#include "internal.h"
+static void crypto_remove_final(struct list_head *list);
+
static LIST_HEAD(crypto_template_list);
void crypto_larval_error(const char *name, u32 type, u32 mask)
{
struct crypto_alg *alg;
- down_read(&crypto_alg_sem);
- alg = __crypto_alg_lookup(name, type, mask);
- up_read(&crypto_alg_sem);
+ alg = crypto_alg_lookup(name, type, mask);
if (alg) {
if (crypto_is_larval(alg)) {
struct crypto_larval *larval = (void *)alg;
- complete(&larval->completion);
+ complete_all(&larval->completion);
}
crypto_mod_put(alg);
}
if (alg->cra_alignmask & (alg->cra_alignmask + 1))
return -EINVAL;
- if (alg->cra_alignmask & alg->cra_blocksize)
- return -EINVAL;
-
if (alg->cra_blocksize > PAGE_SIZE / 8)
return -EINVAL;
crypto_tmpl_put(tmpl);
}
-static void crypto_remove_spawns(struct list_head *spawns,
- struct list_head *list)
+static struct list_head *crypto_more_spawns(struct crypto_alg *alg,
+ struct list_head *stack,
+ struct list_head *top,
+ struct list_head *secondary_spawns)
{
struct crypto_spawn *spawn, *n;
- list_for_each_entry_safe(spawn, n, spawns, list) {
- struct crypto_instance *inst = spawn->inst;
- struct crypto_template *tmpl = inst->tmpl;
+ if (list_empty(stack))
+ return NULL;
- list_del_init(&spawn->list);
- spawn->alg = NULL;
+ spawn = list_first_entry(stack, struct crypto_spawn, list);
+ n = list_entry(spawn->list.next, struct crypto_spawn, list);
- if (crypto_is_dead(&inst->alg))
- continue;
+ if (spawn->alg && &n->list != stack && !n->alg)
+ n->alg = (n->list.next == stack) ? alg :
+ &list_entry(n->list.next, struct crypto_spawn,
+ list)->inst->alg;
+
+ list_move(&spawn->list, secondary_spawns);
+
+ return &n->list == stack ? top : &n->inst->alg.cra_users;
+}
+
+static void crypto_remove_spawn(struct crypto_spawn *spawn,
+ struct list_head *list)
+{
+ struct crypto_instance *inst = spawn->inst;
+ struct crypto_template *tmpl = inst->tmpl;
+
+ if (crypto_is_dead(&inst->alg))
+ return;
+
+ inst->alg.cra_flags |= CRYPTO_ALG_DEAD;
+ if (hlist_unhashed(&inst->list))
+ return;
+
+ if (!tmpl || !crypto_tmpl_get(tmpl))
+ return;
- inst->alg.cra_flags |= CRYPTO_ALG_DEAD;
- if (!tmpl || !crypto_tmpl_get(tmpl))
+ crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, &inst->alg);
+ list_move(&inst->alg.cra_list, list);
+ hlist_del(&inst->list);
+ inst->alg.cra_destroy = crypto_destroy_instance;
+
+ BUG_ON(!list_empty(&inst->alg.cra_users));
+}
+
+static void crypto_remove_spawns(struct crypto_alg *alg,
+ struct list_head *list,
+ struct crypto_alg *nalg)
+{
+ u32 new_type = (nalg ?: alg)->cra_flags;
+ struct crypto_spawn *spawn, *n;
+ LIST_HEAD(secondary_spawns);
+ struct list_head *spawns;
+ LIST_HEAD(stack);
+ LIST_HEAD(top);
+
+ spawns = &alg->cra_users;
+ list_for_each_entry_safe(spawn, n, spawns, list) {
+ if ((spawn->alg->cra_flags ^ new_type) & spawn->mask)
continue;
- crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, &inst->alg);
- list_move(&inst->alg.cra_list, list);
- hlist_del(&inst->list);
- inst->alg.cra_destroy = crypto_destroy_instance;
+ list_move(&spawn->list, &top);
+ }
- if (!list_empty(&inst->alg.cra_users)) {
