signature check failed



The “archive” parameter was pointing to a jar file that was not signed with a valid certificate.


The .jar file contained more than one signature. This could be seen by unzipping the .jar file. Within the META-INF folder, there were two sets of .DSA and .SF files, where there only should have been one.


If the unsigned .jar file is available, proceed to Step 4.  Otherwise, follow the steps below:

1. Unzip the jar file

2. Delete the folder META-INF

3. Re-jar the classes again, for example, on Unix:

export PATH=$ORACLE_HOME/dk/bin:$PATH
jar -cvf host.jar *.*

4. Sign the jar file using a valid certificate (in the example below, is used, instead you can use your own signer)

cd $ORACLE_HOME/forms/java
export PATH=$ORACLE_HOME/jdk/bin:$PATH
$ORACLE_HOME/forms/webutil/ $ORACLE_HOME/forms/java/host.jar
References  ID 1141836.1

About Sher khan

Senior Oracle DBA, Oracle 10g , Oracle 11g OCE ,Oracle 12C and Oracle 11g OPN certified Specialist, OCP Certified in Oracle 9i,10g , 11g and 12C. I am working in Oracle technology since 2004. Currently working in U.A.E Email:
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