CFURLAccess.c

   1 /*
   2  * Copyright (c) 2015 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 /*      CFURLAccess.c
  25         Copyright (c) 1999-2014, Apple Inc. All rights reserved.
  26         Responsibility: Jim Luther/Chris Linn
  27 */
  28
  29 /*------
  30 CFData read/write routines
  31 -------*/
  32
  33 #pragma GCC diagnostic push
  34 #pragma GCC diagnostic ignored "-Wdeprecated"
  35
  36 #include "CFInternal.h"
  37 #include <CoreFoundation/CFBase.h>
  38 #include <CoreFoundation/CFURL.h>
  39 #include <CoreFoundation/CFDictionary.h>
  40 #include <CoreFoundation/CFURLAccess.h>
  41 #include <CoreFoundation/CFDate.h>
  42 #include <CoreFoundation/CFNumber.h>
  43 #include <string.h>
  44 #include <ctype.h>
  45 #if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_EMBEDDED_MINI || DEPLOYMENT_TARGET_LINUX
  46 #include <stdlib.h>
  47 #include <unistd.h>
  48 #include <dirent.h>
  49 #include <sys/stat.h>
  50 #include <sys/types.h>
  51 #include <pwd.h>
  52 #include <fcntl.h>
  53 #elif DEPLOYMENT_TARGET_WINDOWS
  54 #include <io.h>
  55 #include <sys/stat.h>
  56 #include <sys/types.h>
  57 #include <fcntl.h>
  58 #include <ctype.h>
  59 #else
  60 #error Unknown or unspecified DEPLOYMENT_TARGET
  61 #endif
  62 #if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_EMBEDDED_MINI
  63 #include <dlfcn.h>
  64 #endif
  65
  66 #if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
  67
  68
  69 DEFINE_WEAK_CFNETWORK_FUNC_FAIL(Boolean, _CFURLCreateDataAndPropertiesFromResource, (CFAllocatorRef A, CFURLRef B, CFDataRef *C, CFDictionaryRef *D, CFArrayRef E, SInt32 *F), (A, B, C, D, E, F), { if(C) *C=NULL; if (D) *D=NULL; if(F) *F=kCFURLImproperArgumentsError; }, false)
  70 DEFINE_WEAK_CFNETWORK_FUNC_FAIL(Boolean, _CFURLWriteDataAndPropertiesToResource, (CFURLRef A, CFDataRef B, CFDictionaryRef C, SInt32 *D), (A, B, C, D), if (D) *D = kCFURLImproperArgumentsError, false)
  71
  72 DEFINE_WEAK_CFNETWORK_FUNC_FAIL(Boolean, _CFURLDestroyResource, (CFURLRef A, SInt32 *B), (A, B), if(B) *B = kCFURLImproperArgumentsError, false)
  73
  74 #endif
  75
  76 typedef struct __NSString__ *NSString;
  77
  78 /*
  79     Pre-10.6 property keys
  80 */
  81
  82 CONST_STRING_DECL(kCFURLFileExists, "kCFURLFileExists")
  83 CONST_STRING_DECL(kCFURLFilePOSIXMode, "kCFURLFilePOSIXMode")
  84 CONST_STRING_DECL(kCFURLFileDirectoryContents, "kCFURLFileDirectoryContents")
  85 CONST_STRING_DECL(kCFURLFileLength, "kCFURLFileLength")
  86 CONST_STRING_DECL(kCFURLFileLastModificationTime, "kCFURLFileLastModificationTime")
  87 CONST_STRING_DECL(kCFURLFileOwnerID, "kCFURLFileOwnerID")
  88 CONST_STRING_DECL(kCFURLHTTPStatusCode, "kCFURLHTTPStatusCode")
  89 CONST_STRING_DECL(kCFURLHTTPStatusLine, "kCFURLHTTPStatusLine")
  90
  91 CONST_STRING_DECL(kCFDataURLDataLength, "kCFDataURLDataLength")
  92 CONST_STRING_DECL(kCFDataURLMimeType, "kCFDataURLMimeType")
  93 CONST_STRING_DECL(kCFDataURLTextEncodingName, "kCFDataURLTextEncodingName")
  94
  95 // Compatibility property strings -- we obsoleted these names pre-DP4. REW, 5/22/2000
  96 CONST_STRING_DECL(kCFFileURLExists, "kCFURLFileExists")
  97 CONST_STRING_DECL(kCFFileURLPOSIXMode, "kCFURLFilePOSIXMode")
  98 CONST_STRING_DECL(kCFFileURLDirectoryContents, "kCFURLFileDirectoryContents")
  99 CONST_STRING_DECL(kCFFileURLSize, "kCFURLFileLength")
 100 CONST_STRING_DECL(kCFFileURLLastModificationTime, "kCFURLFileLastModificationTime")
 101 CONST_STRING_DECL(kCFHTTPURLStatusCode, "kCFURLHTTPStatusCode")
 102 CONST_STRING_DECL(kCFHTTPURLStatusLine, "kCFURLHTTPStatusLine")
 103
 104 // Copied pretty much verbatim from NSData; note that files are still special cased in this code.  Ultimately, we probably want to treat file URLs the same way as any other URL (go through the URL Access layer).  -- REW, 10/21/98
 105
 106 /*************************/
 107 /* file: access routines */
 108 /*************************/
 109
 110 //#warning CF:For the moment file access failures are ill defined and set the error code to kCFURLUnknownError
 111
 112 static CFDictionaryRef _CFFileURLCreatePropertiesFromResource(CFAllocatorRef alloc, CFURLRef url, CFArrayRef desiredProperties, SInt32 *errorCode) {
 113     // MF:!!! This could/should be changed to use _CFGetFileProperties() to do the actual figuring.
