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
13struct 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
24struct crypto_akcipher_spawn {
25 struct crypto_spawn base;
26};
27
28/*
29 * Transform internal helpers.
30 */
31static inline void *akcipher_request_ctx(struct akcipher_request *req)
32{
33 return req->__ctx;
34}
35
36static 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
46static inline void akcipher_set_reqsize(struct crypto_akcipher *akcipher,
47 unsigned int reqsize)
48{
49 akcipher->reqsize = reqsize;
50}
51
52static 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
59static inline void *akcipher_tfm_ctx(struct crypto_akcipher *tfm)
60{
61 return crypto_tfm_ctx(tfm: &tfm->base);
62}
63
64static inline void *akcipher_tfm_ctx_dma(struct crypto_akcipher *tfm)
65{
66 return crypto_tfm_ctx_dma(tfm: &tfm->base);
67}
68
69static inline void akcipher_request_complete(struct akcipher_request *req,
70 int err)
71{
72 crypto_request_complete(req: &req->base, err);
73}
74
75static inline const char *akcipher_alg_name(struct crypto_akcipher *tfm)
76{
77 return crypto_akcipher_tfm(tfm)->__crt_alg->cra_name;
78}
79
80static 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
86static 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
92static inline struct akcipher_instance *akcipher_alg_instance(
93 struct crypto_akcipher *akcipher)
94{
95 return akcipher_instance(inst: crypto_tfm_alg_instance(tfm: &akcipher->base));
96}
97
98static inline void *akcipher_instance_ctx(struct akcipher_instance *inst)
99{
100 return crypto_instance_ctx(inst: akcipher_crypto_instance(inst));
101}
102
103int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn,
104 struct crypto_instance *inst,
105 const char *name, u32 type, u32 mask);
106
107static inline struct crypto_akcipher *crypto_spawn_akcipher(
108 struct crypto_akcipher_spawn *spawn)
109{
110 return crypto_spawn_tfm2(spawn: &spawn->base);
111}
112
113static inline void crypto_drop_akcipher(struct crypto_akcipher_spawn *spawn)
114{
115 crypto_drop_spawn(spawn: &spawn->base);
116}
117
118static 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 cipher algorithm
128 *
129 * @alg: algorithm definition
130 *
131 * Return: zero on success; error code in case of error
132 */
133int 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 cipher algorithm
139 *
140 * @alg: algorithm definition
141 */
142void 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 */
153int akcipher_register_instance(struct crypto_template *tmpl,
154 struct akcipher_instance *inst);
155#endif
156

source code of linux/include/crypto/internal/akcipher.h