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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [WTF] Introduce WTF::RandomDevice which keeps /dev/urandom opened"
href="https://bugs.webkit.org/show_bug.cgi?id=170095">170095</a>
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<th>Summary</th>
<td>[WTF] Introduce WTF::RandomDevice which keeps /dev/urandom opened
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<th>Product</th>
<td>WebKit
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<th>Version</th>
<td>WebKit Nightly Build
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<th>Hardware</th>
<td>Unspecified
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<th>OS</th>
<td>Unspecified
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>Normal
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>Web Template Framework
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>utatane.tea@gmail.com
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<p>
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<pre>Currently, everytime cryptographicallyRandomValuesFromOS is called, /dev/urandom is opened and closed.
In addition to unnecessary system calls, especially open is not so scalable due to its POSIX requirement returning the lowest file descriptor number[1].
Instead, we introduce a new class RandomDevice. It keeps `/dev/urandom` file opened in its member.
In the subsequent patch, it may be useful that changing cryptographicallyRandomValuesFromOS to use static RandomDevice for the process.
[1]: <a href="http://dl.acm.org/citation.cfm?id=2522712">http://dl.acm.org/citation.cfm?id=2522712</a></pre>
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