SecurityTool/sharedTool/policy_dryrun.m

   1 #import <CloudKit/CKContainer_Private.h>
   2 #import <CloudKit/CloudKit.h>
   3 #import <CoreFoundation/CFPriv.h>
   4 #import <Foundation/Foundation.h>
   5 #import <Foundation/NSURLSession.h>
   6 #import <dispatch/dispatch.h>
   7 #import <os/variant_private.h>
   8
   9 #include "policy_dryrun.h"
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <unistd.h>
  15 #include <Security/SecItem.h>
  16 #include <Security/SecItemPriv.h>
  17 #include <Security/Security.h>
  18 #include <keychain/SecureObjectSync/SOSCloudCircle.h>
  19 #include <keychain/SecureObjectSync/SOSViews.h>
  20 #import "TrustedPeers/TrustedPeers.h"
  21
  22 #include "tool_errors.h"
  23
  24 // Depends on a modern enough TrustedPeers framework.
  25 // If the machine doesn't have one installed, set DYLD_FRAMEWORK_PATH
  26
  27 // Stolen from keychain/SecureObjectSync/SOSEngine.c
  28
  29 static NSString* getSOSView(id object, NSString* itemClass) {
  30     if (![object isKindOfClass:[NSDictionary class]]) {
  31         return nil;
  32     }
  33
  34     NSString *viewHint = object[(NSString*)kSecAttrSyncViewHint];
  35     if (viewHint != nil) {
  36         return viewHint;
  37     } else {
  38         NSString *ag = object[(NSString*)kSecAttrAccessGroup];
  39
  40         if ([itemClass isEqualToString: (NSString*)kSecClassKey] && [ag isEqualToString: @"com.apple.security.sos"]) {
  41             return (NSString*)kSOSViewiCloudIdentity;
  42         } else if ([ag isEqualToString: @"com.apple.cfnetwork"]) {
  43             return (NSString*)kSOSViewAutofillPasswords;
  44         } else if ([ag isEqualToString: @"com.apple.safari.credit-cards"]) {
  45             return (NSString*)kSOSViewSafariCreditCards;
  46         } else if ([itemClass isEqualToString: (NSString*)kSecClassGenericPassword]) {
  47             if ([ag isEqualToString: @"apple"] &&
  48                 [object[(NSString*)kSecAttrService] isEqualToString: @"AirPort"]) {
  49                 return (NSString*)kSOSViewWiFi;
  50             } else if ([ag isEqualToString: @"com.apple.sbd"]) {
  51                 return (NSString*)kSOSViewBackupBagV0;
  52             } else {
  53                 return (NSString*)kSOSViewOtherSyncable; // (genp)
  54             }
  55         } else {
  56             return (NSString*)kSOSViewOtherSyncable; // (inet || keys)
  57         }
  58     }
  59 }
  60
  61 static inline NSNumber *now_msecs() {
  62     return @(((long)[[NSDate date] timeIntervalSince1970] * 1000));
  63 }
  64
  65 static NSString* cloudKitDeviceID() {
  66   __block NSString* ret = nil;
  67
  68   if (!os_variant_has_internal_diagnostics("com.apple.security")) {
  69     return nil;
  70   }
  71   CKContainer *container = [CKContainer containerWithIdentifier:@"com.apple.security.keychain"];
  72   dispatch_semaphore_t sem = dispatch_semaphore_create(0);
  73   [container fetchCurrentDeviceIDWithCompletionHandler:^(NSString* deviceID, NSError* error) {
  74       if (error != nil) {
  75         NSLog(@"failed to fetch CK deviceID: %@", error);
  76       } else {
  77         ret = deviceID;
  78       }
  79       dispatch_semaphore_signal(sem);
  80     }];
  81   dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);
  82   return ret;
  83 }
  84
  85 static void reportStats(unsigned expected_mismatches, unsigned real_mismatches, NSArray<NSDictionary*>* reportedMismatches) {
  86     NSError *error = nil;
  87     NSURLSessionConfiguration *defaultConfiguration = [NSURLSessionConfiguration ephemeralSessionConfiguration];
  88     NSURLSession *session = [NSURLSession sessionWithConfiguration:defaultConfiguration];
  89     NSURL *endpoint = [NSURL URLWithString:@"https://xp.apple.com/report/2/xp_sear_keysync"];
  90     NSMutableURLRequest *req = [[NSMutableURLRequest alloc] init];
  91     req.URL = endpoint;
  92     req.HTTPMethod = @"POST";
  93     NSMutableDictionary *dict = [@{
  94         @"expectedMismatches": @(expected_mismatches),
  95         @"realMismatches": @(real_mismatches),
  96         @"eventTime": now_msecs(),
  97         @"topic": @"xp_sear_keysync",
  98         @"eventType": @"policy-dryrun",
  99     } mutableCopy];
 100     NSDictionary *version = CFBridgingRelease(_CFCopySystemVersionDictionary());
