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nsPermissionManager.cpp
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/* -*- 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/. */
#include "mozilla/Attributes.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/BasePrincipal.h"
#include "mozilla/Services.h"
#include "mozilla/Unused.h"
#include "nsPermissionManager.h"
#include "nsPermission.h"
#include "nsCRT.h"
#include "nsNetUtil.h"
#include "nsCOMArray.h"
#include "nsArrayEnumerator.h"
#include "nsTArray.h"
#include "nsReadableUtils.h"
#include "nsILineInputStream.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsDirectoryServiceDefs.h"
#include "prprf.h"
#include "mozilla/storage.h"
#include "mozilla/Attributes.h"
#include "nsXULAppAPI.h"
#include "nsIPrincipal.h"
#include "nsContentUtils.h"
#include "nsIScriptSecurityManager.h"
#include "nsIAppsService.h"
#include "mozIApplication.h"
#include "nsIEffectiveTLDService.h"
#include "nsPIDOMWindow.h"
#include "nsIDocument.h"
#include "mozilla/net/NeckoMessageUtils.h"
#include "mozilla/Preferences.h"
#include "nsReadLine.h"
#include "mozilla/Telemetry.h"
#include "nsIConsoleService.h"
#include "nsINavHistoryService.h"
#include "nsToolkitCompsCID.h"
#include "nsIObserverService.h"
static nsPermissionManager *gPermissionManager = nullptr;
using mozilla::dom::ContentParent;
using mozilla::dom::ContentChild;
using mozilla::Unused; // ha!
static bool
IsChildProcess()
{
return XRE_IsContentProcess();
}
/**
* @returns The child process object, or if we are not in the child
* process, nullptr.
*/
static ContentChild*
ChildProcess()
{
if (IsChildProcess()) {
ContentChild* cpc = ContentChild::GetSingleton();
if (!cpc)
NS_RUNTIMEABORT("Content Process is nullptr!");
return cpc;
}
return nullptr;
}
static void
LogToConsole(const nsAString& aMsg)
{
nsCOMPtr<nsIConsoleService> console(do_GetService("@mozilla.org/consoleservice;1"));
if (!console) {
NS_WARNING("Failed to log message to console.");
return;
}
nsAutoString msg(aMsg);
console->LogStringMessage(msg.get());
}
#define ENSURE_NOT_CHILD_PROCESS_(onError) \
PR_BEGIN_MACRO \
if (IsChildProcess()) { \
NS_ERROR("Cannot perform action in content process!"); \
onError \
} \
PR_END_MACRO
#define ENSURE_NOT_CHILD_PROCESS \
ENSURE_NOT_CHILD_PROCESS_({ return NS_ERROR_NOT_AVAILABLE; })
#define ENSURE_NOT_CHILD_PROCESS_NORET \
ENSURE_NOT_CHILD_PROCESS_(;)
////////////////////////////////////////////////////////////////////////////////
namespace {
nsresult
GetOriginFromPrincipal(nsIPrincipal* aPrincipal, nsACString& aOrigin)
{
nsresult rv = aPrincipal->GetOriginNoSuffix(aOrigin);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString suffix;
rv = aPrincipal->GetOriginSuffix(suffix);
NS_ENSURE_SUCCESS(rv, rv);
mozilla::PrincipalOriginAttributes attrs;
if (!attrs.PopulateFromSuffix(suffix)) {
return NS_ERROR_FAILURE;
}
// mPrivateBrowsingId must be set to false because PermissionManager is not supposed to have
// any knowledge of private browsing. Allowing it to be true changes the suffix being hashed.
