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qtdemux: PIFF track encryption box support
The PIFF track encryption box is a UUID box containing the default encryption values that should be used for PIFF sample encryption. https://bugzilla.gnome.org/show_bug.cgi?id=796647
This commit is contained in:
Philippe Normand
parent
3573f71c91
commit
babf4210f0
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@ -2739,6 +2739,62 @@ qtdemux_handle_xmp_taglist (GstQTDemux * qtdemux, GstTagList * taglist,
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}
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}
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static void
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qtdemux_update_default_sample_encryption_settings (GstQTDemux * qtdemux,
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QtDemuxCencSampleSetInfo * info, guint32 is_encrypted, guint8 iv_size,
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const guint8 * kid)
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{
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GstBuffer *kid_buf = gst_buffer_new_allocate (NULL, 16, NULL);
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gst_buffer_fill (kid_buf, 0, kid, 16);
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if (info->default_properties)
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gst_structure_free (info->default_properties);
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info->default_properties =
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gst_structure_new ("application/x-cenc",
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"iv_size", G_TYPE_UINT, iv_size,
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"encrypted", G_TYPE_BOOLEAN, (is_encrypted == 1),
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"kid", GST_TYPE_BUFFER, kid_buf, NULL);
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GST_DEBUG_OBJECT (qtdemux, "default sample properties: "
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"is_encrypted=%u, iv_size=%u", is_encrypted, iv_size);
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gst_buffer_unref (kid_buf);
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}
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static gboolean
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qtdemux_update_default_piff_encryption_settings (GstQTDemux * qtdemux,
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QtDemuxCencSampleSetInfo * info, GstByteReader * br)
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{
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guint32 algorithm_id = 0;
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const guint8 *kid;
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gboolean is_encrypted = TRUE;
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guint8 iv_size = 8;
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if (!gst_byte_reader_get_uint24_le (br, &algorithm_id)) {
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GST_ERROR_OBJECT (qtdemux, "Error getting box's algorithm ID field");
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return FALSE;
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}
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algorithm_id >>= 8;
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if (algorithm_id == 0) {
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is_encrypted = FALSE;
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} else if (algorithm_id == 1) {
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GST_DEBUG_OBJECT (qtdemux, "AES 128-bits CTR encrypted stream");
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} else if (algorithm_id == 2) {
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GST_DEBUG_OBJECT (qtdemux, "AES 128-bits CBC encrypted stream");
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}
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if (!gst_byte_reader_get_uint8 (br, &iv_size))
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return FALSE;
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if (!gst_byte_reader_get_data (br, 16, &kid))
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return FALSE;
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qtdemux_update_default_sample_encryption_settings (qtdemux, info,
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is_encrypted, iv_size, kid);
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gst_structure_set (info->default_properties, "piff_algorithm_id",
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G_TYPE_UINT, algorithm_id, NULL);
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return TRUE;
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}
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static void
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qtdemux_parse_piff (GstQTDemux * qtdemux, const guint8 * buffer, gint length,
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guint offset)
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@ -2747,7 +2803,7 @@ qtdemux_parse_piff (GstQTDemux * qtdemux, const guint8 * buffer, gint length,
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guint8 version;
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guint32 flags = 0;
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guint i;
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guint8 iv_size = 8;
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guint iv_size = 8;
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QtDemuxStream *stream;
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GstStructure *structure;
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QtDemuxCencSampleSetInfo *ss_info = NULL;
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@ -2777,13 +2833,13 @@ qtdemux_parse_piff (GstQTDemux * qtdemux, const guint8 * buffer, gint length,
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stream->protection_scheme_info = g_new0 (QtDemuxCencSampleSetInfo, 1);
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ss_info = (QtDemuxCencSampleSetInfo *) stream->protection_scheme_info;
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if (!ss_info->default_properties) {
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ss_info->default_properties =
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gst_structure_new ("application/x-cenc",
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"iv_size", G_TYPE_UINT, iv_size, "encrypted", G_TYPE_BOOLEAN, TRUE,
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NULL);
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if (ss_info->default_properties)
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gst_structure_free (ss_info->default_properties);
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ss_info->default_properties =
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gst_structure_new ("application/x-cenc",
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"iv_size", G_TYPE_UINT, iv_size, "encrypted", G_TYPE_BOOLEAN, TRUE, NULL);
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}
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if (ss_info->crypto_info) {
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GST_LOG_OBJECT (qtdemux, "unreffing existing crypto_info");
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@ -2805,49 +2861,19 @@ qtdemux_parse_piff (GstQTDemux * qtdemux, const guint8 * buffer, gint length,