 101     NSString *build = version[(__bridge NSString *)_kCFSystemVersionBuildVersionKey];
 102     if (build != nil) {
 103       dict[@"build"] = build;
 104     } else {
 105       NSLog(@"Unable to find out build version");
 106     }
 107     NSString *product = version[(__bridge NSString *)_kCFSystemVersionProductNameKey];
 108     if (product != nil) {
 109       dict[@"product"] = product;
 110     } else {
 111       NSLog(@"Unable to find out build product");
 112     }
 113     NSString* ckDeviceID = cloudKitDeviceID();
 114     if (ckDeviceID) {
 115       dict[@"SFAnalyticsDeviceID"] = ckDeviceID;
 116     } else {
 117       NSLog(@"Unable to fetch CK device ID");
 118     }
 119
 120     dict[@"mismatches"] = reportedMismatches;
 121
 122     NSArray<NSDictionary*>* events = @[dict];
 123     NSDictionary *wrapper = @{
 124                               @"postTime": @([[NSDate date] timeIntervalSince1970] * 1000),
 125                               @"events": events,
 126     };
 127     NSData* data = [NSJSONSerialization dataWithJSONObject:wrapper options:0 error:&error];
 128     if (data == nil || error != nil) {
 129         NSLog(@"failed to encode data: %@", error);
 130         return;
 131     }
 132     NSLog(@"logging %@, %@", wrapper, data);
 133     req.HTTPBody = data;
 134     dispatch_semaphore_t sem = dispatch_semaphore_create(0);
 135     NSURLSessionDataTask *task = [session dataTaskWithRequest:req completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
 136             if (error != nil) {
 137                 NSLog(@"splunk upload failed: %@", error);
 138                 return;
 139             }
 140             NSHTTPURLResponse *httpResp = (NSHTTPURLResponse*)response;
 141             if (httpResp.statusCode != 200) {
 142                 NSLog(@"HTTP Post error: %@", httpResp);
 143             }
 144             NSLog(@"%@", httpResp);
 145             if (data != nil) {
 146               size_t length = [data length];
 147               char *buf = malloc(length);
 148               [data getBytes:buf length:length];
 149               NSLog(@"%.*s", (int)length, buf);
 150               free(buf);
 151             }
 152             dispatch_semaphore_signal(sem);
 153         }];
 154     [task resume];
 155     dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);
 156 }
 157
 158 int policy_dryrun(int argc, char * const *argv) {
 159     @autoreleasepool {
 160         NSError* error = nil;
 161         // From Swift.policy, policy v5
 162
 163         TPPolicyDocument *tpd = [TPPolicyDocument policyDocWithHash:@"SHA256:O/ECQlWhvNlLmlDNh2+nal/yekUC87bXpV3k+6kznSo="
 164                                                   data:[[NSData alloc] initWithBase64EncodedString:
 165                                                                            @"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" options:0]];
 166         TPPolicy *policy = [tpd policyWithSecrets:@{} decrypter:nil error:&error];
 167         if (error != nil) {
 168             NSLog(@"policy error: %@", error);
 169             return 1;
 170         }
 171         if (policy == nil) {
 172             NSLog(@"policy is nil");
 173             return 1;
 174         }
 175         unsigned real_mismatches = 0;
 176         unsigned expected_mismatches = 0;
 177         NSMutableArray<NSDictionary*>* reportedMismatches = [[NSMutableArray<NSDictionary*> alloc] init];
 178
 179         NSArray<NSString*>* keychainClasses = @[(id)kSecClassInternetPassword,
 180                                                 (id)kSecClassGenericPassword,
 181                                                 (id)kSecClassKey,
 182                                                 (id)kSecClassCertificate];
 183
 184         for(NSString* itemClass in keychainClasses) {
 185             NSLog(@"itemClass: %@", itemClass);
 186             NSDictionary *query = @{ (id)kSecMatchLimit : (id)kSecMatchLimitAll,
 187                                      (id)kSecClass : (id)itemClass,
 188                                      (id)kSecReturnAttributes : @YES,
 189                                      (id)kSecAttrSynchronizable: @YES,
 190                                      (id)kSecUseDataProtectionKeychain: @YES,
 191                                      (id)kSecUseAuthenticationUI : (id)kSecUseAuthenticationUISkip,
