keychain/SecureObjectSync/SOSCircle.c

   1 /*
   2  * Copyright (c) 2012-2014 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  * SOSCircle.c -  Implementation of the secure object syncing transport
  27  */
  28
  29 #include <AssertMacros.h>
  30
  31 #include <CoreFoundation/CFArray.h>
  32 #include "keychain/SecureObjectSync/SOSTypes.h"
  33 #include "keychain/SecureObjectSync/SOSPeerInfo.h"
  34 #include "keychain/SecureObjectSync/SOSPeer.h"
  35 #include "keychain/SecureObjectSync/SOSCircle.h"
  36 #include "keychain/SecureObjectSync/SOSCloudCircle.h"
  37 #include "keychain/SecureObjectSync/SOSCloudCircleInternal.h"
  38 #include "keychain/SecureObjectSync/SOSInternal.h"
  39 #include "keychain/SecureObjectSync/SOSEnginePriv.h"
  40 #include "keychain/SecureObjectSync/SOSPeerInfoInternal.h"
  41 #include "keychain/SecureObjectSync/SOSGenCount.h"
  42 #include "keychain/SecureObjectSync/SOSPeerInfoCollections.h"
  43 #include <CoreFoundation/CoreFoundation.h>
  44 #include <Security/SecFramework.h>
  45
  46 #include <Security/SecKey.h>
  47 #include <Security/SecKeyPriv.h>
  48 #include <utilities/SecBuffer.h>
  49
  50 #include <utilities/SecCFWrappers.h>
  51 #include <utilities/SecCFError.h>
  52
  53 #include "keychain/SecureObjectSync/SOSCirclePriv.h"
  54
  55 //#include "ckdUtilities.h"
  56
  57 #include <corecrypto/ccder.h>
  58 #include <corecrypto/ccdigest.h>
  59 #include <corecrypto/ccsha2.h>
  60
  61 #include <stdlib.h>
  62 #include <assert.h>
  63
  64 CFGiblisWithCompareFor(SOSCircle);
  65
  66 SOSCircleRef SOSCircleCreate(CFAllocatorRef allocator, CFStringRef name, CFErrorRef *error) {
  67     SOSCircleRef c = CFTypeAllocate(SOSCircle, struct __OpaqueSOSCircle, allocator);
  68     assert(name);
  69
  70     c->name = CFStringCreateCopy(allocator, name);
  71     c->generation = SOSGenerationCreate();
  72     c->peers = CFSetCreateMutableForSOSPeerInfosByID(allocator);
  73     c->applicants = CFSetCreateMutableForSOSPeerInfosByID(allocator);
  74     c->rejected_applicants = CFSetCreateMutableForSOSPeerInfosByID(allocator);
  75     c->signatures = CFDictionaryCreateMutableForCFTypes(allocator);
  76     return c;
  77 }
  78
  79 static CFMutableSetRef CFSetOfPeerInfoDeepCopy(CFAllocatorRef allocator, CFSetRef peerInfoSet)
  80 {
  81    __block CFMutableSetRef result = CFSetCreateMutableForSOSPeerInfosByID(allocator);
  82     CFSetForEach(peerInfoSet, ^(const void *value) {
  83         SOSPeerInfoRef pi = (SOSPeerInfoRef) value;
  84         CFErrorRef localError = NULL;
  85         SOSPeerInfoRef copiedPeer = SOSPeerInfoCreateCopy(allocator, pi, &localError);
  86         if (copiedPeer) {
  87             CFSetAddValue(result, copiedPeer);
  88         } else {
  89             secerror("Failed to copy peer: %@ (%@)", pi, localError);
  90         }
  91         CFReleaseSafe(copiedPeer);
  92         CFReleaseSafe(localError);
  93     });
  94     return result;
  95 }
  96
  97 SOSCircleRef SOSCircleCopyCircle(CFAllocatorRef allocator, SOSCircleRef otherCircle, CFErrorRef *error)
  98 {
  99     SOSCircleRef c = CFTypeAllocate(SOSCircle, struct __OpaqueSOSCircle, allocator);
 100
 101     assert(otherCircle);
 102     c->name = CFStringCreateCopy(allocator, otherCircle->name);
 103     c->generation = SOSGenerationCopy(otherCircle->generation);
 104
 105     c->peers = CFSetOfPeerInfoDeepCopy(allocator, otherCircle->peers);
 106     c->applicants = CFSetOfPeerInfoDeepCopy(allocator, otherCircle->applicants);
 107     c->rejected_applicants = CFSetOfPeerInfoDeepCopy(allocator, otherCircle->rejected_applicants);
 108
 109     c->signatures = CFDictionaryCreateMutableCopy(allocator, 0, otherCircle->signatures);
 110
 111     return c;
 112 }
 113
 114 static Boolean SOSCircleCompare(CFTypeRef lhs, CFTypeRef rhs) {
 115     if (CFGetTypeID(lhs) != SOSCircleGetTypeID()
 116      || CFGetTypeID(rhs) != SOSCircleGetTypeID())
 117         return false;
 118
 119     SOSCircleRef left = SOSCircleConvertAndAssertStable(lhs);
 120     SOSCircleRef right = SOSCircleConvertAndAssertStable(rhs);
 121
 122     // TODO: we should be doing set equality for peers and applicants.
 123     return NULL != left && NULL != right
 124         && CFEqualSafe(left->generation, right->generation)
 125         && SOSPeerInfoSetContainsIdenticalPeers(left->peers, right->peers)
 126         && SOSPeerInfoSetContainsIdenticalPeers(left->applicants, right->applicants)
 127         && SOSPeerInfoSetContainsIdenticalPeers(left->rejected_applicants, right->rejected_applicants)
 128         && CFEqualSafe(left->signatures, right->signatures);
 129 }
 130
 131 static CFMutableArrayRef CFSetCopyValuesCFArray(CFSetRef set)
 132 {
 133     CFIndex count = CFSetGetCount(set);
 134
 135     CFMutableArrayRef result = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
 136     if (count > 0) {
 137         const void * values[count];
 138         CFSetGetValues(set, values);
 139         for (int current = 0; current < count; ++current) {
 140             CFArrayAppendValue(result, values[current]);
 141         }
 142     }
 143
 144     return result;
 145 }
 146
 147 static bool SOSCircleDigestArray(const struct ccdigest_info *di, CFMutableArrayRef array, void *hash_result, CFErrorRef *error)
 148 {
 149     __block bool success = true;
 150     ccdigest_di_decl(di, array_digest);
 151     void * a_digest = (void * )array_digest;
 152
 153     ccdigest_init(di, array_digest);
 154     CFArraySortValues(array, CFRangeMake(0, CFArrayGetCount(array)), SOSPeerInfoCompareByID, (void *)SOSPeerCmpPubKeyHash);
 155     CFArrayForEach(array, ^(const void *peer) {
 156         if (!SOSPeerInfoUpdateDigestWithPublicKeyBytes((SOSPeerInfoRef)peer, di, a_digest, error))
 157             success = false;
 158     });
 159     ccdigest_final(di, array_digest, hash_result);
 160
 161     return success;
 162 }
 163
 164 static bool SOSCircleDigestSet(const struct ccdigest_info *di, CFMutableSetRef set, void *hash_result, CFErrorRef *error)
 165 {
 166     CFMutableArrayRef values = CFSetCopyValuesCFArray(set);
 167
 168     bool result = SOSCircleDigestArray(di, values, hash_result, error);
 169
 170     CFReleaseSafe(values);
 171
 172     return result;
 173 }
 174
 175 static bool SOSCircleHashGenAndPeers(const struct ccdigest_info *di, SOSGenCountRef gen, CFMutableSetRef peers, void*hash_result, CFErrorRef *error) {
 176     ccdigest_di_decl(di, circle_digest);
 177     ccdigest_init(di, circle_digest);
 178     int64_t generation = SOSGetGenerationSint(gen);
 179     ccdigest_update(di, circle_digest, sizeof(generation), &generation);
 180
 181     SOSCircleDigestSet(di, peers, hash_result, error);
 182     ccdigest_update(di, circle_digest, di->output_size, hash_result);
 183     ccdigest_final(di, circle_digest, hash_result);
 184     return true;
 185 }
 186
 187 static bool SOSCircleHash(const struct ccdigest_info *di, SOSCircleRef circle, void *hash_result, CFErrorRef *error) {
 188     return SOSCircleHashGenAndPeers(di, SOSCircleGetGeneration(circle), circle->peers, hash_result, error);
 189 }
 190
 191 static bool SOSCircleHashNextGenWithAdditionalPeer(const struct ccdigest_info *di, SOSCircleRef circle, SOSPeerInfoRef additionalPeer, void *hash_result, CFErrorRef *error) {
 192     bool result = false;
 193     CFMutableSetRef peers = CFSetCreateMutableCopy(NULL, 0, circle->peers);
 194     CFSetAddValue(peers, additionalPeer);
 195
 196     SOSGenCountRef nextGen = SOSGenerationIncrementAndCreate(circle->generation);
 197
 198     result = SOSCircleHashGenAndPeers(di, nextGen, peers, hash_result, error);
 199
 200     CFReleaseNull(nextGen);
 201     CFReleaseNull(peers);
 202
 203     return result;
 204 }
 205
 206 bool SOSCircleSetSignature(SOSCircleRef circle, SecKeyRef pubkey, CFDataRef signature, CFErrorRef *error) {
 207     bool result = false;
 208
 209     CFStringRef pubKeyID = SOSCopyIDOfKey(pubkey, error);
 210     require_quiet(pubKeyID, fail);
 211     CFDictionarySetValue(circle->signatures, pubKeyID, signature);
 212     result = true;
 213
 214 fail:
 215     CFReleaseSafe(pubKeyID);
 216     return result;
 217 }
 218
 219 static bool SOSCircleRemoveSignatures(SOSCircleRef circle, CFErrorRef *error) {
 220     CFDictionaryRemoveAllValues(circle->signatures);
 221     return true;
 222 }
 223
 224 CFDataRef SOSCircleGetSignature(SOSCircleRef circle, SecKeyRef pubkey, CFErrorRef *error) {
 225     CFStringRef pubKeyID = SOSCopyIDOfKey(pubkey, error);
 226     CFDataRef result = NULL;
 227     require_quiet(pubKeyID, fail);
 228
