1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Key-agreement Protocol Primitives (KPP) 4 * 5 * Copyright (c) 2016, Intel Corporation 6 * Authors: Salvatore Benedetto <salvatore.benedetto@intel.com> 7 */ 8 9 #include <crypto/internal/kpp.h> 10 #include <linux/cryptouser.h> 11 #include <linux/errno.h> 12 #include <linux/kernel.h> 13 #include <linux/module.h> 14 #include <linux/seq_file.h> 15 #include <linux/string.h> 16 #include <net/netlink.h> 17 18 #include "internal.h" 19 20 static int __maybe_unused crypto_kpp_report( 21 struct sk_buff *skb, struct crypto_alg *alg) 22 { 23 struct crypto_report_kpp rkpp; 24 25 memset(&rkpp, 0, sizeof(rkpp)); 26 27 strscpy(rkpp.type, "kpp", sizeof(rkpp.type)); 28 29 return nla_put(skb, CRYPTOCFGA_REPORT_KPP, sizeof(rkpp), &rkpp); 30 } 31 32 static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg) 33 __maybe_unused; 34 35 static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg) 36 { 37 seq_puts(m, "type : kpp\n"); 38 } 39 40 static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm) 41 { 42 struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm); 43 struct kpp_alg *alg = crypto_kpp_alg(kpp); 44 45 alg->exit(kpp); 46 } 47 48 static int crypto_kpp_init_tfm(struct crypto_tfm *tfm) 49 { 50 struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm); 51 struct kpp_alg *alg = crypto_kpp_alg(kpp); 52 53 if (alg->exit) 54 kpp->base.exit = crypto_kpp_exit_tfm; 55 56 if (alg->init) 57 return alg->init(kpp); 58 59 return 0; 60 } 61 62 static void crypto_kpp_free_instance(struct crypto_instance *inst) 63 { 64 struct kpp_instance *kpp = kpp_instance(inst); 65 66 kpp->free(kpp); 67 } 68 69 static int __maybe_unused crypto_kpp_report_stat( 70 struct sk_buff *skb, struct crypto_alg *alg) 71 { 72 struct kpp_alg *kpp = __crypto_kpp_alg(alg); 73 struct crypto_istat_kpp *istat; 74 struct crypto_stat_kpp rkpp; 75 76 istat = kpp_get_stat(kpp); 77 78 memset(&rkpp, 0, sizeof(rkpp)); 79 80 strscpy(rkpp.type, "kpp", sizeof(rkpp.type)); 81 82 rkpp.stat_setsecret_cnt = atomic64_read(&istat->setsecret_cnt); 83 rkpp.stat_generate_public_key_cnt = 84 atomic64_read(&istat->generate_public_key_cnt); 85 rkpp.stat_compute_shared_secret_cnt = 86 atomic64_read(&istat->compute_shared_secret_cnt); 87 rkpp.stat_err_cnt = atomic64_read(&istat->err_cnt); 88 89 return nla_put(skb, CRYPTOCFGA_STAT_KPP, sizeof(rkpp), &rkpp); 90 } 91 92 static const struct crypto_type crypto_kpp_type = { 93 .extsize = crypto_alg_extsize, 94 .init_tfm = crypto_kpp_init_tfm, 95 .free = crypto_kpp_free_instance, 96 #ifdef CONFIG_PROC_FS 97 .show = crypto_kpp_show, 98 #endif 99 #if IS_ENABLED(CONFIG_CRYPTO_USER) 100 .report = crypto_kpp_report, 101 #endif 102 #ifdef CONFIG_CRYPTO_STATS 103 .report_stat = crypto_kpp_report_stat, 104 #endif 105 .maskclear = ~CRYPTO_ALG_TYPE_MASK, 106 .maskset = CRYPTO_ALG_TYPE_MASK, 107 .type = CRYPTO_ALG_TYPE_KPP, 108 .tfmsize = offsetof(struct crypto_kpp, base), 109 }; 110 111 struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask) 112 { 113 return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask); 114 } 115 EXPORT_SYMBOL_GPL(crypto_alloc_kpp); 116 117 int crypto_grab_kpp(struct crypto_kpp_spawn *spawn, 118 struct crypto_instance *inst, 119 const char *name, u32 type, u32 mask) 120 { 121 spawn->base.frontend = &crypto_kpp_type; 122 return crypto_grab_spawn(&spawn->base, inst, name, type, mask); 123 } 124 EXPORT_SYMBOL_GPL(crypto_grab_kpp); 125 126 int crypto_has_kpp(const char *alg_name, u32 type, u32 mask) 127 { 128 return crypto_type_has_alg(alg_name, &crypto_kpp_type, type, mask); 129 } 130 EXPORT_SYMBOL_GPL(crypto_has_kpp); 131 132 static void kpp_prepare_alg(struct kpp_alg *alg) 133 { 134 struct crypto_istat_kpp *istat = kpp_get_stat(alg); 135 struct crypto_alg *base = &alg->base; 136 137 base->cra_type = &crypto_kpp_type; 138 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; 139 base->cra_flags |= CRYPTO_ALG_TYPE_KPP; 140 141 if (IS_ENABLED(CONFIG_CRYPTO_STATS)) 142 memset(istat, 0, sizeof(*istat)); 143 } 144 145 int crypto_register_kpp(struct kpp_alg *alg) 146 { 147 struct crypto_alg *base = &alg->base; 148 149 kpp_prepare_alg(alg); 150 return crypto_register_alg(base); 151 } 152 EXPORT_SYMBOL_GPL(crypto_register_kpp); 153 154 void crypto_unregister_kpp(struct kpp_alg *alg) 155 { 156 crypto_unregister_alg(&alg->base); 157 } 158 EXPORT_SYMBOL_GPL(crypto_unregister_kpp); 159 160 int kpp_register_instance(struct crypto_template *tmpl, 161 struct kpp_instance *inst) 162 { 163 if (WARN_ON(!inst->free)) 164 return -EINVAL; 165 166 kpp_prepare_alg(&inst->alg); 167 168 return crypto_register_instance(tmpl, kpp_crypto_instance(inst)); 169 } 170 EXPORT_SYMBOL_GPL(kpp_register_instance); 171 172 MODULE_LICENSE("GPL"); 173 MODULE_DESCRIPTION("Key-agreement Protocol Primitives"); 174