 192                                      };
 193
 194             NSArray *result;
 195
 196             OSStatus status = SecItemCopyMatching((CFDictionaryRef)query, (void*)&result);
 197             if (status) {
 198                 if (status == errSecItemNotFound) {
 199                     NSLog(@"no items found matching: %@", query);
 200                     continue;
 201                 } else {
 202                     NSLog(@"SecItemCopyMatching(%@) failed: %d", query, (int)status);
 203                     return status;
 204                 }
 205             }
 206
 207             if (![result isKindOfClass:[NSArray class]]) {
 208                 NSLog(@"expected NSArray result from SecItemCopyMatching");
 209                 return -1;
 210             }
 211
 212             for (id a in result) {
 213                 NSLog(@"%@", a);
 214                 NSString *oldView = getSOSView(a, itemClass);
 215                 if (oldView != nil) {
 216                     NSLog(@"old: %@", oldView);
 217                 }
 218
 219                 NSMutableDictionary* mutA = [a mutableCopy];
 220                 mutA[(id)kSecClass] = (id)itemClass;
 221
 222                 NSString* newView = [policy mapKeyToView:mutA];
 223                 if (newView != nil) {
 224                     NSLog(@"new: %@", newView);
 225                 }
 226                 if(oldView == nil ^ newView == nil) {
 227                     NSLog(@"real mismatch: old view (%@) != new view (%@)", oldView, newView);
 228                     ++real_mismatches;
 229                     [reportedMismatches addObject: a];
 230
 231                 } else if (oldView && newView && ![oldView isEqualToString: newView]) {
 232                     if ([oldView hasPrefix:@"PCS-"] && [newView isEqualToString: @"ProtectedCloudStorage"]) {
 233                         NSLog(@"(expected PCS mismatch): old view (%@) != new view (%@)", oldView, newView);
 234                         ++expected_mismatches;
 235
 236                     } else if([oldView isEqualToString:@"OtherSyncable"] && [newView isEqualToString: @"Applications"]) {
 237                         NSLog(@"(expected 3rd party mismatch): old view (%@) != new view (%@)", oldView, newView);
 238                         ++expected_mismatches;
 239
 240                     } else if([oldView isEqualToString:@"OtherSyncable"] && [newView isEqualToString: @"Backstop"]) {
 241                         NSLog(@"(expected backstop mismatch): old view (%@) != new view (%@)", oldView, newView);
 242                         ++expected_mismatches;
 243
 244                     } else if([newView isEqualToString:@"NotSynced"]) {
 245                         NSLog(@"(expected NotSynced mismatch): old view (%@) != new view (%@)", oldView, newView);
 246                         ++expected_mismatches;
 247
 248                     } else if(([oldView isEqualToString:@"BackupBagV0"] || [oldView isEqualToString:@"iCloudIdentity"]) && [newView isEqualToString:@"SecureObjectSync"]) {
 249                         NSLog(@"(expected BackupBag - SecureObjectSync mismatch): old view (%@) != new view (%@)", oldView, newView);
 250                         ++expected_mismatches;
 251
 252                     } else if(([oldView isEqualToString:@"AccessoryPairing"]
 253                                || [oldView isEqualToString:@"NanoRegistry"]
 254                                || [oldView isEqualToString:@"WatchMigration"]) && [newView isEqualToString:@"DevicePairing"]) {
 255                         NSLog(@"(expected DevicePairing mismatch): old view (%@) != new view (%@)", oldView, newView);
 256                         ++expected_mismatches;
 257
 258                     } else {
 259                         NSLog(@"real mismatch: old view (%@) != new view (%@)", oldView, newView);
 260                         ++real_mismatches;
 261                         [reportedMismatches addObject: a];
 262                     }
 263                 }
 264             }
 265         }
 266
 267         NSLog(@"%d expected_mismatches", expected_mismatches);
 268         NSLog(@"%d real_mismatches", real_mismatches);
 269         reportStats(expected_mismatches, real_mismatches, reportedMismatches);
 270     }
 271     return 0;
 272 }