eddsa: zero orig_k after sign

Author: JeremiahM37

wolfcrypt/src/ed25519.c

@@ -548,6 +548,7 @@ int wc_ed25519_sign_msg_ex(const byte* in, word32 inLen, byte* out,
         }
         ret = ctMaskGT(c, 0) & SIG_VERIFY_E;
     }
+    ForceZero(orig_k, sizeof(orig_k));
 #endif
 
     return ret;

wolfcrypt/src/ed448.c

@@ -505,6 +505,7 @@ int wc_ed448_sign_msg_ex(const byte* in, word32 inLen, byte* out,
         }
         ret = ctMaskGT(c, 0) & SIG_VERIFY_E;
     }
+    ForceZero(orig_k, sizeof(orig_k));
 #endif
 
     ForceZero(az, sizeof(az));