attrs.mPrivateBrowsingId = 0;
// set to default to disable user context isolation for permissions
attrs.mUserContextId = nsIScriptSecurityManager::DEFAULT_USER_CONTEXT_ID;
attrs.CreateSuffix(suffix);
aOrigin.Append(suffix);
return NS_OK;
}
nsresult
GetPrincipalFromOrigin(const nsACString& aOrigin, nsIPrincipal** aPrincipal)
{
nsAutoCString originNoSuffix;
mozilla::PrincipalOriginAttributes attrs;
if (!attrs.PopulateFromOrigin(aOrigin, originNoSuffix)) {
return NS_ERROR_FAILURE;
}
// set to default to disable user context isolation for permissions
attrs.mUserContextId = nsIScriptSecurityManager::DEFAULT_USER_CONTEXT_ID;
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_NewURI(getter_AddRefs(uri), originNoSuffix);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIPrincipal> principal = mozilla::BasePrincipal::CreateCodebasePrincipal(uri, attrs);
principal.forget(aPrincipal);
return NS_OK;
}
nsresult
GetPrincipal(nsIURI* aURI, uint32_t aAppId, bool aIsInIsolatedMozBrowserElement, nsIPrincipal** aPrincipal)
{
// TODO: Bug 1165267 - Use OriginAttributes for nsCookieService
mozilla::PrincipalOriginAttributes attrs(aAppId, aIsInIsolatedMozBrowserElement);
nsCOMPtr<nsIPrincipal> principal = mozilla::BasePrincipal::CreateCodebasePrincipal(aURI, attrs);
NS_ENSURE_TRUE(principal, NS_ERROR_FAILURE);
principal.forget(aPrincipal);
return NS_OK;
}
nsresult
GetPrincipal(nsIURI* aURI, nsIPrincipal** aPrincipal)
{
mozilla::PrincipalOriginAttributes attrs;
nsCOMPtr<nsIPrincipal> principal = mozilla::BasePrincipal::CreateCodebasePrincipal(aURI, attrs);
NS_ENSURE_TRUE(principal, NS_ERROR_FAILURE);
principal.forget(aPrincipal);
return NS_OK;
}
nsCString
GetNextSubDomainForHost(const nsACString& aHost)
{
nsCOMPtr<nsIEffectiveTLDService> tldService =
do_GetService(NS_EFFECTIVETLDSERVICE_CONTRACTID);
if (!tldService) {
NS_ERROR("Should have a tld service!");
return EmptyCString();
}
nsCString subDomain;
nsresult rv = tldService->GetNextSubDomain(aHost, subDomain);
// We can fail if there is no more subdomain or if the host can't have a
// subdomain.
if (NS_FAILED(rv)) {
return EmptyCString();
}
return subDomain;
}
class ClearOriginDataObserver final : public nsIObserver {
~ClearOriginDataObserver() {}
public:
NS_DECL_ISUPPORTS
// nsIObserver implementation.
NS_IMETHOD
Observe(nsISupports* aSubject, const char* aTopic, const char16_t* aData) override
{
MOZ_ASSERT(!nsCRT::strcmp(aTopic, "clear-origin-data"));
nsCOMPtr<nsIPermissionManager> permManager = do_GetService("@mozilla.org/permissionmanager;1");
return permManager->RemovePermissionsWithAttributes(nsDependentString(aData));
}
};
NS_IMPL_ISUPPORTS(ClearOriginDataObserver, nsIObserver)
class MOZ_STACK_CLASS UpgradeHostToOriginHelper {
public:
virtual nsresult Insert(const nsACString& aOrigin, const nsAFlatCString& aType,
uint32_t aPermission, uint32_t aExpireType, int64_t aExpireTime,
int64_t aModificationTime) = 0;
};
class MOZ_STACK_CLASS UpgradeHostToOriginDBMigration final : public UpgradeHostToOriginHelper {
public:
UpgradeHostToOriginDBMigration(mozIStorageConnection* aDBConn, int64_t* aID) : mDBConn(aDBConn)
, mID(aID)
{
mDBConn->CreateStatement(NS_LITERAL_CSTRING(
"INSERT INTO moz_hosts_new "
"(id, origin, type, permission, expireType, expireTime, modificationTime) "
"VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7)"), getter_AddRefs(mStmt));
}
nsresult
Insert(const nsACString& aOrigin, const nsAFlatCString& aType,
