Android Question Problem with app sign .keystore

[MarkusR]

i got message (
its with java jdk-9.0.1 & jdk-9.0.4

B4A Version: 7.80
Parse den Code. (0.00s)
Kompiliere den Code. (0.01s)
Kompiliere Layoutcode. (0.00s)
Organisiere Libraries. (0.00s)
Generiere R Datei. (0.40s)
Kompiliere generierten Java Code. (0.73s)
Convert byte code - optimized dex. (0.26s)
Packe Dateien. (0.45s)
Kopieren von Bibliothek Ressourcen (0.00s)
Signiere Paketdatei (privater Key). Error

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

 

[Erel]

Check these discussions: https://www.b4x.com/android/forum/pages/results/?query=The+security+strength+of+SHA-1+digest+algorithm+is+not+sufficient+for+this+key+size

Specifically this one: https://www.b4x.com/android/forum/threads/jarsigner-error-java-security-signatureexception-private-key-algorithm-is-not-compatible.87699/

 

[MarkusR]

thanks erel, i will use this keytool example from you.
please add this in private sign key window in next version for others.

 

[MarkusR]

SOLVED
i used this batch but my tablet (android 6.0) said app was not installed.
it happened with the b4a bridge, then i used the usb cable, a message box pop up, certificate replace, ok.
i installed via usb and it works now also with b4a bridge.

this i used in cmd window, it ask something and you just need to answer

D:\Java\jdk-9.0.4\bin\keytool -genkey -v -keystore E:\MR_B4A\mr.keystore -alias b4a -validity 3650 -keysize 1024