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 <linux/crypto.h>
14 #include <linux/ctype.h>
15 #include <linux/err.h>
16 #include <linux/init.h>
17 #include <linux/kthread.h>
18 #include <linux/module.h>
19 #include <linux/notifier.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/sched.h>
22 #include <linux/string.h>
26 struct cryptomgr_param {
27 struct rtattr *tb[CRYPTO_MAX_ATTRS + 2];
31 struct crypto_attr_type data;
38 struct crypto_attr_alg data;
42 struct crypto_attr_u32 data;
44 } attrs[CRYPTO_MAX_ATTRS];
46 char larval[CRYPTO_MAX_ALG_NAME];
47 char template[CRYPTO_MAX_ALG_NAME];
53 struct crypto_test_param {
54 char driver[CRYPTO_MAX_ALG_NAME];
55 char alg[CRYPTO_MAX_ALG_NAME];
59 static int cryptomgr_probe(void *data)
61 struct cryptomgr_param *param = data;
62 struct crypto_template *tmpl;
63 struct crypto_instance *inst;
66 tmpl = crypto_lookup_template(param->template);
71 inst = tmpl->alloc(param->tb);
74 else if ((err = crypto_register_instance(tmpl, inst)))
76 } while (err == -EAGAIN && !signal_pending(current));
78 crypto_tmpl_put(tmpl);
85 module_put_and_exit(0);
88 crypto_larval_error(param->larval, param->otype, param->omask);
92 static int cryptomgr_schedule_probe(struct crypto_larval *larval)
94 struct task_struct *thread;
95 struct cryptomgr_param *param;
96 const char *name = larval->alg.cra_name;
101 if (!try_module_get(THIS_MODULE))
104 param = kzalloc(sizeof(*param), GFP_KERNEL);
108 for (p = name; isalnum(*p) || *p == '-' || *p == '_'; p++)
112 if (!len || *p != '(')
115 memcpy(param->template, name, len);
124 for (; isalnum(*p) || *p == '-' || *p == '_'; p++)
125 notnum |= !isdigit(*p);
135 else if (*p == ')' && !recursion--)
148 param->attrs[i].alg.attr.rta_len =
149 sizeof(param->attrs[i].alg);
150 param->attrs[i].alg.attr.rta_type = CRYPTOA_ALG;
151 memcpy(param->attrs[i].alg.data.name, name, len);
153 param->attrs[i].nu32.attr.rta_len =
154 sizeof(param->attrs[i].nu32);
155 param->attrs[i].nu32.attr.rta_type = CRYPTOA_U32;
156 param->attrs[i].nu32.data.num =
157 simple_strtol(name, NULL, 0);
160 param->tb[i + 1] = ¶m->attrs[i].attr;
163 if (i >= CRYPTO_MAX_ATTRS)
176 param->tb[i + 1] = NULL;
178 param->type.attr.rta_len = sizeof(param->type);
179 param->type.attr.rta_type = CRYPTOA_TYPE;
180 param->type.data.type = larval->alg.cra_flags & ~CRYPTO_ALG_TESTED;
181 param->type.data.mask = larval->mask & ~CRYPTO_ALG_TESTED;
182 param->tb[0] = ¶m->type.attr;
184 param->otype = larval->alg.cra_flags;
185 param->omask = larval->mask;
187 memcpy(param->larval, larval->alg.cra_name, CRYPTO_MAX_ALG_NAME);
189 thread = kthread_run(cryptomgr_probe, param, "cryptomgr_probe");
198 module_put(THIS_MODULE);
203 static int cryptomgr_test(void *data)
205 struct crypto_test_param *param = data;
206 u32 type = param->type;
209 if (!((type ^ CRYPTO_ALG_TYPE_BLKCIPHER) &
210 CRYPTO_ALG_TYPE_BLKCIPHER_MASK) && !(type & CRYPTO_ALG_GENIV))
213 err = alg_test(param->driver, param->alg, type, CRYPTO_ALG_TESTED);
216 crypto_alg_tested(param->driver, err);
219 module_put_and_exit(0);
222 static int cryptomgr_schedule_test(struct crypto_alg *alg)
224 struct task_struct *thread;
225 struct crypto_test_param *param;
227 if (!try_module_get(THIS_MODULE))
230 param = kzalloc(sizeof(*param), GFP_KERNEL);
234 memcpy(param->driver, alg->cra_driver_name, sizeof(param->driver));
235 memcpy(param->alg, alg->cra_name, sizeof(param->alg));
236 param->type = alg->cra_flags;
238 thread = kthread_run(cryptomgr_test, param, "cryptomgr_test");
247 module_put(THIS_MODULE);
252 static int cryptomgr_notify(struct notifier_block *this, unsigned long msg,
256 case CRYPTO_MSG_ALG_REQUEST:
257 return cryptomgr_schedule_probe(data);
258 case CRYPTO_MSG_ALG_REGISTER:
259 return cryptomgr_schedule_test(data);
265 static struct notifier_block cryptomgr_notifier = {
266 .notifier_call = cryptomgr_notify,
269 static int __init cryptomgr_init(void)
273 err = testmgr_init();
277 err = crypto_register_notifier(&cryptomgr_notifier);
288 static void __exit cryptomgr_exit(void)
290 int err = crypto_unregister_notifier(&cryptomgr_notifier);
296 subsys_initcall(cryptomgr_init);
297 module_exit(cryptomgr_exit);
299 MODULE_LICENSE("GPL");
300 MODULE_DESCRIPTION("Crypto Algorithm Manager");