uint32_t aPermission, uint32_t aExpireType, int64_t aExpireTime,
int64_t aModificationTime) final
{
nsresult rv = mStmt->BindInt64ByIndex(0, *mID);
NS_ENSURE_SUCCESS(rv, rv);
rv = mStmt->BindUTF8StringByIndex(1, aOrigin);
NS_ENSURE_SUCCESS(rv, rv);
rv = mStmt->BindUTF8StringByIndex(2, aType);
NS_ENSURE_SUCCESS(rv, rv);
rv = mStmt->BindInt32ByIndex(3, aPermission);
NS_ENSURE_SUCCESS(rv, rv);
rv = mStmt->BindInt32ByIndex(4, aExpireType);
NS_ENSURE_SUCCESS(rv, rv);
rv = mStmt->BindInt64ByIndex(5, aExpireTime);
NS_ENSURE_SUCCESS(rv, rv);
rv = mStmt->BindInt64ByIndex(6, aModificationTime);
NS_ENSURE_SUCCESS(rv, rv);
// Increment the working identifier, as we are about to use this one
(*mID)++;
rv = mStmt->Execute();
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
private:
nsCOMPtr<mozIStorageStatement> mStmt;
nsCOMPtr<mozIStorageConnection> mDBConn;
int64_t* mID;
};
class MOZ_STACK_CLASS UpgradeHostToOriginHostfileImport final : public UpgradeHostToOriginHelper {
public:
UpgradeHostToOriginHostfileImport(nsPermissionManager* aPm,
nsPermissionManager::DBOperationType aOperation,
int64_t aID) : mPm(aPm)
, mOperation(aOperation)
, mID(aID)
{}
nsresult
Insert(const nsACString& aOrigin, const nsAFlatCString& aType,
uint32_t aPermission, uint32_t aExpireType, int64_t aExpireTime,
int64_t aModificationTime) final
{
nsCOMPtr<nsIPrincipal> principal;
nsresult rv = GetPrincipalFromOrigin(aOrigin, getter_AddRefs(principal));
NS_ENSURE_SUCCESS(rv, rv);
return mPm->AddInternal(principal, aType, aPermission, mID,
aExpireType, aExpireTime, aModificationTime,
nsPermissionManager::eDontNotify, mOperation);
}
private:
RefPtr<nsPermissionManager> mPm;
nsPermissionManager::DBOperationType mOperation;
int64_t mID;
};
class MOZ_STACK_CLASS UpgradeIPHostToOriginDB final : public UpgradeHostToOriginHelper {
public:
UpgradeIPHostToOriginDB(mozIStorageConnection* aDBConn, int64_t* aID) : mDBConn(aDBConn)
, mID(aID)
{
mDBConn->CreateStatement(NS_LITERAL_CSTRING(
"INSERT INTO moz_perms"
"(id, origin, type, permission, expireType, expireTime, modificationTime) "
"VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7)"), getter_AddRefs(mStmt));
mDBConn->CreateStatement(NS_LITERAL_CSTRING(
"SELECT id FROM moz_perms WHERE origin = ?1 AND type = ?2"),
getter_AddRefs(mLookupStmt));
}
nsresult
Insert(const nsACString& aOrigin, const nsAFlatCString& aType,
uint32_t aPermission, uint32_t aExpireType, int64_t aExpireTime,
int64_t aModificationTime) final
{
// Every time the migration code wants to insert an origin into
// the database we need to check to see if someone has already
// created a permissions entry for that permission. If they have,
// we don't want to insert a duplicate row.
//
// We can afford to do this lookup unconditionally and not perform
// caching, as a origin type pair should only be attempted to be
// inserted once.
nsresult rv = mLookupStmt->Reset();
NS_ENSURE_SUCCESS(rv, rv);
rv = mLookupStmt->BindUTF8StringByIndex(0, aOrigin);
NS_ENSURE_SUCCESS(rv, rv);
rv = mLookupStmt->BindUTF8StringByIndex(1, aType);
NS_ENSURE_SUCCESS(rv, rv);
// Check if we already have the row in the database, if we do, then
// we don't want to be inserting it again.
bool moreStmts = false;
if (NS_FAILED(mLookupStmt->ExecuteStep(&moreStmts)) || moreStmts) {
mLookupStmt->Reset();
NS_WARNING("A permissions entry was going to be re-migrated, "
"but was already found in the permissions database.");
return NS_OK;
}
// Actually insert the statement into the database.
