keychain/ckks/CKKSControlProtocol.m

   1 /*
   2  * Copyright (c) 2017 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 #import <Foundation/Foundation.h>
  25
  26 #import "keychain/ckks/CKKSControlProtocol.h"
  27
  28 #if OCTAGON
  29 #import <CloudKit/CloudKit.h>
  30 #import <CloudKit/CloudKit_Private.h>
  31 #import <objc/runtime.h>
  32 #import "utilities/debugging.h"
  33 #include <dlfcn.h>
  34 #import <Security/SecXPCHelper.h>
  35
  36 // Weak-link CloudKit, until we can get ckksctl out of base system
  37 static void *cloudKit = NULL;
  38
  39 static void
  40 initCloudKit(void)
  41 {
  42     static dispatch_once_t onceToken;
  43     dispatch_once(&onceToken, ^{
  44         cloudKit = dlopen("/System/Library/Frameworks/CloudKit.framework/CloudKit", RTLD_LAZY);
  45     });
  46 }
  47
  48 static void
  49 getCloudKitSymbol(void **sym, const char *name)
  50 {
  51     initCloudKit();
  52     if (!sym || *sym) {
  53         return;
  54     }
  55     *sym = dlsym(cloudKit, name);
  56     if (*sym == NULL) {
  57         fprintf(stderr, "symbol %s is missing", name);
  58         abort();
  59     }
  60 }
  61 #endif // OCTAGON
  62
  63 NSXPCInterface* CKKSSetupControlProtocol(NSXPCInterface* interface) {
  64 #if OCTAGON
  65     static NSMutableSet *errClasses;
  66
  67     static dispatch_once_t onceToken;
  68     dispatch_once(&onceToken, ^{
  69         __typeof(CKAcceptableValueClasses) *soft_CKAcceptableValueClasses = NULL;
  70         getCloudKitSymbol((void **)&soft_CKAcceptableValueClasses, "CKAcceptableValueClasses");
  71         errClasses = [NSMutableSet setWithSet:soft_CKAcceptableValueClasses()];
  72         [errClasses unionSet:[SecXPCHelper safeErrorClasses]];
  73     });
  74
  75     @try {
  76         [interface setClasses:errClasses forSelector:@selector(rpcResetLocal:reply:)                   argumentIndex:0 ofReply:YES];
  77         [interface setClasses:errClasses forSelector:@selector(rpcResetCloudKit:reason:reply:)         argumentIndex:0 ofReply:YES];
  78         [interface setClasses:errClasses forSelector:@selector(rpcResync:reply:)                       argumentIndex:0 ofReply:YES];
  79         [interface setClasses:errClasses forSelector:@selector(rpcResyncLocal:reply:)                  argumentIndex:0 ofReply:YES];
  80         [interface setClasses:errClasses forSelector:@selector(rpcStatus:reply:)                       argumentIndex:1 ofReply:YES];
  81         [interface setClasses:errClasses forSelector:@selector(rpcFastStatus:reply:)                   argumentIndex:1 ofReply:YES];
  82         [interface setClasses:errClasses forSelector:@selector(rpcFetchAndProcessChanges:reply:)       argumentIndex:0 ofReply:YES];
  83         [interface setClasses:errClasses forSelector:@selector(rpcFetchAndProcessClassAChanges:reply:) argumentIndex:0 ofReply:YES];
  84         [interface setClasses:errClasses forSelector:@selector(rpcPushOutgoingChanges:reply:)          argumentIndex:0 ofReply:YES];
  85         [interface setClasses:errClasses forSelector:@selector(rpcGetCKDeviceIDWithReply:)             argumentIndex:0 ofReply:YES];
  86         [interface setClasses:errClasses forSelector:@selector(rpcCKMetric:attributes:reply:)          argumentIndex:0 ofReply:YES];
  87     }
  88
  89     @catch(NSException* e) {
  90         secerror("CKKSSetupControlProtocol failed, continuing, but you might crash later: %@", e);
  91         @throw e;
  92     }
  93 #endif
  94
  95     return interface;
  96 }
  97