keychain/ckks/CKKS.h

   1 /*
   2 * Copyright (c) 2016 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 #ifndef CKKS_h
  25 #define CKKS_h
  26
  27 #include <dispatch/dispatch.h>
  28 #include <ipc/securityd_client.h>
  29 #include <utilities/SecCFWrappers.h>
  30 #include <utilities/SecDb.h>
  31 #include <xpc/xpc.h>
  32
  33 #ifdef __OBJC__
  34 #import <Foundation/Foundation.h>
  35 NS_ASSUME_NONNULL_BEGIN
  36 #else
  37 CF_ASSUME_NONNULL_BEGIN
  38 #endif
  39
  40 #ifdef __OBJC__
  41
  42 typedef NS_ENUM(NSUInteger, SecCKKSItemEncryptionVersion) {
  43     CKKSItemEncryptionVersionNone = 0,  // No encryption present
  44     CKKSItemEncryptionVersion1 = 1,     // Current version, AES-SIV 512, not all fields authenticated
  45     CKKSItemEncryptionVersion2 = 2,     // Seed3 version, AES-SIV 512, all fields (including unknown fields) authenticated
  46 };
  47
  48 extern const SecCKKSItemEncryptionVersion currentCKKSItemEncryptionVersion;
  49
  50 /* Queue Actions */
  51 extern NSString* const SecCKKSActionAdd;
  52 extern NSString* const SecCKKSActionDelete;
  53 extern NSString* const SecCKKSActionModify;
  54
  55 /* Queue States */
  56 @protocol SecCKKSItemState <NSObject>
  57 @end
  58 typedef NSString<SecCKKSItemState> CKKSItemState;
  59 extern CKKSItemState* const SecCKKSStateNew;
  60 extern CKKSItemState* const SecCKKSStateUnauthenticated;
  61 extern CKKSItemState* const SecCKKSStateInFlight;
  62 extern CKKSItemState* const SecCKKSStateReencrypt;
  63 extern CKKSItemState* const SecCKKSStateError;
  64 extern CKKSItemState* const SecCKKSStateZoneMismatch; // an item has appeared that's in the wrong zone
  65 extern CKKSItemState* const SecCKKSStateDeleted;  // meta-state: please delete this item!
  66
  67 /* Processed States */
  68 @protocol SecCKKSProcessedState <NSObject>
  69 @end
  70 typedef NSString<SecCKKSProcessedState> CKKSProcessedState;
  71 extern CKKSProcessedState* const SecCKKSProcessedStateLocal;
  72 extern CKKSProcessedState* const SecCKKSProcessedStateRemote;
  73
  74 /* Key Classes */
  75 @protocol SecCKKSKeyClass <NSObject>
  76 @end
  77 typedef NSString<SecCKKSKeyClass> CKKSKeyClass;
  78 extern CKKSKeyClass* const SecCKKSKeyClassTLK;
  79 extern CKKSKeyClass* const SecCKKSKeyClassA;
  80 extern CKKSKeyClass* const SecCKKSKeyClassC;
  81
  82 /* Useful CloudKit configuration */
  83 extern NSString* SecCKKSContainerName;
  84 extern bool SecCKKSContainerUsePCS;
  85 extern NSString* const SecCKKSSubscriptionID;
  86 extern NSString* const SecCKKSAPSNamedPort;
  87
  88 /* Item CKRecords */
  89 extern NSString* const SecCKRecordItemType;
  90 extern NSString* const SecCKRecordHostOSVersionKey;
  91 extern NSString* const SecCKRecordEncryptionVersionKey;
  92 extern NSString* const SecCKRecordParentKeyRefKey;
  93 extern NSString* const SecCKRecordDataKey;
  94 extern NSString* const SecCKRecordWrappedKeyKey;
  95 extern NSString* const SecCKRecordGenerationCountKey;
  96 extern NSString* const SecCKRecordPCSServiceIdentifier;
  97 extern NSString* const SecCKRecordPCSPublicKey;
  98 extern NSString* const SecCKRecordPCSPublicIdentity;
  99 extern NSString* const SecCKRecordServerWasCurrent;
 100
 101 /* Intermediate Key CKRecord Keys */
 102 extern NSString* const SecCKRecordIntermediateKeyType;
 103 extern NSString* const SecCKRecordKeyClassKey;
 104 //extern NSString*  const SecCKRecordWrappedKeyKey;
 105 //extern NSString*  const SecCKRecordParentKeyRefKey;
 106
 107 /* TLK Share CKRecord Keys */
 108 // These are a bit special; they can't use the record ID as information without parsing.
