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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
13#include <crypto/internal/aead.h>
14#include <linux/completion.h>
15#include <linux/ctype.h>
16#include <linux/err.h>
17#include <linux/init.h>
18#include <linux/kthread.h>
19#include <linux/module.h>
20#include <linux/notifier.h>
21#include <linux/rtnetlink.h>
22#include <linux/sched.h>
23#include <linux/slab.h>
24#include <linux/string.h>
25
26#include "internal.h"
27
28struct cryptomgr_param {
29 struct rtattr *tb[CRYPTO_MAX_ATTRS + 2];
30
31 struct {
32 struct rtattr attr;
33 struct crypto_attr_type data;
34 } type;
35
36 union {
37 struct rtattr attr;
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
48 char template[CRYPTO_MAX_ALG_NAME];
49
50 struct crypto_larval *larval;
51
52 u32 otype;
53 u32 omask;
54};
55
56struct crypto_test_param {
57 char driver[CRYPTO_MAX_ALG_NAME];
58 char alg[CRYPTO_MAX_ALG_NAME];
59 u32 type;
60};
61
62static int cryptomgr_probe(void *data)
63{
64 struct cryptomgr_param *param = data;
65 struct crypto_template *tmpl;
66 struct crypto_instance *inst;
67 int err;
68
69 tmpl = crypto_lookup_template(param->template);
70 if (!tmpl)
71 goto out;
72
73 do {
74 if (tmpl->create) {
75 err = tmpl->create(tmpl, param->tb);
76 continue;
77 }
78
79 inst = tmpl->alloc(param->tb);
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));
85
86 crypto_tmpl_put(tmpl);
87
88out:
89 complete_all(¶m->larval->completion);
90 crypto_alg_put(¶m->larval->alg);
91 kfree(param);
92 module_put_and_exit(0);
93}
94
95static int cryptomgr_schedule_probe(struct crypto_larval *larval)
96{
97 struct task_struct *thread;
98 struct cryptomgr_param *param;
99 const char *name = larval->alg.cra_name;
100 const char *p;
101 unsigned int len;
102 int i;
103
104 if (!try_module_get(THIS_MODULE))
105 goto err;
106
107 param = kzalloc(sizeof(*param), GFP_KERNEL);
108 if (!param)
109 goto err_put_module;
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);
119
120 i = 0;
121 for (;;) {
122 int notnum = 0;
123
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;
143 p++;
144 }
145
146 len = p - name;
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
166 if (i >= CRYPTO_MAX_ATTRS)
167 goto err_free_param;
168
169 if (*p == ')')
170 break;
171
172 if (*p != ',')
173 goto err_free_param;
174 }
175
176 if (!i)
177 goto err_free_param;
178
179 param->tb[i + 1] = NULL;
180
181 param->type.attr.rta_len = sizeof(param->type);
182 param->type.attr.rta_type = CRYPTOA_TYPE;
183 param->type.data.type = larval->alg.cra_flags & ~CRYPTO_ALG_TESTED;
184 param->type.data.mask = larval->mask & ~CRYPTO_ALG_TESTED;
185 param->tb[0] = ¶m->type.attr;
186
187 param->otype = larval->alg.cra_flags;
188 param->omask = larval->mask;
189
190 crypto_alg_get(&larval->alg);
191 param->larval = larval;
192
193 thread = kthread_run(cryptomgr_probe, param, "cryptomgr_probe");
194 if (IS_ERR(thread))
195 goto err_put_larval;
196
197 wait_for_completion_interruptible(&larval->completion);
198
199 return NOTIFY_STOP;
200
201err_put_larval:
202 crypto_alg_put(&larval->alg);
203err_free_param:
204 kfree(param);
205err_put_module:
206 module_put(THIS_MODULE);
207err:
208 return NOTIFY_OK;
209}
210
211static int cryptomgr_test(void *data)
212{
213 struct crypto_test_param *param = data;
214 u32 type = param->type;
215 int err = 0;
216
217#ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS
218 goto skiptest;
219#endif
220
221 if (type & CRYPTO_ALG_TESTED)
222 goto skiptest;
223
224 err = alg_test(param->driver, param->alg, type, CRYPTO_ALG_TESTED);
225
226skiptest:
227 crypto_alg_tested(param->driver, err);
228
229 kfree(param);
230 module_put_and_exit(0);
231}
232
233static int cryptomgr_schedule_test(struct crypto_alg *alg)
234{
235 struct task_struct *thread;
236 struct crypto_test_param *param;
237 u32 type;
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));
248 type = alg->cra_flags;
249
250 /* This piece of crap needs to disappear into per-type test hooks. */
251 if (!((type ^ CRYPTO_ALG_TYPE_BLKCIPHER) &
252 CRYPTO_ALG_TYPE_BLKCIPHER_MASK) && !(type & CRYPTO_ALG_GENIV) &&
253 ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
254 CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize :
255 alg->cra_ablkcipher.ivsize))
256 type |= CRYPTO_ALG_TESTED;
257
258 param->type = type;
259
260 thread = kthread_run(cryptomgr_test, param, "cryptomgr_test");
261 if (IS_ERR(thread))
262 goto err_free_param;
263
264 return NOTIFY_STOP;
265
266err_free_param:
267 kfree(param);
268err_put_module:
269 module_put(THIS_MODULE);
270err:
271 return NOTIFY_OK;
272}
273
274static int cryptomgr_notify(struct notifier_block *this, unsigned long msg,
275 void *data)
276{
277 switch (msg) {
278 case CRYPTO_MSG_ALG_REQUEST:
279 return cryptomgr_schedule_probe(data);
280 case CRYPTO_MSG_ALG_REGISTER:
281 return cryptomgr_schedule_test(data);
282 }
283
284 return NOTIFY_DONE;
285}
286
287static struct notifier_block cryptomgr_notifier = {
288 .notifier_call = cryptomgr_notify,
289};
290
291static int __init cryptomgr_init(void)
292{
293 return crypto_register_notifier(&cryptomgr_notifier);
294}
295
296static void __exit cryptomgr_exit(void)
297{
298 int err = crypto_unregister_notifier(&cryptomgr_notifier);
299 BUG_ON(err);
300}
301
302subsys_initcall(cryptomgr_init);
303module_exit(cryptomgr_exit);
304
305MODULE_LICENSE("GPL");
306MODULE_DESCRIPTION("Crypto Algorithm Manager");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Create default crypto algorithm instances.
