xref: /openbmc/linux/crypto/crypto_user_stat.c (revision f125e2d4) 
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 <net/sock.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>
19 
20 #include "internal.h"
21 
22 #define null_terminated(x)	(strnlen(x, sizeof(x)) < sizeof(x))
23 
24 struct crypto_dump_info {
25 	struct sk_buff *in_skb;
26 	struct sk_buff *out_skb;
27 	u32 nlmsg_seq;
28 	u16 nlmsg_flags;
29 };
30 
31 static int crypto_report_aead(struct sk_buff *skb, struct crypto_alg *alg)
32 {
33 	struct crypto_stat_aead raead;
34 
35 	memset(&raead, 0, sizeof(raead));
36 
37 	strscpy(raead.type, "aead", sizeof(raead.type));
38 
39 	raead.stat_encrypt_cnt = atomic64_read(&alg->stats.aead.encrypt_cnt);
40 	raead.stat_encrypt_tlen = atomic64_read(&alg->stats.aead.encrypt_tlen);
41 	raead.stat_decrypt_cnt = atomic64_read(&alg->stats.aead.decrypt_cnt);
42 	raead.stat_decrypt_tlen = atomic64_read(&alg->stats.aead.decrypt_tlen);
43 	raead.stat_err_cnt = atomic64_read(&alg->stats.aead.err_cnt);
44 
45 	return nla_put(skb, CRYPTOCFGA_STAT_AEAD, sizeof(raead), &raead);
46 }
47 
48 static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg)
49 {
50 	struct crypto_stat_cipher rcipher;
51 
52 	memset(&rcipher, 0, sizeof(rcipher));
53 
54 	strscpy(rcipher.type, "cipher", sizeof(rcipher.type));
55 
56 	rcipher.stat_encrypt_cnt = atomic64_read(&alg->stats.cipher.encrypt_cnt);
57 	rcipher.stat_encrypt_tlen = atomic64_read(&alg->stats.cipher.encrypt_tlen);
58 	rcipher.stat_decrypt_cnt =  atomic64_read(&alg->stats.cipher.decrypt_cnt);
59 	rcipher.stat_decrypt_tlen = atomic64_read(&alg->stats.cipher.decrypt_tlen);
60 	rcipher.stat_err_cnt =  atomic64_read(&alg->stats.cipher.err_cnt);
61 
62 	return nla_put(skb, CRYPTOCFGA_STAT_CIPHER, sizeof(rcipher), &rcipher);
63 }
64 
65 static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg)
66 {
67 	struct crypto_stat_compress rcomp;
68 
69 	memset(&rcomp, 0, sizeof(rcomp));
70 
71 	strscpy(rcomp.type, "compression", sizeof(rcomp.type));
72 	rcomp.stat_compress_cnt = atomic64_read(&alg->stats.compress.compress_cnt);
73 	rcomp.stat_compress_tlen = atomic64_read(&alg->stats.compress.compress_tlen);
74 	rcomp.stat_decompress_cnt = atomic64_read(&alg->stats.compress.decompress_cnt);
75 	rcomp.stat_decompress_tlen = atomic64_read(&alg->stats.compress.decompress_tlen);
76 	rcomp.stat_err_cnt = atomic64_read(&alg->stats.compress.err_cnt);
77 
78 	return nla_put(skb, CRYPTOCFGA_STAT_COMPRESS, sizeof(rcomp), &rcomp);
79 }
80 
81 static int crypto_report_acomp(struct sk_buff *skb, struct crypto_alg *alg)
82 {
83 	struct crypto_stat_compress racomp;
84 
85 	memset(&racomp, 0, sizeof(racomp));
86 
87 	strscpy(racomp.type, "acomp", sizeof(racomp.type));
88 	racomp.stat_compress_cnt = atomic64_read(&alg->stats.compress.compress_cnt);
89 	racomp.stat_compress_tlen = atomic64_read(&alg->stats.compress.compress_tlen);
90 	racomp.stat_decompress_cnt =  atomic64_read(&alg->stats.compress.decompress_cnt);
91 	racomp.stat_decompress_tlen = atomic64_read(&alg->stats.compress.decompress_tlen);
92 	racomp.stat_err_cnt = atomic64_read(&alg->stats.compress.err_cnt);
93 
94 	return nla_put(skb, CRYPTOCFGA_STAT_ACOMP, sizeof(racomp), &racomp);
95 }
96 
97 static int crypto_report_akcipher(struct sk_buff *skb, struct crypto_alg *alg)
98 {
99 	struct crypto_stat_akcipher rakcipher;
100 
101 	memset(&rakcipher, 0, sizeof(rakcipher));
102 
103 	strscpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
104 	rakcipher.stat_encrypt_cnt = atomic64_read(&alg->stats.akcipher.encrypt_cnt);
105 	rakcipher.stat_encrypt_tlen = atomic64_read(&alg->stats.akcipher.encrypt_tlen);