rv = mStmt->BindInt64ByIndex(0, *mID);
NS_ENSURE_SUCCESS(rv, rv);
rv = mStmt->BindUTF8StringByIndex(1, aOrigin);
NS_ENSURE_SUCCESS(rv, rv);
rv = mStmt->BindUTF8StringByIndex(2, aType);
NS_ENSURE_SUCCESS(rv, rv);
rv = mStmt->BindInt32ByIndex(3, aPermission);
NS_ENSURE_SUCCESS(rv, rv);
rv = mStmt->BindInt32ByIndex(4, aExpireType);
NS_ENSURE_SUCCESS(rv, rv);
rv = mStmt->BindInt64ByIndex(5, aExpireTime);
NS_ENSURE_SUCCESS(rv, rv);
rv = mStmt->BindInt64ByIndex(6, aModificationTime);
NS_ENSURE_SUCCESS(rv, rv);
// Increment the working identifier, as we are about to use this one
(*mID)++;
rv = mStmt->Execute();
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
private:
nsCOMPtr<mozIStorageStatement> mStmt;
nsCOMPtr<mozIStorageStatement> mLookupStmt;
nsCOMPtr<mozIStorageConnection> mDBConn;
int64_t* mID;
};
nsresult
UpgradeHostToOriginAndInsert(const nsACString& aHost, const nsAFlatCString& aType,
uint32_t aPermission, uint32_t aExpireType, int64_t aExpireTime,
int64_t aModificationTime, uint32_t aAppId, bool aIsInIsolatedMozBrowserElement,
UpgradeHostToOriginHelper* aHelper)
{
if (aHost.EqualsLiteral("<file>")) {
// We no longer support the magic host <file>
NS_WARNING("The magic host <file> is no longer supported. "
"It is being removed from the permissions database.");
return NS_OK;
}
// First, we check to see if the host is a valid URI. If it is, it can be imported directly
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_NewURI(getter_AddRefs(uri), aHost);
if (NS_SUCCEEDED(rv)) {
// It was previously possible to insert useless entries to your permissions database
// for URIs which have a null principal. This acts as a cleanup, getting rid of
// these useless database entries
bool nullpScheme = false;
if (NS_SUCCEEDED(uri->SchemeIs("moz-nullprincipal", &nullpScheme)) && nullpScheme) {
NS_WARNING("A moz-nullprincipal: permission is being discarded.");
return NS_OK;
}
nsCOMPtr<nsIPrincipal> principal;
rv = GetPrincipal(uri, aAppId, aIsInIsolatedMozBrowserElement, getter_AddRefs(principal));
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString origin;
rv = GetOriginFromPrincipal(principal, origin);
NS_ENSURE_SUCCESS(rv, rv);
return aHelper->Insert(origin, aType, aPermission,
aExpireType, aExpireTime, aModificationTime);
return NS_OK;
}
// The user may use this host at non-standard ports or protocols, we can use their history
// to guess what ports and protocols we want to add permissions for.
// We find every URI which they have visited with this host (or a subdomain of this host),
// and try to add it as a principal.
bool foundHistory = false;
nsCOMPtr<nsINavHistoryService> histSrv = do_GetService(NS_NAVHISTORYSERVICE_CONTRACTID);
if (histSrv) {
nsCOMPtr<nsINavHistoryQuery> histQuery;
rv = histSrv->GetNewQuery(getter_AddRefs(histQuery));
NS_ENSURE_SUCCESS(rv, rv);
// Get the eTLD+1 of the domain
nsAutoCString eTLD1;
nsCOMPtr<nsIEffectiveTLDService> tldService =
do_GetService(NS_EFFECTIVETLDSERVICE_CONTRACTID);
MOZ_ASSERT(tldService); // We should always have a tldService
if (tldService) {
rv = tldService->GetBaseDomainFromHost(aHost, 0, eTLD1);
}
if (!tldService || NS_FAILED(rv)) {
// If the lookup on the tldService for the base domain for the host failed,
// that means that we just want to directly use the host as the host name
// for the lookup.
eTLD1 = aHost;
}
// We want to only find history items for this particular eTLD+1, and subdomains
rv = histQuery->SetDomain(eTLD1);
NS_ENSURE_SUCCESS(rv, rv);
rv = histQuery->SetDomainIsHost(false);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsINavHistoryQueryOptions> histQueryOpts;
rv = histSrv->GetNewQueryOptions(getter_AddRefs(histQueryOpts));
NS_ENSURE_SUCCESS(rv, rv);
// We want to get the URIs for every item in the user's history with the given host
rv = histQueryOpts->SetResultType(nsINavHistoryQueryOptions::RESULTS_AS_URI);
NS_ENSURE_SUCCESS(rv, rv);
// We only search history, because searching both bookmarks and history
// is not supported, and history tends to be more comprehensive.
