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