OSX/sec/SOSCircle/SecureObjectSync/SOSAccountUpdate.m

   1 //
   2 //  SOSAccountUpdate.c
   3 //  sec
   4 //
   5
   6 #include "SOSAccountPriv.h"
   7 #include "SOSAccountLog.h"
   8
   9 #include <Security/SecureObjectSync/SOSTransportCircleKVS.h>
  10 #include <Security/SecureObjectSync/SOSTransport.h>
  11 #include <Security/SecureObjectSync/SOSViews.h>
  12 #include <Security/SecureObjectSync/SOSPeerInfoCollections.h>
  13 #include <Security/SecureObjectSync/SOSPeerInfoPriv.h>
  14 #include <Security/SecureObjectSync/SOSPeerInfoV2.h>
  15 #include <Security/SecureObjectSync/SOSPeerInfoDER.h>
  16 #include <Security/SecureObjectSync/SOSBackupSliceKeyBag.h>
  17 #include <Security/SecureObjectSync/SOSAccountGhost.h>
  18
  19 #import <Security/SecureObjectSync/SOSAccountTrust.h>
  20 #import <Security/SecureObjectSync/SOSAccountTrustClassic+Circle.h>
  21 #import <Security/SecureObjectSync/SOSAccountTrustClassic+Expansion.h>
  22
  23 static void DifferenceAndCall(CFSetRef old_members, CFSetRef new_members, void (^updatedCircle)(CFSetRef additions, CFSetRef removals))
  24 {
  25     CFMutableSetRef additions = CFSetCreateMutableCopy(kCFAllocatorDefault, 0, new_members);
  26     CFMutableSetRef removals = CFSetCreateMutableCopy(kCFAllocatorDefault, 0, old_members);
  27
  28
  29     CFSetForEach(old_members, ^(const void * value) {
  30         CFSetRemoveValue(additions, value);
  31     });
  32
  33     CFSetForEach(new_members, ^(const void * value) {
  34         CFSetRemoveValue(removals, value);
  35     });
  36
  37     updatedCircle(additions, removals);
  38
  39     CFReleaseSafe(additions);
  40     CFReleaseSafe(removals);
  41 }
  42 static CFMutableSetRef SOSAccountCopyIntersectedViews(CFSetRef peerViews, CFSetRef myViews) {
  43     __block CFMutableSetRef views = CFSetCreateMutable(NULL, 0, &kCFTypeSetCallBacks);
  44     if (peerViews && myViews) CFSetForEach(peerViews, ^(const void *view) {
  45         if (CFSetContainsValue(myViews, view)) {
  46             CFSetAddValue(views, view);
  47         }
  48     });
  49     return views;
  50 }
  51
  52 static inline bool isSyncing(SOSPeerInfoRef peer, SecKeyRef upub) {
  53     if(!SOSPeerInfoApplicationVerify(peer, upub, NULL)) return false;
  54     if(SOSPeerInfoIsRetirementTicket(peer)) return false;
  55     return true;
  56 }
  57
  58 static bool isBackupSOSRing(SOSRingRef ring)
  59 {
  60     return isSOSRing(ring) && (kSOSRingBackup == SOSRingGetType(ring));
  61 }
  62
  63 static void SOSAccountAppendPeerMetasForViewBackups(SOSAccount* account, CFSetRef views, CFMutableArrayRef appendTo)
  64 {
  65     CFMutableDictionaryRef ringToViewTable = NULL;
  66
  67     if([account getCircleStatus:NULL] != kSOSCCInCircle)
  68         return;
  69
  70     if(!(SOSAccountHasCompletedInitialSync(account))){
  71         secnotice("backup", "Haven't finished initial backup syncing, not registering backup metas with engine");
  72         return;
  73     }
  74     if(!SOSPeerInfoV2DictionaryHasData(account.peerInfo, sBackupKeyKey)){
  75         secnotice("backup", "No key to backup to, we don't enable individual view backups");
  76         return;
  77     }
  78     ringToViewTable = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
  79
  80     CFSetForEach(views, ^(const void *value) {
  81         CFStringRef viewName = value;
  82         if (isString(viewName) && !CFEqualSafe(viewName, kSOSViewKeychainV0)) {
  83             CFStringRef ringName = SOSBackupCopyRingNameForView(viewName);
  84             viewName = ringName;
  85             SOSRingRef ring = [account.trust copyRing:ringName err:NULL];
  86             if (ring && isBackupSOSRing(ring)) {
  87                 CFTypeRef currentValue = (CFTypeRef) CFDictionaryGetValue(ringToViewTable, ring);
  88
  89                 if (isSet(currentValue)) {
  90                     CFSetAddValue((CFMutableSetRef)currentValue, viewName);
  91                 } else {
  92                     CFMutableSetRef viewNameSet = CFSetCreateMutableForCFTypes(kCFAllocatorDefault);
