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329 lines
8.7 KiB
329 lines
8.7 KiB
<!DOCTYPE html>
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<title>rc4 - 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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<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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<a href="index.html#" id="menu-button"><span id="menu-button-arrow">▽</span></a>
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<form method="GET" action="http://localhost:6060/search">
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<a href="http://localhost:6060/doc/">Documents</a>
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<a href="http://localhost:6060/pkg/">Packages</a>
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<a href="http://localhost:6060/project/">The Project</a>
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<div id="page" class="wide">
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<div class="container">
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<h1>Package rc4</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/rc4"</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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</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 rc4 implements RC4 encryption, as defined in Bruce Schneier's
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Applied Cryptography.
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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#Cipher">type Cipher</a></dd>
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<dd> <a href="index.html#NewCipher">func NewCipher(key []byte) (*Cipher, error)</a></dd>
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<dd> <a href="index.html#Cipher.Reset">func (c *Cipher) Reset()</a></dd>
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<dd> <a href="index.html#Cipher.XORKeyStream">func (c *Cipher) XORKeyStream(dst, src []byte)</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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<dd><a href="index.html#pkg-note-BUG">Bugs</a></dd>
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</dl>
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</div><!-- #manual-nav -->
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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/rc4/rc4.go">rc4.go</a>
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<a href="http://localhost:6060/src/crypto/rc4/rc4_asm.go">rc4_asm.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="Cipher">type <a href="http://localhost:6060/src/crypto/rc4/rc4.go?s=457:509#L5">Cipher</a></h2>
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<pre>type Cipher struct {
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<span class="comment">// contains filtered or unexported fields</span>
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}</pre>
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<p>
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A Cipher is an instance of RC4 using a particular key.
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</p>
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<h3 id="NewCipher">func <a href="http://localhost:6060/src/crypto/rc4/rc4.go?s=769:812#L18">NewCipher</a></h3>
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<pre>func NewCipher(key []<a href="../../builtin/index.html#byte">byte</a>) (*<a href="index.html#Cipher">Cipher</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. The key argument should be the
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RC4 key, at least 1 byte and at most 256 bytes.
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</p>
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<h3 id="Cipher.Reset">func (*Cipher) <a href="http://localhost:6060/src/crypto/rc4/rc4.go?s=1174:1198#L37">Reset</a></h3>
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<pre>func (c *<a href="index.html#Cipher">Cipher</a>) Reset()</pre>
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<p>
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Reset zeros the key data so that it will no longer appear in the
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process's memory.
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</p>
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<h3 id="Cipher.XORKeyStream">func (*Cipher) <a href="http://localhost:6060/src/crypto/rc4/rc4_asm.go?s=433:479#L3">XORKeyStream</a></h3>
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<pre>func (c *<a href="index.html#Cipher">Cipher</a>) XORKeyStream(dst, src []<a href="../../builtin/index.html#byte">byte</a>)</pre>
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<p>
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XORKeyStream sets dst to the result of XORing src with the key stream.
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Dst and src may be the same slice but otherwise should not overlap.
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</p>
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<h2 id="KeySizeError">type <a href="http://localhost:6060/src/crypto/rc4/rc4.go?s=511:532#L10">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/rc4/rc4.go?s=534:570#L12">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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<h2 id="pkg-note-BUG">Bugs</h2>
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<ul style="list-style: none; padding: 0;">
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<li><a href="http://localhost:6060/src/crypto/rc4/rc4.go?s=271:379#L1">☞</a> RC4 is in common use but has design weaknesses that make
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it a poor choice for new protocols.
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</li>
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</ul>
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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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