How to fix Algorithm HmacPBESHA256 not available when building app bundle


In this article, I'll share with you how I fixed a failed flutter build app bundle command.

When I ran flutter build app bundle in my terminal I got the below error.

Execution failed for task ':app:signReleaseBundle'.
> A failure occurred while executing$BundleToolRunnable
   > Failed to read key upload from store "/Users/<your folder name>/upload-keystore.jks": Integrity check failed: Algorithm HmacPBESHA256 not available

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.

* Get more help at



The likely cause of this error is that the Java version the app is built with is different from the Java version being used to generate the signing key.

To fix run

Run flutter doctor -v
[✓] Android toolchain - develop for Android devices (Android SDK version
    • Android SDK at /Users/<your folder path>/Library/Android/sdk
    • Platform android-33, build-tools 34.0.0-rc2
    • Java binary at: /Applications/Android
    • Java version OpenJDK Runtime Environment (build 11.0.11+0-b60-7772763)
    • All Android licenses accepted.


Prefix the keygen command to point to the Java version used to build your app and run your keygen command as shown below.

/Applications/"Android"/Contents/jre/jdk/Contents/Home/bin/keytool -genkey -v -keystore ~/upload-keystore.jks -keyalg RSA -keysize 2048 -validity 10000 -alias upload

Run flutter build appbundle and your build will be successful

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