I just posted a longer explanation on your blog, but here is log if at all helpful. Thanks!

09-10 08:08:01.346: I/ActivityManager(59): Displayed activity org.nick.androidkeystore/.KeystoreActivity: 445 ms (total 445 ms)
09-10 08:08:01.466: I/keystore(36): uid: 10051 action: t -> 1 state: 1 -> 1 retry: 4
09-10 08:08:01.466: I/keystore(36): uid: 10051 action: t -> 1 state: 1 -> 1 retry: 4
09-10 08:08:01.596: D/KeystoreActivity(4894): Keystore state: UNLOCKED
09-10 08:08:01.706: I/keystore(36): uid: 10051 action: s -> 1 state: 1 -> 1 retry: 4
09-10 08:08:01.716: I/keystore(36): uid: 10051 action: t -> 1 state: 1 -> 1 retry: 4
09-10 08:08:01.716: D/KeystoreActivity(4894): Keys: 
09-10 08:08:01.726: I/keystore(36): uid: 10051 action: g -> 1 state: 1 -> 1 retry: 4
09-10 08:08:01.726: D/KeystoreActivity(4894):   test_key1: -8825863414354876680663630784384295312183551205364498841532107818494149774506
09-10 08:08:01.736: I/keystore(36): uid: 10051 action: g -> 1 state: 1 -> 1 retry: 4
09-10 08:08:01.736: D/KeystoreActivity(4894):   test_key0: -19378007423384393247659212638159071070138594974322013632346596321676577597408
09-10 08:08:01.825: W/dalvikvm(4894): threadid=12: thread exiting with uncaught exception (group=0x4001d800)
09-10 08:08:01.885: E/AndroidRuntime(4894): FATAL EXCEPTION: AsyncTask #5
09-10 08:08:01.885: E/AndroidRuntime(4894): java.lang.RuntimeException: An error occured while executing doInBackground()
09-10 08:08:01.885: E/AndroidRuntime(4894):     at android.os.AsyncTask$3.done(AsyncTask.java:200)
09-10 08:08:01.885: E/AndroidRuntime(4894):     at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
09-10 08:08:01.885: E/AndroidRuntime(4894):     at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
09-10 08:08:01.885: E/AndroidRuntime(4894):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
09-10 08:08:01.885: E/AndroidRuntime(4894):     at java.util.concurrent.FutureTask.run(FutureTask.java:137)
09-10 08:08:01.885: E/AndroidRuntime(4894):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
09-10 08:08:01.885: E/AndroidRuntime(4894):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
09-10 08:08:01.885: E/AndroidRuntime(4894):     at java.lang.Thread.run(Thread.java:1096)
09-10 08:08:01.885: E/AndroidRuntime(4894): Caused by: java.lang.AssertionError: 1
09-10 08:08:01.885: E/AndroidRuntime(4894):     at org.nick.androidkeystore.android.security.KeyStore.state(KeyStore.java:75)
09-10 08:08:01.885: E/AndroidRuntime(4894):     at org.nick.androidkeystore.KeystoreActivity$1.doWork(KeystoreActivity.java:139)
09-10 08:08:01.885: E/AndroidRuntime(4894):     at org.nick.androidkeystore.KeystoreActivity$KeystoreTask.doInBackground(KeystoreActivity.java:96)
09-10 08:08:01.885: E/AndroidRuntime(4894):     at org.nick.androidkeystore.KeystoreActivity$KeystoreTask.doInBackground(KeystoreActivity.java:1)
09-10 08:08:01.885: E/AndroidRuntime(4894):     at android.os.AsyncTask$2.call(AsyncTask.java:185)
09-10 08:08:01.885: E/AndroidRuntime(4894):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
09-10 08:08:01.885: E/AndroidRuntime(4894):     ... 4 more
09-10 08:08:01.905: W/ActivityManager(59):   Force finishing activity org.nick.androidkeystore/.KeystoreActivity

...