 229     CFTypeRef value = (CFDataRef)CFDictionaryGetValue(circle->signatures, pubKeyID);
 230
 231     if (isData(value)) result = (CFDataRef) value;
 232
 233 fail:
 234     CFReleaseSafe(pubKeyID);
 235     return result;
 236 }
 237
 238 CFDictionaryRef SOSCircleCopyAllSignatures(SOSCircleRef circle) {
 239     return CFDictionaryCreateCopy(kCFAllocatorDefault, circle->signatures);
 240 }
 241
 242 #define circle_signature_di() ccsha256_di()
 243
 244 static CFDataRef SecKeyCopyRawHashSignature(const struct ccdigest_info *di, const uint8_t* hashToSign, SecKeyRef privKey, CFErrorRef *error) {
 245     CFDataRef result = NULL;
 246
 247     CFMutableDataRef signature = CFDataCreateMutableWithScratch(kCFAllocatorDefault, SecKeyGetSize(privKey, kSecKeySignatureSize));
 248     size_t signatureSpace = CFDataGetLength(signature);
 249
 250     OSStatus status = SecKeyRawSign(privKey, kSecPaddingNone, hashToSign, di->output_size, CFDataGetMutableBytePtr(signature), &signatureSpace);
 251     require_quiet(SecError(status, error, CFSTR("Signing failed: %d"), (int)status), fail);
 252
 253     if (signatureSpace < (size_t)CFDataGetLength(signature)) {
 254         CFDataSetLength(signature, signatureSpace);
 255     }
 256
 257     CFTransferRetained(result, signature);
 258 fail:
 259     CFReleaseNull(signature);
 260     return result;
 261 }
 262
 263 bool SOSCircleSign(SOSCircleRef circle, SecKeyRef privKey, CFErrorRef *error) {
 264     const struct ccdigest_info *di = circle_signature_di();
 265
 266     __block CFDataRef signature = NULL;
 267     bool didSign = false;
 268     require_quiet(privKey, fail);
 269
 270     PerformWithBuffer(di->output_size, ^(size_t size, uint8_t *hash_result) {
 271         if (SOSCircleHash(di, circle, hash_result, error)) {
 272             signature = SecKeyCopyRawHashSignature(di, hash_result, privKey, error);
 273         }
 274     });
 275     require_quiet(signature, fail);
 276     require_quiet(SOSCircleSetSignature(circle, privKey, signature, error), fail);
 277
 278     didSign = true;
 279
 280 fail:
 281     CFReleaseNull(signature);
 282     return didSign;
 283 }
 284
 285 CFDataRef SOSCircleCopyNextGenSignatureWithPeerAdded(SOSCircleRef circle, SOSPeerInfoRef peer, SecKeyRef privKey, CFErrorRef *error) {
 286     const struct ccdigest_info *di = circle_signature_di();
 287
 288     __block CFDataRef signature = NULL;
 289     require_quiet(privKey, fail);
 290
 291     PerformWithBuffer(di->output_size, ^(size_t size, uint8_t *hash_result) {
 292         if (SOSCircleHashNextGenWithAdditionalPeer(di, circle, peer, hash_result, error)) {
 293             signature = SecKeyCopyRawHashSignature(di, hash_result, privKey, error);
 294         }
 295     });
 296
 297 fail:
 298     return signature;
 299 }
 300
 301
 302 static bool SOSCircleConcordanceRingSign(SOSCircleRef circle, SecKeyRef privKey, CFErrorRef *error) {
 303     secnotice("Development", "SOSCircleEnsureRingConsistency requires ring signing op", NULL);
 304     return true;
 305 }
 306
 307
 308 bool SOSCircleVerifySignatureExists(SOSCircleRef circle, SecKeyRef pubKey, CFErrorRef *error) {
 309     if(!pubKey) {
 310         secerror("SOSCircleVerifySignatureExists no pubKey");
 311         SOSCreateError(kSOSErrorBadFormat, CFSTR("SOSCircleVerifySignatureExists no pubKey"), (error != NULL) ? *error : NULL, error);
 312         return false;
 313     }
 314     CFDataRef signature = SOSCircleGetSignature(circle, pubKey, error);
 315     return NULL != signature;
 316 }
 317
 318 CFStringRef SOSCircleCopyHashString(SOSCircleRef circle) {
 319     const struct ccdigest_info *di = ccsha256_di();
 320     uint8_t hash_result[di->output_size];
 321     SOSCircleHash(di, circle, hash_result, NULL);
 322     return SOSCopyHashBufAsString(hash_result, sizeof(hash_result));
 323 }
 324
 325 bool SOSCircleVerify(SOSCircleRef circle, SecKeyRef pubKey, CFErrorRef *error) {
 326     const struct ccdigest_info *di = ccsha256_di();
 327     uint8_t hash_result[di->output_size];
 328
 329     SOSCircleHash(di, circle, hash_result, error);
 330
 331     CFDataRef signature = SOSCircleGetSignature(circle, pubKey, error);
 332     if(!signature) return false;
 333
 334     return SecError(SecKeyRawVerify(pubKey, kSecPaddingNone, hash_result, di->output_size,
 335                                     CFDataGetBytePtr(signature), CFDataGetLength(signature)), error, CFSTR("Signature verification failed."));;
 336 }
 337
 338 bool SOSCircleVerifyPeerSignatureExists(SOSCircleRef circle, SOSPeerInfoRef peer) {
 339     bool result = false;
 340     SecKeyRef pub_key = SOSPeerInfoCopyPubKey(peer, NULL);
 341     require_quiet(pub_key, fail);
 342     result = SOSCircleVerifySignatureExists(circle, pub_key, NULL);
 343 fail:
 344     CFReleaseSafe(pub_key);
 345     return result;
 346 }
 347
 348 bool SOSCircleVerifyPeerSigned(SOSCircleRef circle, SOSPeerInfoRef peer, CFErrorRef *error) {
 349     bool result = false;
 350     SecKeyRef pub_key = SOSPeerInfoCopyPubKey(peer, error);
 351     require_quiet(pub_key, fail);
 352
 353     result = SOSCircleVerify(circle, pub_key, error);
 354 fail:
 355     CFReleaseSafe(pub_key);
 356     return result;
 357 }
 358
 359 static void CFSetRemoveAllPassing(CFMutableSetRef set, bool (^test)(const void *) ){
 360     CFMutableArrayRef toBeRemoved = CFArrayCreateMutable(kCFAllocatorDefault, 0, NULL);
 361
 362     CFSetForEach(set, ^(const void *value) {
 363         if (test(value))
 364             CFArrayAppendValue(toBeRemoved, value);
 365     });
 366
 367     CFArrayForEach(toBeRemoved, ^(const void *value) {
 368         CFSetRemoveValue(set, value);
 369     });
 370     CFReleaseNull(toBeRemoved);
 371 }
 372
 373 static void SOSCircleRejectNonValidApplicants(SOSCircleRef circle, SecKeyRef pubkey) {
 374     CFMutableSetRef applicants = SOSCircleCopyApplicants(circle, NULL);
 375     CFSetForEach(applicants, ^(const void *value) {
 376         SOSPeerInfoRef pi = (SOSPeerInfoRef) value;
 377         if(!SOSPeerInfoApplicationVerify(pi, pubkey, NULL)) {
 378             CFSetTransferObject(pi, circle->applicants, circle->rejected_applicants);
 379         }
 380     });
 381     CFReleaseNull(applicants);
 382 }
 383
 384 static SOSPeerInfoRef SOSCircleCopyPeerInfo(SOSCircleRef circle, CFStringRef peer_id, CFErrorRef *error) {
 385     __block SOSPeerInfoRef result = NULL;
 386
 387     CFSetForEach(circle->peers, ^(const void *value) {
 388         if (result == NULL) {
 389             SOSPeerInfoRef tpi = (SOSPeerInfoRef)value;
 390             if (CFEqual(SOSPeerInfoGetPeerID(tpi), peer_id))
 391                 result = tpi;
 392         }
 393     });
 394
 395     CFRetainSafe(result);
 396     return result;
 397 }
 398
 399 static bool SOSCircleUpgradePeerInfo(SOSCircleRef circle, SecKeyRef user_approver, SOSFullPeerInfoRef peerinfo) {
 400     bool retval = false;
 401     SecKeyRef userPubKey = SecKeyCreatePublicFromPrivate(user_approver);
 402     SOSPeerInfoRef fpi_pi = SOSFullPeerInfoGetPeerInfo(peerinfo);
 403     SOSPeerInfoRef pi = SOSCircleCopyPeerInfo(circle, SOSPeerInfoGetPeerID(fpi_pi), NULL);
 404     require_quiet(pi, out);
 405     require_quiet(SOSPeerInfoApplicationVerify(pi, userPubKey, NULL), re_sign);
 406     CFReleaseNull(userPubKey);
 407     CFReleaseNull(pi);
 408     return true;
 409
 410 re_sign:
 411     secnotice("circle", "SOSCircleGenerationSign: Upgraded peer's Application Signature");
 412     SecKeyRef device_key = SOSFullPeerInfoCopyDeviceKey(peerinfo, NULL);
 413     require_quiet(device_key, out);
 414     SOSPeerInfoRef new_pi = SOSPeerInfoCopyAsApplication(pi, user_approver, device_key, NULL);
 415     if(SOSCircleUpdatePeerInfo(circle, new_pi))
 416         retval = true;
 417     CFReleaseNull(new_pi);
 418     CFReleaseNull(device_key);
 419 out:
 420     CFReleaseNull(userPubKey);
 421     CFReleaseNull(pi);
 422     return retval;
 423 }
 424
 425 static bool SOSCircleEnsureRingConsistency(SOSCircleRef circle, CFErrorRef *error) {
 426     secnotice("Development", "SOSCircleEnsureRingConsistency requires ring membership and generation count consistency check", NULL);
 427     return true;
 428 }
 429
 430 bool SOSCircleSignOldStyleResetToOfferingCircle(SOSCircleRef circle, SOSFullPeerInfoRef peerinfo, SecKeyRef user_approver, CFErrorRef *error){
 431
 432     SecKeyRef ourKey = SOSFullPeerInfoCopyDeviceKey(peerinfo, error);
 433     SecKeyRef publicKey = NULL;
 434     require_quiet(ourKey, fail);
 435
 436     // Check if we're using an invalid peerinfo for this op.  There are cases where we might not be "upgraded".
