1 // SPDX-License-Identifier: GPL-2.0
3 * Crypto user configuration API.
5 * Copyright (C) 2017-2018 Corentin Labbe <clabbe@baylibre.com>
9 #include <linux/crypto.h>
10 #include <linux/cryptouser.h>
11 #include <linux/sched.h>
12 #include <net/netlink.h>
14 #include <crypto/internal/skcipher.h>
15 #include <crypto/internal/rng.h>
16 #include <crypto/akcipher.h>
17 #include <crypto/kpp.h>
18 #include <crypto/internal/cryptouser.h>
22 #define null_terminated(x) (strnlen(x, sizeof(x)) < sizeof(x))
24 struct crypto_dump_info {
25 struct sk_buff *in_skb;
26 struct sk_buff *out_skb;
31 static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg)
33 struct crypto_stat_cipher rcipher;
35 memset(&rcipher, 0, sizeof(rcipher));
37 strscpy(rcipher.type, "cipher", sizeof(rcipher.type));
39 rcipher.stat_encrypt_cnt = atomic64_read(&alg->stats.cipher.encrypt_cnt);
40 rcipher.stat_encrypt_tlen = atomic64_read(&alg->stats.cipher.encrypt_tlen);
41 rcipher.stat_decrypt_cnt = atomic64_read(&alg->stats.cipher.decrypt_cnt);
42 rcipher.stat_decrypt_tlen = atomic64_read(&alg->stats.cipher.decrypt_tlen);
43 rcipher.stat_err_cnt = atomic64_read(&alg->stats.cipher.err_cnt);
45 return nla_put(skb, CRYPTOCFGA_STAT_CIPHER, sizeof(rcipher), &rcipher);
48 static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg)
50 struct crypto_stat_compress rcomp;
52 memset(&rcomp, 0, sizeof(rcomp));
54 strscpy(rcomp.type, "compression", sizeof(rcomp.type));
55 rcomp.stat_compress_cnt = atomic64_read(&alg->stats.compress.compress_cnt);
56 rcomp.stat_compress_tlen = atomic64_read(&alg->stats.compress.compress_tlen);
57 rcomp.stat_decompress_cnt = atomic64_read(&alg->stats.compress.decompress_cnt);
58 rcomp.stat_decompress_tlen = atomic64_read(&alg->stats.compress.decompress_tlen);
59 rcomp.stat_err_cnt = atomic64_read(&alg->stats.compress.err_cnt);
61 return nla_put(skb, CRYPTOCFGA_STAT_COMPRESS, sizeof(rcomp), &rcomp);
64 static int crypto_report_acomp(struct sk_buff *skb, struct crypto_alg *alg)
66 struct crypto_stat_compress racomp;
68 memset(&racomp, 0, sizeof(racomp));
70 strscpy(racomp.type, "acomp", sizeof(racomp.type));
71 racomp.stat_compress_cnt = atomic64_read(&alg->stats.compress.compress_cnt);
72 racomp.stat_compress_tlen = atomic64_read(&alg->stats.compress.compress_tlen);
73 racomp.stat_decompress_cnt = atomic64_read(&alg->stats.compress.decompress_cnt);
74 racomp.stat_decompress_tlen = atomic64_read(&alg->stats.compress.decompress_tlen);
75 racomp.stat_err_cnt = atomic64_read(&alg->stats.compress.err_cnt);
77 return nla_put(skb, CRYPTOCFGA_STAT_ACOMP, sizeof(racomp), &racomp);
80 static int crypto_report_akcipher(struct sk_buff *skb, struct crypto_alg *alg)
82 struct crypto_stat_akcipher rakcipher;
84 memset(&rakcipher, 0, sizeof(rakcipher));
86 strscpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
87 rakcipher.stat_encrypt_cnt = atomic64_read(&alg->stats.akcipher.encrypt_cnt);
