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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#include <linux/errno.h>
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/seq_file.h>
12#include <linux/slab.h>
13#include <linux/string.h>
14#include <linux/crypto.h>
15#include <linux/compiler.h>
16#include <crypto/algapi.h>
17#include <linux/cryptouser.h>
18#include <net/netlink.h>
19#include <crypto/akcipher.h>
20#include <crypto/internal/akcipher.h>
21#include "internal.h"
22
23#ifdef CONFIG_NET
24static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
25{
26 struct crypto_report_akcipher rakcipher;
27
28 memset(&rakcipher, 0, sizeof(rakcipher));
29
30 strscpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
31
32 return nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
33 sizeof(rakcipher), &rakcipher);
34}
35#else
36static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
37{
38 return -ENOSYS;
39}
40#endif
41
42static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
43 __maybe_unused;
44
45static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
46{
47 seq_puts(m, "type : akcipher\n");
48}
49
50static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
51{
52 struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
53 struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
54
55 alg->exit(akcipher);
56}
57
58static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
59{
60 struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
61 struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
62
63 if (alg->exit)
64 akcipher->base.exit = crypto_akcipher_exit_tfm;
65
66 if (alg->init)
67 return alg->init(akcipher);
68
69 return 0;
70}
71
72static void crypto_akcipher_free_instance(struct crypto_instance *inst)
73{
74 struct akcipher_instance *akcipher = akcipher_instance(inst);
75
76 akcipher->free(akcipher);
77}
78
79static const struct crypto_type crypto_akcipher_type = {
80 .extsize = crypto_alg_extsize,
81 .init_tfm = crypto_akcipher_init_tfm,
82 .free = crypto_akcipher_free_instance,
83#ifdef CONFIG_PROC_FS
84 .show = crypto_akcipher_show,
85#endif
86 .report = crypto_akcipher_report,
87 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
88 .maskset = CRYPTO_ALG_TYPE_MASK,
89 .type = CRYPTO_ALG_TYPE_AKCIPHER,
90 .tfmsize = offsetof(struct crypto_akcipher, base),
91};
92
93int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn,
94 struct crypto_instance *inst,
95 const char *name, u32 type, u32 mask)
96{
97 spawn->base.frontend = &crypto_akcipher_type;
98 return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
99}
100EXPORT_SYMBOL_GPL(crypto_grab_akcipher);
101
102struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
103 u32 mask)
104{
105 return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);
106}
107EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
108
109static void akcipher_prepare_alg(struct akcipher_alg *alg)
110{
111 struct crypto_alg *base = &alg->base;
112
113 base->cra_type = &crypto_akcipher_type;
114 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
115 base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;
116}
117
118static int akcipher_default_op(struct akcipher_request *req)
119{
120 return -ENOSYS;
121}
122
123static int akcipher_default_set_key(struct crypto_akcipher *tfm,
124 const void *key, unsigned int keylen)
125{
126 return -ENOSYS;
127}
128
129int crypto_register_akcipher(struct akcipher_alg *alg)
130{
131 struct crypto_alg *base = &alg->base;
132
133 if (!alg->sign)
134 alg->sign = akcipher_default_op;
135 if (!alg->verify)
136 alg->verify = akcipher_default_op;
137 if (!alg->encrypt)
138 alg->encrypt = akcipher_default_op;
139 if (!alg->decrypt)
140 alg->decrypt = akcipher_default_op;
141 if (!alg->set_priv_key)
142 alg->set_priv_key = akcipher_default_set_key;
143
144 akcipher_prepare_alg(alg);
145 return crypto_register_alg(base);
146}
147EXPORT_SYMBOL_GPL(crypto_register_akcipher);
148
149void crypto_unregister_akcipher(struct akcipher_alg *alg)
150{
151 crypto_unregister_alg(&alg->base);
152}
153EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
154
155int akcipher_register_instance(struct crypto_template *tmpl,
156 struct akcipher_instance *inst)
157{
158 if (WARN_ON(!inst->free))
159 return -EINVAL;
160 akcipher_prepare_alg(&inst->alg);
161 return crypto_register_instance(tmpl, akcipher_crypto_instance(inst));
162}