- if (&n->list == spawns)
- n = list_entry(inst->alg.cra_users.next,
- typeof(*n), list);
- __list_splice(&inst->alg.cra_users, spawns->prev);
+ spawns = ⊤
+ do {
+ while (!list_empty(spawns)) {
+ struct crypto_instance *inst;
+
+ spawn = list_first_entry(spawns, struct crypto_spawn,
+ list);
+ inst = spawn->inst;
+
+ BUG_ON(&inst->alg == alg);
+
+ list_move(&spawn->list, &stack);
+
+ if (&inst->alg == nalg)
+ break;
+
+ spawn->alg = NULL;
+ spawns = &inst->alg.cra_users;
}
+ } while ((spawns = crypto_more_spawns(alg, &stack, &top,
+ &secondary_spawns)));
+
+ list_for_each_entry_safe(spawn, n, &secondary_spawns, list) {
+ if (spawn->alg)
+ list_move(&spawn->list, &spawn->alg->cra_users);
+ else
+ crypto_remove_spawn(spawn, list);
}
}
-static int __crypto_register_alg(struct crypto_alg *alg,
- struct list_head *list)
+static struct crypto_larval *__crypto_register_alg(struct crypto_alg *alg)
{
struct crypto_alg *q;
+ struct crypto_larval *larval;
int ret = -EAGAIN;
if (crypto_is_dead(alg))
- goto out;
+ goto err;
INIT_LIST_HEAD(&alg->cra_users);
+ /* No cheating! */
+ alg->cra_flags &= ~CRYPTO_ALG_TESTED;
+
ret = -EEXIST;
atomic_set(&alg->cra_refcnt, 1);
list_for_each_entry(q, &crypto_alg_list, cra_list) {
if (q == alg)
- goto out;
+ goto err;
+
+ if (crypto_is_moribund(q))
+ continue;
+
+ if (crypto_is_larval(q)) {
+ if (!strcmp(alg->cra_driver_name, q->cra_driver_name))
+ goto err;
+ continue;
+ }
+
+ if (!strcmp(q->cra_driver_name, alg->cra_name) ||
+ !strcmp(q->cra_name, alg->cra_driver_name))
+ goto err;
+ }
+
+ larval = crypto_larval_alloc(alg->cra_name,
+ alg->cra_flags | CRYPTO_ALG_TESTED, 0);
+ if (IS_ERR(larval))
+ goto out;
+
+ ret = -ENOENT;
+ larval->adult = crypto_mod_get(alg);
+ if (!larval->adult)
+ goto free_larval;
+
+ atomic_set(&larval->alg.cra_refcnt, 1);
+ memcpy(larval->alg.cra_driver_name, alg->cra_driver_name,
+ CRYPTO_MAX_ALG_NAME);
+ larval->alg.cra_priority = alg->cra_priority;
+
+ list_add(&alg->cra_list, &crypto_alg_list);
+ list_add(&larval->alg.cra_list, &crypto_alg_list);
+
+out:
+ return larval;
+
+free_larval:
+ kfree(larval);
+err:
+ larval = ERR_PTR(ret);
+ goto out;
+}
+
+void crypto_alg_tested(const char *name, int err)
+{
+ struct crypto_larval *test;
+ struct crypto_alg *alg;
+ struct crypto_alg *q;
+ LIST_HEAD(list);
+
+ down_write(&crypto_alg_sem);
+ list_for_each_entry(q, &crypto_alg_list, cra_list) {
+ if (crypto_is_moribund(q) || !crypto_is_larval(q))
+ continue;
+
+ test = (struct crypto_larval *)q;
+
+ if (!strcmp(q->cra_driver_name, name))
+ goto found;
+ }
+
+ printk(KERN_ERR "alg: Unexpected test result for %s: %d\n", name, err);
+ goto unlock;
+
+found:
+ q->cra_flags |= CRYPTO_ALG_DEAD;
+ alg = test->adult;
+ if (err || list_empty(&alg->cra_list))
+ goto complete;
+
+ alg->cra_flags |= CRYPTO_ALG_TESTED;
+
+ list_for_each_entry(q, &crypto_alg_list, cra_list) {
+ if (q == alg)
+ continue;
if (crypto_is_moribund(q))
continue;
if (crypto_is_larval(q)) {
struct crypto_larval *larval = (void *)q;
+ /*
+ * Check to see if either our generic name or
+ * specific name can satisfy the name requested
+ * by the larval entry q.
