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// Copyright (c) 2010 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 "webkit/glue/site_isolation_metrics.h"
#include <set>
#include "base/hash_tables.h"
#include "base/histogram.h"
#include "net/base/mime_sniffer.h"
#include "third_party/WebKit/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/WebKit/chromium/public/WebSecurityOrigin.h"
#include "third_party/WebKit/WebKit/chromium/public/WebString.h"
#include "third_party/WebKit/WebKit/chromium/public/WebURL.h"
#include "third_party/WebKit/WebKit/chromium/public/WebURLRequest.h"
#include "third_party/WebKit/WebKit/chromium/public/WebURLResponse.h"
using WebKit::WebFrame;
using WebKit::WebSecurityOrigin;
using WebKit::WebString;
using WebKit::WebURL;
using WebKit::WebURLRequest;
using WebKit::WebURLResponse;
namespace webkit_glue {
typedef base::hash_map<unsigned, WebURLRequest::TargetType> TargetTypeMap;
typedef base::hash_map<std::string, int> MimeTypeMap;
typedef std::set<std::string> CrossOriginTextHtmlResponseSet;
static TargetTypeMap* GetTargetTypeMap() {
static TargetTypeMap target_type_map_;
return &target_type_map_;
}
// Copied from net/base/mime_util.cc, supported_non_image_types[]
static const char* const kCrossOriginMimeTypesToLog[] = {
"text/cache-manifest",
"text/html",
"text/xml",
"text/xsl",
"text/plain",
"text/vnd.chromium.ftp-dir",
"text/",
"text/css",
"image/svg+xml",
"application/xml",
"application/xhtml+xml",
"application/rss+xml",
"application/atom+xml",
"application/json",
"application/x-x509-user-cert",
"multipart/x-mixed-replace"
};
static MimeTypeMap* GetMimeTypeMap() {
static MimeTypeMap mime_type_map_;
if (!mime_type_map_.size()) {
for (size_t i = 0; i < arraysize(kCrossOriginMimeTypesToLog); ++i)
mime_type_map_[kCrossOriginMimeTypesToLog[i]] = i;
}
return &mime_type_map_;
}
// This is set is used to keep track of the response urls that we want to
// sniff, since we will have to wait for the payload to arrive.
static CrossOriginTextHtmlResponseSet* GetCrossOriginTextHtmlResponseSet() {
static CrossOriginTextHtmlResponseSet cross_origin_text_html_response_set_;
return &cross_origin_text_html_response_set_;
}
static void LogVerifiedTextHtmlResponse() {
UMA_HISTOGRAM_COUNTS(
"SiteIsolation.CrossSiteNonFrameResponse_verified_texthtml", 1);
}
static void LogMislabeledTextHtmlResponse() {
UMA_HISTOGRAM_COUNTS(
"SiteIsolation.CrossSiteNonFrameResponse_mislabeled_texthtml", 1);
}
void SiteIsolationMetrics::AddRequest(unsigned identifier,
WebURLRequest::TargetType target_type) {
TargetTypeMap& target_type_map = *GetTargetTypeMap();
target_type_map[identifier] = target_type;
}
void SiteIsolationMetrics::LogMimeTypeForCrossOriginRequest(
WebFrame* frame, unsigned identifier, const WebURLResponse& response) {
TargetTypeMap& target_type_map = *GetTargetTypeMap();
TargetTypeMap::iterator iter = target_type_map.find(identifier);
if (iter != target_type_map.end()) {
WebURLRequest::TargetType target_type = iter->second;
target_type_map.erase(iter);
// We want to log any cross-site request that we don't think a renderer
// should be allowed to make. We can safely ignore frame requests (since
// we'd like those to be in a separate renderer) and plugin requests, even
// if they are cross-origin.
if (target_type != WebURLRequest::TargetIsMainFrame &&
target_type != WebURLRequest::TargetIsSubFrame &&
target_type != WebURLRequest::TargetIsObject &&
!frame->securityOrigin().canAccess(
WebSecurityOrigin::create(response.url()))) {
std::string mime_type = response.mimeType().utf8();
MimeTypeMap mime_type_map = *GetMimeTypeMap();
MimeTypeMap::iterator mime_type_iter = mime_type_map.find(mime_type);
if (mime_type_iter != mime_type_map.end()) {
UMA_HISTOGRAM_ENUMERATION(
"SiteIsolation.CrossSiteNonFrameResponse_MIME_Type",
mime_type_iter->second,
arraysize(kCrossOriginMimeTypesToLog));
// We also should check access control headers, in case this
// cross-origin request has been explicitly permitted.
// This is basically a copy of the logic of passesAccessControlCheck()
// in WebCore/loader/CrossOriginAccessControl.cpp.
WebString access_control_origin = response.httpHeaderField(
WebString::fromUTF8("Access-Control-Allow-Origin"));
if (access_control_origin != WebString::fromUTF8("*")
&& !frame->securityOrigin().canAccess(
WebSecurityOrigin::createFromString(access_control_origin))) {
UMA_HISTOGRAM_ENUMERATION(
"SiteIsolation.CrossSiteNonFrameResponse_With_CORS_MIME_Type",
mime_type_iter->second,
arraysize(kCrossOriginMimeTypesToLog));
}
// Sometimes resources are mislabeled as text/html. Once we have some
// of the payload, we want to determine if this was actually text/html.
if (mime_type == "text/html")
GetCrossOriginTextHtmlResponseSet()->insert(response.url().spec());
}
}
}
}
void SiteIsolationMetrics::SniffCrossOriginHTML(const WebURL& response_url,
const char* data,
int len) {
if (!response_url.isValid())
return;
CrossOriginTextHtmlResponseSet& cross_origin_text_html_response_set =
*GetCrossOriginTextHtmlResponseSet();
CrossOriginTextHtmlResponseSet::iterator request_iter =
cross_origin_text_html_response_set.find(response_url.spec());
if (request_iter != cross_origin_text_html_response_set.end()) {
std::string sniffed_mime_type;
bool successful = net::SniffMimeType(data, len, response_url,
"", &sniffed_mime_type);
if (successful && sniffed_mime_type == "text/html")
LogVerifiedTextHtmlResponse();
else
LogMislabeledTextHtmlResponse();
cross_origin_text_html_response_set.erase(request_iter);
}
}
void SiteIsolationMetrics::RemoveCompletedResponse(
const WebURL& response_url) {
if (!response_url.isValid())
return;
// Ensure we don't leave responses in the set after they've completed.
CrossOriginTextHtmlResponseSet& cross_origin_text_html_response_set =
*GetCrossOriginTextHtmlResponseSet();
CrossOriginTextHtmlResponseSet::iterator request_iter =
cross_origin_text_html_response_set.find(response_url.spec());
if (request_iter != cross_origin_text_html_response_set.end()) {
LogMislabeledTextHtmlResponse();
cross_origin_text_html_response_set.erase(request_iter);
}
}
} // namespace webkit_glue
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