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|
// Copyright (c) 2009 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.
#import "chrome/browser/cocoa/keystone_glue.h"
#include <sys/param.h>
#include <sys/mount.h>
#include <vector>
#import "app/l10n_util_mac.h"
#include "base/logging.h"
#include "base/mac_util.h"
#import "base/worker_pool_mac.h"
#include "chrome/browser/cocoa/authorization_util.h"
#include "chrome/common/chrome_constants.h"
#include "grit/chromium_strings.h"
#include "grit/generated_resources.h"
namespace {
// Provide declarations of the Keystone registration bits needed here. From
// KSRegistration.h.
typedef enum {
kKSPathExistenceChecker,
} KSExistenceCheckerType;
typedef enum {
kKSRegistrationUserTicket,
kKSRegistrationSystemTicket,
kKSRegistrationDontKnowWhatKindOfTicket,
} KSRegistrationTicketType;
NSString *KSRegistrationDidCompleteNotification =
@"KSRegistrationDidCompleteNotification";
NSString *KSRegistrationPromotionDidCompleteNotification =
@"KSRegistrationPromotionDidCompleteNotification";
NSString *KSRegistrationCheckForUpdateNotification =
@"KSRegistrationCheckForUpdateNotification";
NSString *KSRegistrationStatusKey = @"Status";
NSString *KSRegistrationVersionKey = @"Version";
NSString *KSRegistrationUpdateCheckErrorKey = @"Error";
NSString *KSRegistrationStartUpdateNotification =
@"KSRegistrationStartUpdateNotification";
NSString *KSUpdateCheckSuccessfulKey = @"CheckSuccessful";
NSString *KSUpdateCheckSuccessfullyInstalledKey = @"SuccessfullyInstalled";
NSString *KSRegistrationRemoveExistingTag = @"";
#define KSRegistrationPreserveExistingTag nil
} // namespace
@interface KSRegistration : NSObject
+ (id)registrationWithProductID:(NSString*)productID;
- (BOOL)registerWithVersion:(NSString*)version
existenceCheckerType:(KSExistenceCheckerType)xctype
existenceCheckerString:(NSString*)xc
serverURLString:(NSString*)serverURLString
preserveTTToken:(BOOL)preserveToken
tag:(NSString*)tag;
- (BOOL)promoteWithVersion:(NSString*)version
existenceCheckerType:(KSExistenceCheckerType)xctype
existenceCheckerString:(NSString*)xc
serverURLString:(NSString*)serverURLString
preserveTTToken:(BOOL)preserveToken
tag:(NSString*)tag
authorization:(AuthorizationRef)authorization;
- (void)setActive;
- (void)checkForUpdate;
- (void)startUpdate;
- (KSRegistrationTicketType)ticketType;
@end // @interface KSRegistration
@interface KeystoneGlue(Private)
// Called when Keystone registration completes.
- (void)registrationComplete:(NSNotification*)notification;
// Called periodically to announce activity by pinging the Keystone server.
- (void)markActive:(NSTimer*)timer;
// Called when an update check or update installation is complete. Posts the
// kAutoupdateStatusNotification notification to the default notification
// center.
- (void)updateStatus:(AutoupdateStatus)status version:(NSString*)version;
// These three methods are used to determine the version of the application
// currently installed on disk, compare that to the currently-running version,
// decide whether any updates have been installed, and call
// -updateStatus:version:.
//
// In order to check the version on disk, the installed application's
// Info.plist dictionary must be read; in order to see changes as updates are
// applied, the dictionary must be read each time, bypassing any caches such
// as the one that NSBundle might be maintaining. Reading files can be a
// blocking operation, and blocking operations are to be avoided on the main
// thread. I'm not quite sure what jank means, but I bet that a blocked main
// thread would cause some of it.
//
// -determineUpdateStatusAsync is called on the main thread to initiate the
// operation. It performs initial set-up work that must be done on the main
// thread and arranges for -determineUpdateStatus to be called on a work queue
// thread managed by NSOperationQueue.
// -determineUpdateStatus then reads the Info.plist, gets the version from the
// CFBundleShortVersionString key, and performs
// -determineUpdateStatusForVersion: on the main thread.
// -determineUpdateStatusForVersion: does the actual comparison of the version
// on disk with the running version and calls -updateStatus:version: with the
// results of its analysis.