4 *
5 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
6 */
7
8#include <crypto/internal/aead.h>
9#include <linux/completion.h>
10#include <linux/ctype.h>
11#include <linux/err.h>
12#include <linux/init.h>
13#include <linux/kthread.h>
14#include <linux/module.h>
15#include <linux/notifier.h>
16#include <linux/rtnetlink.h>
17#include <linux/sched/signal.h>
18#include <linux/slab.h>
19#include <linux/string.h>
20
21#include "internal.h"
22
23struct cryptomgr_param {
24 struct rtattr *tb[CRYPTO_MAX_ATTRS + 2];
25
26 struct {
27 struct rtattr attr;
28 struct crypto_attr_type data;
29 } type;
30
31 union {
32 struct rtattr attr;
33 struct {
34 struct rtattr attr;
35 struct crypto_attr_alg data;
36 } alg;
37 struct {
38 struct rtattr attr;
39 struct crypto_attr_u32 data;
40 } nu32;
41 } attrs[CRYPTO_MAX_ATTRS];
42
43 char template[CRYPTO_MAX_ALG_NAME];
44
45 struct crypto_larval *larval;
46
47 u32 otype;
48 u32 omask;
49};
50
51struct crypto_test_param {
52 char driver[CRYPTO_MAX_ALG_NAME];
53 char alg[CRYPTO_MAX_ALG_NAME];
54 u32 type;
55};
56
57static int cryptomgr_probe(void *data)
58{
59 struct cryptomgr_param *param = data;
60 struct crypto_template *tmpl;
61 struct crypto_instance *inst;
62 int err;
63
64 tmpl = crypto_lookup_template(param->template);
65 if (!tmpl)
66 goto out;
67
68 do {
69 if (tmpl->create) {
70 err = tmpl->create(tmpl, param->tb);
71 continue;
72 }
73
74 inst = tmpl->alloc(param->tb);
75 if (IS_ERR(inst))
76 err = PTR_ERR(inst);
77 else if ((err = crypto_register_instance(tmpl, inst)))
78 tmpl->free(inst);
79 } while (err == -EAGAIN && !signal_pending(current));
80
81 crypto_tmpl_put(tmpl);
82
83out:
84 complete_all(¶m->larval->completion);
85 crypto_alg_put(¶m->larval->alg);
86 kfree(param);
87 module_put_and_exit(0);
88}
89
90static int cryptomgr_schedule_probe(struct crypto_larval *larval)
91{
92 struct task_struct *thread;
93 struct cryptomgr_param *param;
94 const char *name = larval->alg.cra_name;
95 const char *p;
96 unsigned int len;
97 int i;
98
99 if (!try_module_get(THIS_MODULE))
100 goto err;
101
102 param = kzalloc(sizeof(*param), GFP_KERNEL);
103 if (!param)
104 goto err_put_module;
105
106 for (p = name; isalnum(*p) || *p == '-' || *p == '_'; p++)
107 ;
108
109 len = p - name;
110 if (!len || *p != '(')
111 goto err_free_param;
112
113 memcpy(param->template, name, len);
114
115 i = 0;
116 for (;;) {
117 int notnum = 0;
118
119 name = ++p;
120
121 for (; isalnum(*p) || *p == '-' || *p == '_'; p++)
122 notnum |= !isdigit(*p);
123
124 if (*p == '(') {
125 int recursion = 0;
126
127 for (;;) {
128 if (!*++p)
129 goto err_free_param;
130 if (*p == '(')
131 recursion++;
132 else if (*p == ')' && !recursion--)
133 break;
134 }
135
136 notnum = 1;
137 p++;
138 }
139
140 len = p - name;
141 if (!len)
142 goto err_free_param;
143
144 if (notnum) {
145 param->attrs[i].alg.attr.rta_len =
146 sizeof(param->attrs[i].alg);
147 param->attrs[i].alg.attr.rta_type = CRYPTOA_ALG;
148 memcpy(param->attrs[i].alg.data.name, name, len);
149 } else {
150 param->attrs[i].nu32.attr.rta_len =
151 sizeof(param->attrs[i].nu32);
152 param->attrs[i].nu32.attr.rta_type = CRYPTOA_U32;
153 param->attrs[i].nu32.data.num =
154 simple_strtol(name, NULL, 0);
155 }
156
157 param->tb[i + 1] = ¶m->attrs[i].attr;
158 i++;
159
160 if (i >= CRYPTO_MAX_ATTRS)
161 goto err_free_param;
162
163 if (*p == ')')
164 break;
165
166 if (*p != ',')
167 goto err_free_param;
