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https://issues.apache.org/jira/browse/HADOOP-15922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16706737#comment-16706737
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He Xiaoqiao commented on HADOOP-15922:
--------------------------------------
[~eyang] Thanks for your feedback.
Actually, if use 'fool/localhost' as impersonate user for ut, KerberosName
could not check pass after revert HADOOP-12751, since KerberosName#apply check
if impersonate user name include '/' or '@' when apply rule like
'RULE:[2:$1/$2]', and it throws exception because HADOOP-12751.
{quote} if (result != null && nonSimplePattern.matcher(result).find()) {
throw new NoMatchingRule("Non-simple name " + result +
" after auth_to_local rule " + this);
}{quote}
Before revert HADOOP-12751, this check just LOG.info and not throw exception.
IIUC, this is a common issue: if using auth_to_local and some rule include '/'
or '@', it always throw exception. FYI.
> 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,
> HADOOP-15922.006.patch
>
>
> DelegationTokenAuthenticationFilter get wrong doAsUser when proxy user from
> client is complete kerberos name (e.g., user/[email protected], 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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