  93                     CFSetAddValue(viewNameSet, viewName);
  94
  95                     CFDictionarySetValue(ringToViewTable, ring, viewNameSet);
  96                     CFReleaseNull(viewNameSet);
  97                 }
  98             } else {
  99                 secwarning("View '%@' not being backed up – ring %@:%@ not backup ring.", viewName, ringName, ring);
 100             }
 101             CFReleaseNull(ringName);
 102             CFReleaseNull(ring);
 103         }
 104     });
 105
 106     CFDictionaryForEach(ringToViewTable, ^(const void *key, const void *value) {
 107         SOSRingRef ring = (SOSRingRef) key;
 108         CFSetRef viewNames = asSet(value, NULL);
 109         if (isSOSRing(ring) && viewNames) {
 110             if (SOSAccountIntersectsWithOutstanding(account, viewNames)) {
 111                 CFStringSetPerformWithDescription(viewNames, ^(CFStringRef ringViews) {
 112                     secnotice("engine-notify", "Not ready, no peer meta: R: %@ Vs: %@", SOSRingGetName(ring), ringViews);
 113                 });
 114             } else {
 115                 bool meta_added = false;
 116                 CFErrorRef create_error = NULL;
 117                 SOSBackupSliceKeyBagRef key_bag = NULL;
 118                 SOSPeerMetaRef newMeta = NULL;
 119
 120                 CFDataRef ring_payload = SOSRingGetPayload(ring, NULL);
 121                 require_quiet(isData(ring_payload), skip);
 122
 123                 key_bag = SOSBackupSliceKeyBagCreateFromData(kCFAllocatorDefault, ring_payload, &create_error);
 124                 require_quiet(key_bag, skip);
 125
 126                 newMeta = SOSPeerMetaCreateWithComponents(SOSRingGetName(ring), viewNames, ring_payload);
 127                 require_quiet(SecAllocationError(newMeta, &create_error, CFSTR("Didn't make peer meta for: %@"), ring), skip);
 128                 CFArrayAppendValue(appendTo, newMeta);
 129
 130                 CFStringSetPerformWithDescription(viewNames, ^(CFStringRef ringViews) {
 131                     secnotice("engine-notify", "Backup peer meta: R: %@ Vs: %@ VD: %@", SOSRingGetName(ring), ringViews, ring_payload);
 132                 });
 133
 134                 meta_added = true;
 135
 136             skip:
 137                 if (!meta_added) {
 138                     CFStringSetPerformWithDescription(viewNames, ^(CFStringRef ringViews) {
 139                         secerror("Failed to register backup meta from %@ for views %@. Error (%@)", ring, ringViews, create_error);
 140                     });
 141                 }
 142                 CFReleaseNull(newMeta);
 143                 CFReleaseNull(key_bag);
 144                 CFReleaseNull(create_error);
 145             }
 146         }
 147     });
 148
 149     CFReleaseNull(ringToViewTable);
 150 }
 151
 152 bool SOSAccountSyncingV0(SOSAccount* account) {
 153     __block bool syncingV0 = false;
 154     SOSAccountForEachCirclePeerExceptMe(account, ^(SOSPeerInfoRef peer) {
 155         if (SOSPeerInfoIsEnabledView(peer, kSOSViewKeychainV0)) {
 156             syncingV0 = true;
 157         }
 158     });
 159
 160     return syncingV0;
 161 }
 162
 163 void SOSAccountNotifyEngines(SOSAccount* account)
 164 {
 165     SOSAccountTrustClassic *trust = account.trust;
 166     SOSFullPeerInfoRef identity = trust.fullPeerInfo;
 167     SOSCircleRef circle = trust.trustedCircle;
 168
 169     SOSPeerInfoRef myPi = SOSFullPeerInfoGetPeerInfo(identity);
 170     CFStringRef myPi_id = SOSPeerInfoGetPeerID(myPi);
 171     CFMutableArrayRef syncing_peer_metas = NULL;
 172     CFMutableArrayRef zombie_peer_metas = NULL;
 173     CFErrorRef localError = NULL;
 174     SOSPeerMetaRef myMeta = NULL;
 175
 176     if (myPi_id && isSyncing(myPi, account.accountKey) && SOSCircleHasPeer(circle, myPi, NULL)) {
 177         CFMutableSetRef myViews = SOSPeerInfoCopyEnabledViews(myPi);
 178
 179         // We add V0 views to everyone if we see a V0 peer, or a peer with the view explicity enabled
 180         // V2 peers shouldn't be explicity enabling the uber V0 view, though the seeds did.