168 }
169
170 if (!i)
171 goto err_free_param;
172
173 param->tb[i + 1] = NULL;
174
175 param->type.attr.rta_len = sizeof(param->type);
176 param->type.attr.rta_type = CRYPTOA_TYPE;
177 param->type.data.type = larval->alg.cra_flags & ~CRYPTO_ALG_TESTED;
178 param->type.data.mask = larval->mask & ~CRYPTO_ALG_TESTED;
179 param->tb[0] = ¶m->type.attr;
180
181 param->otype = larval->alg.cra_flags;
182 param->omask = larval->mask;
183
184 crypto_alg_get(&larval->alg);
185 param->larval = larval;
186
187 thread = kthread_run(cryptomgr_probe, param, "cryptomgr_probe");
188 if (IS_ERR(thread))
189 goto err_put_larval;
190
191 wait_for_completion_interruptible(&larval->completion);
192
193 return NOTIFY_STOP;
194
195err_put_larval:
196 crypto_alg_put(&larval->alg);
197err_free_param:
198 kfree(param);
199err_put_module:
200 module_put(THIS_MODULE);
201err:
202 return NOTIFY_OK;
203}
204
205static int cryptomgr_test(void *data)
206{
207 struct crypto_test_param *param = data;
208 u32 type = param->type;
209 int err = 0;
210
211#ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS
212 goto skiptest;
213#endif
214
215 if (type & CRYPTO_ALG_TESTED)
216 goto skiptest;
217
218 err = alg_test(param->driver, param->alg, type, CRYPTO_ALG_TESTED);
219
220skiptest:
221 crypto_alg_tested(param->driver, err);
222
223 kfree(param);
224 module_put_and_exit(0);
225}
226
227static int cryptomgr_schedule_test(struct crypto_alg *alg)
228{
229 struct task_struct *thread;
230 struct crypto_test_param *param;
231 u32 type;
232
233 if (!try_module_get(THIS_MODULE))
234 goto err;
235
236 param = kzalloc(sizeof(*param), GFP_KERNEL);
237 if (!param)
238 goto err_put_module;
239
240 memcpy(param->driver, alg->cra_driver_name, sizeof(param->driver));
241 memcpy(param->alg, alg->cra_name, sizeof(param->alg));
242 type = alg->cra_flags;
243
244 /* Do not test internal algorithms. */
245 if (type & CRYPTO_ALG_INTERNAL)
246 type |= CRYPTO_ALG_TESTED;
247
248 param->type = type;
249
250 thread = kthread_run(cryptomgr_test, param, "cryptomgr_test");
251 if (IS_ERR(thread))
252 goto err_free_param;
253
254 return NOTIFY_STOP;
255
256err_free_param:
257 kfree(param);
258err_put_module:
259 module_put(THIS_MODULE);
260err:
261 return NOTIFY_OK;
262}
263
264static int cryptomgr_notify(struct notifier_block *this, unsigned long msg,
265 void *data)
266{
267 switch (msg) {
268 case CRYPTO_MSG_ALG_REQUEST:
269 return cryptomgr_schedule_probe(data);
270 case CRYPTO_MSG_ALG_REGISTER:
271 return cryptomgr_schedule_test(data);
272 case CRYPTO_MSG_ALG_LOADED:
273 break;
274 }
275
276 return NOTIFY_DONE;
277}
278
279static struct notifier_block cryptomgr_notifier = {
280 .notifier_call = cryptomgr_notify,
281};
282
283static int __init cryptomgr_init(void)
284{
285 return crypto_register_notifier(&cryptomgr_notifier);
286}
287
288static void __exit cryptomgr_exit(void)
289{
290 int err = crypto_unregister_notifier(&cryptomgr_notifier);
291 BUG_ON(err);
292}
293
294/*
295 * This is arch_initcall() so that the crypto self-tests are run on algorithms
296 * registered early by subsys_initcall(). subsys_initcall() is needed for
297 * generic implementations so that they're available for comparison tests when
298 * other implementations are registered later by module_init().
299 */
300arch_initcall(cryptomgr_init);
301module_exit(cryptomgr_exit);
302
303MODULE_LICENSE("GPL");
304MODULE_DESCRIPTION("Crypto Algorithm Manager");