]>
Commit | Line | Data |
---|---|---|
2b8c19db HX |
1 | /* |
2 | * Create default crypto algorithm instances. | |
3 | * | |
4 | * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | */ | |
12 | ||
6fe4a28d | 13 | #include <crypto/internal/aead.h> |
39871037 | 14 | #include <linux/completion.h> |
2b8c19db HX |
15 | #include <linux/ctype.h> |
16 | #include <linux/err.h> | |
17 | #include <linux/init.h> | |
cf02f5da | 18 | #include <linux/kthread.h> |
2b8c19db HX |
19 | #include <linux/module.h> |
20 | #include <linux/notifier.h> | |
21 | #include <linux/rtnetlink.h> | |
6bfd4809 | 22 | #include <linux/sched.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
2b8c19db | 24 | #include <linux/string.h> |
2b8c19db HX |
25 | |
26 | #include "internal.h" | |
27 | ||
28 | struct cryptomgr_param { | |
39e1ee01 | 29 | struct rtattr *tb[CRYPTO_MAX_ATTRS + 2]; |
ebc610e5 HX |
30 | |
31 | struct { | |
32 | struct rtattr attr; | |
33 | struct crypto_attr_type data; | |
34 | } type; | |
35 | ||
39e1ee01 | 36 | union { |
2b8c19db | 37 | struct rtattr attr; |
39e1ee01 HX |
38 | struct { |
39 | struct rtattr attr; | |
40 | struct crypto_attr_alg data; | |
41 | } alg; | |
42 | struct { | |
43 | struct rtattr attr; | |
44 | struct crypto_attr_u32 data; | |
45 | } nu32; | |
46 | } attrs[CRYPTO_MAX_ATTRS]; | |
47 | ||
2b8c19db | 48 | char template[CRYPTO_MAX_ALG_NAME]; |
73d3864a | 49 | |
939e1779 | 50 | struct crypto_larval *larval; |
39871037 | 51 | |
73d3864a HX |
52 | u32 otype; |
53 | u32 omask; | |
54 | }; | |
55 | ||
56 | struct crypto_test_param { | |
57 | char driver[CRYPTO_MAX_ALG_NAME]; | |
58 | char alg[CRYPTO_MAX_ALG_NAME]; | |
59 | u32 type; | |
2b8c19db HX |
60 | }; |
61 | ||
cf02f5da | 62 | static int cryptomgr_probe(void *data) |
2b8c19db | 63 | { |
cf02f5da | 64 | struct cryptomgr_param *param = data; |
2b8c19db HX |
65 | struct crypto_template *tmpl; |
66 | struct crypto_instance *inst; | |
6bfd4809 | 67 | int err; |
2b8c19db HX |
68 | |
69 | tmpl = crypto_lookup_template(param->template); | |
70 | if (!tmpl) | |
39871037 | 71 | goto out; |
2b8c19db | 72 | |
6bfd4809 | 73 | do { |
f2ac72e8 HX |
74 | if (tmpl->create) { |
75 | err = tmpl->create(tmpl, param->tb); | |
76 | continue; | |
77 | } | |
78 | ||
ebc610e5 | 79 | inst = tmpl->alloc(param->tb); |
6bfd4809 HX |
80 | if (IS_ERR(inst)) |
81 | err = PTR_ERR(inst); | |
82 | else if ((err = crypto_register_instance(tmpl, inst))) | |
83 | tmpl->free(inst); | |
84 | } while (err == -EAGAIN && !signal_pending(current)); | |
2b8c19db HX |
85 | |
86 | crypto_tmpl_put(tmpl); | |
87 | ||
88 | out: | |
939e1779 HX |
89 | complete_all(¶m->larval->completion); |
90 | crypto_alg_put(¶m->larval->alg); | |
2b8c19db | 91 | kfree(param); |
cf02f5da | 92 | module_put_and_exit(0); |
2b8c19db HX |
93 | } |
94 | ||
95 | static int cryptomgr_schedule_probe(struct crypto_larval *larval) | |
96 | { | |
1605b847 | 97 | struct task_struct *thread; |
2b8c19db HX |
98 | struct cryptomgr_param *param; |
99 | const char *name = larval->alg.cra_name; | |
100 | const char *p; | |
101 | unsigned int len; | |
39e1ee01 | 102 | int i; |
2b8c19db | 103 | |