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}
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if ((flags & 0x000001)) {
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guint32 algorithm_id = 0;
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const guint8 *kid;
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GstBuffer *kid_buf;
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gboolean is_encrypted = TRUE;
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if (!gst_byte_reader_get_uint24_le (&br, &algorithm_id)) {
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GST_ERROR_OBJECT (qtdemux, "Error getting box's algorithm ID field");
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if (!qtdemux_update_default_piff_encryption_settings (qtdemux, ss_info,
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&br))
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return;
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}
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algorithm_id >>= 8;
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if (algorithm_id == 0) {
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is_encrypted = FALSE;
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} else if (algorithm_id == 1) {
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/* FIXME: maybe store this in properties? */
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GST_DEBUG_OBJECT (qtdemux, "AES 128-bits CTR encrypted stream");
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} else if (algorithm_id == 2) {
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/* FIXME: maybe store this in properties? */
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GST_DEBUG_OBJECT (qtdemux, "AES 128-bits CBC encrypted stream");
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}
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if (!gst_byte_reader_get_uint8 (&br, &iv_size))
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return;
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if (!gst_byte_reader_get_data (&br, 16, &kid))
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return;
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kid_buf = gst_buffer_new_allocate (NULL, 16, NULL);
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gst_buffer_fill (kid_buf, 0, kid, 16);
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if (ss_info->default_properties)
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gst_structure_free (ss_info->default_properties);
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ss_info->default_properties =
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gst_structure_new ("application/x-cenc",
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"iv_size", G_TYPE_UINT, iv_size,
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"encrypted", G_TYPE_BOOLEAN, is_encrypted,
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"kid", GST_TYPE_BUFFER, kid_buf, NULL);
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GST_DEBUG_OBJECT (qtdemux, "default sample properties: "
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"is_encrypted=%u, iv_size=%u", is_encrypted, iv_size);
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gst_buffer_unref (kid_buf);
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} else if ((flags & 0x000002)) {
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uses_sub_sample_encryption = TRUE;
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}
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if (!gst_structure_get_uint (ss_info->default_properties, "iv_size",
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&iv_size)) {
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GST_ERROR_OBJECT (qtdemux, "Error getting encryption IV size field");
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return;
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}
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if (!gst_byte_reader_get_uint32_be (&br, &sample_count)) {
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GST_ERROR_OBJECT (qtdemux, "Error getting box's sample count field");
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return;
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@ -2881,6 +2907,7 @@ qtdemux_parse_piff (GstQTDemux * qtdemux, const guint8 * buffer, gint length,
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if (uses_sub_sample_encryption) {
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guint16 n_subsamples;
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const GValue *kid_buf_value;
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if (!gst_byte_reader_get_uint16_be (&br, &n_subsamples)
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|| n_subsamples == 0) {
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@ -2899,9 +2926,14 @@ qtdemux_parse_piff (GstQTDemux * qtdemux, const guint8 * buffer, gint length,
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return;
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}
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buf = gst_buffer_new_wrapped (data, n_subsamples * 6);
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kid_buf_value =
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gst_structure_get_value (ss_info->default_properties, "kid");
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gst_structure_set (properties,
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"subsample_count", G_TYPE_UINT, n_subsamples,
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"subsamples", GST_TYPE_BUFFER, buf, NULL);
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gst_structure_set_value (properties, "kid", kid_buf_value);
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gst_buffer_unref (buf);
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} else {
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gst_structure_set (properties, "subsample_count", G_TYPE_UINT, 0, NULL);
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@ -8158,7 +8190,9 @@ gst_qtdemux_configure_protected_caps (GstQTDemux * qtdemux,
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FALSE);
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if (stream->protection_scheme_type != FOURCC_cenc) {
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GST_ERROR_OBJECT (qtdemux, "unsupported protection scheme");
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GST_ERROR_OBJECT (qtdemux,
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"unsupported protection scheme: %" GST_FOURCC_FORMAT,
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GST_FOURCC_ARGS (stream->protection_scheme_type));
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return FALSE;
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}
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if (qtdemux->protection_system_ids == NULL) {
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@ -9940,6 +9974,9 @@ qtdemux_parse_protection_scheme_info (GstQTDemux * qtdemux,
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GNode *frma;
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GNode *schm;
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GNode *schi;
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QtDemuxCencSampleSetInfo *info;
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GNode *tenc;
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const guint8 *tenc_data;
