如何加密iOS中的mp3文件 [英] How to Encrypt mp3 Files in iOS

问题描述

我有一个应用程序从我们的Web服务器下载MP3文件，并立即将它们存储在NSData对象中。然后将该对象写入存储在应用程序沙箱中的/ Library / Cache文件夹中的.mp3文件。

当播放文件时，我加载转换成AVPlayerItem，如下所示：

  NSString * filePath = [[NSSearchPathForDirectoriesInDomains（NSCachesDirectory，NSUserDomainMask，YES）objectAtIndex：0] 
 stringByAppendingPathComponent：[NSString stringWithFormat：@％@。mp3，trackID]]; 
 
 NSURL * fileURL = [[NSURL alloc] initFileURLWithPath：filePath]; 
 self.trackPlayerItem = [[AVPlayerItem alloc] initWithURL：fileURL]; 
  

我想继续将该项目加载到AVPlayer并播放。

所以我的主要问题是：我们如何在这些mp3文件存储在磁盘上时加密，以确保他们不能被任何拥有越狱设备的人从文件系统中拔出？ / p>

我已经看过Stack Overflow，但找不到有用的东西。

希望有人可以帮助我出来谢谢

解决方案

查看 NSData 中的-encrypt-nsdata-with-private-key-and-decrypt-with-public-key>此线程。

I have an app that downloads MP3 files from our web server and momentarily stores them in an NSData object. This object is then written to a .mp3 file stored to the /Library/Cache folder in the app's sandbox.

When it is time to play the file, I load it into an AVPlayerItem like so:

    NSString *filePath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0]
                          stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mp3", trackID]];

    NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:filePath];
    self.trackPlayerItem = [[AVPlayerItem alloc] initWithURL:fileURL];

I think proceed to load this item into an AVPlayer and play it.

So my main question is: How do I encrypt these mp3 files while they're stored on the disk to ensure they can't just be plucked from the file system by anyone with a Jailbroken device?

I've already looked on Stack Overflow but couldn't find anything that helped.

Hope someone can help me out. Thanks

解决方案

Check out this thread on adding RSA encryption/decryption to NSData.

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