+ */
if (strcmp(alg->cra_name, q->cra_name) &&
strcmp(alg->cra_driver_name, q->cra_name))
continue;
continue;
larval->adult = alg;
- complete(&larval->completion);
+ complete_all(&larval->completion);
continue;
}
q->cra_priority > alg->cra_priority)
continue;
- crypto_remove_spawns(&q->cra_users, list);
+ crypto_remove_spawns(q, &list, alg);
}
-
- list_add(&alg->cra_list, &crypto_alg_list);
- crypto_notify(CRYPTO_MSG_ALG_REGISTER, alg);
- ret = 0;
+complete:
+ complete_all(&test->completion);
-out:
- return ret;
+unlock:
+ up_write(&crypto_alg_sem);
+
+ crypto_remove_final(&list);
}
+EXPORT_SYMBOL_GPL(crypto_alg_tested);
static void crypto_remove_final(struct list_head *list)
{
}
}
+static void crypto_wait_for_test(struct crypto_larval *larval)
+{
+ int err;
+
+ err = crypto_probing_notify(CRYPTO_MSG_ALG_REGISTER, larval->adult);
+ if (err != NOTIFY_STOP) {
+ if (WARN_ON(err != NOTIFY_DONE))
+ goto out;
+ crypto_alg_tested(larval->alg.cra_driver_name, 0);
+ }
+
+ err = wait_for_completion_interruptible(&larval->completion);
+ WARN_ON(err);
+
+out:
+ crypto_larval_kill(&larval->alg);
+}
+
int crypto_register_alg(struct crypto_alg *alg)
{
- LIST_HEAD(list);
+ struct crypto_larval *larval;
int err;
err = crypto_check_alg(alg);
return err;
down_write(&crypto_alg_sem);
- err = __crypto_register_alg(alg, &list);
+ larval = __crypto_register_alg(alg);
up_write(&crypto_alg_sem);
- crypto_remove_final(&list);
- return err;
+ if (IS_ERR(larval))
+ return PTR_ERR(larval);
+
+ crypto_wait_for_test(larval);
+ return 0;
}
EXPORT_SYMBOL_GPL(crypto_register_alg);
crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, alg);
list_del_init(&alg->cra_list);
- crypto_remove_spawns(&alg->cra_users, list);
+ crypto_remove_spawns(alg, list, NULL);
return 0;
}
int crypto_register_instance(struct crypto_template *tmpl,
struct crypto_instance *inst)
{
- LIST_HEAD(list);
- int err = -EINVAL;
-
- if (inst->alg.cra_destroy)
- goto err;
+ struct crypto_larval *larval;
+ int err;
err = crypto_check_alg(&inst->alg);
if (err)
down_write(&crypto_alg_sem);
- err = __crypto_register_alg(&inst->alg, &list);
- if (err)
+ larval = __crypto_register_alg(&inst->alg);
+ if (IS_ERR(larval))
goto unlock;
hlist_add_head(&inst->list, &tmpl->instances);
unlock:
up_write(&crypto_alg_sem);
- crypto_remove_final(&list);
+ err = PTR_ERR(larval);
+ if (IS_ERR(larval))
+ goto err;
+
+ crypto_wait_for_test(larval);
+ err = 0;
err:
return err;
EXPORT_SYMBOL_GPL(crypto_register_instance);
int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
- struct crypto_instance *inst)
+ struct crypto_instance *inst, u32 mask)
{
int err = -EAGAIN;
spawn->inst = inst;
+ spawn->mask = mask;
down_write(&crypto_alg_sem);
if (!crypto_is_moribund(alg)) {
}
EXPORT_SYMBOL_GPL(crypto_init_spawn);
+int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
+ struct crypto_instance *inst,
+ const struct crypto_type *frontend)
+{
+ int err = -EINVAL;
+
+ if (frontend && (alg->cra_flags ^ frontend->type) & frontend->maskset)
+ goto out;
+
+ spawn->frontend = frontend;
+ err = crypto_init_spawn(spawn, alg, inst, frontend->maskset);
+
+out:
+ return err;
+}
+EXPORT_SYMBOL_GPL(crypto_init_spawn2);
+
void crypto_drop_spawn(struct crypto_spawn *spawn)
{
+ if (!spawn->alg)
+ return;
+
down_write(&crypto_alg_sem);
list_del(&spawn->list);
up_write(&crypto_alg_sem);
}
EXPORT_SYMBOL_GPL(crypto_drop_spawn);
-struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
- u32 mask)
+static struct crypto_alg *crypto_spawn_alg(struct crypto_spawn *spawn)
{
struct crypto_alg *alg;
struct crypto_alg *alg2;