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g_return_val_if_fail (qtdemux != NULL, FALSE);
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g_return_val_if_fail (stream != NULL, FALSE);
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@ -9986,20 +10023,24 @@ qtdemux_parse_protection_scheme_info (GstQTDemux * qtdemux,
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GST_DEBUG_OBJECT (qtdemux, "sinf box does not contain schi box");
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return FALSE;
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}
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if (stream->protection_scheme_type != FOURCC_cenc &&
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stream->protection_scheme_type != FOURCC_piff) {
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GST_ERROR_OBJECT (qtdemux,
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"Invalid protection_scheme_type: %" GST_FOURCC_FORMAT,
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GST_FOURCC_ARGS (stream->protection_scheme_type));
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return FALSE;
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}
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if (G_UNLIKELY (!stream->protection_scheme_info))
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stream->protection_scheme_info =
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g_malloc0 (sizeof (QtDemuxCencSampleSetInfo));
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info = (QtDemuxCencSampleSetInfo *) stream->protection_scheme_info;
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if (stream->protection_scheme_type == FOURCC_cenc) {
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QtDemuxCencSampleSetInfo *info;
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GNode *tenc;
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const guint8 *tenc_data;
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guint32 isEncrypted;
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guint32 is_encrypted;
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guint8 iv_size;
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const guint8 *default_kid;
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GstBuffer *kid_buf;
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if (G_UNLIKELY (!stream->protection_scheme_info))
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stream->protection_scheme_info =
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g_malloc0 (sizeof (QtDemuxCencSampleSetInfo));
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info = (QtDemuxCencSampleSetInfo *) stream->protection_scheme_info;
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tenc = qtdemux_tree_get_child_by_type (schi, FOURCC_tenc);
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if (!tenc) {
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@ -10008,22 +10049,42 @@ qtdemux_parse_protection_scheme_info (GstQTDemux * qtdemux,
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return FALSE;
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}
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tenc_data = (const guint8 *) tenc->data + 12;
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isEncrypted = QT_UINT24 (tenc_data);
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is_encrypted = QT_UINT24 (tenc_data);
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iv_size = QT_UINT8 (tenc_data + 3);
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default_kid = (tenc_data + 4);
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kid_buf = gst_buffer_new_allocate (NULL, 16, NULL);
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gst_buffer_fill (kid_buf, 0, default_kid, 16);
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if (info->default_properties)
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gst_structure_free (info->default_properties);
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info->default_properties =
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gst_structure_new ("application/x-cenc",
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"iv_size", G_TYPE_UINT, iv_size,
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"encrypted", G_TYPE_BOOLEAN, (isEncrypted == 1),
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"kid", GST_TYPE_BUFFER, kid_buf, NULL);
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GST_DEBUG_OBJECT (qtdemux, "default sample properties: "
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"is_encrypted=%u, iv_size=%u", isEncrypted, iv_size);
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gst_buffer_unref (kid_buf);
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qtdemux_update_default_sample_encryption_settings (qtdemux, info,
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is_encrypted, iv_size, default_kid);
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} else if (stream->protection_scheme_type == FOURCC_piff) {
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GstByteReader br;
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static const guint8 piff_track_encryption_uuid[] = {
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0x89, 0x74, 0xdb, 0xce, 0x7b, 0xe7, 0x4c, 0x51,
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0x84, 0xf9, 0x71, 0x48, 0xf9, 0x88, 0x25, 0x54
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};
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tenc = qtdemux_tree_get_child_by_type (schi, FOURCC_uuid);
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if (!tenc) {
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GST_ERROR_OBJECT (qtdemux, "schi box does not contain tenc box, "
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"which is mandatory for Common Encryption");
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return FALSE;
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}
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tenc_data = (const guint8 *) tenc->data + 8;
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if (memcmp (tenc_data, piff_track_encryption_uuid, 16) != 0) {
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gchar *box_uuid = qtdemux_uuid_bytes_to_string (tenc_data);
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GST_ERROR_OBJECT (qtdemux,
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"Unsupported track encryption box with uuid: %s", box_uuid);
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g_free (box_uuid);
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return FALSE;
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}
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tenc_data = (const guint8 *) tenc->data + 16 + 12;
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gst_byte_reader_init (&br, tenc_data, 20);
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if (!qtdemux_update_default_piff_encryption_settings (qtdemux, info, &br)) {
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GST_ERROR_OBJECT (qtdemux, "PIFF track box parsing error");
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return FALSE;
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}
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stream->protection_scheme_type = FOURCC_cenc;
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}
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return TRUE;
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}
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