 437     require_quiet(SOSCircleUpgradePeerInfo(circle, user_approver, peerinfo), fail);
 438     SOSCircleRemoveRetired(circle, error); // Prune off retirees since we're signing this one
 439     CFSetRemoveAllValues(circle->rejected_applicants); // Dump rejects so we clean them up sometime.
 440     publicKey = SecKeyCreatePublicFromPrivate(user_approver);
 441     SOSCircleRejectNonValidApplicants(circle, publicKey);
 442     require_quiet(SOSCircleEnsureRingConsistency(circle, error), fail);
 443     require_quiet(SOSCircleRemoveSignatures(circle, error), fail);
 444     require_quiet(SOSCircleSign(circle, user_approver, error), fail);
 445     require_quiet(SOSCircleSign(circle, ourKey, error), fail);
 446
 447     CFReleaseNull(ourKey);
 448     CFReleaseNull(publicKey);
 449     return true;
 450
 451 fail:
 452     CFReleaseNull(ourKey);
 453     CFReleaseNull(publicKey);
 454     return false;
 455 }
 456
 457 bool SOSCirclePreGenerationSign(SOSCircleRef circle, SecKeyRef userPubKey, CFErrorRef *error) {
 458     bool retval = false;
 459
 460     SOSCircleRemoveRetired(circle, error); // Prune off retirees since we're signing this one
 461     CFSetRemoveAllValues(circle->rejected_applicants); // Dump rejects so we clean them up sometime.
 462     SOSCircleRejectNonValidApplicants(circle, userPubKey);
 463
 464     require_quiet(SOSCircleRemoveSignatures(circle, error), errOut);
 465
 466     retval = true;
 467
 468 errOut:
 469     return retval;
 470
 471 }
 472
 473 static bool SOSCircleGenerationSign_Internal(SOSCircleRef circle, SecKeyRef userKey, SOSFullPeerInfoRef fpi, CFErrorRef *error) {
 474     // require_quiet(SOSCircleEnsureRingConsistency(circle, error), fail); Placeholder - this was never implemented
 475     bool retval = false;
 476     SecKeyRef ourKey = NULL;
 477     if (SOSCircleCountPeers(circle) != 0) {
 478         ourKey = SOSFullPeerInfoCopyDeviceKey(fpi, error);
 479         require_quiet(ourKey, errOut);
 480
 481         // Check if we're using an invalid peerinfo for this op.  There are cases where we might not be "upgraded".
 482         require_quiet(SOSCircleUpgradePeerInfo(circle, userKey, fpi), errOut);
 483
 484         require_quiet(SOSCircleSign(circle, userKey, error), errOut);
 485         require_quiet(SOSCircleSign(circle, ourKey, error), errOut);
 486         CFReleaseNull(ourKey);
 487     }
 488     retval = true;
 489
 490 errOut:
 491     CFReleaseNull(ourKey);
 492     return retval;
 493 }
 494
 495 bool SOSCircleGenerationSign(SOSCircleRef circle, SecKeyRef userKey, SOSFullPeerInfoRef fpi, CFErrorRef *error) {
 496     bool retval = false;
 497     SecKeyRef publicKey = NULL;
 498     publicKey = SecKeyCreatePublicFromPrivate(userKey);
 499
 500     require_quiet(SOSCirclePreGenerationSign(circle, publicKey, error), errOut);
 501     SOSCircleGenerationIncrement(circle);
 502     require_quiet(SOSCircleGenerationSign_Internal(circle, userKey, fpi, error), errOut);
 503     retval = true;
 504
 505 errOut:
 506     CFReleaseNull(publicKey);
 507     return retval;
 508 }
 509
 510
 511 static bool SOSCircleGenerationSignWithGenCount(SOSCircleRef circle, SecKeyRef userKey, SOSFullPeerInfoRef fpi, SOSGenCountRef gencount, CFErrorRef *error) {
 512     bool retval = false;
 513     SOSGenCountRef currentGen = SOSCircleGetGeneration(circle);
 514     require_action_quiet(SOSGenerationIsOlder(currentGen, gencount), errOut, SOSCreateError(kSOSErrorReplay, CFSTR("Generation Count for new circle is too old"), NULL, error));
 515     require_quiet(SOSCirclePreGenerationSign(circle, userKey, error), errOut);
 516     SOSCircleSetGeneration(circle, gencount);
 517     require_quiet(SOSCircleGenerationSign_Internal(circle, userKey, fpi, error), errOut);
 518     retval = true;
 519
 520 errOut:
 521     return retval;
 522 }
 523
 524
 525 bool SOSCircleConcordanceSign(SOSCircleRef circle, SOSFullPeerInfoRef peerinfo, CFErrorRef *error) {
 526     bool success = false;
 527     SecKeyRef ourKey = SOSFullPeerInfoCopyDeviceKey(peerinfo, error);
 528     require_quiet(ourKey, exit);
 529
 530     success = SOSCircleSign(circle, ourKey, error);
 531     SOSCircleConcordanceRingSign(circle, ourKey, error);
 532
 533 exit:
 534     CFReleaseNull(ourKey);
 535     return success;
 536 }
 537
 538 static inline SOSConcordanceStatus CheckPeerStatus(SOSCircleRef circle, SOSPeerInfoRef peer, SecKeyRef user_public_key, CFErrorRef *error) {
 539     SOSConcordanceStatus result = kSOSConcordanceNoPeer;
 540     SecKeyRef pubKey = SOSPeerInfoCopyPubKey(peer, error);
 541     require_quiet(pubKey, exit);
 542
 543     require_action_quiet(SOSCircleHasActiveValidPeer(circle, peer, user_public_key, error), exit, result = kSOSConcordanceNoPeer);
 544     require_action_quiet(SOSCircleVerifySignatureExists(circle, pubKey, error), exit, result = kSOSConcordanceNoPeerSig);
 545     require_action_quiet(SOSCircleVerify(circle, pubKey, error), exit, result = kSOSConcordanceBadPeerSig);
 546
 547     result = kSOSConcordanceTrusted;
 548
 549 exit:
 550     CFReleaseNull(pubKey);
 551     return result;
 552 }
 553
 554 static inline SOSConcordanceStatus CombineStatus(SOSConcordanceStatus status1, SOSConcordanceStatus status2)
 555 {
 556     if (status1 == kSOSConcordanceTrusted || status2 == kSOSConcordanceTrusted)
 557         return kSOSConcordanceTrusted;
 558
 559     if (status1 == kSOSConcordanceBadPeerSig || status2 == kSOSConcordanceBadPeerSig)
 560         return kSOSConcordanceBadPeerSig;
 561
 562     if (status1 == kSOSConcordanceNoPeerSig || status2 == kSOSConcordanceNoPeerSig)
 563         return kSOSConcordanceNoPeerSig;
 564
 565     return status1;
 566 }
 567
 568 static inline bool SOSCircleIsEmpty(SOSCircleRef circle) {
 569     return SOSCircleCountPeers(circle) == 0;
 570 }
 571
 572 static inline bool SOSCircleHasDegenerateGeneration(SOSCircleRef deGenCircle){
 573     CFIndex testPtr;
 574     CFNumberRef genCountTest = SOSCircleGetGeneration(deGenCircle);
 575     CFNumberGetValue(genCountTest, kCFNumberCFIndexType, &testPtr);
 576     return (testPtr== 0);
 577 }
 578
 579
 580 static inline bool SOSCircleIsDegenerateReset(SOSCircleRef deGenCircle){
 581     return SOSCircleHasDegenerateGeneration(deGenCircle) && SOSCircleIsEmpty(deGenCircle);
 582 }
 583
 584
 585 __unused static inline bool SOSCircleIsResignOffering(SOSCircleRef circle, SecKeyRef pubkey) {
 586     return SOSCircleCountActiveValidPeers(circle, pubkey) == 1;
 587 }
 588
 589 static inline SOSConcordanceStatus GetSignersStatus(SOSCircleRef signers_circle, SOSCircleRef status_circle,
 590                                                     SecKeyRef user_pubKey, SOSPeerInfoRef exclude, CFErrorRef *error) {
 591     CFStringRef excluded_id = exclude ? SOSPeerInfoGetPeerID(exclude) : NULL;
 592
 593     __block SOSConcordanceStatus status = kSOSConcordanceNoPeer;
 594     SOSCircleForEachActivePeer(signers_circle, ^(SOSPeerInfoRef peer) {
 595         SOSConcordanceStatus peerStatus = CheckPeerStatus(status_circle, peer, user_pubKey, error);
 596
 597         if (peerStatus == kSOSConcordanceNoPeerSig &&
 598             (CFEqualSafe(SOSPeerInfoGetPeerID(peer), excluded_id) || SOSPeerInfoIsCloudIdentity(peer)))
 599             peerStatus = kSOSConcordanceNoPeer;
 600
 601         status = CombineStatus(status, peerStatus); // TODO: Use multiple error gathering.
