Security/utilities/src/SecCFWrappers.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 <utilities/SecCFWrappers.h>
  26
  27 //
  28 // Global sigleton Zulu time.
  29 //
  30 CFGiblisGetSingleton(CFCalendarRef, SecCFCalendarGetZulu, zuluCalendar, ^{
  31     *zuluCalendar = CFCalendarCreateWithIdentifier(kCFAllocatorDefault, kCFGregorianCalendar);
  32     CFTimeZoneRef tz = CFTimeZoneCreateWithTimeIntervalFromGMT(kCFAllocatorDefault, 0.0);
  33     CFCalendarSetTimeZone(*zuluCalendar, tz);
  34     CFReleaseSafe(tz);
  35 })
  36
  37
  38
  39 void CFStringPerformWithCStringAndLength(CFStringRef inStr, void(^operation)(const char *utf8String, size_t utf8Length)) {
  40     const char *cstr = CFStringGetCStringPtr(inStr, kCFStringEncodingUTF8);
  41     if (cstr) {
  42         operation(cstr, strlen(cstr));
  43     } else {
  44         CFIndex neededLen = 0;
  45         CFRange range = { 0, CFStringGetLength(inStr) };
  46         CFStringGetBytes(inStr, range, kCFStringEncodingUTF8,
  47                          0, FALSE, NULL, 0, &neededLen);
  48         CFIndex usedLen = 0;
  49         if (neededLen < 4096) {
  50             char buf[neededLen + 1];
  51             CFStringGetBytes(inStr, range, kCFStringEncodingUTF8,
  52                              0, FALSE, (UInt8 *)buf, neededLen, &usedLen);
  53             assert(usedLen == neededLen);
  54             buf[usedLen] = 0;
  55             operation(buf, (size_t)usedLen);
  56             //cc_zero(neededLen, buf);
  57         } else {
  58             char *buf = malloc(neededLen + 1);
  59             CFStringGetBytes(inStr, range, kCFStringEncodingUTF8,
  60                              0, FALSE, (UInt8 *)buf, neededLen, &usedLen);
  61             assert(usedLen == neededLen);
  62             buf[usedLen] = 0;
  63             operation(buf, (size_t)usedLen);
  64             //cc_zero(neededLen, buf);
  65             free(buf);
  66         }
  67     }
  68 }
  69
  70 void CFStringPerformWithCString(CFStringRef inStr, void(^operation)(const char *utf8String)) {
  71     const char *cstr = CFStringGetCStringPtr(inStr, kCFStringEncodingUTF8);
  72     if (cstr) {
  73         operation(cstr);
  74     } else {
  75         CFIndex neededLen = 0;
  76         CFRange range = { 0, CFStringGetLength(inStr) };
  77         CFStringGetBytes(inStr, range, kCFStringEncodingUTF8,
  78                          0, FALSE, NULL, 0, &neededLen);
  79         CFIndex usedLen = 0;
  80         if (neededLen < 4096) {
  81             char buf[neededLen + 1];
  82             CFStringGetBytes(inStr, range, kCFStringEncodingUTF8,
  83                              0, FALSE, (UInt8 *)buf, neededLen, &usedLen);
  84             assert(usedLen == neededLen);
  85             buf[usedLen] = 0;
  86             operation(buf);
  87             //cc_zero(neededLen, buf);
  88         } else {
  89             char *buf = malloc(neededLen + 1);
  90             CFStringGetBytes(inStr, range, kCFStringEncodingUTF8,
  91                              0, FALSE, (UInt8 *)buf, neededLen, &usedLen);
  92             assert(usedLen == neededLen);
  93             buf[usedLen] = 0;
  94             operation(buf);
  95             //cc_zero(neededLen, buf);
  96             free(buf);
  97         }
  98     }
  99 }