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    <title>MongoDB Jira</title>
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    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[CSHARP-2366] GSSAPI Authentication starts SASL conversation wrong</title>
                <link>https://jira.mongodb.org/browse/CSHARP-2366</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;p&gt;GSSAPI Authentication is beginning the SASL conversation with an &lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/blob/81bdb1c930cd8b92026ce27c773382f6963cca95/src/MongoDB.Driver.Core/Core/Authentication/GssapiAuthenticator.cs#L255&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;empty payload&lt;/a&gt;. &lt;/p&gt;

&lt;p&gt;In 3.6 and before, MongoDB would return &lt;/p&gt;
&lt;p/&gt;
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&lt;p/&gt;
&lt;p&gt;for an empty &lt;tt&gt;saslStart&lt;/tt&gt; payload.&lt;/p&gt;

&lt;p&gt;In 4.0, MongoDB passes the empty client payload per &lt;a href=&quot;https://tools.ietf.org/html/rfc4752#section-3.2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;SASL spec&lt;/a&gt; to Kerberos which starts &lt;a href=&quot;https://github.com/krb5/krb5/blob/09c9b7d6f64767429e90ad11a529e6ffa9538043/src/lib/gssapi/spnego/spnego_mech.c#L1269-L1275&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;negotiation&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;The C# driver should not pass an empty payload unless it wants to start SPNEGO.&lt;/p&gt;

&lt;p&gt;If the C# driver does start calling &lt;tt&gt;saslStart&lt;/tt&gt; with a non-empty payload, this is compatible with all versions of MongoDB.&lt;/p&gt;</description>
                <environment></environment>
        <key id="595523">CSHARP-2366</key>
            <summary>GSSAPI Authentication starts SASL conversation wrong</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="mark.benvenuto@mongodb.com">Mark Benvenuto</assignee>
                                    <reporter username="mark.benvenuto@mongodb.com">Mark Benvenuto</reporter>
                        <labels>
                    </labels>
                <created>Mon, 27 Aug 2018 23:16:20 +0000</created>
                <updated>Sat, 28 Oct 2023 11:48:56 +0000</updated>
                            <resolved>Mon, 17 Sep 2018 19:20:27 +0000</resolved>
                                                    <fixVersion>2.7.1</fixVersion>
                                    <component>Security</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2053726" author="xgen-internal-githook" created="Tue, 6 Nov 2018 20:28:01 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mark Benvenuto&apos;, &apos;email&apos;: &apos;mark.benvenuto@mongodb.com&apos;, &apos;username&apos;: &apos;markbenvenuto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-2366&quot; title=&quot;GSSAPI Authentication starts SASL conversation wrong&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-2366&quot;&gt;&lt;del&gt;CSHARP-2366&lt;/del&gt;&lt;/a&gt;: GSSAPI Scram Authentication starts scram conversation wrong&lt;br/&gt;
Branch: v2.7.x&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/commit/77db6ea9dd55fc0ce02fd0fa9bfd2f81a662a166&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/commit/77db6ea9dd55fc0ce02fd0fa9bfd2f81a662a166&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2005447" author="xgen-internal-githook" created="Mon, 17 Sep 2018 19:13:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mark Benvenuto&apos;, &apos;email&apos;: &apos;mark.benvenuto@mongodb.com&apos;, &apos;username&apos;: &apos;markbenvenuto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-2366&quot; title=&quot;GSSAPI Authentication starts SASL conversation wrong&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-2366&quot;&gt;&lt;del&gt;CSHARP-2366&lt;/del&gt;&lt;/a&gt;: GSSAPI Scram Authentication starts scram conversation wrong&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/commit/821ba56ebedd982b713f6d995e51244df88d5ffe&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/commit/821ba56ebedd982b713f6d995e51244df88d5ffe&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2001096" author="vincent.kam" created="Wed, 12 Sep 2018 19:54:00 +0000"  >&lt;p&gt;&lt;a href=&quot;https://github.com/vincentkam/mongo-csharp-driver/pull/23&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/vincentkam/mongo-csharp-driver/pull/23&lt;/a&gt;&lt;/p&gt;</comment>
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