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1 /*
2 * Copyright (c) 2012-2017 Apple Inc. All Rights Reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24
25 /*
26 * SOSEngine.c - Implementation of a secure object syncing engine
27 */
28
29 #include <Security/SecureObjectSync/SOSChangeTracker.h>
30 #include <Security/SecureObjectSync/SOSEnginePriv.h>
31 #include <Security/SecureObjectSync/SOSDigestVector.h>
32 #include <Security/SecureObjectSync/SOSInternal.h>
33 #include <Security/SecureObjectSync/SOSPeer.h>
34 #include <Security/SecureObjectSync/SOSViews.h>
35 #include <Security/SecureObjectSync/SOSBackupEvent.h>
36 #include <Security/SecureObjectSync/SOSPersist.h>
37 #include <Security/SecureObjectSync/SOSCloudCircleInternal.h>
38
39 #include <corecrypto/ccder.h>
40 #include <stdlib.h>
41 #include <stdbool.h>
42 #include <utilities/array_size.h>
43 #include <utilities/SecCFCCWrappers.h>
44 #include <utilities/SecCFError.h>
45 #include <utilities/SecCFRelease.h>
46 #include <utilities/SecCFWrappers.h>
47 #include <utilities/der_plist.h>
48 #include <utilities/der_plist_internal.h>
49 #include <utilities/debugging.h>
50 #include <utilities/iCloudKeychainTrace.h>
51 #include <utilities/SecCoreCrypto.h>
52 #include <utilities/SecFileLocations.h>
53 #include <utilities/SecADWrapper.h>
54 #include <utilities/SecTrace.h>
55
56
57 #include <AssertMacros.h>
58 #include <CoreFoundation/CoreFoundation.h>
59
60 #include <securityd/SecItemServer.h> // TODO: We can't leave this here.
61 #include <securityd/SOSCloudCircleServer.h> // TODO: We can't leave this here.
62 #include <Security/SecItem.h> // TODO: We can't leave this here.
63 #include <Security/SecItemPriv.h> // TODO: We can't leave this here.
64 #include <securityd/SecItemSchema.h>
65 #include <securityd/iCloudTrace.h>
66
67 #include <keychain/ckks/CKKS.h>
68
69 #include <CoreFoundation/CFURL.h>
70
71 #include <Security/SecureObjectSync/SOSEnsureBackup.h>
72
73 //
74 // MARK: SOSEngine The Keychain database with syncable keychain support.
75 //
76
77 //----------------------------------------------------------------------------------------
78 // MARK: Engine state v0
79 //----------------------------------------------------------------------------------------
80
81 // Key in dataSource for general engine state file.
82 // This file only has digest entries in it, no manifests.
83 static const CFStringRef kSOSEngineState = CFSTR("engine-state");
84
85 // Keys in state dictionary
86 static CFStringRef kSOSEngineManifestCacheKey = CFSTR("manifestCache");
87 static CFStringRef kSOSEnginePeerStateKey = CFSTR("peerState");
88 static CFStringRef kSOSEnginePeerIDsKey = CFSTR("peerIDs");
89 static CFStringRef kSOSEngineIDKey = CFSTR("id");
90 static CFStringRef kSOSEngineTraceDateKey = CFSTR("traceDate");
91
92 //----------------------------------------------------------------------------------------
93 // MARK: Engine state v2
94 //----------------------------------------------------------------------------------------
95
96 #if !TARGET_IPHONE_SIMULATOR
97 static const CFIndex kCurrentEngineVersion = 2;
98 #endif
99 // Keychain/datasource items
100 // Used for the kSecAttrAccount when saving in the datasource with dsSetStateWithKey
101 // Class D [kSecAttrAccessibleAlwaysPrivate/kSecAttrAccessibleAlwaysThisDeviceOnly]
102 CFStringRef kSOSEngineStatev2 = CFSTR("engine-state-v2");
103 CFStringRef kSOSEnginePeerStates = CFSTR("engine-peer-states");
104 CFStringRef kSOSEngineManifestCache = CFSTR("engine-manifest-cache");
105 CFStringRef kSOSEngineCoders = CFSTR("engine-coders");
106 #define kSOSEngineProtectionDomainClassA kSecAttrAccessibleWhenUnlockedThisDeviceOnly
107
108 // Keys for individual dictionaries
109 // engine-state-v2
110 CFStringRef kSOSEngineStateVersionKey = CFSTR("engine-stateVersion");
111
112 // Current save/load routines
113 // SOSEngineCreate/SOSEngineLoad/SOSEngineSetState
114 // SOSEngineSave/SOSEngineDoSave/SOSEngineCopyState
115 // no save/load functions external to this file
116
117 /*
118 Divide engine state into five pieces:
119
120 - General engine state
121 - My peer ID
122 - List of other (trusted) peer IDs
123
124 - Coder data (formerly in peer state)
125 - Backup Keybags (backup peers only)
126 - Peer state (including manifest hashes -- just keys into ManifestCache)
127 [__OpaqueSOSPeer/SOSPeerRef]
128 must-send
129 send-objects
130 sequence-number
131 Peer object states:
132 pending-objects
133 unwanted-manifest
134 confirmed-manifest
135 local-manifest
136 pending-manifest
137 Views
138
139 - Manifest Cache
140 - local manifest hashes (copy of local keychain)
141 - peer manifest hashes
142
143 These divisions are based on size, frequency of update, and protection domain
144
145 The Manifest Cache is a dictionary where each key is a hash over its entry,
146 which is a concatenation of 20 byte hashes of the keychain items. The local
147 keychain is present as one entry. The other entries are subsets of that, one
148 for each confirmed/pending/missing/unwanted shared with a peer. The local
149 keychain entry can be re-created by iterating over the databse, whereas the
150 others are built up through communicating with other peers.
151
152 83:d=2 hl=2 l= 13 prim: UTF8STRING :manifestCache
153 98:d=2 hl=4 l= 912 cons: SET
154 102:d=3 hl=2 l= 24 cons: SEQUENCE
155 104:d=4 hl=2 l= 20 prim: OCTET STRING [HEX DUMP]:DA39A3EE5E6B4B0D3255BFEF95601890AFD80709
156 126:d=4 hl=2 l= 0 prim: OCTET STRING
157 128:d=3 hl=2 l= 124 cons: SEQUENCE
158 130:d=4 hl=2 l= 20 prim: OCTET STRING [HEX DUMP]:F9B59370A4733F0D174E8D220C5BE3AF062C775B
159 152:d=4 hl=2 l= 100 prim: OCTET STRING [HEX DUMP]:5A574BB4EC90C3BBCC69EE73CBFE039133AE807265D6A58003B8D205997EAB96390AAB207E63A2E270A476CAB5B2D9D2F7B0E55512AA957B58D5658E7EF907B069B83AA6BA941790A3C3C4A68292D59DABA3CA342966EFF82E1ACAEB691FD6E20772E17E
160 254:d=3 hl=4 l= 366 cons: SEQUENCE
161 258:d=4 hl=2 l= 20 prim: OCTET STRING [HEX DUMP]:2E69C2F7F3E014075B30004CE0EC6C1AD419EBF5
162 280:d=4 hl=4 l= 340 prim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
163 624:d=3 hl=4 l= 386 cons: SEQUENCE
164 628:d=4 hl=2 l= 20 prim: OCTET STRING [HEX DUMP]:CCF179FF718C10F151E7409EDF1A06F0DF10DCAD
165 650:d=4 hl=4 l= 360 prim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
166
167 */
168
169
170
171 static bool SOSEngineLoad(SOSEngineRef engine, SOSTransactionRef txn, CFErrorRef *error);
172 static bool SOSEngineSetPeers_locked(SOSEngineRef engine, SOSPeerMetaRef myPeerMeta, CFArrayRef trustedPeerMetas, CFArrayRef untrustedPeerMetas);
173 static void SOSEngineApplyPeerState(SOSEngineRef engine, CFDictionaryRef peerStateMap);
174 static void SOSEngineSynthesizePeerMetas(SOSEngineRef engine, CFMutableArrayRef trustedPeersMetas, CFMutableArrayRef untrustedPeers);
175 static bool SOSEngineLoadCoders(SOSEngineRef engine, SOSTransactionRef txn, CFErrorRef *error);
176 #if !TARGET_IPHONE_SIMULATOR
177 static bool SOSEngineDeleteV0State(SOSEngineRef engine, SOSTransactionRef txn, CFErrorRef *error);
178 #endif
179
180 static CFStringRef SOSPeerIDArrayCreateString(CFArrayRef peerIDs) {
181 return peerIDs ? CFStringCreateByCombiningStrings(kCFAllocatorDefault, peerIDs, CFSTR(" ")) : CFSTR("");
182 }
183
184 static CFStringRef SOSEngineCopyFormattingDesc(CFTypeRef cf, CFDictionaryRef formatOptions) {
185 SOSEngineRef engine = (SOSEngineRef)cf;
186 CFStringRef tpDesc = SOSPeerIDArrayCreateString(engine->peerIDs);
187 CFStringRef desc = CFStringCreateWithFormat(kCFAllocatorDefault, formatOptions, CFSTR("<Engine %@ peers %@ MC[%d] PS[%d]>"), engine->myID, tpDesc, engine->manifestCache ? (int)CFDictionaryGetCount(engine->manifestCache) : 0, engine->peerMap ? (int)CFDictionaryGetCount(engine->peerMap) : 0);
188 CFReleaseSafe(tpDesc);
189 return desc;
190 }
191
192 static CFStringRef SOSEngineCopyDebugDesc(CFTypeRef cf) {
193 return SOSEngineCopyFormattingDesc(cf, NULL);
194 }
195
196 static dispatch_queue_t sEngineQueue;
197 static CFDictionaryRef sEngineMap;
198
199 CFGiblisWithFunctions(SOSEngine, NULL, NULL, NULL, NULL, NULL, SOSEngineCopyFormattingDesc, SOSEngineCopyDebugDesc, NULL, NULL, ^{
200 sEngineQueue = dispatch_queue_create("SOSEngine queue", DISPATCH_QUEUE_SERIAL);
201 sEngineMap = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
202 });
203
204 #define _LOG_RAW_MESSAGES 0
205 void logRawMessage(CFDataRef message, bool sending, uint64_t seqno)
206 {
207 #if _LOG_RAW_MESSAGES
208 CFStringRef hexMessage = NULL;
209 if (message) {
210 hexMessage = CFDataCopyHexString(message);
211 if (sending)
212 secnoticeq("engine", "%s RAW%1d %@", sending ? "send" : "recv", seqno?2:0, hexMessage);
213 else
214 secnoticeq("engine", "%s RAWx %@", sending ? "send" : "recv", hexMessage); // we don't know vers of received msg here
215 }
216 CFReleaseSafe(hexMessage);
217 #endif
218 }
219
220 //
221 // Peer state layout. WRONG! It's an array now
222 // The peer state is an array.
223 // The first element of the array is a dictionary with any number of keys and
224 // values in it (for future expansion) such as changing the digest size or type
225 // or remembering boolean flags for a peers sake.
226 // The next three are special in that they are manifest digests with special
227 // meaning and rules as to how they are treated (These are dynamically updated
228 // based on database activity so they have a fully history of all changes made
229 // to the local db. The first is the manifest representing the pendingObjects
230 // to send to the other peer. This is normally only ever appending to, and in
231 // particular with transactions originating from the Keychain API that affect
232 // syncable items will need to add the new objects digests to the pendingObjects list
233 // while adding the digests of any tombstones encountered to the extra list.
234
235 CFStringRef SOSEngineGetMyID(SOSEngineRef engine) {
236 // TODO: this should not be needed
237 return engine->myID;
238 }
239
240 // TEMPORARY: Get the list of IDs for cleanup, this shouldn't be used instead it should iterate KVS.
241 CFArrayRef SOSEngineGetPeerIDs(SOSEngineRef engine) {
242 if(!engine) return NULL;
243 return engine->peerIDs;
244 }
245
246 void SOSEngineClearCache(SOSEngineRef engine){
247 CFReleaseNull(engine->manifestCache);
248 CFReleaseNull(engine->localMinusUnreadableDigest);
249 if (engine->save_timer)
250 dispatch_source_cancel(engine->save_timer);
251 dispatch_release(engine->queue);
252 engine->queue = NULL;
253 }
254
255 static SOSPeerRef SOSEngineCopyPeerWithMapEntry_locked(SOSEngineRef engine, CFStringRef peerID, CFTypeRef mapEntry, CFErrorRef *error) {
256 SOSPeerRef peer = NULL;
257 if (mapEntry && CFGetTypeID(mapEntry) == SOSPeerGetTypeID()) {
258 // The mapEntry is an SOSPeer, so we're done.
259 peer = (SOSPeerRef)CFRetain(mapEntry);
260 } else {
261 // The mapEntry is a peerState, attempt to initialize a new
262 // peer iff peerID is in the set of trusted peerIDs
263 if (engine->peerIDs && CFArrayContainsValue(engine->peerIDs, CFRangeMake(0, CFArrayGetCount(engine->peerIDs)), peerID)) {
264 CFErrorRef localError = NULL;
265 peer = SOSPeerCreateWithState(engine, peerID, mapEntry, &localError);
266 if (!peer) {
267 secerror("error inflating peer: %@: %@ from state: %@", peerID, localError, mapEntry);
268 CFReleaseNull(localError);
269 peer = SOSPeerCreateWithState(engine, peerID, NULL, error);
270 }
271 if (peer) {
272 // Replace the map entry with the inflated peer.
273 CFDictionarySetValue(engine->peerMap, peerID, peer);
274 }
275 } else {
276 SOSErrorCreate(kSOSErrorPeerNotFound, error, NULL, CFSTR("peer: %@ is untrusted inflating not allowed"), peerID);
277 }
278 }
279 return peer;
280 }
281
282 static SOSPeerRef SOSEngineCopyPeerWithID_locked(SOSEngineRef engine, CFStringRef peerID, CFErrorRef *error) {
283 CFTypeRef mapEntry = CFDictionaryGetValue(engine->peerMap, peerID);
284 SOSPeerRef peer = NULL;
285 if (mapEntry) {
286 peer = SOSEngineCopyPeerWithMapEntry_locked(engine, peerID, mapEntry, error);
287 } else {
288 peer = NULL;
289 secerror("peer: %@ not found, peerMap: %@, engine: %@", peerID, engine->peerMap, engine);
290 SOSErrorCreate(kSOSErrorPeerNotFound, error, NULL, CFSTR("peer: %@ not found"), peerID);
291 }
292 return peer;
293 }
294
295 struct SOSEngineWithPeerContext {
296 SOSEngineRef engine;
297 void (^with)(SOSPeerRef peer);
298 };
299
300 static void SOSEngineWithPeerMapEntry_locked(const void *peerID, const void *mapEntry, void *context) {
301 struct SOSEngineWithPeerContext *ewp = context;
302 SOSPeerRef peer = SOSEngineCopyPeerWithMapEntry_locked(ewp->engine, peerID, mapEntry, NULL);
303 if (peer) {
304 ewp->with(peer);
305 CFRelease(peer);
306 }
307 }
308
309 static void SOSEngineForEachPeer_locked(SOSEngineRef engine, void (^with)(SOSPeerRef peer)) {
310 struct SOSEngineWithPeerContext ewp = { .engine = engine, .with = with };
311 CFDictionaryRef peerMapCopy = CFDictionaryCreateCopy(NULL, engine->peerMap);
312 CFDictionaryApplyFunction(peerMapCopy, SOSEngineWithPeerMapEntry_locked, &ewp);
313 CFRelease(peerMapCopy);
314 }
315
316 static void SOSEngineWithBackupPeerMapEntry_locked(const void *peerID, const void *mapEntry, void *context) {
317 struct SOSEngineWithPeerContext *ewp = context;
318 // v0 backup peer is always in map but we only consider it a backup peer if it has a keybag.
319 if (SOSPeerMapEntryIsBackup(mapEntry)) {
320 SOSPeerRef peer = SOSEngineCopyPeerWithMapEntry_locked(ewp->engine, peerID, mapEntry, NULL);
321 if (peer) {
322 ewp->with(peer);
323 CFRelease(peer);
324 }
325 }
326 }
327
328 static void SOSEngineForEachBackupPeer_locked(SOSEngineRef engine, void (^with)(SOSPeerRef peer)) {
329 struct SOSEngineWithPeerContext ewp = { .engine = engine, .with = with };
330 CFDictionaryRef peerMapCopy = CFDictionaryCreateCopy(NULL, engine->peerMap);
331 CFDictionaryApplyFunction(peerMapCopy, SOSEngineWithBackupPeerMapEntry_locked, &ewp);
332 CFRelease(peerMapCopy);
333 }
334
335 //
336 // Manifest cache
337 //
338 SOSManifestRef SOSEngineGetManifestForDigest(SOSEngineRef engine, CFDataRef digest) {
339 if (!engine->manifestCache || !digest) return NULL;
340 SOSManifestRef manifest = (SOSManifestRef)CFDictionaryGetValue(engine->manifestCache, digest);
341 if (!manifest) return NULL;
342 if (CFGetTypeID(manifest) != SOSManifestGetTypeID()) {
343 secerror("dropping corrupt manifest for %@ from cache", digest);
344 CFDictionaryRemoveValue(engine->manifestCache, digest);
345 return NULL;
346 }
347
348 return manifest;
349 }
350
351 void SOSEngineAddManifest(SOSEngineRef engine, SOSManifestRef manifest) {
352 CFDataRef digest = SOSManifestGetDigest(manifest, NULL);
353 if (digest) {
354 if (!engine->manifestCache)
355 engine->manifestCache = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
356 CFDictionaryAddValue(engine->manifestCache, digest, manifest);
357 }
358 }
359
360 CFDataRef SOSEnginePatchRecordAndCopyDigest(SOSEngineRef engine, SOSManifestRef base, SOSManifestRef removals, SOSManifestRef additions, CFErrorRef *error) {
361 CFDataRef digest = NULL;
362 SOSManifestRef manifest = SOSManifestCreateWithPatch(base, removals, additions, error);
363 if (manifest) {
364 SOSEngineAddManifest(engine, manifest);
365 digest = CFRetainSafe(SOSManifestGetDigest(manifest, NULL));
366 }
367 CFReleaseSafe(manifest);
368 return digest;
369 }
370
371 SOSManifestRef SOSEngineCopyPersistedManifest(SOSEngineRef engine, CFDictionaryRef persisted, CFStringRef key) {
372 return CFRetainSafe(SOSEngineGetManifestForDigest(engine, asData(CFDictionaryGetValue(persisted, key), NULL)));
373 }
374
375 CFMutableArrayRef SOSEngineCopyPersistedManifestArray(SOSEngineRef engine, CFDictionaryRef persisted, CFStringRef key, CFErrorRef *error) {
376 CFMutableArrayRef manifests = NULL;
377 CFArrayRef digests = NULL;
378 CFDataRef digest;
379 if (asArrayOptional(CFDictionaryGetValue(persisted, key), &digests, error))
380 manifests = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
381 if (digests) CFArrayForEachC(digests, digest) {
382 SOSManifestRef manifest = SOSEngineGetManifestForDigest(engine, digest);
383 if (manifest)
384 CFArrayAppendValue(manifests, manifest);
385 }
386 return manifests;
387 }
388
389 #if !TARGET_IPHONE_SIMULATOR
390 static CFDictionaryRef SOSEngineCopyEncodedManifestCache_locked(SOSEngineRef engine, CFErrorRef *error) {
391 CFMutableDictionaryRef mfc = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
392 SOSEngineForEachPeer_locked(engine, ^(SOSPeerRef peer) {
393 SOSPeerAddManifestsInUse(peer, mfc);
394 });
395 return mfc;
396 }
397 #endif
398
399 //
400 // End of Manifest cache
401 //
402
403 //----------------------------------------------------------------------------------------
404 // MARK: Coders
405 //----------------------------------------------------------------------------------------
406
407 /*
408 Each peer has an associated coder, whcih the engine keeps track of in a
409 CFDictionary indexed by peerID. The coders are read from disk when first needed,
410 then kept in memory as SOSCoders.
411
412 N.B. Don't rollback coder in memory if a transaction is rolled back, since this
413 might lead to reuse of an IV.
