Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 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 | |
Herbert Xu | 6fe4a28 | 2009-02-18 21:41:29 +0800 | [diff] [blame] | 13 | #include <crypto/internal/aead.h> |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 14 | #include <linux/ctype.h> |
| 15 | #include <linux/err.h> |
| 16 | #include <linux/init.h> |
Herbert Xu | cf02f5d | 2007-03-29 17:32:59 +1000 | [diff] [blame] | 17 | #include <linux/kthread.h> |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 18 | #include <linux/module.h> |
| 19 | #include <linux/notifier.h> |
| 20 | #include <linux/rtnetlink.h> |
Herbert Xu | 6bfd480 | 2006-09-21 11:39:29 +1000 | [diff] [blame] | 21 | #include <linux/sched.h> |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 22 | #include <linux/string.h> |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 23 | |
| 24 | #include "internal.h" |
| 25 | |
| 26 | struct cryptomgr_param { |
Herbert Xu | 39e1ee0 | 2007-08-29 19:27:26 +0800 | [diff] [blame] | 27 | struct rtattr *tb[CRYPTO_MAX_ATTRS + 2]; |
Herbert Xu | ebc610e | 2007-01-01 18:37:02 +1100 | [diff] [blame] | 28 | |
| 29 | struct { |
| 30 | struct rtattr attr; |
| 31 | struct crypto_attr_type data; |
| 32 | } type; |
| 33 | |
Herbert Xu | 39e1ee0 | 2007-08-29 19:27:26 +0800 | [diff] [blame] | 34 | union { |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 35 | struct rtattr attr; |
Herbert Xu | 39e1ee0 | 2007-08-29 19:27:26 +0800 | [diff] [blame] | 36 | struct { |
| 37 | struct rtattr attr; |
| 38 | struct crypto_attr_alg data; |
| 39 | } alg; |
| 40 | struct { |
| 41 | struct rtattr attr; |
| 42 | struct crypto_attr_u32 data; |
| 43 | } nu32; |
| 44 | } attrs[CRYPTO_MAX_ATTRS]; |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 45 | |
Herbert Xu | 39e1ee0 | 2007-08-29 19:27:26 +0800 | [diff] [blame] | 46 | char larval[CRYPTO_MAX_ALG_NAME]; |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 47 | char template[CRYPTO_MAX_ALG_NAME]; |
Herbert Xu | 73d3864 | 2008-08-03 21:15:23 +0800 | [diff] [blame] | 48 | |
| 49 | u32 otype; |
| 50 | u32 omask; |
| 51 | }; |
| 52 | |
| 53 | struct crypto_test_param { |
| 54 | char driver[CRYPTO_MAX_ALG_NAME]; |
| 55 | char alg[CRYPTO_MAX_ALG_NAME]; |
| 56 | u32 type; |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 57 | }; |
| 58 | |
Herbert Xu | cf02f5d | 2007-03-29 17:32:59 +1000 | [diff] [blame] | 59 | static int cryptomgr_probe(void *data) |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 60 | { |
Herbert Xu | cf02f5d | 2007-03-29 17:32:59 +1000 | [diff] [blame] | 61 | struct cryptomgr_param *param = data; |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 62 | struct crypto_template *tmpl; |
| 63 | struct crypto_instance *inst; |
Herbert Xu | 6bfd480 | 2006-09-21 11:39:29 +1000 | [diff] [blame] | 64 | int err; |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 65 | |
| 66 | tmpl = crypto_lookup_template(param->template); |
| 67 | if (!tmpl) |
| 68 | goto err; |
| 69 | |
Herbert Xu | 6bfd480 | 2006-09-21 11:39:29 +1000 | [diff] [blame] | 70 | do { |
Herbert Xu | ebc610e | 2007-01-01 18:37:02 +1100 | [diff] [blame] | 71 | inst = tmpl->alloc(param->tb); |
Herbert Xu | 6bfd480 | 2006-09-21 11:39:29 +1000 | [diff] [blame] | 72 | if (IS_ERR(inst)) |