 602     });
 603
 604     return status;
 605 }
 606
 607 // Is current older than proposed?
 608 bool SOSCircleIsOlderGeneration(SOSCircleRef older, SOSCircleRef newer) {
 609     return SOSGenerationIsOlder(older->generation, newer->generation);
 610 }
 611
 612 static inline bool SOSCircleIsValidReset(SOSCircleRef current, SOSCircleRef proposed) {
 613     bool retval = false;
 614     retval = SOSCircleIsEmpty(proposed);
 615     require_quiet(retval, errOut);
 616     retval = SOSCircleIsOlderGeneration(current, proposed);
 617 errOut:
 618     return retval;
 619 }
 620
 621
 622 bool SOSCircleSharedTrustedPeers(SOSCircleRef current, SOSCircleRef proposed, SOSPeerInfoRef me) {
 623     __block bool retval = false;
 624     SOSCircleForEachPeer(current, ^(SOSPeerInfoRef peer) {
 625         if(!CFEqual(me, peer) && SOSCircleHasPeer(proposed, peer, NULL)) retval = true;
 626     });
 627     return retval;
 628 }
 629
 630 static SOSConcordanceStatus GetOfferingStatus(SOSCircleRef circle, SecKeyRef user_pubKey, CFErrorRef *error) {
 631     __block SOSConcordanceStatus status = kSOSConcordanceNoPeer;
 632     SOSCircleForEachPeer(circle, ^(SOSPeerInfoRef peer) {
 633         status = CheckPeerStatus(circle, peer, user_pubKey, error);
 634         if(status != kSOSConcordanceTrusted) status = kSOSConcordanceNoPeer;
 635     });
 636     return status;
 637 }
 638
 639
 640 SOSConcordanceStatus SOSCircleConcordanceTrust(SOSCircleRef known_circle, SOSCircleRef proposed_circle,
 641                                                SecKeyRef known_pubkey, SecKeyRef user_pubkey,
 642                                                SOSPeerInfoRef me, CFErrorRef *error) {
 643     if(user_pubkey == NULL) {
 644         SOSCreateError(kSOSErrorPublicKeyAbsent, CFSTR("Concordance with no user public key"), NULL, error);
 645         return kSOSConcordanceNoUserKey;
 646     }
 647
 648     if(SOSCircleIsDegenerateReset(proposed_circle)) {
 649         return kSOSConcordanceTrusted;
 650     }
 651
 652     if (SOSCircleIsValidReset(known_circle, proposed_circle)) {
 653         return kSOSConcordanceTrusted;
 654     }
 655
 656     if(!SOSCircleVerifySignatureExists(proposed_circle, user_pubkey, error)) {
 657         SOSCreateError(kSOSErrorBadSignature, CFSTR("No public signature to match current user key"), (error != NULL) ? *error : NULL, error);
 658         return kSOSConcordanceNoUserSig;
 659     }
 660
 661     if(!SOSCircleVerify(proposed_circle, user_pubkey, error)) {
 662         SOSCreateError(kSOSErrorBadSignature, CFSTR("Bad user public signature"), (error != NULL) ? *error : NULL, error);
 663         debugDumpCircle(CFSTR("proposed_circle"), proposed_circle);
 664         return kSOSConcordanceBadUserSig;
 665     }
 666
 667     if (SOSCircleIsEmpty(known_circle)) {
 668         return GetSignersStatus(proposed_circle, proposed_circle, user_pubkey, NULL, error);
 669     }
 670
 671     if(SOSCircleHasDegenerateGeneration(proposed_circle) && SOSCircleIsOffering(proposed_circle)){
 672         return GetSignersStatus(proposed_circle, proposed_circle, user_pubkey, NULL, error);
 673     }
 674
 675     if(SOSCircleIsOlderGeneration(proposed_circle, known_circle)) {
 676         SOSCreateError(kSOSErrorReplay, CFSTR("Bad generation - proposed circle gencount is older than known circle gencount"), NULL, error);
 677         debugDumpCircle(CFSTR("isOlderGeneration known_circle"), known_circle);
 678         debugDumpCircle(CFSTR("isOlderGeneration proposed_circle"), proposed_circle);
 679         return kSOSConcordanceGenOld;
 680     }
 681
 682     if(SOSCircleIsOffering(proposed_circle)){
 683         return GetOfferingStatus(proposed_circle, user_pubkey, error);
 684     }
 685
 686     return GetSignersStatus(known_circle, proposed_circle, user_pubkey, me, error);
 687 }
 688
 689
 690 static void SOSCircleDestroy(CFTypeRef aObj) {
 691     SOSCircleRef c = (SOSCircleRef) aObj;
 692
 693     CFReleaseNull(c->name);
 694     CFReleaseNull(c->generation);
 695     CFReleaseNull(c->peers);
 696     CFReleaseNull(c->applicants);
 697     CFReleaseNull(c->rejected_applicants);
 698     CFReleaseNull(c->signatures);
 699 }
 700
 701 static CFMutableStringRef defaultDescriptionCreate(CFTypeRef aObj){
 702     SOSCircleRef c = (SOSCircleRef) aObj;
 703     CFStringRef initPeerSep = CFSTR("\n");
 704     CFStringRef peerSep = CFSTR("\n");
 705
 706     CFMutableStringRef description = CFStringCreateMutable(kCFAllocatorDefault, 0);
 707
 708     SOSGenerationCountWithDescription(c->generation, ^(CFStringRef genDescription) {
 709         CFStringAppendFormat(description, NULL, CFSTR("<SOSCircle@%p: '%@' %@ P:["), c, c->name, genDescription);
 710     });
 711
 712     __block CFStringRef separator = initPeerSep;
 713     SOSCircleForEachActivePeer(c, ^(SOSPeerInfoRef peer) {
 714         CFStringRef sig = NULL;
 715         if (SOSCircleVerifyPeerSigned(c, peer, NULL)) {
 716             sig = CFSTR("√");
 717         } else {
 718             SecKeyRef pub_key = SOSPeerInfoCopyPubKey(peer, NULL);
 719             CFDataRef signature = pub_key ? SOSCircleGetSignature(c, pub_key, NULL) : NULL;
 720             sig = (signature == NULL) ? CFSTR("-") : CFSTR("?");
 721             CFReleaseNull(pub_key);
 722         }
 723
 724         CFStringAppendFormat(description, NULL, CFSTR("%@%@ %@"), separator, peer, sig);
 725         separator = peerSep;
 726     });
 727
 728     //applicants
 729     CFStringAppend(description, CFSTR("], A:["));
 730     separator = initPeerSep;
 731     if(CFSetGetCount(c->applicants) == 0 )
 732         CFStringAppendFormat(description, NULL, CFSTR("-"));
 733     else{
 734
 735         SOSCircleForEachApplicant(c, ^(SOSPeerInfoRef peer) {
 736             CFStringAppendFormat(description, NULL, CFSTR("%@%@"), separator, peer);
 737             separator = peerSep;
 738         });
 739     }
 740
 741     //rejected
 742     CFStringAppend(description, CFSTR("], R:["));
 743     separator = initPeerSep;
 744     if(CFSetGetCount(c->rejected_applicants) == 0)
 745         CFStringAppendFormat(description, NULL, CFSTR("-"));
 746     else{
 747         CFSetForEach(c->rejected_applicants, ^(const void *value) {
 748             SOSPeerInfoRef peer = (SOSPeerInfoRef) value;
 749             CFStringAppendFormat(description, NULL, CFSTR("%@%@"), separator, peer);
 750             separator = peerSep;
 751         });
 752     }
 753     CFStringAppend(description, CFSTR("]>"));
 754     return description;
 755
 756 }
 757 static CFMutableStringRef descriptionCreateWithFormatOptions(CFTypeRef aObj, CFDictionaryRef formatOptions){
 758     SOSCircleRef c = (SOSCircleRef) aObj;
 759
 760     CFMutableStringRef description = CFStringCreateMutable(kCFAllocatorDefault, 0);
 761
 762     if(CFDictionaryContainsKey(formatOptions, CFSTR("SyncD"))) {
 763         CFStringRef generationDescription = SOSGenerationCountCopyDescription(c->generation);
 764         CFStringAppendFormat(description, NULL, CFSTR("<C: gen:'%@' %@>\n"), generationDescription, c->name);
 765         CFReleaseNull(generationDescription);
 766         __block CFStringRef separator = CFSTR("\t\t");
 767         SOSCircleForEachActivePeer(c, ^(SOSPeerInfoRef peer) {
 768             CFStringRef sig = NULL;
 769             if (SOSCircleVerifyPeerSigned(c, peer, NULL)) {
 770                 sig = CFSTR("√");
 771             } else {
 772                 SecKeyRef pub_key = SOSPeerInfoCopyPubKey(peer, NULL);
 773                 CFDataRef signature = pub_key ? SOSCircleGetSignature(c, pub_key, NULL) : NULL;
 774                 sig = (signature == NULL) ? CFSTR("-") : CFSTR("?");
 775                 CFReleaseNull(pub_key);
 776             }
 777
 778             CFStringAppendFormat(description, formatOptions, CFSTR("%@%@ %@"), separator, peer, sig);
 779             separator = CFSTR("\n\t\t");
 780         });
 781         CFStringAppend(description, CFSTR("\n\t\t<A:["));
 782         separator = CFSTR("");
 783
 784         //applicants list
 785         if(CFSetGetCount(c->applicants) == 0 )
