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mpdparser: validate representation set identifier
It must have no whitespace, and must comply with RFC 1738 when used to build a URL. https://bugzilla.gnome.org/show_bug.cgi?id=750852
This commit is contained in:
Vincent Penquerc'h
parent
704d49b9c7
commit
b8df6cc316
2 changed files with 105 additions and 5 deletions
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@ -33,6 +33,9 @@
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#define GST_CAT_DEFAULT gst_dash_demux_debug
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/* Property parsing */
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static gboolean gst_mpdparser_get_xml_prop_validated_string (xmlNode * a_node,
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const gchar * property_name, gchar ** property_value,
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gboolean (*validator) (const char *));
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static gboolean gst_mpdparser_get_xml_prop_string (xmlNode * a_node,
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const gchar * property_name, gchar ** property_value);
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static gboolean gst_mpdparser_get_xml_ns_prop_string (xmlNode * a_node,
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@ -253,14 +256,20 @@ static const struct GstMpdParserUtcTimingMethod
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/* functions to parse node namespaces, content and properties */
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static gboolean
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gst_mpdparser_get_xml_prop_string (xmlNode * a_node,
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const gchar * property_name, gchar ** property_value)
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gst_mpdparser_get_xml_prop_validated_string (xmlNode * a_node,
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const gchar * property_name, gchar ** property_value,
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gboolean (*validate) (const char *))
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{
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xmlChar *prop_string;
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gboolean exists = FALSE;
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prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
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if (prop_string) {
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if (validate && !(*validate) ((const char *) prop_string)) {
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GST_WARNING ("Validation failure: %s", prop_string);
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xmlFree (prop_string);
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return FALSE;
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}
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*property_value = (gchar *) prop_string;
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exists = TRUE;
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GST_LOG (" - %s: %s", property_name, prop_string);
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@ -288,6 +297,28 @@ gst_mpdparser_get_xml_ns_prop_string (xmlNode * a_node,
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return exists;
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}
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static gboolean
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gst_mpdparser_get_xml_prop_string (xmlNode * a_node,
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const gchar * property_name, gchar ** property_value)
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{
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return gst_mpdparser_get_xml_prop_validated_string (a_node, property_name,
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property_value, NULL);
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}
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static gboolean
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gst_mpdparser_validate_no_whitespace (const char *s)
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{
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return !strpbrk (s, "\r\n\t ");
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}
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static gboolean
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gst_mpdparser_get_xml_prop_string_no_whitespace (xmlNode * a_node,
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const gchar * property_name, gchar ** property_value)
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{
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return gst_mpdparser_get_xml_prop_validated_string (a_node, property_name,
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property_value, gst_mpdparser_validate_no_whitespace);
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}
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static gboolean
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gst_mpdparser_get_xml_prop_string_vector_type (xmlNode * a_node,
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const gchar * property_name, gchar *** property_value)
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@ -1571,7 +1602,8 @@ gst_mpdparser_parse_representation_node (GList ** list, xmlNode * a_node,
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*list = g_list_append (*list, new_representation);
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GST_LOG ("attributes of Representation node:");
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gst_mpdparser_get_xml_prop_string (a_node, "id", &new_representation->id);
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gst_mpdparser_get_xml_prop_string_no_whitespace (a_node, "id",
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&new_representation->id);
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gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "bandwidth", 0,
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&new_representation->bandwidth);
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gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "qualityRanking", 0,
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@ -2868,6 +2900,26 @@ promote_format_to_uint64 (const gchar * format)
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return promoted_format;
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}
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static gboolean
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gst_mpdparser_validate_rfc1738_url (const char *s)
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{
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while (*s) {
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if (!strchr
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(";:@&=aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ0123456789$-_.+!*'(),%",
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*s))
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return FALSE;
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if (*s == '%') {
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/* g_ascii_isdigit returns FALSE for NUL, and || is a short circuiting
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operator, so this is safe for strings ending before two hex digits */
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if (!g_ascii_isxdigit (s[1]) || !g_ascii_isxdigit (s[2]))
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return FALSE;
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s += 2;
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}
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s++;
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}
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return TRUE;
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}
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static gchar *
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gst_mpdparser_build_URL_from_template (const gchar * url_template,
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const gchar * id, guint number, guint bandwidth, guint64 time)
