OSX/sec/Security/SecBase.c

   1 /*
   2  * Copyright (c) 2006-2017 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  * SecBase.c
  26  */
  27
  28 #ifdef STANDALONE
  29 /* Allows us to build genanchors against the BaseSDK. */
  30 #undef __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__
  31 #undef __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
  32 #endif
  33
  34 #include <Availability.h>
  35 #include "SecFramework.h"
  36 #include <dispatch/dispatch.h>
  37 #include <CoreFoundation/CFBundle.h>
  38 #include <CoreFoundation/CFURLAccess.h>
  39 #include <Security/SecRandom.h>
  40 #include <CommonCrypto/CommonRandomSPI.h>
  41 #include <fcntl.h>
  42 #include <sys/types.h>
  43 #include <unistd.h>
  44 #include <utilities/debugging.h>
  45 #include <utilities/SecCFWrappers.h>
  46 #include <Security/SecBase.h>
  47 #include <inttypes.h>
  48
  49 #if !TARGET_OS_OSX
  50
  51 static CFStringRef copyErrorMessageFromBundle(OSStatus status, CFStringRef tableName);
  52
  53 // caller MUST release the string, since it is gotten with "CFCopyLocalizedStringFromTableInBundle"
  54 // intended use of reserved param is to pass in CFStringRef with name of the Table for lookup
  55 // Will look by default in "SecErrorMessages.strings" in the resources of Security.framework.
  56
  57 CFStringRef
  58 SecCopyErrorMessageString(OSStatus status, void *reserved)
  59 {
  60     CFStringRef result = copyErrorMessageFromBundle(status, CFSTR("SecErrorMessages"));
  61     if (!result)
  62         result = copyErrorMessageFromBundle(status, CFSTR("SecDebugErrorMessages"));
  63
  64     if (!result)
  65     {
  66         // no error message found, so format a faked-up error message from the status
  67         result = CFStringCreateWithFormat(NULL, NULL, CFSTR("OSStatus %d"), (int)status);
  68     }
  69
  70     return result;
  71 }
  72
  73 CFStringRef
  74 copyErrorMessageFromBundle(OSStatus status,CFStringRef tableName)
  75 {
  76
  77     CFStringRef errorString = nil;
  78     CFStringRef keyString = nil;
  79     CFBundleRef secBundle = NULL;
  80
  81     // Make a bundle instance using the URLRef.
  82     secBundle = CFBundleGetBundleWithIdentifier(kSecFrameworkBundleID);
  83     if (!secBundle)
  84         goto exit;
  85
  86     // Convert status to Int32 string representation, e.g. "-25924"
  87     keyString = CFStringCreateWithFormat (kCFAllocatorDefault, NULL, CFSTR("%d"), (int)status);
  88     if (!keyString)
  89         goto exit;
  90
  91     errorString = CFCopyLocalizedStringFromTableInBundle(keyString, tableName, secBundle, NULL);
  92     if (CFStringCompare(errorString, keyString, 0) == kCFCompareEqualTo)    // no real error message
  93     {
  94         if (errorString)
  95             CFRelease(errorString);
  96         errorString = nil;
  97     }
  98 exit:
  99     if (keyString)
 100         CFRelease(keyString);
 101
 102     return errorString;
 103 }
 104
 105 const SecRandomRef kSecRandomDefault = NULL;
 106
 107 int SecRandomCopyBytes(__unused SecRandomRef rnd, size_t count, void *bytes) {
 108     return CCRandomCopyBytes(kCCRandomDefault, bytes, count);
 109 }
 110
 111 #endif // TARGET_OS_OSX