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From "He Xiaoqiao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15922) DelegationTokenAuthenticationFilter get wrong doAsUser since it does not decode URL
Date Thu, 29 Nov 2018 16:07:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16703412#comment-16703412
] 

He Xiaoqiao commented on HADOOP-15922:
--------------------------------------

[~daryn] Thank you for your correct. I upload another v005 and follow your suggestions.could
you help to revert commit and review the new one. Thanks again. 

> DelegationTokenAuthenticationFilter get wrong doAsUser since it does not decode URL
> -----------------------------------------------------------------------------------
>
>                 Key: HADOOP-15922
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15922
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: common, kms
>            Reporter: He Xiaoqiao
>            Assignee: He Xiaoqiao
>            Priority: Major
>             Fix For: 3.3.0, 3.1.2, 3.2.1
>
>         Attachments: HADOOP-15922.001.patch, HADOOP-15922.002.patch, HADOOP-15922.003.patch,
HADOOP-15922.004.patch, HADOOP-15922.005.patch
>
>
> DelegationTokenAuthenticationFilter get wrong doAsUser when proxy user from client is
complete kerberos name (e.g., user/hostname@REALM.COM, actually it is acceptable), because
DelegationTokenAuthenticationFilter does not decode DOAS parameter in URL which is encoded
by {{URLEncoder}} at client.
> e.g. KMS as example:
> a. KMSClientProvider creates connection to KMS Server using DelegationTokenAuthenticatedURL#openConnection.
> b. If KMSClientProvider is a doAsUser, KMSClientProvider will put {{doas}} with url encoded
user as one parameter of http request. 
> {code:java}
>     // proxyuser
>     if (doAs != null) {
>       extraParams.put(DO_AS, URLEncoder.encode(doAs, "UTF-8"));
>     }
> {code}
> c. when KMS server receives the request, it does not decode the proxy user.
> As result, KMS Server will get the wrong proxy user if this proxy user is complete Kerberos
Name or it includes some special character. Some other authentication and authorization exception
will throws next to it.



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