- (void)determineUpdateStatusAsync;
- (void)determineUpdateStatus;
- (void)determineUpdateStatusForVersion:(NSString*)version;
// Returns YES if registration_ is definitely on a user ticket. If definitely
// on a system ticket, or uncertain of ticket type (due to an older version
// of Keystone being used), returns NO.
- (BOOL)isUserTicket;
// Called when ticket promotion completes.
- (void)promotionComplete:(NSNotification*)notification;
// Changes the application's ownership and permissions so that all files are
// owned by root:wheel and all files and directories are writable only by
// root, but readable and executable as needed by everyone.
// -changePermissionsForPromotionAsync is called on the main thread by
// -promotionComplete. That routine calls
// -changePermissionsForPromotionWithTool: on a work queue thread. When done,
// -changePermissionsForPromotionComplete is called on the main thread.
- (void)changePermissionsForPromotionAsync;
- (void)changePermissionsForPromotionWithTool:(NSString*)toolPath;
- (void)changePermissionsForPromotionComplete;
@end // @interface KeystoneGlue(Private)
const NSString* const kAutoupdateStatusNotification =
@"AutoupdateStatusNotification";
const NSString* const kAutoupdateStatusStatus = @"status";
const NSString* const kAutoupdateStatusVersion = @"version";
@implementation KeystoneGlue
+ (id)defaultKeystoneGlue {
static bool sTriedCreatingDefaultKeystoneGlue = false;
// TODO(jrg): use base::SingletonObjC<KeystoneGlue>
static KeystoneGlue* sDefaultKeystoneGlue = nil; // leaked
if (!sTriedCreatingDefaultKeystoneGlue) {
sTriedCreatingDefaultKeystoneGlue = true;
sDefaultKeystoneGlue = [[KeystoneGlue alloc] init];
[sDefaultKeystoneGlue loadParameters];
if (![sDefaultKeystoneGlue loadKeystoneRegistration]) {
[sDefaultKeystoneGlue release];
sDefaultKeystoneGlue = nil;
}
}
return sDefaultKeystoneGlue;
}
- (id)init {
if ((self = [super init])) {
NSNotificationCenter* center = [NSNotificationCenter defaultCenter];
[center addObserver:self
selector:@selector(registrationComplete:)
name:KSRegistrationDidCompleteNotification
object:nil];
[center addObserver:self
selector:@selector(promotionComplete:)
name:KSRegistrationPromotionDidCompleteNotification
object:nil];
[center addObserver:self
selector:@selector(checkForUpdateComplete:)
name:KSRegistrationCheckForUpdateNotification
object:nil];
[center addObserver:self
selector:@selector(installUpdateComplete:)
name:KSRegistrationStartUpdateNotification
object:nil];
}
return self;
}
- (void)dealloc {
[productID_ release];
[appPath_ release];
[url_ release];
[version_ release];
[channel_ release];
[registration_ release];
[[NSNotificationCenter defaultCenter] removeObserver:self];
[super dealloc];
}
- (NSDictionary*)infoDictionary {
// Use mac_util::MainAppBundle() to get the app framework's dictionary.
return [mac_util::MainAppBundle() infoDictionary];
}
- (void)loadParameters {
NSDictionary* infoDictionary = [self infoDictionary];
// Use [NSBundle mainBundle] to get the application's own bundle identifier
// and path, not the framework's. For auto-update, the application is
// what's significant here: it's used to locate the outermost part of the
// application for the existence checker and other operations that need to
// see the entire application bundle.
NSBundle* appBundle = [NSBundle mainBundle];
NSString* productID = [infoDictionary objectForKey:@"KSProductID"];
if (productID == nil) {
productID = [appBundle bundleIdentifier];
}
NSString* appPath = [appBundle bundlePath];
NSString* url = [infoDictionary objectForKey:@"KSUpdateURL"];
NSString* version = [infoDictionary objectForKey:@"KSVersion"];
if (!productID || !appPath || !url || !version) {
// If parameters required for Keystone are missing, don't use it.
return;
}
NSString* channel = [infoDictionary objectForKey:@"KSChannelID"];
// The stable channel has no tag. If updating to stable, remove the
// dev and beta tags since we've been "promoted".