163EXPORT_SYMBOL_GPL(akcipher_register_instance);
164
165MODULE_LICENSE("GPL");
166MODULE_DESCRIPTION("Generic public key cipher type");
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#include <linux/errno.h>
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/seq_file.h>
12#include <linux/slab.h>
13#include <linux/string.h>
14#include <linux/crypto.h>
15#include <linux/compiler.h>
16#include <crypto/algapi.h>
17#include <linux/cryptouser.h>
18#include <net/netlink.h>
19#include <crypto/akcipher.h>
20#include <crypto/internal/akcipher.h>
21#include "internal.h"
22
23#ifdef CONFIG_NET
24static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
25{
26 struct crypto_report_akcipher rakcipher;
27
28 memset(&rakcipher, 0, sizeof(rakcipher));
29
30 strscpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
31
32 return nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
33 sizeof(rakcipher), &rakcipher);
34}
35#else
36static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
37{
38 return -ENOSYS;
39}
40#endif
41
42static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
43 __maybe_unused;
44
45static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
46{
47 seq_puts(m, "type : akcipher\n");
48}
49
50static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
51{
52 struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
53 struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
54
55 alg->exit(akcipher);
56}
57
58static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
59{
60 struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
61 struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
62
63 if (alg->exit)
64 akcipher->base.exit = crypto_akcipher_exit_tfm;
65
66 if (alg->init)
67 return alg->init(akcipher);
68
69 return 0;
70}
71
72static void crypto_akcipher_free_instance(struct crypto_instance *inst)
73{
74 struct akcipher_instance *akcipher = akcipher_instance(inst);
75
76 akcipher->free(akcipher);
77}
78
79static const struct crypto_type crypto_akcipher_type = {
80 .extsize = crypto_alg_extsize,
81 .init_tfm = crypto_akcipher_init_tfm,
82 .free = crypto_akcipher_free_instance,
83#ifdef CONFIG_PROC_FS
84 .show = crypto_akcipher_show,
85#endif
86 .report = crypto_akcipher_report,
87 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
88 .maskset = CRYPTO_ALG_TYPE_MASK,
89 .type = CRYPTO_ALG_TYPE_AKCIPHER,
90 .tfmsize = offsetof(struct crypto_akcipher, base),
91};
92
93int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn,
94 struct crypto_instance *inst,
95 const char *name, u32 type, u32 mask)
96{
97 spawn->base.frontend = &crypto_akcipher_type;
98 return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
99}
100EXPORT_SYMBOL_GPL(crypto_grab_akcipher);
101
102struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
103 u32 mask)
104{
105 return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);
106}
107EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
108
109static void akcipher_prepare_alg(struct akcipher_alg *alg)
110{
111 struct crypto_alg *base = &alg->base;
112
113 base->cra_type = &crypto_akcipher_type;
114 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
115 base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;
116}
117
118static int akcipher_default_op(struct akcipher_request *req)
119{
120 return -ENOSYS;
121}
122
123int crypto_register_akcipher(struct akcipher_alg *alg)
124{
125 struct crypto_alg *base = &alg->base;
126
127 if (!alg->sign)
128 alg->sign = akcipher_default_op;
129 if (!alg->verify)
130 alg->verify = akcipher_default_op;
131 if (!alg->encrypt)
132 alg->encrypt = akcipher_default_op;
133 if (!alg->decrypt)
134 alg->decrypt = akcipher_default_op;
135
136 akcipher_prepare_alg(alg);
137 return crypto_register_alg(base);
138}
139EXPORT_SYMBOL_GPL(crypto_register_akcipher);
140
141void crypto_unregister_akcipher(struct akcipher_alg *alg)
142{
143 crypto_unregister_alg(&alg->base);
144}
145EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
146
147int akcipher_register_instance(struct crypto_template *tmpl,
148 struct akcipher_instance *inst)
149{
150 if (WARN_ON(!inst->free))
151 return -EINVAL;
152 akcipher_prepare_alg(&inst->alg);
153 return crypto_register_instance(tmpl, akcipher_crypto_instance(inst));
154}
155EXPORT_SYMBOL_GPL(akcipher_register_instance);
156
157MODULE_LICENSE("GPL");
158MODULE_DESCRIPTION("Generic public key cipher type");