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Posted to dev@hc.apache.org by "ASF subversion and git services (Jira)" <ji...@apache.org> on 2020/07/01 10:29:00 UTC
[jira] [Commented] (HTTPCLIENT-2086) NTLM Message parse Error
[ https://issues.apache.org/jira/browse/HTTPCLIENT-2086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17149304#comment-17149304 ]
ASF subversion and git services commented on HTTPCLIENT-2086:
-------------------------------------------------------------
Commit da28440a58c381abcbd34d648372a819902fabfd in httpcomponents-client's branch refs/heads/master from Oleg Kalnichevski
[ https://gitbox.apache.org/repos/asf?p=httpcomponents-client.git;h=da28440 ]
RFC 7235 compliance, HTTPCLIENT-2086: fixed parsing of token68 based (base64-encoded) auth schemes.
> NTLM Message parse Error
> ------------------------
>
> Key: HTTPCLIENT-2086
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2086
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Affects Versions: 5.0
> Reporter: Michael Wagner
> Priority: Minor
> Fix For: 5.0.2
>
> Attachments: ntlm 407 log and stacktrace.txt, ntlm working.txt, screenshot-1.png
>
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> My Authentication endpoint returns an NTLM Message header like this:
> {code}
> "WWW-Authenticate: NTLM TlRMTVNTUAACAAAABgAGADgAAAAF.....QByAGcALgBkAGUABwAIAMG9LHviQtYBAAAAAA=="
> {code}
> Upon reading this header with {{AuthChallengeParser}} hc parses this field using the code in [line 70|https://github.com/apache/httpcomponents-client/blob/3730b03a99308ff99769fdd60e80a43230cf5aac/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/AuthChallengeParser.java#L70]:
> {code}
> if (!cursor.atEnd() && buffer.charAt(cursor.getPos()) == EQUAL_CHAR) {
> cursor.updatePos(cursor.getPos() + 1);
> final String value = tokenParser.parseValue(buffer, cursor, DELIMITER);
> return new BasicNameValuePair(token, value);
> }
> {code}
> When reading the first "=" char of the message, it interprets the value as a key-value pair. The first part of the NTLM message being the key and the second "=" the value. [Later|https://github.com/apache/httpcomponents-client/blob/3730b03a99308ff99769fdd60e80a43230cf5aac/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/AuthChallengeParser.java#L126] an AuthChallenge is later created with
> {code}
> new AuthChallenge(challengeType, schemeName, null, params.size() > 0 ? params : null);
> {code}
> where {{value}} is null and params a list containing the NTLM message without the equals signs.
> Without the "==" the next auth step fails.
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