if (channel == nil)
channel = KSRegistrationRemoveExistingTag;
productID_ = [productID retain];
appPath_ = [appPath retain];
url_ = [url retain];
version_ = [version retain];
channel_ = [channel retain];
}
- (BOOL)loadKeystoneRegistration {
if (!productID_ || !appPath_ || !url_ || !version_)
return NO;
// Load the KeystoneRegistration framework bundle if present. It lives
// inside the framework, so use mac_util::MainAppBundle();
NSString* ksrPath =
[[mac_util::MainAppBundle() privateFrameworksPath]
stringByAppendingPathComponent:@"KeystoneRegistration.framework"];
NSBundle* ksrBundle = [NSBundle bundleWithPath:ksrPath];
[ksrBundle load];
// Harness the KSRegistration class.
Class ksrClass = [ksrBundle classNamed:@"KSRegistration"];
KSRegistration* ksr = [ksrClass registrationWithProductID:productID_];
if (!ksr)
return NO;
registration_ = [ksr retain];
return YES;
}
- (void)registerWithKeystone {
[self updateStatus:kAutoupdateRegistering version:nil];
if (![registration_ registerWithVersion:version_
existenceCheckerType:kKSPathExistenceChecker
existenceCheckerString:appPath_
serverURLString:url_
preserveTTToken:YES
tag:channel_]) {
[self updateStatus:kAutoupdateRegisterFailed version:nil];
return;
}
// Upon completion, KSRegistrationDidCompleteNotification will be posted,
// and -registrationComplete: will be called.
// Mark an active RIGHT NOW; don't wait an hour for the first one.
[registration_ setActive];
// Set up hourly activity pings.
timer_ = [NSTimer scheduledTimerWithTimeInterval:60 * 60 // One hour
target:self
selector:@selector(markActive:)
userInfo:registration_
repeats:YES];
}
- (void)registrationComplete:(NSNotification*)notification {
NSDictionary* userInfo = [notification userInfo];
if ([[userInfo objectForKey:KSRegistrationStatusKey] boolValue]) {
[self updateStatus:kAutoupdateRegistered version:nil];
} else {
// Dump registration_?
[self updateStatus:kAutoupdateRegisterFailed version:nil];
}
}
- (void)stopTimer {
[timer_ invalidate];
}
- (void)markActive:(NSTimer*)timer {
KSRegistration* ksr = [timer userInfo];
[ksr setActive];
}
- (void)checkForUpdate {
DCHECK(![self asyncOperationPending]);
if (!registration_) {
[self updateStatus:kAutoupdateCheckFailed version:nil];
return;
}
[self updateStatus:kAutoupdateChecking version:nil];
[registration_ checkForUpdate];
// Upon completion, KSRegistrationCheckForUpdateNotification will be posted,
// and -checkForUpdateComplete: will be called.
}
- (void)checkForUpdateComplete:(NSNotification*)notification {
NSDictionary* userInfo = [notification userInfo];
if ([[userInfo objectForKey:KSRegistrationUpdateCheckErrorKey] boolValue]) {
[self updateStatus:kAutoupdateCheckFailed version:nil];
} else if ([[userInfo objectForKey:KSRegistrationStatusKey] boolValue]) {
// If an update is known to be available, go straight to
// -updateStatus:version:. It doesn't matter what's currently on disk.
NSString* version = [userInfo objectForKey:KSRegistrationVersionKey];
[self updateStatus:kAutoupdateAvailable version:version];
} else {
// If no updates are available, check what's on disk, because an update
// may have already been installed. This check happens on another thread,
// and -updateStatus:version: will be called on the main thread when done.
[self determineUpdateStatusAsync];
}
}
- (void)installUpdate {
DCHECK(![self asyncOperationPending]);
if (!registration_) {
[self updateStatus:kAutoupdateInstallFailed version:nil];
return;
}
[self updateStatus:kAutoupdateInstalling version:nil];
[registration_ startUpdate];
// Upon completion, KSRegistrationStartUpdateNotification will be posted,
// and -installUpdateComplete: will be called.