414 */
415
416 static bool SOSEngineCopyCoderData(SOSEngineRef engine, CFStringRef peerID, CFDataRef *coderData, CFErrorRef *error) {
417 bool ok = true;
418 SOSCoderRef coder = (SOSCoderRef)CFDictionaryGetValue(engine->coders, peerID);
419 if (coder && (CFGetTypeID(coder) == SOSCoderGetTypeID())) {
420 CFErrorRef localError = NULL;
421 ok = *coderData = SOSCoderCopyDER(coder, &localError);
422 if (!ok) {
423 secerror("failed to der encode coder for peer %@, dropping it: %@", peerID, localError);
424 CFDictionaryRemoveValue(engine->coders, peerID);
425 CFErrorPropagate(localError, error);
426 }
427 } else {
428 *coderData = NULL;
429 }
430 return ok;
431 }
432
433 static SOSCoderRef SOSEngineGetCoderInTx_locked(SOSEngineRef engine, SOSTransactionRef txn, CFStringRef peerID, CFErrorRef *error) {
434 if (!engine->haveLoadedCoders) {
435 engine->haveLoadedCoders = SOSEngineLoadCoders(engine, txn, error);
436
437 if (!engine->haveLoadedCoders) {
438 return NULL;
439 }
440 }
441
442 SOSCoderRef coder = (SOSCoderRef)CFDictionaryGetValue(engine->coders, peerID);
443 if (!coder || (CFGetTypeID(coder) != SOSCoderGetTypeID())) {
444 SOSErrorCreate(kSOSErrorPeerNotFound, error, NULL, CFSTR("No coder for peer: %@"), peerID);
445 }
446 return coder;
447 }
448
449 static bool SOSEngineEnsureCoder_locked(SOSEngineRef engine, SOSTransactionRef txn, CFStringRef peerID, SOSFullPeerInfoRef myPeerInfo, SOSPeerInfoRef peerInfo, SOSCoderRef ourCoder, CFErrorRef *error) {
450 //have to have caused coder loading, transactions do this.
451 if (!ourCoder || !SOSCoderIsFor(ourCoder, peerInfo, myPeerInfo)) {
452 secinfo("coder", "New coder for id %@.", peerID);
453 CFErrorRef localError = NULL;
454 SOSCoderRef coder = SOSCoderCreate(peerInfo, myPeerInfo, kCFBooleanFalse, &localError);
455 if (!coder) {
456 secerror("Failed to create coder for %@: %@", peerID, localError);
457 CFErrorPropagate(localError, error);
458 return false;
459 }
460 CFDictionarySetValue(engine->coders, peerID, coder);
461 secdebug("coder", "setting coder for peerid: %@, coder: %@", peerID, coder);
462 CFReleaseNull(coder);
463 engine->codersNeedSaving = true;
464 }
465 return true;
466 }
467
468 bool SOSEngineInitializePeerCoder(SOSEngineRef engine, SOSFullPeerInfoRef myPeerInfo, SOSPeerInfoRef peerInfo, CFErrorRef *error) {
469 __block bool ok = true;
470 CFStringRef peerID = SOSPeerInfoGetPeerID(peerInfo);
471
472 ok &= SOSEngineWithPeerID(engine, peerID, error, ^(SOSPeerRef peer, SOSCoderRef coder, SOSDataSourceRef dataSource, SOSTransactionRef txn, bool *forceSaveState) {
473 ok = SOSEngineEnsureCoder_locked(engine, txn, peerID, myPeerInfo, peerInfo, coder, error);
474 *forceSaveState = ok;
475 });
476
477 return ok;
478 }
479
480 static bool SOSEngineGCPeerState_locked(SOSEngineRef engine, CFErrorRef *error) {
481 bool ok = true;
482
483 //require_quiet(ok = SOSEngineGCManifests_locked(engine, error), exit);
484
485 //exit:
486 return ok;
487 }
488 #if !TARGET_IPHONE_SIMULATOR
489 static CFMutableDictionaryRef SOSEngineCopyPeerState_locked(SOSEngineRef engine, CFErrorRef *error) {
490 CFMutableDictionaryRef peerState = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
491 CFDictionaryForEach(engine->peerMap, ^(const void *key, const void *value) {
492 CFDictionaryRef state = NULL;
493 if (value && CFGetTypeID(value) == SOSPeerGetTypeID()) {
494 CFErrorRef localError = NULL;
495 // Inflated peer
496 state = SOSPeerCopyState((SOSPeerRef)value, &localError);
497 if (!state)
498 secnotice("engine", "%@ failed to encode peer: %@", key, localError);
499 CFReleaseNull(localError);
500 // TODO: Potentially replace inflated peer with deflated peer in peerMap
501 } else if (value) {
502 // We have a deflated peer.
503 state = CFRetainSafe(value);
504 }
505
506 if (state) {
507 CFDictionarySetValue(peerState, key, state);
508 CFReleaseSafe(state);
509 }
510 });
511 return peerState;
512 }
513 #endif
514 static CFMutableDictionaryRef SOSEngineCopyPeerCoders_locked(SOSEngineRef engine, CFErrorRef *error) {
515 CFMutableDictionaryRef coders = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
516 CFDictionaryForEach(engine->peerMap, ^(const void *key, const void *value) {
517 CFDataRef coderData = NULL;
518 CFErrorRef localError = NULL;
519 bool ok = SOSEngineCopyCoderData(engine, (CFStringRef)key, &coderData, &localError);
520
521 if (!ok) {
522 secnotice("engine", "%@ no coder for peer: %@", key, localError);
523 }
524 if (ok && coderData) {
525 CFDictionarySetValue(coders, key, coderData);
526 }
527 CFReleaseNull(coderData);
528 CFReleaseNull(localError);
529 });
530 return coders;
531 }
532
533 //----------------------------------------------------------------------------------------
534 // MARK: Engine state v2 Save
535 //----------------------------------------------------------------------------------------
536
537 // Coders and keybags
538
539 static CFDataRef SOSEngineCopyCoders(SOSEngineRef engine, CFErrorRef *error) {
540 // Copy the CFDataRef version of the coders into a dictionary, which is then DER-encoded for saving
541 CFDictionaryRef coders = SOSEngineCopyPeerCoders_locked(engine, error);
542 secdebug("coders", "copying coders! %@", coders);
543 CFDataRef der = CFPropertyListCreateDERData(kCFAllocatorDefault, coders, error);
544 CFReleaseSafe(coders);
545 return der;
546 }
547
548 #pragma clang diagnostic push
549 #pragma clang diagnostic fatal "-Wshadow"
550 static bool SOSEngineSaveCoders(SOSEngineRef engine, SOSTransactionRef txn, CFErrorRef *error) {
551 // MUST hold engine lock
552 // Device must be unlocked for this to succeed
553
554 if(!engine->haveLoadedCoders){
555 secdebug("coders", "attempting to save coders before we have loaded them!");
556 }
557
558 bool ok = true;
559 if (engine->codersNeedSaving) {
560 CFDataRef derCoders = SOSEngineCopyCoders(engine, error);
561 ok = derCoders && SOSDataSourceSetStateWithKey(engine->dataSource, txn, kSOSEngineCoders,
562 kSOSEngineProtectionDomainClassA, derCoders, error);
563 if (ok) {
564 engine->codersNeedSaving = false;
565 secnotice("coder", "saved coders: %@", engine->coders);
566 }
567 CFReleaseSafe(derCoders);
568 }
569 return ok;
570 }
571 #pragma clang diagnostic pop
572
573 bool SOSTestEngineSaveCoders(CFTypeRef engine, SOSTransactionRef txn, CFErrorRef *error){
574 return SOSEngineSaveCoders((SOSEngineRef)engine, txn, error);
575 }
576 #if !TARGET_IPHONE_SIMULATOR
577
578 static CFDictionaryRef SOSEngineCopyBasicState(SOSEngineRef engine, CFErrorRef *error) {
579 // Create a version of the in-memory engine state for saving to disk
580 CFMutableDictionaryRef state = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
581 if (engine->myID)
582 CFDictionarySetValue(state, kSOSEngineIDKey, engine->myID);
583 if (engine->peerIDs)
584 CFDictionarySetValue(state, kSOSEnginePeerIDsKey, engine->peerIDs);
585 if (engine->lastTraceDate)
586 CFDictionarySetValue(state, kSOSEngineTraceDateKey, engine->lastTraceDate);
587
588 SOSPersistCFIndex(state, kSOSEngineStateVersionKey, kCurrentEngineVersion);
589 return state;
590 }
591
592 static bool SOSEngineDoSaveOneState(SOSEngineRef engine, SOSTransactionRef txn, CFStringRef key, CFStringRef pdmn,
593 CFDictionaryRef state, CFErrorRef *error) {
594 CFDataRef derState = CFPropertyListCreateDERData(kCFAllocatorDefault, state, error);
595 bool ok = derState && SOSDataSourceSetStateWithKey(engine->dataSource, txn, key, pdmn, derState, error);
596 CFReleaseSafe(derState);
597 return ok;
598 }
599
600 static bool SOSEngineDoSave(SOSEngineRef engine, SOSTransactionRef txn, CFErrorRef *error) {
601 bool ok = true;
602
603 CFDictionaryRef state = SOSEngineCopyBasicState(engine, error);
604 ok &= state && SOSEngineDoSaveOneState(engine, txn, kSOSEngineStatev2, kSOSEngineProtectionDomainClassD, state, error);
605 CFReleaseNull(state);
606
607 state = SOSEngineCopyPeerState_locked(engine, error);
608 ok &= state && SOSEngineDoSaveOneState(engine, txn, kSOSEnginePeerStates, kSOSEngineProtectionDomainClassD, state, error);
609 CFReleaseNull(state);
610
611 state = SOSEngineCopyEncodedManifestCache_locked(engine, error);
612 ok &= state && SOSEngineDoSaveOneState(engine, txn, kSOSEngineManifestCache, kSOSEngineProtectionDomainClassD, state, error);
613 CFReleaseNull(state);
614
615 ok &= SOSEngineSaveCoders(engine, txn, error);
616
617 SOSEngineDeleteV0State(engine, txn, NULL);
618
619 return ok;
620 }
621 #endif
622
623 static bool SOSEngineSave(SOSEngineRef engine, SOSTransactionRef txn, CFErrorRef *error) {
624 // Don't save engine state from tests
625 if (!engine->dataSource)
626 return true;
627 #if !TARGET_IPHONE_SIMULATOR
628 return SOSEngineDoSave(engine, txn, error);
629 #endif
630 return true;
631 }
632
633 //----------------------------------------------------------------------------------------
634 // MARK: Engine state v2 Load/Restore
635 //----------------------------------------------------------------------------------------
636
637 // Restore the in-memory state of engine from saved state loaded from the db
638 static bool SOSEngineSetManifestCacheWithDictionary(SOSEngineRef engine, CFDictionaryRef manifestCache, CFErrorRef *error) {
639 __block bool ok = true;
640 CFReleaseNull(engine->manifestCache);
641 if (manifestCache) {
642 engine->manifestCache = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
643 CFDictionaryForEach(manifestCache, ^(const void *key, const void *value) {
644 CFDataRef data = (CFDataRef)value;
645 if (isData(data)) {
646 SOSManifestRef mf = SOSManifestCreateWithData(data, NULL);
647 if (mf)
648 CFDictionarySetValue(engine->manifestCache, key, mf);
649 CFReleaseSafe(mf);
650 }
651 });
652 }
653
654 return ok;
655 }
656
657 static bool SOSEngineUpdateStateWithDictionary(SOSEngineRef engine, CFDictionaryRef stateDict, CFErrorRef *error) {
658 bool ok = true;
659 #if 0
660 if (stateDict) {
661 // If kCurrentEngineVersion > 2, uncomment and fill in code below
662 CFIndex engineVersion = 0 ;
663 bool versionPresent = SOSPeerGetOptionalPersistedCFIndex(stateDict, kSOSEngineStateVersionKey, &engineVersion);
664 if (versionPresent && (engineVersion != kCurrentEngineVersion)) {
665 // need migration
666 }
667 }
668 #endif
669 return ok;
670 }
671
672 static bool SOSEngineSetStateWithDictionary(SOSEngineRef engine, CFDictionaryRef stateDict, CFErrorRef *error) {
673 bool ok = true;
674 if (stateDict) {
675 SOSEngineUpdateStateWithDictionary(engine, stateDict, error);
676 CFRetainAssign(engine->myID, asString(CFDictionaryGetValue(stateDict, kSOSEngineIDKey), NULL));
677 CFRetainAssign(engine->peerIDs, asArray(CFDictionaryGetValue(stateDict, kSOSEnginePeerIDsKey), NULL));
678 CFRetainAssign(engine->lastTraceDate, asDate(CFDictionaryGetValue(stateDict, kSOSEngineTraceDateKey), NULL));
679
680 }
681 secnotice("engine", "%@", engine);
682 return ok;
683 }
684
685 static bool SOSEngineSetPeerStateWithDictionary(SOSEngineRef engine, CFDictionaryRef peerStateDict, CFErrorRef *error) {
686 // Set the in-memory peer state using the dictionary version of the DER-encoded version from disk
687 CFMutableArrayRef untrustedPeers = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
688 CFMutableArrayRef trustedPeersMetas = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
689 SOSEngineApplyPeerState(engine, asDictionary(peerStateDict, NULL));
690 SOSEngineSynthesizePeerMetas(engine, trustedPeersMetas, untrustedPeers);
691 SOSEngineSetPeers_locked(engine, engine->myID, trustedPeersMetas, untrustedPeers);
692 CFReleaseNull(trustedPeersMetas);
693 CFReleaseNull(untrustedPeers);
694 return true;
695 }
696
697 CFMutableDictionaryRef derStateToDictionaryCopy(CFDataRef state, CFErrorRef *error) {
698 bool ok = true;
699 CFMutableDictionaryRef stateDict = NULL;
700 if (state) {
701 const uint8_t *der = CFDataGetBytePtr(state);
702 const uint8_t *der_end = der + CFDataGetLength(state);
703 ok = der = der_decode_dictionary(kCFAllocatorDefault, kCFPropertyListMutableContainers, (CFDictionaryRef *)&stateDict, error, der, der_end);
704 if (der && der != der_end) {
705 ok = SOSErrorCreate(kSOSErrorDecodeFailure, error, NULL, CFSTR("trailing %td bytes at end of state"), der_end - der);
706 }
707 if (!ok) {
708 CFReleaseNull(stateDict);
709 }
710 }
711 return stateDict;
712 }
713 bool TestSOSEngineLoadCoders(CFTypeRef engine, SOSTransactionRef txn, CFErrorRef *error)
714 {
715 return SOSEngineLoadCoders((SOSEngineRef)engine, txn, error);
716 }
717
718 static bool SOSEngineLoadCoders(SOSEngineRef engine, SOSTransactionRef txn, CFErrorRef *error) {
719 // Read the serialized engine state from the datasource (aka keychain) and populate the in-memory engine
720 __block bool needPeerRegistration = false;
721 bool ok = true;
722 CFDataRef derCoders = NULL;
723 CFMutableDictionaryRef codersDict = NULL;
724 derCoders = SOSDataSourceCopyStateWithKey(engine->dataSource, kSOSEngineCoders, kSOSEngineProtectionDomainClassA, txn, error);
725 require_quiet(derCoders, xit);
726 codersDict = derStateToDictionaryCopy(derCoders, error);
727 require_quiet(codersDict, xit);
728
729 /*
730 * Make sure all peer have coders
731 */
732 CFDictionaryForEach(engine->peerMap, ^(const void *peerID, const void *peerState) {
733 /*
734 * Skip backup peer since they will never have coders
735 */
736 if (isString(peerID) && CFStringHasSuffix(peerID, CFSTR("-tomb"))) {
737 secnotice("coder", "Skipping coder check for peer: %@", peerID);
738 return;
739 }
740
741 CFTypeRef coderRef = CFDictionaryGetValue(codersDict, peerID);
742 if (coderRef) {
743 CFDataRef coderData = asData(coderRef, NULL);
744 if (coderData) {
745 CFErrorRef createError = NULL;
746 SOSCoderRef coder = SOSCoderCreateFromData(coderData, &createError);
747 if (coder) {
748 CFDictionaryAddValue(engine->coders, peerID, coder);
749 secnotice("coder", "adding coder: %@ for peerid: %@", coder, peerID);
750 } else {
751 secnotice("coder", "Coder for '%@' failed to create: %@", peerID, createError);
752 }
753 CFReleaseNull(createError);
754 CFReleaseNull(coder);
755 } else {
756 // Needed a coder, didn't find one, notify the account to help us out.
757 // Next attempt to sync will fix this
758 secnotice("coder", "coder for %@ was not cf data: %@", peerID, coderData);
759 needPeerRegistration = true;
760 }
761 } else{
762 secnotice("coder", "didn't find coder for peer: %@ engine dictionary: %@", peerID, codersDict);
763 needPeerRegistration = true;
764 }
765 });
766
767 secnotice("coder", "Will force peer registration: %s",needPeerRegistration ? "yes" : "no");
768
769 if (needPeerRegistration) {
770 dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
771
772 dispatch_async(queue, ^{
773 CFErrorRef eprError = NULL;
774 if (!SOSCCProcessEnsurePeerRegistration_Server(&eprError)) {
775 secnotice("coder", "SOSCCProcessEnsurePeerRegistration failed with: %@", eprError);
776 }
777 CFReleaseNull(eprError);
778 });
779 }
780
781 engine->haveLoadedCoders = true;
782
783 xit:
784 CFReleaseNull(derCoders);
785 CFReleaseNull(codersDict);
786 return ok;
787 }
788 #if !TARGET_IPHONE_SIMULATOR
789 static bool SOSEngineDeleteV0State(SOSEngineRef engine, SOSTransactionRef txn, CFErrorRef *error) {
790 // SOSDataSourceDeleteStateWithKey(engine->dataSource, kSOSEngineState, kSOSEngineProtectionDomainClassD, txn, error);
791
792 // Create effectively empty state until delete is working
793 CFMutableDictionaryRef state = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
794 if (engine->myID)
795 CFDictionarySetValue(state, kSOSEngineIDKey, engine->myID);
796 CFDataRef derState = CFPropertyListCreateDERData(kCFAllocatorDefault, state, error);
797 CFReleaseNull(state);
798
799 bool ok = derState && SOSDataSourceSetStateWithKey(engine->dataSource, txn, kSOSEngineState, kSOSEngineProtectionDomainClassD, derState, error);
800 CFReleaseSafe(derState);
801 return ok;
802 }
803 #endif
804 static bool SOSEngineLoad(SOSEngineRef engine, SOSTransactionRef txn, CFErrorRef *error) {
805 // Read the serialized engine state from the datasource (aka keychain) and populate the in-memory engine
806 bool ok = true;
807 CFDataRef basicEngineState = NULL;
808 CFMutableDictionaryRef engineState = NULL;
809 CFDictionaryRef manifestCache = NULL;
810 CFDictionaryRef peerStateDict = NULL;
811 CFMutableDictionaryRef codersDict = NULL;
812 // Look for the v2 engine state first
813 basicEngineState = SOSDataSourceCopyStateWithKey(engine->dataSource, kSOSEngineStatev2, kSOSEngineProtectionDomainClassD, txn, error);
814 if (basicEngineState) {
815 CFDataRef data = NULL;
816 engineState = derStateToDictionaryCopy(basicEngineState, error);
817
818 data = SOSDataSourceCopyStateWithKey(engine->dataSource, kSOSEngineManifestCache, kSOSEngineProtectionDomainClassD, txn, error);
819 manifestCache = derStateToDictionaryCopy(data, error);
820 CFReleaseNull(data);
821
822 data = SOSDataSourceCopyStateWithKey(engine->dataSource, kSOSEnginePeerStates, kSOSEngineProtectionDomainClassD, txn, error);
823 peerStateDict = derStateToDictionaryCopy(data, error);
824 CFReleaseNull(data);
825 } else {
826 // Look for original V0 engine state next
827 CFDataRef v0EngineStateData = SOSDataSourceCopyStateWithKey(engine->dataSource, kSOSEngineState, kSOSEngineProtectionDomainClassD, txn, error);
828 if (v0EngineStateData) {
829 engineState = derStateToDictionaryCopy(v0EngineStateData, error);
830 if (engineState) {
831 manifestCache = CFRetainSafe(asDictionary(CFDictionaryGetValue(engineState, kSOSEngineManifestCacheKey), NULL));
832 peerStateDict = CFRetainSafe(asDictionary(CFDictionaryGetValue(engineState, kSOSEnginePeerStateKey), NULL));
833 }
834 CFReleaseNull(v0EngineStateData);
835 }
836 secnotice("coder", "Migrating from v0 engine state; dropping coders and forcing re-negotiation");
837 SOSCCEnsurePeerRegistration();
838
839 if (engine->peerIDs) {
840 SOSCCRequestSyncWithPeersList(engine->peerIDs);
841 }
842 }
843
844 ok = engineState && SOSEngineSetStateWithDictionary(engine, engineState, error);
845
846 ok &= SOSEngineSetManifestCacheWithDictionary(engine, manifestCache, error);
847
848 ok &= peerStateDict && SOSEngineSetPeerStateWithDictionary(engine, peerStateDict, error);
849
850 CFReleaseSafe(basicEngineState);
851 CFReleaseSafe(engineState);
852 CFReleaseSafe(manifestCache);
853 CFReleaseSafe(peerStateDict);
854 CFReleaseSafe(codersDict);
855 return ok;
856 }
857
858 bool SOSTestEngineSaveWithDER(SOSEngineRef engine, CFDataRef derState, CFErrorRef *error) {
859 assert(true);
860 return true;
861 }
862
863 bool SOSTestEngineSave(SOSEngineRef engine, SOSTransactionRef txn, CFErrorRef *error) {
864 bool bx = SOSEngineSave(engine, txn, error);
865 secnotice("test", "saved engine: %@", engine);
866 return bx;
867 }
868
869 bool SOSTestEngineLoad(SOSEngineRef engine, SOSTransactionRef txn, CFErrorRef *error) {
870 bool bx = SOSEngineLoad(engine, txn, error);
871 secnotice("test", "loaded engine: %@", engine);
872 return bx;
873 }
874
875 //----------------------------------------------------------------------------------------
876 // MARK: Change Trackers and Peer Manifests
877 //----------------------------------------------------------------------------------------
878
879 static SOSManifestRef SOSEngineCreateManifestWithViewNameSet_locked(SOSEngineRef engine, CFSetRef viewNameSet, CFErrorRef *error) {
880 // TODO: Potentially tell all changeTrackers to track manifests ( //forall ct do SOSChangeTrackerSetConcrete(ct, true);
881 // and read the entire dataSource and pass all objects though the filter here, instead of
882 // forcing the datasource to be able to do "smart" queries
883 return SOSDataSourceCopyManifestWithViewNameSet(engine->dataSource, viewNameSet, error);
884 }
885
886 static SOSChangeTrackerRef SOSEngineCopyChangeTrackerWithViewNameSet_locked(SOSEngineRef engine, CFSetRef viewNameSet, CFErrorRef *error) {
887 SOSChangeTrackerRef ct = (SOSChangeTrackerRef)CFDictionaryGetValue(engine->viewNameSet2ChangeTracker, viewNameSet);
888 if (!ct)
889 SOSErrorCreate(kSOSErrorPeerNotFound, error, NULL, CFSTR("no change tracker for view set %@"), viewNameSet);
890 return CFRetainSafe(ct);
891 }
892
893 static SOSManifestRef SOSEngineCopyManifestWithViewNameSet_locked(SOSEngineRef engine, CFSetRef viewNameSet, CFErrorRef *error) {
894 SOSChangeTrackerRef ct = SOSEngineCopyChangeTrackerWithViewNameSet_locked(engine, viewNameSet, error);
895 if (!ct)
896 return NULL;
897
898 SOSManifestRef manifest = SOSChangeTrackerCopyManifest(ct, NULL);
899 if (!manifest) {
900 manifest = SOSEngineCreateManifestWithViewNameSet_locked(engine, viewNameSet, error); // Do the SQL query
901 SOSChangeTrackerSetManifest(ct, manifest);
902 }
903 CFReleaseSafe(ct);
904 return manifest;
905 }
906
907 SOSManifestRef SOSEngineCopyLocalPeerManifest_locked(SOSEngineRef engine, SOSPeerRef peer, CFErrorRef *error) {
908 return SOSEngineCopyManifestWithViewNameSet_locked(engine, SOSPeerGetViewNameSet(peer), error);
909 }
910
911 #define withViewAndBackup(VIEW) do { with(VIEW); if (!isTomb) with(VIEW ## _tomb); } while(0)
912
913
914 // Invoke with once for each view an object is in.
