keychain/ot/OctagonControlServer.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 #import <Foundation/NSXPCConnection_Private.h>
  26
  27 #import <utilities/debugging.h>
  28 #import "SecEntitlements.h"
  29 #import "keychain/ot/OctagonControlServer.h"
  30 #import "keychain/ot/OTManager.h"
  31 #import "keychain/ot/OT.h"
  32
  33 @interface OctagonControlServer : NSObject <NSXPCListenerDelegate>
  34 @end
  35
  36 @implementation OctagonControlServer
  37
  38 - (BOOL)listener:(__unused NSXPCListener *)listener shouldAcceptNewConnection:(NSXPCConnection *)newConnection
  39 {
  40 #if OCTAGON
  41     NSNumber *num = [newConnection valueForEntitlement:kSecEntitlementPrivateOctagon];
  42     if (![num isKindOfClass:[NSNumber class]] || ![num boolValue]) {
  43         secerror("octagon: Client pid: %d doesn't have entitlement: %@",
  44                  [newConnection processIdentifier], kSecEntitlementPrivateOctagon);
  45         return NO;
  46     }
  47     // In the future, we should consider vending a proxy object that can return a nicer error.
  48     if (!SecOTIsEnabled()) {
  49         secerror("Octagon: Client pid: %d attempted to use Octagon, but Octagon is not enabled.",
  50                  newConnection.processIdentifier);
  51         return NO;
  52     }
  53
  54     secnotice("octagon", "received connection from client pid %d", [newConnection processIdentifier]);
  55     newConnection.exportedInterface = OTSetupControlProtocol([NSXPCInterface interfaceWithProtocol:@protocol(OTControlProtocol)]);
  56     newConnection.exportedObject = [OTManager manager];
  57
  58     [newConnection resume];
  59
  60     return YES;
  61 #else // OCTAGON
  62     secerror("octagon does not exist on this platform");
  63     return NO;
  64 #endif // OCTAGON
  65 }
  66 @end
  67
  68 void
  69 OctagonControlServerInitialize(void)
  70 {
  71     static dispatch_once_t once;
  72     static OctagonControlServer *server;
  73     static NSXPCListener *listener;
  74
  75     dispatch_once(&once, ^{
  76         @autoreleasepool {
  77             server = [OctagonControlServer new];
  78
  79             listener = [[NSXPCListener alloc] initWithMachServiceName:@(kSecuritydOctagonServiceName)];
  80             listener.delegate = server;
  81             [listener resume];
  82         }
  83     });
  84 }