 109 extern NSString* const SecCKRecordTLKShareType;
 110 extern NSString* const SecCKRecordSenderPeerID;
 111 extern NSString* const SecCKRecordReceiverPeerID;
 112 extern NSString* const SecCKRecordReceiverPublicEncryptionKey;
 113 extern NSString* const SecCKRecordCurve;
 114 extern NSString* const SecCKRecordEpoch;
 115 extern NSString* const SecCKRecordPoisoned;
 116 extern NSString* const SecCKRecordSignature;
 117 extern NSString* const SecCKRecordVersion;
 118 //extern NSString*  const SecCKRecordParentKeyRefKey; // reference to the key contained by this record
 119 //extern NSString*  const SecCKRecordWrappedKeyKey;   // key material
 120
 121 /* Current Key CKRecord Keys */
 122 extern NSString* const SecCKRecordCurrentKeyType;
 123 // The key class will be the record name.
 124 //extern NSString*  const SecCKRecordParentKeyRefKey; <-- represent the current key for this key class
 125
 126 /* Current Item CKRecord Keys */
 127 extern NSString* const SecCKRecordCurrentItemType;
 128 extern NSString* const SecCKRecordItemRefKey;
 129
 130
 131 /* Device State CKRecord Keys */
 132 extern NSString* const SecCKRecordDeviceStateType;
 133 extern NSString* const SecCKRecordCirclePeerID;
 134 extern NSString* const SecCKRecordCircleStatus;
 135 extern NSString* const SecCKRecordKeyState;
 136 extern NSString* const SecCKRecordCurrentTLK;
 137 extern NSString* const SecCKRecordCurrentClassA;
 138 extern NSString* const SecCKRecordCurrentClassC;
 139 extern NSString* const SecCKSRecordLastUnlockTime;
 140 extern NSString* const SecCKSRecordOSVersionKey; // Similar to SecCKRecordHostOSVersionKey, but better named
 141
 142 /* Manifest master CKRecord Keys */
 143 extern NSString* const SecCKRecordManifestType;
 144 extern NSString* const SecCKRecordManifestDigestValueKey;
 145 extern NSString* const SecCKRecordManifestGenerationCountKey;
 146 extern NSString* const SecCKRecordManifestLeafRecordIDsKey;
 147 extern NSString* const SecCKRecordManifestPeerManifestRecordIDsKey;
 148 extern NSString* const SecCKRecordManifestCurrentItemsKey;
 149 extern NSString* const SecCKRecordManifestSignaturesKey;
 150 extern NSString* const SecCKRecordManifestSignerIDKey;
 151 extern NSString* const SecCKRecordManifestSchemaKey;
 152
 153 /* Manifest leaf CKRecord Keys */
 154 extern NSString* const SecCKRecordManifestLeafType;
 155 extern NSString* const SecCKRecordManifestLeafDERKey;
 156 extern NSString* const SecCKRecordManifestLeafDigestKey;
 157
 158 /* Zone Key Hierarchy States */
 159 @protocol SecCKKSZoneKeyState <NSObject>
 160 @end
 161 typedef NSString<SecCKKSZoneKeyState> CKKSZoneKeyState;
 162
 163 // CKKS is currently logged out
 164 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateLoggedOut;
 165
 166 // Class has just been created.
 167 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateInitializing;
 168 // CKKSZone has just informed us that its setup is done (and completed successfully).
 169 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateInitialized;
 170 // CKKSZone has informed us that zone setup did not work. Try again soon!
 171 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateZoneCreationFailed;
 172 // Everything is ready and waiting for input.
 173 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateReady;
 174 // We're presumably ready, but we'd like to do one or two more checks after we unlock.
 175 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateReadyPendingUnlock;
 176
 177 // We're currently refetching the zone
 178 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateFetch;
 179 // A Fetch has just been completed which includes some new keys to process
 180 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateFetchComplete;
 181 // We'd really like a full refetch.
 182 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateNeedFullRefetch;
 183 // We've received a wrapped TLK, but we don't have its contents yet. Wait until they arrive.