106 	rakcipher.stat_decrypt_cnt = atomic64_read(&alg->stats.akcipher.decrypt_cnt);
107 	rakcipher.stat_decrypt_tlen = atomic64_read(&alg->stats.akcipher.decrypt_tlen);
108 	rakcipher.stat_sign_cnt = atomic64_read(&alg->stats.akcipher.sign_cnt);
109 	rakcipher.stat_verify_cnt = atomic64_read(&alg->stats.akcipher.verify_cnt);
110 	rakcipher.stat_err_cnt = atomic64_read(&alg->stats.akcipher.err_cnt);
111 
112 	return nla_put(skb, CRYPTOCFGA_STAT_AKCIPHER,
113 		       sizeof(rakcipher), &rakcipher);
114 }
115 
116 static int crypto_report_kpp(struct sk_buff *skb, struct crypto_alg *alg)
117 {
118 	struct crypto_stat_kpp rkpp;
119 
120 	memset(&rkpp, 0, sizeof(rkpp));
121 
122 	strscpy(rkpp.type, "kpp", sizeof(rkpp.type));
123 
124 	rkpp.stat_setsecret_cnt = atomic64_read(&alg->stats.kpp.setsecret_cnt);
125 	rkpp.stat_generate_public_key_cnt = atomic64_read(&alg->stats.kpp.generate_public_key_cnt);
126 	rkpp.stat_compute_shared_secret_cnt = atomic64_read(&alg->stats.kpp.compute_shared_secret_cnt);
127 	rkpp.stat_err_cnt = atomic64_read(&alg->stats.kpp.err_cnt);
128 
129 	return nla_put(skb, CRYPTOCFGA_STAT_KPP, sizeof(rkpp), &rkpp);
130 }
131 
132 static int crypto_report_ahash(struct sk_buff *skb, struct crypto_alg *alg)
133 {
134 	struct crypto_stat_hash rhash;
135 
136 	memset(&rhash, 0, sizeof(rhash));
137 
138 	strscpy(rhash.type, "ahash", sizeof(rhash.type));
139 
140 	rhash.stat_hash_cnt = atomic64_read(&alg->stats.hash.hash_cnt);
141 	rhash.stat_hash_tlen = atomic64_read(&alg->stats.hash.hash_tlen);
142 	rhash.stat_err_cnt = atomic64_read(&alg->stats.hash.err_cnt);
143 
144 	return nla_put(skb, CRYPTOCFGA_STAT_HASH, sizeof(rhash), &rhash);
145 }
146 
147 static int crypto_report_shash(struct sk_buff *skb, struct crypto_alg *alg)
148 {
149 	struct crypto_stat_hash rhash;
150 
151 	memset(&rhash, 0, sizeof(rhash));
152 
153 	strscpy(rhash.type, "shash", sizeof(rhash.type));
154 
155 	rhash.stat_hash_cnt =  atomic64_read(&alg->stats.hash.hash_cnt);
156 	rhash.stat_hash_tlen = atomic64_read(&alg->stats.hash.hash_tlen);
157 	rhash.stat_err_cnt = atomic64_read(&alg->stats.hash.err_cnt);
158 
159 	return nla_put(skb, CRYPTOCFGA_STAT_HASH, sizeof(rhash), &rhash);
160 }
161 
162 static int crypto_report_rng(struct sk_buff *skb, struct crypto_alg *alg)
163 {
164 	struct crypto_stat_rng rrng;
165 
166 	memset(&rrng, 0, sizeof(rrng));
167 
168 	strscpy(rrng.type, "rng", sizeof(rrng.type));
169 
170 	rrng.stat_generate_cnt = atomic64_read(&alg->stats.rng.generate_cnt);
171 	rrng.stat_generate_tlen = atomic64_read(&alg->stats.rng.generate_tlen);
172 	rrng.stat_seed_cnt = atomic64_read(&alg->stats.rng.seed_cnt);
173 	rrng.stat_err_cnt = atomic64_read(&alg->stats.rng.err_cnt);
174 
175 	return nla_put(skb, CRYPTOCFGA_STAT_RNG, sizeof(rrng), &rrng);
176 }
177 
178 static int crypto_reportstat_one(struct crypto_alg *alg,
179 				 struct crypto_user_alg *ualg,
180 				 struct sk_buff *skb)
181 {
182 	memset(ualg, 0, sizeof(*ualg));
183 
184 	strscpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name));
185 	strscpy(ualg->cru_driver_name, alg->cra_driver_name,
186 		sizeof(ualg->cru_driver_name));
187 	strscpy(ualg->cru_module_name, module_name(alg->cra_module),
188 		sizeof(ualg->cru_module_name));
189 
190 	ualg->cru_type = 0;
191 	ualg->cru_mask = 0;
192 	ualg->cru_flags = alg->cra_flags;
193 	ualg->cru_refcnt = refcount_read(&alg->cra_refcnt);
194 
195 	if (nla_put_u32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority))
196 		goto nla_put_failure;
197 	if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
