Index: chrome/browser/ssl/chrome_ssl_host_state_decisions.cc |
diff --git a/chrome/browser/ssl/chrome_ssl_host_state_decisions.cc b/chrome/browser/ssl/chrome_ssl_host_state_decisions.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..c0209e20aa363e93b546f3b419182091f1d1a561 |
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+++ b/chrome/browser/ssl/chrome_ssl_host_state_decisions.cc |
@@ -0,0 +1,289 @@ |
+// Copyright (c) 2014 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 "chrome/browser/ssl/chrome_ssl_host_state_decisions.h" |
+ |
+#include "base/base64.h" |
+#include "base/command_line.h" |
+#include "base/logging.h" |
+#include "base/strings/string_number_conversions.h" |
+#include "base/time/default_clock.h" |
+#include "base/time/time.h" |
+#include "chrome/browser/content_settings/host_content_settings_map.h" |
+#include "chrome/browser/profiles/profile.h" |
+#include "chrome/common/chrome_switches.h" |
+#include "chrome/common/content_settings_types.h" |
+#include "url/gurl.h" |
+ |
+namespace { |
+ |
+// This is a helper function that returns the length of time before a |
+// certificate decision expires based on the command line flags. Returns a value |
+// in seconds, where a value of 0 specifically indicates that decisions should |
+// not be remembered after the current session has ended (but should be |
+// remembered indefinitely as long as the session does not end), which is the |
+// "old" style of certificate decision memory. |
felt
2014/07/07 22:26:39
Might you want to use -1 instead of 0 for the "def
jww
2014/07/08 17:35:41
I'm not sure I understand. The number is in second
felt
2014/07/08 17:52:49
I agree, 0 seconds means "no memory at all." But h
jww
2014/07/08 23:49:01
Fair enough. I've changed this to your suggestion.
|
+int64 GetExpirationDelta() { |
+ if (!CommandLine::ForCurrentProcess()->HasSwitch( |
+ switches::kRememberCertErrorDecisions)) |
+ return 0; |
+ |
+ std::string switch_value = |
+ CommandLine::ForCurrentProcess()->GetSwitchValueASCII( |
+ switches::kRememberCertErrorDecisions); |
+ // If the expiration is set to 0, that means cert proceed decisions should |
+ // never expire, until a restart of the profile. |
+ int64 expiration_delta; |
+ if (!base::StringToInt64(switch_value, &expiration_delta)) { |
felt
2014/07/07 22:26:39
should this be a DCHECK?
jww
2014/07/08 17:35:41
I don't think so. A user can manually specify a co
|
+ LOG(ERROR) << "Failed to parse the certificate error decision " |
+ << "memory length: " << switch_value; |
+ } |
+ |
+ return expiration_delta; |
+} |
+ |
+const char kSSLCertDecisionCertErrorMapKey[] = "cert_exceptions_map"; |
+const char kSSLCertDecisionExpirationTimeKey[] = "decision_expiration_time"; |
+const char kSSLCertDecisionVersionKey[] = "version"; |
+const int kDefaultSSLCertDecisionVersion = 1; |
+ |
+std::string GetKey(net::X509Certificate* cert, net::CertStatus error) { |
+ net::SHA1HashValue fingerprint = cert->fingerprint(); |
+ std::string base64_fingerprint; |
+ base::Base64Encode( |
+ base::StringPiece(reinterpret_cast<const char*>(fingerprint.data), |
+ sizeof(fingerprint.data)), |
+ &base64_fingerprint); |
+ return base::UintToString(error) + base64_fingerprint; |
+} |
+ |
+} // namespace |
+ |
+// This helper function gets the dictionary of certificate fingerprints to |
+// errors of certificates that have been accepted by the user from the content |
+// dictionary that has been passed in. The returned pointer is owned by the the |
+// argument dict that is passed in. |
+// |
+// If create_entries is set to |false|, GetValidCertDecisionsDict will return |
+// NULL if there is anything invalid about the setting, such as an invalid |
+// version or invalid value types (in addition to there not be any values in the |
+// dictionary). If create_entries is set to |true|, if no dictionary is found or |
+// the decisions are expired, a new dictionary will be created |
felt
2014/07/07 22:26:39
why do you need to support both cases for |create_
jww
2014/07/08 17:35:41
There are two uses of GetValidCertDecisionsDict. T
|
+base::DictionaryValue* ChromeSSLHostStateDecisions::GetValidCertDecisionsDict( |
