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
35const uint8_t* der_decode_data_mutable(CFAllocatorRef allocator, CFOptionFlags mutability,
36                                       CFMutableDataRef* data, 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_OCTET_STRING, &payload_size, der, der_end);
44
45    if (NULL == payload || (der_end - payload) < payload_size) {
46        SecCFDERCreateError(kSecDERErrorUnknownEncoding, CFSTR("Unknown data encoding"), NULL, error);
47        return NULL;
48    }
49
50    *data = CFDataCreateMutable(allocator, 0);
51
52    if (NULL == *data) {
53        SecCFDERCreateError(kSecDERErrorAllocationFailure, CFSTR("Failed to create data"), NULL, error);
54        return NULL;
55    }
56
57    CFDataAppendBytes(*data, payload, payload_size);
58
59    return payload + payload_size;
60}
61
62
63const uint8_t* der_decode_data(CFAllocatorRef allocator, CFOptionFlags mutability,
64                               CFDataRef* data, CFErrorRef *error,
65                               const uint8_t* der, const uint8_t *der_end)
66{
67    if (NULL == der)
68        return NULL;
69
70    size_t payload_size = 0;
71    const uint8_t *payload = ccder_decode_tl(CCDER_OCTET_STRING, &payload_size, der, der_end);
72
73    if (NULL == payload || (der_end - payload) < payload_size) {
74        SecCFDERCreateError(kSecDERErrorUnknownEncoding, CFSTR("Unknown data encoding"), NULL, error);
75        return NULL;
76    }
77
78    *data = CFDataCreate(allocator, payload, payload_size);
79
80    if (NULL == *data) {
81        SecCFDERCreateError(kSecDERErrorAllocationFailure, CFSTR("Failed to create data"), NULL, error);
82        return NULL;
83    }
84
85    return payload + payload_size;
86}
87
88
89size_t der_sizeof_data(CFDataRef data, CFErrorRef *error)
90{
91    return ccder_sizeof_raw_octet_string(CFDataGetLength(data));
92}
93
94
95uint8_t* der_encode_data(CFDataRef data, CFErrorRef *error,
96                         const uint8_t *der, uint8_t *der_end)
97{
98    const CFIndex data_length = CFDataGetLength(data);
99
100    return ccder_encode_tl(CCDER_OCTET_STRING, data_length, der,
101           ccder_encode_body(data_length, CFDataGetBytePtr(data), der, der_end));
102
103}
104