[v3,1/3] crypto: ccp - Add a call to xts_check_key()

Commit Message

Gary R Hook July 25, 2017, 7:21 p.m. UTC

Vet the key using the available standard function

Signed-off-by: Gary R Hook <[e-mail]>
---
 drivers/crypto/ccp/ccp-crypto-aes-xts.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

Patch

diff --git a/drivers/crypto/ccp/ccp-crypto-aes-xts.c b/drivers/crypto/ccp/ccp-crypto-aes-xts.c
index 3f26a415ef44..2b5d3a62fad9 100644
--- a/drivers/crypto/ccp/ccp-crypto-aes-xts.c
+++ b/drivers/crypto/ccp/ccp-crypto-aes-xts.c
@@ -16,6 +16,7 @@ 
 #include <linux/delay.h>
 #include <linux/scatterlist.h>
 #include <crypto/aes.h>
+#include <crypto/xts.h>
 #include <crypto/internal/skcipher.h>
 #include <crypto/scatterwalk.h>
 
@@ -97,7 +98,13 @@  static int ccp_aes_xts_complete(struct crypto_async_request *async_req, int ret)
 static int ccp_aes_xts_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
 			      unsigned int key_len)
 {
-	struct ccp_ctx *ctx = crypto_tfm_ctx(crypto_ablkcipher_tfm(tfm));
+	struct crypto_tfm *xfm = crypto_ablkcipher_tfm(tfm);
+	struct ccp_ctx *ctx = crypto_tfm_ctx(xfm);
+	int ret;
+
+	ret = xts_check_key(xfm, key, key_len);
+	if (ret)
+		return ret;
 
 	/* Only support 128-bit AES key with a 128-bit Tweak key,
 	 * otherwise use the fallback