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328 lines
9.1 KiB
328 lines
9.1 KiB
<!DOCTYPE html>
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<title>des - The Go Programming Language</title>
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<link type="text/css" rel="stylesheet" href="../../../lib/godoc/style.css">
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<link rel="stylesheet" href="../../../lib/godoc/jquery.treeview.css">
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<body>
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<div id='lowframe' style="position: fixed; bottom: 0; left: 0; height: 0; width: 100%; border-top: thin solid grey; background-color: white; overflow: auto;">
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...
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</div><!-- #lowframe -->
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<div id="topbar" class="wide"><div class="container">
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<div class="top-heading" id="heading-wide"><a href="http://localhost:6060/">The Go Programming Language</a></div>
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<div class="top-heading" id="heading-narrow"><a href="http://localhost:6060/">Go</a></div>
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<h1>Package des</h1>
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<div id="nav"></div>
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<!--
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Copyright 2009 The Go Authors. All rights reserved.
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file.
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-->
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<!--
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Note: Static (i.e., not template-generated) href and id
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attributes start with "pkg-" to make it impossible for
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them to conflict with generated attributes (some of which
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correspond to Go identifiers).
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-->
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<script type='text/javascript'>
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document.ANALYSIS_DATA = null;
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document.CALLGRAPH = null;
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</script>
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<div id="short-nav">
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<dl>
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<dd><code>import "crypto/des"</code></dd>
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</dl>
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<dl>
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<dd><a href="index.html#pkg-overview" class="overviewLink">Overview</a></dd>
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<dd><a href="index.html#pkg-index" class="indexLink">Index</a></dd>
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<dd><a href="index.html#pkg-examples" class="examplesLink">Examples</a></dd>
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</dl>
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</div>
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<!-- The package's Name is printed as title by the top-level template -->
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<div id="pkg-overview" class="toggleVisible">
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<div class="collapsed">
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<h2 class="toggleButton" title="Click to show Overview section">Overview ▹</h2>
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</div>
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<div class="expanded">
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<h2 class="toggleButton" title="Click to hide Overview section">Overview ▾</h2>
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<p>
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Package des implements the Data Encryption Standard (DES) and the
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Triple Data Encryption Algorithm (TDEA) as defined
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in U.S. Federal Information Processing Standards Publication 46-3.
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</p>
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</div>
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</div>
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<div id="pkg-index" class="toggleVisible">
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<div class="collapsed">
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<h2 class="toggleButton" title="Click to show Index section">Index ▹</h2>
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</div>
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<div class="expanded">
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<h2 class="toggleButton" title="Click to hide Index section">Index ▾</h2>
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<!-- Table of contents for API; must be named manual-nav to turn off auto nav. -->
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<div id="manual-nav">
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<dl>
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<dd><a href="index.html#pkg-constants">Constants</a></dd>
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<dd><a href="index.html#NewCipher">func NewCipher(key []byte) (cipher.Block, error)</a></dd>
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<dd><a href="index.html#NewTripleDESCipher">func NewTripleDESCipher(key []byte) (cipher.Block, error)</a></dd>
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<dd><a href="index.html#KeySizeError">type KeySizeError</a></dd>
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<dd> <a href="index.html#KeySizeError.Error">func (k KeySizeError) Error() string</a></dd>
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</dl>
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</div><!-- #manual-nav -->
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<div id="pkg-examples">
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<h4>Examples</h4>
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<dl>
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<dd><a class="exampleLink" href="index.html#example_NewTripleDESCipher">NewTripleDESCipher</a></dd>
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</dl>
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</div>
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<h4>Package files</h4>
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<p>
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<span style="font-size:90%">
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<a href="http://localhost:6060/src/crypto/des/block.go">block.go</a>
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<a href="http://localhost:6060/src/crypto/des/cipher.go">cipher.go</a>
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<a href="http://localhost:6060/src/crypto/des/const.go">const.go</a>
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</span>
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</p>
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</div><!-- .expanded -->
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</div><!-- #pkg-index -->
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<div id="pkg-callgraph" class="toggle" style="display: none">
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<div class="collapsed">
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<h2 class="toggleButton" title="Click to show Internal Call Graph section">Internal call graph ▹</h2>
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</div> <!-- .expanded -->
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<div class="expanded">
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<h2 class="toggleButton" title="Click to hide Internal Call Graph section">Internal call graph ▾</h2>
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<p>
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In the call graph viewer below, each node
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is a function belonging to this package
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and its children are the functions it
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calls—perhaps dynamically.