+ base::DictionaryValue* dict, |
+ bool create_entries) { |
+ // Extract the version of the certificate decision structure from the content |
+ // setting. |
+ int version; |
+ bool success = dict->GetInteger(kSSLCertDecisionVersionKey, &version); |
+ if (!success) { |
+ if (!create_entries) |
+ return NULL; |
+ |
+ dict->SetInteger(kSSLCertDecisionVersionKey, |
+ kDefaultSSLCertDecisionVersion); |
+ version = kDefaultSSLCertDecisionVersion; |
+ } |
+ |
+ // If the version is somehow a newer version than Chrome can handle, there's |
+ // really nothing to do other than fail silently and pretend it doesn't exist |
+ // (or is malformed). |
+ if (version > kDefaultSSLCertDecisionVersion) |
+ return NULL; |
+ |
+ // Extract the certificate decision's expiration time from the content |
+ // setting. If there is no expiration time, that means it should never expire |
+ // and it should resest only at session restart, so skip all of the expiration |
+ // checks. |
+ bool expired = false; |
+ double decision_expiration_dbl; |
+ base::Time now = clock_->Now(); |
+ base::Time decision_expiration; |
+ if (dict->HasKey(kSSLCertDecisionExpirationTimeKey)) { |
+ success = dict->GetDouble(kSSLCertDecisionExpirationTimeKey, |
+ &decision_expiration_dbl); |
+ decision_expiration = base::Time::FromDoubleT(decision_expiration_dbl); |
+ } |
+ |
+ // Check if the user certificate decision has expired. If it has expired, and |
+ // create_entries is |false|, treat the entry as if it doesn't exist and |
+ // return |NULL|. If it has expired, and create_entries is |true|, set the |
+ // entry's expiration date to the current time plus the expiration time delta. |
+ // Also, set expired to |true| which will force the create of a new dictionary |
+ // in the dictionary extraction pass. None of this should be done if |
+ // expiration happens on session end (i.e. the expiration delta is 0). |
+ if (defaultSSLCertDecisionExpirationDelta_.InSeconds() > 0 && |
+ decision_expiration < now) { |
+ if (!create_entries) |
+ return NULL; |
+ |
+ expired = true; |
+ |
+ // If defaultSSLCertDecisionExpirationDelta_ is 0, that means that decisions |
+ // should never expire. Thus, in that case, no key should be set. |
+ if (defaultSSLCertDecisionExpirationDelta_.InSeconds() != 0) { |
+ base::Time expiration_time = now + defaultSSLCertDecisionExpirationDelta_; |
+ dict->SetDouble(kSSLCertDecisionExpirationTimeKey, |
+ expiration_time.ToDoubleT()); |
+ } |
+ } |
+ |
+ // Extract the map of certificate fingerprints to errors from the setting. |
+ base::DictionaryValue* cert_error_dict; // Owned by dict |
+ if (expired || |
+ !dict->GetDictionary(kSSLCertDecisionCertErrorMapKey, &cert_error_dict)) { |
+ if (!create_entries) |
+ return NULL; |
+ |
+ cert_error_dict = new base::DictionaryValue(); |
+ // dict takes ownership of cert_error_dict |
+ dict->Set(kSSLCertDecisionCertErrorMapKey, cert_error_dict); |
+ } |
+ |
+ return cert_error_dict; |
+} |
+ |
+// If defaultSSLCertDecisionExpirationDelta_ is 0, that means that all invalid |
+// certificate proceed decisions should be forgotten when the session ends. At |
+// attempt is made in the destructor to remove the entries, but in the case that |
+// things didn't shut down cleanly, on start, Clear is called to guarantee a |
+// clean state. |
+ChromeSSLHostStateDecisions::ChromeSSLHostStateDecisions(Profile* profile) |
+ : clock_(new base::DefaultClock()), |
+ defaultSSLCertDecisionExpirationDelta_( |
+ base::TimeDelta::FromSeconds(GetExpirationDelta())), |
+ profile_(profile) { |
+ if (defaultSSLCertDecisionExpirationDelta_.InSeconds() == 0) |
+ Clear(); |
+} |
+ |
+ChromeSSLHostStateDecisions::~ChromeSSLHostStateDecisions() { |
+ if (defaultSSLCertDecisionExpirationDelta_.InSeconds() == 0) |
+ Clear(); |
+} |
+ |
+void ChromeSSLHostStateDecisions::DenyCert(const GURL& url, |
+ net::X509Certificate* cert, |
+ net::CertStatus error) { |
+ ChangeCertPolicy(url, cert, error, net::CertPolicy::DENIED); |
+} |
+ |
+void ChromeSSLHostStateDecisions::AllowCert(const GURL& url, |
+ net::X509Certificate* cert, |
+ net::CertStatus error) { |
+ ChangeCertPolicy(url, cert, error, net::CertPolicy::ALLOWED); |