 181         __block bool addV0Views = SOSAccountSyncingV0(account);
 182
 183         syncing_peer_metas = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
 184         zombie_peer_metas = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
 185         SOSAccountForEachCirclePeerExceptMe(account, ^(SOSPeerInfoRef peer) {
 186             CFMutableArrayRef arrayToAddTo = isSyncing(peer, account.accountKey) ? syncing_peer_metas : zombie_peer_metas;
 187
 188             // Compute views each peer is in that we are also in ourselves
 189             CFMutableSetRef peerEnabledViews = SOSPeerInfoCopyEnabledViews(peer);
 190             CFMutableSetRef views = SOSAccountCopyIntersectedViews(peerEnabledViews, myViews);
 191             CFReleaseNull(peerEnabledViews);
 192
 193             if(addV0Views) {
 194                 CFSetAddValue(views, kSOSViewKeychainV0);
 195             }
 196
 197             CFStringSetPerformWithDescription(views, ^(CFStringRef viewsDescription) {
 198                 secnotice("engine-notify", "Meta: %@: %@", SOSPeerInfoGetPeerID(peer), viewsDescription);
 199             });
 200
 201             SOSPeerMetaRef peerMeta = SOSPeerMetaCreateWithComponents(SOSPeerInfoGetPeerID(peer), views, NULL);
 202             CFReleaseNull(views);
 203
 204             CFArrayAppendValue(arrayToAddTo, peerMeta);
 205             CFReleaseNull(peerMeta);
 206         });
 207
 208         // We don't make a backup peer meta for the magic V0 peer
 209         // Set up all the rest before we munge the set
 210         SOSAccountAppendPeerMetasForViewBackups(account, myViews, syncing_peer_metas);
 211
 212         // If we saw someone else needing V0, we sync V0, too!
 213         if (addV0Views) {
 214             CFSetAddValue(myViews, kSOSViewKeychainV0);
 215         }
 216
 217         CFStringSetPerformWithDescription(myViews, ^(CFStringRef viewsDescription) {
 218             secnotice("engine-notify", "My Meta: %@: %@", myPi_id, viewsDescription);
 219         });
 220         myMeta = SOSPeerMetaCreateWithComponents(myPi_id, myViews, NULL);
 221         CFReleaseSafe(myViews);
 222     }
 223
 224     SOSEngineRef engine = SOSDataSourceFactoryGetEngineForDataSourceName(account.factory, SOSCircleGetName(circle), NULL);
 225     if (engine) {
 226         SOSEngineCircleChanged(engine, myMeta, syncing_peer_metas, zombie_peer_metas);
 227     }
 228
 229     CFReleaseNull(myMeta);
 230     CFReleaseSafe(localError);
 231
 232     CFReleaseNull(syncing_peer_metas);
 233     CFReleaseNull(zombie_peer_metas);
 234 }
 235
 236
 237 // Upcoming call to View Changes Here
 238 void SOSAccountNotifyOfChange(SOSAccount* account, SOSCircleRef oldCircle, SOSCircleRef newCircle)
 239 {
 240     account.circle_rings_retirements_need_attention = true;
 241
 242     CFMutableSetRef old_members = SOSCircleCopyPeers(oldCircle, kCFAllocatorDefault);
 243     CFMutableSetRef new_members = SOSCircleCopyPeers(newCircle, kCFAllocatorDefault);
 244
