Use safer return values in uECC_verify()
This is a first step in protecting against fault injection attacks: the
attacker can no longer change failure into success by flipping a single bit.
Additional steps are needed to prevent other attacks (instruction skip etc)
and will be the object of future commits.
The return value of uECC_vli_equal() should be protected as well, which will
be done in a future commit as well.
diff --git a/include/tinycrypt/ecc_dsa.h b/include/tinycrypt/ecc_dsa.h
index e54a77e..55b9d43 100644
--- a/include/tinycrypt/ecc_dsa.h
+++ b/include/tinycrypt/ecc_dsa.h
@@ -123,8 +123,8 @@
/**
* @brief Verify an ECDSA signature.
- * @return returns TC_SUCCESS (1) if the signature is valid
- * returns TC_FAIL (0) if the signature is invalid.
+ * @return returns UECC_SUCCESS if the signature is valid
+ * returns UECC_FAILURE if the signature is invalid.
*
* @param p_public_key IN -- The signer's public key.
* @param p_message_hash IN -- The hash of the signed data.