OSX/utilities/der_array.c

   1 /*
   2  * Copyright (c) 2012,2014 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/SecCFRelease.h"
  28 #include "utilities/der_plist.h"
  29 #include "utilities/der_plist_internal.h"
  30
  31 #include <corecrypto/ccder.h>
  32 #include <CoreFoundation/CoreFoundation.h>
  33
  34
  35 const uint8_t* der_decode_array(CFAllocatorRef allocator,
  36                                 CFArrayRef* array, CFErrorRef *error,
  37                                 const uint8_t* der, const uint8_t *der_end)
  38 {
  39     if (NULL == der) {
  40         SecCFDERCreateError(kSecDERErrorNullInput, CFSTR("null input"), NULL, error);
  41         return NULL;
  42     }
  43
  44     CFMutableArrayRef result = CFArrayCreateMutable(allocator, 0, &kCFTypeArrayCallBacks);
  45
  46     const uint8_t *elements_end;
  47     const uint8_t *current_element = ccder_decode_sequence_tl(&elements_end, der, der_end);
  48     if (!current_element) {
  49         SecCFDERCreateError(kSecDERErrorUnknownEncoding, CFSTR("tag/length decode failed"), NULL, error);
  50     }
  51
  52     while (current_element != NULL && current_element < elements_end) {
  53         CFPropertyListRef element = NULL;
  54         current_element = der_decode_plist(allocator, &element, error, current_element, elements_end);
  55         if (current_element) {
  56             CFArrayAppendValue(result, element);
  57             CFReleaseNull(element);
  58         }
  59     }
  60
  61     if (current_element) {
  62         *array = result;
  63         result = NULL;
  64     }
  65
  66     CFReleaseNull(result);
  67     return current_element;
  68 }
  69
  70
  71 size_t der_sizeof_array(CFArrayRef data, CFErrorRef *error)
  72 {
  73     size_t body_size = 0;
  74     for(CFIndex position = CFArrayGetCount(data) - 1;
  75         position >= 0;
  76         --position)
  77     {
  78         body_size += der_sizeof_plist(CFArrayGetValueAtIndex(data, position), error);
  79     }
  80     return ccder_sizeof(CCDER_CONSTRUCTED_SEQUENCE, body_size);
  81 }
  82
  83
  84 uint8_t* der_encode_array(CFArrayRef array, CFErrorRef *error,
  85                           const uint8_t *der, uint8_t *der_end)
  86 {
  87     uint8_t* original_der_end = der_end;
  88     for(CFIndex position = CFArrayGetCount(array) - 1;
  89         position >= 0;
  90         --position)
  91     {
  92         der_end = der_encode_plist(CFArrayGetValueAtIndex(array, position), error, der, der_end);
  93     }
  94
  95     return SecCCDEREncodeHandleResult(ccder_encode_constructed_tl(CCDER_CONSTRUCTED_SEQUENCE, original_der_end, der, der_end),
  96                                       error);
  97 }