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<title>sha256 - The Go Programming Language</title>
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<h1>Package sha256</h1>
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<div id="short-nav"> <dl> <dd><code>import "crypto/sha256"</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 sha256 implements the SHA224 and SHA256 hash algorithms as defined in FIPS 180-4. </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#pkg-constants">Constants</a></dd> <dd><a href="index.html#New">func New() hash.Hash</a></dd> <dd><a href="index.html#New224">func New224() hash.Hash</a></dd> <dd><a href="index.html#Sum224">func Sum224(data []byte) (sum224 [Size224]byte)</a></dd> <dd><a href="index.html#Sum256">func Sum256(data []byte) [Size]byte</a></dd> </dl> </div><!-- #manual-nav -->
<h4>Package files</h4> <p> <span style="font-size:90%"> <a href="http://localhost:6060/src/crypto/sha256/sha256.go">sha256.go</a> <a href="http://localhost:6060/src/crypto/sha256/sha256block_decl.go">sha256block_decl.go</a> </span> </p> </div><!-- .expanded --> </div><!-- #pkg-index -->
<div id="pkg-callgraph" class="toggle" style="display: none"> <div class="collapsed"> <h2 class="toggleButton" title="Click to show Internal Call Graph section">Internal call graph ▹</h2> </div> <!-- .expanded --> <div class="expanded"> <h2 class="toggleButton" title="Click to hide Internal Call Graph section">Internal call graph ▾</h2> <p> In the call graph viewer below, each node is a function belonging to this package and its children are the functions it calls—perhaps dynamically. </p> <p> The root nodes are the entry points of the package: functions that may be called from outside the package. There may be non-exported or anonymous functions among them if they are called dynamically from another package. </p> <p> Click a node to visit that function's source code. From there you can visit its callers by clicking its declaring <code>func</code> token. </p> <p> Functions may be omitted if they were determined to be unreachable in the particular programs or tests that were analyzed. </p> <!-- Zero means show all package entry points. --> <ul style="margin-left: 0.5in" id="callgraph-0" class="treeview"></ul> </div> </div> <!-- #pkg-callgraph -->
<h2 id="pkg-constants">Constants</h2> <pre>const <span id="BlockSize">BlockSize</span> = 64</pre> <p> The blocksize of SHA256 and SHA224 in bytes. </p>
<pre>const <span id="Size">Size</span> = 32</pre> <p> The size of a SHA256 checksum in bytes. </p>
<pre>const <span id="Size224">Size224</span> = 28</pre> <p> The size of a SHA224 checksum in bytes. </p>
<h2 id="New">func <a href="http://localhost:6060/src/crypto/sha256/sha256.go?s=1643:1663#L72">New</a></h2> <pre>func New() <a href="../../hash/index.html">hash</a>.<a href="../../hash/index.html#Hash">Hash</a></pre> <p> New returns a new hash.Hash computing the SHA256 checksum. </p>
<h2 id="New224">func <a href="http://localhost:6060/src/crypto/sha256/sha256.go?s=1773:1796#L79">New224</a></h2> <pre>func New224() <a href="../../hash/index.html">hash</a>.<a href="../../hash/index.html#Hash">Hash</a></pre> <p> New224 returns a new hash.Hash computing the SHA224 checksum. </p>
<h2 id="Sum224">func <a href="http://localhost:6060/src/crypto/sha256/sha256.go?s=3420:3467#L175">Sum224</a></h2> <pre>func Sum224(data []<a href="../../builtin/index.html#byte">byte</a>) (sum224 [<a href="index.html#Size224">Size224</a>]<a href="../../builtin/index.html#byte">byte</a>)</pre> <p> Sum224 returns the SHA224 checksum of the data. </p>
<h2 id="Sum256">func <a href="http://localhost:6060/src/crypto/sha256/sha256.go?s=3267:3302#L167">Sum256</a></h2> <pre>func Sum256(data []<a href="../../builtin/index.html#byte">byte</a>) [<a href="index.html#Size">Size</a>]<a href="../../builtin/index.html#byte">byte</a></pre> <p> Sum256 returns the SHA256 checksum of the data. </p>
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