 114     static CFArrayRef _allProps = NULL;
 115     CFRange arrayRange;
 116     SInt32 idx;
 117     CFMutableDictionaryRef propertyDict = NULL;
 118
 119     Boolean exists;
 120     SInt32 posixMode;
 121     int64_t size;
 122     CFDateRef modTime = NULL, *modTimePtr = NULL;
 123     CFArrayRef contents = NULL, *contentsPtr = NULL;
 124     SInt32 ownerID;
 125
 126     if (errorCode) *errorCode = 0;
 127     if (!desiredProperties) {
 128         // Cheap and dirty hack to make this work for the moment; ultimately we need to do something more sophisticated.  This will result in an error return whenever a property key is defined which isn't applicable to all file URLs.  REW, 3/2/99
 129         if (!_allProps) {
 130             const void *values[9];
 131             values[0] = kCFURLFileExists;
 132             values[1] = kCFURLFilePOSIXMode;
 133             values[2] = kCFURLFileDirectoryContents;
 134             values[3] = kCFURLFileLength;
 135             values[4] = kCFURLFileLastModificationTime;
 136             values[5] = kCFURLFileOwnerID;
 137             _allProps = CFArrayCreate(kCFAllocatorSystemDefault, values, 6, &kCFTypeArrayCallBacks);
 138         }
 139         desiredProperties = _allProps;
 140     }
 141
 142     arrayRange.location = 0;
 143     arrayRange.length = CFArrayGetCount(desiredProperties);
 144     propertyDict = CFDictionaryCreateMutable(alloc, 0, & kCFTypeDictionaryKeyCallBacks, & kCFTypeDictionaryValueCallBacks);
 145     if (arrayRange.length == 0) return propertyDict;
 146
 147     if (CFArrayContainsValue(desiredProperties, arrayRange, kCFURLFileDirectoryContents)) {
 148         contentsPtr = &contents;
 149     }
 150     if (CFArrayContainsValue(desiredProperties, arrayRange, kCFURLFileLastModificationTime)) {
 151         modTimePtr = &modTime;
 152     }
 153
 154     if (_CFGetFileProperties(alloc, url, &exists, &posixMode, &size, modTimePtr, &ownerID, contentsPtr) != 0) {
 155
 156         //  If all they've asked for is whether this file exists, then any error will just make
 157         //  this return kCFURLFileExists = kCFBooleanFalse, which handles the case where the filename is invalid or too long or something.
 158         if ( arrayRange.length == 1 && CFArrayContainsValue( desiredProperties, arrayRange, kCFURLFileExists ) ) {
 159             CFDictionarySetValue(propertyDict, kCFURLFileExists, kCFBooleanFalse);
 160         }
 161         else if (errorCode) {
 162             *errorCode = kCFURLUnknownError;
 163         }
 164         return propertyDict;
 165     }
 166
 167     for (idx = 0; idx < arrayRange.length; idx ++) {
 168         CFStringRef key = (CFMutableStringRef )CFArrayGetValueAtIndex(desiredProperties, idx);
 169         if (key == kCFURLFilePOSIXMode || CFEqual(kCFURLFilePOSIXMode, key)) {
 170             if (exists) {
 171                 CFNumberRef num = CFNumberCreate(alloc, kCFNumberSInt32Type, &posixMode);
 172                 CFDictionarySetValue(propertyDict, kCFURLFilePOSIXMode, num);
 173                 CFRelease(num);
 174             } else if (errorCode) {
 175                 *errorCode = kCFURLUnknownError;
 176             }
 177         } else if (key == kCFURLFileDirectoryContents || CFEqual(kCFURLFileDirectoryContents, key)) {
 178             if (exists && (posixMode & S_IFMT) == S_IFDIR && contents) {
 179                 CFDictionarySetValue(propertyDict, kCFURLFileDirectoryContents, contents);
 180             } else if (errorCode) {
 181                 *errorCode = kCFURLUnknownError;
 182             }
 183         } else if (key == kCFURLFileLength || CFEqual(kCFURLFileLength, key)) {
 184             if (exists) {
 185                 CFNumberRef num = CFNumberCreate(alloc, kCFNumberSInt64Type, &size);
 186                 CFDictionarySetValue(propertyDict, kCFURLFileLength, num);
 187                 CFRelease(num);
 188             } else if (errorCode) {
 189                 *errorCode = kCFURLUnknownError;
 190             }
 191         } else if (key == kCFURLFileLastModificationTime || CFEqual(kCFURLFileLastModificationTime, key)) {
 192             if (exists && modTime) {
