153         return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE);
 154 }
 155
 156 int crypto_probing_notify(unsigned long val, void *v);
 157
 158 unsigned int crypto_alg_extsize(struct crypto_alg *alg);
 159
 160 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
 161                         u32 type, u32 mask);
 162
 163 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
 164 {
 165         refcount_inc(&alg->cra_refcnt);
 166         return alg;
 167 }
 168
 169 static inline void crypto_alg_put(struct crypto_alg *alg)
 170 {
 171         if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
 172                 alg->cra_destroy(alg);
 173 }
 174
 175 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
 176 {
 177         return try_module_get(tmpl->module);
 178 }
 179
 180 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
 181 {
 182         module_put(tmpl->module);
 183 }
 184
 185 static inline int crypto_is_larval(struct crypto_alg *alg)
 186 {
 187         return alg->cra_flags & CRYPTO_ALG_LARVAL;
 188 }
 189
 190 static inline int crypto_is_dead(struct crypto_alg *alg)
 191 {
 192         return alg->cra_flags & CRYPTO_ALG_DEAD;
 193 }
 194
 195 static inline int crypto_is_moribund(struct crypto_alg *alg)
 196 {
 197         return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
 198 }
 199
 200 static inline void crypto_notify(unsigned long val, void *v)
 201 {
 202         blocking_notifier_call_chain(&crypto_chain, val, v);
 203 }
 204
 205 static inline void crypto_yield(u32 flags)
 206 {
 207         if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
 208                 cond_resched();
 209 }
 210
 211 static inline int crypto_is_test_larval(struct crypto_larval *larval)
 212 {
 213         return larval->alg.cra_driver_name[0];
 214 }
 215
 216 static inline struct crypto_tfm *crypto_tfm_get(struct crypto_tfm *tfm)
 217 {
 218         return refcount_inc_not_zero(&tfm->refcnt) ? tfm : ERR_PTR(-EOVERFLOW);
 219 }
 220
 221 #endif  /* _CRYPTO_INTERNAL_H */
 222