rv = histQueryOpts->SetQueryType(nsINavHistoryQueryOptions::QUERY_TYPE_HISTORY);
NS_ENSURE_SUCCESS(rv, rv);
// We include hidden URIs (such as those visited via iFrames) as they may have permissions too
rv = histQueryOpts->SetIncludeHidden(true);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsINavHistoryResult> histResult;
rv = histSrv->ExecuteQuery(histQuery, histQueryOpts, getter_AddRefs(histResult));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsINavHistoryContainerResultNode> histResultContainer;
rv = histResult->GetRoot(getter_AddRefs(histResultContainer));
NS_ENSURE_SUCCESS(rv, rv);
rv = histResultContainer->SetContainerOpen(true);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t childCount = 0;
rv = histResultContainer->GetChildCount(&childCount);
NS_ENSURE_SUCCESS(rv, rv);
nsTHashtable<nsCStringHashKey> insertedOrigins;
for (uint32_t i = 0; i < childCount; i++) {
nsCOMPtr<nsINavHistoryResultNode> child;
histResultContainer->GetChild(i, getter_AddRefs(child));
if (NS_WARN_IF(NS_FAILED(rv))) continue;
uint32_t type;
rv = child->GetType(&type);
if (NS_WARN_IF(NS_FAILED(rv)) || type != nsINavHistoryResultNode::RESULT_TYPE_URI) {
NS_WARNING("Unexpected non-RESULT_TYPE_URI node in "
"UpgradeHostToOriginAndInsert()");
continue;
}
nsAutoCString uriSpec;
rv = child->GetUri(uriSpec);
if (NS_WARN_IF(NS_FAILED(rv))) continue;
nsCOMPtr<nsIURI> uri;
rv = NS_NewURI(getter_AddRefs(uri), uriSpec);
if (NS_WARN_IF(NS_FAILED(rv))) continue;
// Use the provided host - this URI may be for a subdomain, rather than the host we care about.
rv = uri->SetHost(aHost);
if (NS_WARN_IF(NS_FAILED(rv))) continue;
// We now have a URI which we can make a nsIPrincipal out of
nsCOMPtr<nsIPrincipal> principal;
rv = GetPrincipal(uri, aAppId, aIsInIsolatedMozBrowserElement, getter_AddRefs(principal));
if (NS_WARN_IF(NS_FAILED(rv))) continue;
nsAutoCString origin;
rv = GetOriginFromPrincipal(principal, origin);
if (NS_WARN_IF(NS_FAILED(rv))) continue;
// Ensure that we don't insert the same origin repeatedly
if (insertedOrigins.Contains(origin)) {
continue;
}
foundHistory = true;
rv = aHelper->Insert(origin, aType, aPermission,
aExpireType, aExpireTime, aModificationTime);
NS_WARN_IF(NS_WARN_IF(NS_FAILED(rv)));
insertedOrigins.PutEntry(origin);
}
rv = histResultContainer->SetContainerOpen(false);
NS_ENSURE_SUCCESS(rv, rv);
}
// If we didn't find any origins for this host in the poermissions database,
// we can insert the default http:// and https:// permissions into the database.
// This has a relatively high liklihood of applying the permission to the correct
// origin.
if (!foundHistory) {
nsAutoCString hostSegment;
nsCOMPtr<nsIPrincipal> principal;
nsAutoCString origin;
// If this is an ipv6 URI, we need to surround it in '[', ']' before trying to
// parse it as a URI.
if (aHost.FindChar(':') != -1) {
hostSegment.Assign("[");
hostSegment.Append(aHost);
hostSegment.Append("]");
} else {
hostSegment.Assign(aHost);
}
// http:// URI default
rv = NS_NewURI(getter_AddRefs(uri), NS_LITERAL_CSTRING("http://") + hostSegment);
NS_ENSURE_SUCCESS(rv, rv);
rv = GetPrincipal(uri, aAppId, aIsInIsolatedMozBrowserElement, getter_AddRefs(principal));
NS_ENSURE_SUCCESS(rv, rv);
rv = GetOriginFromPrincipal(principal, origin);
NS_ENSURE_SUCCESS(rv, rv);
aHelper->Insert(origin, aType, aPermission,
aExpireType, aExpireTime, aModificationTime);
// https:// URI default
rv = NS_NewURI(getter_AddRefs(uri), NS_LITERAL_CSTRING("https://") + hostSegment);
NS_ENSURE_SUCCESS(rv, rv);
rv = GetPrincipal(uri, aAppId, aIsInIsolatedMozBrowserElement, getter_AddRefs(principal));
NS_ENSURE_SUCCESS(rv, rv);
rv = GetOriginFromPrincipal(principal, origin);
NS_ENSURE_SUCCESS(rv, rv);
aHelper->Insert(origin, aType, aPermission,
aExpireType, aExpireTime, aModificationTime);
}
return NS_OK;
}
static bool
IsExpandedPrincipal(nsIPrincipal* aPrincipal)
{
nsCOMPtr<nsIExpandedPrincipal> ep = do_QueryInterface(aPrincipal);
return !!ep;
}
} // namespace
////////////////////////////////////////////////////////////////////////////////
nsPermissionManager::PermissionKey::PermissionKey(nsIPrincipal* aPrincipal)
{
MOZ_ALWAYS_SUCCEEDS(GetOriginFromPrincipal(aPrincipal, mOrigin));
}
/**
* Simple callback used by |AsyncClose| to trigger a treatment once
* the database is closed.
