[U-Boot] [PATCH] rsa: check that pointer checksum isn't NULL before using it

[Philippe Reynes]

The pointer checksum were used before checking that it
isn't NULL. We move the code that use it after the check.

Reported-by: Coverity (CID: 185835)
Signed-off-by: Philippe Reynes <philippe.reynes at softathome.com>
---
 lib/rsa/rsa-verify.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/rsa/rsa-verify.c b/lib/rsa/rsa-verify.c
index 9734f6d..287fcc4 100644
--- a/lib/rsa/rsa-verify.c
+++ b/lib/rsa/rsa-verify.c
@@ -295,7 +295,7 @@ static int rsa_verify_key(struct image_sign_info *info,
 #endif
 	struct checksum_algo *checksum = info->checksum;
 	struct padding_algo *padding = info->padding;
-	int hash_len = checksum->checksum_len;
+	int hash_len;
 
 	if (!prop || !sig || !hash || !checksum)
 		return -EIO;
@@ -315,6 +315,7 @@ static int rsa_verify_key(struct image_sign_info *info,
 	}
 
 	uint8_t buf[sig_len];
+	hash_len = checksum->checksum_len;
 
 #if !defined(USE_HOSTCC)
 	ret = uclass_get_device(UCLASS_MOD_EXP, 0, &mod_exp_dev);
-- 
2.7.4