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 <[email protected]>
   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 raead;
  37         u64 v64;
  38         u32 v32;
  39
  40         memset(&raead, 0, sizeof(raead));
  41
  42         strncpy(raead.type, "aead", sizeof(raead.type));
  43
  44         v32 = atomic_read(&alg->encrypt_cnt);
  45         raead.stat_encrypt_cnt = v32;
  46         v64 = atomic64_read(&alg->encrypt_tlen);
  47         raead.stat_encrypt_tlen = v64;
  48         v32 = atomic_read(&alg->decrypt_cnt);
  49         raead.stat_decrypt_cnt = v32;
  50         v64 = atomic64_read(&alg->decrypt_tlen);
  51         raead.stat_decrypt_tlen = v64;
  52         v32 = atomic_read(&alg->aead_err_cnt);
  53         raead.stat_aead_err_cnt = v32;
  54
  55         if (nla_put(skb, CRYPTOCFGA_STAT_AEAD,
  56                     sizeof(struct crypto_stat), &raead))
  57                 goto nla_put_failure;
  58         return 0;
  59
  60 nla_put_failure:
  61         return -EMSGSIZE;
  62 }
  63
  64 static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg)
  65 {
  66         struct crypto_stat rcipher;
  67         u64 v64;
  68         u32 v32;
  69
  70         memset(&rcipher, 0, sizeof(rcipher));
  71
  72         strlcpy(rcipher.type, "cipher", sizeof(rcipher.type));
  73
  74         v32 = atomic_read(&alg->encrypt_cnt);
  75         rcipher.stat_encrypt_cnt = v32;
  76         v64 = atomic64_read(&alg->encrypt_tlen);
  77         rcipher.stat_encrypt_tlen = v64;
  78         v32 = atomic_read(&alg->decrypt_cnt);
  79         rcipher.stat_decrypt_cnt = v32;
  80         v64 = atomic64_read(&alg->decrypt_tlen);
  81         rcipher.stat_decrypt_tlen = v64;
  82         v32 = atomic_read(&alg->cipher_err_cnt);
  83         rcipher.stat_cipher_err_cnt = v32;
  84
  85         if (nla_put(skb, CRYPTOCFGA_STAT_CIPHER,
  86                     sizeof(struct crypto_stat), &rcipher))
  87                 goto nla_put_failure;
  88         return 0;
  89
  90 nla_put_failure:
  91         return -EMSGSIZE;
  92 }
  93
  94 static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg)
  95 {
  96         struct crypto_stat rcomp;
  97         u64 v64;
  98         u32 v32;
  99
 100         memset(&rcomp, 0, sizeof(rcomp));
 101
 102         strlcpy(rcomp.type, "compression", sizeof(rcomp.type));
 103         v32 = atomic_read(&alg->compress_cnt);
 104         rcomp.stat_compress_cnt = v32;
 105         v64 = atomic64_read(&alg->compress_tlen);
 106         rcomp.stat_compress_tlen = v64;
 107         v32 = atomic_read(&alg->decompress_cnt);
 108         rcomp.stat_decompress_cnt = v32;
 109         v64 = atomic64_read(&alg->decompress_tlen);
 110         rcomp.stat_decompress_tlen = v64;
 111         v32 = atomic_read(&alg->cipher_err_cnt);
 112         rcomp.stat_compress_err_cnt = v32;
 113
 114         if (nla_put(skb, CRYPTOCFGA_STAT_COMPRESS,
 115                     sizeof(struct crypto_stat), &rcomp))
 116                 goto nla_put_failure;
 117         return 0;
 118
 119 nla_put_failure:
 120         return -EMSGSIZE;
 121 }
 122
 123 static int crypto_report_acomp(struct sk_buff *skb, struct crypto_alg *alg)
 124 {
 125         struct crypto_stat racomp;
 126         u64 v64;
 127         u32 v32;
 128
 129         memset(&racomp, 0, sizeof(racomp));
 130
 131         strlcpy(racomp.type, "acomp", sizeof(racomp.type));
 132         v32 = atomic_read(&alg->compress_cnt);
 133         racomp.stat_compress_cnt = v32;
 134         v64 = atomic64_read(&alg->compress_tlen);
 135         racomp.stat_compress_tlen = v64;
 136         v32 = atomic_read(&alg->decompress_cnt);
 137         racomp.stat_decompress_cnt = v32;
 138         v64 = atomic64_read(&alg->decompress_tlen);
 139         racomp.stat_decompress_tlen = v64;
 140         v32 = atomic_read(&alg->cipher_err_cnt);
 141         racomp.stat_compress_err_cnt = v32;
 142