88 rakcipher.stat_encrypt_tlen = atomic64_read(&alg->stats.akcipher.encrypt_tlen);
89 rakcipher.stat_decrypt_cnt = atomic64_read(&alg->stats.akcipher.decrypt_cnt);
90 rakcipher.stat_decrypt_tlen = atomic64_read(&alg->stats.akcipher.decrypt_tlen);
91 rakcipher.stat_sign_cnt = atomic64_read(&alg->stats.akcipher.sign_cnt);
92 rakcipher.stat_verify_cnt = atomic64_read(&alg->stats.akcipher.verify_cnt);
93 rakcipher.stat_err_cnt = atomic64_read(&alg->stats.akcipher.err_cnt);
95 return nla_put(skb, CRYPTOCFGA_STAT_AKCIPHER,
96 sizeof(rakcipher), &rakcipher);
99 static int crypto_report_kpp(struct sk_buff *skb, struct crypto_alg *alg)
101 struct crypto_stat_kpp rkpp;
103 memset(&rkpp, 0, sizeof(rkpp));
105 strscpy(rkpp.type, "kpp", sizeof(rkpp.type));
107 rkpp.stat_setsecret_cnt = atomic64_read(&alg->stats.kpp.setsecret_cnt);
108 rkpp.stat_generate_public_key_cnt = atomic64_read(&alg->stats.kpp.generate_public_key_cnt);
109 rkpp.stat_compute_shared_secret_cnt = atomic64_read(&alg->stats.kpp.compute_shared_secret_cnt);
110 rkpp.stat_err_cnt = atomic64_read(&alg->stats.kpp.err_cnt);
112 return nla_put(skb, CRYPTOCFGA_STAT_KPP, sizeof(rkpp), &rkpp);
115 static int crypto_report_ahash(struct sk_buff *skb, struct crypto_alg *alg)
117 struct crypto_stat_hash rhash;
119 memset(&rhash, 0, sizeof(rhash));
121 strscpy(rhash.type, "ahash", sizeof(rhash.type));
123 rhash.stat_hash_cnt = atomic64_read(&alg->stats.hash.hash_cnt);
124 rhash.stat_hash_tlen = atomic64_read(&alg->stats.hash.hash_tlen);
125 rhash.stat_err_cnt = atomic64_read(&alg->stats.hash.err_cnt);
127 return nla_put(skb, CRYPTOCFGA_STAT_HASH, sizeof(rhash), &rhash);
130 static int crypto_report_shash(struct sk_buff *skb, struct crypto_alg *alg)
132 struct crypto_stat_hash rhash;
134 memset(&rhash, 0, sizeof(rhash));
136 strscpy(rhash.type, "shash", sizeof(rhash.type));
138 rhash.stat_hash_cnt = atomic64_read(&alg->stats.hash.hash_cnt);
139 rhash.stat_hash_tlen = atomic64_read(&alg->stats.hash.hash_tlen);
140 rhash.stat_err_cnt = atomic64_read(&alg->stats.hash.err_cnt);
142 return nla_put(skb, CRYPTOCFGA_STAT_HASH, sizeof(rhash), &rhash);
145 static int crypto_report_rng(struct sk_buff *skb, struct crypto_alg *alg)
147 struct crypto_stat_rng rrng;
149 memset(&rrng, 0, sizeof(rrng));
151 strscpy(rrng.type, "rng", sizeof(rrng.type));
153 rrng.stat_generate_cnt = atomic64_read(&alg->stats.rng.generate_cnt);
154 rrng.stat_generate_tlen = atomic64_read(&alg->stats.rng.generate_tlen);
155 rrng.stat_seed_cnt = atomic64_read(&alg->stats.rng.seed_cnt);
156 rrng.stat_err_cnt = atomic64_read(&alg->stats.rng.err_cnt);
158 return nla_put(skb, CRYPTOCFGA_STAT_RNG, sizeof(rrng), &rrng);
161 static int crypto_reportstat_one(struct crypto_alg *alg,
162 struct crypto_user_alg *ualg,
165 memset(ualg, 0, sizeof(*ualg));
167 strscpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name));
168 strscpy(ualg->cru_driver_name, alg->cra_driver_name,
169 sizeof(ualg->cru_driver_name));
