lib: rsa: Add debug message on algo mismatch

Currently we fail silently if there is an algorithm mismatch. To help
distinguish this failure condition.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>

diff --git a/lib/rsa/rsa-verify.c b/lib/rsa/rsa-verify.c
index e34d329..aee76f4 100644 (file)
--- a/lib/rsa/rsa-verify.c
+++ b/lib/rsa/rsa-verify.c
@@ -447,8 +447,11 @@ static int rsa_verify_with_keynode(struct image_sign_info *info,
        }
 
        algo = fdt_getprop(blob, node, "algo", NULL);
-       if (strcmp(info->name, algo))
+       if (strcmp(info->name, algo)) {
+               debug("%s: Wrong algo: have %s, expected %s", __func__,
+                     info->name, algo);
                return -EFAULT;
+       }
 
        prop.num_bits = fdtdec_get_int(blob, node, "rsa,num-bits", 0);