- struct crypto_tfm *tfm;
down_read(&crypto_alg_sem);
alg = spawn->alg;
return ERR_PTR(-EAGAIN);
}
+ return alg;
+}
+
+struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
+ u32 mask)
+{
+ struct crypto_alg *alg;
+ struct crypto_tfm *tfm;
+
+ alg = crypto_spawn_alg(spawn);
+ if (IS_ERR(alg))
+ return ERR_CAST(alg);
+
tfm = ERR_PTR(-EINVAL);
if (unlikely((alg->cra_flags ^ type) & mask))
goto out_put_alg;
- tfm = __crypto_alloc_tfm(alg);
+ tfm = __crypto_alloc_tfm(alg, type, mask);
if (IS_ERR(tfm))
goto out_put_alg;
}
EXPORT_SYMBOL_GPL(crypto_spawn_tfm);
+void *crypto_spawn_tfm2(struct crypto_spawn *spawn)
+{
+ struct crypto_alg *alg;
+ struct crypto_tfm *tfm;
+
+ alg = crypto_spawn_alg(spawn);
+ if (IS_ERR(alg))
+ return ERR_CAST(alg);
+
+ tfm = crypto_create_tfm(alg, spawn->frontend);
+ if (IS_ERR(tfm))
+ goto out_put_alg;
+
+ return tfm;
+
+out_put_alg:
+ crypto_mod_put(alg);
+ return tfm;
+}
+EXPORT_SYMBOL_GPL(crypto_spawn_tfm2);
+
int crypto_register_notifier(struct notifier_block *nb)
{
return blocking_notifier_chain_register(&crypto_chain, nb);
}
EXPORT_SYMBOL_GPL(crypto_unregister_notifier);
-struct crypto_alg *crypto_get_attr_alg(void *param, unsigned int len,
- u32 type, u32 mask)
+struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb)
+{
+ struct rtattr *rta = tb[0];
+ struct crypto_attr_type *algt;
+
+ if (!rta)
+ return ERR_PTR(-ENOENT);
+ if (RTA_PAYLOAD(rta) < sizeof(*algt))
+ return ERR_PTR(-EINVAL);
+ if (rta->rta_type != CRYPTOA_TYPE)
+ return ERR_PTR(-EINVAL);
+
+ algt = RTA_DATA(rta);
+
+ return algt;
+}
+EXPORT_SYMBOL_GPL(crypto_get_attr_type);
+
+int crypto_check_attr_type(struct rtattr **tb, u32 type)
+{
+ struct crypto_attr_type *algt;
+
+ algt = crypto_get_attr_type(tb);
+ if (IS_ERR(algt))
+ return PTR_ERR(algt);
+
+ if ((algt->type ^ type) & algt->mask)
+ return -EINVAL;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_check_attr_type);
+
+const char *crypto_attr_alg_name(struct rtattr *rta)
{
- struct rtattr *rta = param;
struct crypto_attr_alg *alga;
- if (!RTA_OK(rta, len))
- return ERR_PTR(-EBADR);
- if (rta->rta_type != CRYPTOA_ALG || RTA_PAYLOAD(rta) < sizeof(*alga))
+ if (!rta)
+ return ERR_PTR(-ENOENT);
+ if (RTA_PAYLOAD(rta) < sizeof(*alga))
+ return ERR_PTR(-EINVAL);
+ if (rta->rta_type != CRYPTOA_ALG)
return ERR_PTR(-EINVAL);
alga = RTA_DATA(rta);
alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0;
- return crypto_alg_mod_lookup(alga->name, type, mask);
+ return alga->name;
}
-EXPORT_SYMBOL_GPL(crypto_get_attr_alg);
+EXPORT_SYMBOL_GPL(crypto_attr_alg_name);
-struct crypto_instance *crypto_alloc_instance(const char *name,
- struct crypto_alg *alg)
+struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
+ const struct crypto_type *frontend,
+ u32 type, u32 mask)
+{
+ const char *name;
+ int err;
+
+ name = crypto_attr_alg_name(rta);
+ err = PTR_ERR(name);
+ if (IS_ERR(name))
+ return ERR_PTR(err);
+
+ return crypto_find_alg(name, frontend, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_attr_alg2);
+
+int crypto_attr_u32(struct rtattr *rta, u32 *num)
+{
+ struct crypto_attr_u32 *nu32;
+
+ if (!rta)
+ return -ENOENT;
+ if (RTA_PAYLOAD(rta) < sizeof(*nu32))
+ return -EINVAL;
+ if (rta->rta_type != CRYPTOA_U32)
+ return -EINVAL;
+
+ nu32 = RTA_DATA(rta);
+ *num = nu32->num;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_attr_u32);
+
+void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
+ unsigned int head)
{
struct crypto_instance *inst;
- struct crypto_spawn *spawn;
+ char *p;
int err;
- inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
- if (!inst)