 193                 CFDictionarySetValue(propertyDict, kCFURLFileLastModificationTime, modTime);
 194             } else if (errorCode) {
 195                 *errorCode = kCFURLUnknownError;
 196             }
 197         } else if (key == kCFURLFileExists || CFEqual(kCFURLFileExists, key)) {
 198             if (exists) {
 199                 CFDictionarySetValue(propertyDict, kCFURLFileExists, kCFBooleanTrue);
 200             } else {
 201                 CFDictionarySetValue(propertyDict, kCFURLFileExists, kCFBooleanFalse);
 202             }
 203         } else if (key == kCFURLFileOwnerID || CFEqual(kCFURLFileOwnerID, key)) {
 204             if (exists) {
 205                 CFNumberRef num  = CFNumberCreate(alloc, kCFNumberSInt32Type, &ownerID);
 206                 CFDictionarySetValue(propertyDict, kCFURLFileOwnerID, num);
 207                 CFRelease(num);
 208             } else if (errorCode) {
 209                 *errorCode = kCFURLUnknownError;
 210             }
 211         // Add more properties here
 212         } else if (errorCode) {
 213             *errorCode = kCFURLUnknownPropertyKeyError;
 214         }
 215     }
 216     if (modTime) CFRelease(modTime);
 217     if (contents) CFRelease(contents);
 218     return propertyDict;
 219 }
 220
 221 static Boolean _CFFileURLWritePropertiesToResource(CFURLRef url, CFDictionaryRef propertyDict, SInt32 *errorCode) {
 222     CFTypeRef buffer[16];
 223     CFTypeRef *keys;
 224     CFTypeRef *values;
 225     Boolean result = true;
 226     SInt32 idx, count;
 227     char cPath[CFMaxPathSize];
 228
 229     if (!CFURLGetFileSystemRepresentation(url, true, (unsigned char *)cPath, CFMaxPathSize)) {
 230         if (errorCode) *errorCode = kCFURLImproperArgumentsError;
 231         return false;
 232     }
 233
 234     count = CFDictionaryGetCount(propertyDict);
 235     if (count < 8) {
 236         keys = buffer;
 237         values = buffer+8;
 238     } else {
 239         keys = (CFTypeRef *)CFAllocatorAllocate(CFGetAllocator(url), sizeof(void *) * count * 2, 0);
 240         values = keys + count;
 241     }
 242     CFDictionaryGetKeysAndValues(propertyDict, keys, values);
 243
 244     for (idx = 0; idx < count; idx ++) {
 245         CFStringRef key = (CFStringRef)keys[idx];
 246         CFTypeRef value = values[idx];
 247         if (key == kCFURLFilePOSIXMode || CFEqual(kCFURLFilePOSIXMode, key)) {
 248             SInt32 mode;
 249             int err;
 250             if (CFNumberGetTypeID() == CFGetTypeID(value)) {
 251                 CFNumberRef modeNum = (CFNumberRef)value;
 252                 CFNumberGetValue(modeNum, kCFNumberSInt32Type, &mode);
 253             } else {
 254 #if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_EMBEDDED_MINI || DEPLOYMENT_TARGET_LINUX
 255 #define MODE_TYPE mode_t
 256 #elif DEPLOYMENT_TARGET_WINDOWS
 257 #define MODE_TYPE uint16_t
 258 #else
 259 #error Unknown or unspecified DEPLOYMENT_TARGET
 260 #endif
 261                 const MODE_TYPE *modePtr = (const MODE_TYPE *)CFDataGetBytePtr((CFDataRef)value);
 262                 mode = *modePtr;
 263             }
 264             err = chmod(cPath, mode);
 265             if (err != 0) result = false;
 266         } else {
 267             result = false;
 268         }
 269     }
 270
 271     if ((CFTypeRef)keys != buffer) CFAllocatorDeallocate(CFGetAllocator(url), keys);
 272
 273     if (errorCode) *errorCode = result ? 0 : kCFURLUnknownError;
 274     return result;
 275 }
 276
 277 static Boolean _CFFileURLCreateDataAndPropertiesFromResource(CFAllocatorRef alloc, CFURLRef url, CFDataRef *fetchedData, CFArrayRef desiredProperties, CFDictionaryRef *fetchedProperties, SInt32 *errorCode) {
 278     Boolean success = true;
 279
 280     if (errorCode) *errorCode = 0;
 281     if (fetchedData) {
 282         void *bytes;
 283         CFIndex length;
 284         Boolean releaseAlloc = false;
 285
 286         if (alloc == NULL) {
 287             // We need a real allocator to pass to _CFReadBytesFromFile so that the CFDataRef we create with
 288                         //      CFDataCreateWithBytesNoCopy() can free up the object _CFReadBytesFromFile() returns.
