Android Question private key error while compiling

Gerrit van Ewijk · Nov 15, 2017

Hello i'am a beginner in B4a now i have made a little program that i want to compile in release mode
I HAVE MADE A PRIVATE KEY BUT the problem is that I GET AN error during the release compiling .
THE ERROR IS =>
jarsigner error: java.security.InvalidKeyException: The security strength of SHA-1 digest algorithm is not sufficient for this key size
<=
IS SOMEONE FAMILAIR WITH THIS PROBLEM !
THANKS FOR READING THIS , I HOPE SOMEONE CAN HELP ME TO FIX THIS PROBLEM

Erel · Nov 16, 2017

How did you create the key?

Are you using B4A v7.3?

Which version of Java are you using (Tools - Configure Paths)?

I'm not sure why it happens, it will probably be solved by installing Java 8u102: http://www.oracle.com/technetwork/java/javase/downloads/java-archive-javase8-2177648.html
Don't forget to configure the IDE to use this version.

lemonisdead · Nov 16, 2017

Erel is right : it is the JDK version. Installing the version Erel advices will immediately solve.

Gerrit van Ewijk · Nov 16, 2017

Erel said:
How did you create the key?

Are you using B4A v7.3?

Which version of Java are you using (Tools - Configure Paths)?

I'm not sure why it happens, it will probably be solved by installing Java 8u102: http://www.oracle.com/technetwork/java/javase/downloads/java-archive-javase8-2177648.html
Don't forget to configure the IDE to use this version.

Thanks for the fast answer , will try it soon , let you now soon if it is working.

Gerrit van Ewijk · Nov 19, 2017

I'm using b4a v7.3 and installed java 8u102 the problem is still actual

lemonisdead · Nov 19, 2017

Gerrit van Ewijk said:
I'm using b4a v7.3 and installed java 8u102 the problem is still actual

Did you thought to update the path to javac in B4A IDE ?

f0raster0 · Nov 24, 2017

Hi, I'm having the same error..

jarsigner error: java.security.InvalidKeyException: The security strength of SHA-1 digest algorithm is not sufficient for this key size

B4A Version: 7.30
Java\jdk1.8.0_102\bin\javac.exe
android-27\android.jar

f0raster0 · Nov 24, 2017

Gerrit van Ewijk said:
I'm using b4a v7.3 and installed java 8u102 the problem is still actual

try \Java\jdk1.8.0_91\bin\javac.exe
I'm not sure what version should be used.. but jdk1.8.0_91 is working for me..

Gerrit van Ewijk · Jan 7, 2018

Everything works fine now sorry for late answer.
Link in b4a installation description don't show the right download page fo Java\jdk1.8.0_102\bin\javac.exe
the links go to http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
for this version you must go to http://www.oracle.com/technetwork/java/javase/downloads/java-archive-javase8-2177648.html
there are the archive downloads ,hard to find but there it is.

SMOOTSARA · Jan 25, 2018

Hi guys

I have the same problem How can I solve this problem?

DonManfred · Jan 25, 2018

arastoo said:
I have the same problem

You should ALWAYS create a NEW thread for your question.

Additionally you should post errors as TEXT and NOT images.

Android Question private key error while compiling

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