OSX/utilities/src/SecXPCError.c

   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, kCFPropertyListImmutable,
  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 }