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,
 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  
 25  #include <stdio.h>
 26  
 27  #include <utilities/SecXPCError.h>
 28  #include <utilities/SecCFError.h>
 29  #include <utilities/SecCFWrappers.h>
 30  #include <utilities/der_plist.h>
 31  
 32  CFStringRef sSecXPCErrorDomain = CFSTR("com.apple.security.xpc");
 33  
 34  static const char* kDomainKey = "domain";
 35  static const char* kCodeKey = "code";
 36  static const char* kUserInfoKey = "userinfo";
 37  
 38  CFErrorRef SecCreateCFErrorWithXPCObject(xpc_object_t xpc_error)
 39  {
 40      CFErrorRef result = NULL;
 41  
 42      if (xpc_get_type(xpc_error) == XPC_TYPE_DICTIONARY) {
 43          CFStringRef domain = NULL;
 44  
 45          const char * domain_string = xpc_dictionary_get_string(xpc_error, kDomainKey);
 46          if (domain_string != NULL) {
 47              domain = CFStringCreateWithCString(kCFAllocatorDefault, domain_string, kCFStringEncodingUTF8);
 48          } else {
 49              domain = sSecXPCErrorDomain;
 50              CFRetain(domain);
 51          }
 52          CFIndex code = (CFIndex) xpc_dictionary_get_int64(xpc_error, kCodeKey);
 53  
 54          CFTypeRef user_info = NULL;
 55          size_t size = 0;
 56          const uint8_t *der = xpc_dictionary_get_data(xpc_error, kUserInfoKey, &size);
 57          if (der) {
 58              const uint8_t *der_end = der + size;
 59              der = der_decode_plist(kCFAllocatorDefault,
 60                                     &user_info, NULL, der, der_end);
 61              if (der != der_end)
 62                  CFReleaseNull(user_info);
 63          }
 64  
 65          result = CFErrorCreate(NULL, domain, code, user_info);
 66  
 67          CFReleaseSafe(user_info);
 68          CFReleaseSafe(domain);
 69      } else {
 70          SecCFCreateErrorWithFormat(kSecXPCErrorUnexpectedType, sSecXPCErrorDomain, NULL, &result, NULL, CFSTR("Remote error not dictionary!: %@"), xpc_error);
 71      }
 72      return result;
 73  }
 74  
 75  static void SecXPCDictionarySetCFString(xpc_object_t dict, const char *key, CFStringRef string)
 76  {
 77      CFStringPerformWithCString(string, ^(const char *utf8Str) {
 78          xpc_dictionary_set_string(dict, key, utf8Str);
 79      });
 80  }
 81  
 82  xpc_object_t SecCreateXPCObjectWithCFError(CFErrorRef error)
 83  {
 84      xpc_object_t error_xpc = xpc_dictionary_create(NULL, NULL, 0);
 85  
 86      SecXPCDictionarySetCFString(error_xpc, kDomainKey, CFErrorGetDomain(error));
 87      xpc_dictionary_set_int64(error_xpc, kCodeKey, CFErrorGetCode(error));
 88  
 89      CFDictionaryRef user_info = CFErrorCopyUserInfo(error);
 90      size_t size = der_sizeof_plist(user_info, NULL);
 91      if (size) {
 92          uint8_t *der = malloc(size);
 93          uint8_t *der_end = der + size;
 94          uint8_t *der_start = der_encode_plist(user_info, NULL, der, der_end);
 95          if (der_start) {
 96              assert(der == der_start);
 97              xpc_dictionary_set_data(error_xpc, kUserInfoKey, der_start, der_end - der_start);
 98          }
 99          free(der);
100      }
101      CFRelease(user_info);
102  
103      return error_xpc;
104  }