blob: a46840b25a9f9c718cd85a2365abbb36c1ff73b0 [file] [log] [blame]
// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/media/session/media_metadata_sanitizer.h"
#include <algorithm>
#include <string>
#include "services/media_session/public/cpp/media_image.h"
#include "services/media_session/public/cpp/media_metadata.h"
namespace content {
namespace {
// Maximum length for all the strings inside the MediaMetadata when it is sent
// over IPC. The renderer process should truncate the strings before sending
// the MediaMetadata and the browser process must do the same when receiving
// it.
const size_t kMaxIPCStringLength = 4 * 1024;
// Maximum type length of MediaImage, which conforms to RFC 4288
// (https://tools.ietf.org/html/rfc4288).
const size_t kMaxMediaImageTypeLength = 2 * 127 + 1;
// Maximum number of MediaImages inside the MediaMetadata.
const size_t kMaxNumberOfMediaImages = 10;
// Maximum of sizes in a MediaImage.
const size_t kMaxNumberOfMediaImageSizes = 10;
bool CheckMediaImageSrcSanity(const GURL& src) {
if (!src.is_valid())
return false;
if (!src.SchemeIsHTTPOrHTTPS() &&
!src.SchemeIs(url::kDataScheme) &&
!src.SchemeIs(url::kBlobScheme))
return false;
if (src.spec().size() > url::kMaxURLChars)
return false;
return true;
}
bool CheckMediaImageSanity(const media_session::MediaImage& image) {
if (!CheckMediaImageSrcSanity(image.src))
return false;
if (image.type.size() > kMaxMediaImageTypeLength)
return false;
if (image.sizes.size() > kMaxNumberOfMediaImageSizes)
return false;
return true;
}
} // anonymous namespace
bool MediaMetadataSanitizer::CheckSanity(
const blink::mojom::SpecMediaMetadataPtr& metadata) {
if (metadata->title.size() > kMaxIPCStringLength)
return false;
if (metadata->artist.size() > kMaxIPCStringLength)
return false;
if (metadata->album.size() > kMaxIPCStringLength)
return false;
if (metadata->artwork.size() > kMaxNumberOfMediaImages)
return false;
for (const auto& image : metadata->artwork) {
if (!CheckMediaImageSanity(image))
return false;
}
return true;
}
} // namespace content