What is the official Android repository containing APKSIGNER?

What is the official source for apksigner as referenced e.g. in this [answer](https://android.stackexchange.com/a/218161/375063) ? People are citing Android Studio, Android SDK Build Tools/Platform Tools/Command Line Tools etc. (as well as some shady archives on Google Drive), but non of these contain the program. I've downloaded, installed and searched them all. Alternatively, what is the official source for Android SDK Build Tools 24.0.3, which allegedly contains the apksigner? I've found an apksigner.jar and apksigner.bat inside a private Google [repository](https://dl.google.com/android/repository/build-tools_r24.0.3-windows.zip) , but running apksigner verify --verbose --print-certs apksigner.bat verify --verbose --print-certs apksigner.jar verify --verbose --print-certs doesn't work (no output). This is the content of said batch file apksigner.bat: @echo off REM Copyright (C) 2016 The Android Open Source Project REM REM Licensed under the Apache License, Version 2.0 (the "License"); REM you may not use this file except in compliance with the License. REM You may obtain a copy of the License at REM REM http://www.apache.org/licenses/LICENSE-2.0 REM REM Unless required by applicable law or agreed to in writing, software REM distributed under the License is distributed on an "AS IS" BASIS, REM WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. REM See the License for the specific language governing permissions and REM limitations under the License. REM don't modify the caller's environment setlocal REM Locate apksigner.jar in the directory where apksigner.bat was found and start it. REM Set up prog to be the path of this script, including following symlinks, REM and set up progdir to be the fully-qualified pathname of its directory. set prog=%~f0 rem Check we have a valid Java.exe in the path. set java_exe= if exist "%~dp0..\tools\lib\find_java.bat" call "%~dp0..\tools\lib\find_java.bat" if exist "%~dp0..\..\tools\lib\find_java.bat" call "%~dp0..\..\tools\lib\find_java.bat" if not defined java_exe goto :EOF set jarfile=apksigner.jar set "frameworkdir=%~dp0" rem frameworkdir must not end with a dir sep. set "frameworkdir=%frameworkdir:~0,-1%" if exist "%frameworkdir%\%jarfile%" goto JarFileOk set "frameworkdir=%~dp0lib" if exist "%frameworkdir%\%jarfile%" goto JarFileOk set "frameworkdir=%~dp0..\framework" :JarFileOk set "jarpath=%frameworkdir%\%jarfile%" set javaOpts= set args= REM By default, give apksigner a max heap size of 1 gig and a stack size of 1meg. rem This can be overridden by using "-JXmx..." and "-JXss..." options below. set defaultXmx=-Xmx1024M set defaultXss=-Xss1m REM Capture all arguments that are not -J options. REM Note that when reading the input arguments with %1, the cmd.exe REM automagically converts --name=value arguments into 2 arguments "--name" REM followed by "value". apksigner has been changed to know how to deal with that. set params= :firstArg if [%1]==[] goto endArgs set a=%~1 if [%defaultXmx%]==[] goto notXmx if %a:~0,5% NEQ -JXmx goto notXmx set defaultXmx= :notXmx if [%defaultXss%]==[] goto notXss if %a:~0,5% NEQ -JXss goto notXss set defaultXss= :notXss if %a:~0,2% NEQ -J goto notJ set javaOpts=%javaOpts% -%a:~2% shift /1 goto firstArg :notJ set params=%params% %1 shift /1 goto firstArg :endArgs set javaOpts=%javaOpts% %defaultXmx% %defaultXss% call "%java_exe%" %javaOpts% -Djava.ext.dirs="%frameworkdir%" -jar "%jarpath%" %params% UPDATE: As suggested, I've now tried apksigner from Android Build Tools. Here is the output: Verifies Verified using v1 scheme (JAR signing): true Verified using v2 scheme (APK Signature Scheme v2): true Verified using v3 scheme (APK Signature Scheme v3): false Verified using v4 scheme (APK Signature Scheme v4): false Verified for SourceStamp: false Number of signers: 1 Signer #1 certificate DN: CN=Unknown, OU=Unknown, O=Fiducia IT AG, L=Unknown, ST =Unknown, C=DE Signer #1 certificate SHA-256 digest: 53a6afa8f0d219bba2fe84154f256ecec85b34175f fee5b7387fda0afcc12605 Signer #1 certificate SHA-1 digest: addb5ed43a27660e41acb1d39e85ddd7b9c9807c Signer #1 certificate MD5 digest: 1be8c130e83eb6b36e4aff93bcdd1b28 Signer #1 key algorithm: RSA Signer #1 key size (bits): 2048 Signer #1 public key SHA-256 digest: 671eafb570fa9e82cb7a8d5c435dad3d86990a09d5b 20f41b42e3152b3cd5a6a Signer #1 public key SHA-1 digest: c021e779e6086e20a7c60b05a0c30b94c59c83ba Signer #1 public key MD5 digest: d42dc7a6bcb0ace30d8ac316bc321c9c WARNING: META-INF/androidx.navigation_navigation-fragment.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.camera_camera-camera2.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/androidx.customview_customview.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/services/ya.k not protected by signature. Unauthorized modific ations to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.room_room-runtime.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or mo ve the entry outside of META-INF/. WARNING: META-INF/androidx.camera_camera-lifecycle.version not protected by sign ature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.browser_browser.version not protected by signature. U nauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/com.google.android.material_material.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. De lete or move the entry outside of META-INF/. WARNING: META-INF/androidx.savedstate_savedstate-ktx.version not protected by si gnature. Unauthorized modifications to this JAR entry will not be detected. Dele te or move the entry outside of META-INF/. WARNING: META-INF/androidx.activity_activity-ktx.