cf02f5da HX |
104 | if (!try_module_get(THIS_MODULE)) |
105 | goto err; | |
106 | ||
ebc610e5 | 107 | param = kzalloc(sizeof(*param), GFP_KERNEL); |
2b8c19db | 108 | if (!param) |
cf02f5da | 109 | goto err_put_module; |
2b8c19db HX |
110 | |
111 | for (p = name; isalnum(*p) || *p == '-' || *p == '_'; p++) | |
112 | ; | |
113 | ||
114 | len = p - name; | |
115 | if (!len || *p != '(') | |
116 | goto err_free_param; | |
117 | ||
118 | memcpy(param->template, name, len); | |
2b8c19db | 119 | |
39e1ee01 HX |
120 | i = 0; |
121 | for (;;) { | |
122 | int notnum = 0; | |
2b8c19db | 123 | |
39e1ee01 HX |
124 | name = ++p; |
125 | len = 0; | |
126 | ||
127 | for (; isalnum(*p) || *p == '-' || *p == '_'; p++) | |
128 | notnum |= !isdigit(*p); | |
129 | ||
130 | if (*p == '(') { | |
131 | int recursion = 0; | |
132 | ||
133 | for (;;) { | |
134 | if (!*++p) | |
135 | goto err_free_param; | |
136 | if (*p == '(') | |
137 | recursion++; | |
138 | else if (*p == ')' && !recursion--) | |
139 | break; | |
140 | } | |
141 | ||
142 | notnum = 1; | |
720a650f | 143 | p++; |
39e1ee01 | 144 | } |
cf02f5da HX |
145 | |
146 | len = p - name; | |
39e1ee01 HX |
147 | if (!len) |
148 | goto err_free_param; | |
149 | ||
150 | if (notnum) { | |
151 | param->attrs[i].alg.attr.rta_len = | |
152 | sizeof(param->attrs[i].alg); | |
153 | param->attrs[i].alg.attr.rta_type = CRYPTOA_ALG; | |
154 | memcpy(param->attrs[i].alg.data.name, name, len); | |
155 | } else { | |
156 | param->attrs[i].nu32.attr.rta_len = | |
157 | sizeof(param->attrs[i].nu32); | |
158 | param->attrs[i].nu32.attr.rta_type = CRYPTOA_U32; | |
159 | param->attrs[i].nu32.data.num = | |
160 | simple_strtol(name, NULL, 0); | |
161 | } | |
162 | ||
163 | param->tb[i + 1] = ¶m->attrs[i].attr; | |
164 | i++; | |
165 | ||
720a650f | 166 | if (i >= CRYPTO_MAX_ATTRS) |
39e1ee01 HX |
167 | goto err_free_param; |
168 | ||
169 | if (*p == ')') | |
170 | break; | |
171 | ||
172 | if (*p != ',') | |
173 | goto err_free_param; | |
cf02f5da HX |
174 | } |
175 | ||
39e1ee01 | 176 | if (!i) |
2b8c19db HX |
177 | goto err_free_param; |
178 | ||
39e1ee01 HX |
179 | param->tb[i + 1] = NULL; |
180 | ||
ebc610e5 HX |
181 | param->type.attr.rta_len = sizeof(param->type); |
182 | param->type.attr.rta_type = CRYPTOA_TYPE; | |
73d3864a HX |
183 | param->type.data.type = larval->alg.cra_flags & ~CRYPTO_ALG_TESTED; |
184 | param->type.data.mask = larval->mask & ~CRYPTO_ALG_TESTED; | |
39e1ee01 | 185 | param->tb[0] = ¶m->type.attr; |
2b8c19db | 186 | |
73d3864a HX |
187 | param->otype = larval->alg.cra_flags; |
188 | param->omask = larval->mask; | |
189 | ||
939e1779 HX |
190 | crypto_alg_get(&larval->alg); |
191 | param->larval = larval; | |
39871037 | 192 | |
73d3864a HX |
193 | thread = kthread_run(cryptomgr_probe, param, "cryptomgr_probe"); |
194 | if (IS_ERR(thread)) | |
939e1779 | 195 | goto err_put_larval; |
73d3864a | 196 | |
39871037 HX |
197 | wait_for_completion_interruptible(&larval->completion); |
198 | ||
73d3864a HX |
199 | return NOTIFY_STOP; |
200 | ||
939e1779 HX |
201 | err_put_larval: |
202 | crypto_alg_put(&larval->alg); | |
73d3864a HX |
203 | err_free_param: |