| 73 | err = PTR_ERR(inst); |
| 74 | else if ((err = crypto_register_instance(tmpl, inst))) |
| 75 | tmpl->free(inst); |
| 76 | } while (err == -EAGAIN && !signal_pending(current)); |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 77 | |
| 78 | crypto_tmpl_put(tmpl); |
| 79 | |
Herbert Xu | 6bfd480 | 2006-09-21 11:39:29 +1000 | [diff] [blame] | 80 | if (err) |
| 81 | goto err; |
| 82 | |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 83 | out: |
| 84 | kfree(param); |
Herbert Xu | cf02f5d | 2007-03-29 17:32:59 +1000 | [diff] [blame] | 85 | module_put_and_exit(0); |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 86 | |
| 87 | err: |
Herbert Xu | 73d3864 | 2008-08-03 21:15:23 +0800 | [diff] [blame] | 88 | crypto_larval_error(param->larval, param->otype, param->omask); |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 89 | goto out; |
| 90 | } |
| 91 | |
| 92 | static int cryptomgr_schedule_probe(struct crypto_larval *larval) |
| 93 | { |
Herbert Xu | 1605b84 | 2007-05-09 13:04:39 +1000 | [diff] [blame] | 94 | struct task_struct *thread; |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 95 | struct cryptomgr_param *param; |
| 96 | const char *name = larval->alg.cra_name; |
| 97 | const char *p; |
| 98 | unsigned int len; |
Herbert Xu | 39e1ee0 | 2007-08-29 19:27:26 +0800 | [diff] [blame] | 99 | int i; |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 100 | |
Herbert Xu | cf02f5d | 2007-03-29 17:32:59 +1000 | [diff] [blame] | 101 | if (!try_module_get(THIS_MODULE)) |
| 102 | goto err; |
| 103 | |
Herbert Xu | ebc610e | 2007-01-01 18:37:02 +1100 | [diff] [blame] | 104 | param = kzalloc(sizeof(*param), GFP_KERNEL); |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 105 | if (!param) |
Herbert Xu | cf02f5d | 2007-03-29 17:32:59 +1000 | [diff] [blame] | 106 | goto err_put_module; |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 107 | |
| 108 | for (p = name; isalnum(*p) || *p == '-' || *p == '_'; p++) |
| 109 | ; |
| 110 | |
| 111 | len = p - name; |
| 112 | if (!len || *p != '(') |
| 113 | goto err_free_param; |
| 114 | |
| 115 | memcpy(param->template, name, len); |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 116 | |
Herbert Xu | 39e1ee0 | 2007-08-29 19:27:26 +0800 | [diff] [blame] | 117 | i = 0; |
| 118 | for (;;) { |
| 119 | int notnum = 0; |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 120 | |
Herbert Xu | 39e1ee0 | 2007-08-29 19:27:26 +0800 | [diff] [blame] | 121 | name = ++p; |
| 122 | len = 0; |
| 123 | |
| 124 | for (; isalnum(*p) || *p == '-' || *p == '_'; p++) |
| 125 | notnum |= !isdigit(*p); |
| 126 | |
| 127 | if (*p == '(') { |
| 128 | int recursion = 0; |
| 129 | |
| 130 | for (;;) { |
| 131 | if (!*++p) |
| 132 | goto err_free_param; |
| 133 | if (*p == '(') |
| 134 | recursion++; |
| 135 | else if (*p == ')' && !recursion--) |
| 136 | break; |
| 137 | } |
| 138 | |
| 139 | notnum = 1; |
Herbert Xu | 720a650 | 2007-09-28 09:06:11 +0800 | [diff] [blame] | 140 | p++; |
Herbert Xu | 39e1ee0 | 2007-08-29 19:27:26 +0800 | [diff] [blame] | 141 | } |
Herbert Xu | cf02f5d | 2007-03-29 17:32:59 +1000 | [diff] [blame] | 142 | |
| 143 | len = p - name; |
