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
38namespace blink {
39
40OriginAccessEntry::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
60OriginAccessEntry::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