 143         if (nla_put(skb, CRYPTOCFGA_STAT_ACOMP,
 144                     sizeof(struct crypto_stat), &racomp))
 145                 goto nla_put_failure;
 146         return 0;
 147
 148 nla_put_failure:
 149         return -EMSGSIZE;
 150 }
 151
 152 static int crypto_report_akcipher(struct sk_buff *skb, struct crypto_alg *alg)
 153 {
 154         struct crypto_stat rakcipher;
 155         u64 v64;
 156         u32 v32;
 157
 158         memset(&rakcipher, 0, sizeof(rakcipher));
 159
 160         strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
 161         v32 = atomic_read(&alg->encrypt_cnt);
 162         rakcipher.stat_encrypt_cnt = v32;
 163         v64 = atomic64_read(&alg->encrypt_tlen);
 164         rakcipher.stat_encrypt_tlen = v64;
 165         v32 = atomic_read(&alg->decrypt_cnt);
 166         rakcipher.stat_decrypt_cnt = v32;
 167         v64 = atomic64_read(&alg->decrypt_tlen);
 168         rakcipher.stat_decrypt_tlen = v64;
 169         v32 = atomic_read(&alg->sign_cnt);
 170         rakcipher.stat_sign_cnt = v32;
 171         v32 = atomic_read(&alg->verify_cnt);
 172         rakcipher.stat_verify_cnt = v32;
 173         v32 = atomic_read(&alg->akcipher_err_cnt);
 174         rakcipher.stat_akcipher_err_cnt = v32;
 175
 176         if (nla_put(skb, CRYPTOCFGA_STAT_AKCIPHER,
 177                     sizeof(struct crypto_stat), &rakcipher))
 178                 goto nla_put_failure;
 179         return 0;
 180
 181 nla_put_failure:
 182         return -EMSGSIZE;
 183 }
 184
 185 static int crypto_report_kpp(struct sk_buff *skb, struct crypto_alg *alg)
 186 {
 187         struct crypto_stat rkpp;
 188         u32 v;
 189
 190         memset(&rkpp, 0, sizeof(rkpp));
 191
 192         strlcpy(rkpp.type, "kpp", sizeof(rkpp.type));
 193
 194         v = atomic_read(&alg->setsecret_cnt);
 195         rkpp.stat_setsecret_cnt = v;
 196         v = atomic_read(&alg->generate_public_key_cnt);
 197         rkpp.stat_generate_public_key_cnt = v;
 198         v = atomic_read(&alg->compute_shared_secret_cnt);
 199         rkpp.stat_compute_shared_secret_cnt = v;
 200         v = atomic_read(&alg->kpp_err_cnt);
 201         rkpp.stat_kpp_err_cnt = v;
 202
 203         if (nla_put(skb, CRYPTOCFGA_STAT_KPP,
 204                     sizeof(struct crypto_stat), &rkpp))
 205                 goto nla_put_failure;
 206         return 0;
 207
 208 nla_put_failure:
 209         return -EMSGSIZE;
 210 }
 211
 212 static int crypto_report_ahash(struct sk_buff *skb, struct crypto_alg *alg)
 213 {
 214         struct crypto_stat rhash;
 215         u64 v64;
 216         u32 v32;
 217
 218         memset(&rhash, 0, sizeof(rhash));
 219
 220         strncpy(rhash.type, "ahash", sizeof(rhash.type));
 221
 222         v32 = atomic_read(&alg->hash_cnt);
 223         rhash.stat_hash_cnt = v32;
 224         v64 = atomic64_read(&alg->hash_tlen);
 225         rhash.stat_hash_tlen = v64;
 226         v32 = atomic_read(&alg->hash_err_cnt);
 227         rhash.stat_hash_err_cnt = v32;
 228
 229         if (nla_put(skb, CRYPTOCFGA_STAT_HASH,
 230                     sizeof(struct crypto_stat), &rhash))
 231                 goto nla_put_failure;
 232         return 0;
 233
 234 nla_put_failure:
 235         return -EMSGSIZE;
 236 }
 237
 238 static int crypto_report_shash(struct sk_buff *skb, struct crypto_alg *alg)
 239 {
 240         struct crypto_stat rhash;
 241         u64 v64;
 242         u32 v32;
 243
 244         memset(&rhash, 0, sizeof(rhash));
 245
 246         strncpy(rhash.type, "shash", sizeof(rhash.type));
 247
 248         v32 = atomic_read(&alg->hash_cnt);
 249         rhash.stat_hash_cnt = v32;
 250         v64 = atomic64_read(&alg->hash_tlen);
 251         rhash.stat_hash_tlen = v64;
 252         v32 = atomic_read(&alg->hash_err_cnt);
 253         rhash.stat_hash_err_cnt = v32;
 254
 255         if (nla_put(skb, CRYPTOCFGA_STAT_HASH,
 256                     sizeof(struct crypto_stat), &rhash))