204 | kfree(param); | |
205 | err_put_module: | |
206 | module_put(THIS_MODULE); | |
207 | err: | |
208 | return NOTIFY_OK; | |
209 | } | |
210 | ||
211 | static int cryptomgr_test(void *data) | |
212 | { | |
213 | struct crypto_test_param *param = data; | |
214 | u32 type = param->type; | |
215 | int err = 0; | |
216 | ||
326a6346 HX |
217 | #ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS |
218 | goto skiptest; | |
219 | #endif | |
220 | ||
6fe4a28d | 221 | if (type & CRYPTO_ALG_TESTED) |
73d3864a HX |
222 | goto skiptest; |
223 | ||
1aa4ecd9 | 224 | err = alg_test(param->driver, param->alg, type, CRYPTO_ALG_TESTED); |
73d3864a HX |
225 | |
226 | skiptest: | |
227 | crypto_alg_tested(param->driver, err); | |
228 | ||
229 | kfree(param); | |
230 | module_put_and_exit(0); | |
231 | } | |
232 | ||
233 | static int cryptomgr_schedule_test(struct crypto_alg *alg) | |
234 | { | |
235 | struct task_struct *thread; | |
236 | struct crypto_test_param *param; | |
6fe4a28d | 237 | u32 type; |
73d3864a HX |
238 | |
239 | if (!try_module_get(THIS_MODULE)) | |
240 | goto err; | |
241 | ||
242 | param = kzalloc(sizeof(*param), GFP_KERNEL); | |
243 | if (!param) | |
244 | goto err_put_module; | |
245 | ||
246 | memcpy(param->driver, alg->cra_driver_name, sizeof(param->driver)); | |
247 | memcpy(param->alg, alg->cra_name, sizeof(param->alg)); | |
6fe4a28d HX |
248 | type = alg->cra_flags; |
249 | ||
eed93e0c HX |
250 | /* Do not test internal algorithms. */ |
251 | if (type & CRYPTO_ALG_INTERNAL) | |
6fe4a28d HX |
252 | type |= CRYPTO_ALG_TESTED; |
253 | ||
254 | param->type = type; | |
73d3864a HX |
255 | |
256 | thread = kthread_run(cryptomgr_test, param, "cryptomgr_test"); | |
1605b847 | 257 | if (IS_ERR(thread)) |
cf02f5da | 258 | goto err_free_param; |
2b8c19db HX |
259 | |
260 | return NOTIFY_STOP; | |
261 | ||
262 | err_free_param: | |
263 | kfree(param); | |
cf02f5da HX |
264 | err_put_module: |
265 | module_put(THIS_MODULE); | |
2b8c19db HX |
266 | err: |
267 | return NOTIFY_OK; | |
268 | } | |
269 | ||
270 | static int cryptomgr_notify(struct notifier_block *this, unsigned long msg, | |
271 | void *data) | |
272 | { | |
273 | switch (msg) { | |
274 | case CRYPTO_MSG_ALG_REQUEST: | |
275 | return cryptomgr_schedule_probe(data); | |
73d3864a HX |
276 | case CRYPTO_MSG_ALG_REGISTER: |
277 | return cryptomgr_schedule_test(data); | |
2b8c19db HX |
278 | } |
279 | ||
280 | return NOTIFY_DONE; | |
281 | } | |
282 | ||
283 | static struct notifier_block cryptomgr_notifier = { | |
284 | .notifier_call = cryptomgr_notify, | |
285 | }; | |
286 | ||
287 | static int __init cryptomgr_init(void) | |
288 | { | |
f8b0d4d0 | 289 | return crypto_register_notifier(&cryptomgr_notifier); |
2b8c19db HX |
290 | } |
291 | ||
292 | static void __exit cryptomgr_exit(void) | |
293 | { | |
294 | int err = crypto_unregister_notifier(&cryptomgr_notifier); | |
295 | BUG_ON(err); | |
296 | } | |
297 | ||
da7f033d | 298 | subsys_initcall(cryptomgr_init); |
2b8c19db HX |
299 | module_exit(cryptomgr_exit); |
300 | ||
301 | MODULE_LICENSE("GPL"); | |
302 | MODULE_DESCRIPTION("Crypto Algorithm Manager"); |