*
* Note: Beware that, if you hold onto a |CloseDatabaseListener| from a
* |nsPermissionManager|, this will create a cycle.
*
* Note: Once the callback has been called this DeleteFromMozHostListener cannot
* be reused.
*/
class CloseDatabaseListener final : public mozIStorageCompletionCallback
{
~CloseDatabaseListener() {}
public:
NS_DECL_ISUPPORTS
NS_DECL_MOZISTORAGECOMPLETIONCALLBACK
/**
* @param aManager The owning manager.
* @param aRebuildOnSuccess If |true|, reinitialize the database once
* it has been closed. Otherwise, do nothing such.
*/
CloseDatabaseListener(nsPermissionManager* aManager,
bool aRebuildOnSuccess);
protected:
RefPtr<nsPermissionManager> mManager;
bool mRebuildOnSuccess;
};
NS_IMPL_ISUPPORTS(CloseDatabaseListener, mozIStorageCompletionCallback)
CloseDatabaseListener::CloseDatabaseListener(nsPermissionManager* aManager,
bool aRebuildOnSuccess)
: mManager(aManager)
, mRebuildOnSuccess(aRebuildOnSuccess)
{
}
NS_IMETHODIMP
CloseDatabaseListener::Complete(nsresult, nsISupports*)
{
// Help breaking cycles
RefPtr<nsPermissionManager> manager = mManager.forget();
if (mRebuildOnSuccess && !manager->mIsShuttingDown) {
return manager->InitDB(true);
}
return NS_OK;
}
/**
* Simple callback used by |RemoveAllInternal| to trigger closing
* the database and reinitializing it.
*
* Note: Beware that, if you hold onto a |DeleteFromMozHostListener| from a
* |nsPermissionManager|, this will create a cycle.
*
* Note: Once the callback has been called this DeleteFromMozHostListener cannot
* be reused.
*/
class DeleteFromMozHostListener final : public mozIStorageStatementCallback
{
~DeleteFromMozHostListener() {}
public:
NS_DECL_ISUPPORTS
NS_DECL_MOZISTORAGESTATEMENTCALLBACK
/**
* @param aManager The owning manager.
*/
explicit DeleteFromMozHostListener(nsPermissionManager* aManager);
protected:
RefPtr<nsPermissionManager> mManager;
};
NS_IMPL_ISUPPORTS(DeleteFromMozHostListener, mozIStorageStatementCallback)
DeleteFromMozHostListener::
DeleteFromMozHostListener(nsPermissionManager* aManager)
: mManager(aManager)
{
}
NS_IMETHODIMP DeleteFromMozHostListener::HandleResult(mozIStorageResultSet *)
{
MOZ_CRASH("Should not get any results");
}
NS_IMETHODIMP DeleteFromMozHostListener::HandleError(mozIStorageError *)
{
// Errors are handled in |HandleCompletion|
return NS_OK;
}
NS_IMETHODIMP DeleteFromMozHostListener::HandleCompletion(uint16_t aReason)
{
// Help breaking cycles
RefPtr<nsPermissionManager> manager = mManager.forget();
if (aReason == REASON_ERROR) {
manager->CloseDB(true);
}
return NS_OK;
}
/* static */ void
nsPermissionManager::ClearOriginDataObserverInit()
{
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
observerService->AddObserver(new ClearOriginDataObserver(), "clear-origin-data", /* holdsWeak= */ false);
}
////////////////////////////////////////////////////////////////////////////////
// nsPermissionManager Implementation
#define PERMISSIONS_FILE_NAME "permissions.sqlite"
#define HOSTS_SCHEMA_VERSION 9
#define HOSTPERM_FILE_NAME "hostperm.1"
// Default permissions are read from a URL - this is the preference we read
// to find that URL. If not set, don't use any default permissions.