 289             alloc = (CFAllocatorRef)CFRetain(__CFGetDefaultAllocator());
 290             releaseAlloc = true;
 291         }
 292         if (!_CFReadBytesFromFile(alloc, url, &bytes, &length, 0, 0)) {
 293             if (errorCode) *errorCode = kCFURLUnknownError;
 294             *fetchedData = NULL;
 295             success = false;
 296         } else {
 297             *fetchedData = CFDataCreateWithBytesNoCopy(alloc, (const UInt8 *)bytes, length, alloc);
 298         }
 299         if (releaseAlloc) {
 300             // Now the CFData should be hanging on to it.
 301             CFRelease(alloc);
 302         }
 303     }
 304
 305     if (fetchedProperties) {
 306         *fetchedProperties = _CFFileURLCreatePropertiesFromResource(alloc, url, desiredProperties, errorCode);
 307         if (!*fetchedProperties)
 308             success = false;
 309     }
 310
 311     if ( ! success && fetchedData && *fetchedData ) {
 312         CFRelease( *fetchedData );
 313         *fetchedData = NULL;
 314     }
 315
 316     return success;
 317 }
 318
 319 /*
 320  * Support for data: URLs - RFC 2397
 321  * Currently this is spi for CFNetwork, to make it API, just put these constants in CFURLAccess.h
 322  */
 323
 324 /*
 325 CF_EXPORT
 326 const CFStringRef kCFDataURLDataLength;
 327 CF_EXPORT
 328 const CFStringRef kCFDataURLMimeType;
 329 CF_EXPORT
 330 const CFStringRef kCFDataURLTextEncodingName;
 331 */
 332
 333 /* Properties for the data: scheme. */
 334 /* kCFDataURLDataLength is a CFNumber giving the data's length in bytes. */
 335 /* kCFDataURLMimeType is a CFString. */
 336 /* kCFDataURLTextEncodingName is a CFString. */
 337
 338 /* REMINDSMZ: From CFURLResponse.c */
 339 static CFStringRef mimeTypeFromContentTypeComponent(CFStringRef component) {
 340     CFIndex compLen = CFStringGetLength(component);
 341     CFStringInlineBuffer buf;
 342     CFIndex idx;
 343     CFIndex firstChar = -1, lastChar = -1;
 344     CFCharacterSetRef whitespaceSet = CFCharacterSetGetPredefined(kCFCharacterSetWhitespace);
 345     CFStringInitInlineBuffer(component, &buf, CFRangeMake(0, compLen));
 346
 347     for (idx = 0; idx < compLen; idx ++) {
 348                 UniChar ch = CFStringGetCharacterFromInlineBuffer(&buf, idx);
 349                 if (ch == ';') {
 350                         // Delimits the charset
 351                         break;
 352                 } else if (firstChar == -1) {
 353                         if (!CFCharacterSetIsCharacterMember(whitespaceSet, ch)) {
 354                                 firstChar = idx;
 355                         }
 356                 } else if (!CFCharacterSetIsCharacterMember(whitespaceSet, ch)) {
 357                         lastChar = idx;
 358                 }
 359     }
 360     if (firstChar != -1 && lastChar != -1) {
 361                 CFMutableStringRef newContentType = CFStringCreateMutableCopy(CFGetAllocator(component), compLen, component);
 362                 if (lastChar != compLen - 1) {
 363                         CFStringDelete(newContentType, CFRangeMake(lastChar + 1, compLen - lastChar - 1));
 364                 }
 365                 if (firstChar > 0) {
 366                         CFStringDelete(newContentType, CFRangeMake(0, firstChar));
 367                 }
 368                 CFStringLowercase(newContentType, NULL);
 369                 return newContentType;
 370     }
 371     return NULL;
 372 }
 373
 374 /* REMINDSMZ: From CFURLResponse.c */
 375 static CFStringRef charsetFromContentTypeHeader(CFStringRef contentType) {
 376     // FIXME: Should this use KeyValuePair parsing to handle quoting properly?
