| // Copyright 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 "chrome/browser/extensions/scripting_permissions_modifier.h" |
| |
| #include "chrome/browser/extensions/extension_util.h" |
| #include "chrome/browser/extensions/permissions_updater.h" |
| #include "extensions/browser/extension_prefs.h" |
| #include "extensions/browser/extension_registry.h" |
| #include "extensions/common/extension.h" |
| #include "extensions/common/feature_switch.h" |
| #include "extensions/common/manifest_handlers/permissions_parser.h" |
| #include "extensions/common/permissions/permission_set.h" |
| #include "extensions/common/permissions/permissions_data.h" |
| #include "extensions/common/user_script.h" |
| |
| namespace extensions { |
| |
| namespace { |
| |
| URLPatternSet FilterImpliedAllHostsPatterns(const URLPatternSet& patterns) { |
| URLPatternSet result; |
| for (const URLPattern& pattern : patterns) { |
| if (pattern.ImpliesAllHosts()) |
| result.AddPattern(pattern); |
| } |
| return result; |
| } |
| |
| } // namespace |
| |
| ScriptingPermissionsModifier::ScriptingPermissionsModifier( |
| content::BrowserContext* browser_context, |
| const scoped_refptr<const Extension>& extension) |
| : browser_context_(browser_context), extension_(extension) {} |
| |
| ScriptingPermissionsModifier::~ScriptingPermissionsModifier() {} |
| |
| bool ScriptingPermissionsModifier::CanAffectExtension( |
| const PermissionSet& permissions) const { |
| // An extension may require user action to execute scripts iff the extension |
| // shows up in chrome:extensions (so the user can grant withheld permissions), |
| // is not part of chrome or corporate policy, not on the scripting whitelist, |
| // and requires enough permissions that we should withhold them. |
| return extension_->ShouldDisplayInExtensionSettings() && |
| !Manifest::IsPolicyLocation(extension_->location()) && |
| !Manifest::IsComponentLocation(extension_->location()) && |
| !PermissionsData::CanExecuteScriptEverywhere(extension_.get()) && |
| permissions.ShouldWarnAllHosts(); |
| } |
| |
| bool ScriptingPermissionsModifier::HasAffectedExtension() const { |
| return extension_->permissions_data()->HasWithheldImpliedAllHosts() || |
| util::HasSetAllowedScriptingOnAllUrls(extension_->id(), |
| browser_context_); |
| } |
| |
| void ScriptingPermissionsModifier::GrantHostPermission(const GURL& url) const { |
| GURL origin = url.GetOrigin(); |
| URLPatternSet new_explicit_hosts; |
| URLPatternSet new_scriptable_hosts; |
| |
| const PermissionSet& withheld_permissions = |
| extension_->permissions_data()->withheld_permissions(); |
| if (withheld_permissions.explicit_hosts().MatchesURL(url)) { |
| new_explicit_hosts.AddOrigin(UserScript::ValidUserScriptSchemes(), origin); |
| } |
| if (withheld_permissions.scriptable_hosts().MatchesURL(url)) { |
| new_scriptable_hosts.AddOrigin(UserScript::ValidUserScriptSchemes(), |
| origin); |
| } |
| |
| PermissionsUpdater(browser_context_) |
| .AddPermissions(extension_.get(), |
| PermissionSet(APIPermissionSet(), ManifestPermissionSet(), |
| new_explicit_hosts, new_scriptable_hosts)); |
| } |
| |
| bool ScriptingPermissionsModifier::HasGrantedHostPermission( |
| const GURL& url) const { |
| GURL origin = url.GetOrigin(); |
| const PermissionSet& required_permissions = |
| PermissionsParser::GetRequiredPermissions(extension_.get()); |
| if (!extension_->permissions_data() |
| ->active_permissions() |
| .effective_hosts() |
| .MatchesURL(origin)) |
| return false; |
| std::unique_ptr<const PermissionSet> granted_permissions; |
| std::unique_ptr<const PermissionSet> withheld_permissions; |
| WithholdPermissions(required_permissions, &granted_permissions, |
| &withheld_permissions, true); |
| if (!granted_permissions->effective_hosts().MatchesURL(origin) && |
| withheld_permissions->effective_hosts().MatchesURL(origin)) |
| return true; |
| |
| return false; |
| } |
| |
| void ScriptingPermissionsModifier::RemoveGrantedHostPermission( |
