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Accept async_sequence<BufferSource> in crypto.subtle.digest
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‎spec/Overview.html‎

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@@ -1271,7 +1271,7 @@ <h2>SubtleCrypto interface</h2>
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);
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Promise&lt;ArrayBuffer> digest(
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AlgorithmIdentifier algorithm,
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BufferSource data
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(BufferSource or async_sequence&lt;BufferSource>) data
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);
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Promise&lt;(CryptoKey or CryptoKeyPair)> generateKey(
@@ -1845,9 +1845,7 @@ <h4>The digest method</h4>
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</li>
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<li>
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<p>
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Let |data| be the result of
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[= get a copy of the buffer source |
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getting a copy of the bytes held by =] the `data` parameter passed to the
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Let |data| be the `data` parameter passed to the
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{{SubtleCrypto/digest()}} method.
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</p>
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</li>
@@ -1865,6 +1863,133 @@ <h4>The digest method</h4>
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|normalizedAlgorithm|.
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</p>
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</li>
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<li>
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<p>
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Let |bytesPromise| be a new Promise.
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</p>
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</li>
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<li>
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<dl class="switch">
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<dt>If |data| is a {{BufferSource}}:</dt>
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<dd>
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<ol>
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<li>
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<p>
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Let |bytes| be the result of
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[= get a copy of the buffer source |
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getting a copy of the bytes held by =] |data|.
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</p>
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</li>
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<li>
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<p>
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Resolve |bytesPromise| with |bytes|.
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</p>
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</li>
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</dd>
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<dt>
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Otherwise:
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</dt>
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<dd>
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<div class=note>
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<p>
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In this case, |data| is an [= async sequence type | async sequence =] of {{BufferSource}}s.
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</p>
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</div>
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<ol>
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<li>
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<p>
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Let |bytes| be an empty [= byte sequence =].
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</p>
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</li>
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<li>
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<p>
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Let |iterator| be the result of [= open an async sequence | opening =] |data|.
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</p>
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</li>
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<li>
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<p>
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If an error occurred, reject |bytesPromise| with
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|iterator| and terminate these steps.
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</p>
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</li>
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<li>
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<p>
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Let |getValueSteps| be the following list of steps:
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</p>
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<ol>
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<li>
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<p>
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Let |next| be the result of [= get an async iterator next value | getting the next value =] of |iterator|.
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</p>
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</li>
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<li>
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<p>
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[= promise/React =] to |next|:
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</p>
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<dl class="switch">
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<dt>If |next| was rejected with |reason|:</dt>
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<dd>
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<ol>
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<li>
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<p>
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Reject |bytesPromise| with |reason|.
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</p>
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</li>
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</ol>
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</dd>
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<dt>If |next| was fulfilled with |value|:</dt>
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<dd>
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<ol>
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<li>
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<p>
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If |value| is [= end of iteration =],
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resolve |bytesPromise| with |bytes|
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and terminate these steps.
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</p>
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</li>
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<li>
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<p>
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Append the result of [= get a copy of the buffer source |
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getting a copy of the bytes held by =] |value|
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to |bytes|.
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</p>
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</li>
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<li>
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<p>
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Perform |getValueSteps|.
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</p>
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</li>
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</ol>
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</dd>
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</dl>
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</li>
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</ol>
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</li>
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<li>
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<p>
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[= Queue a microtask =] to perform |getValueSteps|.
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</p>
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</li>
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</ol>
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<div class=note>
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<p>
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The implementation may wish to compute the hash digest
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incrementally, instead of waiting until all data is
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available, in order to conserve memory.
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</p>
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<p>
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Additionally, if the |iterator| returned by
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[= open an async sequence | opening =] |data|
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is the iterator defined by <a data-cite="streams#readablestream">`ReadableStream`</a>,
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the implementation may wish to optimize the steps
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above, for example by reading the stream directly,
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and/or <a data-cite="streams#transferrable-streams">transferring</a>
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the stream to the [= in parallel | parallel =] steps below.
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</p>
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</div>
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</dd>
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</dl>
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</li>
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<li>
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<p>
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Let |realm| be the [= relevant realm =] of [= this =].
@@ -1892,29 +2017,51 @@ <h4>The digest method</h4>
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</li>
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<li>
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<p>
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Let |digest| be the result of performing the digest
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operation specified by |normalizedAlgorithm| using
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|algorithm|, with |data|
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as |message|.
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</p>
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</li>
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<li>
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<p>
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[= Queue a global task =] on the [= crypto task source =],
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given |realm|'s global object, to perform the remaining steps.
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</p>
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</li>
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<li>
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<p>
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Let |result| be the result of [= ArrayBuffer/create | creating =] an {{ArrayBuffer}}
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in |realm|, containing |digest|.
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</p>
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</li>
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<li>
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<p>
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Resolve |promise| with
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|result|.
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[= promise/React =] to |bytesPromise|:
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</p>
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<dl class="switch">
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<dt>If |bytesPromise| was rejected with |reason|:</dt>
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<dd>
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<ol>
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<li>
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<p>
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[= exception/Throw =] |reason|.
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</p>
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</li>
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</ol>
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</dd>
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<dt>If |bytesPromise| was fulfilled with value |bytes|:</dt>
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<dd>
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<ol>
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<li>
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<p>
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Let |digest| be the result of performing the digest
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operation specified by |normalizedAlgorithm| using
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|algorithm|, with |bytes|
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as |message|.
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</p>
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</li>
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<li>
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<p>
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[= Queue a global task =] on the [= crypto task source =],
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given |realm|'s global object, to perform the remaining steps.
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</p>
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</li>
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<li>
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<p>
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Let |result| be the result of [= ArrayBuffer/create | creating =] an {{ArrayBuffer}}
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in |realm|, containing |digest|.
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</p>
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</li>
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<li>
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<p>
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Resolve |promise| with
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|result|.
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</p>
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</li>
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</ol>
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</dd>
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</dl>
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</li>
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</ol>
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</section>

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