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@ -2891,6 +2943,11 @@ gst_mpdparser_build_URL_from_template (const gchar * url_template,
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format = default_format;
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if (!g_strcmp0 (token, "RepresentationID")) {
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if (!gst_mpdparser_validate_rfc1738_url (id)) {
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GST_WARNING ("String '%s' has characters invalid in an RFC 1738 URL",
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id);
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goto invalid_format;
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}
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tokens[i] = g_strdup_printf ("%s", id);
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g_free (token);
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last_token_par = TRUE;
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@ -2016,7 +2016,7 @@ GST_START_TEST (dash_mpdparser_period_adaptationSet_representation)
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" profiles=\"urn:mpeg:dash:profile:isoff-main:2011\">"
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" <Period>"
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" <AdaptationSet>"
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" <Representation id=\"Test Id\""
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" <Representation id=\"Test_Id\""
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" bandwidth=\"100\""
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" qualityRanking=\"200\""
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" dependencyId=\"one two three\""
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@ -2033,7 +2033,7 @@ GST_START_TEST (dash_mpdparser_period_adaptationSet_representation)
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adaptationSet = (GstAdaptationSetNode *) periodNode->AdaptationSets->data;
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representation = (GstRepresentationNode *)
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adaptationSet->Representations->data;
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assert_equals_string (representation->id, "Test Id");
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assert_equals_string (representation->id, "Test_Id");
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assert_equals_uint64 (representation->bandwidth, 100);
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assert_equals_uint64 (representation->qualityRanking, 200);
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assert_equals_string (representation->dependencyId[0], "one");
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@ -4447,6 +4447,44 @@ GST_START_TEST
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GST_END_TEST;
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GST_START_TEST (dash_mpdparser_whitespace_strings)
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{
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fail_unless (gst_mpdparser_validate_no_whitespace ("") == TRUE);
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fail_unless (gst_mpdparser_validate_no_whitespace ("/") == TRUE);
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fail_unless (gst_mpdparser_validate_no_whitespace (" ") == FALSE);
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fail_unless (gst_mpdparser_validate_no_whitespace ("aaaaaaaa ") == FALSE);
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fail_unless (gst_mpdparser_validate_no_whitespace ("a\ta") == FALSE);
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fail_unless (gst_mpdparser_validate_no_whitespace ("a\ra") == FALSE);
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fail_unless (gst_mpdparser_validate_no_whitespace ("a\na") == FALSE);
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}
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GST_END_TEST;
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GST_START_TEST (dash_mpdparser_rfc1738_strings)
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{
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fail_unless (gst_mpdparser_validate_rfc1738_url ("/") == FALSE);
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fail_unless (gst_mpdparser_validate_rfc1738_url (" ") == FALSE);
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fail_unless (gst_mpdparser_validate_rfc1738_url ("aaaaaaaa ") == FALSE);
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fail_unless (gst_mpdparser_validate_rfc1738_url ("") == TRUE);
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fail_unless (gst_mpdparser_validate_rfc1738_url ("a") == TRUE);
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fail_unless (gst_mpdparser_validate_rfc1738_url
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(";:@&=aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ0123456789$-_.+!*'(),%AA")
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== TRUE);
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fail_unless (gst_mpdparser_validate_rfc1738_url
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(";:@&=aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ0123456789$-_.+!*'(),% ")
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== FALSE);
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fail_unless (gst_mpdparser_validate_rfc1738_url ("%AA") == TRUE);
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fail_unless (gst_mpdparser_validate_rfc1738_url ("%A") == FALSE);
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fail_unless (gst_mpdparser_validate_rfc1738_url ("%") == FALSE);
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fail_unless (gst_mpdparser_validate_rfc1738_url ("%XA") == FALSE);
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fail_unless (gst_mpdparser_validate_rfc1738_url ("%AX") == FALSE);
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fail_unless (gst_mpdparser_validate_rfc1738_url ("%XX") == FALSE);
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fail_unless (gst_mpdparser_validate_rfc1738_url ("\001") == FALSE);
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}
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GST_END_TEST;
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/*
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* create a test suite containing all dash testcases
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*/
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@ -4457,6 +4495,7 @@ dash_suite (void)
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TCase *tc_simpleMPD = tcase_create ("simpleMPD");
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TCase *tc_complexMPD = tcase_create ("complexMPD");
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TCase *tc_negativeTests = tcase_create ("negativeTests");
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TCase *tc_stringTests = tcase_create ("stringTests");
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GST_DEBUG_CATEGORY_INIT (gst_dash_demux_debug, "gst_dash_demux_debug", 0,
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"mpeg dash tests");
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@ -4605,9 +4644,13 @@ dash_suite (void)
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tcase_add_test (tc_negativeTests,
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dash_mpdparser_wrong_period_duration_inferred_from_next_mediaPresentationDuration);
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tcase_add_test (tc_stringTests, dash_mpdparser_whitespace_strings);
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tcase_add_test (tc_stringTests, dash_mpdparser_rfc1738_strings);
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suite_add_tcase (s, tc_simpleMPD);
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suite_add_tcase (s, tc_complexMPD);
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suite_add_tcase (s, tc_negativeTests);
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suite_add_tcase (s, tc_stringTests);
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return s;
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}
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