xref: /openbmc/linux/crypto/crypto_user_stat.c (revision 69fad28c) 
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");
340