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<h1>Package subtle</h1>
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<div id="short-nav"> <dl> <dd><code>import "crypto/subtle"</code></dd> </dl> <dl> <dd><a href="index.html#pkg-overview" class="overviewLink">Overview</a></dd> <dd><a href="index.html#pkg-index" class="indexLink">Index</a></dd> </dl> </div> <!-- The package's Name is printed as title by the top-level template --> <div id="pkg-overview" class="toggleVisible"> <div class="collapsed"> <h2 class="toggleButton" title="Click to show Overview section">Overview ▹</h2> </div> <div class="expanded"> <h2 class="toggleButton" title="Click to hide Overview section">Overview ▾</h2> <p> Package subtle implements functions that are often useful in cryptographic code but require careful thought to use correctly. </p>
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<!-- Table of contents for API; must be named manual-nav to turn off auto nav. --> <div id="manual-nav"> <dl> <dd><a href="index.html#ConstantTimeByteEq">func ConstantTimeByteEq(x, y uint8) int</a></dd> <dd><a href="index.html#ConstantTimeCompare">func ConstantTimeCompare(x, y []byte) int</a></dd> <dd><a href="index.html#ConstantTimeCopy">func ConstantTimeCopy(v int, x, y []byte)</a></dd> <dd><a href="index.html#ConstantTimeEq">func ConstantTimeEq(x, y int32) int</a></dd> <dd><a href="index.html#ConstantTimeLessOrEq">func ConstantTimeLessOrEq(x, y int) int</a></dd> <dd><a href="index.html#ConstantTimeSelect">func ConstantTimeSelect(v, x, y int) int</a></dd> </dl> </div><!-- #manual-nav -->
<h4>Package files</h4> <p> <span style="font-size:90%"> <a href="http://localhost:6060/src/crypto/subtle/constant_time.go">constant_time.go</a> </span> </p> </div><!-- .expanded --> </div><!-- #pkg-index -->
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<h2 id="ConstantTimeByteEq">func <a href="http://localhost:6060/src/crypto/subtle/constant_time.go?s=922:961#L21">ConstantTimeByteEq</a></h2> <pre>func ConstantTimeByteEq(x, y <a href="../../builtin/index.html#uint8">uint8</a>) <a href="../../builtin/index.html#int">int</a></pre> <p> ConstantTimeByteEq returns 1 if x == y and 0 otherwise. </p>
<h2 id="ConstantTimeCompare">func <a href="http://localhost:6060/src/crypto/subtle/constant_time.go?s=490:531#L2">ConstantTimeCompare</a></h2> <pre>func ConstantTimeCompare(x, y []<a href="../../builtin/index.html#byte">byte</a>) <a href="../../builtin/index.html#int">int</a></pre> <p> ConstantTimeCompare returns 1 iff the two slices, x and y, have equal contents. The time taken is a function of the length of the slices and is independent of the contents. </p>
<h2 id="ConstantTimeCopy">func <a href="http://localhost:6060/src/crypto/subtle/constant_time.go?s=1415:1456#L45">ConstantTimeCopy</a></h2> <pre>func ConstantTimeCopy(v <a href="../../builtin/index.html#int">int</a>, x, y []<a href="../../builtin/index.html#byte">byte</a>)</pre> <p> ConstantTimeCopy copies the contents of y into x (a slice of equal length) if v == 1. If v == 0, x is left unchanged. Its behavior is undefined if v takes any other value. </p>
<h2 id="ConstantTimeEq">func <a href="http://localhost:6060/src/crypto/subtle/constant_time.go?s=1092:1127#L31">ConstantTimeEq</a></h2> <pre>func ConstantTimeEq(x, y <a href="../../builtin/index.html#int32">int32</a>) <a href="../../builtin/index.html#int">int</a></pre> <p> ConstantTimeEq returns 1 if x == y and 0 otherwise. </p>
<h2 id="ConstantTimeLessOrEq">func <a href="http://localhost:6060/src/crypto/subtle/constant_time.go?s=1781:1820#L59">ConstantTimeLessOrEq</a></h2> <pre>func ConstantTimeLessOrEq(x, y <a href="../../builtin/index.html#int">int</a>) <a href="../../builtin/index.html#int">int</a></pre> <p> ConstantTimeLessOrEq returns 1 if x <= y and 0 otherwise. Its behavior is undefined if x or y are negative or > 2**31 - 1. </p>
<h2 id="ConstantTimeSelect">func <a href="http://localhost:6060/src/crypto/subtle/constant_time.go?s=791:831#L18">ConstantTimeSelect</a></h2> <pre>func ConstantTimeSelect(v, x, y <a href="../../builtin/index.html#int">int</a>) <a href="../../builtin/index.html#int">int</a></pre> <p> ConstantTimeSelect returns x if v is 1 and y if v is 0. Its behavior is undefined if v takes any other value. </p>
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