| const GURL& url) const { |
| DCHECK(HasGrantedHostPermission(url)); |
| |
| GURL origin = url.GetOrigin(); |
| URLPatternSet explicit_hosts; |
| URLPatternSet scriptable_hosts; |
| const PermissionSet& active_permissions = |
| extension_->permissions_data()->active_permissions(); |
| if (active_permissions.explicit_hosts().MatchesURL(url)) |
| explicit_hosts.AddOrigin(UserScript::ValidUserScriptSchemes(), origin); |
| if (active_permissions.scriptable_hosts().MatchesURL(url)) |
| scriptable_hosts.AddOrigin(UserScript::ValidUserScriptSchemes(), origin); |
| |
| PermissionsUpdater(browser_context_) |
| .RemovePermissions( |
| extension_.get(), |
| PermissionSet(APIPermissionSet(), ManifestPermissionSet(), |
| explicit_hosts, scriptable_hosts), |
| PermissionsUpdater::REMOVE_HARD); |
| } |
| |
| void ScriptingPermissionsModifier::WithholdPermissions( |
| const PermissionSet& permissions, |
| std::unique_ptr<const PermissionSet>* granted_permissions_out, |
| std::unique_ptr<const PermissionSet>* withheld_permissions_out, |
| bool use_initial_state) const { |
| bool should_withhold = false; |
| if (CanAffectExtension(permissions)) { |
| if (use_initial_state) { |
| // If the user ever set the extension's "all-urls" preference, then the |
| // initial state was withheld. This is important, since the all-urls |
| // permission should be shown as revokable. Otherwise, default to whatever |
| // the system setting is. |
| should_withhold = |
| util::HasSetAllowedScriptingOnAllUrls(extension_->id(), |
| browser_context_) || |
| !util::DefaultAllowedScriptingOnAllUrls(); |
| } else { |
| should_withhold = |
| !util::AllowedScriptingOnAllUrls(extension_->id(), browser_context_); |
| } |
| } |
| |
| if (!should_withhold) { |
| *granted_permissions_out = permissions.Clone(); |
| withheld_permissions_out->reset(new PermissionSet()); |
| return; |
| } |
| |
| auto segregate_url_permissions = [](const URLPatternSet& patterns, |
| URLPatternSet* granted, |
| URLPatternSet* withheld) { |
| for (const URLPattern& pattern : patterns) { |
| if (pattern.ImpliesAllHosts()) |
| withheld->AddPattern(pattern); |
| else |
| granted->AddPattern(pattern); |
| } |
| }; |
| |
| URLPatternSet granted_explicit_hosts; |
| URLPatternSet withheld_explicit_hosts; |
| URLPatternSet granted_scriptable_hosts; |
| URLPatternSet withheld_scriptable_hosts; |
| segregate_url_permissions(permissions.explicit_hosts(), |
| &granted_explicit_hosts, &withheld_explicit_hosts); |
| segregate_url_permissions(permissions.scriptable_hosts(), |
| &granted_scriptable_hosts, |
| &withheld_scriptable_hosts); |
| |
| granted_permissions_out->reset( |
| new PermissionSet(permissions.apis(), permissions.manifest_permissions(), |
| granted_explicit_hosts, granted_scriptable_hosts)); |
| withheld_permissions_out->reset( |
| new PermissionSet(APIPermissionSet(), ManifestPermissionSet(), |
| withheld_explicit_hosts, withheld_scriptable_hosts)); |
| } |
| |
| void ScriptingPermissionsModifier::GrantWithheldImpliedAllHosts() const { |
| const PermissionSet& withheld = |
| extension_->permissions_data()->withheld_permissions(); |
| |
| PermissionSet permissions( |
| APIPermissionSet(), ManifestPermissionSet(), |
| FilterImpliedAllHostsPatterns(withheld.explicit_hosts()), |
| FilterImpliedAllHostsPatterns(withheld.scriptable_hosts())); |
| PermissionsUpdater(browser_context_) |
| .AddPermissions(extension_.get(), permissions); |
| } |
| |
| void ScriptingPermissionsModifier::WithholdImpliedAllHosts() const { |
| const PermissionSet& active = |
| extension_->permissions_data()->active_permissions(); |
| PermissionSet permissions( |
| APIPermissionSet(), ManifestPermissionSet(), |
| FilterImpliedAllHostsPatterns(active.explicit_hosts()), |
| FilterImpliedAllHostsPatterns(active.scriptable_hosts())); |
| PermissionsUpdater(browser_context_) |
| .RemovePermissions(extension_.get(), permissions, |
| PermissionsUpdater::REMOVE_HARD); |
| } |
| |
| } // namespace extensions |