crypto/crypto_user_stat.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Crypto user configuration API.
   4  *
   5  * Copyright (C) 2017-2018 Corentin Labbe <clabbe@baylibre.com>
   6  *
   7  */
   8
   9 #include <linux/crypto.h>
  10 #include <linux/cryptouser.h>
  11 #include <linux/sched.h>
  12 #include <net/netlink.h>
  13 #include <crypto/internal/skcipher.h>
  14 #include <crypto/internal/rng.h>
  15 #include <crypto/akcipher.h>
  16 #include <crypto/kpp.h>
  17 #include <crypto/internal/cryptouser.h>
  18
  19 #include "internal.h"
  20
  21 #define null_terminated(x)      (strnlen(x, sizeof(x)) < sizeof(x))
  22
  23 static DEFINE_MUTEX(crypto_cfg_mutex);
  24
  25 extern struct sock *crypto_nlsk;
  26
  27 struct crypto_dump_info {
  28         struct sk_buff *in_skb;
  29         struct sk_buff *out_skb;
  30         u32 nlmsg_seq;
  31         u16 nlmsg_flags;
  32 };
  33
  34 static int crypto_report_aead(struct sk_buff *skb, struct crypto_alg *alg)
  35 {
  36         struct crypto_stat_aead raead;
  37
  38         memset(&raead, 0, sizeof(raead));
  39
  40         strscpy(raead.type, "aead", sizeof(raead.type));
  41
  42         raead.stat_encrypt_cnt = atomic64_read(&alg->stats.aead.encrypt_cnt);
  43         raead.stat_encrypt_tlen = atomic64_read(&alg->stats.aead.encrypt_tlen);
  44         raead.stat_decrypt_cnt = atomic64_read(&alg->stats.aead.decrypt_cnt);
  45         raead.stat_decrypt_tlen = atomic64_read(&alg->stats.aead.decrypt_tlen);
  46         raead.stat_err_cnt = atomic64_read(&alg->stats.aead.err_cnt);
  47
  48         return nla_put(skb, CRYPTOCFGA_STAT_AEAD, sizeof(raead), &raead);
  49 }
  50
  51 static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg)
  52 {
  53         struct crypto_stat_cipher rcipher;
  54
  55         memset(&rcipher, 0, sizeof(rcipher));
  56
  57         strscpy(rcipher.type, "cipher", sizeof(rcipher.type));
  58
  59         rcipher.stat_encrypt_cnt = atomic64_read(&alg->stats.cipher.encrypt_cnt);
  60         rcipher.stat_encrypt_tlen = atomic64_read(&alg->stats.cipher.encrypt_tlen);
  61         rcipher.stat_decrypt_cnt =  atomic64_read(&alg->stats.cipher.decrypt_cnt);
  62         rcipher.stat_decrypt_tlen = atomic64_read(&alg->stats.cipher.decrypt_tlen);
  63         rcipher.stat_err_cnt =  atomic64_read(&alg->stats.cipher.err_cnt);
  64
  65         return nla_put(skb, CRYPTOCFGA_STAT_CIPHER, sizeof(rcipher), &rcipher);
  66 }
  67
  68 static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg)
  69 {
  70         struct crypto_stat_compress rcomp;
  71
  72         memset(&rcomp, 0, sizeof(rcomp));
  73
  74         strscpy(rcomp.type, "compression", sizeof(rcomp.type));
  75         rcomp.stat_compress_cnt = atomic64_read(&alg->stats.compress.compress_cnt);
  76         rcomp.stat_compress_tlen = atomic64_read(&alg->stats.compress.compress_tlen);
  77         rcomp.stat_decompress_cnt = atomic64_read(&alg->stats.compress.decompress_cnt);
  78         rcomp.stat_decompress_tlen = atomic64_read(&alg->stats.compress.decompress_tlen);
  79         rcomp.stat_err_cnt = atomic64_read(&alg->stats.compress.err_cnt);
  80
  81         return nla_put(skb, CRYPTOCFGA_STAT_COMPRESS, sizeof(rcomp), &rcomp);
  82 }
  83
  84 static int crypto_report_acomp(struct sk_buff *skb, struct crypto_alg *alg)
  85 {
  86         struct crypto_stat_compress racomp;
  87
