OSX/sec/securityd/Regressions/secd60-account-cloud-exposure.m

   1 /*
   2  * Copyright (c) 2013-2014 Apple Inc. All Rights Reserved.
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   6  * This file contains Original Code and/or Modifications of Original Code
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   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  *
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  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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  23
  24 //
  25 //  secd60-account-cloud-exposure.c
  26 //  sec
  27 //
  28
  29
  30
  31 #include <Security/SecBase.h>
  32 #include <Security/SecItem.h>
  33
  34 #include <CoreFoundation/CFDictionary.h>
  35
  36 #include <Security/SecureObjectSync/SOSAccount.h>
  37 #include <Security/SecureObjectSync/SOSPeerInfoPriv.h>
  38 #include <Security/SecureObjectSync/SOSCloudCircle.h>
  39 #include <Security/SecureObjectSync/SOSInternal.h>
  40 #include <Security/SecureObjectSync/SOSUserKeygen.h>
  41 #include <Security/SecureObjectSync/SOSTransport.h>
  42 #include <Security/SecureObjectSync/SOSAccountTrustClassic+Circle.h>
  43 #include <Security/SecureObjectSync/SOSAccountTrustClassic+Identity.h>
  44
  45 #include <stdlib.h>
  46 #include <unistd.h>
  47
  48 #include "secd_regressions.h"
  49 #include "SOSTestDataSource.h"
  50
  51 #include "SOSRegressionUtilities.h"
  52 #include <utilities/SecCFWrappers.h>
  53 #include <Security/SecKeyPriv.h>
  54
  55 #include <securityd/SOSCloudCircleServer.h>
  56
  57 #include "SOSAccountTesting.h"
  58
  59 #include "SecdTestKeychainUtilities.h"
  60
  61 static int kTestTestCount = 56;
  62
  63 static bool SOSAccountResetCircleToNastyOffering(SOSAccount* account, SecKeyRef userPriv, SOSPeerInfoRef pi, CFErrorRef *error) {
  64     bool result = false;
  65     SecKeyRef userPub = SecKeyCreatePublicFromPrivate(userPriv);
  66     SOSAccountTrustClassic *trust = account.trust;
  67     if(!SOSAccountHasCircle(account, error)){
  68         CFReleaseNull(userPub);
  69         return result;
  70     }
  71     if(![account.trust ensureFullPeerAvailable:(__bridge CFDictionaryRef)(account.gestalt) deviceID:(__bridge CFStringRef)(account.deviceID) backupKey:(__bridge CFDataRef)(account.backup_key) err:error]){
  72         CFReleaseNull(userPub);
  73         return result;
  74     }
  75     (void) [account.trust resetAllRings:account err:error];
  76
  77     [account.trust modifyCircle:account.circle_transport err:error action:^(SOSCircleRef circle) {
  78         bool result = false;
  79         CFErrorRef localError = NULL;
  80         SOSFullPeerInfoRef iCloudfpi = NULL;
  81
  82         //sleep(10);
  83         require_quiet(SOSCircleResetToEmpty(circle, error), err_out);
  84         require_quiet([account.trust addiCloudIdentity:circle key:userPriv err:error], err_out);
  85         require_quiet(iCloudfpi = SOSCircleCopyiCloudFullPeerInfoRef(circle, error), err_out);
  86
  87         /* Add the defenders peerInfo to circle */
  88         require_quiet(SOSCircleRequestReadmission(circle, userPub, pi, error), err_out);
  89         require_quiet(SOSCircleAcceptRequest(circle, userPriv, iCloudfpi, pi, error), err_out);
  90
  91         [trust setDepartureCode:kSOSNeverLeftCircle];
  92         result = true;
  93         SOSCircleRef copiedCircle = SOSCircleCopyCircle(kCFAllocatorDefault, circle, error); // I don't think this copy is necessary, but...