915 // TODO: Move this function into the DataSource
916 static void SOSEngineObjectWithView(SOSEngineRef engine, SOSObjectRef object, void (^with)(CFStringRef view)) {
917 // Filter items into v0 only view here
918 SecDbItemRef item = (SecDbItemRef)object; // TODO: Layer violation, breaks tests
919 if (isDictionary(object)) {
920 CFTypeRef isTombValue = CFDictionaryGetValue((CFDictionaryRef)object, kSecAttrTombstone);
921 bool isTomb = isTombValue && CFBooleanGetValue(isTombValue);
922 // We are in the test just assume v0 and v2 views.
923 withViewAndBackup(kSOSViewKeychainV0);
924 } else if (SecDbItemIsSyncableOrCorrupted(item)) {
925 const SecDbClass *iclass = SecDbItemGetClass(item);
926 CFTypeRef pdmn = SecDbItemGetCachedValueWithName(item, kSecAttrAccessible);
927 if ((iclass == genp_class() || iclass == inet_class() || iclass == keys_class() || iclass == cert_class())
928 && isString(pdmn)
929 && (CFEqual(pdmn, kSecAttrAccessibleWhenUnlocked)
930 || CFEqual(pdmn, kSecAttrAccessibleAfterFirstUnlock)
931 || CFEqual(pdmn, kSecAttrAccessibleAlwaysPrivate)
932 || CFEqual(pdmn, kSecAttrAccessibleWhenUnlockedThisDeviceOnly)
933 || CFEqual(pdmn, kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly)
934 || CFEqual(pdmn, kSecAttrAccessibleAlwaysThisDeviceOnlyPrivate)))
935 {
936 CFTypeRef tomb = SecDbItemGetCachedValueWithName(item, kSecAttrTombstone);
937 char cvalue = 0;
938 bool isTomb = (isNumber(tomb) && CFNumberGetValue(tomb, kCFNumberCharType, &cvalue) && cvalue == 1);
939 CFTypeRef viewHint = SecDbItemGetCachedValueWithName(item, kSecAttrSyncViewHint);
940
941 // Intecept CKKS-handled items here and short-circuit function
942 if(SOSViewHintInCKKSSystem(viewHint)) {
943 return;
944 }
945
946 if (viewHint == NULL) {
947 if (iclass == cert_class()) {
948 withViewAndBackup(kSOSViewOtherSyncable);
949 } else {
950 if (!SecDbItemGetCachedValueWithName(item, kSecAttrTokenID)) {
951 withViewAndBackup(kSOSViewKeychainV0);
952 }
953 CFTypeRef agrp = SecDbItemGetCachedValueWithName(item, kSecAttrAccessGroup);
954 if (iclass == keys_class() && CFEqualSafe(agrp, CFSTR("com.apple.security.sos"))) {
955 withViewAndBackup(kSOSViewiCloudIdentity);
956 } else if (CFEqualSafe(agrp, CFSTR("com.apple.cfnetwork"))) {
957 withViewAndBackup(kSOSViewAutofillPasswords);
958 } else if (CFEqualSafe(agrp, CFSTR("com.apple.safari.credit-cards"))) {
959 withViewAndBackup(kSOSViewSafariCreditCards);
960 } else if (iclass == genp_class()) {
961 if (CFEqualSafe(agrp, CFSTR("apple")) &&
962 CFEqualSafe(SecDbItemGetCachedValueWithName(item, kSecAttrService), CFSTR("AirPort"))) {
963 withViewAndBackup(kSOSViewWiFi);
964 } else if (CFEqualSafe(agrp, CFSTR("com.apple.sbd"))) {
965 withViewAndBackup(kSOSViewBackupBagV0);
966 } else {
967 withViewAndBackup(kSOSViewOtherSyncable); // (genp)
968 }
969 } else {
970 withViewAndBackup(kSOSViewOtherSyncable); // (inet || keys)
971 }
972 }
973 } else {
974 with(viewHint);
975 if (!isTomb) {
976 CFStringRef viewHintTomb = CFStringCreateWithFormat(kCFAllocatorDefault, NULL, CFSTR("%@-tomb"), viewHint);
977 if (viewHintTomb) {
978 with(viewHintTomb);
979 CFRelease(viewHintTomb);
980 }
981 }
982 }
983 }
984 } else {
985 // TODO: general queries
986 #if 0
987 SOSViewRef view;
988 CFArrayForEachC(engine->views, view) {
989 bool inView = SOSViewQueryMatchItem(view, item);
990 if (inView) {
991 CFStringRef viewName = SOSViewCopyName(view);
992 with(viewName);
993 CFReleaseSafe(viewName);
994 }
995 }
996 #endif
997 }
998 }
999
1000 //
1001 // Deliver delayed notifiations of changes in keychain
1002 //
1003
1004 static void
1005 SOSSendViewNotification(CFSetRef viewNotifications)
1006 {
1007 CFNotificationCenterRef center = CFNotificationCenterGetDarwinNotifyCenter();
1008
1009 CFSetForEach(viewNotifications, ^(const void *value) {
1010 secinfo("view", "Sending view notification for view %@", value);
1011
1012 CFStringRef str = CFStringCreateWithFormat(NULL, NULL, CFSTR("com.apple.security.view-change.%@"), value);
1013 if (str == NULL)
1014 return;
1015
1016 CFNotificationCenterPostNotificationWithOptions(center, str, NULL, NULL, 0);
1017 CFRelease(str);
1018
1019 });
1020 }
1021
1022 static void
1023 SOSArmViewNotificationEvents(CFSetRef viewNotifications)
1024 {
1025 static CFMutableSetRef pendingViewNotifications;
1026 static dispatch_once_t onceToken;
1027 static dispatch_queue_t queue;
1028
1029 dispatch_once(&onceToken, ^{
1030 queue = dispatch_queue_create("ViewNotificationQueue", NULL);
1031 });
1032 if (queue == NULL || CFSetGetCount(viewNotifications) == 0)
1033 return;
1034
1035 /*
1036 * PendingViewNotifications is only modified on queue.
1037 * PendingViewNotifications is used as a signal if a timer is running.
1038 *
1039 * If a timer is running, new events are just added to the existing
1040 * pendingViewNotifications.
1041 */
1042
1043 #define DELAY_OF_NOTIFICATION_IN_NS (NSEC_PER_SEC)
1044
1045 CFRetain(viewNotifications);
1046
1047 dispatch_async(queue, ^{
1048 if (pendingViewNotifications == NULL) {
1049 pendingViewNotifications = CFSetCreateMutableCopy(NULL, 0, viewNotifications);
1050
1051 dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)DELAY_OF_NOTIFICATION_IN_NS), queue, ^{
1052 SOSSendViewNotification(pendingViewNotifications);
1053
1054 // when timer hits, clear out set of modified views
1055 CFRelease(pendingViewNotifications);
1056 pendingViewNotifications = NULL;
1057 });
1058 } else {
1059 CFSetUnion(pendingViewNotifications, viewNotifications);
1060 }
1061 CFRelease(viewNotifications);
1062 });
1063 }
1064
1065
1066 //
1067 // SOSChangeMapper - Helper for SOSEngineUpdateChanges_locked
1068 //
1069 struct SOSChangeMapper {
1070 SOSEngineRef engine;
1071 SOSTransactionRef txn;
1072 SOSDataSourceTransactionPhase phase;
1073 SOSDataSourceTransactionSource source;
1074 CFMutableDictionaryRef ct2changes;
1075 CFMutableSetRef viewNotifications;
1076 };
1077
1078 static void SOSChangeMapperInit(struct SOSChangeMapper *cm, SOSEngineRef engine, SOSTransactionRef txn, SOSDataSourceTransactionPhase phase, SOSDataSourceTransactionSource source) {
1079 cm->engine = engine;
1080 cm->txn = txn;
1081 cm->phase = phase;
1082 cm->source = source;
1083 cm->ct2changes = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
1084 cm->viewNotifications = CFSetCreateMutableForCFTypes(kCFAllocatorDefault);
1085 }
1086
1087 static void SOSChangeMapperSendNotifications(struct SOSChangeMapper *cm)
1088 {
1089 SOSArmViewNotificationEvents(cm->viewNotifications);
1090 }
1091
1092 static void SOSChangeMapperFree(struct SOSChangeMapper *cm) {
1093 CFReleaseSafe(cm->ct2changes);
1094 CFReleaseSafe(cm->viewNotifications);
1095 }
1096
1097 static void SOSChangeMapperAddViewNotification(struct SOSChangeMapper *cm, CFStringRef view)
1098 {
1099 assert(isString(view));
1100
1101 // aggregate the PCS view into one notification
1102 if (CFStringHasPrefix(view, CFSTR("PCS-"))) {
1103 view = CFSTR("PCS");
1104 }
1105 CFSetSetValue(cm->viewNotifications, view);
1106 }
1107
1108 static void SOSChangeMapperAppendObject(struct SOSChangeMapper *cm, SOSChangeTrackerRef ct, bool isAdd, CFTypeRef object) {
1109 CFMutableArrayRef changes = (CFMutableArrayRef)CFDictionaryGetValue(cm->ct2changes, ct);
1110 if (!changes) {
1111 changes = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
1112 CFDictionarySetValue(cm->ct2changes, ct, changes);
1113 CFReleaseSafe(changes);
1114 }
1115 isAdd ? SOSChangesAppendAdd(changes, object) : SOSChangesAppendDelete(changes, object);
1116 }
1117
1118 static bool SOSChangeMapperIngestChange(struct SOSChangeMapper *cm, bool isAdd, CFTypeRef change) {
1119 bool someoneCares = false;
1120 if (isData(change)) {
1121 // TODO: Reenable assertion once the tests have been updated
1122 //assert(!isAdd);
1123 // We got a digest for a deleted object. Our dataSource probably couldn't find
1124 // an object with this digest, probably because it went missing, or it was
1125 // discovered to be corrupted.
1126 // Tell all our changeTrackers about this digest since we don't know who might need it.
1127 CFDictionaryForEach(cm->engine->viewNameSet2ChangeTracker, ^(const void *viewNameSet, const void *ct) {
1128 SOSChangeMapperAppendObject(cm, (SOSChangeTrackerRef)ct, isAdd, change);
1129 });
1130 someoneCares = CFDictionaryGetCount(cm->engine->viewNameSet2ChangeTracker);
1131 } else {
1132 // We got an object let's figure out which views it's in and schedule it for
1133 // delivery to all changeTrackers interested in any of those views.
1134 SOSObjectRef object = (SOSObjectRef)change;
1135 CFMutableSetRef changeTrackerSet = CFSetCreateMutableForCFTypes(kCFAllocatorDefault);
1136 // First gather all the changeTrackers interested in this object (eliminating dupes by collecting them in a set)
1137 SOSEngineObjectWithView(cm->engine, object, ^(CFStringRef viewName) {
1138 const void *ctorset = CFDictionaryGetValue(cm->engine->viewName2ChangeTracker, viewName);
1139 if (isSet(ctorset)) {
1140 CFSetForEach((CFSetRef)ctorset, ^(const void *ct) { CFSetAddValue(changeTrackerSet, ct); });
1141 } else if (ctorset) {
1142 CFSetAddValue(changeTrackerSet, ctorset);
1143 }
1144
1145
1146 SOSChangeMapperAddViewNotification(cm, viewName);
1147 });
1148 // Then append the object to the changes array in the ct2changes dictionary keyed by viewSet
1149 CFSetForEach(changeTrackerSet, ^(const void *ct) {
1150 SOSChangeMapperAppendObject(cm, (SOSChangeTrackerRef)ct, isAdd, object);
1151 });
1152 someoneCares = CFSetGetCount(changeTrackerSet);
1153 CFReleaseSafe(changeTrackerSet);
1154 }
1155 return someoneCares;
1156 }
1157
1158 static bool SOSChangeMapperSend(struct SOSChangeMapper *cm, CFErrorRef *error) {
1159 __block bool ok = true;
1160 CFDictionaryForEach(cm->ct2changes, ^(const void *ct, const void *changes) {
1161 ok &= SOSChangeTrackerTrackChanges((SOSChangeTrackerRef)ct, cm->engine, cm->txn, cm->source, cm->phase, (CFArrayRef)changes, error);
1162 });
1163 return ok;
1164 }
1165
1166 static bool SOSEngineUpdateChanges_locked(SOSEngineRef engine, SOSTransactionRef txn, SOSDataSourceTransactionPhase phase, SOSDataSourceTransactionSource source, CFArrayRef changes, CFErrorRef *error)
1167 {
1168 secnoticeq("engine", "%@: %s %s %ld changes, txn=%@, %p", engine->myID, phase == kSOSDataSourceTransactionWillCommit ? "will-commit" : phase == kSOSDataSourceTransactionDidCommit ? "did-commit" : "did-rollback",
1169 source == kSOSDataSourceSOSTransaction ? "sos" :
1170 source == kSOSDataSourceCKKSTransaction ? "ckks" :
1171 source == kSOSDataSourceAPITransaction ? "api" :
1172 "unknown",
1173 CFArrayGetCount(changes), txn, txn);
1174 bool ok = true;
1175 switch (phase) {
1176 case kSOSDataSourceTransactionDidRollback:
1177 ok &= SOSEngineLoad(engine, txn, error);
1178 break;
1179 case kSOSDataSourceTransactionDidCommit: // Corruption causes us to process items at DidCommit
1180 case kSOSDataSourceTransactionWillCommit:
1181 {
1182 bool mappedItemChanged = false;
1183
1184 struct SOSChangeMapper cm;
1185 SOSChangeMapperInit(&cm, engine, txn, phase, source);
1186 SecDbEventRef event;
1187 CFArrayForEachC(changes, event) {
1188 CFTypeRef deleted = NULL;
1189 CFTypeRef inserted = NULL;
1190 SecDbEventGetComponents(event, &deleted, &inserted, error);
1191 if (deleted) {
1192 bool someoneCares = SOSChangeMapperIngestChange(&cm, false, deleted);
1193 if (someoneCares) {
1194 #if TARGET_OS_EMBEDDED
1195 SecADAddValueForScalarKey(CFSTR("com.apple.security.sos.delete"), 1);
1196 #endif
1197 mappedItemChanged = true;
1198 }
1199 }
1200 if (inserted) {
1201 bool someoneCares = SOSChangeMapperIngestChange(&cm, true, inserted);
1202 if (someoneCares) {
1203 #if TARGET_OS_EMBEDDED
1204 if (deleted == NULL) {
1205 SecADAddValueForScalarKey(CFSTR("com.apple.security.sos.add"), 1);
1206 } else {
1207 SecADAddValueForScalarKey(CFSTR("com.apple.security.sos.update"), 1);
1208 }
1209 #endif
1210 mappedItemChanged = true;
1211 }
1212 if (!someoneCares && !isData(inserted) && SecDbItemIsTombstone((SecDbItemRef)inserted) && !CFEqualSafe(SecDbItemGetValue((SecDbItemRef)inserted, &v7utomb, NULL), kCFBooleanTrue)) {
1213 CFErrorRef localError = NULL;
1214 // A tombstone was inserted but there is no changetracker that
1215 // cares about it.
1216 if (!SecDbItemDoDeleteSilently((SecDbItemRef)inserted, (SecDbConnectionRef)txn, &localError)) {
1217 secerror("failed to delete tombstone %@ that no one cares about: %@", inserted, localError);
1218 CFReleaseNull(localError);
1219 }
1220 }
1221 }
1222 }
1223
1224 ok &= SOSChangeMapperSend(&cm, error);
1225 SOSChangeMapperSendNotifications(&cm); // Trigger notifications for view that changes changed
1226 SOSChangeMapperFree(&cm);
1227
1228 if (ok && phase == kSOSDataSourceTransactionWillCommit) {
1229 // Only consider writing if we're in the WillCommit phase.
1230 // DidCommit phases happen outside the database lock and
1231 // writing to the DBConn will cause deadlocks.
1232 if (mappedItemChanged || source == kSOSDataSourceSOSTransaction) {
1233 // Write SOSEngine and SOSPeer state to disk
1234 #if OCTAGON
1235 if(!SecCKKSTestDisableSOS()) {
1236 #endif
1237 secnotice("engine", "saving engine state");
1238 ok &= SOSEngineSave(engine, txn, error);
1239
1240 if (kSOSDataSourceAPITransaction == source || kSOSDataSourceCKKSTransaction == source)
1241 SOSCCRequestSyncWithPeersList(engine->peerIDs);
1242 #if OCTAGON
1243 }
1244 #endif
1245 } else {
1246 secinfo("engine", "Not saving engine state, nothing changed.");
1247 }
1248 }
1249
1250 break;
1251 }
1252 }
1253 return ok;
1254 }
1255
1256 static void SOSEngineSetNotifyPhaseBlock(SOSEngineRef engine) {
1257 SOSDataSourceAddNotifyPhaseBlock(engine->dataSource, ^(SOSDataSourceRef ds, SOSTransactionRef txn, SOSDataSourceTransactionPhase phase, SOSDataSourceTransactionSource source, CFArrayRef changes) {
1258 dispatch_sync(engine->queue, ^{
1259 CFErrorRef localError = NULL;
1260 if (!SOSEngineUpdateChanges_locked(engine, txn, phase, source, changes, &localError)) {
1261 secerror("updateChanged failed: %@", localError);
1262 }
1263 CFReleaseSafe(localError);
1264 });
1265 });
1266 }
1267
1268 #if 0 // TODO: update these checks
1269 static void SOSEngineCircleChanged_sanitycheck(SOSEngineRef engine, CFStringRef myPeerID, CFArrayRef trustedPeers, CFArrayRef untrustedPeers) {
1270 // Logging code
1271 CFMutableArrayRef addedPeers = CFArrayCreateDifference(kCFAllocatorDefault, trustedPeers, engine->peerIDs);
1272 CFMutableArrayRef deletedPeers = CFArrayCreateDifference(kCFAllocatorDefault, engine->peerIDs, trustedPeers);
1273 CFMutableArrayRef addedUntrustedPeers = CFArrayCreateDifference(kCFAllocatorDefault, untrustedPeers, engine->peerIDs);
1274 CFMutableArrayRef deletedUntrustedPeers = CFArrayCreateDifference(kCFAllocatorDefault, engine->peerIDs, untrustedPeers);
1275
1276 CFStringRef tpDesc = SOSPeerIDArrayCreateString(trustedPeers);
1277 CFStringRef apDesc = SOSPeerIDArrayCreateString(addedPeers);
1278 CFStringRef dpDesc = SOSPeerIDArrayCreateString(deletedPeers);
1279 CFStringRef aupDesc = SOSPeerIDArrayCreateString(addedUntrustedPeers);
1280 CFStringRef dupDesc = SOSPeerIDArrayCreateString(deletedUntrustedPeers);
1281 secnotice("engine", "trusted %@ added %@ removed %@ add ut: %@ rem ut: %@", tpDesc, apDesc, dpDesc, aupDesc, dupDesc);
1282 CFReleaseSafe(dupDesc);
1283 CFReleaseSafe(aupDesc);
1284 CFReleaseSafe(dpDesc);
1285 CFReleaseSafe(apDesc);
1286 CFReleaseSafe(tpDesc);
1287
1288 // Assertions:
1289 // Ensure SOSAccount isn't giving us the runaround.
