2 * Create default crypto algorithm instances.
4 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
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)
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>
28 struct cryptomgr_param {
29 struct rtattr *tb[CRYPTO_MAX_ATTRS + 2];
33 struct crypto_attr_type data;
40 struct crypto_attr_alg data;
44 struct crypto_attr_u32 data;
46 } attrs[CRYPTO_MAX_ATTRS];
48 char template[CRYPTO_MAX_ALG_NAME];
50 struct crypto_larval *larval;
56 struct crypto_test_param {
57 char driver[CRYPTO_MAX_ALG_NAME];
58 char alg[CRYPTO_MAX_ALG_NAME];
62 static int cryptomgr_probe(void *data)
64 struct cryptomgr_param *param = data;
65 struct crypto_template *tmpl;
66 struct crypto_instance *inst;
69 tmpl = crypto_lookup_template(param->template);
75 err = tmpl->create(tmpl, param->tb);
79 inst = tmpl->alloc(param->tb);
82 else if ((err = crypto_register_instance(tmpl, inst)))
84 } while (err == -EAGAIN && !signal_pending(current));
86 crypto_tmpl_put(tmpl);
89 complete_all(¶m->larval->completion);
90 crypto_alg_put(¶m->larval->alg);
92 module_put_and_exit(0);
95 static int cryptomgr_schedule_probe(struct crypto_larval *larval)
97 struct task_struct *thread;
98 struct cryptomgr_param *param;
99 const char *name = larval->alg.cra_name;
104 if (!try_module_get(THIS_MODULE))
107 param = kzalloc(sizeof(*param), GFP_KERNEL);
111 for (p = name; isalnum(*p) || *p == '-' || *p == '_'; p++)
115 if (!len || *p != '(')
118 memcpy(param->template, name, len);
127 for (; isalnum(*p) || *p == '-' || *p == '_'; p++)
128 notnum |= !isdigit(*p);
138 else if (*p == ')' && !recursion--)
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);
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);
163 param->tb[i + 1] = ¶m->attrs[i].attr;
166 if (i >= CRYPTO_MAX_ATTRS)
179 param->tb[i + 1] = NULL;
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;
187 param->otype = larval->alg.cra_flags;
188 param->omask = larval->mask;
190 crypto_alg_get(&larval->alg);
191 param->larval = larval;
193 thread = kthread_run(cryptomgr_probe, param, "cryptomgr_probe");
197 wait_for_completion_interruptible(&larval->completion);
202 crypto_alg_put(&larval->alg);
206 module_put(THIS_MODULE);
211 static int cryptomgr_test(void *data)
213 struct crypto_test_param *param = data;
214 u32 type = param->type;
217 #ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS
221 if (type & CRYPTO_ALG_TESTED)
224 err = alg_test(param->driver, param->alg, type, CRYPTO_ALG_TESTED);
227 crypto_alg_tested(param->driver, err);
230 module_put_and_exit(0);
233 static int cryptomgr_schedule_test(struct crypto_alg *alg)
235 struct task_struct *thread;
236 struct crypto_test_param *param;
239 if (!try_module_get(THIS_MODULE))
242 param = kzalloc(sizeof(*param), GFP_KERNEL);
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;
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;
260 thread = kthread_run(cryptomgr_test, param, "cryptomgr_test");
269 module_put(THIS_MODULE);
274 static int cryptomgr_notify(struct notifier_block *this, unsigned long 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);
287 static struct notifier_block cryptomgr_notifier = {
288 .notifier_call = cryptomgr_notify,
291 static int __init cryptomgr_init(void)
293 return crypto_register_notifier(&cryptomgr_notifier);
296 static void __exit cryptomgr_exit(void)
298 int err = crypto_unregister_notifier(&cryptomgr_notifier);
302 subsys_initcall(cryptomgr_init);
303 module_exit(cryptomgr_exit);
305 MODULE_LICENSE("GPL");
306 MODULE_DESCRIPTION("Crypto Algorithm Manager");