+ p = kzalloc(head + sizeof(*inst) + sizeof(struct crypto_spawn),
+ GFP_KERNEL);
+ if (!p)
return ERR_PTR(-ENOMEM);
+ inst = (void *)(p + head);
+
err = -ENAMETOOLONG;
if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, "%s(%s)", name,
alg->cra_name) >= CRYPTO_MAX_ALG_NAME)
name, alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
goto err_free_inst;
+ return p;
+
+err_free_inst:
+ kfree(p);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(crypto_alloc_instance2);
+
+struct crypto_instance *crypto_alloc_instance(const char *name,
+ struct crypto_alg *alg)
+{
+ struct crypto_instance *inst;
+ struct crypto_spawn *spawn;
+ int err;
+
+ inst = crypto_alloc_instance2(name, alg, 0);
+ if (IS_ERR(inst))
+ goto out;
+
spawn = crypto_instance_ctx(inst);
- err = crypto_init_spawn(spawn, alg, inst);
+ err = crypto_init_spawn(spawn, alg, inst,
+ CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
if (err)
goto err_free_inst;
err_free_inst:
kfree(inst);
- return ERR_PTR(err);
+ inst = ERR_PTR(err);
+
+out:
+ return inst;
}
EXPORT_SYMBOL_GPL(crypto_alloc_instance);
+void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen)
+{
+ INIT_LIST_HEAD(&queue->list);
+ queue->backlog = &queue->list;
+ queue->qlen = 0;
+ queue->max_qlen = max_qlen;
+}
+EXPORT_SYMBOL_GPL(crypto_init_queue);
+
+int crypto_enqueue_request(struct crypto_queue *queue,
+ struct crypto_async_request *request)
+{
+ int err = -EINPROGRESS;
+
+ if (unlikely(queue->qlen >= queue->max_qlen)) {
+ err = -EBUSY;
+ if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
+ goto out;
+ if (queue->backlog == &queue->list)
+ queue->backlog = &request->list;
+ }
+
+ queue->qlen++;
+ list_add_tail(&request->list, &queue->list);
+
+out:
+ return err;
+}
+EXPORT_SYMBOL_GPL(crypto_enqueue_request);
+
+void *__crypto_dequeue_request(struct crypto_queue *queue, unsigned int offset)
+{
+ struct list_head *request;
+
+ if (unlikely(!queue->qlen))
+ return NULL;
+
+ queue->qlen--;
+
+ if (queue->backlog != &queue->list)
+ queue->backlog = queue->backlog->next;
+
+ request = queue->list.next;
+ list_del(request);
+
+ return (char *)list_entry(request, struct crypto_async_request, list) -
+ offset;
+}
+EXPORT_SYMBOL_GPL(__crypto_dequeue_request);
+
+struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue)
+{
+ return __crypto_dequeue_request(queue, 0);
+}
+EXPORT_SYMBOL_GPL(crypto_dequeue_request);
+
+int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm)
+{
+ struct crypto_async_request *req;
+
+ list_for_each_entry(req, &queue->list, list) {
+ if (req->tfm == tfm)
+ return 1;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_tfm_in_queue);
+
+static inline void crypto_inc_byte(u8 *a, unsigned int size)
+{
+ u8 *b = (a + size);
+ u8 c;
+
+ for (; size; size--) {
+ c = *--b + 1;
+ *b = c;
+ if (c)
+ break;
+ }
+}
+
+void crypto_inc(u8 *a, unsigned int size)
+{
+ __be32 *b = (__be32 *)(a + size);
+ u32 c;
+
+ for (; size >= 4; size -= 4) {
+ c = be32_to_cpu(*--b) + 1;
+ *b = cpu_to_be32(c);
+ if (c)
+ return;
+ }
+
+ crypto_inc_byte(a, size);
+}
+EXPORT_SYMBOL_GPL(crypto_inc);
+
+static inline void crypto_xor_byte(u8 *a, const u8 *b, unsigned int size)
+{
+ for (; size; size--)
+ *a++ ^= *b++;
+}
+
+void crypto_xor(u8 *dst, const u8 *src, unsigned int size)
+{
+ u32 *a = (u32 *)dst;
+ u32 *b = (u32 *)src;
+
+ for (; size >= 4; size -= 4)
+ *a++ ^= *b++;
+
+ crypto_xor_byte((u8 *)a, (u8 *)b, size);
+}
+EXPORT_SYMBOL_GPL(crypto_xor);
+
static int __init crypto_algapi_init(void)
{
crypto_init_proc();
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff