1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Public Key Encryption
5 * Copyright (c) 2015, Intel Corporation
6 * Authors: Tadeusz Struk <tadeusz.struk@intel.com>
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>
24 static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
26 struct crypto_report_akcipher rakcipher;
28 memset(&rakcipher, 0, sizeof(rakcipher));
30 strscpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
32 return nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
33 sizeof(rakcipher), &rakcipher);
36 static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
42 static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
45 static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
47 seq_puts(m, "type : akcipher\n");
50 static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
52 struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
53 struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
58 static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
60 struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
61 struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
64 akcipher->base.exit = crypto_akcipher_exit_tfm;
67 return alg->init(akcipher);
72 static void crypto_akcipher_free_instance(struct crypto_instance *inst)
74 struct akcipher_instance *akcipher = akcipher_instance(inst);
76 akcipher->free(akcipher);
79 static 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,
84 .show = crypto_akcipher_show,
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),
93 int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn,
94 struct crypto_instance *inst,
95 const char *name, u32 type, u32 mask)
97 spawn->base.frontend = &crypto_akcipher_type;
98 return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
100 EXPORT_SYMBOL_GPL(crypto_grab_akcipher);
102 struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
105 return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);
107 EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
109 static void akcipher_prepare_alg(struct akcipher_alg *alg)
111 struct crypto_alg *base = &alg->base;
113 base->cra_type = &crypto_akcipher_type;
114 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
115 base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;
118 static int akcipher_default_op(struct akcipher_request *req)
123 static int akcipher_default_set_key(struct crypto_akcipher *tfm,
124 const void *key, unsigned int keylen)
129 int crypto_register_akcipher(struct akcipher_alg *alg)
131 struct crypto_alg *base = &alg->base;
134 alg->sign = akcipher_default_op;
136 alg->verify = akcipher_default_op;
138 alg->encrypt = akcipher_default_op;
140 alg->decrypt = akcipher_default_op;
141 if (!alg->set_priv_key)
142 alg->set_priv_key = akcipher_default_set_key;
144 akcipher_prepare_alg(alg);
145 return crypto_register_alg(base);
147 EXPORT_SYMBOL_GPL(crypto_register_akcipher);
149 void crypto_unregister_akcipher(struct akcipher_alg *alg)
151 crypto_unregister_alg(&alg->base);
153 EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
155 int akcipher_register_instance(struct crypto_template *tmpl,
156 struct akcipher_instance *inst)
158 if (WARN_ON(!inst->free))
160 akcipher_prepare_alg(&inst->alg);
161 return crypto_register_instance(tmpl, akcipher_crypto_instance(inst));
163 EXPORT_SYMBOL_GPL(akcipher_register_instance);
165 MODULE_LICENSE("GPL");
166 MODULE_DESCRIPTION("Generic public key cipher type");