 786             CFStringAppendFormat(description, NULL, CFSTR("-"));
 787         else{
 788
 789             SOSCircleForEachApplicant(c, ^(SOSPeerInfoRef peer) {
 790                 CFStringAppendFormat(description, formatOptions, CFSTR("%@A: %@"), separator, peer);
 791                 separator = CFSTR("\n\t\t\t");
 792             });
 793         }
 794         //rejected list
 795         CFStringAppend(description, CFSTR("]> \n\t\t<R:["));
 796         separator = CFSTR("");
 797         if(CFSetGetCount(c->rejected_applicants) == 0)
 798             CFStringAppendFormat(description, NULL, CFSTR("-"));
 799         else{
 800             CFSetForEach(c->rejected_applicants, ^(const void *value) {
 801                 SOSPeerInfoRef peer = (SOSPeerInfoRef) value;
 802                 CFStringAppendFormat(description, formatOptions, CFSTR("%@R: %@"), separator, peer);
 803                 separator = CFSTR("\n\t\t");
 804             });
 805         }
 806         CFStringAppend(description, CFSTR("]>"));
 807     }
 808
 809     else{
 810         CFReleaseNull(description);
 811         description = defaultDescriptionCreate(aObj);
 812     }
 813
 814     return description;
 815
 816 }
 817
 818
 819 static CFStringRef SOSCircleCopyFormatDescription(CFTypeRef aObj, CFDictionaryRef formatOptions) {
 820     SOSCircleRef c = (SOSCircleRef) aObj;
 821     SOSCircleAssertStable(c);
 822     CFMutableStringRef description = NULL;
 823
 824     if(formatOptions != NULL){
 825         description = descriptionCreateWithFormatOptions(aObj, formatOptions);
 826     }
 827     else{
 828         description = defaultDescriptionCreate(aObj);
 829     }
 830     return description;
 831 }
 832
 833 CFStringRef SOSCircleGetName(SOSCircleRef circle) {
 834     assert(circle);
 835     assert(circle->name);
 836     return circle->name;
 837 }
 838
 839 const char *SOSCircleGetNameC(SOSCircleRef circle) {
 840     CFStringRef name = SOSCircleGetName(circle);
 841     if (!name)
 842         return strdup("");
 843     return CFStringToCString(name);
 844 }
 845
 846 SOSGenCountRef SOSCircleGetGeneration(SOSCircleRef circle) {
 847     assert(circle);
 848     assert(circle->generation);
 849     return circle->generation;
 850 }
 851
 852 void SOSCircleSetGeneration(SOSCircleRef circle, SOSGenCountRef gencount) {
 853     assert(circle);
 854     CFReleaseNull(circle->generation);
 855     circle->generation = CFRetainSafe(gencount);
 856 }
 857
 858 int64_t SOSCircleGetGenerationSint(SOSCircleRef circle) {
 859     SOSGenCountRef gen = SOSCircleGetGeneration(circle);
 860     return SOSGetGenerationSint(gen);
 861 }
 862
 863 void SOSCircleGenerationSetValue(SOSCircleRef circle, int64_t value) {
 864     CFAssignRetained(circle->generation, SOSGenerationCreateWithValue(value));
 865 }
 866
 867 void SOSCircleGenerationIncrement(SOSCircleRef circle) {
 868     SOSGenCountRef old = circle->generation;
 869     circle->generation = SOSGenerationIncrementAndCreate(old);
 870     CFReleaseNull(old);
 871 }
 872
 873 int SOSCircleCountPeers(SOSCircleRef circle) {
 874     SOSCircleAssertStable(circle);
 875     __block int count = 0;
 876     SOSCircleForEachPeer(circle, ^(SOSPeerInfoRef peer) {
 877         ++count;
 878     });
 879     return count;
 880 }
 881
 882 int SOSCircleCountActivePeers(SOSCircleRef circle) {
 883     SOSCircleAssertStable(circle);
 884     __block int count = 0;
 885     SOSCircleForEachActivePeer(circle, ^(SOSPeerInfoRef peer) {
 886         ++count;
 887     });
 888     return count;
 889 }
 890
 891 int SOSCircleCountActiveValidPeers(SOSCircleRef circle, SecKeyRef pubkey) {
 892     SOSCircleAssertStable(circle);
 893     __block int count = 0;
 894     SOSCircleForEachActiveValidPeer(circle, pubkey, ^(SOSPeerInfoRef peer) {
 895         ++count;
 896     });
 897     return count;
 898 }
 899
 900 int SOSCircleCountValidSyncingPeers(SOSCircleRef circle, SecKeyRef pubkey) {
 901     SOSCircleAssertStable(circle);
 902     __block int count = 0;
 903     SOSCircleForEachValidSyncingPeer(circle, pubkey, ^(SOSPeerInfoRef peer) {
 904         ++count;
 905     });
 906     return count;
 907
 908 }
 909
 910 int SOSCircleCountRetiredPeers(SOSCircleRef circle) {
 911     SOSCircleAssertStable(circle);
 912     __block int count = 0;
 913     SOSCircleForEachRetiredPeer(circle, ^(SOSPeerInfoRef peer) {
 914         ++count;
 915     });
 916     return count;
 917 }
 918
 919 int SOSCircleCountApplicants(SOSCircleRef circle) {
 920     SOSCircleAssertStable(circle);
 921
 922     return (int)CFSetGetCount(circle->applicants);
 923 }
 924
 925 bool SOSCircleHasApplicant(SOSCircleRef circle, SOSPeerInfoRef peerInfo, CFErrorRef *error) {
 926     SOSCircleAssertStable(circle);
 927
 928     return CFSetContainsValue(circle->applicants, peerInfo);
 929 }
 930
 931 CFMutableSetRef SOSCircleCopyApplicants(SOSCircleRef circle, CFAllocatorRef allocator) {
 932     SOSCircleAssertStable(circle);
 933
 934     return CFSetCreateMutableCopy(allocator, 0, circle->applicants);
 935 }
 936
 937 int SOSCircleCountRejectedApplicants(SOSCircleRef circle) {
 938     SOSCircleAssertStable(circle);
 939
 940     return (int)CFSetGetCount(circle->rejected_applicants);
 941 }
 942
 943 bool SOSCircleHasRejectedApplicant(SOSCircleRef circle, SOSPeerInfoRef peerInfo, CFErrorRef *error) {
 944     SOSCircleAssertStable(circle);
 945     return CFSetContainsValue(circle->rejected_applicants, peerInfo);
 946 }
 947
 948 SOSPeerInfoRef SOSCircleCopyRejectedApplicant(SOSCircleRef circle, SOSPeerInfoRef peerInfo, CFErrorRef *error) {
 949     SOSCircleAssertStable(circle);
 950     return CFRetainSafe((SOSPeerInfoRef)CFSetGetValue(circle->rejected_applicants, peerInfo));
 951 }
 952
 953 CFMutableArrayRef SOSCircleCopyRejectedApplicants(SOSCircleRef circle, CFAllocatorRef allocator) {
 954     SOSCircleAssertStable(circle);
 955
 956     return CFSetCopyValuesCFArray(circle->rejected_applicants);
 957 }
 958
 959 bool SOSCircleResetToEmpty(SOSCircleRef circle, CFErrorRef *error) {
 960     CFSetRemoveAllValues(circle->applicants);
 961     CFSetRemoveAllValues(circle->rejected_applicants);
 962     CFSetRemoveAllValues(circle->peers);
 963     CFDictionaryRemoveAllValues(circle->signatures);
 964     SOSGenCountRef oldGen = SOSCircleGetGeneration(circle);
 965     SOSGenCountRef newGen = SOSGenerationCreateWithBaseline(oldGen);
 966     SOSCircleSetGeneration(circle, newGen);
 967     CFReleaseSafe(newGen);
 968     return true;
 969 }
 970
 971 bool SOSCircleResetToEmptyWithSameGeneration(SOSCircleRef circle, CFErrorRef *error) {
 972     SOSGenCountRef gen = SOSGenerationCopy(SOSCircleGetGeneration(circle));
 973     SOSCircleResetToEmpty(circle, error);
 974     SOSCircleSetGeneration(circle, gen);
 975     CFReleaseNull(gen);
 976     return true;
 977 }
 978
 979 bool SOSCircleResetToOffering(SOSCircleRef circle, SecKeyRef user_privkey, SOSFullPeerInfoRef requestor, CFErrorRef *error){
 980
 981     return SOSCircleResetToEmpty(circle, error)
 982         && SOSCircleRequestAdmission(circle, user_privkey, requestor, error)
 983         && SOSCircleAcceptRequest(circle, user_privkey, requestor, SOSFullPeerInfoGetPeerInfo(requestor), error);
 984 }
 985
 986 bool SOSCircleRemoveRetired(SOSCircleRef circle, CFErrorRef *error) {
 987     CFSetRemoveAllPassing(circle->peers,  ^ bool (const void *element) {
 988         SOSPeerInfoRef peer = (SOSPeerInfoRef) element;
 989
 990         return SOSPeerInfoIsRetirementTicket(peer);
 991     });
 992
 993     return true;
 994 }
 995
 996 static bool SOSCircleRecordAdmissionRequest(SOSCircleRef circle, SecKeyRef user_pubkey, SOSPeerInfoRef requestorPeerInfo, CFErrorRef *error) {
 997     SOSCircleAssertStable(circle);
 998
 999     bool isPeer = SOSCircleHasPeer(circle, requestorPeerInfo, error);
1000
1001     require_action_quiet(!isPeer, fail, SOSCreateError(kSOSErrorAlreadyPeer, CFSTR("Cannot request admission when already a peer"), NULL, error));
1002
1003     // This adds to applicants and will take off rejected if it's there.
