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From Earl Hood <earlh...@gmail.com>
Subject Re: [Ant]Read buid.xml file in memory
Date Fri, 13 Feb 2015 05:53:19 GMT
On Thu, Feb 12, 2015 at 7:54 PM, Jackie Xiao wrote:

> The thing is, we need to enable customers to work with us, but we
> don’t want to share the build scripts (I know it’s weird).

Then maybe you should consider using the Ant API directly to set your
tasks and what not, or a different tool entirely.

One method you can try, depending on how paranoid you are about your
customers accessing your "build scripts" is the following:

  - Store your build script encrypted, maybe stored as a resource in
    a jar file.
  - Decrypt the file to a temp file, launch Ant with the temp file, then
    after it loads it, delete the temp file.

This sets up a race condition, but I think this may be sufficient
because a determined persion will be able to see your scripts even if
they are all in memory.  E.g. Run your program in a debugger and trace
thru until the data is decrypted to access the raw script.

Also, you mention "encrypt", but that requires a decryption key, so how
would you prevent a customer from finding the key and decrypting the
file(s)?  Are you running as a service or privileged process and your
customers do not have local access to the systems?


> So, we want to encrypt the build.xml and give them the encrypted file.
>
> In the build process, we will decrypt build.xml in memory, and if Ant
> can read the content from memory, this should work.

Another possible approach is register your own URL protocol handler.  It
appears that Ant's builtin project helper does support a URL to a
resource, so if you create your own custom protocol and handler, this
will give you the opportunity to do your decryption phase when Ant
requests the inputstream to the resource.


Without knowing the full context of your operating environment and your
relationship with your customers, you may be looking at the problem in
the wrong way, where alternative approachs may exist that satisfy your
business constraints.

--ewh

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