sungem: Fix WakeOnLan
[zen-stable.git] / crypto / algboss.c
blob791d194958fa18ac0fb8006e5d565f789c1e4f92
1 /*
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)
9 * any later version.
13 #include <crypto/internal/aead.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/slab.h>
23 #include <linux/string.h>
25 #include "internal.h"
27 struct cryptomgr_param {
28 struct rtattr *tb[CRYPTO_MAX_ATTRS + 2];
30 struct {
31 struct rtattr attr;
32 struct crypto_attr_type data;
33 } type;
35 union {
36 struct rtattr attr;
37 struct {
38 struct rtattr attr;
39 struct crypto_attr_alg data;
40 } alg;
41 struct {
42 struct rtattr attr;
43 struct crypto_attr_u32 data;
44 } nu32;
45 } attrs[CRYPTO_MAX_ATTRS];
47 char larval[CRYPTO_MAX_ALG_NAME];
48 char template[CRYPTO_MAX_ALG_NAME];
50 u32 otype;
51 u32 omask;
54 struct crypto_test_param {
55 char driver[CRYPTO_MAX_ALG_NAME];
56 char alg[CRYPTO_MAX_ALG_NAME];
57 u32 type;
60 static int cryptomgr_probe(void *data)
62 struct cryptomgr_param *param = data;
63 struct crypto_template *tmpl;
64 struct crypto_instance *inst;
65 int err;
67 tmpl = crypto_lookup_template(param->template);
68 if (!tmpl)
69 goto err;
71 do {
72 if (tmpl->create) {
73 err = tmpl->create(tmpl, param->tb);
74 continue;
77 inst = tmpl->alloc(param->tb);
78 if (IS_ERR(inst))
79 err = PTR_ERR(inst);
80 else if ((err = crypto_register_instance(tmpl, inst)))
81 tmpl->free(inst);
82 } while (err == -EAGAIN && !signal_pending(current));
84 crypto_tmpl_put(tmpl);
86 if (err)
87 goto err;
89 out:
90 kfree(param);
91 module_put_and_exit(0);
93 err:
94 crypto_larval_error(param->larval, param->otype, param->omask);
95 goto out;
98 static int cryptomgr_schedule_probe(struct crypto_larval *larval)
100 struct task_struct *thread;
101 struct cryptomgr_param *param;
102 const char *name = larval->alg.cra_name;
103 const char *p;
104 unsigned int len;
105 int i;
107 if (!try_module_get(THIS_MODULE))
108 goto err;
110 param = kzalloc(sizeof(*param), GFP_KERNEL);
111 if (!param)
112 goto err_put_module;
114 for (p = name; isalnum(*p) || *p == '-' || *p == '_'; p++)
117 len = p - name;
118 if (!len || *p != '(')
119 goto err_free_param;
121 memcpy(param->template, name, len);
123 i = 0;
124 for (;;) {
125 int notnum = 0;
127 name = ++p;
128 len = 0;
130 for (; isalnum(*p) || *p == '-' || *p == '_'; p++)
131 notnum |= !isdigit(*p);
133 if (*p == '(') {
134 int recursion = 0;
136 for (;;) {
137 if (!*++p)
138 goto err_free_param;
139 if (*p == '(')
140 recursion++;
141 else if (*p == ')' && !recursion--)
142 break;
145 notnum = 1;
146 p++;
149 len = p - name;
150 if (!len)
151 goto err_free_param;
153 if (notnum) {
154 param->attrs[i].alg.attr.rta_len =
155 sizeof(param->attrs[i].alg);
156 param->attrs[i].alg.attr.rta_type = CRYPTOA_ALG;
157 memcpy(param->attrs[i].alg.data.name, name, len);
158 } else {
159 param->attrs[i].nu32.attr.rta_len =
160 sizeof(param->attrs[i].nu32);
161 param->attrs[i].nu32.attr.rta_type = CRYPTOA_U32;
162 param->attrs[i].nu32.data.num =
163 simple_strtol(name, NULL, 0);