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</p>
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<p>
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The root nodes are the entry points of the
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package: functions that may be called from
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outside the package.
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There may be non-exported or anonymous
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functions among them if they are called
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dynamically from another package.
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</p>
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<p>
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Click a node to visit that function's source code.
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From there you can visit its callers by
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clicking its declaring <code>func</code>
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token.
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</p>
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<p>
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Functions may be omitted if they were
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determined to be unreachable in the
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particular programs or tests that were
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analyzed.
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</p>
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<!-- Zero means show all package entry points. -->
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<ul style="margin-left: 0.5in" id="callgraph-0" class="treeview"></ul>
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</div>
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</div> <!-- #pkg-callgraph -->
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<h2 id="pkg-constants">Constants</h2>
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<pre>const <span id="BlockSize">BlockSize</span> = 8</pre>
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<p>
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The DES block size in bytes.
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</p>
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<h2 id="NewCipher">func <a href="http://localhost:6060/src/crypto/des/cipher.go?s=541:589#L17">NewCipher</a></h2>
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<pre>func NewCipher(key []<a href="../../builtin/index.html#byte">byte</a>) (<a href="../cipher/index.html">cipher</a>.<a href="../cipher/index.html#Block">Block</a>, <a href="../../builtin/index.html#error">error</a>)</pre>
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<p>
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NewCipher creates and returns a new cipher.Block.
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</p>
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<h2 id="NewTripleDESCipher">func <a href="http://localhost:6060/src/crypto/des/cipher.go?s=1141:1198#L39">NewTripleDESCipher</a></h2>
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<pre>func NewTripleDESCipher(key []<a href="../../builtin/index.html#byte">byte</a>) (<a href="../cipher/index.html">cipher</a>.<a href="../cipher/index.html#Block">Block</a>, <a href="../../builtin/index.html#error">error</a>)</pre>
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<p>
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NewTripleDESCipher creates and returns a new cipher.Block.
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</p>
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<div id="example_NewTripleDESCipher" class="toggle">
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<div class="collapsed">
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<p class="exampleHeading toggleButton">▹ <span class="text">Example</span></p>
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</div>
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<div class="expanded">
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<p class="exampleHeading toggleButton">▾ <span class="text">Example</span></p>
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<p>Code:</p>
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<pre class="code">
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<span class="comment">// NewTripleDESCipher can also be used when EDE2 is required by</span>
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<span class="comment">// duplicating the first 8 bytes of the 16-byte key.</span>
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ede2Key := []byte("example key 1234")
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var tripleDESKey []byte
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tripleDESKey = append(tripleDESKey, ede2Key[:16]...)
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tripleDESKey = append(tripleDESKey, ede2Key[:8]...)
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_, err := des.NewTripleDESCipher(tripleDESKey)
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if err != nil {
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panic(err)
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}
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<span class="comment">// See crypto/cipher for how to use a cipher.Block for encryption and</span>
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<span class="comment">// decryption.</span>
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</pre>
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</div>
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</div>
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<h2 id="KeySizeError">type <a href="http://localhost:6060/src/crypto/des/cipher.go?s=266:287#L5">KeySizeError</a></h2>
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<pre>type KeySizeError <a href="../../builtin/index.html#int">int</a></pre>
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<h3 id="KeySizeError.Error">func (KeySizeError) <a href="http://localhost:6060/src/crypto/des/cipher.go?s=289:325#L7">Error</a></h3>
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<pre>func (k <a href="index.html#KeySizeError">KeySizeError</a>) Error() <a href="../../builtin/index.html#string">string</a></pre>
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<div id="footer">
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Build version go1.6.<br>
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Except as <a href="https://developers.google.com/site-policies#restrictions">noted</a>,
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the content of this page is licensed under the
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Creative Commons Attribution 3.0 License,
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and code is licensed under a <a href="http://localhost:6060/LICENSE">BSD license</a>.<br>
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