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From Andrus Adamchik <>
Subject Re: Redacting db user name and password from XML
Date Tue, 19 Dec 2017 09:19:20 GMT
Sorry. You are right. Of course the shell will resolve the vars and put the values in the process
name. Been living in Bootique world for the last 2 years, so I thought of a different scenario
of the env var being read not via System.getProperty(), but rather via System.getenv(). 

So yeah, "-D" is unsafe, but converting shell vars to Cayenne DI properties in the app "main"
method should hide the secrets from the causal observer on the app server.


> On Dec 19, 2017, at 9:45 AM, Musall, Maik <> wrote:
>> Am 19.12.2017 um 06:56 schrieb Andrus Adamchik <>:
>>> A disadvantage of this approach, though, is it puts the username/password
>>> on the command-line and/or the process list, plus potentially exposes it in
>>> command-line history, too.
>> It doesn't if you are careful. Nothing prevents you from putting these in a startup
script of your app (this is what I was kind of alluding to when I defined credentials as exported
vars). From there you have lots of options depending on how paranoid you are:
>> * restricting access to the script with UNIX permissions.
>> * storing it on an encrypted drive.
>> * creating the script dynamically on startup and then deleting when the app is started.
>> The point is that with properties you have an easy mechanism separating your security
solution away from your Java app.
> As long as those parameters end up as part of the java command line because the shell
resolves them and puts them there literally, they will still be discoverable from the process
list at runtime for every other user on the machine. The java process itself could redact
them from there, but of course it doesn't.
> The credentials would need to live in a separate file with locked down permissions, with
that file being referenced by name in the java command line.
> Maik

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