java - generated certificate stops working when moved to resources folder

Question

I'm having problems with a generated certificate I'm using to connect to the apple push services. All works fine when the generated p12 file was in my src/main/java folder, but I moved it to src/main/resources and it decided to stop working with the following error:

DerInputStream.getLength(): lengthTag=111, too big.

To get into some more detail: I'm using the notnoop push notifications library and followed the tutorial from Ray Wenderlich to generate the certificates. after, I used to following commands to generate a p12 file for use in java:

openssl x509 -in aps_development.cer -inform DER -out aps_development.pem -outform PEM
openssl pkcs12 -nocerts -in single.p12 -out single.pem
openssl pkcs12 -export -inkey single.pem -in aps_development.pem -out dual.p12

after that I moved the dual.p12 into my java project. At first the file was in my /src/main/java folder, lets say at com.company.push.certificates (while the code requesting the file is at com.company.push). I request an inputstream by using

InputStream stream = this.getClass().getResourceAsStream("certificates/dual.p12");

This working fine in development, but not when building the project (using maven), thats why I moved the resource to the resources folder, using the exact same package. The resource still gets found, but now I get the above-mentioned java.io.IOException

Anyone knows what might be causing this?

Ps: when I move the file back into the package in src/main/java, all works fine again, so the certificate seems to be valid.

Answer 1

This is happening because maven's resource filtering is corrupting your p12 file.

We solved this by excluding p12 files from maven resource filtering with this in pom.xml:

<resources>
    <resource>
        <directory>src/main/resources</directory>
        <filtering>true</filtering>
        <excludes>
            <exclude>**/*.p12</exclude>
        </excludes>
    </resource>
    <resource>
        <directory>src/main/resources</directory>
        <filtering>false</filtering>
        <includes>
            <include>**/*.p12</include>
        </includes>
    </resource>
</resources>