diff options
Diffstat (limited to 'crypto/kpp.c')
| -rw-r--r-- | crypto/kpp.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/crypto/kpp.c b/crypto/kpp.c new file mode 100644 index 0000000000..33d44e5938 --- /dev/null +++ b/crypto/kpp.c @@ -0,0 +1,173 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Key-agreement Protocol Primitives (KPP) + * + * Copyright (c) 2016, Intel Corporation + * Authors: Salvatore Benedetto <salvatore.benedetto@intel.com> + */ + +#include <crypto/internal/kpp.h> +#include <linux/cryptouser.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/seq_file.h> +#include <linux/string.h> +#include <net/netlink.h> + +#include "internal.h" + +static int __maybe_unused crypto_kpp_report( + struct sk_buff *skb, struct crypto_alg *alg) +{ + struct crypto_report_kpp rkpp; + + memset(&rkpp, 0, sizeof(rkpp)); + + strscpy(rkpp.type, "kpp", sizeof(rkpp.type)); + + return nla_put(skb, CRYPTOCFGA_REPORT_KPP, sizeof(rkpp), &rkpp); +} + +static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg) + __maybe_unused; + +static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg) +{ + seq_puts(m, "type : kpp\n"); +} + +static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm) +{ + struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm); + struct kpp_alg *alg = crypto_kpp_alg(kpp); + + alg->exit(kpp); +} + +static int crypto_kpp_init_tfm(struct crypto_tfm *tfm) +{ + struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm); + struct kpp_alg *alg = crypto_kpp_alg(kpp); + + if (alg->exit) + kpp->base.exit = crypto_kpp_exit_tfm; + + if (alg->init) + return alg->init(kpp); + + return 0; +} + +static void crypto_kpp_free_instance(struct crypto_instance *inst) +{ + struct kpp_instance *kpp = kpp_instance(inst); + + kpp->free(kpp); +} + +static int __maybe_unused crypto_kpp_report_stat( + struct sk_buff *skb, struct crypto_alg *alg) +{ + struct kpp_alg *kpp = __crypto_kpp_alg(alg); + struct crypto_istat_kpp *istat; + struct crypto_stat_kpp rkpp; + + istat = kpp_get_stat(kpp); + + memset(&rkpp, 0, sizeof(rkpp)); + + strscpy(rkpp.type, "kpp", sizeof(rkpp.type)); + + rkpp.stat_setsecret_cnt = atomic64_read(&istat->setsecret_cnt); + rkpp.stat_generate_public_key_cnt = + atomic64_read(&istat->generate_public_key_cnt); + rkpp.stat_compute_shared_secret_cnt = + atomic64_read(&istat->compute_shared_secret_cnt); + rkpp.stat_err_cnt = atomic64_read(&istat->err_cnt); + + return nla_put(skb, CRYPTOCFGA_STAT_KPP, sizeof(rkpp), &rkpp); +} + +static const struct crypto_type crypto_kpp_type = { + .extsize = crypto_alg_extsize, + .init_tfm = crypto_kpp_init_tfm, + .free = crypto_kpp_free_instance, +#ifdef CONFIG_PROC_FS + .show = crypto_kpp_show, +#endif +#if IS_ENABLED(CONFIG_CRYPTO_USER) + .report = crypto_kpp_report, +#endif +#ifdef CONFIG_CRYPTO_STATS + .report_stat = crypto_kpp_report_stat, +#endif + .maskclear = ~CRYPTO_ALG_TYPE_MASK, + .maskset = CRYPTO_ALG_TYPE_MASK, + .type = CRYPTO_ALG_TYPE_KPP, + .tfmsize = offsetof(struct crypto_kpp, base), +}; + +struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask) +{ + return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask); +} +EXPORT_SYMBOL_GPL(crypto_alloc_kpp); + +int crypto_grab_kpp(struct crypto_kpp_spawn *spawn, + struct crypto_instance *inst, + const char *name, u32 type, u32 mask) +{ + spawn->base.frontend = &crypto_kpp_type; + return crypto_grab_spawn(&spawn->base, inst, name, type, mask); +} +EXPORT_SYMBOL_GPL(crypto_grab_kpp); + +int crypto_has_kpp(const char *alg_name, u32 type, u32 mask) +{ + return crypto_type_has_alg(alg_name, &crypto_kpp_type, type, mask); +} +EXPORT_SYMBOL_GPL(crypto_has_kpp); + +static void kpp_prepare_alg(struct kpp_alg *alg) +{ + struct crypto_istat_kpp *istat = kpp_get_stat(alg); + struct crypto_alg *base = &alg->base; + + base->cra_type = &crypto_kpp_type; + base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; + base->cra_flags |= CRYPTO_ALG_TYPE_KPP; + + if (IS_ENABLED(CONFIG_CRYPTO_STATS)) + memset(istat, 0, sizeof(*istat)); +} + +int crypto_register_kpp(struct kpp_alg *alg) +{ + struct crypto_alg *base = &alg->base; + + kpp_prepare_alg(alg); + return crypto_register_alg(base); +} +EXPORT_SYMBOL_GPL(crypto_register_kpp); + +void crypto_unregister_kpp(struct kpp_alg *alg) +{ + crypto_unregister_alg(&alg->base); +} +EXPORT_SYMBOL_GPL(crypto_unregister_kpp); + +int kpp_register_instance(struct crypto_template *tmpl, + struct kpp_instance *inst) +{ + if (WARN_ON(!inst->free)) + return -EINVAL; + + kpp_prepare_alg(&inst->alg); + + return crypto_register_instance(tmpl, kpp_crypto_instance(inst)); +} +EXPORT_SYMBOL_GPL(kpp_register_instance); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Key-agreement Protocol Primitives"); |