1290 // Assert that trustedPeers, untrustedPeers and myPeerId are disjoint sets
1291 if (trustedPeers) {
1292 CFMutableArrayRef allTrustedPeers = CFArrayCreateDifference(kCFAllocatorDefault, trustedPeers, untrustedPeers);
1293 assert(CFEqual(trustedPeers, allTrustedPeers));
1294 CFReleaseSafe(allTrustedPeers);
1295 assert(!CFArrayContainsValue(trustedPeers, CFRangeMake(0, CFArrayGetCount(trustedPeers)), myPeerID));
1296 }
1297 if (untrustedPeers) {
1298 CFMutableArrayRef allUntrustedPeers = CFArrayCreateDifference(kCFAllocatorDefault, untrustedPeers, trustedPeers);
1299 assert(CFEqual(untrustedPeers, allUntrustedPeers));
1300 CFReleaseSafe(allUntrustedPeers);
1301 assert(!CFArrayContainsValue(untrustedPeers, CFRangeMake(0, CFArrayGetCount(trustedPeers)), myPeerID));
1302 }
1303
1304 CFReleaseNull(deletedUntrustedPeers);
1305 CFReleaseNull(addedUntrustedPeers);
1306 CFReleaseNull(deletedPeers);
1307 CFReleaseNull(addedPeers);
1308
1309 // End of logging and asertions, actual code here.
1310 }
1311 #endif
1312
1313 static SOSChangeTrackerRef SOSReferenceAndGetChangeTracker(CFDictionaryRef lookup, CFMutableDictionaryRef referenced, CFSetRef viewNameSet) {
1314 SOSChangeTrackerRef ct = (SOSChangeTrackerRef)CFDictionaryGetValue(referenced, viewNameSet);
1315 if (!ct) {
1316 ct = (SOSChangeTrackerRef)CFDictionaryGetValue(lookup, viewNameSet);
1317 if (ct) {
1318 SOSChangeTrackerResetRegistration(ct);
1319 CFDictionarySetValue(referenced, viewNameSet, ct);
1320 } else {
1321 ct = SOSChangeTrackerCreate(kCFAllocatorDefault, false, NULL, NULL);
1322 CFDictionarySetValue(referenced, viewNameSet, ct);
1323 CFReleaseSafe(ct);
1324 }
1325 }
1326 return ct;
1327 }
1328
1329 static void CFStringAppendPeerIDAndViews(CFMutableStringRef desc, CFStringRef peerID, CFSetRef vns) {
1330 CFStringSetPerformWithDescription(vns, ^(CFStringRef description) {
1331 CFStringAppendFormat(desc, NULL, CFSTR(" %@ (%@)"), peerID, description);
1332 });
1333 }
1334
1335 // Must be called after updating viewNameSet2ChangeTracker
1336 static void SOSEngineUpdateViewName2ChangeTracker(SOSEngineRef engine) {
1337 // Create the mapping from viewName -> ChangeTracker used for lookup during change notification
1338 CFMutableDictionaryRef newViewName2ChangeTracker = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
1339 CFDictionaryForEach(engine->viewNameSet2ChangeTracker, ^(const void *viewNameSet, const void *ct) {
1340 CFSetForEach(viewNameSet, ^(const void *viewName) {
1341 const void *ctorset = NULL;
1342 if (CFDictionaryGetValueIfPresent(newViewName2ChangeTracker, viewName, &ctorset)) {
1343 if (isSet(ctorset)) {
1344 CFSetAddValue((CFMutableSetRef)ctorset, ct);
1345 } else if (!CFEqual(ct, ctorset)) {
1346 CFMutableSetRef set = CFSetCreateMutableForCFTypes(kCFAllocatorDefault);
1347 CFSetAddValue(set, ctorset);
1348 CFSetAddValue(set, ct);
1349 CFDictionaryReplaceValue(newViewName2ChangeTracker, viewName, set);
1350 CFRelease(set);
1351 }
1352 } else {
1353 CFDictionarySetValue(newViewName2ChangeTracker, viewName, ct);
1354 }
1355 });
1356 });
1357 CFAssignRetained(engine->viewName2ChangeTracker, newViewName2ChangeTracker);
1358 }
1359
1360 static void SOSEngineSetBackupBag(SOSEngineRef engine, SOSObjectRef bagItem);
1361
1362 // This is called only if we are in a circle and we should listen for keybag changes
1363 static void SOSEngineRegisterBackupBagV0Tracker(SOSEngineRef engine, CFMutableDictionaryRef newViewNameSet2ChangeTracker, CFMutableStringRef desc) {
1364 SOSChangeTrackerRef bbct = SOSReferenceAndGetChangeTracker(engine->viewNameSet2ChangeTracker, newViewNameSet2ChangeTracker, SOSViewsGetV0BackupBagViewSet());
1365 SOSChangeTrackerRegisterChangeUpdate(bbct, ^bool(SOSChangeTrackerRef ct, SOSEngineRef engine, SOSTransactionRef txn, SOSDataSourceTransactionSource source, SOSDataSourceTransactionPhase phase, CFArrayRef changes, CFErrorRef *error) {
1366 SOSChangeRef change;
1367 CFArrayForEachC(changes, change) {
1368 CFTypeRef object = NULL;
1369 bool isAdd = SOSChangeGetObject(change, &object);
1370 SecDbItemRef dbi = (SecDbItemRef)object;
1371 if (!isData(object) &&
1372 CFEqualSafe(SecDbItemGetCachedValueWithName(dbi, kSecAttrService), CFSTR("SecureBackupService")) &&
1373 CFEqualSafe(SecDbItemGetCachedValueWithName(dbi, kSecAttrAccessible), kSecAttrAccessibleWhenUnlocked) &&
1374 CFEqualSafe(SecDbItemGetCachedValueWithName(dbi, kSecAttrAccount), CFSTR("SecureBackupPublicKeybag"))) {
1375 SOSEngineSetBackupBag(engine, isAdd ? (SOSObjectRef)object : NULL);
1376 }
1377 }
1378 return true;
1379 });
1380 }
1381
1382 static void SOSEngineReferenceBackupPeer(SOSEngineRef engine, CFStringRef peerID, CFSetRef viewNameSet, CFDataRef keyBag, CFMutableDictionaryRef newViewNameSet2ChangeTracker, CFMutableDictionaryRef newPeerMap) {
1383 CFTypeRef oldEntry = CFDictionaryGetValue(engine->peerMap, peerID);
1384 CFTypeRef newEntry = SOSPeerOrStateSetViewsKeyBagAndCreateCopy(oldEntry, viewNameSet, keyBag);
1385 if (newEntry) {
1386 if (isDictionary(newEntry)) {
1387 // Backup peers, are always inflated
1388 CFAssignRetained(newEntry, SOSPeerCreateWithState(engine, peerID, newEntry, NULL));
1389 // If !oldEntry this is an edge (first creation of a peer).
1390 if (!oldEntry) {
1391 SOSPeerKeyBagDidChange((SOSPeerRef)newEntry);
1392 }
1393 }
1394 CFDictionarySetValue(newPeerMap, peerID, newEntry);
1395 CFRelease(newEntry);
1396
1397 if (keyBag) {
1398 SOSChangeTrackerRef ct = SOSReferenceAndGetChangeTracker(engine->viewNameSet2ChangeTracker, newViewNameSet2ChangeTracker, viewNameSet);
1399
1400 SOSChangeTrackerUpdatesChanges child = Block_copy(^bool(SOSChangeTrackerRef ct, SOSEngineRef engine, SOSTransactionRef txn, SOSDataSourceTransactionSource source, SOSDataSourceTransactionPhase phase, CFArrayRef changes, CFErrorRef *error) {
1401 return SOSPeerDataSourceWillChange((SOSPeerRef)newEntry, SOSEngineGetDataSource(engine), source, changes, error);
1402 });
1403
1404 SOSChangeTrackerRegisterChangeUpdate(ct, child);
1405 Block_release(child);
1406 }
1407 }
1408 }
1409
1410 static void SOSEngineReferenceSyncPeer(SOSEngineRef engine, CFStringRef peerID, CFSetRef viewNameSet, CFMutableDictionaryRef newViewNameSet2ChangeTracker, CFMutableDictionaryRef newPeerMap) {
1411 CFTypeRef newEntry = SOSPeerOrStateSetViewsKeyBagAndCreateCopy(CFDictionaryGetValue(engine->peerMap, peerID), viewNameSet, NULL);
1412 if (newEntry) {
1413 SOSChangeTrackerRef ct = SOSReferenceAndGetChangeTracker(engine->viewNameSet2ChangeTracker, newViewNameSet2ChangeTracker, viewNameSet);
1414 // Standard peer, inflated on demand
1415 SOSChangeTrackerUpdatesManifests trackManifest;
1416 if (isDictionary(newEntry)) {
1417 // Uninflated peer, inflate on first notification.
1418 trackManifest = ^bool(SOSChangeTrackerRef ct, SOSEngineRef engine, SOSTransactionRef txn, SOSDataSourceTransactionSource source, SOSDataSourceTransactionPhase phase, SOSManifestRef removals, SOSManifestRef additions, CFErrorRef *error) {
1419 CFErrorRef localError = NULL;
1420 SOSPeerRef peer = SOSEngineCopyPeerWithID_locked(engine, peerID, &localError);
1421 bool ok;
1422 if (!peer) {
1423 secerror("%@: peer failed to inflate: %@", peerID, localError);
1424 CFReleaseSafe(localError);
1425 ok = false;
1426 } else {
1427 ok = SOSPeerDataSourceWillCommit(peer, source, removals, additions, error);
1428 }
1429 CFReleaseSafe(peer);
1430 return ok;
1431 };
1432 } else {
1433 // Inflated peer, just forward the changes to the peer
1434 trackManifest = ^bool(SOSChangeTrackerRef ct, SOSEngineRef engine, SOSTransactionRef txn, SOSDataSourceTransactionSource source, SOSDataSourceTransactionPhase phase, SOSManifestRef removals, SOSManifestRef additions, CFErrorRef *error) {
1435 return SOSPeerDataSourceWillCommit((SOSPeerRef)newEntry, source, removals, additions, error);
1436 };
1437 }
1438 SOSChangeTrackerUpdatesManifests trackManifestCopy = Block_copy(trackManifest);
1439 SOSChangeTrackerRegisterManifestUpdate(ct, trackManifestCopy);
1440 Block_release(trackManifestCopy);
1441
1442 CFDictionarySetValue(newPeerMap, peerID, newEntry);
1443 CFRelease(newEntry);
1444 }
1445 }
1446
1447
1448 static void SOSEngineReferenceTrustedPeer(SOSEngineRef engine, SOSPeerMetaRef peerMeta, CFMutableDictionaryRef newViewNameSet2ChangeTracker, CFMutableDictionaryRef newPeerMap, CFMutableArrayRef peerIDs, CFMutableStringRef desc) {
1449 CFSetRef viewNameSet = NULL;
1450 CFDataRef keyBag = NULL;
1451 CFStringRef peerID = SOSPeerMetaGetComponents(peerMeta, &viewNameSet, &keyBag, NULL);
1452 // We trust peerID so append it to peerIDs
1453 CFArrayAppendValue(peerIDs, peerID);
1454 if (desc) CFStringAppendPeerIDAndViews(desc, peerID, viewNameSet);
1455 // Update the viewNameSet for this peer, to appease tests, default to a viewset of the V0 view.
1456 if (!viewNameSet)
1457 viewNameSet = SOSViewsGetV0ViewSet();
1458
1459 // Always inflate backup peers, since they need to register with their changeTrackers right away.
1460 if (keyBag) {
1461 SOSEngineReferenceBackupPeer(engine, peerID, viewNameSet, keyBag, newViewNameSet2ChangeTracker, newPeerMap);
1462 } else {
1463 SOSEngineReferenceSyncPeer(engine, peerID, viewNameSet, newViewNameSet2ChangeTracker, newPeerMap);
1464 }
1465 }
1466
1467 static CFDataRef SOSEngineCopyV0KeyBag(SOSEngineRef engine, CFErrorRef *error) {
1468 // Return the keybag for the given peerID.
1469 /*
1470 Values for V0 are:
1471 kSecAttrAccessGroup ==> CFSTR("com.apple.sbd")
1472 kSecAttrAccessible ==> kSecAttrAccessibleWhenUnlocked
1473 kSecAttrAccount ==> CFSTR("SecureBackupPublicKeybag")
1474 kSecAttrService ==> CFSTR("SecureBackupService")
1475 */
1476
1477 CFMutableDictionaryRef keys = CFDictionaryCreateMutableForCFTypesWith(kCFAllocatorDefault,
1478 kSecAttrAccessGroup, CFSTR("com.apple.sbd"),
1479 kSecAttrAccount, CFSTR("SecureBackupPublicKeybag"),
1480 kSecAttrService, CFSTR("SecureBackupService"),
1481 kSecAttrAccessible, kSecAttrAccessibleWhenUnlocked,
1482 kSecAttrSynchronizable, kCFBooleanTrue,
1483 NULL);
1484
1485 CFDataRef keybag = engine->dataSource->dsCopyItemDataWithKeys(engine->dataSource, keys, error);
1486 CFReleaseSafe(keys);
1487
1488 return keybag;
1489 }
1490
1491 static void SOSEngineReferenceBackupV0Peer(SOSEngineRef engine, CFMutableDictionaryRef newViewNameSet2ChangeTracker, CFMutableDictionaryRef newPeerMap, CFMutableArrayRef newPeerIDs, CFMutableStringRef desc) {
1492 SOSPeerRef backupPeer = (SOSPeerRef)CFDictionaryGetValue(engine->peerMap, kSOSViewKeychainV0_tomb);
1493 CFDataRef bag = NULL;
1494 if (backupPeer && CFGetTypeID(backupPeer) == SOSPeerGetTypeID()) {
1495 bag = CFRetainSafe(SOSPeerGetKeyBag(backupPeer));
1496 } else {
1497 CFErrorRef localError = NULL;
1498 bag = SOSEngineCopyV0KeyBag(engine, &localError);
1499 if (!bag) {
1500 secnotice("engine", "No keybag found for v0 backup peer: %@", localError);
1501 CFReleaseSafe(localError);
1502 }
1503 }
1504 SOSEngineReferenceBackupPeer(engine, kSOSViewKeychainV0_tomb, SOSViewsGetV0BackupViewSet(), bag, newViewNameSet2ChangeTracker, newPeerMap);
1505 CFReleaseNull(bag);
1506 }
1507
1508 static void SOSEngineReferenceTrustedPeers(SOSEngineRef engine, CFMutableDictionaryRef newViewNameSet2ChangeTracker, CFMutableDictionaryRef newPeerMap, CFMutableArrayRef newPeerIDs, CFArrayRef trustedPeerMetas, CFMutableStringRef desc) {
1509 // Then update the views for all trusted peers and add them to newPeerMap.
1510 if (trustedPeerMetas != NULL && CFArrayGetCount(trustedPeerMetas) != 0) {
1511 if (desc) CFStringAppend(desc, CFSTR(" trusted"));
1512 // Remake engine->peerIDs
1513 SOSPeerMetaRef peerMeta;
1514 CFArrayForEachC(trustedPeerMetas, peerMeta) {
1515 SOSEngineReferenceTrustedPeer(engine, peerMeta, newViewNameSet2ChangeTracker, newPeerMap, newPeerIDs, desc);
1516 }
1517 }
1518 }
1519
1520 static void SOSEngineReferenceUntrustedPeers(SOSEngineRef engine, CFMutableDictionaryRef newPeerMap, CFArrayRef untrustedPeerMetas, CFMutableStringRef description) {
1521 // Copy any untrustedPeers to newPeerMap as well if we have a state
1522 // for them, if not no big deal. We also serialize all the untrustedPeers
1523 // since they don't need to be deserializable
1524 if (untrustedPeerMetas != NULL && CFArrayGetCount(untrustedPeerMetas) != 0) {
1525 if (description) CFStringAppend(description, CFSTR(" untrusted"));
1526 SOSPeerMetaRef peerMeta;
1527 CFArrayForEachC(untrustedPeerMetas, peerMeta) {
1528 CFSetRef views = NULL;
1529 CFStringRef peerID = SOSPeerMetaGetComponents(peerMeta, &views, NULL, NULL);
1530 if (description) CFStringAppendPeerIDAndViews(description, peerID, views);
1531 CFSetRef nviews = NULL;
1532 if (!views)
1533 views = nviews = CFSetCreate(kCFAllocatorDefault, NULL, 0, &kCFTypeSetCallBacks);
1534 CFTypeRef newEntry = SOSPeerOrStateSetViewsAndCopyState(CFDictionaryGetValue(engine->peerMap, peerID), views);
1535 CFReleaseSafe(nviews);
1536 if (newEntry) {
1537 CFDictionarySetValue(newPeerMap, peerID, newEntry);
1538 CFReleaseSafe(newEntry);
1539 }
1540 }
1541 }
1542 }
1543
1544 static void SOSEngineReferenceChangeTrackers(SOSEngineRef engine, CFArrayRef trustedPeerMetas, CFArrayRef untrustedPeerMetas, CFMutableStringRef desc) {
1545 CFMutableArrayRef newPeerIDs = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
1546 CFMutableDictionaryRef newPeerMap = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
1547 CFMutableDictionaryRef newViewNameSet2ChangeTracker = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
1548
1549 if (engine->myID) {
1550 // We have an engineID => in a circle (with 0 or more peers)
1551 // Ensure we have a v0 backup peer and it's listening for backup bag changes
1552 SOSEngineReferenceBackupV0Peer(engine, newViewNameSet2ChangeTracker, newPeerMap, newPeerIDs, desc);
1553 SOSEngineRegisterBackupBagV0Tracker(engine, newViewNameSet2ChangeTracker, desc);
1554 }
1555 SOSEngineReferenceTrustedPeers(engine, newViewNameSet2ChangeTracker, newPeerMap, newPeerIDs, trustedPeerMetas, desc);
1556 SOSEngineReferenceUntrustedPeers(engine, newPeerMap, untrustedPeerMetas, desc);
1557
1558 CFAssignRetained(engine->peerIDs, newPeerIDs);
1559 CFAssignRetained(engine->peerMap, newPeerMap);
1560 CFAssignRetained(engine->viewNameSet2ChangeTracker, newViewNameSet2ChangeTracker);
1561 SOSEngineUpdateViewName2ChangeTracker(engine);
1562 }
1563
1564 // Return true iff peers or views changed
1565 static bool SOSEngineSetPeers_locked(SOSEngineRef engine, SOSPeerMetaRef myPeerMeta, CFArrayRef trustedPeerMetas, CFArrayRef untrustedPeerMetas) {
1566 CFErrorRef error = NULL;
1567 CFSetRef myViews = NULL;
1568 CFDataRef myKeyBag = NULL;
1569 CFMutableStringRef desc = CFStringCreateMutableCopy(kCFAllocatorDefault, 0, CFSTR("me"));
1570 CFStringRef myPeerID = myPeerMeta ? SOSPeerMetaGetComponents(myPeerMeta, &myViews, &myKeyBag, &error) : NULL;
1571 if (desc) CFStringAppendPeerIDAndViews(desc, myPeerID, myViews);
1572
1573 // Start with no coders
1574 CFMutableDictionaryRef codersToKeep = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
1575
1576 if(engine->haveLoadedCoders){
1577 // If we're the same peerID we keep known peers (both trusted and untrusted)
1578 if (CFEqualSafe(myPeerID, engine->myID)) {
1579 void (^copyPeerMetasCoder)(const void *value) = ^(const void*element) {
1580 SOSPeerMetaRef peerMeta = (SOSPeerMetaRef) element;
1581
1582 CFStringRef currentID = SOSPeerMetaGetComponents(peerMeta, NULL, NULL, NULL);
1583 if (currentID) {
1584 SOSCoderRef coder = (SOSCoderRef) CFDictionaryGetValue(engine->coders, currentID);
1585 if (coder) {
1586 CFDictionarySetValue(codersToKeep, currentID, coder);
1587 }
1588 }
1589 };
1590
1591 if (trustedPeerMetas) {
1592 CFArrayForEach(trustedPeerMetas, copyPeerMetasCoder);
1593 }
1594 if (untrustedPeerMetas) {
1595 CFArrayForEach(untrustedPeerMetas, copyPeerMetasCoder);
1596 }
1597 }
1598
1599 engine->codersNeedSaving = true;
1600 }
1601 CFRetainAssign(engine->myID, myPeerID);
1602 CFTransferRetained(engine->coders, codersToKeep);
1603
1604 // Remake engine->peerMap from both trusted and untrusted peers
1605 SOSEngineReferenceChangeTrackers(engine, trustedPeerMetas, untrustedPeerMetas, desc);
1606
1607 secnotice("engine", "%@", desc);
1608 CFReleaseSafe(desc);
1609 return true;
1610 }
1611
1612 static void SOSEngineApplyPeerState(SOSEngineRef engine, CFDictionaryRef peerStateMap) {
1613 if (peerStateMap) CFDictionaryForEach(peerStateMap, ^(const void *peerID, const void *peerState) {
1614 CFTypeRef mapEntry = CFDictionaryGetValue(engine->peerMap, peerID);
1615 if (mapEntry && CFGetTypeID(mapEntry) == SOSPeerGetTypeID()) {
1616 // Update the state of any already inflated peers
1617 SOSPeerRef peer = (SOSPeerRef)mapEntry;
1618 CFErrorRef localError = NULL;
1619 if (!SOSPeerSetState(peer, engine, peerState, &localError)) {
1620 CFStringRef stateHex = NULL;
1621 stateHex = CFDataCopyHexString(peerState);
1622 secerror("peer: %@: bad state: %@ in engine state: %@", peerID, localError, stateHex);
1623 CFReleaseSafe(stateHex);
1624 CFReleaseNull(localError);
1625 // Possibly ask for an ensurePeerRegistration so we have a good list of peers again.
