[PATCH spice-gtk v5 4/6] spice-uri: Check if port is in allowed range

[Pavel Grunt <pgrunt@xxxxxxxxxx>]

Use g_ascii_strtoll because it helps to detect overflow.

Related: rhbz#1335239

Acked-by: Victor Toso <victortoso@xxxxxxxxxx>
---
 src/spice-uri.c | 8 ++++++--
 tests/uri.c     | 3 +++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/spice-uri.c b/src/spice-uri.c
index ea25aaa..7eec6e5 100644
--- a/src/spice-uri.c
+++ b/src/spice-uri.c
@@ -170,8 +170,8 @@ gboolean spice_uri_parse(SpiceURI *self, const gchar *_uri, GError **error)
         uri_port = uriv[1];
 
     if (uri_port != NULL) {
-        char *endptr;
-        guint port = strtoul(uri_port, &endptr, 10);
+        gchar *endptr;
+        gint64 port = g_ascii_strtoll(uri_port, &endptr, 10);
         if (*endptr != '\0') {
             g_set_error(error, SPICE_CLIENT_ERROR, SPICE_CLIENT_ERROR_FAILED,
                         "Invalid uri port: %s", uri_port);
@@ -180,6 +180,10 @@ gboolean spice_uri_parse(SpiceURI *self, const gchar *_uri, GError **error)
             g_set_error(error, SPICE_CLIENT_ERROR, SPICE_CLIENT_ERROR_FAILED, "Missing uri port");
             goto end;
         }
+        if (port <= 0 || port > 65535) {
+            g_set_error(error, SPICE_CLIENT_ERROR, SPICE_CLIENT_ERROR_FAILED, "Port out of range");
+            goto end;
+        }
         spice_uri_set_port(self, port);
     }
 
diff --git a/tests/uri.c b/tests/uri.c
index ee3d061..34569ec 100644
--- a/tests/uri.c
+++ b/tests/uri.c
@@ -76,6 +76,9 @@ static void test_spice_uri_ipv4_bad(void)
         {"http://127.0.0.1:port";, "http", "127.0.0.1", 3128, NULL, NULL,
           "Invalid uri port: port"},
         {"http://127.0.0.1:";, "http", "127.0.0.1", 3128, NULL, NULL, "Missing uri port"},
+        {"http://127.0.0.1:-80";, "http", "127.0.0.1", 3128, NULL, NULL, "Port out of range"},
+        {"http://127.0.0.1:4294967396";, "http", "127.0.0.1", 3128, NULL, NULL, "Port out of range"},
+        {"http://127.0.0.1:12345678901234";, "http", "127.0.0.1", 3128, NULL, NULL, "Port out of range"},
     };
 
     test_spice_uri_bad(invalid_test_cases, G_N_ELEMENTS(invalid_test_cases));
-- 
2.8.3

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