From: Gary R Hook <gary.hook@amd.com>
Date: Tue, 25 Jul 2017 19:21:23 +0000 (-0500)
Subject: crypto: ccp - Add a call to xts_check_key()
X-Git-Tag: v4.14-rc1~129^2~25
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=47f27f160be6d26d61d3e75923e635e4e6c099fb;p=platform%2Fkernel%2Flinux-exynos.git

crypto: ccp - Add a call to xts_check_key()

Vet the key using the available standard function

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/ccp/ccp-crypto-aes-xts.c b/drivers/crypto/ccp/ccp-crypto-aes-xts.c
index 3f26a41..2b5d3a6 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