crypto: skcipher - Add crypto_skcipher_has_setkey

This patch adds a way for skcipher users to determine whether a key
is required by a transform.

Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 2 insertions, 0 deletions

diff --git a/crypto/skcipher.c b/crypto/skcipher.c
index 7591928be7ca..d199c0b1751c 100644
--- a/crypto/skcipher.c
+++ b/crypto/skcipher.c
@@ -118,6 +118,7 @@ static int crypto_init_skcipher_ops_blkcipher(struct crypto_tfm *tfm)
 	skcipher->decrypt = skcipher_decrypt_blkcipher;
 
 	skcipher->ivsize = crypto_blkcipher_ivsize(blkcipher);
+	skcipher->has_setkey = calg->cra_blkcipher.max_keysize;
 
 	return 0;
 }
@@ -210,6 +211,7 @@ static int crypto_init_skcipher_ops_ablkcipher(struct crypto_tfm *tfm)
 	skcipher->ivsize = crypto_ablkcipher_ivsize(ablkcipher);
 	skcipher->reqsize = crypto_ablkcipher_reqsize(ablkcipher) +
 			    sizeof(struct ablkcipher_request);
+	skcipher->has_setkey = calg->cra_ablkcipher.max_keysize;
 
 	return 0;
 }