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Issue 2448943002: Refactor SecurityStateModel/Clients for simplicity and reusability. (Closed)
Patch Set: update comments. Created 4 years, 1 month ago
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1 // Copyright 2015 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "chrome/browser/ssl/chrome_security_state_model_client.h"
6
7 #include <vector>
8
9 #include "base/command_line.h"
10 #include "base/metrics/field_trial.h"
11 #include "base/metrics/histogram_macros.h"
12 #include "base/strings/string16.h"
13 #include "base/strings/utf_string_conversions.h"
14 #include "build/build_config.h"
15 #include "chrome/browser/browser_process.h"
16 #include "chrome/browser/chromeos/policy/policy_cert_service.h"
17 #include "chrome/browser/chromeos/policy/policy_cert_service_factory.h"
18 #include "chrome/browser/profiles/profile.h"
19 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
20 #include "chrome/browser/safe_browsing/ui_manager.h"
21 #include "chrome/grit/chromium_strings.h"
22 #include "chrome/grit/generated_resources.h"
23 #include "content/public/browser/navigation_entry.h"
24 #include "content/public/browser/navigation_handle.h"
25 #include "content/public/browser/render_frame_host.h"
26 #include "content/public/browser/security_style_explanation.h"
27 #include "content/public/browser/security_style_explanations.h"
28 #include "content/public/browser/ssl_status.h"
29 #include "content/public/browser/web_contents.h"
30 #include "content/public/common/origin_util.h"
31 #include "net/base/net_errors.h"
32 #include "net/cert/x509_certificate.h"
33 #include "net/ssl/ssl_cipher_suite_names.h"
34 #include "net/ssl/ssl_connection_status_flags.h"
35 #include "third_party/boringssl/src/include/openssl/ssl.h"
36 #include "ui/base/l10n/l10n_util.h"
37
38 DEFINE_WEB_CONTENTS_USER_DATA_KEY(ChromeSecurityStateModelClient);
39
40 using safe_browsing::SafeBrowsingUIManager;
41 using security_state::SecurityStateModel;
42
43 namespace {
44
45 // Note: This is a lossy operation. Not all of the policies that can be
46 // expressed by a SecurityLevel (a //chrome concept) can be expressed by
47 // a blink::WebSecurityStyle.
48 blink::WebSecurityStyle SecurityLevelToSecurityStyle(
49 SecurityStateModel::SecurityLevel security_level) {
50 switch (security_level) {
51 case SecurityStateModel::NONE:
52 case SecurityStateModel::HTTP_SHOW_WARNING:
53 return blink::WebSecurityStyleUnauthenticated;
54 case SecurityStateModel::SECURITY_WARNING:
55 case SecurityStateModel::SECURE_WITH_POLICY_INSTALLED_CERT:
56 return blink::WebSecurityStyleWarning;
57 case SecurityStateModel::EV_SECURE:
58 case SecurityStateModel::SECURE:
59 return blink::WebSecurityStyleAuthenticated;
60 case SecurityStateModel::DANGEROUS:
61 return blink::WebSecurityStyleAuthenticationBroken;
62 }
63
64 NOTREACHED();
65 return blink::WebSecurityStyleUnknown;
66 }
67
68 void AddConnectionExplanation(
69 const security_state::SecurityStateModel::SecurityInfo& security_info,
70 content::SecurityStyleExplanations* security_style_explanations) {
71
72 // Avoid showing TLS details when we couldn't even establish a TLS connection
73 // (e.g. for net errors) or if there was no real connection (some tests). We
74 // check the |connection_status| to see if there was a connection.
75 if (security_info.connection_status == 0) {
76 return;
77 }
78
79 int ssl_version =
80 net::SSLConnectionStatusToVersion(security_info.connection_status);
81 const char* protocol;
82 net::SSLVersionToString(&protocol, ssl_version);
83 const char* key_exchange;
84 const char* cipher;
85 const char* mac;
86 bool is_aead;
87 bool is_tls13;
88 uint16_t cipher_suite =
89 net::SSLConnectionStatusToCipherSuite(security_info.connection_status);
90 net::SSLCipherSuiteToStrings(&key_exchange, &cipher, &mac, &is_aead,
91 &is_tls13, cipher_suite);
92 base::string16 protocol_name = base::ASCIIToUTF16(protocol);
93 const base::string16 cipher_name =
94 (mac == NULL) ? base::ASCIIToUTF16(cipher)
95 : l10n_util::GetStringFUTF16(IDS_CIPHER_WITH_MAC,
96 base::ASCIIToUTF16(cipher),
97 base::ASCIIToUTF16(mac));
98
99 // Include the key exchange group (previously known as curve) if specified.