170 strscpy(ualg->cru_module_name, module_name(alg->cra_module),
171 sizeof(ualg->cru_module_name));
175 ualg->cru_flags = alg->cra_flags;
176 ualg->cru_refcnt = refcount_read(&alg->cra_refcnt);
178 if (nla_put_u32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority))
179 goto nla_put_failure;
180 if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
181 struct crypto_stat_larval rl;
183 memset(&rl, 0, sizeof(rl));
184 strscpy(rl.type, "larval", sizeof(rl.type));
185 if (nla_put(skb, CRYPTOCFGA_STAT_LARVAL, sizeof(rl), &rl))
186 goto nla_put_failure;
190 if (alg->cra_type && alg->cra_type->report_stat) {
191 if (alg->cra_type->report_stat(skb, alg))
192 goto nla_put_failure;
196 switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
197 case CRYPTO_ALG_TYPE_SKCIPHER:
198 if (crypto_report_cipher(skb, alg))
199 goto nla_put_failure;
201 case CRYPTO_ALG_TYPE_CIPHER:
202 if (crypto_report_cipher(skb, alg))
203 goto nla_put_failure;
205 case CRYPTO_ALG_TYPE_COMPRESS:
206 if (crypto_report_comp(skb, alg))
207 goto nla_put_failure;
209 case CRYPTO_ALG_TYPE_ACOMPRESS:
210 if (crypto_report_acomp(skb, alg))
211 goto nla_put_failure;
213 case CRYPTO_ALG_TYPE_SCOMPRESS:
214 if (crypto_report_acomp(skb, alg))
215 goto nla_put_failure;
217 case CRYPTO_ALG_TYPE_AKCIPHER:
218 if (crypto_report_akcipher(skb, alg))
219 goto nla_put_failure;
221 case CRYPTO_ALG_TYPE_KPP:
222 if (crypto_report_kpp(skb, alg))
223 goto nla_put_failure;
225 case CRYPTO_ALG_TYPE_AHASH:
226 if (crypto_report_ahash(skb, alg))
227 goto nla_put_failure;
229 case CRYPTO_ALG_TYPE_HASH:
230 if (crypto_report_shash(skb, alg))
231 goto nla_put_failure;
233 case CRYPTO_ALG_TYPE_RNG:
234 if (crypto_report_rng(skb, alg))
235 goto nla_put_failure;
238 pr_err("ERROR: Unhandled alg %d in %s\n",
239 alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL),
250 static int crypto_reportstat_alg(struct crypto_alg *alg,
251 struct crypto_dump_info *info)
253 struct sk_buff *in_skb = info->in_skb;
254 struct sk_buff *skb = info->out_skb;
255 struct nlmsghdr *nlh;
256 struct crypto_user_alg *ualg;
259 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, info->nlmsg_seq,
260 CRYPTO_MSG_GETSTAT, sizeof(*ualg), info->nlmsg_flags);
266 ualg = nlmsg_data(nlh);
268 err = crypto_reportstat_one(alg, ualg, skb);
270 nlmsg_cancel(skb, nlh);
280 int crypto_reportstat(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
281 struct nlattr **attrs)
283 struct net *net = sock_net(in_skb->sk);
284 struct crypto_user_alg *p = nlmsg_data(in_nlh);
285 struct crypto_alg *alg;
287 struct crypto_dump_info info;
290 if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
293 alg = crypto_alg_match(p, 0);
298 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
302 info.in_skb = in_skb;
304 info.nlmsg_seq = in_nlh->nlmsg_seq;
305 info.nlmsg_flags = 0;
307 err = crypto_reportstat_alg(alg, &info);
317 return nlmsg_unicast(net->crypto_nlsk, skb, NETLINK_CB(in_skb).portid);
320 MODULE_LICENSE("GPL");