--- /dev/null
+/*
+ * Create default crypto algorithm instances.
+ *
+ * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+
+#include <crypto/internal/aead.h>
+#include <linux/completion.h>
+#include <linux/ctype.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kthread.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/rtnetlink.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#include "internal.h"
+
+struct cryptomgr_param {
+ struct rtattr *tb[CRYPTO_MAX_ATTRS + 2];
+
+ struct {
+ struct rtattr attr;
+ struct crypto_attr_type data;
+ } type;
+
+ union {
+ struct rtattr attr;
+ struct {
+ struct rtattr attr;
+ struct crypto_attr_alg data;
+ } alg;
+ struct {
+ struct rtattr attr;
+ struct crypto_attr_u32 data;
+ } nu32;
+ } attrs[CRYPTO_MAX_ATTRS];
+
+ char template[CRYPTO_MAX_ALG_NAME];
+
+ struct crypto_larval *larval;
+
+ u32 otype;
+ u32 omask;
+};
+
+struct crypto_test_param {
+ char driver[CRYPTO_MAX_ALG_NAME];
+ char alg[CRYPTO_MAX_ALG_NAME];
+ u32 type;
+};
+
+static int cryptomgr_probe(void *data)
+{
+ struct cryptomgr_param *param = data;
+ struct crypto_template *tmpl;
+ struct crypto_instance *inst;
+ int err;
+
+ tmpl = crypto_lookup_template(param->template);
+ if (!tmpl)
+ goto out;
+
+ do {
+ if (tmpl->create) {
+ err = tmpl->create(tmpl, param->tb);
+ continue;
+ }
+
+ inst = tmpl->alloc(param->tb);
+ if (IS_ERR(inst))
+ err = PTR_ERR(inst);
+ else if ((err = crypto_register_instance(tmpl, inst)))
+ tmpl->free(inst);
+ } while (err == -EAGAIN && !signal_pending(current));
+
+ crypto_tmpl_put(tmpl);
+
+out:
+ complete_all(¶m->larval->completion);
+ crypto_alg_put(¶m->larval->alg);
+ kfree(param);
+ module_put_and_exit(0);
+}
+
+static int cryptomgr_schedule_probe(struct crypto_larval *larval)
+{
+ struct task_struct *thread;
+ struct cryptomgr_param *param;
+ const char *name = larval->alg.cra_name;
+ const char *p;
+ unsigned int len;
+ int i;
+
+ if (!try_module_get(THIS_MODULE))
+ goto err;
+
+ param = kzalloc(sizeof(*param), GFP_KERNEL);
+ if (!param)
+ goto err_put_module;
+
+ for (p = name; isalnum(*p) || *p == '-' || *p == '_'; p++)
+ ;
+
+ len = p - name;
+ if (!len || *p != '(')
+ goto err_free_param;
+
+ memcpy(param->template, name, len);
+
+ i = 0;
+ for (;;) {
+ int notnum = 0;
+
+ name = ++p;
+ len = 0;
+
+ for (; isalnum(*p) || *p == '-' || *p == '_'; p++)
+ notnum |= !isdigit(*p);
+
+ if (*p == '(') {
+ int recursion = 0;
+
+ for (;;) {
+ if (!*++p)
+ goto err_free_param;
+ if (*p == '(')
+ recursion++;
+ else if (*p == ')' && !recursion--)
+ break;
+ }
+
+ notnum = 1;
+ p++;
+ }
+
+ len = p - name;
+ if (!len)
+ goto err_free_param;
+
+ if (notnum) {
+ param->attrs[i].alg.attr.rta_len =
+ sizeof(param->attrs[i].alg);
+ param->attrs[i].alg.attr.rta_type = CRYPTOA_ALG;
+ memcpy(param->attrs[i].alg.data.name, name, len);
+ } else {
+ param->attrs[i].nu32.attr.rta_len =
+ sizeof(param->attrs[i].nu32);
+ param->attrs[i].nu32.attr.rta_type = CRYPTOA_U32;
+ param->attrs[i].nu32.data.num =
+ simple_strtol(name, NULL, 0);
+ }
+
+ param->tb[i + 1] = ¶m->attrs[i].attr;
+ i++;
+
+ if (i >= CRYPTO_MAX_ATTRS)
+ goto err_free_param;
+
+ if (*p == ')')
+ break;
+
+ if (*p != ',')
+ goto err_free_param;
+ }
+
+ if (!i)