166 param->tb[i + 1] = &param->attrs[i].attr;
167 i++;
169 if (i >= CRYPTO_MAX_ATTRS)
170 goto err_free_param;
172 if (*p == ')')
173 break;
175 if (*p != ',')
176 goto err_free_param;
179 if (!i)
180 goto err_free_param;
182 param->tb[i + 1] = NULL;
184 param->type.attr.rta_len = sizeof(param->type);
185 param->type.attr.rta_type = CRYPTOA_TYPE;
186 param->type.data.type = larval->alg.cra_flags & ~CRYPTO_ALG_TESTED;
187 param->type.data.mask = larval->mask & ~CRYPTO_ALG_TESTED;
188 param->tb[0] = &param->type.attr;
190 param->otype = larval->alg.cra_flags;
191 param->omask = larval->mask;
193 memcpy(param->larval, larval->alg.cra_name, CRYPTO_MAX_ALG_NAME);
195 thread = kthread_run(cryptomgr_probe, param, "cryptomgr_probe");
196 if (IS_ERR(thread))
197 goto err_free_param;
199 return NOTIFY_STOP;
201 err_free_param:
202 kfree(param);
203 err_put_module:
204 module_put(THIS_MODULE);
205 err:
206 return NOTIFY_OK;
209 static int cryptomgr_test(void *data)
211 struct crypto_test_param *param = data;
212 u32 type = param->type;
213 int err = 0;
215 #ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS
216 goto skiptest;
217 #endif
219 if (type & CRYPTO_ALG_TESTED)
220 goto skiptest;
222 err = alg_test(param->driver, param->alg, type, CRYPTO_ALG_TESTED);
224 skiptest:
225 crypto_alg_tested(param->driver, err);
227 kfree(param);
228 module_put_and_exit(0);
231 static int cryptomgr_schedule_test(struct crypto_alg *alg)
233 struct task_struct *thread;
234 struct crypto_test_param *param;
235 u32 type;
237 if (!try_module_get(THIS_MODULE))
238 goto err;
240 param = kzalloc(sizeof(*param), GFP_KERNEL);
241 if (!param)
242 goto err_put_module;
244 memcpy(param->driver, alg->cra_driver_name, sizeof(param->driver));
245 memcpy(param->alg, alg->cra_name, sizeof(param->alg));
246 type = alg->cra_flags;
248 /* This piece of crap needs to disappear into per-type test hooks. */
249 if ((!((type ^ CRYPTO_ALG_TYPE_BLKCIPHER) &
250 CRYPTO_ALG_TYPE_BLKCIPHER_MASK) && !(type & CRYPTO_ALG_GENIV) &&
251 ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
252 CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize :
253 alg->cra_ablkcipher.ivsize)) ||
254 (!((type ^ CRYPTO_ALG_TYPE_AEAD) & CRYPTO_ALG_TYPE_MASK) &&
255 alg->cra_type == &crypto_nivaead_type && alg->cra_aead.ivsize))
256 type |= CRYPTO_ALG_TESTED;
258 param->type = type;
260 thread = kthread_run(cryptomgr_test, param, "cryptomgr_test");
261 if (IS_ERR(thread))
262 goto err_free_param;
264 return NOTIFY_STOP;
266 err_free_param:
267 kfree(param);
268 err_put_module:
269 module_put(THIS_MODULE);
270 err:
271 return NOTIFY_OK;
274 static int cryptomgr_notify(struct notifier_block *this, unsigned long msg,
275 void *data)
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);
284 return NOTIFY_DONE;
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);
299 BUG_ON(err);
302 subsys_initcall(cryptomgr_init);
303 module_exit(cryptomgr_exit);
305 MODULE_LICENSE("GPL");
306 MODULE_DESCRIPTION("Crypto Algorithm Manager");