09-10 08:18:08.966: I/ActivityManager(59): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=org.nick.androidkeystore/.KeystoreActivity }
09-10 08:18:09.166: I/keystore(36): uid: 10051 action: t -> 1 state: 1 -> 1 retry: 4
09-10 08:18:09.206: I/keystore(36): uid: 10051 action: t -> 1 state: 1 -> 1 retry: 4
09-10 08:18:09.206: I/keystore(36): uid: 10051 action: t -> 1 state: 1 -> 1 retry: 4
09-10 08:18:09.246: D/KeystoreActivity(27660): Keystore state: UNLOCKED
09-10 08:18:09.435: I/keystore(36): uid: 10051 action: t -> 1 state: 1 -> 1 retry: 4
09-10 08:18:09.475: I/keystore(36): uid: 10051 action: s -> 1 state: 1 -> 1 retry: 4
09-10 08:18:09.495: D/KeystoreActivity(27660): Keys: 
09-10 08:18:09.495: I/keystore(36): uid: 10051 action: g -> 1 state: 1 -> 1 retry: 4
09-10 08:18:09.505: D/KeystoreActivity(27660):  test_key1: -48453358114406951772358788725542992193076986772767435236646674819192049096916
09-10 08:18:09.505: I/keystore(36): uid: 10051 action: g -> 1 state: 1 -> 1 retry: 4
09-10 08:18:09.505: D/KeystoreActivity(27660):  test_key0: 12715778555170410776424802206206477859550137287931188221243440516653640148217
09-10 08:18:09.625: W/dalvikvm(27660): threadid=7: thread exiting with uncaught exception (group=0x4001d800)
09-10 08:18:09.655: E/AndroidRuntime(27660): FATAL EXCEPTION: AsyncTask #1
09-10 08:18:09.655: E/AndroidRuntime(27660): java.lang.RuntimeException: An error occured while executing doInBackground()
09-10 08:18:09.655: E/AndroidRuntime(27660):    at android.os.AsyncTask$3.done(AsyncTask.java:200)
09-10 08:18:09.655: E/AndroidRuntime(27660):    at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
09-10 08:18:09.655: E/AndroidRuntime(27660):    at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
09-10 08:18:09.655: E/AndroidRuntime(27660):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
09-10 08:18:09.655: E/AndroidRuntime(27660):    at java.util.concurrent.FutureTask.run(FutureTask.java:137)
09-10 08:18:09.655: E/AndroidRuntime(27660):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
09-10 08:18:09.655: E/AndroidRuntime(27660):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
09-10 08:18:09.655: E/AndroidRuntime(27660):    at java.lang.Thread.run(Thread.java:1096)
09-10 08:18:09.655: E/AndroidRuntime(27660): Caused by: java.lang.AssertionError: 5
09-10 08:18:09.655: E/AndroidRuntime(27660):    at org.nick.androidkeystore.android.security.KeyStore.state(KeyStore.java:75)
09-10 08:18:09.655: E/AndroidRuntime(27660):    at org.nick.androidkeystore.KeystoreActivity$1.doWork(KeystoreActivity.java:139)
09-10 08:18:09.655: E/AndroidRuntime(27660):    at org.nick.androidkeystore.KeystoreActivity$KeystoreTask.doInBackground(KeystoreActivity.java:96)
09-10 08:18:09.655: E/AndroidRuntime(27660):    at org.nick.androidkeystore.KeystoreActivity$KeystoreTask.doInBackground(KeystoreActivity.java:1)
09-10 08:18:09.655: E/AndroidRuntime(27660):    at android.os.AsyncTask$2.call(AsyncTask.java:185)
09-10 08:18:09.655: E/AndroidRuntime(27660):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
09-10 08:18:09.655: E/AndroidRuntime(27660):    ... 4 more
09-10 08:18:09.665: W/ActivityManager(59):   Force finishing activity org.nick.androidkeystore/.KeystoreActivity

I'm looking for a way to add password AES encryption for API 21 and upward, is the KeyStore used in this application safe for production code even for rooted devices?

in IKeystoreService
public byte[] get(java.lang.String name) throws android.os.RemoteException; returning null

Why not turn this into a nice, easy to use wrapper API? Rather than make people dig through this example?

I think a ton of people would be interested in having pre-4.3 support for KeyStore

Hi There,

Your work on the android keystore has been really helpful. I have noticed however that it doesn't work anymore with the latest Android M Preview. I am just wondering if you have any thoughts to look into this?

I have tried creating a new KeyStore class for M however I am having no such look with it.

Thanks! :)

On android 4.4.4 when I try to get the KeyStore state it always returns locked even though phone is not locked.

**here is error report-------->
error:Error:java.lang.RuntimeException:

com.android.ide.common.signing.KeytoolException: Failed to read key palash from store "D:\MyApplication3\.idea\workspace.xml": Invalid keystore format
second error:Error:com.android.ide.common.signing.KeytoolException: Failed to read key palash from store "D:\MyApplication3\.idea\workspace.xml": Invalid keystore format
third error:Error:java.io.IOException: Invalid keystore format

how to solve this three errors??????**
here is gradle console message----------->

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':app:packageRelease'.

com.android.ide.common.signing.KeytoolException: Failed to read key palash from store "D:\MyApplication3.idea\workspace.xml": Invalid keystore format

• Try:
  Run with --info or --debug option to get more log output.