  94         [trust setTrustedCircle:copiedCircle];
  95         CFReleaseNull(copiedCircle);
  96         SOSAccountPublishCloudParameters(account, NULL);
  97         trust.fullPeerInfo = nil;
  98
  99     err_out:
 100         if (result == false) {
 101             secerror("error resetting circle (%@) to offering: %@", circle, localError);
 102         }
 103         if (localError && error && *error == NULL) {
 104             *error = localError;
 105             localError = NULL;
 106         }
 107
 108         CFReleaseNull(iCloudfpi);
 109         CFReleaseNull(localError);
 110         return result;
 111     }];
 112
 113     result = true;
 114
 115     return result;
 116 }
 117
 118 static bool SOSAccountResetToNastyOffering(SOSAccount* account, SOSPeerInfoRef pi, CFErrorRef* error) {
 119     SecKeyRef user_key = SOSAccountGetPrivateCredential(account, error);
 120     if (!user_key)
 121         return false;
 122
 123     SOSAccountTrustClassic* trust = account.trust;
 124     trust.fullPeerInfo = nil;
 125
 126     return user_key && SOSAccountResetCircleToNastyOffering(account, user_key, pi, error);
 127 }
 128
 129 static bool performiCloudIdentityAttack(SOSAccount* attacker, SOSAccount* defender, SOSAccount* accomplice, CFMutableDictionaryRef changes) {
 130     CFErrorRef error = NULL;
 131     bool retval = false;  // false means the attack succeeds
 132     CFArrayRef applicants = NULL;
 133     SOSAccountTrustClassic* defenderTrust = defender.trust;
 134
 135     /*----- Carole makes bogus circle with fake iCloud identity and Alice's peerInfo but only signed with fake iCloud identity -----*/
 136
 137     require_action_quiet(SOSAccountResetToNastyOffering(attacker, defenderTrust.peerInfo, &error), testDone, retval = true);
 138     CFReleaseNull(error);
 139
 140     ProcessChangesUntilNoChange(changes, defender, accomplice, attacker, NULL);
 141
 142     /*----- Now use our fake iCloud identity to get in to the circle for real -----*/
 143     require_action_quiet(SOSAccountJoinCirclesAfterRestore_wTxn(attacker, &error), testDone, retval = true);
 144     CFReleaseNull(error);
 145     require_action_quiet(countPeers(attacker) == 2, testDone, retval = true);
 146
 147     /*----- Let's see if carole can get bob into the circle and have alice believe it -----*/
 148     require_action_quiet(SOSAccountJoinCircles_wTxn(accomplice, &error), testDone, retval = true);
 149     CFReleaseNull(error);
 150
 151     ProcessChangesUntilNoChange(changes, defender, accomplice, attacker, NULL);
 152
 153     applicants = SOSAccountCopyApplicants(attacker, &error);
 154     CFReleaseNull(error);
 155
 156     if(CFArrayGetCount(applicants) > 0) {
 157         require_action_quiet(SOSAccountAcceptApplicants(attacker, applicants, &error), testDone, retval = true);
 158     }
 159
 160     ProcessChangesUntilNoChange(changes, defender, accomplice, attacker, NULL);
 161
 162     require_action_quiet(countPeers(defender) == 3, testDone, retval = true);
 163     require_action_quiet(countPeers(accomplice) == 3, testDone, retval = true);
 164     require_action_quiet(countPeers(attacker) == 3, testDone, retval = true);
 165
 166 testDone:
 167     CFReleaseNull(applicants);
 168     CFReleaseNull(error);
 169     return retval;
 170 }
 171
 172 static void tests(void)
 173 {
 174     CFErrorRef error = NULL;
 175     CFDataRef cfpassword = CFDataCreate(NULL, (uint8_t *) "FooFooFoo", 10);
 176     CFStringRef cfaccount = CFSTR("test@test.org");
 177
 178     CFMutableDictionaryRef changes = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
 179
 180     SOSAccount* alice_account = CreateAccountForLocalChanges( CFSTR("Alice"), CFSTR("TestSource"));
 181     SOSAccount* bob_account = CreateAccountForLocalChanges(CFSTR("Bob"), CFSTR("TestSource"));
 182     SOSAccount* carole_account = CreateAccountForLocalChanges(CFSTR("Carole"), CFSTR("TestSource"));
 183
 184     ok(SOSAccountAssertUserCredentialsAndUpdate(bob_account, cfaccount, cfpassword, &error), "Credential setting (%@)", error);
 185
 186     // Bob wins writing at this point, feed the changes back to alice.
 187     is(ProcessChangesUntilNoChange(changes, alice_account, bob_account, carole_account, NULL), 1, "updates");
 188
 189     ok(SOSAccountAssertUserCredentialsAndUpdate(alice_account, cfaccount, cfpassword, &error), "Credential setting (%@)", error);
 190     CFReleaseNull(error);
 191
 192     ok(SOSAccountAssertUserCredentialsAndUpdate(carole_account, cfaccount, cfpassword, &error), "Credential setting (%@)", error);
 193     CFReleaseNull(error);
 194     ok(SOSAccountResetToOffering_wTxn(alice_account, &error), "Reset to offering (%@)", error);
 195     CFReleaseNull(error);
 196
 197     is(ProcessChangesUntilNoChange(changes, alice_account, bob_account, carole_account, NULL), 2, "updates");
 198
 199     ok(SOSAccountJoinCircles_wTxn(bob_account, &error), "Bob Applies (%@)", error);
 200     CFReleaseNull(error);
 201     is(ProcessChangesUntilNoChange(changes, alice_account, bob_account, carole_account, NULL), 2, "updates");
 202
 203     {
 204         CFArrayRef applicants = SOSAccountCopyApplicants(alice_account, &error);
 205
 206         ok(applicants && CFArrayGetCount(applicants) == 1, "See one applicant %@ (%@)", applicants, error);
 207         ok(SOSAccountAcceptApplicants(alice_account, applicants, &error), "Alice accepts (%@)", error);
 208         CFReleaseNull(error);
 209         CFReleaseNull(applicants);
 210     }
 211
 212     is(ProcessChangesUntilNoChange(changes, alice_account, bob_account, carole_account, NULL), 3, "updates");
 213
 214     accounts_agree("bob&alice pair", bob_account, alice_account);
 215
 216
 217     ok(performiCloudIdentityAttack(carole_account, alice_account, bob_account, changes), "Attack is defeated");
 218
 219     CFReleaseNull(cfpassword);
 220     alice_account = nil;
 221     bob_account = nil;
 222     SOSTestCleanup();
 223 }
 224
 225 int secd_60_account_cloud_exposure(int argc, char *const *argv)
 226 {
 227     plan_tests(kTestTestCount);
 228
 229     secd_test_setup_temp_keychain(__FUNCTION__, NULL);
 230
 231     tests();
 232
 233     return 0;
 234 }