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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>[CDRIVER-2579] Handshake changes for SDAM and Auth</title>
                <link>https://jira.mongodb.org/browse/CDRIVER-2579</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;p&gt;tl;dr:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;Monitoring-only  sockets must not send SCRAM mechanism negotiation in &lt;tt&gt;isMaster&lt;/tt&gt; and must not authenticate at all.&lt;/li&gt;
	&lt;li&gt;Non-monitoring sockets (e.g. connection pool or single-threaded client) do a &quot;normal&quot; handshake and authenticate if there are credentials.&lt;/li&gt;
	&lt;li&gt;An authentication error on a socket must close all (and only) non-monitoring sockets to the same server.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Possible backward breaking change:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Some drivers were resetting a server&apos;s topology description to Unknown on an authentication error and should stop doing so.  This means the topology will always be &quot;correct&quot; even when authentication fails.&lt;/li&gt;
	&lt;li&gt;It will no longer be possible for authentication errors to be masked as server selection errors.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Detailed changes:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://github.com/mongodb/specifications/commit/df4bc0b3224befda92af7a0bdfd10183deae29df&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/specifications/commit/df4bc0b3224befda92af7a0bdfd10183deae29df&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;https://github.com/mongodb/specifications/commit/64ddab6b40e78aed2f7d2134195c04e382837eb3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/specifications/commit/64ddab6b40e78aed2f7d2134195c04e382837eb3&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;
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                <environment></environment>
        <key id="518980">CDRIVER-2579</key>
            <summary>Handshake changes for SDAM and Auth</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="kevin.albertson@mongodb.com">Kevin Albertson</assignee>
                                    <reporter username="rathi.gnanasekaran">Rathi Gnanasekaran</reporter>
                        <labels>
                    </labels>
                <created>Thu, 29 Mar 2018 19:27:24 +0000</created>
                <updated>Wed, 10 Jan 2024 16:40:38 +0000</updated>
                            <resolved>Wed, 13 Jun 2018 14:41:29 +0000</resolved>
                                                    <fixVersion>1.11.0</fixVersion>
                                    <component>auth</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="1919482" author="xgen-internal-githook" created="Wed, 13 Jun 2018 14:27:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;kevinAlbs&apos;, &apos;name&apos;: &apos;Kevin Albertson&apos;, &apos;email&apos;: &apos;kevin.albertson@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-2579&quot; title=&quot;Handshake changes for SDAM and Auth&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-2579&quot;&gt;&lt;del&gt;CDRIVER-2579&lt;/del&gt;&lt;/a&gt; handshake changes for auth&lt;/p&gt;

&lt;p&gt;Negotiate auth mechanisms when authenticating against a node. Single&lt;br/&gt;
threaded clients negotiate in the topology scanner the first time&lt;br/&gt;
running an ismaster against a node. Pooled clients negotiate when&lt;br/&gt;
a cluster stream is created.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/commit/c67dc1636596d9340b8e5fe8e0c41cc4aa90fb76&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-c-driver/commit/c67dc1636596d9340b8e5fe8e0c41cc4aa90fb76&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="518976">CXX-1541</issuekey>
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            <issuekey id="518977">PHPC-1153</issuekey>
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            <issuekey id="518151">DRIVERS-466</issuekey>
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