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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
// Copyright (c) 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/safe_browsing_db/util.h"
#include <stddef.h>
#include "base/macros.h"
#include "base/trace_event/trace_event.h"
#include "crypto/sha2.h"
#include "net/base/escape.h"
#include "url/gurl.h"
namespace safe_browsing {
// Utility functions -----------------------------------------------------------
namespace {
bool IsKnownList(const std::string& name) {
for (size_t i = 0; i < arraysize(kAllLists); ++i) {
if (!strcmp(kAllLists[i], name.c_str())) {
return true;
}
}
return false;
}
} // namespace
// ThreatMetadata ------------------------------------------------------------
ThreatMetadata::ThreatMetadata()
: threat_pattern_type(ThreatPatternType::NONE) {}
ThreatMetadata::ThreatMetadata(const ThreatMetadata& other) = default;
ThreatMetadata::~ThreatMetadata() {}
bool ThreatMetadata::operator==(const ThreatMetadata& other) const {
return threat_pattern_type == other.threat_pattern_type &&
api_permissions == other.api_permissions &&
population_id == other.population_id;
}
bool ThreatMetadata::operator!=(const ThreatMetadata& other) const {
return !operator==(other);
}
// SBCachedFullHashResult ------------------------------------------------------
SBCachedFullHashResult::SBCachedFullHashResult() {}
SBCachedFullHashResult::SBCachedFullHashResult(
const base::Time& in_expire_after)
: expire_after(in_expire_after) {}
SBCachedFullHashResult::SBCachedFullHashResult(
const SBCachedFullHashResult& other) = default;
SBCachedFullHashResult::~SBCachedFullHashResult() {}
// Listnames that browser can process.
const char kMalwareList[] = "goog-malware-shavar";
const char kPhishingList[] = "goog-phish-shavar";
const char kBinUrlList[] = "goog-badbinurl-shavar";
const char kCsdWhiteList[] = "goog-csdwhite-sha256";
const char kDownloadWhiteList[] = "goog-downloadwhite-digest256";
const char kExtensionBlacklist[] = "goog-badcrxids-digestvar";
const char kIPBlacklist[] = "goog-badip-digest256";
const char kUnwantedUrlList[] = "goog-unwanted-shavar";
const char kModuleWhitelist[] = "goog-whitemodule-digest256";
const char kResourceBlacklist[] = "goog-badresource-shavar";
const char* kAllLists[10] = {
kMalwareList, kPhishingList, kBinUrlList, kCsdWhiteList,
kDownloadWhiteList, kExtensionBlacklist, kIPBlacklist, kUnwantedUrlList,
kModuleWhitelist, kResourceBlacklist,
};
ListType GetListId(const base::StringPiece& name) {
ListType id;
if (name == kMalwareList) {
id = MALWARE;
} else if (name == kPhishingList) {
id = PHISH;
} else if (name == kBinUrlList) {
id = BINURL;
} else if (name == kCsdWhiteList) {
id = CSDWHITELIST;
} else if (name == kDownloadWhiteList) {
id = DOWNLOADWHITELIST;
} else if (name == kExtensionBlacklist) {
id = EXTENSIONBLACKLIST;
} else if (name == kIPBlacklist) {
id = IPBLACKLIST;
} else if (name == kUnwantedUrlList) {
id = UNWANTEDURL;
} else if (name == kModuleWhitelist) {
id = MODULEWHITELIST;
} else if (name == kResourceBlacklist) {
id = RESOURCEBLACKLIST;
} else {
id = INVALID;
}
return id;
}
bool GetListName(ListType list_id, std::string* list) {
switch (list_id) {
case MALWARE:
*list = kMalwareList;
break;
case PHISH:
*list = kPhishingList;
break;
case BINURL:
*list = kBinUrlList;
break;
case CSDWHITELIST:
*list = kCsdWhiteList;
break;
case DOWNLOADWHITELIST:
*list = kDownloadWhiteList;
break;
case EXTENSIONBLACKLIST:
*list = kExtensionBlacklist;
break;
case IPBLACKLIST:
*list = kIPBlacklist;
break;
case UNWANTEDURL:
*list = kUnwantedUrlList;
break;
case MODULEWHITELIST:
*list = kModuleWhitelist;
break;
case RESOURCEBLACKLIST:
*list = kResourceBlacklist;
break;
default:
return false;
}
DCHECK(IsKnownList(*list));
return true;
}
SBFullHash SBFullHashForString(const base::StringPiece& str) {
SBFullHash h;
crypto::SHA256HashString(str, &h.full_hash, sizeof(h.full_hash));
return h;
}
SBFullHash StringToSBFullHash(const std::string& hash_in) {
DCHECK_EQ(crypto::kSHA256Length, hash_in.size());
SBFullHash hash_out;
memcpy(hash_out.full_hash, hash_in.data(), crypto::kSHA256Length);
return hash_out;
}
std::string SBFullHashToString(const SBFullHash& hash) {
DCHECK_EQ(crypto::kSHA256Length, sizeof(hash.full_hash));
return std::string(hash.full_hash, sizeof(hash.full_hash));
}
void UrlToFullHashes(const GURL& url,
bool include_whitelist_hashes,
std::vector<SBFullHash>* full_hashes) {
// Include this function in traces because it's not cheap so it should be
// called sparingly.
TRACE_EVENT2("loader", "safe_browsing::UrlToFullHashes", "url", url.spec(),
"include_whitelist_hashes", include_whitelist_hashes);
std::string canon_host;
std::string canon_path;
std::string canon_query;
V4ProtocolManagerUtil::CanonicalizeUrl(url, &canon_host, &canon_path,
&canon_query);
std::vector<std::string> hosts;
if (url.HostIsIPAddress()) {
hosts.push_back(url.host());
} else {
V4ProtocolManagerUtil::GenerateHostVariantsToCheck(canon_host, &hosts);
}
std::vector<std::string> paths;
V4ProtocolManagerUtil::GeneratePathVariantsToCheck(canon_path, canon_query,
&paths);
for (const std::string& host : hosts) {
for (const std::string& path : paths) {
full_hashes->push_back(
SBFullHashForString(host + path));
// We may have /foo as path-prefix in the whitelist which should
// also match with /foo/bar and /foo?bar. Hence, for every path
// that ends in '/' we also add the path without the slash.
if (include_whitelist_hashes && path.size() > 1 && path.back() == '/') {
full_hashes->push_back(SBFullHashForString(
host + path.substr(0, path.size() - 1)));
}
}
}
}
} // namespace safe_browsing
|
