utilities/src/der_boolean.c

   1 //
   2 //  der_boolean.c
   3 //  utilities
   4 //
   5 //  Created by Mitch Adler on 6/19/12.
   6 //  Copyright (c) 2012 Apple Inc. All rights reserved.
   7 //
   8
   9 #include <stdio.h>
  10
  11 #include "utilities/SecCFRelease.h"
  12 #include "utilities/der_plist.h"
  13 #include "utilities/der_plist_internal.h"
  14
  15 #include <corecrypto/ccder.h>
  16 #include <CoreFoundation/CoreFoundation.h>
  17
  18
  19 const uint8_t* der_decode_boolean(CFAllocatorRef allocator, CFOptionFlags mutability,
  20                                   CFBooleanRef* boolean, CFErrorRef *error,
  21                                   const uint8_t* der, const uint8_t *der_end)
  22 {
  23     if (NULL == der)
  24         return NULL;
  25
  26     size_t payload_size = 0;
  27     const uint8_t *payload = ccder_decode_tl(CCDER_BOOLEAN, &payload_size, der, der_end);
  28
  29     if (NULL == payload || (der_end - payload) < payload_size || payload_size != 1) {
  30         SecCFDERCreateError(kSecDERErrorUnknownEncoding, CFSTR("Unknown boolean encoding"), NULL, error);
  31         return NULL;
  32     }
  33
  34     *boolean = *payload ? kCFBooleanTrue : kCFBooleanFalse;
  35
  36     return payload + payload_size;
  37 }
  38
  39
  40 size_t der_sizeof_boolean(CFBooleanRef data __unused, CFErrorRef *error)
  41 {
  42     return ccder_sizeof(CCDER_BOOLEAN, 1);
  43 }
  44
  45
  46 uint8_t* der_encode_boolean(CFBooleanRef boolean, CFErrorRef *error,
  47                             const uint8_t *der, uint8_t *der_end)
  48 {
  49     uint8_t value = CFBooleanGetValue(boolean);
  50
  51     return ccder_encode_tl(CCDER_BOOLEAN, 1, der,
  52            ccder_encode_body(1, &value, der, der_end));
  53
  54 }