1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Public Key Signature Algorithm
4 *
5 * Copyright (c) 2023 Herbert Xu <herbert@gondor.apana.org.au>
6 */
7#ifndef _CRYPTO_INTERNAL_SIG_H
8#define _CRYPTO_INTERNAL_SIG_H
9
10#include <crypto/algapi.h>
11#include <crypto/sig.h>
12
13struct sig_instance {
14 void (*free)(struct sig_instance *inst);
15 union {
16 struct {
17 char head[offsetof(struct sig_alg, base)];
18 struct crypto_instance base;
19 };
20 struct sig_alg alg;
21 };
22};
23
24struct crypto_sig_spawn {
25 struct crypto_spawn base;
26};
27
28static inline void *crypto_sig_ctx(struct crypto_sig *tfm)
29{
30 return crypto_tfm_ctx(tfm: &tfm->base);
31}
32
33/**
34 * crypto_register_sig() -- Register public key signature algorithm
35 *
36 * Function registers an implementation of a public key signature algorithm
37 *
38 * @alg: algorithm definition
39 *
40 * Return: zero on success; error code in case of error
41 */
42int crypto_register_sig(struct sig_alg *alg);
43
44/**
45 * crypto_unregister_sig() -- Unregister public key signature algorithm
46 *
47 * Function unregisters an implementation of a public key signature algorithm
48 *
49 * @alg: algorithm definition
50 */
51void crypto_unregister_sig(struct sig_alg *alg);
52
53int sig_register_instance(struct crypto_template *tmpl,
54 struct sig_instance *inst);
55
56static inline struct sig_instance *sig_instance(struct crypto_instance *inst)
57{
58 return container_of(&inst->alg, struct sig_instance, alg.base);
59}
60
61static inline struct sig_instance *sig_alg_instance(struct crypto_sig *tfm)
62{
63 return sig_instance(inst: crypto_tfm_alg_instance(tfm: &tfm->base));
64}
65
66static inline struct crypto_instance *sig_crypto_instance(struct sig_instance
67 *inst)
68{
69 return container_of(&inst->alg.base, struct crypto_instance, alg);
70}
71
72static inline void *sig_instance_ctx(struct sig_instance *inst)
73{
74 return crypto_instance_ctx(inst: sig_crypto_instance(inst));
75}
76
77int crypto_grab_sig(struct crypto_sig_spawn *spawn,
78 struct crypto_instance *inst,
79 const char *name, u32 type, u32 mask);
80
81static inline struct crypto_sig *crypto_spawn_sig(struct crypto_sig_spawn
82 *spawn)
83{
84 return crypto_spawn_tfm2(spawn: &spawn->base);
85}
86
87static inline void crypto_drop_sig(struct crypto_sig_spawn *spawn)
88{
89 crypto_drop_spawn(spawn: &spawn->base);
90}
91
92static inline struct sig_alg *crypto_spawn_sig_alg(struct crypto_sig_spawn
93 *spawn)
94{
95 return container_of(spawn->base.alg, struct sig_alg, base);
96}
97#endif
98

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