100 base::string16 key_exchange_name;
101 if (is_tls13) {
102 key_exchange_name = base::ASCIIToUTF16(
103 SSL_get_curve_name(security_info.key_exchange_group));
104 } else if (security_info.key_exchange_group != 0) {
105 key_exchange_name = l10n_util::GetStringFUTF16(
106 IDS_SSL_KEY_EXCHANGE_WITH_GROUP, base::ASCIIToUTF16(key_exchange),
107 base::ASCIIToUTF16(
108 SSL_get_curve_name(security_info.key_exchange_group)));
109 } else {
110 key_exchange_name = base::ASCIIToUTF16(key_exchange);
111 }
112
113 if (security_info.obsolete_ssl_status == net::OBSOLETE_SSL_NONE) {
114 security_style_explanations->secure_explanations.push_back(
115 content::SecurityStyleExplanation(
116 l10n_util::GetStringUTF8(IDS_STRONG_SSL_SUMMARY),
117 l10n_util::GetStringFUTF8(IDS_STRONG_SSL_DESCRIPTION, protocol_name,
118 key_exchange_name, cipher_name)));
119 return;
120 }
121
122 std::vector<base::string16> description_replacements;
123 int status = security_info.obsolete_ssl_status;
124 int str_id;
125
126 str_id = (status & net::OBSOLETE_SSL_MASK_PROTOCOL)
127 ? IDS_SSL_AN_OBSOLETE_PROTOCOL
128 : IDS_SSL_A_STRONG_PROTOCOL;
129 description_replacements.push_back(l10n_util::GetStringUTF16(str_id));
130 description_replacements.push_back(protocol_name);
131
132 str_id = (status & net::OBSOLETE_SSL_MASK_KEY_EXCHANGE)
133 ? IDS_SSL_AN_OBSOLETE_KEY_EXCHANGE
134 : IDS_SSL_A_STRONG_KEY_EXCHANGE;
135 description_replacements.push_back(l10n_util::GetStringUTF16(str_id));
136 description_replacements.push_back(key_exchange_name);
137
138 str_id = (status & net::OBSOLETE_SSL_MASK_CIPHER) ? IDS_SSL_AN_OBSOLETE_CIPHER
139 : IDS_SSL_A_STRONG_CIPHER;
140 description_replacements.push_back(l10n_util::GetStringUTF16(str_id));
141 description_replacements.push_back(cipher_name);
142
143 security_style_explanations->info_explanations.push_back(
144 content::SecurityStyleExplanation(
145 l10n_util::GetStringUTF8(IDS_OBSOLETE_SSL_SUMMARY),
146 base::UTF16ToUTF8(
147 l10n_util::GetStringFUTF16(IDS_OBSOLETE_SSL_DESCRIPTION,
148 description_replacements, nullptr))));
149 }
150
151 // Check to see whether the security state should be downgraded to reflect
152 // a Safe Browsing verdict.
153 void CheckSafeBrowsingStatus(content::NavigationEntry* entry,
154 content::WebContents* web_contents,
155 SecurityStateModel::VisibleSecurityState* state) {
156 safe_browsing::SafeBrowsingService* sb_service =
157 g_browser_process->safe_browsing_service();
158 if (!sb_service)
159 return;
160 scoped_refptr<SafeBrowsingUIManager> sb_ui_manager = sb_service->ui_manager();
161 if (sb_ui_manager->IsUrlWhitelistedOrPendingForWebContents(
162 entry->GetURL(), false, entry, web_contents, false)) {
163 state->fails_malware_check = true;
164 }
165 }
166
167 } // namespace
168
169 ChromeSecurityStateModelClient::ChromeSecurityStateModelClient(
170 content::WebContents* web_contents)
171 : content::WebContentsObserver(web_contents),
172 web_contents_(web_contents),
173 security_state_model_(new SecurityStateModel()),
174 logged_http_warning_on_current_navigation_(false) {
175 security_state_model_->SetClient(this);
176 }
177
178 ChromeSecurityStateModelClient::~ChromeSecurityStateModelClient() {}
179
180 // static
181 blink::WebSecurityStyle ChromeSecurityStateModelClient::GetSecurityStyle(
182 const security_state::SecurityStateModel::SecurityInfo& security_info,
183 content::SecurityStyleExplanations* security_style_explanations) {
184 const blink::WebSecurityStyle security_style =
185 SecurityLevelToSecurityStyle(security_info.security_level);
186
187 if (security_info.security_level ==
188 security_state::SecurityStateModel::HTTP_SHOW_WARNING) {
189 // If the HTTP_SHOW_WARNING field trial is in use, display an
190 // unauthenticated explanation explaining why the omnibox warning is
191 // present.
