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