static const char kDefaultsUrlPrefName[] = "permissions.manager.defaultsUrl";
static const char kPermissionChangeNotification[] = PERM_CHANGE_NOTIFICATION;
NS_IMPL_ISUPPORTS(nsPermissionManager, nsIPermissionManager, nsIObserver, nsISupportsWeakReference)
nsPermissionManager::nsPermissionManager()
: mMemoryOnlyDB(false)
, mLargestID(0)
, mIsShuttingDown(false)
{
}
nsPermissionManager::~nsPermissionManager()
{
RemoveAllFromMemory();
gPermissionManager = nullptr;
}
// static
nsIPermissionManager*
nsPermissionManager::GetXPCOMSingleton()
{
if (gPermissionManager) {
NS_ADDREF(gPermissionManager);
return gPermissionManager;
}
// Create a new singleton nsPermissionManager.
// We AddRef only once since XPCOM has rules about the ordering of module
// teardowns - by the time our module destructor is called, it's too late to
// Release our members, since GC cycles have already been completed and
// would result in serious leaks.
// See bug 209571.
gPermissionManager = new nsPermissionManager();
if (gPermissionManager) {
NS_ADDREF(gPermissionManager);
if (NS_FAILED(gPermissionManager->Init())) {
NS_RELEASE(gPermissionManager);
}
}
return gPermissionManager;
}
nsresult
nsPermissionManager::Init()
{
// If the 'permissions.memory_only' pref is set to true, then don't write any
// permission settings to disk, but keep them in a memory-only database.
mMemoryOnlyDB = mozilla::Preferences::GetBool("permissions.memory_only", false);
if (IsChildProcess()) {
// Stop here; we don't need the DB in the child process
return FetchPermissions();
}
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->AddObserver(this, "profile-before-change", true);
observerService->AddObserver(this, "profile-do-change", true);
}
// ignore failure here, since it's non-fatal (we can run fine without
// persistent storage - e.g. if there's no profile).
// XXX should we tell the user about this?
InitDB(false);
return NS_OK;
}
NS_IMETHODIMP
nsPermissionManager::RefreshPermission() {
NS_ENSURE_TRUE(IsChildProcess(), NS_ERROR_FAILURE);
nsresult rv = RemoveAllFromMemory();
NS_ENSURE_SUCCESS(rv, rv);
rv = FetchPermissions();
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult
nsPermissionManager::OpenDatabase(nsIFile* aPermissionsFile)
{
nsresult rv;
nsCOMPtr<mozIStorageService> storage = do_GetService(MOZ_STORAGE_SERVICE_CONTRACTID);
if (!storage) {
return NS_ERROR_UNEXPECTED;
}
// cache a connection to the hosts database
if (mMemoryOnlyDB) {
rv = storage->OpenSpecialDatabase("memory", getter_AddRefs(mDBConn));
} else {
rv = storage->OpenDatabase(aPermissionsFile, getter_AddRefs(mDBConn));
}
return rv;
}
nsresult
nsPermissionManager::InitDB(bool aRemoveFile)
{
nsCOMPtr<nsIFile> permissionsFile;
nsresult rv = NS_GetSpecialDirectory(NS_APP_PERMISSION_PARENT_DIR, getter_AddRefs(permissionsFile));
if (NS_FAILED(rv)) {
rv = NS_GetSpecialDirectory(NS_APP_USER_PROFILE_50_DIR, getter_AddRefs(permissionsFile));
}
NS_ENSURE_SUCCESS(rv, NS_ERROR_UNEXPECTED);
rv = permissionsFile->AppendNative(NS_LITERAL_CSTRING(PERMISSIONS_FILE_NAME));
NS_ENSURE_SUCCESS(rv, rv);
if (aRemoveFile) {
bool exists = false;
rv = permissionsFile->Exists(&exists);
NS_ENSURE_SUCCESS(rv, rv);
if (exists) {
rv = permissionsFile->Remove(false);
NS_ENSURE_SUCCESS(rv, rv);
}
}
rv = OpenDatabase(permissionsFile);
if (rv == NS_ERROR_FILE_CORRUPTED) {
LogToConsole(NS_LITERAL_STRING("permissions.sqlite is corrupted! Try again!"));
// Add telemetry probe
mozilla::Telemetry::Accumulate(mozilla::Telemetry::PERMISSIONS_SQL_CORRUPTED, 1);
// delete corrupted permissions.sqlite and try again
rv = permissionsFile->Remove(false);
NS_ENSURE_SUCCESS(rv, rv);
LogToConsole(NS_LITERAL_STRING("Corrupted permissions.sqlite has been removed."));
rv = OpenDatabase(permissionsFile);
NS_ENSURE_SUCCESS(rv, rv);
LogToConsole(NS_LITERAL_STRING("OpenDatabase to permissions.sqlite is successful!"));