1626 }
1627 } else {
1628 // Just record the state for non inflated peers for now.
1629 CFDictionarySetValue(engine->peerMap, peerID, peerState);
1630 }
1631 });
1632 }
1633
1634 static void SOSEngineSynthesizePeerMetas(SOSEngineRef engine, CFMutableArrayRef trustedPeersMetas, CFMutableArrayRef untrustedPeers) {
1635 CFSetRef trustedPeerSet = engine->peerIDs ? CFSetCreateCopyOfArrayForCFTypes(engine->peerIDs) : NULL;
1636 CFDictionaryForEach(engine->peerMap, ^(const void *peerID, const void *peerState) {
1637 SOSPeerMetaRef meta = NULL;
1638 if (peerState && CFGetTypeID(peerState) == SOSPeerGetTypeID()) {
1639 SOSPeerRef peer = (SOSPeerRef)peerState;
1640 meta = SOSPeerMetaCreateWithComponents(peerID, SOSPeerGetViewNameSet(peer), SOSPeerGetKeyBag(peer));
1641 } else {
1642 // We don't need to add the meta for the backup case, since
1643 // SOSEngineReferenceBackupV0Peer will do the right thing
1644 if (!CFEqualSafe(peerID, kSOSViewKeychainV0_tomb)) {
1645 meta = SOSPeerMetaCreateWithState(peerID, peerState);
1646 }
1647 }
1648 // Any peer in peerStateMap that is not in trustedPeers is an untrustedPeer unless it's the v0 backup peer
1649 if ((trustedPeerSet && CFSetContainsValue(trustedPeerSet, peerID)) || CFEqualSafe(peerID, kSOSViewKeychainV0_tomb)) {
1650 if (meta) {
1651 CFArrayAppendValue(trustedPeersMetas, meta);
1652 }
1653 } else {
1654 CFArrayAppendValue(untrustedPeers, peerID);
1655 }
1656 CFReleaseNull(meta);
1657 });
1658 CFReleaseNull(trustedPeerSet);
1659 }
1660
1661 static void SOSEngineSetBackupBag(SOSEngineRef engine, SOSObjectRef bagItem) {
1662 CFMutableStringRef desc = NULL;
1663 SOSPeerRef backupPeer = SOSEngineCopyPeerWithID_locked(engine, kSOSViewKeychainV0_tomb, NULL);
1664 CFDataRef keybag = NULL;
1665 if (bagItem) {
1666 keybag = SecDbItemGetValue((SecDbItemRef)bagItem, &v6v_Data, NULL);
1667 }
1668
1669 // Since SOSPeerSetKeyBag() doesn't notify on the edge from NULL->initial keybag, since
1670 // that is the right behaviour for non v0 backup peers, we need to do it here for the v0 peer.
1671 bool hadBag = SOSPeerGetKeyBag(backupPeer);
1672 SOSPeerSetKeyBag(backupPeer, keybag);
1673 if (!hadBag)
1674 SOSPeerKeyBagDidChange(backupPeer);
1675
1676 CFReleaseSafe(backupPeer);
1677
1678 CFMutableArrayRef untrustedPeerMetas = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
1679 CFMutableArrayRef trustedPeersMetas = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
1680 SOSEngineSynthesizePeerMetas(engine, trustedPeersMetas, untrustedPeerMetas);
1681 SOSEngineReferenceChangeTrackers(engine, trustedPeersMetas, untrustedPeerMetas, desc);
1682 CFReleaseSafe(trustedPeersMetas);
1683 CFReleaseSafe(untrustedPeerMetas);
1684 }
1685
1686 #define SECONDS_PER_DAY (86400.0)
1687
1688 #if (TARGET_OS_MAC && !(TARGET_OS_EMBEDDED || TARGET_OS_IPHONE))
1689 #define TRACE_INTERVAL (7 * SECONDS_PER_DAY)
1690 #elif (TARGET_OS_IPHONE && !TARGET_IPHONE_SIMULATOR)
1691 #define TRACE_INTERVAL (1 * SECONDS_PER_DAY)
1692 #endif
1693
1694 #ifdef TRACE_INTERVAL
1695 static void SOSEngineCloudKeychainTrace(SOSEngineRef engine, CFAbsoluteTime now) {
1696 CFAssignRetained(engine->lastTraceDate, CFDateCreate(kCFAllocatorDefault, now));
1697 CFIndex num_peers = engine->peerIDs ? 1 + CFArrayGetCount(engine->peerIDs) : 1;
1698 SOSManifestRef manifest = SOSEngineCopyManifestWithViewNameSet_locked(engine, SOSViewsGetV0ViewSet(), NULL);
1699 if (!manifest)
1700 manifest = SOSDataSourceCopyManifestWithViewNameSet(engine->dataSource, SOSViewsGetV0ViewSet(), NULL);
1701 size_t num_items = SOSManifestGetCount(manifest);
1702 CFReleaseSafe(manifest);
1703
1704 struct _SecServerKeyStats genpStats = { };
1705 struct _SecServerKeyStats inetStats = { };
1706 struct _SecServerKeyStats keysStats = { };
1707
1708 _SecServerGetKeyStats(genp_class(), &genpStats);
1709 _SecServerGetKeyStats(inet_class(), &inetStats);
1710 _SecServerGetKeyStats(keys_class(), &keysStats);
1711
1712 dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
1713 CloudKeychainTrace(num_peers, num_items, &genpStats, &inetStats, &keysStats);
1714 });
1715 }
1716 #endif
1717
1718 static void SOSEngineCloudKeychainTraceIfNeeded(SOSEngineRef engine) {
1719 #ifdef TRACE_INTERVAL
1720 if (!engine->myID)
1721 return;
1722 CFAbsoluteTime now = CFAbsoluteTimeGetCurrent();
1723 if (engine->lastTraceDate) {
1724 CFAbsoluteTime lastTraceTime = CFDateGetAbsoluteTime(engine->lastTraceDate);
1725 if ((now - lastTraceTime) >= TRACE_INTERVAL) {
1726 SOSEngineCloudKeychainTrace(engine, now);
1727 }
1728 } else {
1729 SOSEngineCloudKeychainTrace(engine, now);
1730 }
1731 #endif
1732 }
1733
1734
1735 static bool SOSEngineCircleChanged_locked(SOSEngineRef engine, SOSPeerMetaRef myPeerMeta, CFArrayRef trustedPeers, CFArrayRef untrustedPeers) {
1736 // Sanity check params
1737 // SOSEngineCircleChanged_sanitycheck(engine, myPeerID, trustedPeers, untrustedPeers);
1738
1739 // Transform from SOSPeerInfoRefs to CFDictionaries with the info we want per peer.
1740 // Or, Tell the real SOSPeerRef what the SOSPeerInfoRef is and have it copy out the data it needs.
1741 bool peersOrViewsChanged = SOSEngineSetPeers_locked(engine, myPeerMeta, trustedPeers, untrustedPeers);
1742
1743 // Run though all peers and only cache manifests for peers we still have
1744 CFErrorRef localError = NULL;
1745 if (!SOSEngineGCPeerState_locked(engine, &localError)) {
1746 secerror("SOSEngineGCPeerState_locked failed: %@", localError);
1747 CFReleaseNull(localError);
1748 }
1749 return peersOrViewsChanged;
1750 }
1751
1752 // Initialize the engine if a load fails. Basically this is our first time setup
1753 static bool SOSEngineInit(SOSEngineRef engine, CFErrorRef *error) {
1754 bool ok = true;
1755 secnotice("engine", "new engine for datasource named %@", SOSDataSourceGetName(engine->dataSource));
1756 CFAssignRetained(engine->peerMap, CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault));
1757 CFAssignRetained(engine->viewNameSet2ChangeTracker, CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault));
1758 CFAssignRetained(engine->viewName2ChangeTracker, CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault));
1759 CFReleaseNull(engine->manifestCache);
1760 CFReleaseNull(engine->peerIDs);
1761 // TODO: We shouldn't need to load the backup bag if there was no engine
1762 // state (load failed), since that means there was no circle nor were we an applicant.
1763
1764 // Set up change trackers so we know when a backup peer needs to be created?
1765 // no, since myID is not set, we are not in a circle, so no need to back up
1766 SOSEngineSetPeers_locked(engine, NULL, NULL, NULL);
1767 return ok;
1768 }
1769
1770 // Called by our DataSource in its constructor
1771 SOSEngineRef SOSEngineCreate(SOSDataSourceRef dataSource, CFErrorRef *error) {
1772 SOSEngineRef engine = NULL;
1773 engine = CFTypeAllocate(SOSEngine, struct __OpaqueSOSEngine, kCFAllocatorDefault);
1774 engine->dataSource = dataSource;
1775 engine->queue = dispatch_queue_create("engine", DISPATCH_QUEUE_SERIAL);
1776
1777 engine->peerMap = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
1778 engine->viewNameSet2ChangeTracker = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
1779 engine->viewName2ChangeTracker = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
1780 //engine->syncCompleteQueue = NULL;
1781 engine->syncCompleteListener = NULL;
1782 engine->coders = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
1783 engine->haveLoadedCoders = false;
1784 engine->codersNeedSaving = false;
1785
1786 CFErrorRef engineError = NULL;
1787 if (!SOSEngineLoad(engine, NULL, &engineError)) {
1788 secwarning("engine failed load state starting with nothing %@", engineError);
1789 CFReleaseNull(engineError);
1790 if (!SOSEngineInit(engine, error)) {
1791 secerror("engine failed to initialze %@ giving up", error ? *error : NULL);
1792 }
1793 } else {
1794 // Successfully loaded engine state, let's trace if we haven't in a while
1795 SOSEngineCloudKeychainTraceIfNeeded(engine);
1796 }
1797 SOSEngineSetNotifyPhaseBlock(engine);
1798 return engine;
1799 }
1800
1801 // --- Called from off the queue, need to move to on the queue
1802
1803 static void SOSEngineDoOnQueue(SOSEngineRef engine, dispatch_block_t action)
1804 {
1805 dispatch_sync(engine->queue, action);
1806 }
1807
1808 static bool SOSEngineDoTxnOnQueue(SOSEngineRef engine, CFErrorRef *error, void(^transaction)(SOSTransactionRef txn, bool *commit))
1809 {
1810 return SOSDataSourceWithCommitQueue(engine->dataSource, error, ^(SOSTransactionRef txn, bool *commit) {
1811 SOSEngineDoOnQueue(engine, ^{ transaction(txn, commit); });
1812 });
1813 }
1814
1815 //
1816 // MARK: SOSEngine API
1817 //
1818
1819 void SOSEngineDispose(SOSEngineRef engine) {
1820 // NOOP Engines stick around forever to monitor dataSource changes.
1821 engine->dataSource = NULL;
1822 CFReleaseNull(engine->coders);
1823 }
1824
1825 void SOSEngineForEachPeer(SOSEngineRef engine, void (^with)(SOSPeerRef peer)) {
1826 SOSEngineDoOnQueue(engine, ^{
1827 SOSEngineForEachPeer_locked(engine, with);
1828 });
1829 }
1830
1831 static void SOSEngineForEachBackupPeer(SOSEngineRef engine, void (^with)(SOSPeerRef peer)) {
1832 SOSEngineDoOnQueue(engine, ^{
1833 SOSEngineForEachBackupPeer_locked(engine, with);
1834 });
1835 }
1836
1837 static const CFStringRef kSecADSecurityNewItemSyncTimeKey = CFSTR("com.apple.security.secureobjectsync.itemtime.new");
1838 static const CFStringRef kSecADSecurityKnownItemSyncTimeKey = CFSTR("com.apple.security.secureobjectsync.itemtime.known");
1839
1840
1841 static void ReportItemSyncTime(SOSDataSourceRef ds, bool known, SOSObjectRef object)
1842 {
1843 CFDateRef itemModDate = SOSObjectCopyModificationDate(ds, object, NULL);
1844 if (itemModDate) {
1845 CFAbsoluteTime syncTime = 0;
1846 CFAbsoluteTime now = CFAbsoluteTimeGetCurrent();
1847
1848 CFAbsoluteTime peerModificationAbsoluteTime = CFDateGetAbsoluteTime(itemModDate);
1849 if (peerModificationAbsoluteTime > now) {
1850 syncTime = now - peerModificationAbsoluteTime;
1851 }
1852
1853 SecADClientPushValueForDistributionKey(known ? kSecADSecurityKnownItemSyncTimeKey : kSecADSecurityNewItemSyncTimeKey,
1854 SecBucket2Significant(syncTime));
1855 }
1856 CFReleaseNull(itemModDate);
1857 }
1858
1859 /* Handle incoming message from peer p. Return false if there was an error, true otherwise. */
1860 bool SOSEngineHandleMessage_locked(SOSEngineRef engine, CFStringRef peerID, SOSMessageRef message,
1861 SOSTransactionRef txn, bool *commit, bool *somethingChanged, CFErrorRef *error) {
1862 SOSPeerRef peer = SOSEngineCopyPeerWithID_locked(engine, peerID, error);
1863 if (!peer) return false;
1864
1865 CFStringRef peerDesc = NULL;
1866 SOSManifestRef localManifest = NULL;
1867 SOSManifestRef allAdditions = NULL;
1868 SOSManifestRef unwanted = NULL;
1869 SOSManifestRef confirmed = NULL;
1870 SOSManifestRef base = NULL;
1871 SOSManifestRef confirmedRemovals = NULL, confirmedAdditions = NULL;
1872 __block struct SOSDigestVector receivedObjects = SOSDigestVectorInit;
1873 __block struct SOSDigestVector unwantedObjects = SOSDigestVectorInit;
1874
1875 // Check for unknown criticial extensions in the message, and handle
1876 // any other extensions we support
1877 __block bool ok = true;
1878 CFMutableArrayRef changes = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
1879
1880 require_action_quiet(peer, exit, ok = SOSErrorCreate(errSecParam, error, NULL, CFSTR("Couldn't create peer with Engine for %@"), peerID));
1881 peerDesc = CFCopyDescription(peer);
1882
1883 bool hadBeenInSyncAtStart = SOSPeerHasBeenInSync(peer);
1884
1885 SOSMessageWithExtensions(message, true, ^(CFDataRef oid, bool isCritical, CFDataRef extension, bool *stop) {
1886 // OMFG a Critical extension what shall I do!
1887 ok = SOSErrorCreate(kSOSErrorNotReady, error, NULL, CFSTR("Unknown criticial extension in peer message"));
1888 *stop = true;
1889 });
1890 require_quiet(ok, exit);
1891
1892 // Merge Objects from the message into our DataSource.
1893 // Should we move the transaction to the SOSAccount level?
1894 // TODO: Filter incoming objects
1895 //if (!SOSDataSourceForEachObjectInViewSet(engine->dataSource, pendingObjects, SOSPeerGetViewNameSet(peer), error, ^void(CFDataRef key, SOSObjectRef object, bool *stop) {
1896 require_quiet(ok &= SOSMessageWithSOSObjects(message, engine->dataSource, error, ^(SOSObjectRef peersObject, bool *stop) {
1897 CFDataRef digest = SOSObjectCopyDigest(engine->dataSource, peersObject, error);
1898 if (!digest) {
1899 *stop = true;
1900 *commit = false;
1901 secerror("%@ peer sent bad object: %@, rolling back changes", SOSPeerGetID(peer), error ? *error : NULL);
1902 return;
1903 }
1904 SOSDigestVectorAppend(&receivedObjects, CFDataGetBytePtr(digest));
1905 SOSObjectRef mergedObject = NULL;
1906 SOSMergeResult mr = SOSDataSourceMergeObject(engine->dataSource, txn, peersObject, &mergedObject, error);
1907 // TODO: If the mr is kSOSMergeLocalObject most of the time (or all of the time),
1908 // consider asking the peer to stop sending us objects, and send it objects instead.
1909 ok &= (mr != kSOSMergeFailure);
1910 if (!ok) {
1911 *stop = true;
1912 *commit = false;
1913 // TODO: Might want to change to warning since the race of us locking after ckd sends us a message could cause db locked errors here.
1914 secerror("%@ SOSDataSourceMergeObject failed %@ rolling back changes", SOSPeerGetID(peer), error ? *error : NULL);
1915 } else if (mr==kSOSMergePeersObject || mr==kSOSMergeCreatedObject) {
1916 *somethingChanged = true;
1917 } else {
1918 // mr == kSOSMergeLocalObject
1919 if (!CFEqual(mergedObject, peersObject)) {
1920 // Record this object as something we don't want peer to ever send us again. By adding it to
1921 // unwantedObjects we'll falsely claim to peer we have it until they tell us they don't have it anymore.
1922 SOSDigestVectorAppend(&unwantedObjects, CFDataGetBytePtr(digest));
1923 }
1924 // Ensure localObject is in local manifest (possible corruption) by posting an update when we are done.
1925 SOSChangesAppendAdd(changes, mergedObject);
1926 }
1927
1928 if (ok && hadBeenInSyncAtStart) {
1929 ReportItemSyncTime(engine->dataSource,
1930 mr == kSOSMergeLocalObject,
1931 peersObject);
1932 }
1933
1934 CFReleaseSafe(mergedObject);
1935 CFReleaseSafe(digest);
1936 }), exit);
1937 struct SOSDigestVector dvunion = SOSDigestVectorInit;
1938 SOSDigestVectorSort(&receivedObjects);
1939 SOSDigestVectorUnionSorted(SOSManifestGetDigestVector(SOSMessageGetAdditions(message)), &receivedObjects, &dvunion);
1940 allAdditions = SOSManifestCreateWithDigestVector(&dvunion, error);
1941 SOSDigestVectorFree(&receivedObjects);
1942 SOSDigestVectorFree(&dvunion);
1943
1944 unwanted = SOSManifestCreateWithDigestVector(&unwantedObjects, error);
1945 SOSDigestVectorFree(&unwantedObjects);
1946
1947 if (CFArrayGetCount(changes)) {
1948 // NOTE: This is always notifiying of all additions that end up choosing local, which should be rare, since we shouldn't
1949 // be receiving objects we already have. When we do we tell ourselves to add them all again so our views will properly
1950 // reflect that we actually have these objects if we didn't already.
1951
1952 // Ensure any objects that we received and have locally already are actually in our local manifest
1953 SOSEngineUpdateChanges_locked(engine, txn, kSOSDataSourceTransactionDidCommit, kSOSDataSourceSOSTransaction, changes, error);
1954 }
1955 CFReleaseSafe(changes);
1956
1957 // ---- Don't use local or peer manifests from above this line,
1958 // ---- since commiting the SOSDataSourceWith transaction might change them ---
1959
1960 // Take a snapshot of our dataSource's local manifest.
1961 require_quiet(ok = localManifest = SOSEngineCopyLocalPeerManifest_locked(engine, peer, error), exit);
1962
1963 CFDataRef baseDigest = SOSMessageGetBaseDigest(message);
1964 CFDataRef proposedDigest = SOSMessageGetProposedDigest(message);
1965
1966 #if 0
1967 // I believe this is no longer needed now that we have eliminated extra,
1968 // since this is handled below once we get a confirmed manifest from our
1969 // peer.
