OSX/libsecurity_utilities/lib/cfutilities.cpp

   1 /*
   2  * Copyright (c) 2000-2004,2011-2014 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
  25 //
  26 // CoreFoundation related utilities
  27 //
  28 #include <security_utilities/cfutilities.h>
  29 #include <security_utilities/errors.h>
  30 #include <security_utilities/debugging.h>
  31 #include <cstdarg>
  32 #include <vector>
  33
  34
  35 namespace Security {
  36
  37
  38 ModuleNexus<CFEmptyArray> cfEmptyArray;
  39
  40 CFEmptyArray::CFEmptyArray()
  41 {
  42         mArray = CFArrayCreate(NULL, NULL, 0, NULL);
  43 }
  44
  45
  46 //
  47 // Turn a C(++) string into a CFURLRef indicating a file: path
  48 //
  49 CFURLRef makeCFURL(const char *s, bool isDirectory, CFURLRef base)
  50 {
  51         if (base)
  52                 return CFURLCreateWithFileSystemPathRelativeToBase(NULL,
  53                         CFTempString(s), kCFURLPOSIXPathStyle, isDirectory, base);
  54         else
  55                 return CFURLCreateWithFileSystemPath(NULL,
  56                         CFTempString(s), kCFURLPOSIXPathStyle, isDirectory);
  57 }
  58
  59 CFURLRef makeCFURL(CFStringRef s, bool isDirectory, CFURLRef base)
  60 {
  61         if (base)
  62                 return CFURLCreateWithFileSystemPathRelativeToBase(NULL, s, kCFURLPOSIXPathStyle, isDirectory, base);
  63         else
  64                 return CFURLCreateWithFileSystemPath(NULL, s, kCFURLPOSIXPathStyle, isDirectory);
  65 }
  66
  67
  68 //
  69 // CFMallocData objects
  70 //
  71 CFMallocData::operator CFDataRef ()
  72 {
  73         CFDataRef result = makeCFDataMalloc(mData, mSize);
  74         if (!result)
  75                 CFError::throwMe();
  76         mData = NULL;   // release ownership
  77         return result;
  78 }
  79
  80
  81 //
  82 // Make CFDictionaries from stuff
  83 //
  84 CFDictionaryRef makeCFDictionary(unsigned count, ...)
  85 {
  86         CFTypeRef keys[count], values[count];
  87         va_list args;
  88         va_start(args, count);
  89         for (unsigned n = 0; n < count; n++) {
  90                 keys[n] = va_arg(args, CFTypeRef);
  91                 values[n] = va_arg(args, CFTypeRef);
  92         }
  93         va_end(args);
  94         return CFDictionaryCreate(NULL, (const void **)keys, (const void **)values, count,
  95                 &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
  96 }
  97
  98 CFMutableDictionaryRef makeCFMutableDictionary()
  99 {
 100         if (CFMutableDictionaryRef r = CFDictionaryCreateMutable(NULL, 0,
 101                 &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks))
 102                 return r;
 103         CFError::throwMe();
 104 }
 105
 106 CFMutableDictionaryRef makeCFMutableDictionary(unsigned count, ...)
 107 {
 108         CFMutableDictionaryRef dict = makeCFMutableDictionary();
 109         if (count > 0) {
 110                 va_list args;
 111                 va_start(args, count);
 112                 for (unsigned n = 0; n < count; n++) {
 113                         CFTypeRef key = va_arg(args, CFTypeRef);
 114                         CFTypeRef value = va_arg(args, CFTypeRef);
 115                         CFDictionaryAddValue(dict, key, value);
 116                 }
 117                 va_end(args);
 118         }
 119         return dict;
 120 }
 121
 122 CFMutableDictionaryRef makeCFMutableDictionary(CFDictionaryRef dict)
 123 {
 124         if (CFMutableDictionaryRef r = CFDictionaryCreateMutableCopy(NULL, 0, dict))
 125                 return r;
 126         CFError::throwMe();
 127 }
 128
 129 CFDictionaryRef makeCFDictionaryFrom(CFDataRef data)
 130 {
 131         if (data) {
 132                 CFPropertyListRef plist = CFPropertyListCreateFromXMLData(NULL, data,
 133                         kCFPropertyListImmutable, NULL);
 134                 if (plist && CFGetTypeID(plist) != CFDictionaryGetTypeID())
 135                         CFError::throwMe();
 136                 return CFDictionaryRef(plist);
 137         } else
 138                 return NULL;
 139
 140 }
 141
 142 CFDictionaryRef makeCFDictionaryFrom(const void *data, size_t length)
 143 {
 144         return makeCFDictionaryFrom(CFTempData(data, length).get());
 145 }
 146
 147
 148
 149 static void cfarrayApplyBlock_func(const void *value, const void *ctx)
 150 {
 151     CFArrayApplierBlock block = CFArrayApplierBlock(ctx);
 152     block(value);
 153 }
 154 void cfArrayApplyBlock(CFArrayRef array, CFRange range, CFArrayApplierBlock block)
 155 {
 156     CFArrayApplyFunction(array, range, (CFArrayApplierFunction)cfarrayApplyBlock_func, block);
 157 }
 158 void cfArrayApplyBlock(CFArrayRef array, CFArrayApplierBlock block)
 159 {
 160     CFRange range = CFRangeMake(0, CFArrayGetCount(array));
 161     cfArrayApplyBlock(array, range, block);
 162 }
 163
 164 static void cfdictionaryApplyBlock_func(const void *key, const void *value, void *ctx)
 165 {
 166     CFDictionaryApplierBlock block = CFDictionaryApplierBlock(ctx);
 167     block(key, value);
 168 }
 169 void cfDictionaryApplyBlock(CFDictionaryRef dict, CFDictionaryApplierBlock block)
 170 {
 171     CFDictionaryApplyFunction(dict, cfdictionaryApplyBlock_func, block);
 172 }
 173
 174
 175 //
 176 // Turn a CFString into a UTF8-encoded C++ string.