} else if (NS_FAILED(rv)) {
return rv;
}
bool ready;
mDBConn->GetConnectionReady(&ready);
if (!ready) {
LogToConsole(NS_LITERAL_STRING("Fail to get connection to permissions.sqlite! Try again!"));
// delete and try again
rv = permissionsFile->Remove(false);
NS_ENSURE_SUCCESS(rv, rv);
LogToConsole(NS_LITERAL_STRING("Defective permissions.sqlite has been removed."));
// Add telemetry probe
mozilla::Telemetry::Accumulate(mozilla::Telemetry::DEFECTIVE_PERMISSIONS_SQL_REMOVED, 1);
rv = OpenDatabase(permissionsFile);
NS_ENSURE_SUCCESS(rv, rv);
LogToConsole(NS_LITERAL_STRING("OpenDatabase to permissions.sqlite is successful!"));
mDBConn->GetConnectionReady(&ready);
if (!ready)
return NS_ERROR_UNEXPECTED;
}
bool tableExists = false;
mDBConn->TableExists(NS_LITERAL_CSTRING("moz_perms"), &tableExists);
if (!tableExists) {
mDBConn->TableExists(NS_LITERAL_CSTRING("moz_hosts"), &tableExists);
}
if (!tableExists) {
rv = CreateTable();
NS_ENSURE_SUCCESS(rv, rv);
} else {
// table already exists; check the schema version before reading
int32_t dbSchemaVersion;
rv = mDBConn->GetSchemaVersion(&dbSchemaVersion);
NS_ENSURE_SUCCESS(rv, rv);
switch (dbSchemaVersion) {
// upgrading.
// every time you increment the database schema, you need to implement
// the upgrading code from the previous version to the new one.
// fall through to current version
case 1:
{
// previous non-expiry version of database. Upgrade it by adding the
// expiration columns
rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
"ALTER TABLE moz_hosts ADD expireType INTEGER"));
NS_ENSURE_SUCCESS(rv, rv);
rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
"ALTER TABLE moz_hosts ADD expireTime INTEGER"));
NS_ENSURE_SUCCESS(rv, rv);
}
// fall through to the next upgrade
MOZ_FALLTHROUGH;
// TODO: we want to make default version as version 2 in order to fix bug 784875.
case 0:
case 2:
{
// Add appId/isInBrowserElement fields.
rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
"ALTER TABLE moz_hosts ADD appId INTEGER"));
NS_ENSURE_SUCCESS(rv, rv);
rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
"ALTER TABLE moz_hosts ADD isInBrowserElement INTEGER"));
NS_ENSURE_SUCCESS(rv, rv);
rv = mDBConn->SetSchemaVersion(3);
NS_ENSURE_SUCCESS(rv, rv);
}
// fall through to the next upgrade
MOZ_FALLTHROUGH;
// Version 3->4 is the creation of the modificationTime field.
case 3:
{
rv = mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
"ALTER TABLE moz_hosts ADD modificationTime INTEGER"));
NS_ENSURE_SUCCESS(rv, rv);
// We leave the modificationTime at zero for all existing records; using
// now() would mean, eg, that doing "remove all from the last hour"
// within the first hour after migration would remove all permissions.
rv = mDBConn->SetSchemaVersion(4);
NS_ENSURE_SUCCESS(rv, rv);
}
// fall through to the next upgrade
MOZ_FALLTHROUGH;
// In version 5, host appId, and isInBrowserElement were merged into a
// single origin entry
//
// In version 6, the tables were renamed for backwards compatability reasons
// with version 4 and earlier.
//
// In version 7, a bug in the migration used for version 4->5 was discovered
// which could have triggered data-loss. Because of that, all users with a
// version 4, 5, or 6 database will be re-migrated from the backup database.
// (bug 1186034). This migration bug is not present after bug 1185340, and the
// re-migration ensures that all users have the fix.
case 5:
// This branch could also be reached via dbSchemaVersion == 3, in which case
// we want to fall through to the dbSchemaVersion == 4 case.
// The easiest way to do that is to perform this extra check here to make
// sure that we didn't get here via a fallthrough from v3
if (dbSchemaVersion == 5) {
// In version 5, the backup database is named moz_hosts_v4. We perform