192 security_style_explanations->unauthenticated_explanations.push_back(
193 content::SecurityStyleExplanation(
194 l10n_util::GetStringUTF8(IDS_PRIVATE_USER_DATA_INPUT),
195 l10n_util::GetStringUTF8(IDS_PRIVATE_USER_DATA_INPUT_DESCRIPTION)));
196 } else if (security_info.security_level ==
197 security_state::SecurityStateModel::NONE &&
198 security_info.displayed_private_user_data_input_on_http) {
199 // If the HTTP_SHOW_WARNING field trial isn't in use yet, display an
200 // informational note that the omnibox will contain a warning for
201 // this site in a future version of Chrome.
202 security_style_explanations->info_explanations.push_back(
203 content::SecurityStyleExplanation(
204 l10n_util::GetStringUTF8(IDS_PRIVATE_USER_DATA_INPUT),
205 l10n_util::GetStringUTF8(
206 IDS_PRIVATE_USER_DATA_INPUT_FUTURE_DESCRIPTION)));
207 }
208
209 security_style_explanations->ran_insecure_content_style =
210 SecurityLevelToSecurityStyle(
211 SecurityStateModel::kRanInsecureContentLevel);
212 security_style_explanations->displayed_insecure_content_style =
213 SecurityLevelToSecurityStyle(
214 SecurityStateModel::kDisplayedInsecureContentLevel);
215
216 // Check if the page is HTTP; if so, no more explanations are needed. Note
217 // that SecurityStyleUnauthenticated does not necessarily mean that
218 // the page is loaded over HTTP, because the security style merely
219 // represents how the embedder wishes to display the security state of
220 // the page, and the embedder can choose to display HTTPS page as HTTP
221 // if it wants to (for example, displaying deprecated crypto
222 // algorithms with the same UI treatment as HTTP pages).
223 security_style_explanations->scheme_is_cryptographic =
224 security_info.scheme_is_cryptographic;
225 if (!security_info.scheme_is_cryptographic) {
226 return security_style;
227 }
228
229 if (security_info.sha1_deprecation_status ==
230 SecurityStateModel::DEPRECATED_SHA1_MAJOR) {
231 security_style_explanations->broken_explanations.push_back(
232 content::SecurityStyleExplanation(
233 l10n_util::GetStringUTF8(IDS_MAJOR_SHA1),
234 l10n_util::GetStringUTF8(IDS_MAJOR_SHA1_DESCRIPTION),
235 !!security_info.certificate));
236 } else if (security_info.sha1_deprecation_status ==
237 SecurityStateModel::DEPRECATED_SHA1_MINOR) {
238 security_style_explanations->unauthenticated_explanations.push_back(
239 content::SecurityStyleExplanation(
240 l10n_util::GetStringUTF8(IDS_MINOR_SHA1),
241 l10n_util::GetStringUTF8(IDS_MINOR_SHA1_DESCRIPTION),
242 !!security_info.certificate));
243 }
244
245 // Record the presence of mixed content (HTTP subresources on an HTTPS
246 // page).