  88         memset(&racomp, 0, sizeof(racomp));
  89
  90         strscpy(racomp.type, "acomp", sizeof(racomp.type));
  91         racomp.stat_compress_cnt = atomic64_read(&alg->stats.compress.compress_cnt);
  92         racomp.stat_compress_tlen = atomic64_read(&alg->stats.compress.compress_tlen);
  93         racomp.stat_decompress_cnt =  atomic64_read(&alg->stats.compress.decompress_cnt);
  94         racomp.stat_decompress_tlen = atomic64_read(&alg->stats.compress.decompress_tlen);
  95         racomp.stat_err_cnt = atomic64_read(&alg->stats.compress.err_cnt);
  96
  97         return nla_put(skb, CRYPTOCFGA_STAT_ACOMP, sizeof(racomp), &racomp);
  98 }
  99
 100 static int crypto_report_akcipher(struct sk_buff *skb, struct crypto_alg *alg)
 101 {
 102         struct crypto_stat_akcipher rakcipher;
 103
 104         memset(&rakcipher, 0, sizeof(rakcipher));
 105
 106         strscpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
 107         rakcipher.stat_encrypt_cnt = atomic64_read(&alg->stats.akcipher.encrypt_cnt);
 108         rakcipher.stat_encrypt_tlen = atomic64_read(&alg->stats.akcipher.encrypt_tlen);
 109         rakcipher.stat_decrypt_cnt = atomic64_read(&alg->stats.akcipher.decrypt_cnt);
 110         rakcipher.stat_decrypt_tlen = atomic64_read(&alg->stats.akcipher.decrypt_tlen);
 111         rakcipher.stat_sign_cnt = atomic64_read(&alg->stats.akcipher.sign_cnt);
 112         rakcipher.stat_verify_cnt = atomic64_read(&alg->stats.akcipher.verify_cnt);
 113         rakcipher.stat_err_cnt = atomic64_read(&alg->stats.akcipher.err_cnt);
 114
 115         return nla_put(skb, CRYPTOCFGA_STAT_AKCIPHER,
 116                        sizeof(rakcipher), &rakcipher);
 117 }
 118
 119 static int crypto_report_kpp(struct sk_buff *skb, struct crypto_alg *alg)
 120 {
 121         struct crypto_stat_kpp rkpp;
 122
 123         memset(&rkpp, 0, sizeof(rkpp));
 124
 125         strscpy(rkpp.type, "kpp", sizeof(rkpp.type));
 126
 127         rkpp.stat_setsecret_cnt = atomic64_read(&alg->stats.kpp.setsecret_cnt);
 128         rkpp.stat_generate_public_key_cnt = atomic64_read(&alg->stats.kpp.generate_public_key_cnt);
 129         rkpp.stat_compute_shared_secret_cnt = atomic64_read(&alg->stats.kpp.compute_shared_secret_cnt);
 130         rkpp.stat_err_cnt = atomic64_read(&alg->stats.kpp.err_cnt);
 131
 132         return nla_put(skb, CRYPTOCFGA_STAT_KPP, sizeof(rkpp), &rkpp);
 133 }
 134
 135 static int crypto_report_ahash(struct sk_buff *skb, struct crypto_alg *alg)
 136 {
 137         struct crypto_stat_hash rhash;
 138
 139         memset(&rhash, 0, sizeof(rhash));
 140
 141         strscpy(rhash.type, "ahash", sizeof(rhash.type));
 142
 143         rhash.stat_hash_cnt = atomic64_read(&alg->stats.hash.hash_cnt);
 144         rhash.stat_hash_tlen = atomic64_read(&alg->stats.hash.hash_tlen);
 145         rhash.stat_err_cnt = atomic64_read(&alg->stats.hash.err_cnt);
 146
 147         return nla_put(skb, CRYPTOCFGA_STAT_HASH, sizeof(rhash), &rhash);
 148 }
 149
 150 static int crypto_report_shash(struct sk_buff *skb, struct crypto_alg *alg)
 151 {
 152         struct crypto_stat_hash rhash;
 153
 154         memset(&rhash, 0, sizeof(rhash));
 155
 156         strscpy(rhash.type, "shash", sizeof(rhash.type));
 157
 158         rhash.stat_hash_cnt =  atomic64_read(&alg->stats.hash.hash_cnt);
 159         rhash.stat_hash_tlen = atomic64_read(&alg->stats.hash.hash_tlen);
