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7#ifndef _CRYPTO_ALGAPI_H
8#define _CRYPTO_ALGAPI_H
9
10#include <linux/align.h>
11#include <linux/crypto.h>
12#include <linux/kconfig.h>
13#include <linux/list.h>
14#include <linux/types.h>
15
16#include <asm/unaligned.h>
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22
23#define MAX_ALGAPI_BLOCKSIZE 160
24#define MAX_ALGAPI_ALIGNMASK 63
25#define MAX_CIPHER_BLOCKSIZE 16
26#define MAX_CIPHER_ALIGNMASK 15
27
28struct crypto_aead;
29struct crypto_instance;
30struct module;
31struct notifier_block;
32struct rtattr;
33struct seq_file;
34struct sk_buff;
35
36struct crypto_type {
37 unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
38 unsigned int (*extsize)(struct crypto_alg *alg);
39 int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask);
40 int (*init_tfm)(struct crypto_tfm *tfm);
41 void (*show)(struct seq_file *m, struct crypto_alg *alg);
42 int (*report)(struct sk_buff *skb, struct crypto_alg *alg);
43 void (*free)(struct crypto_instance *inst);
44
45 unsigned int type;
46 unsigned int maskclear;
47 unsigned int maskset;
48 unsigned int tfmsize;
49};
50
51struct crypto_instance {
52 struct crypto_alg alg;
53
54 struct crypto_template *tmpl;
55
56 union {
57
58 struct hlist_node list;
59
60 struct crypto_spawn *spawns;
61 };
62
63 void *__ctx[] CRYPTO_MINALIGN_ATTR;
64};
65
66struct crypto_template {
67 struct list_head list;
68 struct hlist_head instances;
69 struct module *module;
70
71 int (*create)(struct crypto_template *tmpl, struct rtattr **tb);
72
73 char name[CRYPTO_MAX_ALG_NAME];
74};
75
76struct crypto_spawn {
77 struct list_head list;
78 struct crypto_alg *alg;
79 union {
80
81 struct crypto_instance *inst;
82
83 struct crypto_spawn *next;
84 };
85 const struct crypto_type *frontend;
86 u32 mask;
87 bool dead;
88 bool registered;
89};
90
91struct crypto_queue {
92 struct list_head list;
93 struct list_head *backlog;
94
95 unsigned int qlen;
96 unsigned int max_qlen;
97};
98
99struct scatter_walk {
100 struct scatterlist *sg;
101 unsigned int offset;
102};
103
104struct crypto_attr_alg {
105 char name[CRYPTO_MAX_ALG_NAME];
106};
107
108struct crypto_attr_type {
109 u32 type;
110 u32 mask;
111};
112
113void crypto_mod_put(struct crypto_alg *alg);
114
115int crypto_register_template(struct crypto_template *tmpl);
116int crypto_register_templates(struct crypto_template *tmpls, int count);
117void crypto_unregister_template(struct crypto_template *tmpl);
118void crypto_unregister_templates(struct crypto_template *tmpls, int count);
119struct crypto_template *crypto_lookup_template(const char *name);
120
121int crypto_register_instance(struct crypto_template *tmpl,
122 struct crypto_instance *inst);
123void crypto_unregister_instance(struct crypto_instance *inst);
124
125int crypto_grab_spawn(struct crypto_spawn *spawn, struct crypto_instance *inst,
126 const char *name, u32 type, u32 mask);
127void crypto_drop_spawn(struct crypto_spawn *spawn);
128struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
129 u32 mask);
130void *crypto_spawn_tfm2(struct crypto_spawn *spawn);
131
132struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
133int crypto_check_attr_type(struct rtattr **tb, u32 type, u32 *mask_ret);
134const char *crypto_attr_alg_name(struct rtattr *rta);
135int crypto_inst_setname(struct crypto_instance *inst, const char *name,
136 struct crypto_alg *alg);
137
138void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
139int crypto_enqueue_request(struct crypto_queue *queue,
140 struct crypto_async_request *request);
141void crypto_enqueue_request_head(struct crypto_queue *queue,
142 struct crypto_async_request *request);
143struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
144static inline unsigned int crypto_queue_len(struct crypto_queue *queue)
145{
146 return queue->qlen;
147}
148
149void crypto_inc(u8 *a, unsigned int size);
150void __crypto_xor(u8 *dst, const u8 *src1, const u8 *src2, unsigned int size);
151
152static inline void crypto_xor(u8 *dst, const u8 *src, unsigned int size)
153{
154 if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
155 __builtin_constant_p(size) &&
156 (size % sizeof(unsigned long)) == 0) {
157 unsigned long *d = (unsigned long *)dst;
158 unsigned long *s = (unsigned long *)src;
159 unsigned long l;
160
161 while (size > 0) {
162 l = get_unaligned(d) ^ get_unaligned(s++);
163 put_unaligned(l, d++);
164 size -= sizeof(unsigned long);
165 }
166 } else {
167 __crypto_xor(dst, dst, src, size);
168 }
169}
170
171static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2,
172 unsigned int size)
173{
174 if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
175 __builtin_constant_p(size) &&
176 (size % sizeof(unsigned long)) == 0) {
177 unsigned long *d = (unsigned long *)dst;
178 unsigned long *s1 = (unsigned long *)src1;
179 unsigned long *s2 = (unsigned long *)src2;
180 unsigned long l;
181
182 while (size > 0) {
183 l = get_unaligned(s1++) ^ get_unaligned(s2++);
184 put_unaligned(l, d++);
185 size -= sizeof(unsigned long);
186 }
187 } else {
188 __crypto_xor(dst, src1, src2, size);
189 }
190}
191
192static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
193{
194 return PTR_ALIGN(crypto_tfm_ctx(tfm),
195 crypto_tfm_alg_alignmask(tfm) + 1);
196}
197
198static inline struct crypto_instance *crypto_tfm_alg_instance(
199 struct crypto_tfm *tfm)
200{
201 return container_of(tfm->__crt_alg, struct crypto_instance, alg);
202}
203
204static inline void *crypto_instance_ctx(struct crypto_instance *inst)
205{
206 return inst->__ctx;
207}
208
209static inline struct crypto_async_request *crypto_get_backlog(
210 struct crypto_queue *queue)
211{
212 return queue->backlog == &queue->list ? NULL :
213 container_of(queue->backlog, struct crypto_async_request, list);
214}
215
216static inline u32 crypto_requires_off(struct crypto_attr_type *algt, u32 off)
217{
218 return (algt->type ^ off) & algt->mask & off;
219}
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225
226#define CRYPTO_ALG_INHERITED_FLAGS \
227 (CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK | \
228 CRYPTO_ALG_ALLOCATES_MEMORY)
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236static inline u32 crypto_algt_inherited_mask(struct crypto_attr_type *algt)
237{
238 return crypto_requires_off(algt, CRYPTO_ALG_INHERITED_FLAGS);
239}
240
241noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);
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253static inline int crypto_memneq(const void *a, const void *b, size_t size)
254{
255 return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
256}
257
258int crypto_register_notifier(struct notifier_block *nb);
259int crypto_unregister_notifier(struct notifier_block *nb);
260
261
262enum {
263 CRYPTO_MSG_ALG_REQUEST,
264 CRYPTO_MSG_ALG_REGISTER,
265 CRYPTO_MSG_ALG_LOADED,
266};
267
268#endif
269