Loading AI tools
文件格式 来自维基百科,自由的百科全书
.IPA后缀的文件是iOS和iPadOS的应用程序存档文件,全称为iPhone application archive(iPhone应用存档)[来源请求]。通常情况下,IPA文件都是使用苹果公司的FairPlayDRM技术进行加密保护的二进制文件,可以通过IPA砸壳的方式移除加密保护来对IPA文件进行一些修改。每个IPA文件都是ARM架构的可执行文件以及该应用的资源文件的打包文件,只能安装在iPhone、iPod Touch、iPad以及使用Apple Silicon平台的Mac上。文件可通过修改后缀为zip进行解压缩,并查看其内容。
大多数.ipa文件无法安装在iPhone模拟器,因为不含用于x86架构的二进制文件,只有用于手机和平板电脑的ARM架构。[1]要在模拟器运行应用程序,需要使用Xcode软件开发工具包打开原始项目文件。但通过提取和复制实体数据文件夹的.app文件,可在模拟器上打开一些.ipa文件。一些简单的应用程序可通过这种方法在模拟器运行。
IPA文件是Apple“事实上的”格式。格式存在一种数字版权管理形式,用于控制对单个Apple ID重新分发。[2]在iTunes 12.7(2017年9月)之前,用户可直接访问表单的IPA文件App Store下载量。[3]
IPA具有供iTunes和App Store识别的内置结构。 下面的示例显示了IPA的结构:[4]
/Payload/ /Payload/Application.app/ /iTunesArtwork /iTunesArtwork@2x /iTunesMetadata.plist /WatchKitSupport/WK /META-INF
如上所示,实体数据文件夹包含所有应用程序数据。iTunes Artwork文件是一个512×512像素的PNG图像,包含用于在iTunes显示的应用程序图标和iPad的App Store应用程序。iTunesMetadata.plist包含各种信息,包括开发者名称、ID、捆绑包标识符、版权信息、流派、应用程序名称、发布日期、购买日期等。
It is common but undocumented to use a JPEG file for .[5]
自 2017 年以来,Apple 在 IPA 中使用 LZFSE 而不是注册 Zip 算法。本例中的“压缩方法”字段设置为 99。 Since 2017, Apple has used LZFSE instead of registered Zip algorithms in IPAs. The "compression method" field in this case is set to 99.[6]
Code signing is handled in the .app bundle directory. The META-INF folder only contains metadata about what program was used to create the IPA.[7]
An unsigned .ipa can be created by copying the folder with the extension .app from the Products folder of the application in Xcode to a folder called Payload and compressing the latter using the command zip -0 -y -r myAppName.ipa Payload/
.
It is then possible to install unsigned .ipa files on iOS jailbroken devices using third party software. AppSync is the tool for installing such homebrew apps. Similar to the case of game console hacking, people are known to use this installation for piracy, against the tool developer's wishes:[8] some underground communities form around buying an app and then sharing its DRM-free unsigned version.
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.