}
- (void)installUpdateComplete:(NSNotification*)notification {
NSDictionary* userInfo = [notification userInfo];
if (![[userInfo objectForKey:KSUpdateCheckSuccessfulKey] boolValue] ||
![[userInfo objectForKey:KSUpdateCheckSuccessfullyInstalledKey]
intValue]) {
[self updateStatus:kAutoupdateInstallFailed version:nil];
} else {
updateSuccessfullyInstalled_ = YES;
// Nothing in the notification dictionary reports the version that was
// installed. Figure it out based on what's on disk.
[self determineUpdateStatusAsync];
}
}
// Runs on the main thread.
- (void)determineUpdateStatusAsync {
DCHECK([NSThread isMainThread]);
SEL selector = @selector(determineUpdateStatus);
NSInvocationOperation* operation =
[[[NSInvocationOperation alloc] initWithTarget:self
selector:selector
object:nil] autorelease];
NSOperationQueue* operationQueue = [WorkerPoolObjC sharedOperationQueue];
[operationQueue addOperation:operation];
}
// Runs on a thread managed by NSOperationQueue.
- (void)determineUpdateStatus {
DCHECK(![NSThread isMainThread]);
NSString* appInfoPlistPath =
[[appPath_ stringByAppendingPathComponent:@"Contents"]
stringByAppendingPathComponent:@"Info.plist"];
NSDictionary* infoPlist =
[NSDictionary dictionaryWithContentsOfFile:appInfoPlistPath];
NSString* version = [infoPlist objectForKey:@"CFBundleShortVersionString"];
[self performSelectorOnMainThread:@selector(determineUpdateStatusForVersion:)
withObject:version
waitUntilDone:NO];
}
// Runs on the main thread.
- (void)determineUpdateStatusForVersion:(NSString*)version {
DCHECK([NSThread isMainThread]);
AutoupdateStatus status;
if (updateSuccessfullyInstalled_) {
// If an update was successfully installed and this object saw it happen,
// then don't even bother comparing versions.
status = kAutoupdateInstalled;
} else {
NSString* currentVersion =
[NSString stringWithUTF8String:chrome::kChromeVersion];
if (!version) {
// If the version on disk could not be determined, assume that
// whatever's running is current.
version = currentVersion;
status = kAutoupdateCurrent;
} else if ([version isEqualToString:currentVersion]) {
status = kAutoupdateCurrent;
} else {
// If the version on disk doesn't match what's currently running, an
// update must have been applied in the background, without this app's
// direct participation. Leave updateSuccessfullyInstalled_ alone
// because there's no direct knowledge of what actually happened.
status = kAutoupdateInstalled;
}
}
[self updateStatus:status version:version];
}
- (void)updateStatus:(AutoupdateStatus)status version:(NSString*)version {
NSNumber* statusNumber = [NSNumber numberWithInt:status];
NSMutableDictionary* dictionary =
[NSMutableDictionary dictionaryWithObject:statusNumber
forKey:kAutoupdateStatusStatus];
if (version) {
[dictionary setObject:version forKey:kAutoupdateStatusVersion];
}
NSNotification* notification =
[NSNotification notificationWithName:kAutoupdateStatusNotification
object:self
userInfo:dictionary];
recentNotification_.reset([notification retain]);
[[NSNotificationCenter defaultCenter] postNotification:notification];
}
- (NSNotification*)recentNotification {
return [[recentNotification_ retain] autorelease];
}
- (AutoupdateStatus)recentStatus {
NSDictionary* dictionary = [recentNotification_ userInfo];
return static_cast<AutoupdateStatus>(
[[dictionary objectForKey:kAutoupdateStatusStatus] intValue]);
}
- (BOOL)asyncOperationPending {
AutoupdateStatus status = [self recentStatus];
return status == kAutoupdateRegistering ||
status == kAutoupdateChecking ||
status == kAutoupdateInstalling ||
status == kAutoupdatePromoting;
}
- (BOOL)isUserTicket {
return [registration_ ticketType] == kKSRegistrationUserTicket;
}
- (BOOL)isOnReadOnlyFilesystem {
const char* appPathC = [appPath_ fileSystemRepresentation];
struct statfs statfsBuf;
if (statfs(appPathC, &statfsBuf) != 0) {
PLOG(ERROR) << "statfs";
// Be optimistic about the filesystem's writability.
return NO;
}
return (statfsBuf.f_flags & MNT_RDONLY) != 0;
}
- (BOOL)needsPromotion {
if (![self isUserTicket] || [self isOnReadOnlyFilesystem]) {
return NO;
}
// Check the outermost bundle directory, the main executable path, and the
// framework directory. It may be enough to just look at the outermost
// bundle directory, but checking an interior file and directory can be
// helpful in case permissions are set differently only on the outermost
// directory. An interior file and directory are both checked because some
// file operations, such as Snow Leopard's Finder's copy operation when
// authenticating, may actually result in different ownership being applied
// to files and directories.
