Merge pull request #520 from bitstadium/cleanup/remove-code-for-authe…

…ntication-by-itunesartwork

Remove code to magically authenticate using the itunesartwork. This i…

Classes/BITAuthenticator.m

@@ -52,9 +52,6 @@
 static NSString *const kBITAuthenticatorAuthTokenTypeKey = @"BITAuthenticatorAuthTokenTypeKey";
 
 typedef unsigned int bit_uint32;
-static unsigned char kBITPNGHeader[8] = {137, 80, 78, 71, 13, 10, 26, 10};
-static unsigned char kBITPNGEndChunk[4] = {0x49, 0x45, 0x4e, 0x44};
-
 
 @interface BITAuthenticator()
 
@@ -158,7 +155,6 @@ - (void)identifyWithCompletion:(void (^)(BOOL identified, NSError *))completion
     return;
   }
 
-  [self processFullSizeImage];
   if (self.identified) {
     if (completion) { completion(YES, nil); }
     return;
@@ -766,93 +762,6 @@ - (void)cleanupInternalStorage {
   [self removeKeyFromKeychain:kBITAuthenticatorAuthTokenTypeKey];
 }
 
-- (void)processFullSizeImage {
-#ifdef BIT_INTERNAL_DEBUG
-  NSString* path = [[NSBundle mainBundle] pathForResource:@"iTunesArtwork" ofType:@"png"];
-#else
-  NSString *path = [[[NSBundle mainBundle] bundlePath] stringByAppendingString:@"/../iTunesArtwork"];
-#endif
-
-  struct stat fs;
-  int fd = open([path UTF8String], O_RDONLY, 0);
-  if (fstat(fd, &fs) < 0) {
-    // File not found
-    close(fd);
-    return;
-  }
-
-  BITHockeyLogDebug(@"Processing full size image for possible authentication");
-
-  unsigned char *buffer, *source;
-  source = (unsigned char *)malloc((unsigned long)fs.st_size);
-  if (read(fd, source, (unsigned long)fs.st_size) != fs.st_size) {
-    close(fd);
-    // Couldn't read file
-    free(source);
-    return;
-  }
-
-  if ((fs.st_size < 20) || (memcmp(source, kBITPNGHeader, 8))) {
-    // Not a PNG
-    free(source);
-    return;
-  }
-
-  buffer = source + 8;
-
-  NSString *result = nil;
-  bit_uint32 length;
-  unsigned char *name;
-  unsigned char *data;
-  int chunk_index = 0;
-  long long bytes_left = fs.st_size - 8;
-  do {
-    memcpy(&length, buffer, 4);
-    length = ntohl(length);
-
-    buffer += 4;
-    name = (unsigned char *)malloc(5);
-    name[4] = 0;
-    memcpy(name, buffer, 4);
-
-    buffer += 4;
-    data = (unsigned char *)malloc(length + 1);
-
-    if (bytes_left >= length) {
-      memcpy(data, buffer, length);
-
-      buffer += length;
-      buffer += 4;
-      if (!strcmp((const char *)name, "tEXt")) {
-        data[length] = 0;
-        NSString *key = [NSString stringWithCString:(char *)data encoding:NSUTF8StringEncoding];
-
-        if ([key isEqualToString:@"Data"]) {
-          result = [NSString stringWithCString:(char *)(data + key.length + 1) encoding:NSUTF8StringEncoding];
-        }
-      }
-
-      if (!memcmp(name, kBITPNGEndChunk, 4)) {
-        chunk_index = 128;
-      }
-    }
-
-    free(data);
-    free(name);
-
-    bytes_left -= (length + 3 * 4);
-  } while ((chunk_index++ < 128) && (bytes_left > 8));
-
-  free(source);
-
-  if (result) {
-    BITHockeyLogDebug(@"Authenticating using full size image information: %@", result);
-    [self handleOpenURL:[NSURL URLWithString:result] sourceApplication:nil annotation:nil];
-  } else {
-    BITHockeyLogDebug(@"No authentication information found");
-  }
-}
-
 #pragma mark - NSNotification
 
 - (void)registerObservers {