 257                 goto nla_put_failure;
 258         return 0;
 259
 260 nla_put_failure:
 261         return -EMSGSIZE;
 262 }
 263
 264 static int crypto_report_rng(struct sk_buff *skb, struct crypto_alg *alg)
 265 {
 266         struct crypto_stat rrng;
 267         u64 v64;
 268         u32 v32;
 269
 270         memset(&rrng, 0, sizeof(rrng));
 271
 272         strncpy(rrng.type, "rng", sizeof(rrng.type));
 273
 274         v32 = atomic_read(&alg->generate_cnt);
 275         rrng.stat_generate_cnt = v32;
 276         v64 = atomic64_read(&alg->generate_tlen);
 277         rrng.stat_generate_tlen = v64;
 278         v32 = atomic_read(&alg->seed_cnt);
 279         rrng.stat_seed_cnt = v32;
 280         v32 = atomic_read(&alg->hash_err_cnt);
 281         rrng.stat_rng_err_cnt = v32;
 282
 283         if (nla_put(skb, CRYPTOCFGA_STAT_RNG,
 284                     sizeof(struct crypto_stat), &rrng))
 285                 goto nla_put_failure;
 286         return 0;
 287
 288 nla_put_failure:
 289         return -EMSGSIZE;
 290 }
 291
 292 static int crypto_reportstat_one(struct crypto_alg *alg,
 293                                  struct crypto_user_alg *ualg,
 294                                  struct sk_buff *skb)
 295 {
 296         memset(ualg, 0, sizeof(*ualg));
 297
 298         strlcpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name));
 299         strlcpy(ualg->cru_driver_name, alg->cra_driver_name,
 300                 sizeof(ualg->cru_driver_name));
 301         strlcpy(ualg->cru_module_name, module_name(alg->cra_module),
 302                 sizeof(ualg->cru_module_name));
 303
 304         ualg->cru_type = 0;
 305         ualg->cru_mask = 0;
 306         ualg->cru_flags = alg->cra_flags;
 307         ualg->cru_refcnt = refcount_read(&alg->cra_refcnt);
 308
 309         if (nla_put_u32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority))
 310                 goto nla_put_failure;
 311         if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
 312                 struct crypto_stat rl;
 313
 314                 memset(&rl, 0, sizeof(rl));
 315                 strlcpy(rl.type, "larval", sizeof(rl.type));
 316                 if (nla_put(skb, CRYPTOCFGA_STAT_LARVAL,
 317                             sizeof(struct crypto_stat), &rl))
 318                         goto nla_put_failure;
 319                 goto out;
 320         }
 321
 322         switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
 323         case CRYPTO_ALG_TYPE_AEAD:
 324                 if (crypto_report_aead(skb, alg))
 325                         goto nla_put_failure;
 326                 break;
 327         case CRYPTO_ALG_TYPE_SKCIPHER:
 328                 if (crypto_report_cipher(skb, alg))
 329                         goto nla_put_failure;
 330                 break;
 331         case CRYPTO_ALG_TYPE_BLKCIPHER:
 332                 if (crypto_report_cipher(skb, alg))
 333                         goto nla_put_failure;
 334                 break;
 335         case CRYPTO_ALG_TYPE_CIPHER:
 336                 if (crypto_report_cipher(skb, alg))
 337                         goto nla_put_failure;
 338                 break;
 339         case CRYPTO_ALG_TYPE_COMPRESS:
 340                 if (crypto_report_comp(skb, alg))
 341                         goto nla_put_failure;
 342                 break;
 343         case CRYPTO_ALG_TYPE_ACOMPRESS:
 344                 if (crypto_report_acomp(skb, alg))
 345                         goto nla_put_failure;
 346                 break;
 347         case CRYPTO_ALG_TYPE_SCOMPRESS:
 348                 if (crypto_report_acomp(skb, alg))
 349                         goto nla_put_failure;
 350                 break;
 351         case CRYPTO_ALG_TYPE_AKCIPHER:
 352                 if (crypto_report_akcipher(skb, alg))
 353                         goto nla_put_failure;
 354                 break;
 355         case CRYPTO_ALG_TYPE_KPP:
 356                 if (crypto_report_kpp(skb, alg))
 357                         goto nla_put_failure;
 358                 break;
 359         case CRYPTO_ALG_TYPE_AHASH:
 360                 if (crypto_report_ahash(skb, alg))
 361                         goto nla_put_failure;
 362                 break;
 363         case CRYPTO_ALG_TYPE_HASH:
 364                 if (crypto_report_shash(skb, alg))
 365                         goto nla_put_failure;
 366                 break;
 367         case CRYPTO_ALG_TYPE_RNG:
 368                 if (crypto_report_rng(skb, alg))
 369                         goto nla_put_failure;
 370                 break;
 371         default:
 372                 pr_err("ERROR: Unhandled alg %d in %s\n",
 373                        alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL),
 374                        __func__);
 375         }
 376
 377 out:
 378         return 0;
 379
 380 nla_put_failure:
 381         return -EMSGSIZE;
 382 }
 383
 384 static int crypto_reportstat_alg(struct crypto_alg *alg,
 385                                  struct crypto_dump_info *info)
 386 {
 387         struct sk_buff *in_skb = info->in_skb;
 388         struct sk_buff *skb = info->out_skb;
 389         struct nlmsghdr *nlh;
 390         struct crypto_user_alg *ualg;
 391         int err = 0;
 392
 393         nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, info->nlmsg_seq,
 394                         CRYPTO_MSG_GETSTAT, sizeof(*ualg), info->nlmsg_flags);
 395         if (!nlh) {
 396                 err = -EMSGSIZE;
 397                 goto out;
 398         }
 399
 400         ualg = nlmsg_data(nlh);
 401
 402         err = crypto_reportstat_one(alg, ualg, skb);
 403         if (err) {
 404                 nlmsg_cancel(skb, nlh);
 405                 goto out;
 406         }
 407
 408         nlmsg_end(skb, nlh);
 409
 410 out:
 411         return err;
 412 }
 413
 414 int crypto_reportstat(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
 415                       struct nlattr **attrs)
 416 {
 417         struct crypto_user_alg *p = nlmsg_data(in_nlh);
 418         struct crypto_alg *alg;
 419         struct sk_buff *skb;
 420         struct crypto_dump_info info;
 421         int err;
 422
 423         if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
 424                 return -EINVAL;
 425
 426         alg = crypto_alg_match(p, 0);
 427         if (!alg)
 428                 return -ENOENT;
 429
 430         err = -ENOMEM;
 431         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 432         if (!skb)
 433                 goto drop_alg;
 434
 435         info.in_skb = in_skb;
 436         info.out_skb = skb;
 437         info.nlmsg_seq = in_nlh->nlmsg_seq;
 438         info.nlmsg_flags = 0;
 439
 440         err = crypto_reportstat_alg(alg, &info);
 441
 442 drop_alg:
 443         crypto_mod_put(alg);
 444
 445         if (err)
 446                 return err;
 447
 448         return nlmsg_unicast(crypto_nlsk, skb, NETLINK_CB(in_skb).portid);
 449 }
 450
 451 int crypto_dump_reportstat(struct sk_buff *skb, struct netlink_callback *cb)
 452 {
 453         struct crypto_alg *alg;
 454         struct crypto_dump_info info;
 455         int err;
 456
 457         if (cb->args[0])
 458                 goto out;
 459
 460         cb->args[0] = 1;
 461
 462         info.in_skb = cb->skb;
 463         info.out_skb = skb;
 464         info.nlmsg_seq = cb->nlh->nlmsg_seq;
 465         info.nlmsg_flags = NLM_F_MULTI;
 466
 467         list_for_each_entry(alg, &crypto_alg_list, cra_list) {
 468                 err = crypto_reportstat_alg(alg, &info);
 469                 if (err)
 470                         goto out_err;
 471         }
 472
 473 out:
 474         return skb->len;
 475 out_err:
 476         return err;
 477 }
 478
 479 int crypto_dump_reportstat_done(struct netlink_callback *cb)
 480 {
 481         return 0;
 482 }
 483
 484 MODULE_LICENSE("GPL");