commit ac71c0952940a0f0a751b860c5a0544eb994b98f
author Adam Langley <agl@chromium.org> Thu Jul 24 16:06:47 2014 -0700
committer Adam Langley <agl@chromium.org> Mon Jul 28 17:05:12 2014 -0700
tree 500f997e123a57ff8b9cbc865f7b5ef09476ee9e
parent 25ba90e34ace0023b678b0b8df30691037402a24

Make sure BN_sqr can never return a negative value.

PR#3410

(Imported from upstream's b7a4f98b152e5b9a56da1501e73053d83a9799b6)

Change-Id: I382c12f205d9adbd418574f7938a1d55a07128e4

crypto/bn/mul.c

diff --git a/crypto/bn/mul.c b/crypto/bn/mul.c
index 8c74e2f..54b2083 100644
--- a/crypto/bn/mul.c
+++ b/crypto/bn/mul.c
@@ -821,6 +821,7 @@
   al = a->top;
   if (al <= 0) {
     r->top = 0;
+    r->neg = 0;
     return 1;
   }