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Difference between revisions of "IPA File Format"
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m (Changed some language around to make it sound less like a password-protected ZIP.) |
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[[Image:IPAFile.png|thumb|IPA File Icon in ''Preview'']] |
[[Image:IPAFile.png|thumb|IPA File Icon in ''Preview'']] |
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| − | A IPA file is an '''iPhone Application''' archive which stores an iPhone, or iPad application. Looking at the file signature (Magic Number) of a valid IPA File will yield ''50 4B 03 04'' in HEX or ''PK..'' in ASCII, this shows us that an IPA file is just a fancy ZIP file and can therefore be extracted by the same way a ZIP file would. |
+ | A IPA file is an '''iPhone Application''' archive which stores an iPhone, or iPad application. Looking at the file signature (Magic Number) of a valid IPA File will yield ''50 4B 03 04'' in HEX or ''PK..'' in ASCII, this shows us that an IPA file is just a fancy ZIP file and can therefore be extracted by the same way a ZIP file would. Though any computer can extract an IPA's contents, the app's binary uses DRM that hinders users' ability to examine or redistribute the app. |
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== Use == |
== Use == |
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| − | Apple uses the IPA format for [[iOS]] |
+ | Apple uses the IPA format for [[iOS]] applications in iTunes. Developers use the IPA format typically for Ad Hoc Distribution of apps to beta testers, IPAs can be created through [[Xcode]]. This requires an Apple Developer or Enterprise account if you want to distribute to non-[[Jailbreak|jailbroken]] devices. |
== How to create == |
== How to create == |
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IPAs can be created either by hand or through [[Xcode|Xcode's]] Product -> Archive (this requires an App Developer or Enterprise account) and can later be viewed through Organizer -> Archives. To create an IPA hand, build your application and locate the .app file for it. Create a root folder, inside this folder create another folder called 'Payload' and place your application in here. Next, create a 512x512 image for your icon, call it iTunesArtwork and place it in the root folder. Create an [[iTunesMetadata.plist]] file and place it in the root folder as well. ZIP the contents of the root folder and not the root folder itself, i.e. select the items inside the root folder and '''not''' the root folder itself. Use the following ZIP command to properly create IPA files; |
IPAs can be created either by hand or through [[Xcode|Xcode's]] Product -> Archive (this requires an App Developer or Enterprise account) and can later be viewed through Organizer -> Archives. To create an IPA hand, build your application and locate the .app file for it. Create a root folder, inside this folder create another folder called 'Payload' and place your application in here. Next, create a 512x512 image for your icon, call it iTunesArtwork and place it in the root folder. Create an [[iTunesMetadata.plist]] file and place it in the root folder as well. ZIP the contents of the root folder and not the root folder itself, i.e. select the items inside the root folder and '''not''' the root folder itself. Use the following ZIP command to properly create IPA files; |
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| + | zip -u -y -r -n .jpg:.JPG:.jpeg:.png:.PNG:.gif:.GIF:.Z:.gz:.zip:.zoo:.arc:.lzh:.rar:.arj:.mp3:.mp4:.m4a:.m4v:.ogg:.ogv:.avi:.flac:.aac ''IPAFileName.ipa'' ''./*'' |
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| − | <code>zip -u -y -r -n .jpg:.JPG:.jpeg:.png:.PNG:.gif:.GIF:.Z:.gz:.zip:.zoo:.arc:.lzh:.rar:.arj:.mp3:.mp4:.m4a:.m4v:.ogg:.ogv:.avi:.flac:.aac ''IPAFileName.ipa'' ''./*''</code> |
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Revision as of 16:32, 21 March 2013
A IPA file is an iPhone Application archive which stores an iPhone, or iPad application. Looking at the file signature (Magic Number) of a valid IPA File will yield 50 4B 03 04 in HEX or PK.. in ASCII, this shows us that an IPA file is just a fancy ZIP file and can therefore be extracted by the same way a ZIP file would. Though any computer can extract an IPA's contents, the app's binary uses DRM that hinders users' ability to examine or redistribute the app.
Structure
The basic structure of an IPA file is as follows;
- /iTunesArtwork
- /iTunesMetadata.plist
- /Payload/
- ApplicationName.app/
- ApplicationName
- Various other application files
- ApplicationName.app/
Use
Apple uses the IPA format for iOS applications in iTunes. Developers use the IPA format typically for Ad Hoc Distribution of apps to beta testers, IPAs can be created through Xcode. This requires an Apple Developer or Enterprise account if you want to distribute to non-jailbroken devices.
How to create
IPAs can be created either by hand or through Xcode's Product -> Archive (this requires an App Developer or Enterprise account) and can later be viewed through Organizer -> Archives. To create an IPA hand, build your application and locate the .app file for it. Create a root folder, inside this folder create another folder called 'Payload' and place your application in here. Next, create a 512x512 image for your icon, call it iTunesArtwork and place it in the root folder. Create an iTunesMetadata.plist file and place it in the root folder as well. ZIP the contents of the root folder and not the root folder itself, i.e. select the items inside the root folder and not the root folder itself. Use the following ZIP command to properly create IPA files;
zip -u -y -r -n .jpg:.JPG:.jpeg:.png:.PNG:.gif:.GIF:.Z:.gz:.zip:.zoo:.arc:.lzh:.rar:.arj:.mp3:.mp4:.m4a:.m4v:.ogg:.ogv:.avi:.flac:.aac IPAFileName.ipa ./*
