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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - CSP: Define explicitly datatype for nonce"
href="https://bugs.webkit.org/show_bug.cgi?id=156086">156086</a>
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<th>Summary</th>
<td>CSP: Define explicitly datatype for nonce
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<th>Classification</th>
<td>Unclassified
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<th>Product</th>
<td>WebKit
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<th>Version</th>
<td>WebKit Local Build
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>All
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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>WebCore Misc.
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>dbates@webkit.org
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<p>
<div>
<pre>Currently in the Content Security Policy code we represent nonces as String objects and have overloaded functions that take either a URL or a nonce. Notice that a URL object can be implicitly converted to a String object because the URL class defines a String conversion operator. This makes passing a nonce to an overloaded functions with default arguments that accepts either a URL or String in the same argument position error prone because the compiler may chose to implicitly convert a URL to a String and call the overloaded function for a nonce. One example of fragile function because of the implicit conversion of URL to String is the static non-member function checkFrameAncestors() (defined in file ContentSecurityPolicyDirectiveList.cpp): <<a href="http://trac.webkit.org/browser/trunk/Source/WebCore/page/csp/ContentSecurityPolicyDirectiveList.cpp?rev=198920#L79">http://trac.webkit.org/browser/trunk/Source/WebCore/page/csp/ContentSecurityPolicyDirectiveList.cpp?rev=1
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</p>
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