 245     CFMutableSetRef old_applicants = SOSCircleCopyApplicants(oldCircle, kCFAllocatorDefault);
 246     CFMutableSetRef new_applicants = SOSCircleCopyApplicants(newCircle, kCFAllocatorDefault);
 247
 248     SOSPeerInfoRef me = account.peerInfo;
 249     if(me && CFSetContainsValue(new_members, me))
 250         SOSAccountSetValue(account, kSOSEscrowRecord, kCFNull, NULL); //removing the escrow records from the account object
 251
 252     DifferenceAndCall(old_members, new_members, ^(CFSetRef added_members, CFSetRef removed_members) {
 253         DifferenceAndCall(old_applicants, new_applicants, ^(CFSetRef added_applicants, CFSetRef removed_applicants) {
 254             CFArrayForEach((__bridge CFArrayRef)(account.change_blocks), ^(const void * notificationBlock) {
 255                 secnotice("updates", "calling change block");
 256                 ((__bridge SOSAccountCircleMembershipChangeBlock) notificationBlock)(newCircle, added_members, removed_members, added_applicants, removed_applicants);
 257             });
 258         });
 259     });
 260
 261     CFReleaseNull(old_applicants);
 262     CFReleaseNull(new_applicants);
 263
 264     CFReleaseNull(old_members);
 265     CFReleaseNull(new_members);
 266 }
 267
 268 CF_RETURNS_RETAINED
 269 CFDictionaryRef SOSAccountHandleRetirementMessages(SOSAccount* account, CFDictionaryRef circle_retirement_messages, CFErrorRef *error) {
 270     SOSAccountTrustClassic* trust = account.trust;
 271     CFStringRef circle_name = SOSCircleGetName(trust.trustedCircle);
 272     CFMutableArrayRef handledRetirementIDs = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
 273     // We only handle one circle, look it up:
 274
 275     if(!trust.trustedCircle) // We don't fail, we intentionally handle nothing.
 276         return CFDictionaryCreateForCFTypes(kCFAllocatorDefault, NULL);
 277
 278     CFDictionaryRef retirement_dictionary = asDictionary(CFDictionaryGetValue(circle_retirement_messages, circle_name), error);
 279     if(!retirement_dictionary)
 280         return CFDictionaryCreateForCFTypes(kCFAllocatorDefault, NULL);
 281
 282     CFDictionaryForEach(retirement_dictionary, ^(const void *key, const void *value) {
 283         if(isData(value)) {
 284             SOSPeerInfoRef pi = SOSPeerInfoCreateFromData(NULL, error, (CFDataRef) value);
 285             if(pi && CFEqual(key, SOSPeerInfoGetPeerID(pi)) && SOSPeerInfoInspectRetirementTicket(pi, error)) {
 286                 [trust.retirees addObject: (__bridge id _Nonnull)(pi)];
 287
 288                 account.circle_rings_retirements_need_attention = true; // Have to handle retirements.
 289
 290                 CFArrayAppendValue(handledRetirementIDs, key);
 291             }
 292             CFReleaseNull(pi);
 293         }
 294     });
 295
 296     // If we are in the retiree list, we somehow got resurrected
 297     // clearly we took care of proper departure before so leave
 298     // and delcare that we withdrew this time.