1004     CFSetTransferObject(requestorPeerInfo, circle->rejected_applicants, circle->applicants);
1005
1006     return true;
1007
1008 fail:
1009     return false;
1010
1011 }
1012
1013 bool SOSCircleRequestReadmission(SOSCircleRef circle, SecKeyRef user_pubkey, SOSPeerInfoRef peer, CFErrorRef *error) {
1014     bool success = false;
1015
1016     require_quiet(SOSPeerInfoApplicationVerify(peer, user_pubkey, error), fail);
1017     success = SOSCircleRecordAdmissionRequest(circle, user_pubkey, peer, error);
1018 fail:
1019     return success;
1020 }
1021
1022 bool SOSCircleRequestAdmission(SOSCircleRef circle, SecKeyRef user_privkey, SOSFullPeerInfoRef requestor, CFErrorRef *error) {
1023     bool success = false;
1024
1025     SecKeyRef user_pubkey = SecKeyCreatePublicFromPrivate(user_privkey);
1026     require_action_quiet(user_pubkey, fail, SOSCreateError(kSOSErrorBadKey, CFSTR("No public key for key"), NULL, error));
1027
1028     require(SOSFullPeerInfoPromoteToApplication(requestor, user_privkey, error), fail);
1029
1030     success = SOSCircleRecordAdmissionRequest(circle, user_pubkey, SOSFullPeerInfoGetPeerInfo(requestor), error);
1031 fail:
1032     CFReleaseNull(user_pubkey);
1033     return success;
1034 }
1035
1036 static bool sosCircleUpdatePeerInfoSet(CFMutableSetRef theSet, SOSPeerInfoRef replacement_peer_info) {
1037     CFTypeRef old = NULL;
1038     if(!replacement_peer_info) return false;
1039     if(!(old = CFSetGetValue(theSet, replacement_peer_info))) return false;
1040     if(CFEqualSafe(old, replacement_peer_info)) return false;
1041     CFSetReplaceValue(theSet, replacement_peer_info);
1042     return true;
1043 }
1044
1045 bool SOSCircleUpdatePeerInfo(SOSCircleRef circle, SOSPeerInfoRef replacement_peer_info) {
1046     if(sosCircleUpdatePeerInfoSet(circle->peers, replacement_peer_info)) return true;
1047     if(sosCircleUpdatePeerInfoSet(circle->applicants, replacement_peer_info)) return true;
1048     if(sosCircleUpdatePeerInfoSet(circle->rejected_applicants, replacement_peer_info)) return true;
1049     return false;
1050 }
1051
1052 static bool SOSCircleRemovePeerInternal(SOSCircleRef circle, SOSFullPeerInfoRef requestor, SOSPeerInfoRef peer_to_remove, CFErrorRef *error) {
1053     SOSPeerInfoRef requestor_peer_info = SOSFullPeerInfoGetPeerInfo(requestor);
1054
1055     if (SOSCircleHasPeer(circle, peer_to_remove, NULL)) {
1056         if (!SOSCircleHasPeer(circle, requestor_peer_info, error)) {
1057             SOSCreateError(kSOSErrorAlreadyPeer, CFSTR("Must be peer to remove peer"), NULL, error);
1058             return false;
1059         }
1060         CFSetRemoveValue(circle->peers, peer_to_remove);
1061     }
1062
1063     if (SOSCircleHasApplicant(circle, peer_to_remove, error)) {
1064         return SOSCircleRejectRequest(circle, requestor, peer_to_remove, error);
1065     }
1066
1067     return true;
1068 }
1069
1070 bool SOSCircleRemovePeers(SOSCircleRef circle, SecKeyRef user_privkey, SOSFullPeerInfoRef requestor, CFSetRef peersToRemove, CFErrorRef *error) {
1071
1072     bool success = false;
1073
1074     __block bool removed_all = true;
1075     CFSetForEach(peersToRemove, ^(const void *value) {
1076         SOSPeerInfoRef peerInfo = asSOSPeerInfo(value);
1077         if (peerInfo) {
1078             removed_all &= SOSCircleRemovePeerInternal(circle, requestor, peerInfo, error);
1079         }
1080     });
1081
1082     require_quiet(removed_all, exit);
1083
1084     require_quiet(SOSCircleGenerationSign(circle, user_privkey, requestor, error), exit);
1085
1086     success = true;
1087
1088 exit:
1089     return success;
1090 }
1091
1092
1093 bool SOSCircleRemovePeersByID(SOSCircleRef circle, SecKeyRef user_privkey, SOSFullPeerInfoRef requestor, CFSetRef peersToRemove, CFErrorRef *error) {
1094
1095     bool success = false;
1096
1097     __block bool removed_all = true;
1098     CFSetForEach(peersToRemove, ^(const void *value) {
1099         CFStringRef peerID = asString(value, NULL);
1100         if(peerID) {
1101             SOSPeerInfoRef peerInfo = SOSCircleCopyPeerInfo(circle, peerID, NULL);
1102             if (peerInfo) {
1103                 removed_all &= SOSCircleRemovePeerInternal(circle, requestor, peerInfo, error);
1104                 CFReleaseNull(peerInfo);
1105             }
1106         }
1107     });
1108
1109     require_quiet(removed_all, exit);
1110
1111     require_quiet(SOSCircleGenerationSign(circle, user_privkey, requestor, error), exit);
1112
1113     success = true;
1114
1115 exit:
1116     return success;
1117 }
1118
1119 static bool SOSCircleRemovePeerUnsigned(SOSCircleRef circle, SOSPeerInfoRef peer_to_remove) {
1120     bool retval = false;
1121     if (SOSCircleHasPeer(circle, peer_to_remove, NULL)) {
1122         CFSetRemoveValue(circle->peers, peer_to_remove);
1123         retval = true;
1124     }
1125     return retval;
1126 }
1127
1128 bool SOSCircleRemovePeersByIDUnsigned(SOSCircleRef circle, CFSetRef peersToRemove) {
1129     __block bool removed_all = true;
1130     CFSetForEach(peersToRemove, ^(const void *value) {
1131         CFStringRef peerID = asString(value, NULL);
1132         SOSPeerInfoRef peerInfo = SOSCircleCopyPeerInfo(circle, peerID, NULL);
1133         removed_all &= SOSCircleRemovePeerUnsigned(circle, peerInfo);
1134         CFReleaseNull(peerInfo);
1135     });
1136     return removed_all;
1137 }
1138
1139 bool SOSCircleRemovePeer(SOSCircleRef circle, SecKeyRef user_privkey, SOSFullPeerInfoRef requestor, SOSPeerInfoRef peer_to_remove, CFErrorRef *error) {
1140     bool success = false;
1141
1142     require_quiet(SOSCircleRemovePeerInternal(circle, requestor, peer_to_remove, error), exit);
1143
1144     require_quiet(SOSCircleGenerationSign(circle, user_privkey, requestor, error), exit);
1145
1146     success = true;
1147 exit:
1148     return success;
1149 }
1150
1151 bool SOSCircleAcceptRequest(SOSCircleRef circle, SecKeyRef user_privkey, SOSFullPeerInfoRef device_approver, SOSPeerInfoRef peerInfo, CFErrorRef *error) {
1152     SOSCircleAssertStable(circle);
1153
1154     SecKeyRef publicKey = NULL;
1155     bool result = false;
1156
1157     require_action_quiet(CFSetContainsValue(circle->applicants, peerInfo), fail,
1158                          SOSCreateError(kSOSErrorNotApplicant, CFSTR("Cannot accept non-applicant"), NULL, error));
1159
1160     publicKey = SecKeyCreatePublicFromPrivate(user_privkey);
1161     require_quiet(SOSPeerInfoApplicationVerify(peerInfo, publicKey, error), fail);
1162
1163     CFSetTransferObject(peerInfo, circle->applicants, circle->peers);
1164
1165     result = SOSCircleGenerationSign(circle, user_privkey, device_approver, error);
1166
1167 fail:
1168     CFReleaseNull(publicKey);
1169     return result;
1170 }
1171
1172 bool SOSCircleWithdrawRequest(SOSCircleRef circle, SOSPeerInfoRef peerInfo, CFErrorRef *error) {
1173     SOSCircleAssertStable(circle);
1174
1175     CFSetRemoveValue(circle->applicants, peerInfo);
1176
1177     return true;
1178 }
1179
1180 bool SOSCircleRemoveRejectedPeer(SOSCircleRef circle, SOSPeerInfoRef peerInfo, CFErrorRef *error) {
1181     SOSCircleAssertStable(circle);
1182
1183     CFSetRemoveValue(circle->rejected_applicants, peerInfo);
1184
1185     return true;
1186 }
1187
1188
1189 bool SOSCircleRejectRequest(SOSCircleRef circle, SOSFullPeerInfoRef device_rejector,
1190                             SOSPeerInfoRef peerInfo, CFErrorRef *error) {
1191     SOSCircleAssertStable(circle);
1192
1193     if (CFEqual(SOSPeerInfoGetPeerID(peerInfo), SOSPeerInfoGetPeerID(SOSFullPeerInfoGetPeerInfo(device_rejector))))
1194         return SOSCircleWithdrawRequest(circle, peerInfo, error);
1195
1196     if (!CFSetContainsValue(circle->applicants, peerInfo)) {
1197         SOSCreateError(kSOSErrorNotApplicant, CFSTR("Cannot reject non-applicant"), NULL, error);
1198         return false;
1199     }
1200
1201     CFSetTransferObject(peerInfo, circle->applicants, circle->rejected_applicants);
1202
1203     // TODO: Maybe we sign the rejection with device_rejector.
