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https://issues.apache.org/jira/browse/HADOOP-12942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15202400#comment-15202400
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Larry McCay commented on HADOOP-12942:
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The other thing to keep in mind is that the current situation is still better
than clear text files.
* like clear text files the main protection is file permissions
* unlike clear text files - given a file permission breach, there are no
standard tools that can get to the password value in the keystore
Even with the password to the keystore, keytool can not get to the value and
display it.
You could certainly get to it using the credential provider API directly but
this is better than clear text files that are solely protected with file
permissions.
> hadoop credential commands non-obviously use password of "none"
> ---------------------------------------------------------------
>
> Key: HADOOP-12942
> URL: https://issues.apache.org/jira/browse/HADOOP-12942
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Reporter: Mike Yoder
>
> The "hadoop credential create" command, when using a jceks provider, defaults
> to using the value of "none" for the password that protects the jceks file.
> This is not obvious in the command or in documentation - to users or to other
> hadoop developers - and leads to jceks files that essentially are not
> protected.
> In this example, I'm adding a credential entry with name of "foo" and a value
> specified by the password entered:
> {noformat}
> # hadoop credential create foo -provider localjceks://file/bar.jceks
> Enter password:
> Enter password again:
> foo has been successfully created.
> org.apache.hadoop.security.alias.LocalJavaKeyStoreProvider has been updated.
> {noformat}
> However, the password that protects the file bar.jceks is "none", and there
> is no obvious way to change that. The practical way of supplying the password
> at this time is something akin to
> {noformat}
> HADOOP_CREDSTORE_PASSWORD=credpass hadoop credential create --provider ...
> {noformat}
> That is, stuffing HADOOP_CREDSTORE_PASSWORD into the environment of the
> command.
> This is more than a documentation issue. I believe that the password ought to
> be _required_. We have three implementations at this point, the two
> JavaKeystore ones and the UserCredential. The latter is "transient" which
> does not make sense to use in this context. The former need some sort of
> password, and it's relatively easy to envision that any non-transient
> implementation would need a mechanism by which to protect the store that it's
> creating.
> The implementation gets interesting because the password in the
> AbstractJavaKeyStoreProvider is determined in the constructor, and changing
> it after the fact would get messy. So this probably means that the
> CredentialProviderFactory should have another factory method like the first
> that additionally takes the password, and an additional constructor exist in
> all the implementations that takes the password.
> Then we just ask for the password in getCredentialProvider() and that gets
> passed down to via the factory to the implementation. The code does have
> logic in the factory to try multiple providers, but I don't really see how
> multiple providers would be rationaly be used in the command shell context.
> This issue was brought to light when a user stored credentials for a Sqoop
> action in Oozie; upon trying to figure out where the password was coming from
> we discovered it to be the default value of "none".
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