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/kotlinx_coroutines_play_services.version not protected by sign ature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.slidingpanelayout_slidingpanelayout.version not prote cted by signature. Unauthorized modifications to this JAR entry will not be dete cted. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.dynamicanimation_dynamicanimation.version not protect ed by signature. Unauthorized modifications to this JAR entry will not be detect ed. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.exifinterface_exifinterface.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. De lete or move the entry outside of META-INF/. WARNING: META-INF/androidx.sqlite_sqlite-ktx.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or mo ve the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-extensions.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.versionedparcelable_versionedparcelable.version not p rotected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-livedata-ktx.version not protecte d by signature. Unauthorized modifications to this JAR entry will not be detecte d. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.preference_preference-ktx.version not protected by si gnature. Unauthorized modifications to this JAR entry will not be detected. Dele te or move the entry outside of META-INF/. WARNING: META-INF/androidx.preference_preference.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/androidx.navigation_navigation-ui.version not protected by sig nature. Unauthorized modifications to this JAR entry will not be detected. Delet e or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-runtime.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. De lete or move the entry outside of META-INF/. WARNING: META-INF/androidx.room_room-ktx.version not protected by signature. Una uthorized modifications to this JAR entry will not be detected. Delete or move t he entry outside of META-INF/. WARNING: META-INF/androidx.appcompat_appcompat-resources.version not protected b y signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.appcompat_appcompat.version not protected by signatur e. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-livedata.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. D elete or move the entry outside of META-INF/. WARNING: META-INF/androidx.navigation_navigation-runtime.version not protected b y signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.navigation_navigation-runtime-ktx.version not protect ed by signature. Unauthorized modifications to this JAR entry will not be detect ed. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.window_window.version not protected by signature. Una uthorized modifications to this JAR entry will not be detected. Delete or move t he entry outside of META-INF/. WARNING: META-INF/androidx.cursoradapter_cursoradapter.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. De lete or move the entry outside of META-INF/. WARNING: META-INF/androidx.savedstate_savedstate.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/androidx.fragment_fragment.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or mo ve the entry outside of META-INF/. WARNING: META-INF/androidx.vectordrawable_vectordrawable.version not protected b y signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.fragment_fragment-ktx.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/androidx.sqlite_sqlite-framework.version not protected by sign ature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.core_core.version not protected by signature. Unautho rized modifications to this JAR entry will not be detected. Delete or move the e ntry outside of META-INF/. WARNING: META-INF/androidx.vectordrawable_vectordrawable-animated.version not pr otected by signature. Unauthorized modifications to this JAR entry will not be d etected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.localbroadcastmanager_localbroadcastmanager.version n ot protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-viewmodel-savedstate.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.security_security-crypto.version not protected by sig nature. Unauthorized modifications to this JAR entry will not be detected. Delet e or move the entry outside of META-INF/. WARNING: META-INF/androidx.navigation_navigation-common-ktx.version not protecte d by signature. Unauthorized modifications to this JAR entry will not be detecte d. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.biometric_biometric.version not protected by signatur e. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-livedata-core.version not protect ed by signature. Unauthorized modifications to this JAR entry will not be detect ed. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.navigation_navigation-common.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. D elete or move the entry outside of META-INF/. WARNING: META-INF/kotlinx_coroutines_android.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or mo ve the entry outside of META-INF/. WARNING: META-INF/androidx.legacy_legacy-support-core-utils.version not protecte d by signature. Unauthorized modifications to this JAR entry will not be detecte d. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.viewpager2_viewpager2.