198 		struct crypto_stat_larval rl;
199 
200 		memset(&rl, 0, sizeof(rl));
201 		strscpy(rl.type, "larval", sizeof(rl.type));
202 		if (nla_put(skb, CRYPTOCFGA_STAT_LARVAL, sizeof(rl), &rl))
203 			goto nla_put_failure;
204 		goto out;
205 	}
206 
207 	switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
208 	case CRYPTO_ALG_TYPE_AEAD:
209 		if (crypto_report_aead(skb, alg))
210 			goto nla_put_failure;
211 		break;
212 	case CRYPTO_ALG_TYPE_SKCIPHER:
213 		if (crypto_report_cipher(skb, alg))
214 			goto nla_put_failure;
215 		break;
216 	case CRYPTO_ALG_TYPE_CIPHER:
217 		if (crypto_report_cipher(skb, alg))
218 			goto nla_put_failure;
219 		break;
220 	case CRYPTO_ALG_TYPE_COMPRESS:
221 		if (crypto_report_comp(skb, alg))
222 			goto nla_put_failure;
223 		break;
224 	case CRYPTO_ALG_TYPE_ACOMPRESS:
225 		if (crypto_report_acomp(skb, alg))
226 			goto nla_put_failure;
227 		break;
228 	case CRYPTO_ALG_TYPE_SCOMPRESS:
229 		if (crypto_report_acomp(skb, alg))
230 			goto nla_put_failure;
231 		break;
232 	case CRYPTO_ALG_TYPE_AKCIPHER:
233 		if (crypto_report_akcipher(skb, alg))
234 			goto nla_put_failure;
235 		break;
236 	case CRYPTO_ALG_TYPE_KPP:
237 		if (crypto_report_kpp(skb, alg))
238 			goto nla_put_failure;
239 		break;
240 	case CRYPTO_ALG_TYPE_AHASH:
241 		if (crypto_report_ahash(skb, alg))
242 			goto nla_put_failure;
243 		break;
244 	case CRYPTO_ALG_TYPE_HASH:
245 		if (crypto_report_shash(skb, alg))
246 			goto nla_put_failure;
247 		break;
248 	case CRYPTO_ALG_TYPE_RNG:
249 		if (crypto_report_rng(skb, alg))
250 			goto nla_put_failure;
251 		break;
252 	default:
253 		pr_err("ERROR: Unhandled alg %d in %s\n",
254 		       alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL),
255 		       __func__);
256 	}
257 
258 out:
259 	return 0;
260 
261 nla_put_failure:
262 	return -EMSGSIZE;
263 }
264 
265 static int crypto_reportstat_alg(struct crypto_alg *alg,
266 				 struct crypto_dump_info *info)
267 {
268 	struct sk_buff *in_skb = info->in_skb;
269 	struct sk_buff *skb = info->out_skb;
270 	struct nlmsghdr *nlh;
271 	struct crypto_user_alg *ualg;
272 	int err = 0;
273 
274 	nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, info->nlmsg_seq,
275 			CRYPTO_MSG_GETSTAT, sizeof(*ualg), info->nlmsg_flags);
276 	if (!nlh) {
277 		err = -EMSGSIZE;
278 		goto out;
279 	}
280 
281 	ualg = nlmsg_data(nlh);
282 
283 	err = crypto_reportstat_one(alg, ualg, skb);
284 	if (err) {
285 		nlmsg_cancel(skb, nlh);
286 		goto out;
287 	}
288 
289 	nlmsg_end(skb, nlh);
290 
291 out:
292 	return err;
293 }
294 
295 int crypto_reportstat(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
296 		      struct nlattr **attrs)
297 {
298 	struct net *net = sock_net(in_skb->sk);
299 	struct crypto_user_alg *p = nlmsg_data(in_nlh);
300 	struct crypto_alg *alg;
301 	struct sk_buff *skb;
302 	struct crypto_dump_info info;
303 	int err;
304 
305 	if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
306 		return -EINVAL;
307 
308 	alg = crypto_alg_match(p, 0);
309 	if (!alg)
310 		return -ENOENT;
311 
312 	err = -ENOMEM;
313 	skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
314 	if (!skb)
315 		goto drop_alg;
316 
317 	info.in_skb = in_skb;
318 	info.out_skb = skb;
319 	info.nlmsg_seq = in_nlh->nlmsg_seq;
320 	info.nlmsg_flags = 0;
321 
322 	err = crypto_reportstat_alg(alg, &info);
323 
324 drop_alg:
325 	crypto_mod_put(alg);
326 
327 	if (err) {
328 		kfree_skb(skb);
329 		return err;
330 	}
331 
332 	return nlmsg_unicast(net->crypto_nlsk, skb, NETLINK_CB(in_skb).portid);
333 }
334 
335 MODULE_LICENSE("GPL");
336