Herbert Xu | 39e1ee0 | 2007-08-29 19:27:26 +0800 | [diff] [blame] | 144 | if (!len) |
| 145 | goto err_free_param; |
| 146 | |
| 147 | if (notnum) { |
| 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); |
| 152 | } else { |
| 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); |
| 158 | } |
| 159 | |
| 160 | param->tb[i + 1] = ¶m->attrs[i].attr; |
| 161 | i++; |
| 162 | |
Herbert Xu | 720a650 | 2007-09-28 09:06:11 +0800 | [diff] [blame] | 163 | if (i >= CRYPTO_MAX_ATTRS) |
Herbert Xu | 39e1ee0 | 2007-08-29 19:27:26 +0800 | [diff] [blame] | 164 | goto err_free_param; |
| 165 | |
| 166 | if (*p == ')') |
| 167 | break; |
| 168 | |
| 169 | if (*p != ',') |
| 170 | goto err_free_param; |
Herbert Xu | cf02f5d | 2007-03-29 17:32:59 +1000 | [diff] [blame] | 171 | } |
| 172 | |
Herbert Xu | 39e1ee0 | 2007-08-29 19:27:26 +0800 | [diff] [blame] | 173 | if (!i) |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 174 | goto err_free_param; |
| 175 | |
Herbert Xu | 39e1ee0 | 2007-08-29 19:27:26 +0800 | [diff] [blame] | 176 | param->tb[i + 1] = NULL; |
| 177 | |
Herbert Xu | ebc610e | 2007-01-01 18:37:02 +1100 | [diff] [blame] | 178 | param->type.attr.rta_len = sizeof(param->type); |
| 179 | param->type.attr.rta_type = CRYPTOA_TYPE; |
Herbert Xu | 73d3864 | 2008-08-03 21:15:23 +0800 | [diff] [blame] | 180 | param->type.data.type = larval->alg.cra_flags & ~CRYPTO_ALG_TESTED; |
| 181 | param->type.data.mask = larval->mask & ~CRYPTO_ALG_TESTED; |
Herbert Xu | 39e1ee0 | 2007-08-29 19:27:26 +0800 | [diff] [blame] | 182 | param->tb[0] = ¶m->type.attr; |
Herbert Xu | ebc610e | 2007-01-01 18:37:02 +1100 | [diff] [blame] | 183 | |
Herbert Xu | 73d3864 | 2008-08-03 21:15:23 +0800 | [diff] [blame] | 184 | param->otype = larval->alg.cra_flags; |
| 185 | param->omask = larval->mask; |
| 186 | |
Herbert Xu | 39e1ee0 | 2007-08-29 19:27:26 +0800 | [diff] [blame] | 187 | memcpy(param->larval, larval->alg.cra_name, CRYPTO_MAX_ALG_NAME); |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 188 | |
Herbert Xu | 73d3864 | 2008-08-03 21:15:23 +0800 | [diff] [blame] | 189 | thread = kthread_run(cryptomgr_probe, param, "cryptomgr_probe"); |
| 190 | if (IS_ERR(thread)) |
| 191 | goto err_free_param; |
| 192 | |
| 193 | return NOTIFY_STOP; |
| 194 | |
| 195 | err_free_param: |
| 196 | kfree(param); |
| 197 | err_put_module: |
| 198 | module_put(THIS_MODULE); |
| 199 | err: |
| 200 | return NOTIFY_OK; |
| 201 | } |
| 202 | |
| 203 | static int cryptomgr_test(void *data) |
| 204 | { |
| 205 | struct crypto_test_param *param = data; |
| 206 | u32 type = param->type; |
| 207 | int err = 0; |
| 208 | |
Herbert Xu | 6fe4a28 | 2009-02-18 21:41:29 +0800 | [diff] [blame] | 209 | if (type & CRYPTO_ALG_TESTED) |
Herbert Xu | 73d3864 | 2008-08-03 21:15:23 +0800 | [diff] [blame] | 210 | goto skiptest; |
| 211 | |
Herbert Xu | 1aa4ecd | 2008-08-17 17:01:56 +1000 | [diff] [blame] | 212 | err = alg_test(param->driver, param->alg, type, CRYPTO_ALG_TESTED); |
Herbert Xu | 73d3864 | 2008-08-03 21:15:23 +0800 | [diff] [blame] | 213 | |
| 214 | skiptest: |
| 215 | crypto_alg_tested(param->driver, err); |
| 216 | |
| 217 | kfree(param); |
| 218 | module_put_and_exit(0); |
| 219 | } |
| 220 | |
| 221 | static int cryptomgr_schedule_test(struct crypto_alg *alg) |
