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

   1 /*
   2  * Copyright (c) 2013-2014 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,
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  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 //  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
  43 #include <stdlib.h>
  44 #include <unistd.h>
  45
  46 #include "secd_regressions.h"
  47 #include "SOSTestDataSource.h"
  48
  49 #include "SOSRegressionUtilities.h"
  50 #include <utilities/SecCFWrappers.h>
  51 #include <Security/SecKeyPriv.h>
  52
  53 #include <securityd/SOSCloudCircleServer.h>
  54
  55 #include "SOSAccountTesting.h"
  56
  57 #include "SecdTestKeychainUtilities.h"
  58
  59 static int kTestTestCount = 58;
  60
  61 static bool SOSAccountAddiCloudIdentity(SOSAccountRef account, SOSCircleRef circle, SecKeyRef user_key, CFErrorRef *error) {
  62     bool result = false;
  63     SOSFullPeerInfoRef cloud_identity = NULL;
  64     SOSPeerInfoRef cloud_peer = GenerateNewCloudIdentityPeerInfo(error);
  65     require_quiet(cloud_peer, err_out);
  66     cloud_identity = CopyCloudKeychainIdentity(cloud_peer, error);
  67     CFReleaseNull(cloud_peer);
  68     require_quiet(cloud_identity, err_out);
  69     require_quiet(SOSCircleRequestAdmission(circle, user_key, cloud_identity, error), err_out);
  70     require_quiet(SOSCircleAcceptRequest(circle, user_key, account->my_identity, SOSFullPeerInfoGetPeerInfo(cloud_identity), error), err_out);
  71     result = true;
  72 err_out:
  73     return result;
  74 }
  75
  76 static bool SOSAccountResetCircleToNastyOffering(SOSAccountRef account, SecKeyRef userPriv, SOSPeerInfoRef pi, CFErrorRef *error) {
  77     bool result = false;
  78     SecKeyRef userPub = SecKeyCreatePublicFromPrivate(userPriv);
  79
  80     require(SOSAccountHasCircle(account, error), fail);
  81     require(SOSAccountEnsureFullPeerAvailable(account, error), fail);
  82
  83     // Save for reclaming
  84     //mygestalt = CFDictionaryCreateCopy(kCFAllocatorDefault, SOSPeerGetGestalt(SOSFullPeerInfoGetPeerInfo(account->my_identity)));
  85
  86     (void) SOSAccountResetAllRings(account, error);
  87
  88     SOSAccountModifyCircle(account, error, ^(SOSCircleRef circle) {
  89         bool result = false;
  90         CFErrorRef localError = NULL;
  91         SOSFullPeerInfoRef iCloudfpi = NULL;
  92
  93         //sleep(10);
  94         require_quiet(SOSCircleResetToEmpty(circle, error), err_out);
  95         require_quiet(SOSAccountAddiCloudIdentity(account, circle, userPriv, error), err_out);
  96         require_quiet(iCloudfpi = SOSCircleCopyiCloudFullPeerInfoRef(circle, error), err_out);
  97
  98         /* Add the defenders peerInfo to circle */
  99         require_quiet(SOSCircleRequestReadmission(circle, userPub, pi, error), err_out);
 100         require_quiet(SOSCircleAcceptRequest(circle, userPriv, iCloudfpi, pi, error), err_out);
 101
 102         account->departure_code = kSOSNeverLeftCircle;
 103
 104         result = true;
 105         account->trusted_circle = SOSCircleCopyCircle(kCFAllocatorDefault, circle, error);
 106         SOSAccountPublishCloudParameters(account, NULL);
 107         account->my_identity = NULL;
 108
 109     err_out:
 110         if (result == false)
 111         secerror("error resetting circle (%@) to offering: %@", circle, localError);
 112         if (localError && error && *error == NULL) {
 113             *error = localError;
 114             localError = NULL;
 115         }
 116         CFReleaseNull(localError);
 117         return result;
 118     });
 119
 120     result = true;
 121
 122 fail:
 123     return result;
 124 }
 125
 126 static bool SOSAccountResetToNastyOffering(SOSAccountRef account, SOSPeerInfoRef pi, CFErrorRef* error) {
 127     SecKeyRef user_key = SOSAccountGetPrivateCredential(account, error);
 128     if (!user_key)
 129         return false;
 130
 131     CFReleaseNull(account->my_identity);
 132
 133     return user_key && SOSAccountResetCircleToNastyOffering(account, user_key, pi, error);
 134 }
 135
 136 static bool performiCloudIdentityAttack(SOSAccountRef attacker, SOSAccountRef defender, SOSAccountRef accomplice, CFMutableDictionaryRef changes) {
 137     CFErrorRef error = NULL;
 138     bool retval = false;  // false means the attack succeeds
 139     CFArrayRef applicants = NULL;
 140
 141     /*----- Carole makes bogus circle with fake iCloud identity and Alice's peerInfo but only signed with fake iCloud identity -----*/
 142
 143     require_action_quiet(SOSAccountResetToNastyOffering(attacker, SOSFullPeerInfoGetPeerInfo(defender->my_identity), &error), testDone, retval = true);
 144     CFReleaseNull(error);
