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/module.h>
18 #include <linux/notifier.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/string.h>
21 #include <linux/workqueue.h>
25 struct cryptomgr_param {
26 struct work_struct work;
30 struct crypto_attr_alg data;
36 char name[CRYPTO_MAX_ALG_NAME];
39 char template[CRYPTO_MAX_ALG_NAME];
42 static void cryptomgr_probe(void *data)
44 struct cryptomgr_param *param = data;
45 struct crypto_template *tmpl;
46 struct crypto_instance *inst;
48 tmpl = crypto_lookup_template(param->template);
52 inst = tmpl->alloc(¶m->alg, sizeof(param->alg));
55 else if ((err = crypto_register_instance(tmpl, inst))) {
60 crypto_tmpl_put(tmpl);
67 crypto_larval_error(param->larval.name, param->larval.type,
72 static int cryptomgr_schedule_probe(struct crypto_larval *larval)
74 struct cryptomgr_param *param;
75 const char *name = larval->alg.cra_name;
79 param = kmalloc(sizeof(*param), GFP_KERNEL);
83 for (p = name; isalnum(*p) || *p == '-' || *p == '_'; p++)
87 if (!len || *p != '(')
90 memcpy(param->template, name, len);
91 param->template[len] = 0;
94 for (p = name; isalnum(*p) || *p == '-' || *p == '_'; p++)
98 if (!len || *p != ')' || p[1])
101 param->alg.attr.rta_len = sizeof(param->alg);
102 param->alg.attr.rta_type = CRYPTOA_ALG;
103 memcpy(param->alg.data.name, name, len);
104 param->alg.data.name[len] = 0;
106 memcpy(param->larval.name, larval->alg.cra_name, CRYPTO_MAX_ALG_NAME);
107 param->larval.type = larval->alg.cra_flags;
108 param->larval.mask = larval->mask;
110 INIT_WORK(¶m->work, cryptomgr_probe, param);
111 schedule_work(¶m->work);
121 static int cryptomgr_notify(struct notifier_block *this, unsigned long msg,
125 case CRYPTO_MSG_ALG_REQUEST:
126 return cryptomgr_schedule_probe(data);
132 static struct notifier_block cryptomgr_notifier = {
133 .notifier_call = cryptomgr_notify,
136 static int __init cryptomgr_init(void)
138 return crypto_register_notifier(&cryptomgr_notifier);
141 static void __exit cryptomgr_exit(void)
143 int err = crypto_unregister_notifier(&cryptomgr_notifier);
147 module_init(cryptomgr_init);
148 module_exit(cryptomgr_exit);
150 MODULE_LICENSE("GPL");
151 MODULE_DESCRIPTION("Crypto Algorithm Manager");