| 222 | { |
| 223 | struct task_struct *thread; |
| 224 | struct crypto_test_param *param; |
Herbert Xu | 6fe4a28 | 2009-02-18 21:41:29 +0800 | [diff] [blame] | 225 | u32 type; |
Herbert Xu | 73d3864 | 2008-08-03 21:15:23 +0800 | [diff] [blame] | 226 | |
| 227 | if (!try_module_get(THIS_MODULE)) |
| 228 | goto err; |
| 229 | |
| 230 | param = kzalloc(sizeof(*param), GFP_KERNEL); |
| 231 | if (!param) |
| 232 | goto err_put_module; |
| 233 | |
| 234 | memcpy(param->driver, alg->cra_driver_name, sizeof(param->driver)); |
| 235 | memcpy(param->alg, alg->cra_name, sizeof(param->alg)); |
Herbert Xu | 6fe4a28 | 2009-02-18 21:41:29 +0800 | [diff] [blame] | 236 | type = alg->cra_flags; |
| 237 | |
| 238 | /* This piece of crap needs to disappear into per-type test hooks. */ |
| 239 | if ((!((type ^ CRYPTO_ALG_TYPE_BLKCIPHER) & |
| 240 | CRYPTO_ALG_TYPE_BLKCIPHER_MASK) && !(type & CRYPTO_ALG_GENIV) && |
| 241 | ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == |
| 242 | CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize : |
| 243 | alg->cra_ablkcipher.ivsize)) || |
| 244 | (!((type ^ CRYPTO_ALG_TYPE_AEAD) & CRYPTO_ALG_TYPE_MASK) && |
| 245 | alg->cra_type == &crypto_nivaead_type && alg->cra_aead.ivsize)) |
| 246 | type |= CRYPTO_ALG_TESTED; |
| 247 | |
| 248 | param->type = type; |
Herbert Xu | 73d3864 | 2008-08-03 21:15:23 +0800 | [diff] [blame] | 249 | |
| 250 | thread = kthread_run(cryptomgr_test, param, "cryptomgr_test"); |
Herbert Xu | 1605b84 | 2007-05-09 13:04:39 +1000 | [diff] [blame] | 251 | if (IS_ERR(thread)) |
Herbert Xu | cf02f5d | 2007-03-29 17:32:59 +1000 | [diff] [blame] | 252 | goto err_free_param; |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 253 | |
| 254 | return NOTIFY_STOP; |
| 255 | |
| 256 | err_free_param: |
| 257 | kfree(param); |
Herbert Xu | cf02f5d | 2007-03-29 17:32:59 +1000 | [diff] [blame] | 258 | err_put_module: |
| 259 | module_put(THIS_MODULE); |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 260 | err: |
| 261 | return NOTIFY_OK; |
| 262 | } |
| 263 | |
| 264 | static 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); |
Herbert Xu | 73d3864 | 2008-08-03 21:15:23 +0800 | [diff] [blame] | 270 | case CRYPTO_MSG_ALG_REGISTER: |
| 271 | return cryptomgr_schedule_test(data); |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | return NOTIFY_DONE; |
| 275 | } |
| 276 | |
| 277 | static struct notifier_block cryptomgr_notifier = { |
| 278 | .notifier_call = cryptomgr_notify, |
| 279 | }; |
| 280 | |
| 281 | static int __init cryptomgr_init(void) |
| 282 | { |
Herbert Xu | f8b0d4d | 2009-05-06 14:15:47 +0800 | [diff] [blame^] | 283 | return crypto_register_notifier(&cryptomgr_notifier); |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | static void __exit cryptomgr_exit(void) |
| 287 | { |
| 288 | int err = crypto_unregister_notifier(&cryptomgr_notifier); |
| 289 | BUG_ON(err); |
| 290 | } |
| 291 | |
Herbert Xu | da7f033 | 2008-07-31 17:08:25 +0800 | [diff] [blame] | 292 | subsys_initcall(cryptomgr_init); |
Herbert Xu | 2b8c19d | 2006-09-21 11:31:44 +1000 | [diff] [blame] | 293 | module_exit(cryptomgr_exit); |
| 294 | |
| 295 | MODULE_LICENSE("GPL"); |
| 296 | MODULE_DESCRIPTION("Crypto Algorithm Manager"); |