libsecurity_keychain/lib/SecRandom.c

   1 /*
   2  * Copyright (c) 2006-2010 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  * SecFramework.c - generic non API class specific functions
  26  */
  27
  28 #define SEC_BUILDER 1
  29
  30 //#include "SecFramework.h"
  31 #include <strings.h>
  32 #include <CoreFoundation/CFBundle.h>
  33 #include <CoreFoundation/CFURLAccess.h>
  34 #include "SecRandomP.h"
  35 #include <CommonCrypto/CommonRandomSPI.h>
  36 #include <stdlib.h>
  37
  38 /* Default random ref for /dev/random. */
  39 const SecRandomRef kSecRandomDefault = NULL;
  40
  41
  42 int SecRandomCopyBytes(SecRandomRef rnd, size_t count, uint8_t *bytes) {
  43     if (rnd != kSecRandomDefault)
  44         return errSecParam;
  45     return CCRandomCopyBytes(kCCRandomDefault, bytes, count);
  46 }
  47
  48
  49 CFDataRef
  50 SecRandomCopyData(SecRandomRef rnd, size_t count)
  51 {
  52     uint8_t *bytes;
  53     CFDataRef retval = NULL;
  54
  55     if (rnd != kSecRandomDefault) return NULL;
  56     if((bytes = malloc(count)) == NULL) return NULL;
  57     if(CCRandomCopyBytes(kCCRandomDefault, bytes, count) == kCCSuccess)
  58         retval = CFDataCreate(kCFAllocatorDefault, bytes, count);
  59     bzero(bytes, count);
  60     free(bytes);
  61     return retval;
  62 }
  63