1204
1205     return true;
1206 }
1207
1208 bool SOSCircleAcceptRequests(SOSCircleRef circle, SecKeyRef user_privkey, SOSFullPeerInfoRef device_approver,
1209                              CFErrorRef *error) {
1210     // Returns true if we accepted someone and therefore have to post the circle back to KVS
1211     __block bool result = false;
1212
1213     SOSCircleForEachApplicant(circle, ^(SOSPeerInfoRef peer) {
1214         if (!SOSCircleAcceptRequest(circle, user_privkey, device_approver, peer, error)) {
1215             secnotice("circle", "error in SOSCircleAcceptRequest\n");
1216         } else {
1217             secnotice("circle", "Accepted peer: %@", peer);
1218             result = true;
1219         }
1220     });
1221
1222     if (result) {
1223         SOSCircleGenerationSign(circle, user_privkey, device_approver, error);
1224         secnotice("circle", "Countersigned accepted requests");
1225     }
1226
1227     return result;
1228 }
1229
1230 bool SOSCirclePeerSigUpdate(SOSCircleRef circle, SecKeyRef userPrivKey, SOSFullPeerInfoRef fpi,
1231                              CFErrorRef *error) {
1232     // Returns true if we accepted someone and therefore have to post the circle back to KVS
1233     __block bool result = false;
1234     SecKeyRef userPubKey = SecKeyCreatePublicFromPrivate(userPrivKey);
1235
1236     // We're going to remove any applicants using a mismatched user key.
1237     SOSCircleForEachApplicant(circle, ^(SOSPeerInfoRef peer) {
1238         if(!SOSPeerInfoApplicationVerify(peer, userPubKey, NULL)) {
1239             if(!SOSCircleRejectRequest(circle, fpi, peer, NULL)) {
1240                 // do we care?
1241             }
1242         }
1243     });
1244
1245     result = SOSCircleUpdatePeerInfo(circle, SOSFullPeerInfoGetPeerInfo(fpi));
1246
1247     if (result) {
1248         SOSCircleGenerationSign(circle, userPrivKey, fpi, error);
1249         secnotice("circle", "Generation signed updated signatures on peerinfo");
1250     }
1251
1252     return result;
1253 }
1254
1255 //
1256 // Peer iteration and membership
1257 //
1258
1259 static inline void SOSCircleForEachPeerMatching(SOSCircleRef circle,
1260                                                 void (^action)(SOSPeerInfoRef peer),
1261                                                 bool (^condition)(SOSPeerInfoRef peer)) {
1262     CFSetForEach(circle->peers, ^(const void *value) {
1263         SOSPeerInfoRef peer = (SOSPeerInfoRef) value;
1264         if (condition(peer))
1265             action(peer);
1266     });
1267 }
1268
1269 static inline bool isHiddenPeer(SOSPeerInfoRef peer) {
1270     return SOSPeerInfoIsRetirementTicket(peer) || SOSPeerInfoIsCloudIdentity(peer);
1271 }
1272
1273 void SOSCircleForEachPeer(SOSCircleRef circle, void (^action)(SOSPeerInfoRef peer)) {
1274     SOSCircleForEachPeerMatching(circle, action, ^bool(SOSPeerInfoRef peer) {
1275         return !isHiddenPeer(peer);
1276     });
1277 }
1278
1279 void SOSCircleForEachRetiredPeer(SOSCircleRef circle, void (^action)(SOSPeerInfoRef peer)) {
1280     SOSCircleForEachPeerMatching(circle, action, ^bool(SOSPeerInfoRef peer) {
1281         return SOSPeerInfoIsRetirementTicket(peer);
1282     });
1283 }
1284
1285 void SOSCircleForEachiCloudIdentityPeer(SOSCircleRef circle, void (^action)(SOSPeerInfoRef peer)) {
1286     SOSCircleForEachPeerMatching(circle, action, ^bool(SOSPeerInfoRef peer) {
1287         return SOSPeerInfoIsCloudIdentity(peer);
1288     });
1289 }
1290
1291
1292 void SOSCircleForEachActivePeer(SOSCircleRef circle, void (^action)(SOSPeerInfoRef peer)) {
1293     SOSCircleForEachPeerMatching(circle, action, ^bool(SOSPeerInfoRef peer) {
1294         return true;
1295     });
1296 }
1297
1298 void SOSCircleForEachActiveValidPeer(SOSCircleRef circle, SecKeyRef user_public_key, void (^action)(SOSPeerInfoRef peer)) {
1299     SOSCircleForEachPeerMatching(circle, action, ^bool(SOSPeerInfoRef peer) {
1300         return SOSPeerInfoApplicationVerify(peer, user_public_key, NULL);
1301     });
1302 }
1303
1304 void SOSCircleForEachValidPeer(SOSCircleRef circle, SecKeyRef user_public_key, void (^action)(SOSPeerInfoRef peer)) {
1305     SOSCircleForEachPeerMatching(circle, action, ^bool(SOSPeerInfoRef peer) {
1306         return !isHiddenPeer(peer) && SOSPeerInfoApplicationVerify(peer, user_public_key, NULL);
1307     });
1308 }
1309
1310 void SOSCircleForEachValidSyncingPeer(SOSCircleRef circle, SecKeyRef user_public_key, void (^action)(SOSPeerInfoRef peer)) {
1311     SOSCircleForEachValidPeer(circle, user_public_key, action);
1312 }
1313
1314 void SOSCircleForEachBackupCapablePeerForView(SOSCircleRef circle, SecKeyRef user_public_key, CFStringRef viewName, void (^action)(SOSPeerInfoRef peer)) {
1315     SOSCircleForEachPeerMatching(circle, action, ^bool(SOSPeerInfoRef peer) {
1316         return (!isHiddenPeer(peer) && SOSPeerInfoIsEnabledView(peer, viewName) /* let the wookie win --- && SOSPeerInfoHasBackupKey(peer)*/ && SOSPeerInfoApplicationVerify(peer, user_public_key, NULL));
1317     });
1318 }
1319
1320 void SOSCircleForEachApplicant(SOSCircleRef circle, void (^action)(SOSPeerInfoRef peer)) {
1321     CFSetForEach(circle->applicants, ^(const void*value) { action((SOSPeerInfoRef) value); } );
1322 }
1323
1324
1325 bool SOSCircleHasPeerWithID(SOSCircleRef circle, CFStringRef peerid, CFErrorRef *error) {
1326     SOSCircleAssertStable(circle);
1327
1328     SOSPeerInfoRef found = asSOSPeerInfo(CFSetGetValue(circle->peers, peerid));
1329     return found && !isHiddenPeer(found);
1330 }
1331
1332 SOSPeerInfoRef SOSCircleCopyPeerWithID(SOSCircleRef circle, CFStringRef peerid, CFErrorRef *error) {
1333     SOSCircleAssertStable(circle);
1334
1335     SOSPeerInfoRef found = asSOSPeerInfo(CFSetGetValue(circle->peers, peerid));
1336     return found ? SOSPeerInfoCreateCopy(kCFAllocatorDefault, found, NULL) : NULL;
1337 }
1338
1339 bool SOSCircleHasPeer(SOSCircleRef circle, SOSPeerInfoRef peerInfo, CFErrorRef *error) {
1340     if(!peerInfo) return false;
1341     return SOSCircleHasPeerWithID(circle, SOSPeerInfoGetPeerID(peerInfo), error);
1342 }
1343
1344 bool SOSCircleHasActivePeerWithID(SOSCircleRef circle, CFStringRef peerid, CFErrorRef *error) {
1345     SOSCircleAssertStable(circle);
1346     SOSPeerInfoRef found = asSOSPeerInfo(CFSetGetValue(circle->peers, peerid));
1347     return found;
1348 }
1349
1350 bool SOSCircleHasActivePeer(SOSCircleRef circle, SOSPeerInfoRef peerInfo, CFErrorRef *error) {
1351     if(!peerInfo) return false;
1352     return SOSCircleHasActivePeerWithID(circle, SOSPeerInfoGetPeerID(peerInfo), error);
1353 }
1354
1355 bool SOSCircleHasActiveValidPeerWithID(SOSCircleRef circle, CFStringRef peerid, SecKeyRef user_public_key, CFErrorRef *error) {
1356     SOSCircleAssertStable(circle);
1357     SOSPeerInfoRef found = asSOSPeerInfo(CFSetGetValue(circle->peers, peerid));
1358     return found && SOSPeerInfoApplicationVerify(found, user_public_key, NULL);
1359 }
1360
1361 bool SOSCircleHasValidSyncingPeer(SOSCircleRef circle, SOSPeerInfoRef peerInfo, SecKeyRef user_public_key, CFErrorRef *error) {
1362     SOSCircleAssertStable(circle);
1363     SOSPeerInfoRef found = asSOSPeerInfo(CFSetGetValue(circle->peers, peerInfo));
1364     return found && !isHiddenPeer(found) && SOSPeerInfoApplicationVerify(found, user_public_key, NULL);
1365 }
1366
1367 bool SOSCircleHasActiveValidPeer(SOSCircleRef circle, SOSPeerInfoRef peerInfo, SecKeyRef user_public_key, CFErrorRef *error) {
1368     if(!peerInfo) return false;
1369     return SOSCircleHasActiveValidPeerWithID(circle, SOSPeerInfoGetPeerID(peerInfo), user_public_key, error);
1370 }
1371
1372
1373 CFMutableSetRef SOSCircleCopyPeers(SOSCircleRef circle, CFAllocatorRef allocator) {
1374     SOSCircleAssertStable(circle);
1375
1376     CFMutableSetRef result = CFSetCreateMutableForSOSPeerInfosByID(allocator);
1377
1378     SOSCircleForEachPeer(circle, ^(SOSPeerInfoRef peer) {
1379         CFSetAddValue(result, peer);
1380     });
1381
1382     return result;
1383 }
1384
1385
1386 CFMutableSetRef SOSCircleCopyBackupCapablePeersForView(SOSCircleRef circle, CFAllocatorRef allocator, SecKeyRef userPubKey, CFStringRef viewName) {
1387     SOSCircleAssertStable(circle);
1388
1389     CFMutableSetRef result = CFSetCreateMutableForSOSPeerInfosByID(allocator);
1390
1391     SOSCircleForEachBackupCapablePeerForView(circle, userPubKey, viewName, ^(SOSPeerInfoRef peer) {
