1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Public Key Encryption
4 *
5 * Copyright (c) 2015, Intel Corporation
6 * Authors: Tadeusz Struk <tadeusz.struk@intel.com>
7 */
8 #ifndef _CRYPTO_AKCIPHER_INT_H
9 #define _CRYPTO_AKCIPHER_INT_H
10 #include <crypto/akcipher.h>
11 #include <crypto/algapi.h>
12
13 struct akcipher_instance {
14 void (*free)(struct akcipher_instance *inst);
15 union {
16 struct {
17 char head[offsetof(struct akcipher_alg, base)];
18 struct crypto_instance base;
19 } s;
20 struct akcipher_alg alg;
21 };
22 };
23
24 struct crypto_akcipher_spawn {
25 struct crypto_spawn base;
26 };
27
28 /*
29 * Transform internal helpers.
30 */
31 static inline void *akcipher_request_ctx(struct akcipher_request *req)
32 {
33 return req->__ctx;
34 }
35
36 static inline void *akcipher_request_ctx_dma(struct akcipher_request *req)
37 {
38 unsigned int align = crypto_dma_align();
39
40 if (align <= crypto_tfm_ctx_alignment())
41 align = 1;
42
43 return PTR_ALIGN(akcipher_request_ctx(req), align);
44 }
45
46 static inline void akcipher_set_reqsize(struct crypto_akcipher *akcipher,
47 unsigned int reqsize)
48 {
49 akcipher->reqsize = reqsize;
50 }
51
52 static inline void akcipher_set_reqsize_dma(struct crypto_akcipher *akcipher,
53 unsigned int reqsize)
54 {
55 reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1);
56 akcipher->reqsize = reqsize;
57 }
58
59 static inline void *akcipher_tfm_ctx(struct crypto_akcipher *tfm)
60 {
61 return crypto_tfm_ctx(&tfm->base);
62 }
63
64 static inline void *akcipher_tfm_ctx_dma(struct crypto_akcipher *tfm)
65 {
66 return crypto_tfm_ctx_dma(&tfm->base);
67 }
68
69 static inline void akcipher_request_complete(struct akcipher_request *req,
70 int err)
71 {
72 crypto_request_complete(&req->base, err);
73 }
74
75 static inline const char *akcipher_alg_name(struct crypto_akcipher *tfm)
76 {
77 return crypto_akcipher_tfm(tfm)->__crt_alg->cra_name;
78 }
79
80 static inline struct crypto_instance *akcipher_crypto_instance(
81 struct akcipher_instance *inst)
82 {
83 return container_of(&inst->alg.base, struct crypto_instance, alg);
84 }
85
86 static inline struct akcipher_instance *akcipher_instance(
87 struct crypto_instance *inst)
88 {
89 return container_of(&inst->alg, struct akcipher_instance, alg.base);
90 }
91
92 static inline struct akcipher_instance *akcipher_alg_instance(
93 struct crypto_akcipher *akcipher)
94 {
95 return akcipher_instance(crypto_tfm_alg_instance(&akcipher->base));
96 }
97
98 static inline void *akcipher_instance_ctx(struct akcipher_instance *inst)
99 {
100 return crypto_instance_ctx(akcipher_crypto_instance(inst));
101 }
102
103 int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn,
104 struct crypto_instance *inst,
105 const char *name, u32 type, u32 mask);
106
107 static inline struct crypto_akcipher *crypto_spawn_akcipher(
108 struct crypto_akcipher_spawn *spawn)
109 {
110 return crypto_spawn_tfm2(&spawn->base);
111 }
112
113 static inline void crypto_drop_akcipher(struct crypto_akcipher_spawn *spawn)
114 {
115 crypto_drop_spawn(&spawn->base);
116 }
117
118 static inline struct akcipher_alg *crypto_spawn_akcipher_alg(
119 struct crypto_akcipher_spawn *spawn)
120 {
121 return container_of(spawn->base.alg, struct akcipher_alg, base);
122 }
123
124 /**
125 * crypto_register_akcipher() -- Register public key algorithm
126 *
127 * Function registers an implementation of a public key verify algorithm
128 *
129 * @alg: algorithm definition
130 *
131 * Return: zero on success; error code in case of error
132 */
133 int crypto_register_akcipher(struct akcipher_alg *alg);
134
135 /**
136 * crypto_unregister_akcipher() -- Unregister public key algorithm
137 *
138 * Function unregisters an implementation of a public key verify algorithm
139 *
140 * @alg: algorithm definition
141 */
142 void crypto_unregister_akcipher(struct akcipher_alg *alg);
143
144 /**
145 * akcipher_register_instance() -- Unregister public key template instance
146 *
147 * Function registers an implementation of an asymmetric key algorithm
148 * created from a template
149 *
150 * @tmpl: the template from which the algorithm was created
151 * @inst: the template instance
152 */
153 int akcipher_register_instance(struct crypto_template *tmpl,
154 struct akcipher_instance *inst);
155 #endif
156
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