 377     CFRange range;
 378     CFIndex compLen = CFStringGetLength(contentType);
 379     CFIndex start, end, idx;
 380     CFCharacterSetRef whitespaceSet;
 381     CFMutableStringRef result;
 382
 383         CFStringRef kCFURLResponseCharsetPrefix = CFSTR("charset=");
 384
 385     if (!CFStringFindWithOptions(contentType, kCFURLResponseCharsetPrefix, CFRangeMake(0, compLen), kCFCompareCaseInsensitive, &range) || range.length == 0) return NULL;
 386
 387     whitespaceSet = CFCharacterSetGetPredefined(kCFCharacterSetWhitespace);
 388     start = -1;
 389     end = -1;
 390     for (idx = range.location + range.length; idx < compLen; idx ++) {
 391                 UniChar ch = CFStringGetCharacterAtIndex(contentType, idx);
 392                 if (ch == ';' || ch == ',') break;
 393                 if (start == -1) {
 394                         if (!CFCharacterSetIsCharacterMember(whitespaceSet, ch)) {
 395                                 start = idx;
 396                                 end = idx;
 397                         }
 398                 } else if (!CFCharacterSetIsCharacterMember(whitespaceSet,ch)) {
 399                         end = idx;
 400                 }
 401     }
 402
 403     if (start == -1) return NULL;
 404
 405     result = CFStringCreateMutableCopy(CFGetAllocator(contentType), compLen,contentType);
 406     if (end != compLen) {
 407                 CFStringDelete(result, CFRangeMake(end+1, compLen-end-1));
 408     }
 409     CFStringDelete(result, CFRangeMake(0, start));
 410     CFStringLowercase(result, NULL);
 411     return result;
 412 }
 413
 414 #define STATIC_BUFFER_SIZE 1024
 415
 416 static BOOL isHexDigit(char c)
 417 {
 418     return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f');
 419 }
 420
 421 static UInt8 hexDigitValue(char c)
 422 {
 423     if (c >= '0' && c <= '9') {
 424         return c - '0';
 425     }
 426     if (c >= 'A' && c <= 'F') {
 427         return c - 'A' + 10;
 428     }
 429     if (c >= 'a' && c <= 'f') {
 430         return c - 'a' + 10;
 431     }
 432     // NSURL_ERROR("illegal hex digit");
 433     return 0;
 434 }
 435
 436 static CFDataRef percentEscapeDecodeBuffer(CFAllocatorRef alloc, const UInt8* srcBuffer, CFRange range, Boolean stripWhitespace)
 437 {
 438     UInt8* dstBuffer;
 439     UInt8 staticDstBuffer[STATIC_BUFFER_SIZE];
 440
 441     if (range.length > STATIC_BUFFER_SIZE) {
 442                 dstBuffer = (UInt8*) malloc(range.length);
 443     } else {
 444                 dstBuffer = staticDstBuffer;
 445     }
 446
 447     CFIndex end = range.location + range.length;
 448
 449     CFIndex i;
 450     CFIndex j;
 451     for (i = range.location, j = 0; i < end; ++i) {
 452                 char value;
 453
 454                 if (srcBuffer[i] == '%' && end > i + 2 && isHexDigit(srcBuffer[i+1]) && isHexDigit(srcBuffer[i+2])) {
 455                         value = hexDigitValue(srcBuffer[i+1]) * 16 + hexDigitValue(srcBuffer[i+2]);
 456                         i += 2;
 457                 } else {
 458                         value = srcBuffer[i];
 459                 }
 460
 461                 if (!stripWhitespace || !isspace(value)) {
 462                         dstBuffer[j++] = value;
 463                 }
 464     }
 465
 466     CFDataRef result = CFDataCreate(alloc, dstBuffer, j);
 467
 468     if (dstBuffer != staticDstBuffer) {
 469                 free(dstBuffer);
 470     }
 471
 472     return result;
 473 }
 474
 475
 476 // base 64 digits: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
 477
 478 static BOOL isBase64Digit(char c)
 479 {
 480     return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || (c == '+') || (c == '/');
 481 }
 482
 483 static BOOL isBase64DigitOrEqualSign(char c)
 484 {
 485     return isBase64Digit(c) || c == '=';
 486 }
 487
 488 static UInt8 base64DigitValue(char c)
 489 {
 490     if (c >= 'A' && c <= 'Z') {
 491                 return c - 'A';
 492     } else if (c >= 'a' && c <= 'z') {
 493                 return 26 + c - 'a';
 494     } else if (c >= '0' && c <= '9') {
 495                 return 52 + c - '0';
 496     } else if (c == '+') {
 497                 return 62;
 498     } else if (c == '/') {
 499                 return 63;
 500     } else {
 501                 return 0;
 502     }
 503 }
 504
 505 static CFDataRef base64DecodeData(CFAllocatorRef alloc, CFDataRef data)
 506 {
 507     const UInt8 *srcBuffer = CFDataGetBytePtr(data);
 508     CFIndex length = CFDataGetLength(data);
 509     UInt8 *dstBuffer = NULL;
 510     UInt8 staticDstBuffer[STATIC_BUFFER_SIZE];
 511         CFDataRef result = NULL;
 512
 513     // base64 encoded data length must be multiple of 4
 514     if (length % 4 != 0) {
 515                 goto done;
 516     }
 517
 518     if (length > STATIC_BUFFER_SIZE) {
 519                 dstBuffer = (UInt8*) malloc(length);
 520     } else {
 521                 dstBuffer = staticDstBuffer;
 522     }
 523
 524     CFIndex i;
 525     CFIndex j;
 526     for (i = 0, j = 0; i < length; i+=4) {
 527                 if (!(isBase64Digit(srcBuffer[i]) &&
 528                           isBase64Digit(srcBuffer[i+1]) &&
 529                           isBase64DigitOrEqualSign(srcBuffer[i+2]) &&
 530                           isBase64DigitOrEqualSign(srcBuffer[i+3]))) {
 531                         if (dstBuffer != staticDstBuffer) {
 532                                 free(dstBuffer);