 184 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateWaitForTLK;
 185 // We've received a wrapped TLK, but we can't process it until the keybag unlocks. Wait until then.
 186 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateWaitForUnlock;
 187 // Things are unhealthy, but we're not sure entirely why.
 188 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateUnhealthy;
 189 // Something has gone horribly wrong with the current key pointers.
 190 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateBadCurrentPointers;
 191 // Something has gone wrong creating new TLKs.
 192 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateNewTLKsFailed;
 193 // Something isn't quite right with the TLK shares.
 194 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateHealTLKShares;
 195 // Something has gone wrong fixing TLK shares.
 196 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateHealTLKSharesFailed;
 197 // The key hierarchy state machine needs to wait for the fixup operation to complete
 198 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateWaitForFixupOperation;
 199 // The key hierarchy state machine is responding to a key state reprocess request
 200 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateProcess;
 201
 202 // CKKS is resetting the remote zone, due to key hierarchy reasons. Will not proceed until the local reset occurs.
 203 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateResettingZone;
 204 // CKKS is resetting the local data, likely to do a cloudkit reset or a rpc.
 205 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateResettingLocalData;
 206
 207 // Fatal error. Will not proceed unless fixed from outside class.
 208 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateError;
 209 // This CKKS instance has been cancelled.
 210 extern CKKSZoneKeyState* const SecCKKSZoneKeyStateCancelled;
 211
 212 // If you absolutely need to numberify one of the above constants, here's your maps.
 213 NSDictionary<CKKSZoneKeyState*, NSNumber*>* CKKSZoneKeyStateMap(void);
 214 NSDictionary<NSNumber*, CKKSZoneKeyState*>* CKKSZoneKeyStateInverseMap(void);
 215 NSNumber* CKKSZoneKeyToNumber(CKKSZoneKeyState* state);
 216 CKKSZoneKeyState* CKKSZoneKeyRecover(NSNumber* stateNumber);
 217
 218 // Use this to determine if CKKS believes the current state is "transient": that is, should resolve itself with further local processing
 219 // or 'nontransient': further local processing won't progress. Either we're ready, or waiting for the user to unlock, or a remote device to do something.
 220 bool CKKSKeyStateTransient(CKKSZoneKeyState* state);
 221
 222 /* Hide Item Length */
 223 extern const NSUInteger SecCKKSItemPaddingBlockSize;
 224
 225 /* Aggd Keys */
 226 extern NSString* const SecCKKSAggdPropagationDelay;
 227 extern NSString* const SecCKKSAggdPrimaryKeyConflict;
 228 extern NSString* const SecCKKSAggdViewKeyCount;
 229 extern NSString* const SecCKKSAggdItemReencryption;
 230
 231 extern NSString* const SecCKKSUserDefaultsSuite;
 232
 233 extern NSString* const CKKSErrorDomain;
 234 extern NSString* const CKKSServerExtensionErrorDomain;
 235
 236 /* Queue limits: these should likely be configurable via plist */
 237 #define SecCKKSOutgoingQueueItemsAtOnce 100
 238 #define SecCKKSIncomingQueueItemsAtOnce 50
 239
 240 // Utility functions
 241 NSString* SecCKKSHostOSVersion(void);
 242
 243 #endif  // OBJ-C
 244
 245 /* C functions to interact with CKKS */
 246 void SecCKKSInitialize(SecDbRef db);
 247 void SecCKKSNotifyBlock(SecDbConnectionRef dbconn, SecDbTransactionPhase phase, SecDbTransactionSource source, CFArrayRef changes);
 248
 249 // Called by XPC approximately every 3 days
 250 void SecCKKS24hrNotification(void);
 251
 252 // Register this callback to receive a call when the item with this UUID next successfully (or unsuccessfully) exits the outgoing queue.
