1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/net/HttpAuthUtils.h"
#include "mozilla/Tokenizer.h"
#include "nsIURI.h"
#include "nsNetUtil.h"
#include "nsUnicharUtils.h"
#include "nsIPrefBranch.h"
#include "nsIPrefService.h"
namespace mozilla {
namespace net {
namespace auth {
namespace detail {
bool MatchesBaseURI(const nsACString& matchScheme, const nsACString& matchHost,
int32_t matchPort, nsDependentCSubstring const& url) {
// check if scheme://host:port matches baseURI
// parse the base URI
mozilla::Tokenizer t(url);
mozilla::Tokenizer::Token token;
t.SkipWhites();
// We don't know if the url to check against starts with scheme
// or a host name. Start recording here.
t.Record();
(void)t.Next(token);
// The ipv6 literals MUST be enclosed with [] in the preference.
bool ipv6 = false;
if (token.Equals(mozilla::Tokenizer::Token::Char('['))) {
nsDependentCSubstring ipv6BareLiteral;
if (!t.ReadUntil(mozilla::Tokenizer::Token::Char(']'), ipv6BareLiteral)) {
// Broken ipv6 literal
return false;
}
nsDependentCSubstring ipv6Literal;
t.Claim(ipv6Literal, mozilla::Tokenizer::INCLUDE_LAST);
if (!matchHost.Equals(ipv6Literal, nsCaseInsensitiveUTF8StringComparator) &&
!matchHost.Equals(ipv6BareLiteral,
nsCaseInsensitiveUTF8StringComparator)) {
return false;
}
ipv6 = true;
} else if (t.CheckChar(':') && t.CheckChar('/') && t.CheckChar('/')) {
if (!matchScheme.Equals(token.Fragment())) {
return false;
}
// Re-start recording the hostname from the point after scheme://.
t.Record();
}
while (t.Next(token)) {
bool eof = token.Equals(mozilla::Tokenizer::Token::EndOfFile());
bool port = token.Equals(mozilla::Tokenizer::Token::Char(':'));
if (eof || port) {
if (!ipv6) { // Match already performed above.
nsDependentCSubstring hostName;
t.Claim(hostName);
// An empty hostname means to accept everything for the schema
if (!hostName.IsEmpty()) {
/*
host: bar.com foo.bar.com foobar.com foo.bar.com bar.com
pref: bar.com bar.com bar.com .bar.com .bar.com
result: accept accept reject accept reject
*/
if (!StringEndsWith(matchHost, hostName,
nsCaseInsensitiveUTF8StringComparator)) {
return false;
}
if (matchHost.Length() > hostName.Length() &&
matchHost[matchHost.Length() - hostName.Length() - 1] != '.' &&
hostName[0] != '.') {
return false;
}
}
}
if (port) {
uint16_t portNumber;
if (!t.ReadInteger(&portNumber)) {
// Missing port number
return false;
}
if (matchPort != portNumber) {
return false;
}
if (!t.CheckEOF()) {
return false;
}
}
} else if (ipv6) {
// After an ipv6 literal there can only be EOF or :port. Everything else
// must be treated as non-match/broken input.
return false;
}
}
// All negative checks has passed positively.
return true;
}
} // namespace detail
bool URIMatchesPrefPattern(nsIURI* uri, const char* pref) {
nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
if (!prefs) {
return false;
}
nsAutoCString scheme, host;
int32_t port;
if (NS_FAILED(uri->GetScheme(scheme))) {
return false;
}
if (NS_FAILED(uri->GetAsciiHost(host))) {
return false;
}
port = NS_GetRealPort(uri);
if (port == -1) {
return false;
}
nsAutoCString hostList;
if (NS_FAILED(prefs->GetCharPref(pref, hostList))) {
return false;
}
// pseudo-BNF
// ----------
//
// url-list base-url ( base-url "," LWS )*
// base-url ( scheme-part | host-part | scheme-part host-part )
// scheme-part scheme "://"
// host-part host [":" port]
//
// for example:
// "https://, http://office.foo.com"
//
mozilla::Tokenizer t(hostList);
while (!t.CheckEOF()) {
t.SkipWhites();
nsDependentCSubstring url;
(void)t.ReadUntil(mozilla::Tokenizer::Token::Char(','), url);
if (url.IsEmpty()) {
continue;
}
if (detail::MatchesBaseURI(scheme, host, port, url)) {
return true;
}
}
return false;
}
} // namespace auth
} // namespace net
} // namespace mozilla
|