1392         CFSetAddValue(result, peer);
1393     });
1394
1395     return result;
1396 }
1397
1398 bool SOSCircleAppendConcurringPeers(SOSCircleRef circle, CFMutableArrayRef appendHere, CFErrorRef *error) {
1399     SOSCircleForEachActivePeer(circle, ^(SOSPeerInfoRef peer) {
1400         CFErrorRef localError = NULL;
1401         if (SOSCircleVerifyPeerSigned(circle, peer, &localError)) {
1402             SOSPeerInfoRef peerInfo = SOSPeerInfoCreateCopy(kCFAllocatorDefault, peer, error);
1403             CFArrayAppendValue(appendHere, peerInfo);
1404             CFRelease(peerInfo);
1405         } else if (error != NULL) {
1406             secerror("Error checking concurrence: %@", localError);
1407         }
1408         CFReleaseNull(localError);
1409     });
1410
1411     return true;
1412 }
1413
1414 CFMutableArrayRef SOSCircleCopyConcurringPeers(SOSCircleRef circle, CFErrorRef* error) {
1415     SOSCircleAssertStable(circle);
1416
1417     CFMutableArrayRef concurringPeers = CFArrayCreateMutableForCFTypes(kCFAllocatorDefault);
1418
1419     if (!SOSCircleAppendConcurringPeers(circle, concurringPeers, error))
1420         CFReleaseNull(concurringPeers);
1421
1422     return concurringPeers;
1423 }
1424
1425 SOSFullPeerInfoRef SOSCircleCopyiCloudFullPeerInfoRef(SOSCircleRef circle, CFErrorRef *error) {
1426     __block SOSFullPeerInfoRef cloud_full_peer = NULL;
1427     __block CFErrorRef searchError = NULL;
1428     SOSCircleForEachActivePeer(circle, ^(SOSPeerInfoRef peer) {
1429         if (SOSPeerInfoIsCloudIdentity(peer)) {
1430             if (cloud_full_peer == NULL) {
1431                 if (searchError) {
1432                     secerror("More than one cloud identity found, first had error, trying new one.");
1433                 }
1434                 CFReleaseNull(searchError);
1435                 cloud_full_peer = SOSFullPeerInfoCreateCloudIdentity(kCFAllocatorDefault, peer, &searchError);
1436                 if (!cloud_full_peer) {
1437                     secnotice("icloud-identity", "Failed to make FullPeer for iCloud Identity: %@ (%@)", cloud_full_peer, searchError);
1438                 }
1439             } else {
1440                 secerror("Additional cloud identity found in circle after successful creation: %@", circle);
1441             }
1442         }
1443     });
1444     // If we didn't find one at all, report the error.
1445     if (cloud_full_peer == NULL && searchError == NULL) {
1446         SOSErrorCreate(kSOSErrorNoiCloudPeer, &searchError, NULL, CFSTR("No iCloud identity PeerInfo found in circle"));
1447         secnotice("icloud-identity", "No iCloud identity PeerInfo found in circle");
1448     }
1449     if (error) {
1450         CFTransferRetained(*error, searchError);
1451     }
1452     CFReleaseNull(searchError);
1453     return cloud_full_peer;
1454 }
1455
1456 SOSFullPeerInfoRef SOSCircleCopyiCloudFullPeerInfoVerifier(SOSCircleRef circle, CFErrorRef *error) {
1457     __block CFErrorRef searchError = NULL;
1458     __block SOSFullPeerInfoRef cloud_full_peer = NULL;
1459     SOSCircleForEachActivePeer(circle, ^(SOSPeerInfoRef peer) {
1460         // There should only ever be one signing iCloud identity.  If there are more we'll take the first one.
1461         if (!cloud_full_peer && SOSPeerInfoIsCloudIdentity(peer) && SOSCircleVerifyPeerSignatureExists(circle, peer)) {
1462             cloud_full_peer = SOSFullPeerInfoCreateCloudIdentity(kCFAllocatorDefault, peer, &searchError);
1463         }
1464     });
1465     // If we didn't find one at all, report the error.
1466     if (cloud_full_peer == NULL && searchError == NULL) {
1467         SOSErrorCreate(kSOSErrorNoiCloudPeer, &searchError, NULL, CFSTR("No iCloud identity PeerInfo found in circle"));
1468         secnotice("icloud-identity", "No iCloud identity PeerInfo found in circle");
1469     }
1470     if (error) {
1471         CFTransferRetained(*error, searchError);
1472     }
1473     CFReleaseNull(searchError);
1474     return cloud_full_peer;
1475 }
1476
1477 void debugDumpCircle(CFStringRef message, SOSCircleRef circle) {
1478     CFErrorRef error;
1479
1480     secinfo("circledebug", "%@: %@", message, circle);
1481     if (!circle)
1482         return;
1483
1484     CFDataRef derdata = SOSCircleCopyEncodedData(circle, kCFAllocatorDefault, &error);
1485     if (derdata) {
1486         CFStringRef hex = CFDataCopyHexString(derdata);
1487         secinfo("circledebug", "Full contents: %@", hex);
1488         if (hex) CFRelease(hex);
1489         CFRelease(derdata);
1490     }
1491 }
1492
1493 bool SOSCircleAcceptPeerFromHSA2(SOSCircleRef circle, SecKeyRef userKey, SOSGenCountRef gencount, SecKeyRef pPubKey, CFDataRef signature, SOSFullPeerInfoRef fpi, CFErrorRef *error) {
1494     SOSPeerInfoRef peerInfo = SOSFullPeerInfoGetPeerInfo(fpi);
1495     bool res;
1496
1497     CFSetAddValue(circle->peers, peerInfo);
1498
1499     // Gen sign first, then add signature from our approver - remember gensign removes all existing sigs.
1500     res = SOSCircleGenerationSignWithGenCount(circle, userKey, fpi, gencount, error);
1501     if (!res) {
1502         secnotice("circleOps", "Failed to regenerate circle with new gen count: %@", error ? *error : NULL);
1503         return res;
1504     }
1505     res = SOSCircleSetSignature(circle, pPubKey, signature, error);
1506     if (!res) {
1507         secnotice("circleOps", "Failed to set signature: %@", error ? *error : NULL);
1508         return res;
1509     }
1510     res = SOSCircleVerify(circle, pPubKey, error);
1511     if (!res) {
1512         secnotice("circleOps", "Circle failed to validate after peer signature: %@", error ? *error : NULL);
1513         return res;
1514     }
1515     secnotice("circleOps", "Circle accepted successfully");
1516
1517     return true;
1518 }
1519
1520
1521 /*
1522  ccstatus: Not in Circle (1)
1523  Account user public is trusted
1524  Generation Count: [2016-05-19 15:53 4]
1525
1526  */
1527
1528 static inline void logPeerInfo(char *category, SOSCircleRef circle, SecKeyRef pubKey, CFStringRef myPID, SOSPeerInfoRef peer) {
1529     char sigchr = 'v';
1530     if (SOSCircleVerifyPeerSignatureExists(circle, peer)) {
1531         sigchr = 'V';
1532     }
1533     SOSPeerInfoLogState(category, peer, pubKey, myPID, sigchr);
1534 }
1535
1536 void SOSCircleLogState(char *category, SOSCircleRef circle, SecKeyRef pubKey, CFStringRef myPID) {
1537     if(!circle) return;
1538     CFStringRef genString = SOSGenerationCountCopyDescription(SOSCircleGetGeneration(circle));
1539     char sigchr = 'v';
1540     if(pubKey && SOSCircleVerifySignatureExists(circle, pubKey, NULL)) {
1541         sigchr = 'V';
1542     }
1543     secnotice(category, "CIRCLE:    [%20@] UserSigned: %c", genString, sigchr);
1544     if(CFSetGetCount(circle->peers) == 0 )
1545         secnotice(category, "Peers In Circle: None");
1546     else{
1547         secnotice(category, "Peers In Circle:");
1548         SOSCircleForEachPeer(circle, ^(SOSPeerInfoRef peer) {
1549             logPeerInfo(category, circle, pubKey, myPID, peer);
1550         });
1551         SOSCircleForEachRetiredPeer(circle, ^(SOSPeerInfoRef peer) {
1552             logPeerInfo(category, circle, pubKey, myPID, peer);
1553         });
1554         SOSCircleForEachiCloudIdentityPeer(circle, ^(SOSPeerInfoRef peer) {
1555             logPeerInfo(category, circle, pubKey, myPID, peer);
1556         });
1557     }
1558
1559     //applicants
1560     if(CFSetGetCount(circle->applicants) == 0 )
1561         secnotice(category, "Applicants To Circle: None");
1562     else{
1563         secnotice(category, "Applicants To Circle:");
1564
1565         SOSCircleForEachApplicant(circle, ^(SOSPeerInfoRef peer) {
1566             SOSPeerInfoLogState(category, peer, pubKey, myPID, 'v');
1567         });
1568     }
1569
1570     //rejected
1571     if(CFSetGetCount(circle->rejected_applicants) == 0)
1572         secnotice(category, "Rejected Applicants To Circle: None");
1573     else{
1574         secnotice(category, "Rejected Applicants To Circle:");
1575         CFSetForEach(circle->rejected_applicants, ^(const void *value) {
1576             SOSPeerInfoRef peer = (SOSPeerInfoRef) value;
1577             SOSPeerInfoLogState(category, peer, pubKey, myPID, 'v');
1578         });
1579     }
1580     CFReleaseNull(genString);
1581 }
1582