 145
 146     ProcessChangesUntilNoChange(changes, defender, accomplice, attacker, NULL);
 147
 148     /*----- Now use our fake iCloud identity to get in to the circle for real -----*/
 149     require_action_quiet(SOSAccountJoinCirclesAfterRestore(attacker, &error), testDone, retval = true);
 150     CFReleaseNull(error);
 151     require_action_quiet(countPeers(attacker) == 2, testDone, retval = true);
 152
 153     /*----- Let's see if carole can get bob into the circle and have alice believe it -----*/
 154     require_action_quiet(SOSAccountJoinCircles(accomplice, &error), testDone, retval = true);
 155     CFReleaseNull(error);
 156
 157     ProcessChangesUntilNoChange(changes, defender, accomplice, attacker, NULL);
 158
 159     applicants = SOSAccountCopyApplicants(attacker, &error);
 160     CFReleaseNull(error);
 161
 162     if(CFArrayGetCount(applicants) > 0) {
 163         require_action_quiet(SOSAccountAcceptApplicants(attacker, applicants, &error), testDone, retval = true);
 164     }
 165
 166     ProcessChangesUntilNoChange(changes, defender, accomplice, attacker, NULL);
 167
 168     require_action_quiet(countPeers(defender) == 3, testDone, retval = true);
 169     require_action_quiet(countPeers(accomplice) == 3, testDone, retval = true);
 170     require_action_quiet(countPeers(attacker) == 3, testDone, retval = true);
 171
 172 testDone:
 173     CFReleaseNull(applicants);
 174     CFReleaseNull(error);
 175     return retval;
 176 }
 177
 178 static void tests(void)
 179 {
 180     CFErrorRef error = NULL;
 181     CFDataRef cfpassword = CFDataCreate(NULL, (uint8_t *) "FooFooFoo", 10);
 182     CFStringRef cfaccount = CFSTR("test@test.org");
 183
 184     CFMutableDictionaryRef changes = CFDictionaryCreateMutableForCFTypes(kCFAllocatorDefault);
 185
 186     SOSAccountRef alice_account = CreateAccountForLocalChanges( CFSTR("Alice"), CFSTR("TestSource"));
 187     SOSAccountRef bob_account = CreateAccountForLocalChanges(CFSTR("Bob"), CFSTR("TestSource"));
 188     SOSAccountRef carole_account = CreateAccountForLocalChanges(CFSTR("Carole"), CFSTR("TestSource"));
 189
 190     ok(SOSAccountAssertUserCredentialsAndUpdate(bob_account, cfaccount, cfpassword, &error), "Credential setting (%@)", error);
 191
 192     // Bob wins writing at this point, feed the changes back to alice.
 193     is(ProcessChangesUntilNoChange(changes, alice_account, bob_account, carole_account, NULL), 1, "updates");
 194
 195     ok(SOSAccountAssertUserCredentialsAndUpdate(alice_account, cfaccount, cfpassword, &error), "Credential setting (%@)", error);
 196     CFReleaseNull(error);
 197
 198     ok(SOSAccountAssertUserCredentialsAndUpdate(carole_account, cfaccount, cfpassword, &error), "Credential setting (%@)", error);
 199     CFReleaseNull(error);
 200     ok(SOSAccountResetToOffering(alice_account, &error), "Reset to offering (%@)", error);
 201     CFReleaseNull(error);
 202
 203     is(ProcessChangesUntilNoChange(changes, alice_account, bob_account, carole_account, NULL), 2, "updates");
 204
 205     ok(SOSAccountJoinCircles(bob_account, &error), "Bob Applies (%@)", error);
 206     CFReleaseNull(error);
 207     is(ProcessChangesUntilNoChange(changes, alice_account, bob_account, carole_account, NULL), 2, "updates");
 208
 209     {
 210         CFArrayRef applicants = SOSAccountCopyApplicants(alice_account, &error);
 211
 212         ok(applicants && CFArrayGetCount(applicants) == 1, "See one applicant %@ (%@)", applicants, error);
 213         ok(SOSAccountAcceptApplicants(alice_account, applicants, &error), "Alice accepts (%@)", error);
 214         CFReleaseNull(error);
 215         CFReleaseNull(applicants);
 216     }
 217
 218     is(ProcessChangesUntilNoChange(changes, alice_account, bob_account, carole_account, NULL), 3, "updates");
 219
 220     accounts_agree("bob&alice pair", bob_account, alice_account);
 221
 222
 223     ok(performiCloudIdentityAttack(carole_account, alice_account, bob_account, changes), "Attack is defeated");
 224
 225     CFReleaseNull(bob_account);
 226     CFReleaseNull(alice_account);
 227     CFReleaseNull(carole_account);
 228     CFReleaseNull(cfpassword);
 229
 230     SOSUnregisterAllTransportMessages();
 231     SOSUnregisterAllTransportCircles();
 232     SOSUnregisterAllTransportKeyParameters();
 233     CFArrayRemoveAllValues(key_transports);
 234     CFArrayRemoveAllValues(circle_transports);
 235     CFArrayRemoveAllValues(message_transports);
 236
 237 }
 238
 239 int secd_60_account_cloud_exposure(int argc, char *const *argv)
 240 {
 241     plan_tests(kTestTestCount);
 242
 243     secd_test_setup_temp_keychain(__FUNCTION__, NULL);
 244
 245     tests();
 246
 247     return 0;
 248 }