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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <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>[DRIVERS-343] Cache SCRAM ClientKey</title>
                <link>https://jira.mongodb.org/browse/DRIVERS-343</link>
                <project id="10980" key="DRIVERS">Drivers</project>
                    <description>&lt;p&gt;The shell is going to cache and reuse ClientKey in 3.6. We should do the same in drivers. From &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26952&quot; title=&quot;Cache SCRAM-SHA-1 ClientKey&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26952&quot;&gt;&lt;del&gt;SERVER-26952&lt;/del&gt;&lt;/a&gt; ticket : &lt;/p&gt;

&lt;p&gt;SCRAM, by design, consumes a great deal of CPU resources while performing authentication. This can be a problem while populating connection pools, where many clients are authenticating at once. Fortunately, most of the expensive computations of SCRAM can be reused across multiple authentication requests. &lt;a href=&quot;https://tools.ietf.org/html/rfc5802#section-5.1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;RFC5802&lt;/a&gt; makes provisions for this:&lt;/p&gt;
&lt;blockquote&gt;
&lt;p&gt;Note that a client implementation MAY cache ClientKey&amp;amp;ServerKey (or just SaltedPassword) for later reauthentication to the same service, as it is likely that the server is going to advertise the same salt value upon reauthentication. This might be useful for mobile clients where CPU usage is a concern.&lt;/p&gt;&lt;/blockquote&gt;</description>
                <environment></environment>
        <key id="337153">DRIVERS-343</key>
            <summary>Cache SCRAM ClientKey</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="9">Done</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="bernie@mongodb.com">Bernie Hackett</reporter>
                        <labels>
                    </labels>
                <created>Wed, 7 Dec 2016 23:42:58 +0000</created>
                <updated>Fri, 10 Sep 2021 18:43:05 +0000</updated>
                            <resolved>Thu, 5 Dec 2019 19:09:30 +0000</resolved>
                                                                            <votes>0</votes>
                                    <watches>10</watches>
                                                                                                                <comments>
                            <comment id="1827573" author="behackett" created="Thu, 8 Mar 2018 17:44:43 +0000"  >&lt;p&gt;Updated to make it clear this is for SCRAM, regardless of digest, now that we have SCRAM-SHA-256.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10011">
                    <name>Depends</name>
                                            <outwardlinks description="depends on">
                                        <issuelink>
            <issuekey id="411188">GODRIVER-46</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="381287">JAVA-2510</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="669496">RUST-60</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="381284">CDRIVER-2150</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="381286">CSHARP-1977</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="381285">CXX-1333</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="436271">MOTOR-167</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="381288">NODE-990</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="381292">PHPC-960</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="381289">PYTHON-1273</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="381290">RUBY-1213</issuekey>
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                                                        </issuelinktype>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="548515">DRIVERS-490</issuekey>
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                                    </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="507883">CDRIVER-2539</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="330481">SERVER-26952</issuekey>
        </issuelink>
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    <td class='key'>
      <a href='https://jira.mongodb.org/browse/CXX-1333'>CXX-1333</a>
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    <td>Works as Designed</td>
    <td class='hasFixVersion'>3.2.0-rc0</td>
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      <a href='https://jira.mongodb.org/browse/SCALA-302'>SCALA-302</a>
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    <td class='hasFixVersion'>2.2.0</td>
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      <a href='https://jira.mongodb.org/browse/JAVA-2510'>JAVA-2510</a>
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    <td>Fixed</td>
    <td class='hasFixVersion'>3.8.0</td>
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      <a href='https://jira.mongodb.org/browse/CSHARP-1977'>CSHARP-1977</a>
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    <td>Fixed</td>
    <td class='hasFixVersion'>2.9.0</td>
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      <a href='https://jira.mongodb.org/browse/CDRIVER-2150'>CDRIVER-2150</a>
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    <td class='hasFixVersion'>1.7.0</td>
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    <td>Fixed</td>
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    <td class='hasFixVersion'>1.3.0</td>
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    <td class='key'>
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    <td>Fixed</td>
    <td class='hasFixVersion'>2.0.0</td>
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    <td class='key'>
      <a href='https://jira.mongodb.org/browse/GODRIVER-46'>GODRIVER-46</a>
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    <td>Fixed</td>
    <td class='hasFixVersion'>0.0.1</td>
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    <td class='key'>
      <a href='https://jira.mongodb.org/browse/MOTOR-167'>MOTOR-167</a>
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    <td>Fixed</td>
    <td class='hasFixVersion'>2.0</td>
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    <td class='key'>
      <a href='https://jira.mongodb.org/browse/SWIFT-187'>SWIFT-187</a>
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  <tr>
    <td class='key'>
      <a href='https://jira.mongodb.org/browse/RUST-60'>RUST-60</a>
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    <td>Fixed</td>
    <td class='hasFixVersion'>0.9.0-alpha</td>
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