/* * Copyright (c) 2000-2002 Apple Computer, Inc. All Rights Reserved. * * The contents of this file constitute Original Code as defined in and are * subject to the Apple Public Source License Version 1.2 (the 'License'). * You may not use this file except in compliance with the License. Please obtain * a copy of the License at http://www.apple.com/publicsource and read it before * using this file. * * This Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the * specific language governing rights and limitations under the License. */ /* File: CCallbackMgr.cp Contains: Code that communicates with processes that install a callback with the Keychain Manager to receive keychain events. */ #include "CCallbackMgr.h" #include <algorithm> #include <list> #include <CoreServices/../Frameworks/CarbonCore.framework/Headers/MacTypes.h> #include "Globals.h" #include <Security/DLDBListCFPref.h> #include <Security/SecCFTypes.h> //#include <Security/Keychain.h> using namespace KeychainCore; using namespace CssmClient; #pragma mark ΡΡΡΡ CallbackInfo ΡΡΡΡ CallbackInfo::CallbackInfo() : mCallback(NULL),mEventMask(0),mContext(NULL) { } CallbackInfo::CallbackInfo(SecKeychainCallback inCallbackFunction, SecKeychainEventMask inEventMask, void *inContext) : mCallback(inCallbackFunction), mEventMask(inEventMask), mContext(inContext) { } CallbackInfo::~CallbackInfo() { } bool CallbackInfo::operator==(const CallbackInfo& other) const { return mCallback==other.mCallback; } bool CallbackInfo::operator!=(const CallbackInfo& other) const { return !(*this==other); } #pragma mark ΡΡΡΡ CCallbackMgr ΡΡΡΡ CCallbackMgr *CCallbackMgr::mCCallbackMgr; CCallbackMgr::CCallbackMgr() : // register for receiving Keychain events via CF Observer(kSecEventNotificationName, NULL, CFNotificationSuspensionBehaviorDeliverImmediately) { } CCallbackMgr::~CCallbackMgr() { } CCallbackMgr& CCallbackMgr::Instance() { if (!mCCallbackMgr) mCCallbackMgr = new CCallbackMgr(); return *mCCallbackMgr; } void CCallbackMgr::AddCallback( SecKeychainCallback inCallbackFunction, SecKeychainEventMask inEventMask, void* inContext) { CallbackInfo info( inCallbackFunction, inEventMask, inContext ); CallbackInfo existingInfo; CallbackInfoListIterator ix = find( CCallbackMgr::Instance().mEventCallbacks.begin(), CCallbackMgr::Instance().mEventCallbacks.end(), info ); // make sure it is not already there if ( ix!=CCallbackMgr::Instance().mEventCallbacks.end() ) { // It's already there. This could mean that the old process died unexpectedly, // so we need to validate the process ID of the existing callback. // On Mac OS X this list is per process so this is always a duplicate MacOSError::throwMe(errSecDuplicateCallback); } CCallbackMgr::Instance().mEventCallbacks.push_back(info); } class Predicate { SecKeychainCallback mCallbackFunction; public: Predicate(SecKeychainCallback inCallbackFunction) : mCallbackFunction(inCallbackFunction) {} bool operator()(const CallbackInfo &cbInfo) { return cbInfo.mCallback == mCallbackFunction; } }; void CCallbackMgr::RemoveCallback(SecKeychainCallback inCallbackFunction) { size_t oldSize = CCallbackMgr::Instance().mEventCallbacks.size(); Predicate predicate(inCallbackFunction); CCallbackMgr::Instance().mEventCallbacks.remove_if(predicate); if (oldSize == CCallbackMgr::Instance().mEventCallbacks.size()) MacOSError::throwMe(errSecInvalidCallback); } void CCallbackMgr::AlertClients(SecKeychainEvent inEvent, pid_t inPid, const Keychain &inKeychain, const Item &inItem) { debug("kcnotify", "dispatch event %d pid %d keychain %p item %p", inEvent, inPid, &inKeychain, !!inItem ? &*inItem : NULL); // Deal with events that we care about ourselves first. if (inEvent == kSecDefaultChangedEvent) globals().defaultKeychain.reload(true); else if (inEvent == kSecKeychainListChangedEvent) globals().storageManager.reload(true); else if (inEvent == kSecDeleteEvent && inKeychain.get() && inItem.get()) inKeychain->didDeleteItem(inItem.get()); // Iterate through callbacks, looking for those registered for inEvent const SecKeychainEventMask theMask = 1U << inEvent; for ( CallbackInfoListIterator ix = CCallbackMgr::Instance().mEventCallbacks.begin(); ix != CCallbackMgr::Instance().mEventCallbacks.end(); ++ix ) { if (!(ix->mEventMask & theMask)) continue; SecKeychainCallbackInfo cbInfo; cbInfo.version = 0; // @@@ kKeychainAPIVersion; cbInfo.item = inItem ? gTypes().item.handle(*inItem) : 0; cbInfo.keychain = inKeychain ? gTypes().keychain.handle(*inKeychain) : 0; cbInfo.pid = inPid; ix->mCallback(inEvent, &cbInfo, ix->mContext); } } /*********************************************************************************** * Event() - Overriden function of the KCEventObserver object. * Each instance of KeychainCore will receive events from CF * that was initiated by another KeychainCore instance that * triggered the event. * * We <could> care about which KeychainCore posted the event: * Example (KCDeleteItem event): * If it was 'us', we don't do anything; we already processed the event. * If it wasn't 'us', we should remove our cached reference to the item that was deleted. * ***********************************************************************************/ void CCallbackMgr::Event(CFNotificationCenterRef center, CFStringRef name, const void *object, CFDictionaryRef userInfo) { // Decode from userInfo the event type, 'keychain' CFDict, and 'item' CFDict CCFValue event(CFDictionaryGetValue( userInfo, kSecEventTypeKey )); SecKeychainEvent thisEvent = 0; if (!event.hasValue()) return; thisEvent = sint32( event ); CFNumberRef pid = reinterpret_cast<CFNumberRef> (CFDictionaryGetValue(userInfo, kSecEventPidKey)); pid_t thisPid; if (!pid || !CFNumberGetValue(pid, kCFNumberSInt32Type, &thisPid)) { thisPid = 0; } CFDictionaryRef kc = reinterpret_cast<CFDictionaryRef> (CFDictionaryGetValue(userInfo, kSecEventKeychainKey)); Keychain thisKeychain; if (kc) { thisKeychain = globals().storageManager.keychain (DLDbListCFPref::cfDictionaryRefToDLDbIdentifier(kc)); } CFDataRef item = reinterpret_cast<CFDataRef> (CFDictionaryGetValue(userInfo, kSecEventItemKey)); Item thisItem; if (item && thisKeychain) { const CssmData pkData(const_cast<UInt8*>(CFDataGetBytePtr(item)), CFDataGetLength(item)); PrimaryKey pk(pkData); thisItem = thisKeychain->item(pk); } // Notify our process of this event. CCallbackMgr::AlertClients(thisEvent, thisPid, thisKeychain, thisItem); }