}
EXPORT_SYMBOL_GPL(crypto_mod_put);
-struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask)
+static inline int crypto_is_test_larval(struct crypto_larval *larval)
+{
+ return larval->alg.cra_driver_name[0];
+}
+
+static struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type,
+ u32 mask)
{
struct crypto_alg *q, *alg = NULL;
int best = -2;
continue;
if (crypto_is_larval(q) &&
+ !crypto_is_test_larval((struct crypto_larval *)q) &&
((struct crypto_larval *)q)->mask != mask)
continue;
return alg;
}
-EXPORT_SYMBOL_GPL(__crypto_alg_lookup);
static void crypto_larval_destroy(struct crypto_alg *alg)
{
kfree(larval);
}
-static struct crypto_alg *crypto_larval_alloc(const char *name, u32 type,
- u32 mask)
+struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask)
{
- struct crypto_alg *alg;
struct crypto_larval *larval;
larval = kzalloc(sizeof(*larval), GFP_KERNEL);
larval->alg.cra_priority = -1;
larval->alg.cra_destroy = crypto_larval_destroy;
- atomic_set(&larval->alg.cra_refcnt, 2);
strlcpy(larval->alg.cra_name, name, CRYPTO_MAX_ALG_NAME);
init_completion(&larval->completion);
+ return larval;
+}
+EXPORT_SYMBOL_GPL(crypto_larval_alloc);
+
+static struct crypto_alg *crypto_larval_add(const char *name, u32 type,
+ u32 mask)
+{
+ struct crypto_alg *alg;
+ struct crypto_larval *larval;
+
+ larval = crypto_larval_alloc(name, type, mask);
+ if (IS_ERR(larval))
+ return ERR_CAST(larval);
+
+ atomic_set(&larval->alg.cra_refcnt, 2);
+
down_write(&crypto_alg_sem);
alg = __crypto_alg_lookup(name, type, mask);
if (!alg) {
static struct crypto_alg *crypto_larval_wait(struct crypto_alg *alg)
{
struct crypto_larval *larval = (void *)alg;
+ long timeout;
+
+ timeout = wait_for_completion_interruptible_timeout(
+ &larval->completion, 60 * HZ);
- wait_for_completion_interruptible_timeout(&larval->completion, 60 * HZ);
alg = larval->adult;
- if (alg) {
- if (!crypto_mod_get(alg))
- alg = ERR_PTR(-EAGAIN);
- } else
+ if (timeout < 0)
+ alg = ERR_PTR(-EINTR);
+ else if (!timeout)
+ alg = ERR_PTR(-ETIMEDOUT);
+ else if (!alg)
alg = ERR_PTR(-ENOENT);
+ else if (crypto_is_test_larval(larval) &&
+ !(alg->cra_flags & CRYPTO_ALG_TESTED))
+ alg = ERR_PTR(-EAGAIN);
+ else if (!crypto_mod_get(alg))
+ alg = ERR_PTR(-EAGAIN);
crypto_mod_put(&larval->alg);
return alg;
}
-static struct crypto_alg *crypto_alg_lookup(const char *name, u32 type,
- u32 mask)
+struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask)
{
struct crypto_alg *alg;
return alg;
}
+EXPORT_SYMBOL_GPL(crypto_alg_lookup);
struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask)
{
if (alg)
return crypto_is_larval(alg) ? crypto_larval_wait(alg) : alg;
- return crypto_larval_alloc(name, type, mask);
+ return crypto_larval_add(name, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_larval_lookup);
+int crypto_probing_notify(unsigned long val, void *v)
+{
+ int ok;
+
+ ok = blocking_notifier_call_chain(&crypto_chain, val, v);
+ if (ok == NOTIFY_DONE) {
+ request_module("cryptomgr");
+ ok = blocking_notifier_call_chain(&crypto_chain, val, v);
+ }
+
+ return ok;
+}
+EXPORT_SYMBOL_GPL(crypto_probing_notify);
+
struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask)
{
struct crypto_alg *alg;
struct crypto_alg *larval;
int ok;
+ if (!(mask & CRYPTO_ALG_TESTED)) {
+ type |= CRYPTO_ALG_TESTED;
+ mask |= CRYPTO_ALG_TESTED;
+ }
+
larval = crypto_larval_lookup(name, type, mask);
if (IS_ERR(larval) || !crypto_is_larval(larval))
return larval;
- ok = crypto_notify(CRYPTO_MSG_ALG_REQUEST, larval);
- if (ok == NOTIFY_DONE) {
- request_module("cryptomgr");
- ok = crypto_notify(CRYPTO_MSG_ALG_REQUEST, larval);
- }
+ ok = crypto_probing_notify(CRYPTO_MSG_ALG_REQUEST, larval);
if (ok == NOTIFY_STOP)
alg = crypto_larval_wait(larval);
return crypto_init_cipher_ops(tfm);
case CRYPTO_ALG_TYPE_DIGEST:
- return crypto_init_digest_ops(tfm);
-
+ if ((mask & CRYPTO_ALG_TYPE_HASH_MASK) !=
+ CRYPTO_ALG_TYPE_HASH_MASK)
+ return crypto_init_digest_ops_async(tfm);
+ else
+ return crypto_init_digest_ops(tfm);
+
case CRYPTO_ALG_TYPE_COMPRESS:
return crypto_init_compress_ops(tfm);
const struct crypto_type *type = tfm->__crt_alg->cra_type;
if (type) {
- if (type->exit)
- type->exit(tfm);
+ if (tfm->exit)
+ tfm->exit(tfm);
return;
}
if (err)
goto out_free_tfm;
- if (alg->cra_init && (err = alg->cra_init(tfm))) {
- if (err == -EAGAIN)
- crypto_shoot_alg(alg);
+ if (!tfm->exit && alg->cra_init && (err = alg->cra_init(tfm)))
goto cra_init_failed;
- }
goto out;
cra_init_failed:
crypto_exit_ops(tfm);
out_free_tfm:
+ if (err == -EAGAIN)
+ crypto_shoot_alg(alg);
kfree(tfm);
out_err:
tfm = ERR_PTR(err);
* @type: Type of algorithm
* @mask: Mask for type comparison
*
+ * This function should not be used by new algorithm types.