 533                         }
 534                         return NULL;
 535                 }
 536
 537                 dstBuffer[j++] = (base64DigitValue(srcBuffer[i]) << 2) + (base64DigitValue(srcBuffer[i+1]) >> 4);
 538                 if (srcBuffer[i+2] != '=') {
 539                         dstBuffer[j++] = ((base64DigitValue(srcBuffer[i+1]) & 0xf) << 4) + (base64DigitValue(srcBuffer[i+2]) >> 2);
 540                 }
 541                 if (srcBuffer[i+3] != '=') {
 542                         dstBuffer[j++] = ((base64DigitValue(srcBuffer[i+2]) & 0x3) << 6) + (base64DigitValue(srcBuffer[i+3]));
 543                 }
 544     }
 545
 546     result = CFDataCreate(alloc, dstBuffer, j);
 547
 548 done:
 549     if (dstBuffer != staticDstBuffer) {
 550                 free(dstBuffer);
 551     }
 552
 553     return result;
 554 }
 555
 556 static inline CFStringRef percentExpandAndTrimContentType(CFAllocatorRef alloc, CFStringRef str, CFRange range)
 557 {
 558     CFMutableStringRef contentTypeHeader = NULL;
 559     CFStringRef contentTypeUnexpanded = CFStringCreateWithSubstring(alloc, str, range);
 560     CFStringRef contentTypeExpanded = CFURLCreateStringByReplacingPercentEscapes(alloc, contentTypeUnexpanded, CFSTR(""));
 561
 562     if (NULL == contentTypeExpanded) {
 563         contentTypeHeader = CFStringCreateMutableCopy(alloc, 0, contentTypeUnexpanded);
 564     } else {
 565         contentTypeHeader = CFStringCreateMutableCopy(alloc, 0, contentTypeExpanded);
 566         CFRelease(contentTypeExpanded);
 567     }
 568     CFRelease(contentTypeUnexpanded);
 569     CFStringTrimWhitespace(contentTypeHeader);
 570
 571     return contentTypeHeader;
 572 }
 573
 574 static Boolean parseDataRequestURL(CFURLRef url, CFDataRef* outData, CFStringRef* outMimeType, CFStringRef* outTextEncodingName)
 575 {
 576     Boolean result = FALSE;
 577     CFAllocatorRef alloc = CFGetAllocator(url);
 578     CFStringRef str = CFURLCopyResourceSpecifier(url);
 579     if (str != NULL) {
 580                 CFRange commaRange = CFStringFind(str, CFSTR(","), 0);
 581
 582                 if (commaRange.location != kCFNotFound) {
 583                         CFStringRef contentTypeHeader = percentExpandAndTrimContentType(alloc, str, CFRangeMake(0, commaRange.location));
 584                         CFStringRef mimeType = mimeTypeFromContentTypeComponent(contentTypeHeader);
 585                         CFStringRef textEncodingName = charsetFromContentTypeHeader(contentTypeHeader);
 586
 587                         Boolean base64 = CFStringFind(contentTypeHeader, CFSTR(";base64"), kCFCompareCaseInsensitive).location != kCFNotFound;
 588
 589                         if (mimeType == NULL) {
 590                                 mimeType = (CFStringRef) CFRetain(CFSTR("text/plain"));
 591                         }
 592
 593                         CFIndex bufferSize = CFURLGetBytes(url, NULL, 0);
 594                         UInt8* srcBuffer = (UInt8*) malloc(bufferSize);
 595                         CFURLGetBytes(url, srcBuffer, bufferSize);
 596
 597                         CFRange dataRange = CFURLGetByteRangeForComponent(url, kCFURLComponentResourceSpecifier, NULL);
 598                         while (srcBuffer[dataRange.location] != ',') {
 599                                 dataRange.location++;
 600                                 dataRange.length--;
 601                         }
 602                         dataRange.location++;
 603                         dataRange.length--;
 604
 605                         CFDataRef dataRef = NULL;
 606
 607                         if (! base64) {
 608                                 dataRef = percentEscapeDecodeBuffer(alloc, srcBuffer, dataRange, false);
 609                         } else {
 610                                 CFDataRef unescapedAndStripped = percentEscapeDecodeBuffer(alloc, srcBuffer, dataRange, true);
 611                                 if (unescapedAndStripped) {
 612                                         dataRef = base64DecodeData(alloc, unescapedAndStripped);
 613                                         CFRelease(unescapedAndStripped);
 614                                 }
 615                         }
 616
 617                         if (dataRef != NULL)  {
 618                                 *outData = dataRef;
 619                                 *outMimeType = (CFStringRef) mimeType == NULL? NULL : CFStringCreateCopy(alloc, mimeType);
 620                                 *outTextEncodingName = (CFStringRef) textEncodingName == NULL? NULL : CFStringCreateCopy(alloc, textEncodingName);
 621                                 result = true;
 622                         }
 623
 624                         free(srcBuffer);
 625
 626                         if (contentTypeHeader) CFRelease(contentTypeHeader);
 627                         if (mimeType) CFRelease(mimeType);
 628                         if (textEncodingName) CFRelease(textEncodingName);
 629                 }
 630
 631                 CFRelease(str);
 632     }
 633
 634     return result;
 635 }
 636
 637 static Boolean _CFDataURLCreateDataAndPropertiesFromResource(CFAllocatorRef alloc, CFURLRef url, CFDataRef *fetchedData, CFArrayRef desiredProperties, CFDictionaryRef *fetchedProperties, SInt32 *errorCode) {
 638     Boolean success = true;
 639
 640     if (errorCode) *errorCode = 0;
 641
 642         // We always need to fetch the data...