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/androidx.transition_transition.version not protected by signat ure. Unauthorized modifications to this JAR entry will not be detected. Delete o r move the entry outside of META-INF/. WARNING: META-INF/androidx.print_print.version not protected by signature. Unaut horized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.documentfile_documentfile.version not protected by si gnature. Unauthorized modifications to this JAR entry will not be detected. Dele te or move the entry outside of META-INF/. WARNING: META-INF/androidx.core_core-ktx.version not protected by signature. Una uthorized modifications to this JAR entry will not be detected. Delete or move t he entry outside of META-INF/. WARNING: META-INF/androidx.emoji2_emoji2-views-helper.version not protected by s ignature. Unauthorized modifications to this JAR entry will not be detected. Del ete or move the entry outside of META-INF/. WARNING: META-INF/androidx.recyclerview_recyclerview.version not protected by si gnature. Unauthorized modifications to this JAR entry will not be detected. Dele te or move the entry outside of META-INF/. WARNING: META-INF/androidx.tracing_tracing.version not protected by signature. U nauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.startup_startup-runtime.version not protected by sign ature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.navigation_navigation-fragment-ktx.version not protec ted by signature. Unauthorized modifications to this JAR entry will not be detec ted. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-livedata-core-ktx.version not pro tected by signature. Unauthorized modifications to this JAR entry will not be de tected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.arch.core_core-runtime.version not protected by signa ture. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.emoji2_emoji2.version not protected by signature. Una uthorized modifications to this JAR entry will not be detected. Delete or move t he entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-viewmodel-ktx.version not protect ed by signature. Unauthorized modifications to this JAR entry will not be detect ed. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-runtime-ktx.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected . Delete or move the entry outside of META-INF/. WARNING: META-INF/services/ta.z not protected by signature. Unauthorized modific ations to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/INDEX.LIST not protected by signature. Unauthorized modificati ons to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.activity_activity.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or mo ve the entry outside of META-INF/. WARNING: META-INF/androidx.drawerlayout_drawerlayout.version not protected by si gnature. Unauthorized modifications to this JAR entry will not be detected. Dele te or move the entry outside of META-INF/. WARNING: META-INF/androidx.interpolator_interpolator.version not protected by si gnature. Unauthorized modifications to this JAR entry will not be detected. Dele te or move the entry outside of META-INF/. WARNING: META-INF/com/android/build/gradle/app-metadata.properties not protected by signature. Unauthorized modifications to this JAR entry will not be detected . Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-viewmodel.version not protected b y signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.camera_camera-core.version not protected by signature . Unauthorized modifications to this JAR entry will not be detected. Delete or m ove the entry outside of META-INF/. WARNING: META-INF/androidx.swiperefreshlayout_swiperefreshlayout.version not pro tected by signature. Unauthorized modifications to this JAR entry will not be de tected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-service.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. De lete or move the entry outside of META-INF/. WARNING: META-INF/androidx.lifecycle_lifecycle-process.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. De lete or move the entry outside of META-INF/. WARNING: META-INF/androidx.loader_loader.version not protected by signature. Una uthorized modifications to this JAR entry will not be detected. Delete or move t he entry outside of META-INF/. WARNING: META-INF/androidx.viewpager_viewpager.version not protected by signatur e. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.cardview_cardview.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or mo ve the entry outside of META-INF/. WARNING: META-INF/androidx.navigation_navigation-ui-ktx.version not protected by signature. Unauthorized modifications to this JAR entry will not be detected. D elete or move the entry outside of META-INF/. WARNING: META-INF/androidx.coordinatorlayout_coordinatorlayout.version not prote cted by signature. Unauthorized modifications to this JAR entry will not be dete cted. Delete or move the entry outside of META-INF/. WARNING: META-INF/kotlinx_coroutines_core.version not protected by signature. Un authorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.camera_camera-view.version not protected by signature . Unauthorized modifications to this JAR entry will not be detected. Delete or m ove the entry outside of META-INF/. WARNING: META-INF/androidx.annotation_annotation-experimental.version not protec ted by signature. Unauthorized modifications to this JAR entry will not be detec ted. Delete or move the entry outside of META-INF/. WARNING: META-INF/androidx.sqlite_sqlite.version not protected by signature. Una uthorized modifications to this JAR entry will not be detected. Delete or move t he entry outside of META-INF/. WARNING: META-INF/androidx.core_core-splashscreen.version not protected by signa ture. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/. What is the meaning?