OSX/utilities/src/der_plist.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 // der..CFPropertyList
  36 //
  37 // We support:
  38 //
  39 //   CFBoolean
  40 //   CFData
  41 //   CFDate
  42 //   CFString
  43 //   CFNumber
  44 //   CFNull
  45 //
  46 //   CFArray
  47 //   CFDictionary
  48 //
  49 //
  50
  51 const uint8_t* der_decode_plist(CFAllocatorRef allocator, CFOptionFlags mutability,
  52                                 CFPropertyListRef* pl, CFErrorRef *error,
  53                                 const uint8_t* der, const uint8_t *der_end)
  54 {    if (NULL == der)
  55     return NULL;
  56
  57     ccder_tag tag;
  58     if (NULL == ccder_decode_tag(&tag, der, der_end))
  59         return NULL;
  60
  61     switch (tag) {
  62                 case CCDER_NULL:
  63                         return der_decode_null(allocator, mutability, (CFNullRef*)pl, error, der, der_end);
  64         case CCDER_BOOLEAN:
  65             return der_decode_boolean(allocator, mutability, (CFBooleanRef*)pl, error, der, der_end);
  66         case CCDER_OCTET_STRING:
  67             return der_decode_data(allocator, mutability, (CFDataRef*)pl, error, der, der_end);
  68         case CCDER_GENERALIZED_TIME:
  69             return der_decode_date(allocator, mutability, (CFDateRef*)pl, error, der, der_end);
  70         case CCDER_CONSTRUCTED_SEQUENCE:
  71             return der_decode_array(allocator, mutability, (CFArrayRef*)pl, error, der, der_end);
  72         case CCDER_UTF8_STRING:
  73             return der_decode_string(allocator, mutability, (CFStringRef*)pl, error, der, der_end);
  74         case CCDER_INTEGER:
  75             return der_decode_number(allocator, mutability, (CFNumberRef*)pl, error, der, der_end);
  76         case CCDER_CONSTRUCTED_SET:
  77             return der_decode_dictionary(allocator, mutability, (CFDictionaryRef*)pl, error, der, der_end);
  78         case CCDER_CONSTRUCTED_CFSET:
  79             return der_decode_set(allocator, mutability, (CFSetRef*)pl, error, der, der_end);
  80         default:
  81             SecCFDERCreateError(kSecDERErrorUnsupportedDERType, CFSTR("Unsupported DER Type"), NULL, error);
  82             return NULL;
  83     }
  84 }
  85
  86
  87 size_t der_sizeof_plist(CFPropertyListRef pl, CFErrorRef *error)
  88 {
  89     if (!pl) {
  90         SecCFDERCreateError(kSecDERErrorUnsupportedCFObject, CFSTR("Null CFType"), NULL, error);
  91         return 0;
  92     }
  93
  94     CFTypeID  dataType = CFGetTypeID(pl);
  95
  96     if (CFArrayGetTypeID() == dataType)
  97         return der_sizeof_array((CFArrayRef) pl, error);
  98     else if (CFBooleanGetTypeID() == dataType)
  99         return der_sizeof_boolean((CFBooleanRef) pl, error);
 100     else if (CFDataGetTypeID() == dataType)
 101         return der_sizeof_data((CFDataRef) pl, error);
 102     else if (CFDateGetTypeID() == dataType)
 103         return der_sizeof_date((CFDateRef) pl, error);
 104     else if (CFDictionaryGetTypeID() == dataType)
 105         return der_sizeof_dictionary((CFDictionaryRef) pl, error);
 106     else if (CFSetGetTypeID() == dataType)
 107         return der_sizeof_set((CFSetRef) pl, error);
 108     else if (CFStringGetTypeID() == dataType)
 109         return der_sizeof_string((CFStringRef) pl, error);
 110     else if (CFNumberGetTypeID() == dataType)
 111         return der_sizeof_number((CFNumberRef) pl, error);