+ * Plesae use crypto_alloc_tfm instead.
+ *
* crypto_alloc_base() will first attempt to locate an already loaded
* algorithm. If that fails and the kernel supports dynamically loadable
* modules, it will then attempt to load a module of the same name or
return ERR_PTR(err);
}
EXPORT_SYMBOL_GPL(crypto_alloc_base);
+
+struct crypto_tfm *crypto_create_tfm(struct crypto_alg *alg,
+ const struct crypto_type *frontend)
+{
+ char *mem;
+ struct crypto_tfm *tfm = NULL;
+ unsigned int tfmsize;
+ unsigned int total;
+ int err = -ENOMEM;
+
+ tfmsize = frontend->tfmsize;
+ total = tfmsize + sizeof(*tfm) + frontend->extsize(alg, frontend);
+
+ mem = kzalloc(total, GFP_KERNEL);
+ if (mem == NULL)
+ goto out_err;
+
+ tfm = (struct crypto_tfm *)(mem + tfmsize);
+ tfm->__crt_alg = alg;
+
+ err = frontend->init_tfm(tfm, frontend);
+ if (err)
+ goto out_free_tfm;
+
+ if (!tfm->exit && alg->cra_init && (err = alg->cra_init(tfm)))
+ goto cra_init_failed;
+
+ goto out;
+
+cra_init_failed:
+ crypto_exit_ops(tfm);
+out_free_tfm:
+ if (err == -EAGAIN)
+ crypto_shoot_alg(alg);
+ kfree(mem);
+out_err:
+ tfm = ERR_PTR(err);
+out:
+ return tfm;
+}
+EXPORT_SYMBOL_GPL(crypto_create_tfm);
+
+/*
+ * crypto_alloc_tfm - Locate algorithm and allocate transform
+ * @alg_name: Name of algorithm
+ * @frontend: Frontend algorithm type
+ * @type: Type of algorithm
+ * @mask: Mask for type comparison
+ *
+ * crypto_alloc_tfm() will first attempt to locate an already loaded
+ * algorithm. If that fails and the kernel supports dynamically loadable
+ * modules, it will then attempt to load a module of the same name or
+ * alias. If that fails it will send a query to any loaded crypto manager
+ * to construct an algorithm on the fly. A refcount is grabbed on the
+ * algorithm which is then associated with the new transform.
+ *
+ * The returned transform is of a non-determinate type. Most people
+ * should use one of the more specific allocation functions such as
+ * crypto_alloc_blkcipher.
+ *
+ * In case of error the return value is an error pointer.
+ */
+struct crypto_tfm *crypto_alloc_tfm(const char *alg_name,
+ const struct crypto_type *frontend,
+ u32 type, u32 mask)
+{
+ struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask);
+ struct crypto_tfm *tfm;
+ int err;
+
+ type &= frontend->maskclear;
+ mask &= frontend->maskclear;
+ type |= frontend->type;
+ mask |= frontend->maskset;
+
+ lookup = frontend->lookup ?: crypto_alg_mod_lookup;
+
+ for (;;) {
+ struct crypto_alg *alg;
+
+ alg = lookup(alg_name, type, mask);
+ if (IS_ERR(alg)) {
+ err = PTR_ERR(alg);
+ goto err;
+ }
+
+ tfm = crypto_create_tfm(alg, frontend);
+ if (!IS_ERR(tfm))
+ return tfm;
+
+ crypto_mod_put(alg);
+ err = PTR_ERR(tfm);
+
+err:
+ if (err != -EAGAIN)
+ break;
+ if (signal_pending(current)) {
+ err = -EINTR;
+ break;
+ }
+ }
+
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(crypto_alloc_tfm);
/*
* crypto_free_tfm - Free crypto transform
alg = tfm->__crt_alg;
size = sizeof(*tfm) + alg->cra_ctxsize;
- if (alg->cra_exit)
+ if (!tfm->exit && alg->cra_exit)
alg->cra_exit(tfm);
crypto_exit_ops(tfm);
crypto_mod_put(alg);