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1 /*
2  * Copyright (C) 2009 Google Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are
6  * met:
7  *
8  *     * Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *     * Redistributions in binary form must reproduce the above
11  * copyright notice, this list of conditions and the following disclaimer
12  * in the documentation and/or other materials provided with the
13  * distribution.
14  *     * Neither the name of Google Inc. nor the names of its
15  * contributors may be used to endorse or promote products derived from
16  * this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #include "config.h"
32 #include "platform/weborigin/OriginAccessEntry.h"
33 
34 #include "platform/weborigin/SecurityOrigin.h"
35 #include "public/platform/Platform.h"
36 #include "public/platform/WebPublicSuffixList.h"
37 
38 namespace blink {
39 
OriginAccessEntry(const String & protocol,const String & host,SubdomainSetting subdomainSetting,IPAddressSetting ipAddressSetting)40 OriginAccessEntry::OriginAccessEntry(const String& protocol, const String& host, SubdomainSetting subdomainSetting, IPAddressSetting ipAddressSetting)
41     : m_protocol(protocol.lower())
42     , m_host(host.lower())
43     , m_subdomainSettings(subdomainSetting)
44     , m_ipAddressSettings(ipAddressSetting)
45     , m_hostIsPublicSuffix(false)
46 {
47     ASSERT(subdomainSetting == AllowSubdomains || subdomainSetting == DisallowSubdomains);
48 
49     // Assume that any host that ends with a digit is trying to be an IP address.
50     m_hostIsIPAddress = !m_host.isEmpty() && isASCIIDigit(m_host[m_host.length() - 1]);
51 
52     // Look for top-level domains, either with or without an additional dot.
53     if (!m_hostIsIPAddress) {
54         blink::WebPublicSuffixList* suffixList = blink::Platform::current()->publicSuffixList();
55         if (suffixList && m_host.length() <= suffixList->getPublicSuffixLength(m_host) + 1)
56             m_hostIsPublicSuffix = true;
57     }
58 }
59 
matchesOrigin(const SecurityOrigin & origin) const60 OriginAccessEntry::MatchResult OriginAccessEntry::matchesOrigin(const SecurityOrigin& origin) const
61 {
62     ASSERT(origin.host() == origin.host().lower());
63     ASSERT(origin.protocol() == origin.protocol().lower());
64 
65     if (m_protocol != origin.protocol())
66         return DoesNotMatchOrigin;
67 
68     // Special case: Include subdomains and empty host means "all hosts, including ip addresses".
69     if (m_subdomainSettings == AllowSubdomains && m_host.isEmpty())
70         return MatchesOrigin;
71 
72     // Exact match.
73     if (m_host == origin.host())
74         return MatchesOrigin;
75 
76     // Otherwise we can only match if we're matching subdomains.
77     if (m_subdomainSettings == DisallowSubdomains)
78         return DoesNotMatchOrigin;
79 
80     // Don't try to do subdomain matching on IP addresses (except for testing).
81     if (m_hostIsIPAddress && m_ipAddressSettings == TreatIPAddressAsIPAddress)
82         return DoesNotMatchOrigin;
83 
84     // Match subdomains.
85     if (origin.host().length() <= m_host.length() || origin.host()[origin.host().length() - m_host.length() - 1] != '.' || !origin.host().endsWith(m_host))
86         return DoesNotMatchOrigin;
87 
88     if (m_hostIsPublicSuffix)
89         return MatchesOriginButIsPublicSuffix;
90 
91     return MatchesOrigin;
92 }
93 
94 } // namespace blink
95