+} |
+ |
+void ChromeSSLHostStateDecisions::Clear() { |
+ profile_->GetHostContentSettingsMap()->ClearSettingsForOneType( |
+ CONTENT_SETTINGS_TYPE_SSL_CERT_DECISIONS); |
+} |
+ |
+net::CertPolicy::Judgment ChromeSSLHostStateDecisions::QueryPolicy( |
+ const GURL& url, |
+ net::X509Certificate* cert, |
+ net::CertStatus error) { |
+ HostContentSettingsMap* map = profile_->GetHostContentSettingsMap(); |
+ scoped_ptr<base::Value> value(map->GetWebsiteSetting( |
+ url, url, CONTENT_SETTINGS_TYPE_SSL_CERT_DECISIONS, "", NULL)); |
+ |
+ DCHECK(value.get()); |
+ |
+ if (!value->IsType(base::Value::TYPE_DICTIONARY)) |
+ return net::CertPolicy::UNKNOWN; |
+ |
+ base::DictionaryValue* dict; // Owned by value |
+ int policy_decision; // Owned by dict |
+ bool success = value->GetAsDictionary(&dict); |
+ DCHECK(success); |
+ |
+ // First, check that the version of the dictionary of decisions is a version |
+ // that is known. Otherwise, fail. |
+ base::DictionaryValue* cert_error_dict; // Owned by value |
+ cert_error_dict = GetValidCertDecisionsDict(dict, false); |
+ if (!cert_error_dict) |
+ return net::CertPolicy::UNKNOWN; |
+ |
+ success = cert_error_dict->GetIntegerWithoutPathExpansion(GetKey(cert, error), |
+ &policy_decision); |
+ |
+ if (!success) |
+ return net::CertPolicy::Judgment::UNKNOWN; |
+ |
+ return static_cast<net::CertPolicy::Judgment>(policy_decision); |
+} |
+ |
+void ChromeSSLHostStateDecisions::RevokeAllowAndDenyPreferences( |
+ const GURL& url) { |
+ const ContentSettingsPattern pattern = |
+ ContentSettingsPattern::FromURLNoWildcard(url); |
+ HostContentSettingsMap* map = profile_->GetHostContentSettingsMap(); |
+ |
+ map->SetWebsiteSetting( |
+ pattern, pattern, CONTENT_SETTINGS_TYPE_SSL_CERT_DECISIONS, "", NULL); |
+} |
+ |
+bool ChromeSSLHostStateDecisions::HasAllowedOrDeniedCert(const GURL& url) { |
+ const ContentSettingsPattern pattern = |
+ ContentSettingsPattern::FromURLNoWildcard(url); |
+ HostContentSettingsMap* map = profile_->GetHostContentSettingsMap(); |
+ |
+ scoped_ptr<base::Value> value(map->GetWebsiteSetting( |
+ url, url, CONTENT_SETTINGS_TYPE_SSL_CERT_DECISIONS, "", NULL)); |
+ |
+ if (!value->IsType(base::Value::TYPE_DICTIONARY)) |
+ return false; |
+ |
+ base::DictionaryValue* dict; // Owned by value |
+ bool success = value->GetAsDictionary(&dict); |
+ DCHECK(success); |
+ |
+ for (base::DictionaryValue::Iterator it(*dict); !it.IsAtEnd(); it.Advance()) { |
+ int policy_decision; // Owned by dict |
+ success = it.value().GetAsInteger(&policy_decision); |
+ if (success && (static_cast<net::CertPolicy::Judgment>(policy_decision) != |
+ net::CertPolicy::UNKNOWN)) |
+ return true; |
+ } |
+ |
+ return false; |
+} |
+ |
+void ChromeSSLHostStateDecisions::ChangeCertPolicy( |
+ const GURL& url, |
+ net::X509Certificate* cert, |
+ net::CertStatus error, |
+ net::CertPolicy::Judgment judgment) { |
+ const ContentSettingsPattern pattern = |
+ ContentSettingsPattern::FromURLNoWildcard(url); |
+ HostContentSettingsMap* map = profile_->GetHostContentSettingsMap(); |
+ scoped_ptr<base::Value> value(map->GetWebsiteSetting( |
+ url, url, CONTENT_SETTINGS_TYPE_SSL_CERT_DECISIONS, "", NULL)); |
+ |
+ if (!value->IsType(base::Value::TYPE_DICTIONARY)) |
+ value.reset(new base::DictionaryValue()); |
+ |
+ base::DictionaryValue* dict; |
+ bool success = value->GetAsDictionary(&dict); |
+ DCHECK(success); |
+ |
+ base::DictionaryValue* cert_dict = GetValidCertDecisionsDict(dict, true); |
+ // If a a valid certificate dictionary cannot be extracted from the content |
+ // setting, that means it's in an unknown format. Unfortunately, there's |
+ // nothing to be done in that case, so a silent fail is the only option. |
+ if (!cert_dict) |
+ return; |
+ |
+ dict->SetIntegerWithoutPathExpansion(kSSLCertDecisionVersionKey, |
+ kDefaultSSLCertDecisionVersion); |
+ cert_dict->SetIntegerWithoutPathExpansion(GetKey(cert, error), judgment); |
+ |
+ // The map takes ownership of the value, so it is released in the call to |
+ // SetWebsiteSetting. |
+ map->SetWebsiteSetting(pattern, |
+ pattern, |
+ CONTENT_SETTINGS_TYPE_SSL_CERT_DECISIONS, |
+ "", |
+ value.release()); |
+} |