keychain/otpaird/OTPairingClient.m

   1 #import <TargetConditionals.h>
   2
   3 #if TARGET_OS_WATCH
   4
   5 #import <Foundation/Foundation.h>
   6 #import <xpc/xpc.h>
   7 #import <os/log.h>
   8 #import <Security/SecXPCHelper.h>
   9
  10 #import "keychain/categories/NSError+UsefulConstructors.h"
  11
  12 #import "OTPairingClient.h"
  13 #import "OTPairingConstants.h"
  14
  15 void
  16 OTPairingInitiateWithCompletion(dispatch_queue_t queue, void (^completion)(bool success, NSError *))
  17 {
  18     xpc_connection_t connection;
  19     xpc_object_t message;
  20
  21     connection = xpc_connection_create_mach_service(OTPairingMachServiceName, NULL, XPC_CONNECTION_MACH_SERVICE_PRIVILEGED);
  22     xpc_connection_set_event_handler(connection, ^(__unused xpc_object_t event) {
  23     });
  24     xpc_connection_activate(connection);
  25
  26     message = xpc_dictionary_create(NULL, NULL, 0);
  27     xpc_dictionary_set_uint64(message, OTPairingXPCKeyOperation, OTPairingOperationInitiate);
  28
  29     xpc_connection_send_message_with_reply(connection, message, queue, ^(xpc_object_t reply) {
  30         if (xpc_get_type(reply) == XPC_TYPE_DICTIONARY) {
  31             bool success = xpc_dictionary_get_bool(reply, OTPairingXPCKeySuccess);
  32             size_t errlen = 0;
  33             const void *errptr = xpc_dictionary_get_data(reply, OTPairingXPCKeyError, &errlen);
  34             NSData *errordata;
  35             NSError *nserr = nil;
  36
  37             if (errptr != NULL) {
  38                 errordata = [NSData dataWithBytesNoCopy:(void *)errptr length:errlen freeWhenDone:NO];
  39                 nserr = [SecXPCHelper errorFromEncodedData:errordata];
  40             }
  41
  42             completion(success, nserr);
  43         } else if (reply == XPC_ERROR_CONNECTION_INVALID) {
  44             // This error is expected; otpaird is a NanoLaunchDaemon, only loaded when companion is paired.
  45             os_log(OS_LOG_DEFAULT, "otpaird connection invalid (daemon unloaded?)");
  46             completion(true, nil);
  47         } else {
  48             char *desc = NULL;
  49             NSDictionary *userInfo = nil;
  50
  51             desc = xpc_copy_description(reply);
  52             userInfo = @{ NSLocalizedDescriptionKey : [NSString stringWithUTF8String:desc] };
  53             free(desc);
  54
  55             completion(false, [NSError errorWithDomain:OTPairingErrorDomain code:OTPairingErrorTypeXPC userInfo:userInfo]);
  56         }
  57     });
  58 }
  59
  60 #endif /* TARGET_OS_WATCH */