Error launching Kindlet: "This item is not signed by an authorized developer."

Hector47 · 06-04-2018, 04:49 AM

Hello,

When I try to run an custom Kindlet I get the following message "This item is not signed by an authorized developer. Please Contact the developer"

I have follow the step in https://www.mobileread.com/forums/sh...d.php?t=219663
for creating the manifest and signing the jar.

I'm using the commands line to build/sign the jar

Code:

javac com\nowhere\sample\*.java -cp log4j-1.2.15.jar;Kindlet-1.3.jar
jar cvmf test.manifest Test.jar com
jarsigner -keystore developer.keystore -storepass password Test.jar dktest
jarsigner -keystore developer.keystore -storepass password Test.jar ditest
jarsigner -keystore developer.keystore -storepass password Test.jar dntest
move Test.jar Test.azw2

the keystore file is the newest from https://www.mobileread.com/forums/sh...d.php?t=152294 and I have the same on my K4.

Does someone has ever encounter this error ?

Thanks

knc1 · 06-04-2018, 11:49 AM

Quote:

Originally Posted by Hector47

Hello,

When I try to run an custom Kindlet I get the following message "This item is not signed by an authorized developer. Please Contact the developer"

I have follow the step in https://www.mobileread.com/forums/sh...d.php?t=219663
for creating the manifest and signing the jar.

I'm using the commands line to build/sign the jar

Code:

javac com\nowhere\sample\*.java -cp log4j-1.2.15.jar;Kindlet-1.3.jar
jar cvmf test.manifest Test.jar com
jarsigner -keystore developer.keystore -storepass password Test.jar dktest
jarsigner -keystore developer.keystore -storepass password Test.jar ditest
jarsigner -keystore developer.keystore -storepass password Test.jar dntest
move Test.jar Test.azw2

the keystore file is the newest from https://www.mobileread.com/forums/sh...d.php?t=152294 and I have the same on my K4.

Does someone has ever encounter this error ?

Thanks

So shouldn't you be standing in front of a mirror and asking yourself?

If that does not work for you, try reading the Kindlet documentation in our Wiki.
Which is indexed in the "Master Index" sticky thread.
Which is in the sticky section of this forum's index, with "Where do I start?" included in the thread title.

All Kindlet developers have seen that message before, it seems very common until the developer in question reads the directions.

NiLuJe · 06-04-2018, 12:43 PM

See also this very recent thread.

The JDK variant you're using *may* have an impact.

A definite no-no is: Don't use Java 9, it dropped support for the (old) profile the Kindle needs.

Barring that, I've never had issues with Oracle's JDK, without having to resort to digging out a truly ancient version.

You may need to specify a specific algorithm for the signing process, c.f., KUAL's ant recipe.

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06-04-2018, 12:43 PM	#3
NiLuJe BLAM! Posts: 13,478 Karma: 26012494 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	See also this very recent thread. The JDK variant you're using may have an impact. A definite no-no is: Don't use Java 9, it dropped support for the (old) profile the Kindle needs. Barring that, I've never had issues with Oracle's JDK, without having to resort to digging out a truly ancient version. You may need to specify a specific algorithm for the signing process, c.f., KUAL's ant recipe.