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/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 35const uint8_t* der_decode_null(CFAllocatorRef allocator, CFOptionFlags mutability, 36 CFNullRef* nul, CFErrorRef *error, 37 const uint8_t* der, const uint8_t *der_end) 38{ 39 if (NULL == der) 40 return NULL; 41 42 size_t payload_size = 0; 43 const uint8_t *payload = ccder_decode_tl(CCDER_NULL, &payload_size, der, der_end); 44 45 if (NULL == payload || payload_size != 0) { 46 SecCFDERCreateError(kSecDERErrorUnknownEncoding, CFSTR("Unknown null encoding"), NULL, error); 47 return NULL; 48 } 49 50 *nul = kCFNull; 51 52 return payload + payload_size; 53} 54 55 56size_t der_sizeof_null(CFNullRef data __unused, CFErrorRef *error) 57{ 58 return ccder_sizeof(CCDER_NULL, 0); 59} 60 61 62uint8_t* der_encode_null(CFNullRef boolean __unused, CFErrorRef *error, 63 const uint8_t *der, uint8_t *der_end) 64{ 65 return ccder_encode_tl(CCDER_NULL, 0, der, der_end); 66} 67