 253 void CKKSRegisterSyncStatusCallback(CFStringRef cfuuid, SecBoolCFErrorCallback callback);
 254
 255 // Tells CKKS that the local keychain was reset, and that it should respond accordingly
 256 void SecCKKSPerformLocalResync(void);
 257
 258 // Returns true if CloudKit keychain syncing should occur
 259 bool SecCKKSIsEnabled(void);
 260
 261 bool SecCKKSEnable(void);
 262 bool SecCKKSDisable(void);
 263
 264 bool SecCKKSResetSyncing(void);
 265
 266 bool SecCKKSSyncManifests(void);
 267 bool SecCKKSEnableSyncManifests(void);
 268 bool SecCKKSSetSyncManifests(bool value);
 269
 270 bool SecCKKSEnforceManifests(void);
 271 bool SecCKKSEnableEnforceManifests(void);
 272 bool SecCKKSSetEnforceManifests(bool value);
 273
 274 bool SecCKKSReduceRateLimiting(void);
 275 bool SecCKKSSetReduceRateLimiting(bool value);
 276
 277 // Testing support
 278 bool SecCKKSTestsEnabled(void);
 279 bool SecCKKSTestsEnable(void);
 280 bool SecCKKSTestsDisable(void);
 281
 282 void SecCKKSTestResetFlags(void);
 283 bool SecCKKSTestDisableAutomaticUUID(void);
 284 void SecCKKSTestSetDisableAutomaticUUID(bool set);
 285
 286 bool SecCKKSTestDisableSOS(void);
 287 void SecCKKSTestSetDisableSOS(bool set);
 288
 289 bool SecCKKSTestDisableKeyNotifications(void);
 290 void SecCKKSTestSetDisableKeyNotifications(bool set);
 291
 292 // TODO: handle errors better
 293 typedef CF_ENUM(CFIndex, CKKSErrorCode) {
 294     CKKSNotInitialized = 9,
 295     CKKSNotLoggedIn = 10,
 296     CKKSNoSuchView = 11,
 297
 298     CKKSRemoteItemChangePending = 12,
 299     CKKSLocalItemChangePending = 13,
 300     CKKSItemChanged = 14,
 301     CKKSNoUUIDOnItem = 15,
 302     CKKSItemCreationFailure = 16,
 303     CKKSInvalidKeyClass = 17,
 304     CKKSKeyNotSelfWrapped = 18,
 305     CKKSNoTrustedPeer = 19,
 306     CKKSDataMismatch = 20,
 307     CKKSProtobufFailure = 21,
 308     CKKSNoSuchRecord = 22,
 309     CKKSMissingTLKShare = 23,
 310     CKKSNoPeersAvailable = 24,
 311
 312     CKKSSplitKeyHierarchy = 32,
 313     CKKSOrphanedKey = 33,
 314     CKKSInvalidTLK = 34,
 315     CKKSNoTrustedTLKShares = 35,
 316     CKKSKeyUnknownFormat = 36,
 317     CKKSNoSigningKey = 37,
 318     CKKSNoEncryptionKey = 38,
 319
 320     CKKSNotHSA2 = 40,
 321     CKKSiCloudGreyMode = 41,
 322
 323     CKKSNoFetchesRequested = 50,
 324 };
 325
 326 typedef CF_ENUM(CFIndex, CKKSResultDescriptionErrorCode) {
 327     CKKSResultDescriptionNone = 0,
 328     CKKSResultDescriptionPendingKeyReady = 1,
 329     CKKSResultDescriptionPendingSuccessfulFetch = 2,
 330     CKKSResultDescriptionPendingAccountLoggedIn = 3,
 331     CKKSResultDescriptionPendingUnlock = 4,
 332     CKKSResultDescriptionPendingBottledPeerModifyRecords = 5,
 333     CKKSResultDescriptionPendingBottledPeerFetchRecords = 6,
 334
 335     CKKSResultDescriptionPendingZoneChangeFetchScheduling = 1000,
 336     CKKSResultDescriptionPendingViewChangedScheduling = 1001,
 337     CKKSResultDescriptionPendingZoneInitializeScheduling = 1002,
 338     CKKSResultDescriptionPendingOutgoingQueueScheduling = 1003,
 339     CKKSResultDescriptionPendingKeyHierachyPokeScheduling = 1004,
 340 };
 341
 342 // These errors are returned by the CKKS server extension.
 343 // Commented out codes here indicate that we don't currently handle them on the client side.
