OSX/libsecurity_transform/lib/Utilities.cpp

   1 /*
   2  * Copyright (c) 2011,2014 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 #include "Utilities.h"
  25 #include "SecTransform.h"
  26 #include <sys/sysctl.h>
  27 #include <syslog.h>
  28 #include <dispatch/dispatch.h>
  29
  30 void MyDispatchAsync(dispatch_queue_t queue, void(^block)(void))
  31 {
  32         fprintf(stderr, "Running job on queue %p\n", queue);
  33         dispatch_async(queue, block);
  34 }
  35
  36
  37
  38 dispatch_queue_t MyDispatchQueueCreate(const char* name, dispatch_queue_attr_t attr)
  39 {
  40         dispatch_queue_t result = dispatch_queue_create(name, attr);
  41         // fprintf(stderr, "Created queue %s as %p\n", name, result);
  42         return result;
  43 }
  44
  45
  46
  47 static CFErrorRef CreateErrorRefCore(CFStringRef domain, int errorCode, const char* format, va_list ap)
  48 {
  49         CFStringRef fmt = CFStringCreateWithCString(NULL, format, kCFStringEncodingUTF8);
  50         CFStringRef str = CFStringCreateWithFormatAndArguments(NULL, NULL, fmt, ap);
  51         va_end(ap);
  52         CFRelease(fmt);
  53
  54         CFStringRef keys[] = {kCFErrorDescriptionKey};
  55         CFStringRef values[] = {str};
  56
  57         CFErrorRef result = CFErrorCreateWithUserInfoKeysAndValues(NULL, domain, errorCode, (const void**) keys, (const void**) values, 1);
  58         CFRelease(str);
  59
  60         return result;
  61 }
  62
  63
  64
  65 CFErrorRef CreateGenericErrorRef(CFStringRef domain, int errorCode, const char* format, ...)
  66 {
  67         va_list ap;
  68         va_start(ap, format);
  69         return CreateErrorRefCore(domain, errorCode, format, ap);
  70 }
  71
  72
  73
  74 CFErrorRef CreateSecTransformErrorRef(int errorCode, const char* format, ...)
  75 {
  76         // create a CFError in the SecTransform error domain.  You can add an explanation, which is cool.
  77         va_list ap;
  78         va_start(ap, format);
  79
  80         return CreateErrorRefCore(kSecTransformErrorDomain, errorCode, format, ap);
  81 }
  82
  83
  84
  85 CFErrorRef CreateSecTransformErrorRefWithCFType(int errorCode, CFTypeRef message)
  86 {
  87         CFStringRef keys[] = {kCFErrorLocalizedDescriptionKey};
  88         CFTypeRef values[] = {message};
  89         return CFErrorCreateWithUserInfoKeysAndValues(NULL, kSecTransformErrorDomain, errorCode, (const void**) keys, (const void**) values, 1);
  90 }
  91
  92
  93
  94 CFTypeRef gAnnotatedRef = NULL;
  95
  96 CFTypeRef DebugRetain(const void* owner, CFTypeRef type)
  97 {
  98         CFTypeRef result = CFRetain(type);
  99         if (type == gAnnotatedRef)
 100         {
 101                 fprintf(stderr, "Object %p was retained by object %p, count = %ld\n", type, owner, CFGetRetainCount(type));
 102         }
 103
 104         return result;
 105 }
 106
 107
 108
 109 void DebugRelease(const void* owner, CFTypeRef type)
 110 {
 111         if (type == gAnnotatedRef)
 112         {
 113                 fprintf(stderr, "Object %p was released by object %p, count = %ld\n", type, owner, CFGetRetainCount(type) - 1);
 114         }
 115
 116         CFRelease(type);
 117 }
 118
 119 // Cribbed from _dispatch_bug and altered a bit
 120 void transforms_bug(size_t line, long val)
 121 {
 122     static dispatch_once_t pred;
 123     static char os_build[16];
 124     static void *last_seen;
 125     void *ra = __builtin_return_address(0);
 126     dispatch_once(&pred, ^{
 127 #ifdef __APPLE__
 128         int mib[] = { CTL_KERN, KERN_OSVERSION };
 129         size_t bufsz = sizeof(os_build);
 130         sysctl(mib, 2, os_build, &bufsz, NULL, 0);
 131 #else
 132         os_build[0] = '\0';
 133 #endif
 134     });
 135     if (last_seen != ra) {
 136         last_seen = ra;
 137         syslog(LOG_NOTICE, "BUG in SecTransforms: %s - %p - %lu - %lu", os_build, last_seen, (unsigned long)line, val);
 138     }
 139 }