| commit | 7bb67edab98478d1768c41eebd5eea985d83e500 | [log] [tgz] |
|---|---|---|
| author | Alex Klyubin <klyubin@google.com> | Tue Dec 20 10:09:53 2016 -0800 |
| committer | Alex Klyubin <klyubin@google.com> | Tue Dec 20 10:09:53 2016 -0800 |
| tree | acf32a22c85ee306668b9b5ec75cbef7efb5e853 | |
| parent | 8fc20dbfec256c79b5893c012307d6e225ccad57 [diff] |
Add --in option to apksigner This lets the user specify the APK being signed using --in option instead of as the very last parameter on the command-line. For symmetry reasons, apksigner verify command now also supports --in. The original method of specifying the APK as the very last parameter remains supported. The reason for this change is that when --out option is used, prior to this change, the command-line is harder to understand because the output file precedes the input file (specified as the very last parameter) and because it's not immediately clear from looking at the command-line what the input file is: PRIOR TO THIS CHANGE $ apksigner sign --ks .. --out app.apk app-unsigned.apk AFTER THIS CHANGE $ apksigner sign --ks .. --in app-unsigned.apk --out app.apk Test: apksigner sign --ks test.ks app.apk Test: apksigner sign --ks test.ks --in app.apk --out app2.apk Test: apksigner verify app.apk Test: apksigner verify --in app.apk Test: apksigner verify --in app.apk --print-certs Change-Id: I753fbc234d426621717beea7179384cf15236fdf
apksig is a project which aims to simplify APK signing and checking whether APK's signatures should verify on Android. apksig supports JAR signing (used by Android since day one) and APK Signature Scheme v2 (supported since Android Nougat, API Level 24).
The key feature of apksig is that it knows about differences in APK signature verification logic between different versions of the Android platform. apksig can thus check whether a signed APK is expected to verify on all Android platform versions supported by the APK. When signing an APK, apksig will choose the most appropriate cryptographic algorithms based on the Android platform versions supported by the APK being signed.
The project consists of two subprojects:
apksig library offers three primitives:
ApkSigner which signs the provided APK so that it verifies on all Android platform versions supported by the APK. The range of platform versions can be customized if necessary.ApkVerifier which checks whether the provided APK is expected to verify on all Android platform versions supported by the APK. The range of platform versions can be customized if necessary.(Default)ApkSignerEngine which abstracts away signing an APK from parsing and building an APK file. This is useful in optimized APK building pipelines, such as in Android Plugin for Gradle, which need to perform signing while building an APK, instead of after. For simpler use cases where the APK to be signed is available upfront, the ApkSigner above is easier to use.NOTE: Some public classes of the library are in packages having the word “internal” in their name. These are not public API of the library. Do not use *.internal.* classes directly.
apksigner command-line tool offers two operations:
apksigner sign for usage information.apksigner verify for usage information.The tool determines the range of Android platform versions (API Levels) supported by the APK by inspecting the APK's AndroidManifest.xml. This behavior can be overridden by specifying the range of platform versions on the command-line.