NSFileManager* fileManager = [NSFileManager defaultManager];
NSString* executablePath = [[NSBundle mainBundle] executablePath];
NSString* frameworkPath = [mac_util::MainAppBundle() bundlePath];
return ![fileManager isWritableFileAtPath:appPath_] ||
![fileManager isWritableFileAtPath:executablePath] ||
![fileManager isWritableFileAtPath:frameworkPath];
}
- (BOOL)wantsPromotion {
// -needsPromotion checks these too, but this method doesn't necessarily
// return NO just becuase -needsPromotion returns NO, so another check is
// needed here.
if (![self isUserTicket] || [self isOnReadOnlyFilesystem]) {
return NO;
}
if ([self needsPromotion]) {
return YES;
}
return [appPath_ hasPrefix:@"/Applications/"];
}
- (void)promoteTicket {
if ([self asyncOperationPending] || ![self wantsPromotion]) {
// Because there are multiple ways of reaching promoteTicket that might
// not lock each other out, it may be possible to arrive here while an
// asynchronous operation is pending, or even after promotion has already
// occurred. Just quietly return without doing anything.
return;
}
// Create an empty AuthorizationRef.
scoped_AuthorizationRef authorization;
OSStatus status = AuthorizationCreate(NULL,
kAuthorizationEmptyEnvironment,
kAuthorizationFlagDefaults,
&authorization);
if (status != errAuthorizationSuccess) {
LOG(ERROR) << "AuthorizationCreate: " << status;
return;
}
// Specify the "system.privilege.admin" right, which allows
// AuthorizationExecuteWithPrivileges to run commands as root.
AuthorizationItem rightItems[] = {
{kAuthorizationRightExecute, 0, NULL, 0}
};
AuthorizationRights rights = {arraysize(rightItems), rightItems};
// product_logo_32.png is used instead of app.icns because Authorization
// Services requires an image that NSImage can read.
NSString* iconPath =
[mac_util::MainAppBundle() pathForResource:@"product_logo_32"
ofType:@"png"];
const char* iconPathC = [iconPath fileSystemRepresentation];
size_t iconPathLength = iconPathC ? strlen(iconPathC) : 0;
// The OS will append " Type an administrator's name and password to allow
// <CFBundleDisplayName> to make changes."
NSString* prompt = l10n_util::GetNSStringFWithFixup(
IDS_PROMOTE_AUTHENTICATION_PROMPT,
l10n_util::GetStringUTF16(IDS_PRODUCT_NAME));
const char* promptC = [prompt UTF8String];
size_t promptLength = promptC ? strlen(promptC) : 0;
AuthorizationItem environmentItems[] = {
{kAuthorizationEnvironmentIcon, iconPathLength, (void*)iconPathC, 0},
{kAuthorizationEnvironmentPrompt, promptLength, (void*)promptC, 0}
};
AuthorizationEnvironment environment = {arraysize(environmentItems),
environmentItems};
AuthorizationFlags flags = kAuthorizationFlagDefaults |
kAuthorizationFlagInteractionAllowed |
kAuthorizationFlagExtendRights |
kAuthorizationFlagPreAuthorize;
status = AuthorizationCopyRights(authorization,
&rights,
&environment,
flags,
NULL);
if (status != errAuthorizationSuccess) {
if (status != errAuthorizationCanceled) {
LOG(ERROR) << "AuthorizationCopyRights: " << status;
}
return;
}
[self updateStatus:kAutoupdatePromoting version:nil];
// TODO(mark): Remove when able!
//
// keystone_promote_preflight is hopefully temporary. It's here to ensure
// that the Keystone system ticket store is in a usable state for all users
// on the system. Ideally, Keystone's installer or another part of Keystone
// would handle this. The underlying problem is http://b/2285921, and it
// causes http://b/2289908, which this workaround addresses.
