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/list.h>
14 #include <linux/module.h>
15 #include <linux/notifier.h>
16 #include <linux/numa.h>
17 #include <linux/refcount.h>
18 #include <linux/rwsem.h>
19 #include <linux/sched.h>
20 #include <linux/types.h>
21
22 struct crypto_instance;
23 struct crypto_template;
24
25 struct crypto_larval {
26 struct crypto_alg alg;
27 struct crypto_alg *adult;
28 struct completion completion;
29 u32 mask;
30 };
31
32 enum {
33 CRYPTOA_UNSPEC,
34 CRYPTOA_ALG,
35 CRYPTOA_TYPE,
36 __CRYPTOA_MAX,
37 };
38
39 #define CRYPTOA_MAX (__CRYPTOA_MAX - 1)
40
41 /* Maximum number of (rtattr) parameters for each template. */
42 #define CRYPTO_MAX_ATTRS 32
43
44 extern struct list_head crypto_alg_list;
45 extern struct rw_semaphore crypto_alg_sem;
46 extern struct blocking_notifier_head crypto_chain;
47
48 #ifdef CONFIG_PROC_FS
49 void __init crypto_init_proc(void);
50 void __exit crypto_exit_proc(void);
51 #else
crypto_init_proc(void)52 static inline void crypto_init_proc(void)
53 { }
crypto_exit_proc(void)54 static inline void crypto_exit_proc(void)
55 { }
56 #endif
57
crypto_cipher_ctxsize(struct crypto_alg * alg)58 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
59 {
60 return alg->cra_ctxsize;
61 }
62
crypto_compress_ctxsize(struct crypto_alg * alg)63 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
64 {
65 return alg->cra_ctxsize;
66 }
67
68 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
69 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
70
71 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
72 void crypto_larval_kill(struct crypto_alg *alg);
73 void crypto_alg_tested(const char *name, int err);
74
75 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
76 struct crypto_alg *nalg);
77 void crypto_remove_final(struct list_head *list);
78 void crypto_shoot_alg(struct crypto_alg *alg);
79 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
80 u32 mask);
81 void *crypto_create_tfm_node(struct crypto_alg *alg,
82 const struct crypto_type *frontend, int node);
83
crypto_create_tfm(struct crypto_alg * alg,const struct crypto_type * frontend)84 static inline void *crypto_create_tfm(struct crypto_alg *alg,
85 const struct crypto_type *frontend)
86 {
87 return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE);
88 }
89
90 struct crypto_alg *crypto_find_alg(const char *alg_name,
91 const struct crypto_type *frontend,
92 u32 type, u32 mask);
93
94 void *crypto_alloc_tfm_node(const char *alg_name,
95 const struct crypto_type *frontend, u32 type, u32 mask,
96 int node);
97
crypto_alloc_tfm(const char * alg_name,const struct crypto_type * frontend,u32 type,u32 mask)98 static inline void *crypto_alloc_tfm(const char *alg_name,
99 const struct crypto_type *frontend, u32 type, u32 mask)
100 {
101 return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE);
102 }
103
104 int crypto_probing_notify(unsigned long val, void *v);
105
106 unsigned int crypto_alg_extsize(struct crypto_alg *alg);
107
108 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
109 u32 type, u32 mask);
110
crypto_alg_get(struct crypto_alg * alg)111 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
112 {
113 refcount_inc(&alg->cra_refcnt);
114 return alg;
115 }
116
crypto_alg_put(struct crypto_alg * alg)117 static inline void crypto_alg_put(struct crypto_alg *alg)
118 {
119 if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
120 alg->cra_destroy(alg);
121 }
122
crypto_tmpl_get(struct crypto_template * tmpl)123 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
124 {
125 return try_module_get(tmpl->module);
126 }
127
crypto_tmpl_put(struct crypto_template * tmpl)128 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
129 {
130 module_put(tmpl->module);
131 }
132
crypto_is_larval(struct crypto_alg * alg)133 static inline int crypto_is_larval(struct crypto_alg *alg)
134 {
135 return alg->cra_flags & CRYPTO_ALG_LARVAL;
136 }
137
crypto_is_dead(struct crypto_alg * alg)138 static inline int crypto_is_dead(struct crypto_alg *alg)
139 {
140 return alg->cra_flags & CRYPTO_ALG_DEAD;
141 }
142
crypto_is_moribund(struct crypto_alg * alg)143 static inline int crypto_is_moribund(struct crypto_alg *alg)
144 {
145 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
146 }
147
crypto_notify(unsigned long val,void * v)148 static inline void crypto_notify(unsigned long val, void *v)
149 {
150 blocking_notifier_call_chain(&crypto_chain, val, v);
151 }
152
crypto_yield(u32 flags)153 static inline void crypto_yield(u32 flags)
154 {
155 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
156 cond_resched();
157 }
158
159 #endif /* _CRYPTO_INTERNAL_H */
160
161