1970
1971 // If we just received a L00 reset pendingObjects to localManifest
1972 if (!baseDigest && !proposedDigest) {
1973 // TODO: This is definitely busted for v0 peers since v0 peers always send a
1974 // L00 (ManifestDigestMessage as an ack) whereas in v2 this is a protocol restart
1975 // However if we can still find a confirmed manifest below we probably
1976 // don't want to do this even for v2.
1977 // Also I don't think we will ever send a ManifestMessage right now in
1978 // response to a ManifestDigest
1979 SOSPeerSetPendingObjects(peer, localManifest);
1980 secnoticeq("engine", "%@:%@ SOSPeerSetPendingObjects: %@", engine->myID, peerID, localManifest);
1981 }
1982 #endif
1983
1984 base = SOSPeerCopyManifestForDigest(peer, baseDigest);
1985
1986 // Note that the sender digest will only exist if we receive a SOSManifestDigestMessageType (since we never receive v2 messages)
1987 confirmed = SOSPeerCopyManifestForDigest(peer, SOSMessageGetSenderDigest(message));
1988 if (!confirmed) {
1989 if (SOSManifestGetCount(SOSMessageGetRemovals(message)) || SOSManifestGetCount(allAdditions)) {
1990 if (base || !baseDigest) {
1991
1992 secnotice("engine", "SOSEngineHandleMessage_locked (%@): creating a confirmed manifest via a patch (base %zu %@, +%zu, -%zu)", SOSPeerGetID(peer),
1993 SOSManifestGetCount(base), SOSManifestGetDigest(base, NULL),
1994 SOSManifestGetCount(allAdditions), SOSManifestGetCount(SOSMessageGetRemovals(message)));
1995
1996 confirmed = SOSManifestCreateWithPatch(base, SOSMessageGetRemovals(message), allAdditions, error);
1997 }
1998 if (!confirmed) {
1999 confirmedRemovals = CFRetainSafe(SOSMessageGetRemovals(message));
2000 confirmedAdditions = CFRetainSafe(allAdditions);
2001 }
2002 } else if (baseDigest) {
2003 confirmed = CFRetainSafe(base);
2004 secerror("%@:%@ Protocol error send L00 - figure out later base: %@", engine->myID, peerID, base);
2005 }
2006
2007 } else {
2008 secnotice("engine", "SOSEngineHandleMessage_locked (%@): got a confirmed manifest by digest: (%zu, %@)", SOSPeerGetID(peer), SOSManifestGetCount(confirmed), SOSMessageGetSenderDigest(message));
2009 }
2010 secnoticeq("engine", "%@:%@ confirmed: %@ base: %@", engine->myID, peerID, confirmed, base);
2011 if (confirmed) {
2012 ok &= SOSManifestDiff(SOSPeerGetConfirmedManifest(peer), confirmed, &confirmedRemovals, &confirmedAdditions, error);
2013 if (SOSManifestGetCount(SOSMessageGetRemovals(message)))
2014 CFAssignRetained(confirmedRemovals, SOSManifestCreateUnion(confirmedRemovals, SOSMessageGetRemovals(message), error));
2015 }
2016 if (SOSManifestGetCount(confirmedRemovals) || SOSManifestGetCount(confirmedAdditions) || SOSManifestGetCount(unwanted)) {
2017 ok &= SOSPeerDidReceiveRemovalsAndAdditions(peer, confirmedRemovals, confirmedAdditions, unwanted, localManifest, error);
2018 }
2019
2020
2021 // TODO: We should probably remove the if below and always call SOSPeerSetConfirmedManifest,
2022 // since having a NULL confirmed will force us to send a manifest message to get in sync again.
2023 if (confirmed) {
2024
2025 SOSManifestRef previousConfirmedManifest = SOSPeerGetConfirmedManifest(peer);
2026 if(previousConfirmedManifest) {
2027 secnotice("engine", "SOSEngineHandleMessage_locked (%@): new confirmed manifest (%zu, %@) will replace existing confirmed manifest (%zu, %@)", SOSPeerGetID(peer),
2028 SOSManifestGetCount(confirmed), SOSManifestGetDigest(confirmed, NULL),
2029 SOSManifestGetCount(previousConfirmedManifest), SOSManifestGetDigest(previousConfirmedManifest, NULL));
2030 } else {
2031 secnotice("engine", "SOSEngineHandleMessage_locked (%@): new confirmed manifest (%zu, %@) is first manifest for peer", SOSPeerGetID(peer),
2032 SOSManifestGetCount(confirmed), SOSManifestGetDigest(confirmed, NULL));
2033 }
2034
2035 SOSPeerSetConfirmedManifest(peer, confirmed);
2036 } else if (SOSPeerGetConfirmedManifest(peer)) {
2037 secnoticeq("engine", "%@:%@ unable to find confirmed in %@, sync protocol reset", engine->myID, peer, message);
2038
2039 SOSPeerSetConfirmedManifest(peer, NULL);
2040 //SOSPeerSetSendObjects(peer, true);
2041 }
2042
2043 // ---- SendObjects and extra->pendingObjects promotion dance ----
2044
2045 // The first block of code below sets peer.sendObjects to true when we receive a L00 and the second block
2046 // moves extra to pendingObjects once we receive a confirmed manifest in or after the L00.
2047 if (!baseDigest && !proposedDigest) {
2048 SOSPeerSetSendObjects(peer, true);
2049 }
2050
2051 if (0 /* confirmed && SOSPeerSendObjects(peer) */) {
2052 SOSManifestRef allExtra = NULL;
2053 ok &= SOSManifestDiff(confirmed, localManifest, NULL, &allExtra, error);
2054 secnoticeq("engine", "%@:%@ confirmed %@ (re)setting O:%@", engine->myID, SOSPeerGetID(peer), confirmed, allExtra);
2055 SOSPeerSetPendingObjects(peer, allExtra);
2056 CFReleaseSafe(allExtra);
2057 }
2058
2059 exit:
2060 secnotice("engine", "recv %@:%@ %@", engine->myID, SOSPeerGetID(peer), message);
2061 secnotice("peer", "recv %@ -> %@", peerDesc, peer);
2062
2063 CFReleaseNull(base);
2064 CFReleaseSafe(confirmed);
2065 CFReleaseSafe(localManifest);
2066 CFReleaseSafe(peerDesc);
2067 CFReleaseSafe(allAdditions);
2068 CFReleaseSafe(unwanted);
2069 CFReleaseSafe(confirmedRemovals);
2070 CFReleaseSafe(confirmedAdditions);
2071 CFReleaseSafe(peer);
2072 return ok;
2073 }
2074
2075 static CFDataRef SOSEngineCopyObjectDER(SOSEngineRef engine, SOSObjectRef object, CFErrorRef *error) {
2076 CFDataRef der = NULL;
2077 CFDictionaryRef plist = SOSObjectCopyPropertyList(engine->dataSource, object, error);
2078 if (plist) {
2079 der = CFPropertyListCreateDERData(kCFAllocatorDefault, plist, error);
2080 CFRelease(plist);
2081 }
2082 return der;
2083 }
2084
2085
2086 /*
2087
2088 +-----------------------------+_
2089 | | | \
2090 | A | T | \
2091 | | | \
2092 _+=============================+ } L
2093 / | | /
2094 / | S | /
2095 / | |_/
2096 / +==============================
2097 / | |
2098 C { | |
2099 \ | M +------------|
2100 \ | | |
2101 \ | | U |
2102 \ | | |
2103 \_+-------------+---------------+
2104
2105 A assumed
2106 T to be sent
2107 S shared
2108 M missing
2109 U unwanted
2110 L local
2111 C confirmed
2112
2113 */
2114 #if 0
2115 static bool SOSAppendRemoveToPatch(CFTypeRef remove, CFMutableDictionaryRef patch, CFErrorRef *error) {
2116 }
2117
2118 static bool SOSAppendAddToPatch(CFTypeRef add, CFMutableDictionaryRef patch, CFErrorRef *error) {
2119 }
2120
2121 static bool SOSAppendDiffToPatch(CFTypeRef left, CFTypeRef right, CFMutableDictionaryRef patch, CFErrorRef *error) {
2122 bool ok = true;
2123 if (!left && right) {
2124 SOSAppendAddToPatch(right, patch, error);
2125 } else if (left && !right) {
2126 SOSAppendRemoveToPatch(left, patch, error);
2127 } else if (left && right) {
2128 CFTypeID ltype = CFGetTypeID(left);
2129 CFTypeID rtype = CFGetTypeID(right);
2130 if (ltype == rtype) {
2131 if (CFArrayGetTypeID() == ltype) {
2132 ok = SecError(errSecParam, error, CFSTR("unsupported type array"), ltype);
2133 } else if (CFBooleanGetTypeID == ltype) {
2134 ok = SecError(errSecParam, error, CFSTR("unsupported type boolean"), ltype);
2135 } else if (CFDataGetTypeID == ltype) {
2136 ok = SecError(errSecParam, error, CFSTR("unsupported type data"), ltype);
2137 } else if (CFDictionaryGetTypeID == ltype) {
2138 __block CFMutableDictionaryRef leftnotright = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
2139 __block CFMutableDictionaryRef rightnotleft = CFDictionaryCreateMutableCopy(kCFAllocatorDefault, 0, right);
2140
2141 CFDictionaryForEach(left, ^(const void *key, const void *lvalue) {
2142 const void *rvalue = NULL;
2143 if (CFDictionaryGetValueIfPresent(right, key, &rvalue)) {
2144 CFDictionaryRemoveValue(rightnotleft, key);
2145
2146 CFMutableDictionaryRef subpatch = CFDictionaryCreateForCFTypes(kCFAllocatorDefault);
2147 CFDictionaryAddValue(patch, key, subpatch);
2148 SOSAppendDiffToPatch(lvalue, rvalue, subpatch, error);
2149 CFReleaseSafe(subpatch);
2150 } else {
2151 CFDictionaryAddValue(leftnotright, key, lvalue);
2152 }
2153 });
2154 // Proccess leftnotright and rightnotleft
2155 CFReleaseSafe(leftnotright);
2156 CFReleaseSafe(rightnotleft);
2157 } else if (SOSManifestGetTypeID == ltype) {
2158 SOSManifestRef removed = NULL, added = NULL;
2159 ok &= SOSManifestDiff(left, right, &removed, &added, error);
2160 if (SOSManifestGetCount(removed) || SOSManifestGetCount(added)) {
2161 SOSAppendDiffToPatch(lvalue, rvalue, subpatch, error);
2162 CFStringAppend(, <#CFStringRef appendedString#>)
2163 }
2164 CFReleaseSafe(removed);
2165 CFReleaseSafe(added);
2166 } else if (CFNumberGetTypeID == ltype) {
2167 ok = SecError(errSecParam, error, CFSTR("unsupported type number"), ltype);
2168 } else if (CFSetGetTypeID == ltype) {
2169 ok = SecError(errSecParam, error, CFSTR("unsupported type set"), ltype);
2170 } else if (CFStringGetTypeID == ltype) {
2171 ok = SecError(errSecParam, error, CFSTR("unsupported type string"), ltype);
2172 } else {
2173 ok = SecError(errSecParam, error, CFSTR("unknown type %lu"), ltype);
2174 }
2175 }
2176 } else if (!left && !right) {
2177 // NOOP
2178 }
2179 }
2180 #endif
2181
2182 static __unused bool SOSEngineCheckPeerIntegrity(SOSEngineRef engine, SOSPeerRef peer, CFErrorRef *error) {
2183 #if 0
2184 //static CFMutableDictionaryRef p2amtu;
2185 if (!engine->p2amtu)
2186 engine->p2amtu = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
2187 CFDictionaryRef amtu = CFDictionaryGetValue(engine->p2amtu, SOSPeerGetID(peer));
2188 #endif
2189
2190 // Inputs
2191 SOSManifestRef L = SOSEngineCopyLocalPeerManifest_locked(engine, peer, error);
2192 SOSManifestRef T = SOSPeerGetPendingObjects(peer);
2193 SOSManifestRef C = SOSPeerGetConfirmedManifest(peer);
2194 SOSManifestRef U = SOSPeerGetUnwantedManifest(peer);
2195
2196 // Computed
2197 SOSManifestRef CunionU = SOSManifestCreateUnion(C, U, error);
2198 SOSManifestRef S = SOSManifestCreateIntersection(L, CunionU, error);
2199
2200 SOSManifestRef AunionT = NULL, MunionU = NULL;
2201 SOSManifestDiff(L, C, &AunionT, &MunionU, error);
2202
2203 SOSManifestRef A = SOSManifestCreateComplement(T, AunionT, error);
2204 SOSManifestRef M = SOSManifestCreateComplement(U, MunionU, error);
2205
2206 SOSManifestRef SunionAunionT = SOSManifestCreateUnion(S, AunionT, error);
2207 SOSManifestRef SunionMunionU = SOSManifestCreateUnion(S, MunionU, error);
2208
2209 SOSManifestRef AintersectM = SOSManifestCreateIntersection(A, M, error);
2210 SOSManifestRef AintersectS = SOSManifestCreateIntersection(A, S, error);
2211 SOSManifestRef AintersectT = SOSManifestCreateIntersection(A, T, error);
2212 SOSManifestRef AintersectU = SOSManifestCreateIntersection(A, U, error);
2213 SOSManifestRef MintersectS = SOSManifestCreateIntersection(M, S, error);
2214 SOSManifestRef MintersectT = SOSManifestCreateIntersection(M, T, error);
2215 SOSManifestRef MintersectU = SOSManifestCreateIntersection(M, U, error);
2216 SOSManifestRef SintersectT = SOSManifestCreateIntersection(S, T, error);
2217 SOSManifestRef SintersectU = SOSManifestCreateIntersection(S, U, error);
2218 SOSManifestRef TintersectU = SOSManifestCreateIntersection(T, U, error);
2219
2220 #if 0
2221 CFDictionaryRef newAmtu = CFDictionaryCreateForCFTypes(kCFAllocatorDefault, CFSTR("A"), A, CFSTR("M"), M, CFSTR("T"), T, CFSTR("U") U, NULL);
2222 CFDictionarySetValue(engine->p2amtu, SOSPeerGetID(peer), newAmtu);
2223 CFMutableStringRef amtuChanges = CFStringCreateMutable(kCFAllocatorDefault, 0);
2224 SOSAppendDiffToString(amtu, newAmtu, amtuChanges);
2225 secnotice("engine", "%@: %@", SOSPeerGetID(peer), amtuChanges);
2226 #endif
2227
2228 #define SOSASSERT(e) (__builtin_expect(!(e), 0) ? secnotice("engine", "state-assertion %s", #e), assert(e) : (void)0)
2229
2230 SOSASSERT(L ? CFEqual(L, SunionAunionT) : SOSManifestGetCount(SunionAunionT) == 0);
2231 SOSASSERT(C ? CFEqual(C, SunionMunionU) : SOSManifestGetCount(SunionMunionU) == 0);
2232
2233 SOSASSERT(SOSManifestGetCount(AintersectM) == 0);
2234 SOSASSERT(SOSManifestGetCount(AintersectS) == 0);
2235 SOSASSERT(SOSManifestGetCount(AintersectT) == 0);
2236 SOSASSERT(SOSManifestGetCount(AintersectU) == 0);
2237 SOSASSERT(SOSManifestGetCount(MintersectS) == 0);
2238 SOSASSERT(SOSManifestGetCount(MintersectT) == 0);
2239 SOSASSERT(SOSManifestGetCount(MintersectU) == 0);
2240 SOSASSERT(SOSManifestGetCount(SintersectT) == 0);
2241 SOSASSERT(SOSManifestGetCount(SintersectU) == 0);
2242 SOSASSERT(SOSManifestGetCount(TintersectU) == 0);
2243
2244 CFReleaseSafe(AintersectM);
2245 CFReleaseSafe(AintersectS);
2246 CFReleaseSafe(AintersectT);
2247 CFReleaseSafe(AintersectU);
2248 CFReleaseSafe(MintersectS);
2249 CFReleaseSafe(MintersectT);
2250 CFReleaseSafe(MintersectU);
2251 CFReleaseSafe(SintersectT);
2252 CFReleaseSafe(SintersectU);
2253 CFReleaseSafe(TintersectU);
2254
2255 CFReleaseSafe(AunionT);
2256 CFReleaseSafe(MunionU);
2257 CFReleaseSafe(CunionU);
2258
2259 CFReleaseNull(SunionAunionT);
2260 CFReleaseNull(SunionMunionU);
2261
2262 CFReleaseSafe(A);
2263 CFReleaseSafe(M);
2264 CFReleaseSafe(S);
2265 //CFReleaseSafe(T); // Get
2266 //CFReleaseSafe(U); // Get
2267 //CFReleaseSafe(C); // Get
2268 CFReleaseSafe(L);
2269 return true;
2270 }
2271
2272 void SOSEngineSetSyncCompleteListener(SOSEngineRef engine, SOSEnginePeerInSyncBlock notify_block) {
2273 SOSEngineDoOnQueue(engine, ^{
2274 CFAssignRetained(engine->syncCompleteListener, Block_copy(notify_block));
2275 });
2276 }
2277
2278 void SOSEngineSetSyncCompleteListenerQueue(SOSEngineRef engine, dispatch_queue_t notify_queue) {
2279 SOSEngineDoOnQueue(engine, ^{
2280 CFRetainAssign(engine->syncCompleteQueue, notify_queue);
2281 });
2282 }
2283
2284 static void SOSEngineCompletedSyncWithPeer(SOSEngineRef engine, SOSPeerRef peer) {
2285 SOSEnginePeerInSyncBlock block_to_call = engine->syncCompleteListener;
2286
2287 if (block_to_call && engine->syncCompleteQueue) {
2288 CFStringRef ID = CFRetainSafe(SOSPeerGetID(peer));
2289 CFSetRef views = CFRetainSafe(SOSPeerGetViewNameSet(peer));
2290 CFRetainSafe(block_to_call);
2291
2292 dispatch_async(engine->syncCompleteQueue, ^{
2293 block_to_call(ID, views);
2294 CFReleaseSafe(ID);
2295 CFReleaseSafe(views);
2296 CFReleaseSafe(block_to_call);
2297 });
2298 }
2299
2300 SOSPeerSetHasBeenInSync(peer, true);
2301 }
2302
2303
2304 CFDataRef SOSEngineCreateMessage_locked(SOSEngineRef engine, SOSTransactionRef txn, SOSPeerRef peer,
2305 CFMutableArrayRef *attributeList, CFErrorRef *error, SOSEnginePeerMessageSentCallback **sent) {
2306 SOSManifestRef local = SOSEngineCopyLocalPeerManifest_locked(engine, peer, error);
2307 __block SOSMessageRef message = SOSMessageCreate(kCFAllocatorDefault, SOSPeerGetMessageVersion(peer), error);
2308 SOSManifestRef confirmed = SOSPeerGetConfirmedManifest(peer);
2309 SOSManifestRef pendingObjects = SOSPeerGetPendingObjects(peer);
2310 SOSManifestRef objectsSent = NULL;
2311 SOSManifestRef proposed = NULL;
2312 SOSManifestRef allMissing = NULL;
2313 SOSManifestRef allExtra = NULL;
2314 SOSManifestRef extra = NULL;
2315 SOSManifestRef excessPending = NULL;
2316 SOSManifestRef missing = NULL;
2317 SOSManifestRef unwanted = SOSPeerGetUnwantedManifest(peer);
2318 SOSManifestRef excessUnwanted = NULL;
2319 CFDataRef result = NULL;
2320
2321 // Given (C, L, T, U) compute (T, U, M, A)
2322 // (C \ L) \ U => M
2323 // (L \ C) \ T => A
2324 // we also compute
2325 // U \ (C \ L) => EU
2326 // T \ (L \ C) => ET
2327 // And assert that both EU and ET are empty and if not remove them from U and T respectively
2328 SOSManifestDiff(confirmed, local, &allMissing, &allExtra, error);
2329 SOSManifestDiff(allExtra, pendingObjects, &extra, &excessPending, error);
2330 if (SOSManifestGetCount(excessPending)) {
2331 // T \ (L \ C) => excessPending (items both in L and C or in neither that are still pending)
2332 // Can only happen if a member of T was removed from L without us having a chance to update T
2333 secerror("%@ ASSERTION FAILURE purging excess pendingObjects: %@", peer, excessPending);
2334 SOSManifestRef newPendingObjects = SOSManifestCreateComplement(excessPending, pendingObjects, error);
2335 SOSPeerSetPendingObjects(peer, newPendingObjects);
2336 CFReleaseSafe(newPendingObjects);
2337 pendingObjects = SOSPeerGetPendingObjects(peer);
2338 }
2339 SOSManifestDiff(allMissing, unwanted, &missing, &excessUnwanted, error);
2340 if (SOSManifestGetCount(excessUnwanted)) {
2341 // U \ (C \ L) => excessUnwanted (items both in L and C or in neither that are still unwanted)
2342 // Can only happen if a member of U was added to L without us having a chance to update U.