 344 typedef CF_ENUM(CFIndex, CKKSServerExtensionErrorCode) {
 345     // Generic Errors
 346     //CKKSServerMissingField = 1,
 347     //CKKSServerMissingRecord = 2,
 348     //CKKSServerUnexpectedFieldType = 3,
 349     //CKKSServerUnexpectedRecordType = 4,
 350     //CKKSServerUnepxectedRecordID = 5,
 351
 352     // Chain errors:
 353     //CKKSServerMissingCurrentKeyPointer = 6,
 354     //CKKSServerMissingCurrentKey = 7,
 355     //CKKSServerUnexpectedSyncKeyClassInChain = 8,
 356     CKKSServerUnexpectedSyncKeyInChain = 9,
 357
 358     // Item/Currentitem record errors:
 359     //CKKSServerKeyrollingNotAllowed = 10,
 360     //CKKSServerInvalidPublicIdentity = 11,
 361     //CKKSServerPublicKeyMismatch = 12,
 362     //CKKSServerServiceNumberMismatch = 13,
 363     //CKKSServerUnknownServiceNumber = 14,
 364     //CKKSServerEncverLessThanMinVal = 15,
 365     //CKKSServerCannotModifyWasCurrent = 16,
 366     //CKKSServerInvalidCurrentItem = 17,
 367 };
 368
 369 #define SecTranslateError(nserrorptr, cferror)             \
 370     if(nserrorptr) {                                       \
 371         *nserrorptr = (__bridge_transfer NSError*)cferror; \
 372     } else {                                               \
 373         CFReleaseNull(cferror);                            \
 374     }
 375
 376 // Very similar to the secerror, secnotice, and secinfo macros in debugging.h, but add zoneNames
 377 #define ckkserrorwithzonename(scope, zoneName, format, ...)                                                             \
 378     {                                                                                                                   \
 379         os_log(secLogObjForScope("SecError"), scope "-%@: " format, (zoneName ? zoneName : @"unknown"), ##__VA_ARGS__); \
 380     }
 381 #define ckksnoticewithzonename(scope, zoneName, format, ...)                                                                         \
 382     {                                                                                                                                \
 383         os_log(secLogObjForCFScope((__bridge CFStringRef)[@(scope "-") stringByAppendingString:(zoneName ? zoneName : @"unknown")]), \
 384                format,                                                                                                               \
 385                ##__VA_ARGS__);                                                                                                       \
 386     }
 387 #define ckksinfowithzonename(scope, zoneName, format, ...)                                                                                 \
 388     {                                                                                                                                      \
 389         os_log_debug(secLogObjForCFScope((__bridge CFStringRef)[@(scope "-") stringByAppendingString:(zoneName ? zoneName : @"unknown")]), \
 390                      format,                                                                                                               \
 391                      ##__VA_ARGS__);                                                                                                       \
 392     }
 393
 394 #define ckkserror(scope, zoneNameHaver, format, ...)             \
 395     {                                                            \
 396         NSString* znh = zoneNameHaver.zoneName;                  \
 397         ckkserrorwithzonename(scope, znh, format, ##__VA_ARGS__) \
 398     }
 399 #define ckksnotice(scope, zoneNameHaver, format, ...)             \
 400     {                                                             \
 401         NSString* znh = zoneNameHaver.zoneName;                   \
 402         ckksnoticewithzonename(scope, znh, format, ##__VA_ARGS__) \
 403     }
 404 #define ckksinfo(scope, zoneNameHaver, format, ...)             \
 405     {                                                           \
 406         NSString* znh = zoneNameHaver.zoneName;                 \
 407         ckksinfowithzonename(scope, znh, format, ##__VA_ARGS__) \
 408     }
 409
 410 #undef ckksdebug
 411 #if !defined(NDEBUG)
 412 #define ckksdebugwithzonename(scope, zoneName, format, ...)                                                                                \
 413     {                                                                                                                                      \
 414         os_log_debug(secLogObjForCFScope((__bridge CFStringRef)[@(scope "-") stringByAppendingString:(zoneName ? zoneName : @"unknown")]), \
 415                      format,                                                                                                               \
 416                      ##__VA_ARGS__);                                                                                                       \
 417     }
 418 #define ckksdebug(scope, zoneNameHaver, format, ...)             \
 419     {                                                            \
 420         NSString* znh = zoneNameHaver.zoneName;                  \
 421         ckksdebugwithzonename(scope, znh, format, ##__VA_ARGS__) \
 422     }
 423 #else
 424 #define ckksdebug(scope, ...) /* nothing */
 425 #endif
 426
 427 #ifdef __OBJC__
 428 NS_ASSUME_NONNULL_END
 429 #else
 430 CF_ASSUME_NONNULL_END
 431 #endif
 432
 433 #endif /* CKKS_h */
 434