Maven: resource binary changes file size after build

Question

I am using the appengine-maven-plugin to build my Java Google App Engine project.

I include .p12 certificates in a WEB-INF sub-folder

When I build my application, the filesize of the certificate increases by a few KB. This renders it invalid. I have seen the same happen to .jks certificates too.

I have verified the validity of the certificate pre-build and used the same method to confirm the invalidity of the post-build certificate.

Can anyone tell me why the file size is changing and why it is not simply copied to the WAR?

Thanks for your help.

Masturbation

You should show us your pom, or a pom that can reproduce the issue. – Charlyncharm

Answer 1

Another solution is to disable filtering of .p12 files throughout your project by adding the following config:

<build>
  ...
  <plugins>
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-resources-plugin</artifactId>                
      <configuration>
        <nonFilteredFileExtensions>
          <nonFilteredFileExtension>p12</nonFilteredFileExtension>
        </nonFilteredFileExtensions>
      </configuration>
    </plugin>
  </plugins>
</build>

Macaroon

I had filtering in the maven-war-plugin as well. Disabling it for p12 files fixed the issue. – Viewpoint

Answer 2

It seems that maven was applying filtering to my certificate file

http://maven.apache.org/plugins/maven-resources-plugin/examples/filter.html

The solution was to disable it

<resource>
    <directory>${basedir}/src/main/webapp/certs</directory>
    <filtering>false</filtering>
    <targetPath>WEB-INF/classes</targetPath>
</resource>

This allowed the certificate to be read correctly and solved the following exception in JavaPNS

Validating keystore reference: VALID  (keystore was found)
Verifying keystore content: javapns.communication.exceptions.KeystoreException:
Keystore exception: DerInputStream.getLength(): lengthTag=111, too big. at javapns.communication.KeystoreManager.wrapKeystoreException(KeystoreManager.java:178)

Masturbation

Answer 3

I solved the problem by moving '.p12' file one directory up. So instead of keeping it in WEB-INF, I moved it up to 'webapp' directory. No filtering happens there.

Delp