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Allow length=0 in HKDF and PBKDF2 derive bits operations (#380)
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SHA: d4ffcad
Reason: push, by twiss

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
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twiss and github-actions[bot] committed Nov 8, 2024
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<meta name="description" content="This specification describes a JavaScript API for performing basic
cryptographic operations in web applications, such as hashing,
signature generation and verification, and encryption and decryption.
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<body class="h-entry" data-cite="WEBIDL html dom webidl infra encoding"><div class="head">
<p class="logos"><a class="logo" href="https://www.w3.org/"><img crossorigin="" alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2021/logos/W3C" width="72">
</a></p>
<h1 id="title" class="title">Web Cryptography API</h1>
<p id="w3c-state"><a href="https://www.w3.org/standards/types#ED">W3C Editor's Draft</a> <time class="dt-published" datetime="2024-10-25">25 October 2024</time></p>
<p id="w3c-state"><a href="https://www.w3.org/standards/types#ED">W3C Editor's Draft</a> <time class="dt-published" datetime="2024-11-08">08 November 2024</time></p>
<details open="">
<summary>More details about this document</summary>
<dl>
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<ol>
<li>
<p>
If <var>length</var> is null or zero, or is not a multiple of 8, then <a data-link-type="dfn|abstract-op" data-type="dfn" href="https://webidl.spec.whatwg.org/#dfn-throw">throw</a> an <a data-link-type="idl" data-lt="OperationError" data-type="exception" href="https://webidl.spec.whatwg.org/#operationerror"><code>OperationError</code></a>.
If <var>length</var> is null or is not a multiple of 8, then <a data-link-type="dfn|abstract-op" data-type="dfn" href="https://webidl.spec.whatwg.org/#dfn-throw">throw</a> an <a data-link-type="idl" data-lt="OperationError" data-type="exception" href="https://webidl.spec.whatwg.org/#operationerror"><code>OperationError</code></a>.
</p>
</li>
<li>
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</li>
<li>
<p>
Return <var>result</var>.
Return the result of <a data-link-type="dfn|abstract-op" data-lt="create" data-type="dfn" href="https://webidl.spec.whatwg.org/#arraybuffer-create">creating</a>
an <a data-link-type="idl" data-lt="ArrayBuffer" data-type="interface" href="https://webidl.spec.whatwg.org/#idl-ArrayBuffer"><code>ArrayBuffer</code></a> containing <var>result</var>.
</p>
</li>
</ol>
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<ol>
<li>
<p>
If <var>length</var> is null or zero, or is not a multiple of 8, then <a data-link-type="dfn|abstract-op" data-type="dfn" href="https://webidl.spec.whatwg.org/#dfn-throw">throw</a> an <a data-link-type="idl" data-lt="OperationError" data-type="exception" href="https://webidl.spec.whatwg.org/#operationerror"><code>OperationError</code></a>.
If <var>length</var> is null or is not a multiple of 8, then <a data-link-type="dfn|abstract-op" data-type="dfn" href="https://webidl.spec.whatwg.org/#dfn-throw">throw</a> an <a data-link-type="idl" data-lt="OperationError" data-type="exception" href="https://webidl.spec.whatwg.org/#operationerror"><code>OperationError</code></a>.
</p>
</li>
<li>
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then <a data-link-type="dfn|abstract-op" data-type="dfn" href="https://webidl.spec.whatwg.org/#dfn-throw">throw</a> an <a data-link-type="idl" data-lt="OperationError" data-type="exception" href="https://webidl.spec.whatwg.org/#operationerror"><code>OperationError</code></a>.
</p>
</li>
<li>
<p>
If <var>length</var> is zero, return the result of
<a data-link-type="dfn|abstract-op" data-lt="create" data-type="dfn" href="https://webidl.spec.whatwg.org/#arraybuffer-create">creating</a> an <a data-link-type="idl" data-lt="ArrayBuffer" data-type="interface" href="https://webidl.spec.whatwg.org/#idl-ArrayBuffer"><code>ArrayBuffer</code></a>
containing an empty <a data-link-type="dfn|abstract-op" data-type="dfn" href="https://infra.spec.whatwg.org/#byte-sequence">byte sequence</a>.
</p>
</li>
<li>
<p>
Let <var>prf</var> be the MAC Generation function described in Section 4 of
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</li>
<li>
<p>
Return <var>result</var>
Return the result of <a data-link-type="dfn|abstract-op" data-lt="create" data-type="dfn" href="https://webidl.spec.whatwg.org/#arraybuffer-create">creating</a>
an <a data-link-type="idl" data-lt="ArrayBuffer" data-type="interface" href="https://webidl.spec.whatwg.org/#idl-ArrayBuffer"><code>ArrayBuffer</code></a> containing <var>result</var>.
</p>
</li>
</ol>
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