+ goto err_free_param;
+
+ param->tb[i + 1] = NULL;
+
+ param->type.attr.rta_len = sizeof(param->type);
+ param->type.attr.rta_type = CRYPTOA_TYPE;
+ param->type.data.type = larval->alg.cra_flags & ~CRYPTO_ALG_TESTED;
+ param->type.data.mask = larval->mask & ~CRYPTO_ALG_TESTED;
+ param->tb[0] = ¶m->type.attr;
+
+ param->otype = larval->alg.cra_flags;
+ param->omask = larval->mask;
+
+ crypto_alg_get(&larval->alg);
+ param->larval = larval;
+
+ thread = kthread_run(cryptomgr_probe, param, "cryptomgr_probe");
+ if (IS_ERR(thread))
+ goto err_put_larval;
+
+ wait_for_completion_interruptible(&larval->completion);
+
+ return NOTIFY_STOP;
+
+err_put_larval:
+ crypto_alg_put(&larval->alg);
+err_free_param:
+ kfree(param);
+err_put_module:
+ module_put(THIS_MODULE);
+err:
+ return NOTIFY_OK;
+}
+
+static int cryptomgr_test(void *data)
+{
+ struct crypto_test_param *param = data;
+ u32 type = param->type;
+ int err = 0;
+
+#ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS
+ goto skiptest;
+#endif
+
+ if (type & CRYPTO_ALG_TESTED)
+ goto skiptest;
+
+ err = alg_test(param->driver, param->alg, type, CRYPTO_ALG_TESTED);
+
+skiptest:
+ crypto_alg_tested(param->driver, err);
+
+ kfree(param);
+ module_put_and_exit(0);
+}
+
+static int cryptomgr_schedule_test(struct crypto_alg *alg)
+{
+ struct task_struct *thread;
+ struct crypto_test_param *param;
+ u32 type;
+
+ if (!try_module_get(THIS_MODULE))
+ goto err;
+
+ param = kzalloc(sizeof(*param), GFP_KERNEL);
+ if (!param)
+ goto err_put_module;
+
+ memcpy(param->driver, alg->cra_driver_name, sizeof(param->driver));
+ memcpy(param->alg, alg->cra_name, sizeof(param->alg));
+ type = alg->cra_flags;
+
+ /* This piece of crap needs to disappear into per-type test hooks. */
+ if ((!((type ^ CRYPTO_ALG_TYPE_BLKCIPHER) &
+ CRYPTO_ALG_TYPE_BLKCIPHER_MASK) && !(type & CRYPTO_ALG_GENIV) &&
+ ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
+ CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize :
+ alg->cra_ablkcipher.ivsize)) ||
+ (!((type ^ CRYPTO_ALG_TYPE_AEAD) & CRYPTO_ALG_TYPE_MASK) &&
+ alg->cra_type == &crypto_nivaead_type && alg->cra_aead.ivsize))
+ type |= CRYPTO_ALG_TESTED;
+
+ param->type = type;
+
+ thread = kthread_run(cryptomgr_test, param, "cryptomgr_test");
+ if (IS_ERR(thread))
+ goto err_free_param;
+
+ return NOTIFY_STOP;
+
+err_free_param:
+ kfree(param);
+err_put_module:
+ module_put(THIS_MODULE);
+err:
+ return NOTIFY_OK;
+}
+
+static int cryptomgr_notify(struct notifier_block *this, unsigned long msg,
+ void *data)
+{
+ switch (msg) {
+ case CRYPTO_MSG_ALG_REQUEST:
+ return cryptomgr_schedule_probe(data);
+ case CRYPTO_MSG_ALG_REGISTER:
+ return cryptomgr_schedule_test(data);
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block cryptomgr_notifier = {
+ .notifier_call = cryptomgr_notify,
+};
+
+static int __init cryptomgr_init(void)
+{
+ return crypto_register_notifier(&cryptomgr_notifier);
+}
+
+static void __exit cryptomgr_exit(void)
+{
+ int err = crypto_unregister_notifier(&cryptomgr_notifier);
+ BUG_ON(err);
+}
+
+subsys_initcall(cryptomgr_init);
+module_exit(cryptomgr_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Crypto Algorithm Manager");
Code Review / kvmfornfv.git / blobdiff