Fill the TLS padding extension with zero bytes instead of spaces.

R=agl@chromium.org
BUG=315828
TEST=none

Review URL: https://codereview.chromium.org/99253006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238460 0039d316-1c4b-4281-b951-d872f2087c98

net/third_party/nss/patches/paddingextension.patch

@@ -100,7 +100,7 @@ index 0415770..cdebcc9 100644
 +	return -1;
 +    if (SECSuccess != ssl3_AppendHandshakeNumber(ss, paddingLen, 2))
 +	return -1;
-+    memset(padding, ' ', paddingLen);
++    memset(padding, 0, paddingLen);
 +    if (SECSuccess != ssl3_AppendHandshake(ss, padding, paddingLen))
 +	return -1;
 +

net/third_party/nss/ssl/ssl3ext.c

@@ -2367,7 +2367,7 @@ ssl3_AppendPaddingExtension(sslSocket *ss, unsigned int extensionLen,
 	return -1;
     if (SECSuccess != ssl3_AppendHandshakeNumber(ss, paddingLen, 2))
 	return -1;
-    memset(padding, ' ', paddingLen);
+    memset(padding, 0, paddingLen);
     if (SECSuccess != ssl3_AppendHandshake(ss, padding, paddingLen))
 	return -1;