From 852703df61eaf1038b017a0e04d937f7d7444b01 Mon Sep 17 00:00:00 2001
From: Denton Gentry <dgentry@google.com>
Date: Sat, 26 Sep 2015 08:03:19 -0700
Subject: [PATCH] Add SNI support in OpenSSL mode.

PolarSSL would need to add a call to
ssl_set_hostname(ssl, hostname_to_verify)
but I don't have a way to test that it even compiles.
---
 src/tlsdate-helper.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/tlsdate-helper.c b/src/tlsdate-helper.c
index 877c67e..bda5a70 100644
--- a/src/tlsdate-helper.c
+++ b/src/tlsdate-helper.c
@@ -1124,6 +1124,7 @@ run_ssl (uint32_t *time_map, int time_is_an_illusion, int http)
   SSL *ssl;
   struct stat statbuf;
   uint32_t result_time;
+  int do_sni = 0;
 
   SSL_load_error_strings();
   SSL_library_init();
@@ -1141,6 +1142,7 @@ run_ssl (uint32_t *time_map, int time_is_an_illusion, int http)
   {
     verb ("V: using TLSv1_client_method()");
     ctx = SSL_CTX_new(TLSv1_client_method());
+    do_sni = 1;
   } else
     die("Unsupported protocol `%s'", protocol);
 
@@ -1186,6 +1188,12 @@ run_ssl (uint32_t *time_map, int time_is_an_illusion, int http)
     SSL_set_info_callback(ssl, openssl_time_callback);
   }
 
+  if (do_sni)
+  {
+    if (1 != SSL_set_tlsext_host_name(ssl, host))
+      die ("Failed to set SNI host name `%s`", host);
+  }
+
   SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY);
   verb("V: opening socket to %s:%s", host, port);
   if ( (1 != BIO_set_conn_hostname(s_bio, host)) ||
-- 
2.6.0.rc2.230.g3dd15c0