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/*
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/platform/weborigin/origin_access_entry.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/public/platform/web_public_suffix_list.h"
#include "third_party/blink/renderer/platform/weborigin/kurl.h"
#include "third_party/blink/renderer/platform/weborigin/security_origin.h"
#include "url/third_party/mozilla/url_parse.h"
#include "url/url_canon.h"
namespace blink {
namespace {
// TODO(mkwst): This basically replicates GURL::HostIsIPAddress. If/when
// we re-evaluate everything after merging the Blink and Chromium
// repositories, perhaps we can just use that directly.
bool HostIsIPAddress(const String& host) {
if (host.IsEmpty())
return false;
String protocol("https://");
KURL url(NullURL(), protocol + host + "/");
if (!url.IsValid())
return false;
url::RawCanonOutputT<char, 128> ignored_output;
url::CanonHostInfo host_info;
url::Component host_component(0,
static_cast<int>(url.Host().Utf8().length()));
url::CanonicalizeIPAddress(url.Host().Utf8().data(), host_component,
&ignored_output, &host_info);
return host_info.IsIPAddress();
}
bool IsSubdomainOfHost(const String& subdomain, const String& host) {
if (subdomain.length() <= host.length())
return false;
if (subdomain[subdomain.length() - host.length() - 1] != '.')
return false;
if (!subdomain.EndsWith(host))
return false;
return true;
}
} // namespace
OriginAccessEntry::OriginAccessEntry(const String& protocol,
const String& host,
SubdomainSetting subdomain_setting)
: protocol_(protocol),
host_(host),
subdomain_settings_(subdomain_setting),
host_is_public_suffix_(false) {
DCHECK(subdomain_setting >= kAllowSubdomains ||
subdomain_setting <= kDisallowSubdomains);
host_is_ip_address_ = blink::HostIsIPAddress(host);
// Look for top-level domains, either with or without an additional dot.
if (!host_is_ip_address_) {
WebPublicSuffixList* suffix_list = Platform::Current()->PublicSuffixList();
if (!suffix_list)
return;
size_t public_suffix_length = suffix_list->GetPublicSuffixLength(host_);
if (host_.length() <= public_suffix_length + 1) {
host_is_public_suffix_ = true;
} else if (subdomain_setting == kAllowRegisterableDomains &&
public_suffix_length) {
// The "2" in the next line is 1 for the '.', plus a 1-char minimum label
// length.
const size_t dot =
host_.ReverseFind('.', host_.length() - public_suffix_length - 2);
if (dot == kNotFound)
registerable_domain_ = host;
else
registerable_domain_ = host.Substring(dot + 1);
}
}
}
OriginAccessEntry::MatchResult OriginAccessEntry::MatchesOrigin(
const SecurityOrigin& origin) const {
if (protocol_ != origin.Protocol())
return kDoesNotMatchOrigin;
return MatchesDomain(origin);
}
OriginAccessEntry::MatchResult OriginAccessEntry::MatchesDomain(
const SecurityOrigin& origin) const {
// Special case: Include subdomains and empty host means "all hosts, including
// ip addresses".
if (subdomain_settings_ != kDisallowSubdomains && host_.IsEmpty())
return kMatchesOrigin;
// Exact match.
if (host_ == origin.Host())
return kMatchesOrigin;
// Don't try to do subdomain matching on IP addresses.
if (host_is_ip_address_)
return kDoesNotMatchOrigin;
// Match subdomains.
switch (subdomain_settings_) {
case kDisallowSubdomains:
return kDoesNotMatchOrigin;
case kAllowSubdomains:
if (!IsSubdomainOfHost(origin.Host(), host_))
return kDoesNotMatchOrigin;
break;
case kAllowRegisterableDomains:
// Fall back to a simple subdomain check if no registerable domain could
// be found:
if (registerable_domain_.IsEmpty()) {
if (!IsSubdomainOfHost(origin.Host(), host_))
return kDoesNotMatchOrigin;
} else if (registerable_domain_ != origin.Host() &&
!IsSubdomainOfHost(origin.Host(), registerable_domain_)) {
return kDoesNotMatchOrigin;
}
break;
};
if (host_is_public_suffix_)
return kMatchesOriginButIsPublicSuffix;
return kMatchesOrigin;
}
} // namespace blink
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