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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef nsIDNService_h__
#define nsIDNService_h__
#include "nsIIDNService.h"
#include "nsCOMPtr.h"
#include "mozilla/RWLock.h"
#include "mozilla/intl/UnicodeScriptCodes.h"
#include "mozilla/net/IDNBlocklistUtils.h"
#include "mozilla/intl/IDNA.h"
#include "mozilla/UniquePtr.h"
#include "nsString.h"
class nsIPrefBranch;
//-----------------------------------------------------------------------------
// nsIDNService
//-----------------------------------------------------------------------------
namespace mozilla::net {
enum ScriptCombo : int32_t;
}
class nsIDNService final : public nsIIDNService {
public:
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIIDNSERVICE
nsIDNService();
nsresult Init();
protected:
virtual ~nsIDNService();
private:
enum stringPrepFlag {
eStringPrepForDNS,
eStringPrepForUI,
eStringPrepIgnoreErrors
};
/**
* Convert the following characters that must be recognized as label
* separators per RFC 3490 to ASCII full stop characters
*
* U+3002 (ideographic full stop)
* U+FF0E (fullwidth full stop)
* U+FF61 (halfwidth ideographic full stop)
*/
void normalizeFullStops(nsAString& s);
/**
* Convert and encode a DNS label in ACE/punycode.
* @param flag
* if eStringPrepIgnoreErrors, all non-ASCII labels are
* converted to punycode.
* if eStringPrepForUI, only labels that are considered safe
* for display are converted.
* @see isLabelSafe
* if eStringPrepForDNS and stringPrep finds an illegal
* character, returns NS_FAILURE and out is empty
*/
nsresult stringPrepAndACE(const nsAString& in, nsACString& out,
stringPrepFlag flag);
/**
* Convert a DNS label using the stringprep profile defined in RFC 3454
*/
nsresult stringPrep(const nsAString& in, nsAString& out, stringPrepFlag flag);
/**
* Decode an ACE-encoded DNS label to UTF-8
*
* @param flag
* if eStringPrepForUI and the label is not considered safe to
* display, the output is the same as the input
* @see isLabelSafe
*/
nsresult decodeACE(const nsACString& in, nsACString& out,
stringPrepFlag flag);
/**
* Convert complete domain names between UTF8 and ACE and vice versa
*
* @param flag is passed to decodeACE or stringPrepAndACE for each
* label individually, so the output may contain some labels in
* punycode and some in UTF-8
*/
nsresult UTF8toACE(const nsACString& input, nsACString& ace,
stringPrepFlag flag);
nsresult ACEtoUTF8(const nsACString& input, nsACString& _retval,
stringPrepFlag flag);
void prefsChanged(const char* pref);
static void PrefChanged(const char* aPref, void* aSelf) {
auto* self = static_cast<nsIDNService*>(aSelf);
self->prefsChanged(aPref);
}
/**
* Determine whether a label is considered safe to display to the user
* according to the algorithm defined in UTR 39 and the profile
* selected in mRestrictionProfile.
*
* For the ASCII-only profile, returns false for all labels containing
* non-ASCII characters.
*
* For the other profiles, returns false for labels containing any of
* the following:
*
* Characters in scripts other than the "recommended scripts" and
* "aspirational scripts" defined in
* http://www.unicode.org/reports/tr31/#Table_Recommended_Scripts
* and http://www.unicode.org/reports/tr31/#Aspirational_Use_Scripts
* This includes codepoints that are not defined as Unicode
* characters
*
* Illegal combinations of scripts (@see illegalScriptCombo)
*
* Numbers from more than one different numbering system
*
* Sequences of the same non-spacing mark
*
* Both simplified-only and traditional-only Chinese characters
* XXX this test was disabled by bug 857481
*/
bool isLabelSafe(const nsAString& label) MOZ_EXCLUDES(mLock);
/**
* Determine whether a combination of scripts in a single label is
* permitted according to the algorithm defined in UTR 39 and the
* profile selected in mRestrictionProfile.
*
* For the "Highly restrictive" profile, all characters in each
* identifier must be from a single script, or from the combinations:
* Latin + Han + Hiragana + Katakana;
* Latin + Han + Bopomofo; or
* Latin + Han + Hangul
*
* For the "Moderately restrictive" profile, Latin is also allowed
* with other scripts except Cyrillic and Greek
*/
bool illegalScriptCombo(mozilla::intl::Script script,
mozilla::net::ScriptCombo& savedScript)
MOZ_REQUIRES_SHARED(mLock);
/**
* Convert a DNS label from ASCII to Unicode using IDNA2008
*/
nsresult IDNA2008ToUnicode(const nsACString& input, nsAString& output);
/**
* Convert a DNS label to a normalized form conforming to IDNA2008
*/
nsresult IDNA2008StringPrep(const nsAString& input, nsAString& output,
stringPrepFlag flag);
// never mutated after initializing.
mozilla::UniquePtr<mozilla::intl::IDNA> mIDNA;
// We use this rwlock to guard access to:
// |mIDNBlocklist|, |mRestrictionProfile|
mozilla::RWLock mLock{"nsIDNService"};
// guarded by mLock
nsTArray<mozilla::net::BlocklistRange> mIDNBlocklist MOZ_GUARDED_BY(mLock);
/**
* Restriction-level Detection profiles defined in UTR 39
* http://www.unicode.org/reports/tr39/#Restriction_Level_Detection,
* and selected by the pref network.IDN.restriction_profile
*/
enum restrictionProfile {
eASCIIOnlyProfile,
eHighlyRestrictiveProfile,
eModeratelyRestrictiveProfile
};
// guarded by mLock;
restrictionProfile mRestrictionProfile MOZ_GUARDED_BY(mLock){
eASCIIOnlyProfile};
};
#endif // nsIDNService_h__
|