247 security_style_explanations->ran_mixed_content =
248 security_info.mixed_content_status ==
249 SecurityStateModel::CONTENT_STATUS_RAN ||
250 security_info.mixed_content_status ==
251 SecurityStateModel::CONTENT_STATUS_DISPLAYED_AND_RAN;
252 security_style_explanations->displayed_mixed_content =
253 security_info.mixed_content_status ==
254 SecurityStateModel::CONTENT_STATUS_DISPLAYED ||
255 security_info.mixed_content_status ==
256 SecurityStateModel::CONTENT_STATUS_DISPLAYED_AND_RAN;
257
258 bool is_cert_status_error = net::IsCertStatusError(security_info.cert_status);
259 bool is_cert_status_minor_error =
260 net::IsCertStatusMinorError(security_info.cert_status);
261
262 // If the main resource was loaded no certificate errors or only minor
263 // certificate errors, then record the presence of subresources with
264 // certificate errors. Subresource certificate errors aren't recorded
265 // when the main resource was loaded with major certificate errors
266 // because, in the common case, these subresource certificate errors
267 // would be duplicative with the main resource's error.
268 if (!is_cert_status_error || is_cert_status_minor_error) {
269 security_style_explanations->ran_content_with_cert_errors =
270 security_info.content_with_cert_errors_status ==
271 SecurityStateModel::CONTENT_STATUS_RAN ||
272 security_info.content_with_cert_errors_status ==
273 SecurityStateModel::CONTENT_STATUS_DISPLAYED_AND_RAN;
274 security_style_explanations->displayed_content_with_cert_errors =
275 security_info.content_with_cert_errors_status ==
276 SecurityStateModel::CONTENT_STATUS_DISPLAYED ||
277 security_info.content_with_cert_errors_status ==
278 SecurityStateModel::CONTENT_STATUS_DISPLAYED_AND_RAN;
279 }
280
281 if (is_cert_status_error) {
282 base::string16 error_string = base::UTF8ToUTF16(net::ErrorToString(
283 net::MapCertStatusToNetError(security_info.cert_status)));
284
285 content::SecurityStyleExplanation explanation(
286 l10n_util::GetStringUTF8(IDS_CERTIFICATE_CHAIN_ERROR),
287 l10n_util::GetStringFUTF8(
288 IDS_CERTIFICATE_CHAIN_ERROR_DESCRIPTION_FORMAT, error_string),
289 !!security_info.certificate);
290
291 if (is_cert_status_minor_error) {
292 security_style_explanations->unauthenticated_explanations.push_back(
293 explanation);
294 } else {
295 security_style_explanations->broken_explanations.push_back(explanation);
296 }
297 } else {
298 // If the certificate does not have errors and is not using
299 // deprecated SHA1, then add an explanation that the certificate is
300 // valid.
301 if (security_info.sha1_deprecation_status ==
302 SecurityStateModel::NO_DEPRECATED_SHA1) {
303 security_style_explanations->secure_explanations.push_back(
304 content::SecurityStyleExplanation(
305 l10n_util::GetStringUTF8(IDS_VALID_SERVER_CERTIFICATE),
306 l10n_util::GetStringUTF8(
307 IDS_VALID_SERVER_CERTIFICATE_DESCRIPTION),
308 !!security_info.certificate));
309 }
310 }
311
312 AddConnectionExplanation(security_info, security_style_explanations);
313
314 security_style_explanations->pkp_bypassed = security_info.pkp_bypassed;
315 if (security_info.pkp_bypassed) {
316 security_style_explanations->info_explanations.push_back(
317 content::SecurityStyleExplanation(
318 "Public-Key Pinning Bypassed",
319 "Public-key pinning was bypassed by a local root certificate."));
320 }
321
322 return security_style;
323 }
324
325 void ChromeSecurityStateModelClient::GetSecurityInfo(
326 SecurityStateModel::SecurityInfo* result) const {
327 security_state_model_->GetSecurityInfo(result);
328 }
329
330 void ChromeSecurityStateModelClient::VisibleSecurityStateChanged() {
331 if (logged_http_warning_on_current_navigation_)
332 return;
333
334 security_state::SecurityStateModel::SecurityInfo security_info;
335 GetSecurityInfo(&security_info);
336 if (!security_info.displayed_private_user_data_input_on_http)
337 return;
338
339 std::string warning;
340 bool warning_is_user_visible = false;
341 switch (security_info.security_level) {
342 case security_state::SecurityStateModel::HTTP_SHOW_WARNING:
343 warning =
344 "This page includes a password or credit card input in a non-secure "
345 "context. A warning has been added to the URL bar. For more "
346 "information, see https://goo.gl/zmWq3m.";
347 warning_is_user_visible = true;
348 break;
349 case security_state::SecurityStateModel::NONE:
350 case security_state::SecurityStateModel::DANGEROUS:
351 warning =
352 "This page includes a password or credit card input in a non-secure "
353 "context. A warning will be added to the URL bar in Chrome 56 (Jan "
354 "2017). For more information, see https://goo.gl/zmWq3m.";
355 break;
356 default:
357 return;
358 }
359
360 logged_http_warning_on_current_navigation_ = true;
361 web_contents_->GetMainFrame()->AddMessageToConsole(
362 content::CONSOLE_MESSAGE_LEVEL_WARNING, warning);
363 UMA_HISTOGRAM_BOOLEAN("Security.HTTPBad.UserWarnedAboutSensitiveInput",
364 warning_is_user_visible);
365 }
366
367 void ChromeSecurityStateModelClient::DidFinishNavigation(
368 content::NavigationHandle* navigation_handle) {
369 if (navigation_handle->IsInMainFrame() && !navigation_handle->IsSamePage()) {
370 // Only reset the console message flag for main-frame navigations,
371 // and not for same-page navigations like reference fragments and pushState.