2343 // Since U only contains items the conflict resolver rejected, this implies L somehow got rolled back
2344 // The other option (and more likely) is a member of U was removed from C and not from U.
2345 secerror("%@ ASSERTION FAILURE purging excess unwanted: %@", peer, excessUnwanted);
2346 SOSManifestRef newUnwanted = SOSManifestCreateComplement(excessUnwanted, unwanted, error);
2347 SOSPeerSetUnwantedManifest(peer, newUnwanted);
2348 CFReleaseSafe(newUnwanted);
2349 unwanted = SOSPeerGetUnwantedManifest(peer);
2350 }
2351
2352 CFReleaseNull(allExtra);
2353 CFReleaseNull(excessPending);
2354 CFReleaseNull(allMissing);
2355 CFReleaseNull(excessUnwanted);
2356
2357 secnoticeq("engine", "%@:%@: send state for peer [%s%s%s][%s%s] local:%zu confirmed:%zu pending:%zu, extra:%zu, missing:%zu unwanted:%zu", engine->myID, SOSPeerGetID(peer),
2358 local ? "L":"l",
2359 confirmed ? "C":"0",
2360 pendingObjects ? "P":"0",
2361 SOSPeerSendObjects(peer) ? "O":"o",
2362 SOSPeerMustSendMessage(peer) ? "S":"s",
2363 SOSManifestGetCount(local),
2364 SOSManifestGetCount(confirmed),
2365 SOSManifestGetCount(pendingObjects),
2366 SOSManifestGetCount(extra),
2367 SOSManifestGetCount(missing),
2368 SOSManifestGetCount(unwanted)
2369 );
2370
2371 if (confirmed) {
2372 // TODO: Because of not letting things terminate while we have extra left
2373 // we might send objects when we didn't need to, but there is always an
2374 // extra roundtrip required for objects that we assume the other peer
2375 // should have already.
2376 // TODO: If there are extra objects left, calling this function is not
2377 // idempotent we should check if pending is what we are about to send and not send anything in this case.
2378 if (SOSManifestGetCount(pendingObjects) == 0 && SOSManifestGetCount(extra) == 0)
2379 SOSPeerSetSendObjects(peer, false);
2380
2381 // If we aren't missing anything, we've gotten all their data, so we're sync even if they haven't seen ours.
2382 if (missing && SOSManifestGetCount(missing) == 0) {
2383 SOSEngineCompletedSyncWithPeer(engine, peer);
2384 }
2385
2386 if (CFEqualSafe(local, SOSPeerGetProposedManifest(peer)) && !SOSPeerMustSendMessage(peer)) {
2387 bool send = false;
2388 if (CFEqual(confirmed, local)) {
2389 secnoticeq("engine", "synced <No MSG> %@:%@", engine->myID, peer);
2390 } else if (SOSManifestGetCount(pendingObjects) == 0 /* TODO: No entries moved from extra to pendingObjects. */
2391 && SOSManifestGetCount(missing) == 0) {
2392 secnoticeq("engine", "waiting <MSG not resent> %@:%@ extra: %@", engine->myID, peer, extra);
2393 } else {
2394 send = true;
2395 }
2396 if (!send) {
2397 CFReleaseNull(local);
2398 CFReleaseNull(message);
2399 CFReleaseNull(extra);
2400 CFReleaseNull(missing);
2401 return CFDataCreate(kCFAllocatorDefault, NULL, 0);
2402 }
2403 }
2404
2405 if (SOSManifestGetCount(pendingObjects)) {
2406 // If we have additions and we need to send objects, do so.
2407 __block size_t objectsSize = 0;
2408 __block struct SOSDigestVector dv = SOSDigestVectorInit;
2409 CFMutableArrayRef changes = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
2410 __block CFErrorRef dsfeError = NULL;
2411
2412 if (!SOSDataSourceForEachObject(engine->dataSource, txn, pendingObjects, &dsfeError, ^void(CFDataRef key, SOSObjectRef object, bool *stop) {
2413 CFErrorRef localError = NULL;
2414 CFDataRef digest = NULL;
2415 CFDataRef der = NULL;
2416 #if !defined(NDEBUG)
2417 const uint8_t *d = CFDataGetBytePtr(key);
2418 #endif
2419 secdebug("engine", "%@:%@ object %02X%02X%02X%02X error from SOSDataSourceForEachObject: %@",
2420 engine->myID, SOSPeerGetID(peer), d[0], d[1], d[2], d[3], dsfeError);
2421 if (!object) {
2422 const uint8_t *d = CFDataGetBytePtr(key);
2423 secerror("%@:%@ object %02X%02X%02X%02X dropping from manifest: not found in datasource: %@",
2424 engine->myID, SOSPeerGetID(peer), d[0], d[1], d[2], d[3], dsfeError);
2425 SOSChangesAppendDelete(changes, key);
2426 } else if (!(der = SOSEngineCopyObjectDER(engine, object, &localError))
2427 || !(digest = SOSObjectCopyDigest(engine->dataSource, object, &localError))) {
2428 if (SecErrorGetOSStatus(localError) == errSecDecode) {
2429 // Decode error, we need to drop these objects from our manifests
2430 const uint8_t *d = CFDataGetBytePtr(key);
2431 secnoticeq("engine", "%@:%@ object %02X%02X%02X%02X dropping from manifest: %@",
2432 engine->myID, SOSPeerGetID(peer), d[0], d[1], d[2], d[3], localError);
2433 SOSChangesAppendDelete(changes, key);
2434 CFRelease(localError);
2435 } else {
2436 // Stop iterating and propagate out all other errors.
2437 const uint8_t *d = CFDataGetBytePtr(key);
2438 secnoticeq("engine", "%@:%@ object %02X%02X%02X%02X in SOSDataSourceForEachObject: %@",
2439 engine->myID, SOSPeerGetID(peer), d[0], d[1], d[2], d[3], localError);
2440 *stop = true;
2441 CFErrorPropagate(localError, error);
2442 CFReleaseNull(message);
2443 }
2444 } else {
2445 if (!CFEqual(key, digest)) {
2446 const uint8_t *d = CFDataGetBytePtr(key);
2447 const uint8_t *e = CFDataGetBytePtr(digest);
2448 secnoticeq("engine", "%@:%@ object %02X%02X%02X%02X is really %02X%02X%02X%02X dropping from local manifest",
2449 engine->myID, SOSPeerGetID(peer), d[0], d[1], d[2], d[3], e[0], e[1], e[2], e[3]);
2450 SOSChangesAppendDelete(changes, key);
2451 SOSChangesAppendAdd(changes, object); // This is new behaviour but we think it's more correct
2452 }
2453
2454 size_t objectLen = (size_t)CFDataGetLength(der);
2455 if (SOSMessageAppendObject(message, der, &localError)) {
2456 SOSDigestVectorAppend(&dv, CFDataGetBytePtr(digest));
2457 if(!*attributeList)
2458 *attributeList = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
2459 CFDictionaryRef itemPlist = SOSObjectCopyPropertyList(engine->dataSource, object, &localError);
2460 if(itemPlist && !CFArrayContainsValue(*attributeList, CFRangeMake(0, CFArrayGetCount(*attributeList)), (CFStringRef)CFDictionaryGetValue(itemPlist, kSecAttrAccessGroup))){
2461 CFArrayAppendValue(*attributeList, (CFStringRef)CFDictionaryGetValue(itemPlist, kSecAttrAccessGroup));
2462 }//copy access group to array
2463 CFReleaseNull(itemPlist);
2464 } else {
2465 const uint8_t *d = CFDataGetBytePtr(digest);
2466 CFStringRef hexder = CFDataCopyHexString(der);
2467 secnoticeq("engine", "%@:%@ object %02X%02X%02X%02X der: %@ dropping from manifest: %@",
2468 engine->myID, SOSPeerGetID(peer), d[0], d[1], d[2], d[3], hexder, localError);
2469 CFReleaseNull(hexder);
2470 CFReleaseNull(message);
2471 // Since we can't send these objects let's assume they are bad too?
2472 SOSChangesAppendDelete(changes, digest);
2473 }
2474
2475 objectsSize += objectLen;
2476 if (objectsSize > kSOSMessageMaxObjectsSize)
2477 *stop = true;
2478 }
2479 CFErrorPropagate(dsfeError, error); // this also releases dsfeError
2480 dsfeError = NULL;
2481 CFReleaseSafe(der);
2482 CFReleaseSafe(digest);
2483 })) {
2484 CFReleaseNull(message);
2485 }
2486 if (dv.count){
2487 objectsSent = SOSManifestCreateWithDigestVector(&dv, error);
2488 }
2489 if (CFArrayGetCount(changes)) {
2490 CFErrorRef localError = NULL;
2491 if (!SOSEngineUpdateChanges_locked(engine, NULL, kSOSDataSourceTransactionDidCommit, kSOSDataSourceSOSTransaction, changes, &localError))
2492 secerror("SOSEngineUpdateChanges_locked: %@ failed: %@", changes, localError);
2493 CFReleaseSafe(localError);
2494 CFAssignRetained(local, SOSEngineCopyLocalPeerManifest_locked(engine, peer, error));
2495 }
2496 CFReleaseSafe(changes);
2497 SOSDigestVectorFree(&dv);
2498 CFReleaseNull(dsfeError);
2499 }
2500 } else {
2501 // If we have no confirmed manifest, we want all pendedObjects going out as a manifest
2502 objectsSent = CFRetainSafe(pendingObjects);
2503 }
2504
2505 if (confirmed || SOSManifestGetCount(missing) || SOSManifestGetCount(extra) || objectsSent) {
2506 SOSManifestRef allExtra = SOSManifestCreateUnion(extra, objectsSent, error);
2507 proposed = SOSManifestCreateWithPatch(confirmed, missing, allExtra, error);
2508 CFReleaseNull(allExtra);
2509 }
2510
2511 SOSManifestRef sender = local;
2512 // We actually send the remote peer its own digest.
2513 // Note that both pendingObjects and unwanted may have been changed, so we get them again
2514 if (SOSManifestGetCount(SOSPeerGetPendingObjects(peer))==0 && SOSManifestGetCount(extra)==0 &&
2515 SOSManifestGetCount(missing)==0 && SOSManifestGetCount(SOSPeerGetUnwantedManifest(peer))!=0) {
2516 secnoticeq("engine", "%@:%@: only have differences in unwanted set; lying to peer to stop sync",engine->myID, SOSPeerGetID(peer));
2517 sender = confirmed;
2518 }
2519
2520 if (!SOSMessageSetManifests(message, sender, confirmed, proposed, proposed, confirmed ? objectsSent : NULL, error)) {
2521 secnoticeq("engine", "%@:%@: failed to set message manifests",engine->myID, SOSPeerGetID(peer));
2522 CFReleaseNull(message);
2523 }
2524
2525 CFReleaseNull(objectsSent);
2526
2527 if (message) {
2528 result = SOSMessageCreateData(message, SOSPeerNextSequenceNumber(peer), error);
2529 }
2530
2531 if (result) {
2532 SOSEnginePeerMessageSentCallback* pmsc = malloc(sizeof(SOSEnginePeerMessageSentCallback));
2533 memset(pmsc, 0, sizeof(SOSEnginePeerMessageSentCallback));
2534 pmsc->engine = engine; CFRetain(pmsc->engine);
2535 pmsc->peer = CFRetainSafe(peer);
2536 pmsc->local = CFRetainSafe(local);
2537 pmsc->proposed = CFRetainSafe(proposed);
2538 pmsc->message = CFRetainSafe(message);
2539 pmsc->confirmed = CFRetainSafe(confirmed);
2540
2541 SOSEngineMessageCallbackSetCallback(pmsc, ^(bool success) {
2542 // Have to copy pmsc so it'll still be around during the dispatch_async
2543 SOSEnginePeerMessageSentCallback* pmsc2 = malloc(sizeof(SOSEnginePeerMessageSentCallback));
2544 memset(pmsc2, 0, sizeof(SOSEnginePeerMessageSentCallback));
2545 pmsc2->engine = pmsc->engine; CFRetain(pmsc2->engine);
2546 pmsc2->peer = CFRetainSafe(pmsc->peer);
2547 pmsc2->local = CFRetainSafe(pmsc->local);
2548 pmsc2->proposed = CFRetainSafe(pmsc->proposed);
2549 pmsc2->message = CFRetainSafe(pmsc->message);
2550 pmsc2->confirmed = CFRetainSafe(pmsc->confirmed);
2551
2552 dispatch_async(pmsc->engine->queue, ^{
2553 if (success) {
2554 SOSPeerSetMustSendMessage(pmsc2->peer, false);
2555 if (!pmsc2->confirmed && !pmsc2->proposed) {
2556 SOSPeerSetSendObjects(pmsc2->peer, true);
2557 secnoticeq("engine", "%@:%@ sendObjects=true L:%@", pmsc2->engine->myID, SOSPeerGetID(pmsc2->peer), pmsc2->local);
2558 }
2559 SOSPeerAddLocalManifest(pmsc2->peer, pmsc2->local);
2560 SOSPeerAddProposedManifest(pmsc2->peer, pmsc2->proposed);
2561 secnoticeq("engine", "send %@:%@ %@", pmsc2->engine->myID, SOSPeerGetID(pmsc2->peer), pmsc2->message);
2562 //SOSEngineCheckPeerIntegrity(engine, peer, NULL);
2563 } else {
2564 secerror("%@:%@ failed to send %@", pmsc2->engine->myID, SOSPeerGetID(pmsc2->peer), pmsc2->message);
2565 }
2566 SOSEngineFreeMessageCallback(pmsc2);
2567 });
2568 });
2569
2570 *sent = pmsc;
2571 }
2572
2573 CFReleaseNull(local);
2574 CFReleaseNull(extra);
2575 CFReleaseNull(missing);
2576 CFReleaseNull(message);
2577 CFReleaseNull(proposed);
2578 if (error && *error)
2579 secerror("%@:%@ error in send: %@", engine->myID, SOSPeerGetID(peer), *error);
2580
2581 return result;
2582 }
2583
2584 void SOSEngineMessageCallbackSetCallback(SOSEnginePeerMessageSentCallback *sent, SOSEnginePeerMessageSentBlock block) {
2585 if(sent) {
2586 sent->block = Block_copy(block);
2587 }
2588 }
2589
2590
2591 void SOSEngineMessageCallCallback(SOSEnginePeerMessageSentCallback *sent, bool ok) {
2592 if (sent && sent->block) {
2593 (sent->block)(ok);
2594 }
2595 }
2596
2597 void SOSEngineFreeMessageCallback(SOSEnginePeerMessageSentCallback* psmc) {
2598 if(psmc) {
2599 CFReleaseNull(psmc->engine);
2600 CFReleaseNull(psmc->peer);
2601 CFReleaseNull(psmc->coder);
2602 CFReleaseNull(psmc->local);
2603 CFReleaseNull(psmc->proposed);
2604 CFReleaseNull(psmc->message);
2605 CFReleaseNull(psmc->confirmed);
2606
2607 if(psmc->block) {
2608 Block_release(psmc->block);
2609 }
2610
2611 free(psmc);
2612 }
2613 }
2614
2615 static void SOSEngineLogItemError(SOSEngineRef engine, CFStringRef peerID, CFDataRef key, CFDataRef optionalDigest, const char *where, CFErrorRef error) {
2616 if (!optionalDigest) {
2617 const uint8_t *d = CFDataGetBytePtr(key);
2618 secwarning("%@:%@ object %02X%02X%02X%02X %s: %@", engine->myID, peerID, d[0], d[1], d[2], d[3], where, error ? (CFTypeRef)error : CFSTR(""));
2619 } else {
2620 const uint8_t *d = CFDataGetBytePtr(key);
2621 const uint8_t *e = CFDataGetBytePtr(optionalDigest);
2622 secwarning("%@:%@ object %02X%02X%02X%02X is really %02X%02X%02X%02X dropping from local manifest", engine->myID, peerID, d[0], d[1], d[2], d[3], e[0], e[1], e[2], e[3]);
2623 }
2624 }
2625
2626 static bool SOSEngineWriteToBackup_locked(SOSEngineRef engine, SOSPeerRef peer, bool rewriteComplete, bool *didWrite, bool *incomplete, CFErrorRef *error) {
2627 __block bool ok = SOSPeerWritePendingReset(peer, error);
2628 if (!ok || !SOSPeerGetKeyBag(peer))
2629 return ok;
2630 __block SOSManifestRef local = SOSEngineCopyLocalPeerManifest_locked(engine, peer, error);
2631 __block SOSManifestRef proposed = SOSPeerGetProposedManifest(peer);
2632 __block bool notify = true;
2633 SOSManifestRef pendingObjects = NULL;
2634 SOSManifestRef missing = NULL;
2635 CFStringRef peerID = SOSPeerGetID(peer);
2636
2637 ok &= SOSManifestDiff(proposed, local, &missing, &pendingObjects, error);
2638
2639 secnoticeq("engine", "%@:%@: Send state for peer [%s%s%s] O: %zu, M: %zu", engine->myID, peerID,
2640 local ? "L":"l",
2641 proposed ? "P":"0",
2642 pendingObjects ? "O":"0",
2643 SOSManifestGetCount(pendingObjects),
2644 SOSManifestGetCount(missing));
2645
2646 if (SOSManifestGetCount(missing) == 0 && SOSManifestGetCount(pendingObjects) == 0) {
2647 // proposed == local (faster test than CFEqualSafe above), since we
2648 // already did the SOSManifestDiff
2649 if (rewriteComplete) {
2650 notify = false;
2651 } else {
2652 secnoticeq("engine", "%@:%@ backup still done", engine->myID, peer);
2653 goto done;
2654 }
2655 }
2656 ok &= SOSPeerAppendToJournal(peer, error, ^(FILE *journalFile, keybag_handle_t kbhandle) {
2657 SOSManifestRef objectsSent = NULL;
2658 __block struct SOSDigestVector dvdel = SOSDigestVectorInit;
2659 __block struct SOSDigestVector dvadd = SOSDigestVectorInit;
2660 SOSManifestForEach(missing, ^(CFDataRef key, bool *stop) {
2661 CFErrorRef localError = NULL;
2662 if (ftello(journalFile) > kSOSBackupMaxFileSize) {
2663 // Highwatermark hit on file.
2664 *stop = true;
2665 } else if (SOSBackupEventWriteDelete(journalFile, key, &localError)) {
2666 SOSDigestVectorAppend(&dvdel, CFDataGetBytePtr(key));
2667 } else {
2668 SOSEngineLogItemError(engine, peerID, key, NULL, "in SOSPeerWriteDelete", localError);
2669 CFErrorPropagate(localError, error);
2670 // TODO: Update of missing so proposed is updated properly
2671 *stop = true; // Disk full?
2672 ok = false;
2673 }
2674 });
2675 if (ok && SOSManifestGetCount(pendingObjects)) {
2676 CFMutableArrayRef changes = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
2677 ok &= SOSDataSourceForEachObject(engine->dataSource, NULL, pendingObjects, error, ^void(CFDataRef key, SOSObjectRef object, bool *stop) {
2678 CFErrorRef localError = NULL;
2679 CFDataRef digest = NULL;
2680 CFDictionaryRef backupItem = NULL;
2681 if (ftello(journalFile) > kSOSBackupMaxFileSize) {
2682 // Highwatermark hit on file.
2683 *stop = true;
2684 } else if (!object) {
2685 SOSEngineLogItemError(engine, peerID, key, NULL, "dropping from manifest: not found in datasource", localError);
2686 SOSChangesAppendDelete(changes, key);
2687 } else if (!(backupItem = SOSObjectCopyBackup(engine->dataSource, object, kbhandle, &localError))
2688 || !(digest = SOSObjectCopyDigest(engine->dataSource, object, &localError))) {
2689 if (SecErrorGetOSStatus(localError) == errSecDecode) {
2690 // Decode error, we need to drop these objects from our manifests
2691 SOSEngineLogItemError(engine, peerID, key, NULL, "dropping from manifest", localError);
2692 SOSChangesAppendDelete(changes, key);
2693 CFRelease(localError);
2694 } else {
2695 // Stop iterating and propagate out all other errors.
2696 SOSEngineLogItemError(engine, peerID, key, NULL, "in SOSDataSourceForEachObject", localError);
2697 *stop = true;
2698 CFErrorPropagate(localError, error);
2699 ok = false;
2700 }
2701 } else {
2702 if (!CFEqual(key, digest)) {
2703 SOSEngineLogItemError(engine, peerID, key, digest, "", NULL);
2704 SOSChangesAppendDelete(changes, key);
2705 SOSChangesAppendAdd(changes, object); // This is new behaviour but we think it's more correct
2706 }
2707
2708 if (SOSBackupEventWriteAdd(journalFile, backupItem, &localError)) {
2709 SOSDigestVectorAppend(&dvadd, CFDataGetBytePtr(digest));
2710 } else {
2711 SOSEngineLogItemError(engine, peerID, key, NULL, "in SOSPeerWriteAdd", localError);
2712 *stop = true; // Disk full?