 160         rhash.stat_err_cnt = atomic64_read(&alg->stats.hash.err_cnt);
 161
 162         return nla_put(skb, CRYPTOCFGA_STAT_HASH, sizeof(rhash), &rhash);
 163 }
 164
 165 static int crypto_report_rng(struct sk_buff *skb, struct crypto_alg *alg)
 166 {
 167         struct crypto_stat_rng rrng;
 168
 169         memset(&rrng, 0, sizeof(rrng));
 170
 171         strscpy(rrng.type, "rng", sizeof(rrng.type));
 172
 173         rrng.stat_generate_cnt = atomic64_read(&alg->stats.rng.generate_cnt);
 174         rrng.stat_generate_tlen = atomic64_read(&alg->stats.rng.generate_tlen);
 175         rrng.stat_seed_cnt = atomic64_read(&alg->stats.rng.seed_cnt);
 176         rrng.stat_err_cnt = atomic64_read(&alg->stats.rng.err_cnt);
 177
 178         return nla_put(skb, CRYPTOCFGA_STAT_RNG, sizeof(rrng), &rrng);
 179 }
 180
 181 static int crypto_reportstat_one(struct crypto_alg *alg,
 182                                  struct crypto_user_alg *ualg,
 183                                  struct sk_buff *skb)
 184 {
 185         memset(ualg, 0, sizeof(*ualg));
 186
 187         strscpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name));
 188         strscpy(ualg->cru_driver_name, alg->cra_driver_name,
 189                 sizeof(ualg->cru_driver_name));
 190         strscpy(ualg->cru_module_name, module_name(alg->cra_module),
 191                 sizeof(ualg->cru_module_name));
 192
 193         ualg->cru_type = 0;
 194         ualg->cru_mask = 0;
 195         ualg->cru_flags = alg->cra_flags;
 196         ualg->cru_refcnt = refcount_read(&alg->cra_refcnt);
 197
 198         if (nla_put_u32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority))
 199                 goto nla_put_failure;
 200         if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
 201                 struct crypto_stat_larval rl;
 202
 203                 memset(&rl, 0, sizeof(rl));
 204                 strscpy(rl.type, "larval", sizeof(rl.type));
 205                 if (nla_put(skb, CRYPTOCFGA_STAT_LARVAL, sizeof(rl), &rl))
 206                         goto nla_put_failure;
 207                 goto out;
 208         }
 209
 210         switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
 211         case CRYPTO_ALG_TYPE_AEAD:
 212                 if (crypto_report_aead(skb, alg))
 213                         goto nla_put_failure;
 214                 break;
 215         case CRYPTO_ALG_TYPE_SKCIPHER:
 216                 if (crypto_report_cipher(skb, alg))
 217                         goto nla_put_failure;
 218                 break;
 219         case CRYPTO_ALG_TYPE_BLKCIPHER:
 220                 if (crypto_report_cipher(skb, alg))
 221                         goto nla_put_failure;
 222                 break;
 223         case CRYPTO_ALG_TYPE_CIPHER:
 224                 if (crypto_report_cipher(skb, alg))
 225                         goto nla_put_failure;
 226                 break;
 227         case CRYPTO_ALG_TYPE_COMPRESS:
 228                 if (crypto_report_comp(skb, alg))
 229                         goto nla_put_failure;
 230                 break;
 231         case CRYPTO_ALG_TYPE_ACOMPRESS:
 232                 if (crypto_report_acomp(skb, alg))
 233                         goto nla_put_failure;
 234                 break;
 235         case CRYPTO_ALG_TYPE_SCOMPRESS:
 236                 if (crypto_report_acomp(skb, alg))