372 logged_http_warning_on_current_navigation_ = false;
373 }
374 }
375
376 bool ChromeSecurityStateModelClient::UsedPolicyInstalledCertificate() {
377 #if defined(OS_CHROMEOS)
378 policy::PolicyCertService* service =
379 policy::PolicyCertServiceFactory::GetForProfile(
380 Profile::FromBrowserContext(web_contents_->GetBrowserContext()));
381 if (service && service->UsedPolicyCertificates())
382 return true;
383 #endif
384 return false;
385 }
386
387 bool ChromeSecurityStateModelClient::IsOriginSecure(const GURL& url) {
388 return content::IsOriginSecure(url);
389 }
390
391 void ChromeSecurityStateModelClient::GetVisibleSecurityState(
392 SecurityStateModel::VisibleSecurityState* state) {
393 content::NavigationEntry* entry =
394 web_contents_->GetController().GetVisibleEntry();
395 if (!entry) {
396 *state = SecurityStateModel::VisibleSecurityState();
397 return;
398 }
399
400 if (!entry->GetSSL().initialized) {
401 *state = SecurityStateModel::VisibleSecurityState();
402 // Connection security information is still being initialized, but malware
403 // status might already be known.
404 CheckSafeBrowsingStatus(entry, web_contents_, state);
405 return;
406 }
407
408 state->connection_info_initialized = true;
409 state->url = entry->GetURL();
410 const content::SSLStatus& ssl = entry->GetSSL();
411 state->certificate = ssl.certificate;
412 state->cert_status = ssl.cert_status;
413 state->connection_status = ssl.connection_status;
414 state->key_exchange_group = ssl.key_exchange_group;
415 state->security_bits = ssl.security_bits;
416 state->pkp_bypassed = ssl.pkp_bypassed;
417 state->sct_verify_statuses.clear();
418 state->sct_verify_statuses.insert(state->sct_verify_statuses.begin(),
419 ssl.sct_statuses.begin(),
420 ssl.sct_statuses.end());
421 state->displayed_mixed_content =
422 !!(ssl.content_status & content::SSLStatus::DISPLAYED_INSECURE_CONTENT);
423 state->ran_mixed_content =
424 !!(ssl.content_status & content::SSLStatus::RAN_INSECURE_CONTENT);
425 state->displayed_content_with_cert_errors =
426 !!(ssl.content_status &
427 content::SSLStatus::DISPLAYED_CONTENT_WITH_CERT_ERRORS);
428 state->ran_content_with_cert_errors =
429 !!(ssl.content_status & content::SSLStatus::RAN_CONTENT_WITH_CERT_ERRORS);
430 state->displayed_password_field_on_http =
431 !!(ssl.content_status &
432 content::SSLStatus::DISPLAYED_PASSWORD_FIELD_ON_HTTP);
433 state->displayed_credit_card_field_on_http =
434 !!(ssl.content_status &
435 content::SSLStatus::DISPLAYED_CREDIT_CARD_FIELD_ON_HTTP);
436
437 CheckSafeBrowsingStatus(entry, web_contents_, state);
438 }
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