 177 // If release==true, the argument will be CFReleased even in case of error.
 178 //
 179 string cfString(CFStringRef str)
 180 {
 181         if (!str)
 182                 return "";
 183         // quick path first
 184         if (const char *s = CFStringGetCStringPtr(str, kCFStringEncodingUTF8)) {
 185                 return s;
 186         }
 187
 188         // need to extract into buffer
 189         string ret;
 190         CFIndex length = CFStringGetMaximumSizeForEncoding(CFStringGetLength(str), kCFStringEncodingUTF8);
 191         std::vector<char> buffer;
 192         buffer.resize(length + 1);
 193         if (CFStringGetCString(str, &buffer[0], length + 1, kCFStringEncodingUTF8))
 194                 ret = &buffer[0];
 195         return ret;
 196 }
 197
 198 string cfStringRelease(CFStringRef inStr)
 199 {
 200         CFRef<CFStringRef> str(inStr);
 201         return cfString(str);
 202 }
 203
 204 string cfString(CFURLRef inUrl)
 205 {
 206         if (!inUrl)
 207                 CFError::throwMe();
 208
 209         UInt8 buffer[PATH_MAX+1];
 210         if (CFURLGetFileSystemRepresentation(inUrl, true, buffer, sizeof(buffer)))
 211                 return string(reinterpret_cast<char *>(buffer));
 212         else
 213                 CFError::throwMe();
 214 }
 215
 216 string cfStringRelease(CFURLRef inUrl)
 217 {
 218         CFRef<CFURLRef> bundle(inUrl);
 219         return cfString(bundle);
 220 }
 221
 222 string cfString(CFBundleRef inBundle)
 223 {
 224         if (!inBundle)
 225                 CFError::throwMe();
 226         return cfStringRelease(CFBundleCopyBundleURL(inBundle));
 227 }
 228
 229 string cfStringRelease(CFBundleRef inBundle)
 230 {
 231         CFRef<CFBundleRef> bundle(inBundle);
 232         return cfString(bundle);
 233 }
 234
 235
 236 string cfString(CFTypeRef it, OSStatus err)
 237 {
 238         if (it == NULL)
 239                 MacOSError::throwMe(err);
 240         CFTypeID id = CFGetTypeID(it);
 241         if (id == CFStringGetTypeID())
 242                 return cfString(CFStringRef(it));
 243         else if (id == CFURLGetTypeID())
 244                 return cfString(CFURLRef(it));
 245         else if (id == CFBundleGetTypeID())
 246                 return cfString(CFBundleRef(it));
 247         else
 248                 return cfString(CFCopyDescription(it), true);
 249 }
 250
 251
 252 //
 253 // CFURLAccess wrappers for specific purposes
 254 //
 255 CFDataRef cfLoadFile(CFURLRef url)
 256 {
 257         assert(url);
 258         CFDataRef data;
 259         SInt32 error;
 260         if (CFURLCreateDataAndPropertiesFromResource(NULL, url,
 261                 &data, NULL, NULL, &error)) {
 262                 return data;
 263         } else {
 264                 secinfo("cfloadfile", "failed to fetch %s error=%d", cfString(url).c_str(), int(error));
 265                 return NULL;
 266         }
 267 }
 268
 269 CFDataRef cfLoadFile(int fd, size_t bytes)
 270 {
 271         uint8_t *buffer = (uint8_t *) malloc(bytes);
 272
 273         if (buffer == NULL)
 274                 return NULL;
 275
 276         if (read(fd, buffer, bytes) != bytes) {
 277                 free(buffer);
 278                 return NULL;
 279         }
 280
 281         CFDataRef result = CFDataCreateWithBytesNoCopy(kCFAllocatorMalloc, buffer, bytes, kCFAllocatorMalloc);
 282
 283         // If CFDataCreateWithBytesNoCopy fails, the buffer is not free()-ed
 284         if (result == NULL) {
 285                 free(buffer);
 286                 return NULL;
 287         }
 288
 289         return result;
 290 }
 291
 292 //
 293 // CFArray creators
 294 //
 295 CFArrayRef makeCFArray(CFIndex count, ...)
 296 {
 297         CFTypeRef elements[count];
 298         va_list args;
 299         va_start(args, count);
 300         for (CFIndex n = 0; n < count; n++)
 301                 elements[n] = va_arg(args, CFTypeRef);
 302         va_end(args);
 303         return CFArrayCreate(NULL, elements, count, &kCFTypeArrayCallBacks);
 304 }
 305
 306 CFMutableArrayRef makeCFMutableArray(CFIndex count, ...)
 307 {
 308         CFMutableArrayRef array = CFArrayCreateMutable(NULL, count, &kCFTypeArrayCallBacks);
 309         va_list args;
 310         va_start(args, count);
 311         for (CFIndex n = 0; n < count; n++)
 312                 CFArrayAppendValue(array, va_arg(args, CFTypeRef));
 313         va_end(args);
 314         return array;
 315 }
 316
 317
 318 }       // end namespace Security