//
// This is run synchronously, which isn't optimal, but
// -[KSRegistration promoteWithVersion:...] is currently synchronous too,
// and this operation needs to happen before that one.
//
// TODO(mark): Make asynchronous. That only makes sense if the promotion
// operation itself is asynchronous too. http://b/2290009. Hopefully,
// the Keystone promotion code will just be changed to do what preflight
// now does, and then the preflight script can be removed instead.
NSString* preflightPath =
[mac_util::MainAppBundle() pathForResource:@"keystone_promote_preflight"
ofType:@"sh"];
const char* preflightPathC = [preflightPath fileSystemRepresentation];
const char* arguments[] = {NULL};
int exit_status;
status = authorization_util::ExecuteWithPrivilegesAndWait(
authorization,
preflightPathC,
kAuthorizationFlagDefaults,
arguments,
NULL, // pipe
&exit_status);
if (status != errAuthorizationSuccess) {
LOG(ERROR) << "AuthorizationExecuteWithPrivileges preflight: " << status;
[self updateStatus:kAutoupdatePromoteFailed version:nil];
return;
}
if (exit_status != 0) {
LOG(ERROR) << "keystone_promote_preflight status " << exit_status;
[self updateStatus:kAutoupdatePromoteFailed version:nil];
return;
}
// Hang on to the AuthorizationRef so that it can be used once promotion is
// complete. Do this before asking Keystone to promote the ticket, because
// -promotionComplete: may be called from inside the Keystone promotion
// call.
authorization_.swap(authorization);
if (![registration_ promoteWithVersion:version_
existenceCheckerType:kKSPathExistenceChecker
existenceCheckerString:appPath_
serverURLString:url_
preserveTTToken:YES
tag:channel_
authorization:authorization_]) {
[self updateStatus:kAutoupdatePromoteFailed version:nil];
authorization_.reset();
return;
}
// Upon completion, KSRegistrationPromotionDidCompleteNotification will be
// posted, and -promotionComplete: will be called.
}
- (void)promotionComplete:(NSNotification*)notification {
NSDictionary* userInfo = [notification userInfo];
if ([[userInfo objectForKey:KSRegistrationStatusKey] boolValue]) {
[self changePermissionsForPromotionAsync];
} else {
authorization_.reset();
[self updateStatus:kAutoupdatePromoteFailed version:nil];
}
}
- (void)changePermissionsForPromotionAsync {
// NSBundle is not documented as being thread-safe. Do NSBundle operations
// on the main thread before jumping over to a NSOperationQueue-managed
// thread to run the tool.
DCHECK([NSThread isMainThread]);
SEL selector = @selector(changePermissionsForPromotionWithTool:);
NSString* toolPath =
[mac_util::MainAppBundle() pathForResource:@"keystone_promote_postflight"
ofType:@"sh"];
NSInvocationOperation* operation =
[[[NSInvocationOperation alloc] initWithTarget:self
selector:selector
object:toolPath] autorelease];
NSOperationQueue* operationQueue = [WorkerPoolObjC sharedOperationQueue];
[operationQueue addOperation:operation];
}
- (void)changePermissionsForPromotionWithTool:(NSString*)toolPath {
const char* toolPathC = [toolPath fileSystemRepresentation];
const char* appPathC = [appPath_ fileSystemRepresentation];
const char* arguments[] = {appPathC, NULL};
int exit_status;
OSStatus status = authorization_util::ExecuteWithPrivilegesAndWait(
authorization_,
toolPathC,
kAuthorizationFlagDefaults,
arguments,
NULL, // pipe
&exit_status);
if (status != errAuthorizationSuccess) {
LOG(ERROR) << "AuthorizationExecuteWithPrivileges postflight: " << status;
} else if (exit_status != 0) {
LOG(ERROR) << "keystone_promote_postflight status " << exit_status;
}
SEL selector = @selector(changePermissionsForPromotionComplete);
[self performSelectorOnMainThread:selector
withObject:nil
waitUntilDone:NO];
}
- (void)changePermissionsForPromotionComplete {
authorization_.reset();
[self updateStatus:kAutoupdatePromoted version:nil];
}
@end // @implementation KeystoneGlue
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