• Exception is:
  org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:packageRelease'.
  at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:69)
  at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46)
  at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:35)
  at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:66)
  at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
  at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:52)
  at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
  at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:53)
  at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
  at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:203)
  at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:185)
  at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:66)
  at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:50)
  at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:25)
  at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:110)
  at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:37)
  at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:37)
  at org.gradle.execution.DefaultBuildExecuter.access$000(DefaultBuildExecuter.java:23)
  at org.gradle.execution.DefaultBuildExecuter$1.proceed(DefaultBuildExecuter.java:43)
  at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)
  at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:37)
  at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:30)
  at org.gradle.initialization.DefaultGradleLauncher$4.run(DefaultGradleLauncher.java:153)
  at org.gradle.internal.Factories$1.create(Factories.java:22)
  at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
  at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:53)
  at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:150)
  at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:32)
  at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:98)
  at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:92)
  at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
  at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:63)
  at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:92)
  at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:83)
  at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:99)
  at org.gradle.tooling.internal.provider.runner.BuildModelActionRunner.run(BuildModelActionRunner.java:46)
  at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
  at org.gradle.tooling.internal.provider.runner.SubscribableBuildActionRunner.run(SubscribableBuildActionRunner.java:58)
  at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
  at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:48)
  at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:30)
  at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:81)
  at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:46)
  at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:52)
  at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
  at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37)
  at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26)
  at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34)
  at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74)
  at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72)
  at org.gradle.util.Swapper.swap(Swapper.java:38)
  at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72)
  at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  at org.gradle.launcher.daemon.server.health.DaemonHealthTracker.execute(DaemonHealthTracker.java:47)
  at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:60)
  at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
  at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:72)
  at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
  at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  at org.gradle.launcher.daemon.server.health.HintGCAfterBuild.execute(HintGCAfterBuild.java:41)
  at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
  at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50)
  at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:237)
  at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
  at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
  Caused by: java.lang.RuntimeException: com.android.ide.common.signing.KeytoolException: Failed to read key palash from store "D:\MyApplication3.idea\workspace.xml": Invalid keystore format
  at com.android.build.gradle.tasks.PackageAndroidArtifact.doTask(PackageAndroidArtifact.java:469)
  at com.android.build.gradle.tasks.PackageAndroidArtifact.doFullTaskAction(PackageAndroidArtifact.java:321)
  at com.android.build.gradle.tasks.PackageApplication.doFullTaskAction(PackageApplication.java:75)
  at com.android.build.gradle.internal.tasks.IncrementalTask.taskAction(IncrementalTask.java:88)
  at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:75)
  at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.doExecute(AnnotationProcessingTaskFactory.java:245)
  at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:221)
  at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.execute(AnnotationProcessingTaskFactory.java:232)
  at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:210)
  at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80)
  at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61)
  ... 70 more
  Caused by: com.android.ide.common.signing.KeytoolException: Failed to read key palash from store "D:\MyApplication3.idea\workspace.xml": Invalid keystore format
  at com.android.ide.common.signing.KeystoreHelper.getCertificateInfo(KeystoreHelper.java:212)
  at com.android.build.gradle.tasks.PackageAndroidArtifact.doTask(PackageAndroidArtifact.java:431)
  ... 80 more
  Caused by: java.io.IOException: Invalid keystore format
  at com.android.ide.common.signing.KeystoreHelper.getCertificateInfo(KeystoreHelper.java:190)
  ... 81 more

BUILD FAILED

Total time: 1 mins 32.136 secs
**

Hello,
I am facing an issue where the keyStore.getEntry returns null. On some debugging I found out that the alias gets deleted somehow and thus the keystore.getEntry for that alias returns null. Your guidance on this will be great. Thanks.

Here is my query on Stackoverflow for your reference with code snippets.
http://stackoverflow.com/questions/37094464/android-keystore-issue-keystore-getentryalias-null-returns-null-sometimes

For more security, can you change old spongycastle (based on old bouncycastle) to bouncycastle?

• https://www.bouncycastle.org/
• https://www.bouncycastle.org/releasenotes.html
• http://www.bouncycastle.org/latest_releases.html
• https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=bouncy%20castle
• https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=bouncycastle
• https://www.cvedetails.com/vulnerability-list/vendor_id-7637/Bouncycastle.html