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Merge pull request #13 from ZoiteChat/fix-sni-extension-handling

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Fix SNI extension handling
This commit is contained in:
deepend-tildeclub
2026-01-16 15:59:12 -07:00
committed by GitHub
parent 90b227ed59 af12c6557a
commit 3fdd639028
1 changed files with 44 additions and 1 deletions
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45
src/common/server.c
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@@ -64,6 +64,40 @@
#ifdef USE_OPENSSL
/* local variables */
static struct session *g_sess = NULL;
static gboolean
ssl_sni_hostname_is_valid (const char *hostname)
{
const unsigned char *current;
char *ip_literal = NULL;
size_t hostname_len;
if (!hostname || !hostname[0])
return FALSE;
for (current = (const unsigned char *)hostname; *current; current++)
{
if (*current > 0x7f)
return FALSE;
}
if (g_hostname_is_ip_address (hostname))
return FALSE;
hostname_len = strlen (hostname);
if (hostname[0] == '[' && hostname_len > 2 && hostname[hostname_len - 1] == ']')
{
ip_literal = g_strndup (hostname + 1, hostname_len - 2);
if (g_hostname_is_ip_address (ip_literal))
{
g_free (ip_literal);
return FALSE;
}
g_free (ip_literal);
}
return TRUE;
}
#endif
static GSList *away_list = NULL;
@@ -519,7 +553,16 @@ ssl_do_connect (server * serv)
g_sess = serv->server_session;
/* Set SNI hostname before connect */
SSL_set_tlsext_host_name(serv->ssl, serv->hostname);
if (ssl_sni_hostname_is_valid (serv->hostname))
{
SSL_set_tlsext_host_name (serv->ssl, serv->hostname);
}
else
{
g_snprintf (buf, sizeof (buf), "* Skipping invalid SNI hostname: %s",
serv->hostname);
EMIT_SIGNAL (XP_TE_SSLMESSAGE, serv->server_session, buf, NULL, NULL, NULL, 0);
}
if (SSL_connect (serv->ssl) <= 0)
{