 237                         goto nla_put_failure;
 238                 break;
 239         case CRYPTO_ALG_TYPE_AKCIPHER:
 240                 if (crypto_report_akcipher(skb, alg))
 241                         goto nla_put_failure;
 242                 break;
 243         case CRYPTO_ALG_TYPE_KPP:
 244                 if (crypto_report_kpp(skb, alg))
 245                         goto nla_put_failure;
 246                 break;
 247         case CRYPTO_ALG_TYPE_AHASH:
 248                 if (crypto_report_ahash(skb, alg))
 249                         goto nla_put_failure;
 250                 break;
 251         case CRYPTO_ALG_TYPE_HASH:
 252                 if (crypto_report_shash(skb, alg))
 253                         goto nla_put_failure;
 254                 break;
 255         case CRYPTO_ALG_TYPE_RNG:
 256                 if (crypto_report_rng(skb, alg))
 257                         goto nla_put_failure;
 258                 break;
 259         default:
 260                 pr_err("ERROR: Unhandled alg %d in %s\n",
 261                        alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL),
 262                        __func__);
 263         }
 264
 265 out:
 266         return 0;
 267
 268 nla_put_failure:
 269         return -EMSGSIZE;
 270 }
 271
 272 static int crypto_reportstat_alg(struct crypto_alg *alg,
 273                                  struct crypto_dump_info *info)
 274 {
 275         struct sk_buff *in_skb = info->in_skb;
 276         struct sk_buff *skb = info->out_skb;
 277         struct nlmsghdr *nlh;
 278         struct crypto_user_alg *ualg;
 279         int err = 0;
 280
 281         nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, info->nlmsg_seq,
 282                         CRYPTO_MSG_GETSTAT, sizeof(*ualg), info->nlmsg_flags);
 283         if (!nlh) {
 284                 err = -EMSGSIZE;
 285                 goto out;
 286         }
 287
 288         ualg = nlmsg_data(nlh);
 289
 290         err = crypto_reportstat_one(alg, ualg, skb);
 291         if (err) {
 292                 nlmsg_cancel(skb, nlh);
 293                 goto out;
 294         }
 295
 296         nlmsg_end(skb, nlh);
 297
 298 out:
 299         return err;
 300 }
 301
 302 int crypto_reportstat(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
 303                       struct nlattr **attrs)
 304 {
 305         struct crypto_user_alg *p = nlmsg_data(in_nlh);
 306         struct crypto_alg *alg;
 307         struct sk_buff *skb;
 308         struct crypto_dump_info info;
 309         int err;
 310
 311         if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
 312                 return -EINVAL;
 313
 314         alg = crypto_alg_match(p, 0);
 315         if (!alg)
 316                 return -ENOENT;
 317
 318         err = -ENOMEM;
 319         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 320         if (!skb)
 321                 goto drop_alg;
 322
 323         info.in_skb = in_skb;
 324         info.out_skb = skb;
 325         info.nlmsg_seq = in_nlh->nlmsg_seq;
 326         info.nlmsg_flags = 0;
 327
 328         err = crypto_reportstat_alg(alg, &info);
 329
 330 drop_alg:
 331         crypto_mod_put(alg);
 332
 333         if (err)
 334                 return err;
 335
 336         return nlmsg_unicast(crypto_nlsk, skb, NETLINK_CB(in_skb).portid);
 337 }
 338
 339 MODULE_LICENSE("GPL");