}
EXPORT_SYMBOL_GPL(crypto_alg_mod_lookup);
-static int crypto_init_flags(struct crypto_tfm *tfm, u32 flags)
+static int crypto_init_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
{
- tfm->crt_flags = flags & CRYPTO_TFM_REQ_MASK;
- flags &= ~CRYPTO_TFM_REQ_MASK;
-
- switch (crypto_tfm_alg_type(tfm)) {
- case CRYPTO_ALG_TYPE_CIPHER:
- return crypto_init_cipher_flags(tfm, flags);
-
- case CRYPTO_ALG_TYPE_DIGEST:
- return crypto_init_digest_flags(tfm, flags);
-
- case CRYPTO_ALG_TYPE_COMPRESS:
- return crypto_init_compress_flags(tfm, flags);
-
- default:
- break;
- }
-
- BUG();
- return -EINVAL;
-}
+ const struct crypto_type *type_obj = tfm->__crt_alg->cra_type;
+
+ if (type_obj)
+ return type_obj->init(tfm, type, mask);
-static int crypto_init_ops(struct crypto_tfm *tfm)
-{
switch (crypto_tfm_alg_type(tfm)) {
case CRYPTO_ALG_TYPE_CIPHER:
return crypto_init_cipher_ops(tfm);
static void crypto_exit_ops(struct crypto_tfm *tfm)
{
+ const struct crypto_type *type = tfm->__crt_alg->cra_type;
+
+ if (type) {
+ if (type->exit)
+ type->exit(tfm);
+ return;
+ }
+
switch (crypto_tfm_alg_type(tfm)) {
case CRYPTO_ALG_TYPE_CIPHER:
crypto_exit_cipher_ops(tfm);
}
}
-static unsigned int crypto_ctxsize(struct crypto_alg *alg, int flags)
+static unsigned int crypto_ctxsize(struct crypto_alg *alg, u32 type, u32 mask)
{
+ const struct crypto_type *type_obj = alg->cra_type;
unsigned int len;
+ len = alg->cra_alignmask & ~(crypto_tfm_ctx_alignment() - 1);
+ if (type_obj)
+ return len + type_obj->ctxsize(alg, type, mask);
+
switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
default:
BUG();
case CRYPTO_ALG_TYPE_CIPHER:
- len = crypto_cipher_ctxsize(alg, flags);
+ len += crypto_cipher_ctxsize(alg);
break;
case CRYPTO_ALG_TYPE_DIGEST:
- len = crypto_digest_ctxsize(alg, flags);
+ len += crypto_digest_ctxsize(alg);
break;
case CRYPTO_ALG_TYPE_COMPRESS:
- len = crypto_compress_ctxsize(alg, flags);
+ len += crypto_compress_ctxsize(alg);
break;
}
- return len + (alg->cra_alignmask & ~(crypto_tfm_ctx_alignment() - 1));
+ return len;
}
void crypto_shoot_alg(struct crypto_alg *alg)
}
EXPORT_SYMBOL_GPL(crypto_shoot_alg);
-struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 flags)
+struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
+ u32 mask)
{
struct crypto_tfm *tfm = NULL;
unsigned int tfm_size;
int err = -ENOMEM;
- tfm_size = sizeof(*tfm) + crypto_ctxsize(alg, flags);
+ tfm_size = sizeof(*tfm) + crypto_ctxsize(alg, type, mask);
tfm = kzalloc(tfm_size, GFP_KERNEL);
if (tfm == NULL)
- goto out;
+ goto out_err;
tfm->__crt_alg = alg;
- err = crypto_init_flags(tfm, flags);
- if (err)
- goto out_free_tfm;
-
- err = crypto_init_ops(tfm);
+ err = crypto_init_ops(tfm, type, mask);
if (err)
goto out_free_tfm;
crypto_exit_ops(tfm);
out_free_tfm:
kfree(tfm);
+out_err:
tfm = ERR_PTR(err);
out:
return tfm;
}
EXPORT_SYMBOL_GPL(__crypto_alloc_tfm);
-struct crypto_tfm *crypto_alloc_tfm(const char *name, u32 flags)
+/*
+ * crypto_alloc_base - Locate algorithm and allocate transform
+ * @alg_name: Name of algorithm
+ * @type: Type of algorithm
+ * @mask: Mask for type comparison
+ *
+ * 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
+ * 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_base(const char *alg_name, u32 type, u32 mask)
{
- struct crypto_tfm *tfm = NULL;
+ struct crypto_tfm *tfm;
int err;
- do {
+ for (;;) {
struct crypto_alg *alg;
- alg = crypto_alg_mod_lookup(name, 0, 0);
- err = PTR_ERR(alg);
- if (IS_ERR(alg))
- continue;
+ alg = crypto_alg_mod_lookup(alg_name, type, mask);
+ if (IS_ERR(alg)) {
+ err = PTR_ERR(alg);
+ goto err;
+ }
- tfm = __crypto_alloc_tfm(alg, flags);
- err = 0;
- if (IS_ERR(tfm)) {
- crypto_mod_put(alg);
- err = PTR_ERR(tfm);
- tfm = NULL;
+ tfm = __crypto_alloc_tfm(alg, type, mask);
+ 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;
}
- } while (err == -EAGAIN && !signal_pending(current));
+ }
- return tfm;
+ return ERR_PTR(err);
}
-
+EXPORT_SYMBOL_GPL(crypto_alloc_base);
+
+/*
+ * crypto_free_tfm - Free crypto transform
+ * @tfm: Transform to free
+ *
+ * crypto_free_tfm() frees up the transform and any associated resources,
+ * then drops the refcount on the associated algorithm.
+ */
void crypto_free_tfm(struct crypto_tfm *tfm)
{
struct crypto_alg *alg;
kfree(tfm);
}
-int crypto_alg_available(const char *name, u32 flags)
+EXPORT_SYMBOL_GPL(crypto_free_tfm);
+
+int crypto_has_alg(const char *name, u32 type, u32 mask)
{
int ret = 0;
- struct crypto_alg *alg = crypto_alg_mod_lookup(name, 0, 0);
+ struct crypto_alg *alg = crypto_alg_mod_lookup(name, type, mask);
if (!IS_ERR(alg)) {
crypto_mod_put(alg);
return ret;
}
-
-EXPORT_SYMBOL_GPL(crypto_alloc_tfm);
-EXPORT_SYMBOL_GPL(crypto_free_tfm);
-EXPORT_SYMBOL_GPL(crypto_alg_available);
+EXPORT_SYMBOL_GPL(crypto_has_alg);
projects / linux-drm-fsl-dcu.git / blobdiff