 112         if (CFNullGetTypeID() == dataType)
 113                 return der_sizeof_null((CFNullRef) pl, error);
 114         else {
 115         SecCFDERCreateError(kSecDERErrorUnsupportedCFObject, CFSTR("Unsupported CFType"), NULL, error);
 116         return 0;
 117     }
 118 }
 119
 120
 121 uint8_t* der_encode_plist(CFPropertyListRef pl, CFErrorRef *error,
 122                           const uint8_t *der, uint8_t *der_end)
 123 {
 124     if (!pl) {
 125         SecCFDERCreateError(kSecDERErrorUnsupportedCFObject, CFSTR("Null CFType"), NULL, error);
 126         return NULL;
 127     }
 128
 129     CFTypeID  dataType = CFGetTypeID(pl);
 130
 131     if (CFArrayGetTypeID() == dataType)
 132         return der_encode_array((CFArrayRef) pl, error, der, der_end);
 133     else if (CFBooleanGetTypeID() == dataType)
 134         return der_encode_boolean((CFBooleanRef) pl, error, der, der_end);
 135     else if (CFDataGetTypeID() == dataType)
 136         return der_encode_data((CFDataRef) pl, error, der, der_end);
 137     else if (CFDateGetTypeID() == dataType)
 138         return der_encode_date((CFDateRef) pl, error, der, der_end);
 139     else if (CFDictionaryGetTypeID() == dataType)
 140         return der_encode_dictionary((CFDictionaryRef) pl, error, der, der_end);
 141     else if (CFSetGetTypeID() == dataType)
 142         return der_encode_set((CFSetRef) pl, error, der, der_end);
 143     else if (CFStringGetTypeID() == dataType)
 144         return der_encode_string((CFStringRef) pl, error, der, der_end);
 145     else if (CFNumberGetTypeID() == dataType)
 146         return der_encode_number((CFNumberRef) pl, error, der, der_end);
 147         else if (CFNullGetTypeID() == dataType)
 148                 return der_encode_null((CFNullRef) pl, error, der, der_end);
 149     else {
 150         SecCFDERCreateError(kSecDERErrorUnsupportedCFObject, CFSTR("Unsupported CFType"), NULL, error);
 151         return NULL;
 152     }
 153 }
 154
 155 // Similar to CFPropertyListCreateData
 156
 157 CFDataRef CFPropertyListCreateDERData(CFAllocatorRef allocator, CFPropertyListRef plist, CFErrorRef *error) {
 158     size_t len = der_sizeof_plist(plist, error);
 159     CFMutableDataRef encoded = CFDataCreateMutable(0, len);
 160     CFDataSetLength(encoded, len);
 161     uint8_t *der_end = CFDataGetMutableBytePtr(encoded);
 162     const uint8_t *der = der_end;
 163     der_end += len;
 164     der_end = der_encode_plist(plist, error, der, der_end);
 165     if (!der_end) {
 166         CFReleaseNull(encoded);
 167     } else {
 168         assert(!der_end || der_end == der);
 169     }
 170     return encoded;
 171 }
 172
 173 CFPropertyListRef CFPropertyListCreateWithDERData(CFAllocatorRef allocator, CFDataRef data, CFOptionFlags options, CFPropertyListFormat *format, CFErrorRef *error) {
 174     CFPropertyListRef plist = NULL;
 175     const uint8_t *der = CFDataGetBytePtr(data);
 176     const uint8_t *der_end = der + CFDataGetLength(data);
 177     der = der_decode_plist(0, kCFPropertyListMutableContainers, &plist, error, der, der_end);
 178     if (der && der != der_end) {
 179         SecCFDERCreateError(kSecDERErrorUnknownEncoding, CFSTR("trailing garbage after plist item"), NULL, error);
 180         CFReleaseNull(plist);
 181     } else if (format) {
 182         *format = kCFPropertyListDERFormat_v1_0;
 183     }
 184     return plist;
 185 }