rsa: check that pointer checksum isn't NULL before using it

[platform/kernel/u-boot.git] / lib / rsa / rsa-verify.c

diff --git a/lib/rsa/rsa-verify.c b/lib/rsa/rsa-verify.c
index 9734f6d..287fcc4 100644 (file)
--- 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);