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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Cryptographic API.
4 *
5 * Copyright (c) 2002 James Morris <[email protected]>
6 * Copyright (c) 2005 Herbert Xu <[email protected]>
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/jump_label.h>
14#include <linux/list.h>
15#include <linux/module.h>
16#include <linux/notifier.h>
17#include <linux/numa.h>
18#include <linux/refcount.h>
19#include <linux/rwsem.h>
20#include <linux/scatterlist.h>
21#include <linux/sched.h>
22#include <linux/types.h>
23
24struct crypto_instance;
25struct crypto_template;
26
27struct crypto_larval {
28 struct crypto_alg alg;
29 struct crypto_alg *adult;
30 struct completion completion;
31 u32 mask;
32 bool test_started;
33};
34
35struct crypto_type {
36 unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
37 unsigned int (*extsize)(struct crypto_alg *alg);
38 int (*init_tfm)(struct crypto_tfm *tfm);
39 void (*show)(struct seq_file *m, struct crypto_alg *alg);
40 int (*report)(struct sk_buff *skb, struct crypto_alg *alg);
41 void (*free)(struct crypto_instance *inst);
42 void (*destroy)(struct crypto_alg *alg);
43
44 unsigned int type;
45 unsigned int maskclear;
46 unsigned int maskset;
47 unsigned int tfmsize;
48 unsigned int algsize;
49};
50
51enum {
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
63extern struct rw_semaphore crypto_alg_sem;
64extern struct list_head crypto_alg_list __guarded_by(&crypto_alg_sem);
65extern struct blocking_notifier_head crypto_chain;
66
67int alg_test(const char *driver, const char *alg, u32 type, u32 mask);
68
69#if !IS_BUILTIN(CONFIG_CRYPTO_ALGAPI) || !IS_ENABLED(CONFIG_CRYPTO_SELFTESTS)
70static inline bool crypto_boot_test_finished(void)
71{
72 return true;
73}
74static inline void set_crypto_boot_test_finished(void)
75{
76}
77#else
78DECLARE_STATIC_KEY_FALSE(__crypto_boot_test_finished);
79static inline bool crypto_boot_test_finished(void)
80{
81 return static_branch_likely(&__crypto_boot_test_finished);
82}
83static 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_SELFTESTS)
89 */
90
91#ifdef CONFIG_PROC_FS
92void __init crypto_init_proc(void);
93void __exit crypto_exit_proc(void);
94#else
95static inline void crypto_init_proc(void)
96{ }
97static inline void crypto_exit_proc(void)
98{ }
99#endif
100
101static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
102{
103 return alg->cra_ctxsize;
104}
105
106static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
107{
108 return alg->cra_ctxsize;
109}
110
111struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
112struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
113
114struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
115void crypto_schedule_test(struct crypto_larval *larval);
116void crypto_alg_tested(const char *name, int err);
117
118void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
119 struct crypto_alg *nalg);
120void crypto_remove_final(struct list_head *list);
121void crypto_shoot_alg(struct crypto_alg *alg);
122struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
123 u32 mask);
124void *crypto_create_tfm_node(struct crypto_alg *alg,
125 const struct crypto_type *frontend, int node);
126
127static inline void *crypto_create_tfm(struct crypto_alg *alg,
128 const struct crypto_type *frontend)
129{
130 return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE);
131}
132
133struct crypto_alg *crypto_find_alg(const char *alg_name,
134 const struct crypto_type *frontend,
135 u32 type, u32 mask);
136
137void *crypto_alloc_tfm_node(const char *alg_name,
138 const struct crypto_type *frontend, u32 type, u32 mask,
139 int node);
140
141static inline void *crypto_alloc_tfm(const char *alg_name,
142 const struct crypto_type *frontend, u32 type, u32 mask)
143{
144 return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE);
145}
146
147int crypto_probing_notify(unsigned long val, void *v);
148
149unsigned int crypto_alg_extsize(struct crypto_alg *alg);
150
151int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
152 u32 type, u32 mask);
153
154static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
155{
156 refcount_inc(&alg->cra_refcnt);
157 return alg;
158}
159
160void crypto_destroy_alg(struct crypto_alg *alg);
161
162static inline void crypto_alg_put(struct crypto_alg *alg)
163{
164 if (refcount_dec_and_test(&alg->cra_refcnt))
165 crypto_destroy_alg(alg);
166}
167
168static inline int crypto_tmpl_get(struct crypto_template *tmpl)
169{
170 return try_module_get(tmpl->module);
171}
172
173static inline void crypto_tmpl_put(struct crypto_template *tmpl)
174{
175 module_put(tmpl->module);
176}
177
178static inline int crypto_is_larval(struct crypto_alg *alg)
179{
180 return alg->cra_flags & CRYPTO_ALG_LARVAL;
181}
182
183static inline int crypto_is_dead(struct crypto_alg *alg)
184{
185 return alg->cra_flags & CRYPTO_ALG_DEAD;
186}
187
188static inline int crypto_is_moribund(struct crypto_alg *alg)
189{
190 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
191}
192
193static inline void crypto_notify(unsigned long val, void *v)
194{
195 blocking_notifier_call_chain(&crypto_chain, val, v);
196}
197
198static inline void crypto_yield(u32 flags)
199{
200 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
201 cond_resched();
202}
203
204static inline int crypto_is_test_larval(struct crypto_larval *larval)
205{
206 return larval->alg.cra_driver_name[0];
207}
208
209#endif /* _CRYPTO_INTERNAL_H */
210