2713 CFErrorPropagate(localError, error);
2714 ok = false;
2715 }
2716 }
2717 CFReleaseSafe(backupItem);
2718 CFReleaseSafe(digest);
2719 });
2720 if (CFArrayGetCount(changes)) {
2721 CFErrorRef localError = NULL;
2722 if (!SOSEngineUpdateChanges_locked(engine, NULL, kSOSDataSourceTransactionDidCommit, kSOSDataSourceSOSTransaction, changes, &localError))
2723 secerror("SOSEngineUpdateChanges_locked: %@ failed: %@", changes, localError);
2724 CFReleaseSafe(localError);
2725 // Since calling SOSEngineUpdateChanges_locked might cause local to change and might cause the backup peer to update proposed, refetch them here.
2726 CFAssignRetained(local, SOSEngineCopyLocalPeerManifest_locked(engine, peer, error));
2727 proposed = SOSPeerGetProposedManifest(peer);
2728 }
2729 CFReleaseSafe(changes);
2730 }
2731
2732 if (dvadd.count || (proposed && dvdel.count)) {
2733 *didWrite = true;
2734 SOSManifestRef deleted = SOSManifestCreateWithDigestVector(&dvdel, error);
2735 SOSManifestRef objectsSent = SOSManifestCreateWithDigestVector(&dvadd, error);
2736 SOSManifestRef newProposed = SOSManifestCreateWithPatch(proposed, deleted, objectsSent, error);
2737 CFReleaseSafe(deleted);
2738 CFReleaseSafe(objectsSent);
2739 SOSPeerSetProposedManifest(peer, newProposed);
2740 CFReleaseSafe(newProposed);
2741 proposed = SOSPeerGetProposedManifest(peer);
2742 }
2743 SOSDigestVectorFree(&dvdel);
2744 SOSDigestVectorFree(&dvadd);
2745
2746 // TODO: If proposed is NULL, and local is empty we should still consider ourselves done.
2747 // It so happens this can't happen in practice today since there is at least a backupbag
2748 // in the backup, but this is a bug waiting to rear its head in the future.
2749 if (ok && CFEqualSafe(local, proposed)) {
2750 CFErrorRef localError = NULL;
2751 if (SOSBackupEventWriteCompleteMarker(journalFile, 899, &localError)) {
2752 SOSPeerSetSendObjects(peer, true);
2753 *didWrite = true;
2754 secnoticeq("backup", "%@:%@ backup done%s", engine->myID, peerID, notify ? " notifying sbd" : "");
2755 // TODO: Now switch to changes based writing to backup sync.
2756 // Currently we leave changes enabled but we probably shouldn't
2757 } else {
2758 secwarning("%@:%@ in SOSBackupPeerWriteCompleteMarker: %@", engine->myID, peerID, localError);
2759 ok = false;
2760 *incomplete = true;
2761 CFErrorPropagate(localError, error);
2762 }
2763 } else {
2764 secnoticeq("backup", "%@:%@ backup incomplete [%zu/%zu]%s", engine->myID, peerID, SOSManifestGetCount(local), SOSManifestGetCount(proposed), notify ? " notifying sbd" : "");
2765 *incomplete = true;
2766 }
2767 CFReleaseNull(objectsSent);
2768 });
2769 if (notify)
2770 SOSBackupPeerPostNotification("writing changes to backup");
2771
2772 done:
2773 CFReleaseSafe(local);
2774 CFReleaseNull(pendingObjects);
2775 CFReleaseNull(missing);
2776
2777 return ok;
2778 }
2779
2780 CF_RETURNS_RETAINED CFSetRef SOSEngineSyncWithBackupPeers(SOSEngineRef engine, CFSetRef /* CFStringRef */ peers, bool forceReset, CFErrorRef *error)
2781 {
2782 __block bool incomplete = false;
2783 CFMutableSetRef handledSet = CFSetCreateMutableForCFTypes(kCFAllocatorDefault);
2784
2785 bool ok = SOSEngineDoTxnOnQueue(engine, error, ^(SOSTransactionRef txn, bool *commit) {
2786 __block bool dirty = false;
2787 CFSetForEach(peers, ^(const void *value) {
2788 bool report_handled = true;
2789 CFErrorRef localError = NULL;
2790 SOSPeerRef peer = NULL;
2791 CFStringRef peerID = asString(value, &localError);
2792 require_action_quiet(peerID, done, report_handled = false);
2793
2794 peer = SOSEngineCopyPeerWithID_locked(engine, peerID, &localError);
2795 require_quiet(peerID, done);
2796
2797 if (SOSPeerMapEntryIsBackup(peer)) {
2798 if(forceReset) {
2799 SOSPeerSetMustSendMessage(peer, true);
2800 }
2801
2802 report_handled = SOSEngineWriteToBackup_locked(engine, peer, false, &dirty, &incomplete, &localError);
2803 }
2804
2805 done:
2806 if (localError) {
2807 secnotice("engine-sync", "Failed to process sync for %@: %@", peerID, localError);
2808 }
2809 if (report_handled) {
2810 CFSetAddValue(handledSet, peerID);
2811 }
2812 CFReleaseNull(localError);
2813 CFReleaseNull(peer);
2814 });
2815
2816 if (dirty) {
2817 CFErrorRef saveError = NULL;
2818 if (!SOSEngineSave(engine, txn, &saveError)) {
2819 secnotice("engine-save", "Failed to save engine: %@", saveError);
2820 }
2821 }
2822 });
2823 if (incomplete) {
2824 // Ensure we get called again in a while (after a backup timeout)
2825 // sbd will do this since we never wrote a complete marker.
2826 // TODO: This relies on us not writing complete marker for update
2827 // event while we havn't finished a full backup, which we currently still do.
2828 }
2829 if (!ok)
2830 CFReleaseNull(handledSet);
2831
2832 return handledSet;
2833 }
2834
2835 bool SOSEngineHandleMessage(SOSEngineRef engine, CFStringRef peerID,
2836 CFDataRef raw_message, CFErrorRef *error)
2837 {
2838 __block bool result = true;
2839 __block bool somethingChanged = false;
2840 SOSMessageRef message = SOSMessageCreateWithData(kCFAllocatorDefault, raw_message, error);
2841 result &= message && SOSEngineDoTxnOnQueue(engine, error, ^(SOSTransactionRef txn, bool *commit) {
2842 result = SOSEngineHandleMessage_locked(engine, peerID, message, txn, commit, &somethingChanged, error);
2843 });
2844 CFReleaseSafe(message);
2845 if (somethingChanged)
2846 SecKeychainChanged();
2847 return result;
2848 }
2849
2850 void SOSEngineCircleChanged(SOSEngineRef engine, CFStringRef myPeerID, CFArrayRef trustedPeers, CFArrayRef untrustedPeers) {
2851 __block bool peersOrViewsChanged = false;
2852 SOSEngineDoOnQueue(engine, ^{
2853 peersOrViewsChanged = SOSEngineCircleChanged_locked(engine, myPeerID, trustedPeers, untrustedPeers);
2854
2855 // We should probably get a more precise list of peers that actually need talking to
2856 if (peersOrViewsChanged && engine->myID && CFArrayGetCount(engine->peerIDs) != 0)
2857 SOSCCRequestSyncWithPeersList(engine->peerIDs);
2858 });
2859
2860 __block bool ok = true;
2861 __block CFErrorRef localError = NULL;
2862 ok &= SOSEngineDoTxnOnQueue(engine, &localError, ^(SOSTransactionRef txn, bool *commit) {
2863 ok = *commit = SOSEngineSave(engine, txn, &localError);
2864 });
2865 if (!ok) {
2866 secerror("failed to save engine state: %@", localError);
2867 CFReleaseSafe(localError);
2868 }
2869
2870 }
2871
2872 SOSManifestRef SOSEngineCopyManifest(SOSEngineRef engine, CFErrorRef *error) {
2873 __block SOSManifestRef result = NULL;
2874 SOSEngineDoOnQueue(engine, ^{
2875 result = SOSEngineCopyManifestWithViewNameSet_locked(engine, SOSViewsGetV0ViewSet(), error);
2876 });
2877 return result;
2878 }
2879
2880 SOSManifestRef SOSEngineCopyLocalPeerManifest(SOSEngineRef engine, SOSPeerRef peer, CFErrorRef *error) {
2881 __block SOSManifestRef result = NULL;
2882 SOSEngineDoOnQueue(engine, ^{
2883 result = SOSEngineCopyLocalPeerManifest_locked(engine, peer, error);
2884 });
2885 return result;
2886 }
2887
2888 bool SOSEngineUpdateChanges(SOSEngineRef engine, SOSDataSourceTransactionSource source, CFArrayRef changes, CFErrorRef *error) {
2889 __block bool result = true;
2890 SOSEngineDoOnQueue(engine, ^{
2891 result = SOSEngineUpdateChanges_locked(engine, NULL, kSOSDataSourceTransactionDidCommit, source, changes, error);
2892 });
2893 return result;
2894 }
2895
2896 //
2897 // Peer state layout. WRONG! It's an array now
2898 // The peer state is an array.
2899 // The first element of the array is a dictionary with any number of keys and
2900 // values in it (for future expansion) such as changing the digest size or type
2901 // or remebering boolean flags for a peers sake.
2902 // The next three are special in that they are manifest digests with special
2903 // meaning and rules as to how they are treated (These are dynamically updated
2904 // based on database activity so they have a fully history of all changes made
2905 // to the local db. The first is the manifest representing the pendingObjects
2906 // to send to the other peer. This is normally only ever appending to, and in
2907 // particular with transactions originating from the Keychain API that affect
2908 // syncable items will need to add the new objects digests to the pendingObjects list
2909 // while adding the digests of any tombstones encountered to the extra list.
2910
2911 SOSPeerRef SOSEngineCopyPeerWithID(SOSEngineRef engine, CFStringRef peer_id, CFErrorRef *error) {
2912 __block SOSPeerRef peer = NULL;
2913 SOSEngineDoOnQueue(engine, ^{
2914 peer = SOSEngineCopyPeerWithID_locked(engine, peer_id, error);
2915 });
2916 return peer;
2917 }
2918
2919 bool SOSEngineForPeerID(SOSEngineRef engine, CFStringRef peerID, CFErrorRef *error, void (^forPeer)(SOSTransactionRef txn, SOSPeerRef peer)) {
2920 __block bool ok = true;
2921 SOSDataSourceReadWithCommitQueue(engine->dataSource, error, ^(SOSTransactionRef txn) {
2922 SOSEngineDoOnQueue(engine, ^{
2923 SOSPeerRef peer = SOSEngineCopyPeerWithID_locked(engine, peerID, error);
2924 if (peer) {
2925 forPeer(txn, peer);
2926 CFRelease(peer);
2927 } else {
2928 ok = false;
2929 }
2930 });
2931 });
2932
2933 return ok;
2934 }
2935
2936 bool SOSEngineWithPeerID(SOSEngineRef engine, CFStringRef peerID, CFErrorRef *error, void (^with)(SOSPeerRef peer, SOSCoderRef coder, SOSDataSourceRef dataSource, SOSTransactionRef txn, bool *forceSaveState)) {
2937 __block bool result = true;
2938 result &= SOSEngineDoTxnOnQueue(engine, error, ^(SOSTransactionRef txn, bool *commit) {
2939 SOSPeerRef peer = SOSEngineCopyPeerWithID_locked(engine, peerID, error);
2940 if (!peer) {
2941 result = SOSErrorCreate(kSOSErrorPeerNotFound, error, NULL, CFSTR("Engine has no peer for %@"), peerID);
2942 } else {
2943 bool saveState = false;
2944 SOSCoderRef coder = SOSEngineGetCoderInTx_locked(engine, txn, peerID, NULL);
2945 with(peer, coder, engine->dataSource, txn, &saveState);
2946 CFReleaseSafe(peer);
2947 if (saveState)
2948 result = SOSEngineSave(engine, txn, error);
2949 // TODO: Don't commit if engineSave fails?
2950 }
2951 });
2952
2953 return result;
2954 }
2955
2956 CFDataRef SOSEngineCreateMessageToSyncToPeer(SOSEngineRef engine, CFStringRef peerID, CFMutableArrayRef *attributeList, SOSEnginePeerMessageSentCallback **sentCallback, CFErrorRef *error){
2957 __block CFDataRef message = NULL;
2958 SOSEngineForPeerID(engine, peerID, error, ^(SOSTransactionRef txn, SOSPeerRef peer) {
2959 message = SOSEngineCreateMessage_locked(engine, txn, peer, attributeList, error, sentCallback);
2960 });
2961 return message;
2962 }
2963
2964 bool SOSEnginePeerDidConnect(SOSEngineRef engine, CFStringRef peerID, CFErrorRef *error) {
2965 return SOSEngineWithPeerID(engine, peerID, error, ^(SOSPeerRef peer, SOSCoderRef coder, SOSDataSourceRef dataSource, SOSTransactionRef txn, bool *saveState) {
2966 *saveState = SOSPeerDidConnect(peer);
2967 });
2968 }
2969
2970 bool SOSEngineSetPeerConfirmedManifest(SOSEngineRef engine, CFStringRef backupName,
2971 CFDataRef keybagDigest, CFDataRef manifestData, CFErrorRef *error) {
2972 __block bool ok = true;
2973
2974 ok &= SOSEngineForPeerID(engine, backupName, error, ^(SOSTransactionRef txn, SOSPeerRef peer) {
2975 bool dirty = false;
2976 bool incomplete = false;
2977 SOSManifestRef confirmed = NULL;
2978 CFDataRef keybag = SOSPeerGetKeyBag(peer);
2979 CFDataRef computedKeybagDigest = keybag ? CFDataCopySHA1Digest(keybag, NULL) : NULL;
2980 if (CFEqualSafe(keybagDigest, computedKeybagDigest)) {
2981 ok = confirmed = SOSManifestCreateWithData(manifestData, error);
2982 if (ok) {
2983 // Set both confirmed and proposed (confirmed is just
2984 // for debug status, proposed is actually what's used
2985 // by the backup peer).
2986 SOSPeerSetConfirmedManifest(peer, confirmed);
2987 SOSPeerSetProposedManifest(peer, confirmed);
2988 }
2989 } else {
2990 // sbd missed a reset event, send it again
2991 // Force SOSEngineWriteToBackup_locked to call SOSPeerWriteReset, which clears
2992 // confirmed and proposed manifests and writes the keybag to the journal.
2993 SOSPeerSetMustSendMessage(peer, true);
2994 }
2995
2996 // Stop changes from writing complete markers, unless SOSEngineWriteToBackup_locked() detects we are in sync
2997 SOSPeerSetSendObjects(peer, false);
2998 // Write data for this peer if we can, technically not needed for non legacy protocol support all the time.
2999 ok = SOSEngineWriteToBackup_locked(engine, peer, true, &dirty, &incomplete, error);
3000
3001 if (!ok && error && SecErrorGetOSStatus(*error) == errSecInteractionNotAllowed) {
3002 SOSEnsureBackupWhileUnlocked();
3003 }
3004
3005 CFReleaseSafe(confirmed);
3006 CFReleaseSafe(computedKeybagDigest);
3007 });
3008 return ok;
3009 }
3010
3011 CFArrayRef SOSEngineCopyBackupPeerNames(SOSEngineRef engine, CFErrorRef *error) {
3012 __block CFMutableArrayRef backupNames = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
3013 SOSEngineForEachBackupPeer(engine, ^(SOSPeerRef peer) {
3014 CFArrayAppendValue(backupNames, SOSPeerGetID(peer));
3015 });
3016 return backupNames;
3017 }
3018
3019 static CFMutableDictionaryRef SOSEngineCreateStateDictionary(CFStringRef peerID, SOSManifestRef manifest, CFSetRef vns, CFStringRef coderString) {
3020 CFNumberRef manifestCount = CFNumberCreateWithCFIndex(kCFAllocatorDefault, SOSManifestGetCount(manifest));
3021 CFDataRef manifestHash = SOSManifestGetDigest(manifest, NULL);
3022 CFMutableDictionaryRef result = CFDictionaryCreateMutableForCFTypesWithSafe(kCFAllocatorDefault,
3023 kSOSCCEngineStatePeerIDKey, peerID,
3024 kSOSCCEngineStateManifestCountKey, manifestCount,
3025 kSOSCCEngineStateManifestHashKey, manifestHash,
3026 kSOSCCEngineStateSyncSetKey, asSet(vns, NULL),
3027 kSOSCCEngineStateCoderKey, coderString,
3028 NULL);
3029 CFReleaseNull(manifestCount);
3030 return result;
3031 }
3032
3033 static void SOSEngineAppendStateDictionary(CFMutableArrayRef stateArray, CFStringRef peerID, SOSManifestRef manifest, CFSetRef vns, CFStringRef coderString) {
3034 CFMutableDictionaryRef newState = SOSEngineCreateStateDictionary(peerID, manifest, vns, coderString);
3035 CFArrayAppendValue(stateArray, newState);
3036 CFReleaseNull(newState);
3037 }
3038
3039 static CFArrayRef SOSEngineCopyPeerConfirmedDigests_locked(SOSEngineRef engine, CFErrorRef *error) {
3040 CFMutableArrayRef result = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
3041 CFDictionaryForEach(engine->viewNameSet2ChangeTracker, ^(const void *vns, const void *ct) {
3042 SOSManifestRef manifest = SOSEngineCopyManifestWithViewNameSet_locked(engine, vns, error);
3043 SOSEngineAppendStateDictionary(result, NULL, manifest, vns, NULL);
3044 CFReleaseNull(manifest);
3045 });
3046
3047 // Copy other peers even if we aren't in the circle, since we're observing it.
3048 SOSEngineForEachPeer_locked(engine, ^(SOSPeerRef peer) {
3049 CFTypeRef coderObject = engine->coders ? CFDictionaryGetValue(engine->coders, SOSPeerGetID(peer)) : CFSTR("Coders not loaded.");
3050 CFStringRef coderState = coderObject ? CFCopyDescription(coderObject) : NULL;
3051 SOSEngineAppendStateDictionary(result, SOSPeerGetID(peer), SOSPeerGetConfirmedManifest(peer), SOSPeerGetViewNameSet(peer), coderState);
3052 CFReleaseNull(coderState);
3053 });
3054 return result;
3055 }
3056
3057 CFArrayRef SOSEngineCopyPeerConfirmedDigests(SOSEngineRef engine, CFErrorRef *error) {
3058 __block CFArrayRef result = NULL;
3059 SOSEngineDoOnQueue(engine, ^{
3060 result = SOSEngineCopyPeerConfirmedDigests_locked(engine, error);
3061 });
3062 return result;
3063 }
3064
3065 SOSDataSourceRef SOSEngineGetDataSource(SOSEngineRef engine) {
3066 return engine->dataSource;
3067 }
3068
3069 #define ENGINELOGSTATE "engineLogState"
3070 void SOSEngineLogState(SOSEngineRef engine) {
3071 CFErrorRef error = NULL;
3072 CFArrayRef confirmedDigests = NULL;
3073
3074 secnotice(ENGINELOGSTATE, "Start");
3075
3076 require_action_quiet(engine, retOut, secnotice(ENGINELOGSTATE, "No Engine Available"));
3077 confirmedDigests = SOSEngineCopyPeerConfirmedDigests(engine, &error);
3078 require_action_quiet(confirmedDigests, retOut, secnotice(ENGINELOGSTATE, "No engine peers: %@\n", error));
3079
3080 SOSCCForEachEngineStateAsStringFromArray(confirmedDigests, ^(CFStringRef onePeerDescription) {
3081 secnotice(ENGINELOGSTATE, "%@", onePeerDescription);
3082 });
3083
3084 retOut:
3085 CFReleaseNull(error);
3086 CFReleaseNull(confirmedDigests);
3087 secnotice(ENGINELOGSTATE, "Finish");
3088
3089 return;
3090 }
3091
3092 //For Testing
3093 void TestSOSEngineDoOnQueue(CFTypeRef engine, dispatch_block_t action)
3094 {
3095 dispatch_sync(((SOSEngineRef)engine)->queue, action);
3096 }
3097 CFMutableDictionaryRef TestSOSEngineGetCoders(CFTypeRef engine){
3098 return ((SOSEngineRef)engine)->coders;
3099 }
3100
3101 bool TestSOSEngineDoTxnOnQueue(CFTypeRef engine, CFErrorRef *error, void(^transaction)(SOSTransactionRef txn, bool *commit))
3102 {
3103 return SOSDataSourceWithCommitQueue(((SOSEngineRef)engine)->dataSource, error, ^(SOSTransactionRef txn, bool *commit) {
3104 TestSOSEngineDoOnQueue((SOSEngineRef)engine, ^{ transaction(txn, commit); });
3105 });
3106 }
3107 bool SOSEngineGetCodersNeedSaving(SOSEngineRef engine){
3108 return engine->codersNeedSaving;
3109 }
3110
3111 void SOSEngineSetCodersNeedSaving(SOSEngineRef engine, bool saved){
3112 engine->codersNeedSaving = saved;
3113 }
3114
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