 299     SOSPeerInfoRef me = account.peerInfo;
 300
 301     if (me && [trust.retirees containsObject:(__bridge id _Nonnull)(me)]) {
 302         SOSAccountPurgeIdentity(account);
 303         trust.departureCode = kSOSDiscoveredRetirement;
 304     }
 305
 306     CFDictionaryRef result = (CFArrayGetCount(handledRetirementIDs) == 0) ? CFDictionaryCreateForCFTypes(kCFAllocatorDefault, NULL)
 307                                                                           : CFDictionaryCreateForCFTypes(kCFAllocatorDefault, circle_name, handledRetirementIDs, NULL);
 308
 309     CFReleaseNull(handledRetirementIDs);
 310     return result;
 311 }
 312
 313 static SOSCircleRef SOSAccountCreateCircleFrom(CFStringRef circleName, CFTypeRef value, CFErrorRef *error) {
 314     if (value && !isData(value) && !isNull(value)) {
 315         secnotice("circleCreat", "Value provided not appropriate for a circle");
 316         CFStringRef description = CFCopyTypeIDDescription(CFGetTypeID(value));
 317         SOSCreateErrorWithFormat(kSOSErrorUnexpectedType, NULL, error, NULL,
 318                                  CFSTR("Expected data or NULL got %@"), description);
 319         CFReleaseSafe(description);
 320         return NULL;
 321     }
 322
 323     SOSCircleRef circle = NULL;
 324     if (!value || isNull(value)) {
 325         secnotice("circleCreat", "No circle found in data: %@", value);
 326         circle = NULL;
 327     } else {
 328         circle = SOSCircleCreateFromData(NULL, (CFDataRef) value, error);
 329         if (circle) {
 330             CFStringRef name = SOSCircleGetName(circle);
 331             if (!CFEqualSafe(name, circleName)) {
 332                 secnotice("circleCreat", "Expected circle named %@, got %@", circleName, name);
 333                 SOSCreateErrorWithFormat(kSOSErrorNameMismatch, NULL, error, NULL,
 334                                          CFSTR("Expected circle named %@, got %@"), circleName, name);
 335                 CFReleaseNull(circle);
 336             }
 337         } else {
 338             secnotice("circleCreat", "SOSCircleCreateFromData returned NULL.");
 339         }
 340     }
 341     return circle;
 342 }
 343
 344 bool SOSAccountHandleCircleMessage(SOSAccount* account,
 345                                    CFStringRef circleName, CFDataRef encodedCircleMessage, CFErrorRef *error) {
 346     bool success = false;
 347     CFErrorRef localError = NULL;
 348     SOSCircleRef circle = SOSAccountCreateCircleFrom(circleName, encodedCircleMessage, &localError);
 349     if (circle) {
 350         success = [account.trust updateCircleFromRemote:account.circle_transport newCircle:circle err:&localError];
 351         CFReleaseSafe(circle);
 352     } else {
 353         secerror("NULL circle found, ignoring ...");
 354         success = true;  // don't pend this NULL thing.
 355     }
 356
 357     if (!success) {
 358         if (isSOSErrorCoded(localError, kSOSErrorIncompatibleCircle)) {
 359             secerror("Incompatible circle found, abandoning membership: %@", circleName);
 360         }
 361
 362         if (error) {
 363             *error = localError;
 364             localError = NULL;
 365         }
 366
 367     }
 368
 369     CFReleaseNull(localError);
 370
 371     return success;
 372 }
 373
 374 bool SOSAccountHandleParametersChange(SOSAccount* account, CFDataRef parameters, CFErrorRef *error){
 375
 376     SecKeyRef newKey = NULL;
 377     CFDataRef newParameters = NULL;
 378     bool success = false;
 379
 380     if(SOSAccountRetrieveCloudParameters(account, &newKey, parameters, &newParameters, error)) {
 381         debugDumpUserParameters(CFSTR("SOSAccountHandleParametersChange got new user key parameters:"), parameters);
 382         secnotice("keygen", "SOSAccountHandleParametersChange got new public key: %@", newKey);
 383
 384         if (CFEqualSafe(account.accountKey, newKey)) {
 385             secnotice("updates", "Got same public key sent our way. Ignoring.");
 386             success = true;
 387         } else if (CFEqualSafe(account.previousAccountKey, newKey)) {
 388             secnotice("updates", "Got previous public key repeated. Ignoring.");
 389             success = true;
 390         } else {
 391             SOSAccountSetUnTrustedUserPublicKey(account, newKey);
 392             SOSAccountSetParameters(account, newParameters);
 393             newKey = NULL;
 394
 395             if(SOSAccountRetryUserCredentials(account)) {
 396                 secnotice("keygen", "Successfully used cached password with new parameters");
 397                 SOSAccountGenerationSignatureUpdate(account, error);
 398             } else {
 399                 secnotice("keygen", "Got new parameters for public key - could not find or use cached password");
 400                 SOSAccountPurgePrivateCredential(account);
 401             }
 402
 403             account.circle_rings_retirements_need_attention = true;
 404             account.key_interests_need_updating = true;
 405
 406             success = true;
 407         }
 408     }
 409
 410     CFReleaseNull(newKey);
 411     CFReleaseNull(newParameters);
 412
 413     return success;
 414 }
 415