From 82e9b78a388ab539c8784cd853adf6e4a97d52c5 Mon Sep 17 00:00:00 2001
From: Kamil Dudka <kdudka@redhat.com>
Date: Sat, 24 Apr 2010 23:21:13 +0200
Subject: [PATCH] nss: fix SSL handshake timeout underflow

 lib/nss.c |   10 +++++++++-
 2 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/CHANGES b/CHANGES
index 99f04a5..7433364 100644
--- a/CHANGES
+++ b/CHANGES
@@ -10,6 +10,9 @@ Kamil Dudka (24 Apr 2010)
 - Fixed test536 in order to not fail with threaded DNS resolver and tweaked
   comments in certain examples using curl_multi_fdset().
 
+- Fixed SSL handshake timeout underflow in libcurl-NSS, which caused test405
+  to hang on a slow machine.
+
 Version 7.20.1 (14 April 2010)
 
 Daniel Stenberg (9 Apr 2010)
diff --git a/lib/nss.c b/lib/nss.c
index 0f8ebd5..addb94b 100644
--- a/lib/nss.c
+++ b/lib/nss.c
@@ -1025,6 +1025,7 @@ CURLcode Curl_nss_connect(struct connectdata *conn, int sockindex)
   int curlerr;
   const int *cipher_to_enable;
   PRSocketOptionData sock_opt;
+  long time_left;
   PRUint32 timeout;
 
   curlerr = CURLE_SSL_CONNECT_ERROR;
@@ -1302,8 +1303,15 @@ CURLcode Curl_nss_connect(struct connectdata *conn, int sockindex)
 
   SSL_SetURL(connssl->handle, conn->host.name);
 
+  /* check timeout situation */
+  time_left = Curl_timeleft(conn, NULL, TRUE);
+  if(time_left < 0L) {
+    failf(data, "timed out before SSL handshake");
+    goto error;
+  }
+  timeout = PR_MillisecondsToInterval((PRUint32) time_left);
+
   /* Force the handshake now */
-  timeout = PR_MillisecondsToInterval((PRUint32)Curl_timeleft(conn, NULL, TRUE));
   if(SSL_ForceHandshakeWithTimeout(connssl->handle, timeout) != SECSuccess) {
     if(conn->data->set.ssl.certverifyresult == SSL_ERROR_BAD_CERT_DOMAIN)
       curlerr = CURLE_PEER_FAILED_VERIFICATION;