 643         CFDataRef data = NULL;
 644         CFStringRef mimeType = NULL;
 645         CFStringRef textEncodingName = NULL;
 646
 647         if (! parseDataRequestURL(url, &data, &mimeType, &textEncodingName)) {
 648                 if (errorCode)
 649                         *errorCode = kCFURLUnknownError;
 650                 *fetchedData = NULL;
 651                 success = false;
 652         } else {
 653                 if (fetchedData) {
 654                         *fetchedData = CFDataCreateCopy(alloc, data);
 655                 }
 656
 657                 if (fetchedProperties) {
 658                         const void* propKeys[] = {
 659                                 kCFDataURLDataLength,
 660                                 kCFDataURLMimeType,
 661                                 kCFDataURLTextEncodingName,
 662                         };
 663                         const CFIndex propKeysCount = sizeof(propKeys) / sizeof(propKeys[0]);
 664
 665                         if (desiredProperties == NULL) {
 666                                 static CFArrayRef sAllProps = NULL;
 667                                 if (sAllProps == NULL) {
 668                                         sAllProps = CFArrayCreate(kCFAllocatorSystemDefault, propKeys, propKeysCount, &kCFTypeArrayCallBacks);
 669                                 }
 670                                 desiredProperties = sAllProps;
 671                         }
 672
 673                         const void* vals[propKeysCount];
 674                         const void* keys[propKeysCount];
 675                         int ixVal = 0;
 676
 677                         CFIndex count = CFArrayGetCount(desiredProperties);
 678                         for (CFIndex i = 0;  i < count;  i++) {
 679                                 CFStringRef key = (CFStringRef) CFArrayGetValueAtIndex(desiredProperties, i);
 680
 681                                 if (CFEqual(key, kCFDataURLDataLength)) {
 682                                         CFIndex len = CFDataGetLength(data);
 683                                         keys[ixVal] = key;
 684                                         vals[ixVal++] = CFNumberCreate(alloc, kCFNumberCFIndexType, &len);
 685                                 } else if (CFEqual(key, kCFDataURLMimeType)) {
 686                                         if (mimeType != NULL) {
 687                                                 keys[ixVal] = key;
 688                                                 vals[ixVal++] = CFStringCreateCopy(alloc, mimeType);
 689                                         }
 690                                 } else if (CFEqual(key, kCFDataURLTextEncodingName)) {
 691                                         if (textEncodingName != NULL) {
 692                                                 keys[ixVal] = key;
 693                                                 vals[ixVal++] = CFStringCreateCopy(alloc, textEncodingName);
 694                                         }
 695                                 }
 696                         }
 697
 698                         *fetchedProperties = CFDictionaryCreate(alloc, keys, vals, ixVal, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
 699                         for (CFIndex i = 0;  i < ixVal; i++)
 700                                 CFRelease(vals[i]);
 701                         if (*fetchedProperties == NULL)
 702                                 success = false;
 703                 }
 704
 705                 if (data) CFRelease(data);
 706                 if (mimeType) CFRelease(mimeType);
 707                 if (textEncodingName) CFRelease(textEncodingName);
 708     }
 709
 710
 711     return success;
 712 }
 713
 714 /*************************/
 715 /* Public routines       */
 716 /*************************/
 717
 718 Boolean CFURLCreateDataAndPropertiesFromResource(CFAllocatorRef alloc, CFURLRef url, CFDataRef *fetchedData, CFDictionaryRef *fetchedProperties, CFArrayRef desiredProperties, SInt32 *errorCode) {
 719     CFStringRef scheme = CFURLCopyScheme(url);
 720
 721     if (!scheme) {
 722         if (errorCode) *errorCode = kCFURLImproperArgumentsError;
 723         if (fetchedData) *fetchedData = NULL;
 724         if (fetchedProperties) *fetchedProperties = NULL;
 725         return false;
 726     } else {
 727         Boolean result;
 728         if (CFStringCompare(scheme, CFSTR("file"), kCFCompareCaseInsensitive) == kCFCompareEqualTo) {
 729             result = _CFFileURLCreateDataAndPropertiesFromResource(alloc, url, fetchedData, desiredProperties, fetchedProperties, errorCode);
 730         } else if (CFStringCompare(scheme, CFSTR("data"), kCFCompareCaseInsensitive) == kCFCompareEqualTo) {
 731             result = _CFDataURLCreateDataAndPropertiesFromResource(alloc, url, fetchedData, desiredProperties, fetchedProperties, errorCode);
 732         } else {
 733 #if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
 734             result = __CFNetwork__CFURLCreateDataAndPropertiesFromResource(alloc, url, fetchedData, fetchedProperties, desiredProperties, errorCode);
