From 590f3e1ca04c54ddc1604cf1f6b453e17df03cbd Mon Sep 17 00:00:00 2001
From: Jacob Barthelmeh <jacob@wolfssl.com>
Date: Thu, 6 Aug 2015 08:50:16 -0700
Subject: [PATCH] Merge pull request #113 from lfcrypto/wolfssl

add check of ret value
---
 wolfcrypt/src/ed25519.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/wolfcrypt/src/ed25519.c b/wolfcrypt/src/ed25519.c
index 7ddfc3af2..e3d6d06db 100644
--- a/wolfcrypt/src/ed25519.c
+++ b/wolfcrypt/src/ed25519.c
@@ -112,6 +112,8 @@ int wc_ed25519_sign_msg(const byte* in, word32 inlen, byte* out,
     /* step 1: create nonce to use where nonce is r in
        r = H(h_b, ... ,h_2b-1,M) */
     ret = wc_Sha512Hash(key->k, ED25519_KEY_SIZE, az);
+    if (ret != 0)
+        return ret;
 
     /* apply clamp */
     az[0]  &= 248;
@@ -130,7 +132,7 @@ int wc_ed25519_sign_msg(const byte* in, word32 inlen, byte* out,
     ret = wc_Sha512Final(&sha, nonce);
     if (ret != 0)
         return ret;
-    
+
     sc_reduce(nonce);
 
     /* step 2: computing R = rB where rB is the scalar multiplication of