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-rw-r--r--crypto/skcipher.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/crypto/skcipher.c b/crypto/skcipher.c
index 0bd8c6caa498..4caab81d2d02 100644
--- a/crypto/skcipher.c
+++ b/crypto/skcipher.c
@@ -949,6 +949,30 @@ struct crypto_skcipher *crypto_alloc_skcipher(const char *alg_name,
}
EXPORT_SYMBOL_GPL(crypto_alloc_skcipher);
+struct crypto_sync_skcipher *crypto_alloc_sync_skcipher(
+ const char *alg_name, u32 type, u32 mask)
+{
+ struct crypto_skcipher *tfm;
+
+ /* Only sync algorithms allowed. */
+ mask |= CRYPTO_ALG_ASYNC;
+
+ tfm = crypto_alloc_tfm(alg_name, &crypto_skcipher_type2, type, mask);
+
+ /*
+ * Make sure we do not allocate something that might get used with
+ * an on-stack request: check the request size.
+ */
+ if (!IS_ERR(tfm) && WARN_ON(crypto_skcipher_reqsize(tfm) >
+ MAX_SYNC_SKCIPHER_REQSIZE)) {
+ crypto_free_skcipher(tfm);
+ return ERR_PTR(-EINVAL);
+ }
+
+ return (struct crypto_sync_skcipher *)tfm;
+}
+EXPORT_SYMBOL_GPL(crypto_alloc_sync_skcipher);
+
int crypto_has_skcipher2(const char *alg_name, u32 type, u32 mask)
{
return crypto_type_has_alg(alg_name, &crypto_skcipher_type2,