 735 #else
 736             if (fetchedData) *fetchedData = NULL;
 737             if (fetchedProperties) *fetchedProperties = NULL;
 738             if (errorCode) *errorCode = kCFURLUnknownSchemeError;
 739             result = false;
 740 #endif
 741         }
 742         CFRelease(scheme);
 743         return result;
 744     }
 745 }
 746
 747 CFTypeRef CFURLCreatePropertyFromResource(CFAllocatorRef alloc, CFURLRef url, CFStringRef property, SInt32 *errorCode) {
 748     CFArrayRef array = CFArrayCreate(alloc, (const void **)&property, 1, &kCFTypeArrayCallBacks);
 749     CFDictionaryRef dict;
 750
 751     if (CFURLCreateDataAndPropertiesFromResource(alloc, url, NULL, &dict, array, errorCode)) {
 752         CFTypeRef result = CFDictionaryGetValue(dict, property);
 753         if (result) CFRetain(result);
 754         CFRelease(array);
 755         CFRelease(dict);
 756         return result;
 757     } else {
 758         if (dict) CFRelease(dict);
 759         CFRelease(array);
 760         return NULL;
 761     }
 762 }
 763
 764 Boolean CFURLWriteDataAndPropertiesToResource(CFURLRef url, CFDataRef data, CFDictionaryRef propertyDict, SInt32 *errorCode) {
 765     CFStringRef scheme = CFURLCopyScheme(url);
 766     if (!scheme) {
 767         if (errorCode) *errorCode = kCFURLImproperArgumentsError;
 768         return false;
 769     } else if (CFStringCompare(scheme, CFSTR("file"), 0) == kCFCompareEqualTo) {
 770         Boolean success = true;
 771         CFRelease(scheme);
 772         if (errorCode) *errorCode = 0;
 773         if (data) {
 774             if (CFURLHasDirectoryPath(url)) {
 775                 // Create a directory
 776                 char cPath[CFMaxPathSize];
 777                 if (!CFURLGetFileSystemRepresentation(url, true, (unsigned char *)cPath, CFMaxPathSize))
 778                 {
 779                     if (errorCode) *errorCode = kCFURLImproperArgumentsError;
 780                     success = false;
 781                 } else {
 782                     success = _CFCreateDirectory(cPath);
 783                     if (!success && errorCode) *errorCode = kCFURLUnknownError;
 784                 }
 785             } else {
 786                // Write data
 787                 SInt32 length = CFDataGetLength(data);
 788                 const void *bytes = (0 == length) ? (const void *)"" : CFDataGetBytePtr(data);
 789                 success = _CFWriteBytesToFile(url, bytes, length);
 790                 if (!success && errorCode) *errorCode = kCFURLUnknownError;
 791             }
 792         }
 793         if (propertyDict) {
 794             if (!_CFFileURLWritePropertiesToResource(url, propertyDict, errorCode))
 795                 success = false;
 796         }
 797         return success;
 798     } else {
 799         CFRelease(scheme);
 800 #if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
 801         Boolean result = __CFNetwork__CFURLWriteDataAndPropertiesToResource(url, data, propertyDict, errorCode);
 802         if (!result) {
 803             if (errorCode) *errorCode = kCFURLUnknownSchemeError;
 804         }
 805         return result;
 806 #else
 807         if (errorCode) *errorCode = kCFURLUnknownSchemeError;
 808         return false;
 809 #endif
 810     }
 811 }
 812
 813 Boolean CFURLDestroyResource(CFURLRef url, SInt32 *errorCode) {
 814     CFStringRef scheme = CFURLCopyScheme(url);
 815     char cPath[CFMaxPathSize];
 816
 817     if (!scheme) {
 818         if (errorCode) *errorCode = kCFURLImproperArgumentsError;
 819         return false;
 820     } else if (CFStringCompare(scheme, CFSTR("file"), 0) == kCFCompareEqualTo) {
 821         CFRelease(scheme);
 822         if (!CFURLGetFileSystemRepresentation(url, true, (unsigned char *)cPath, CFMaxPathSize)) {
 823             if (errorCode) *errorCode = kCFURLImproperArgumentsError;
 824             return false;
 825         }
 826
 827         if (CFURLHasDirectoryPath(url)) {
 828             if (_CFRemoveDirectory(cPath)) {
 829                 if (errorCode) *errorCode = 0;
 830                 return true;
 831             } else {
 832                 if (errorCode) *errorCode = kCFURLUnknownError;
 833                 return false;
 834             }
 835         } else {
 836             if (_CFDeleteFile(cPath)) {
 837                 if (errorCode) *errorCode = 0;
 838                 return true;
 839             } else {
 840                 if (errorCode) *errorCode = kCFURLUnknownError;
 841                 return false;
 842             }
 843         }
 844     } else {
 845         CFRelease(scheme);
 846 #if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
 847         Boolean result = __CFNetwork__CFURLDestroyResource(url, errorCode);
 848         if (!result) {
 849             if (errorCode) *errorCode = kCFURLUnknownSchemeError;
 850         }
 851         return result;
 852 #else
 853         if (errorCode) *errorCode = kCFURLUnknownSchemeError;
 854         return false;
 855 #endif
 856     }
 857 }
 858 #pragma GCC diagnostic pop
 859
 860