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<h1>Package rc4</h1>
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<div id="short-nav"> <dl> <dd><code>import "crypto/rc4"</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 rc4 implements RC4 encryption, as defined in Bruce Schneier'sApplied Cryptography.</p>
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<div id="pkg-index" class="toggleVisible"> <div class="collapsed"> <h2 class="toggleButton" title="Click to show Index section">Index ▹</h2> </div> <div class="expanded"> <h2 class="toggleButton" title="Click to hide Index section">Index ▾</h2>
<!-- 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#Cipher">type Cipher</a></dd> <dd> <a href="index.html#NewCipher">func NewCipher(key []byte) (*Cipher, error)</a></dd> <dd> <a href="index.html#Cipher.Reset">func (c *Cipher) Reset()</a></dd> <dd> <a href="index.html#Cipher.XORKeyStream">func (c *Cipher) XORKeyStream(dst, src []byte)</a></dd> <dd><a href="index.html#KeySizeError">type KeySizeError</a></dd> <dd> <a href="index.html#KeySizeError.Error">func (k KeySizeError) Error() string</a></dd> <dd><a href="index.html#pkg-note-BUG">Bugs</a></dd> </dl> </div><!-- #manual-nav -->
<h4>Package files</h4> <p> <span style="font-size:90%"> <a href="http://localhost:6060/src/crypto/rc4/rc4.go">rc4.go</a> <a href="http://localhost:6060/src/crypto/rc4/rc4_asm.go">rc4_asm.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="Cipher">type <a href="http://localhost:6060/src/crypto/rc4/rc4.go?s=457:509#L5">Cipher</a></h2> <pre>type Cipher struct { <span class="comment">// contains filtered or unexported fields</span>}</pre> <p>A Cipher is an instance of RC4 using a particular key.</p>
<h3 id="NewCipher">func <a href="http://localhost:6060/src/crypto/rc4/rc4.go?s=769:812#L18">NewCipher</a></h3> <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> <p>NewCipher creates and returns a new Cipher. The key argument should be theRC4 key, at least 1 byte and at most 256 bytes.</p>
<h3 id="Cipher.Reset">func (*Cipher) <a href="http://localhost:6060/src/crypto/rc4/rc4.go?s=1174:1198#L37">Reset</a></h3> <pre>func (c *<a href="index.html#Cipher">Cipher</a>) Reset()</pre> <p>Reset zeros the key data so that it will no longer appear in theprocess's memory.</p>
<h3 id="Cipher.XORKeyStream">func (*Cipher) <a href="http://localhost:6060/src/crypto/rc4/rc4_asm.go?s=433:479#L3">XORKeyStream</a></h3> <pre>func (c *<a href="index.html#Cipher">Cipher</a>) XORKeyStream(dst, src []<a href="../../builtin/index.html#byte">byte</a>)</pre> <p>XORKeyStream sets dst to the result of XORing src with the key stream.Dst and src may be the same slice but otherwise should not overlap.</p>
<h2 id="KeySizeError">type <a href="http://localhost:6060/src/crypto/rc4/rc4.go?s=511:532#L10">KeySizeError</a></h2> <pre>type KeySizeError <a href="../../builtin/index.html#int">int</a></pre>
<h3 id="KeySizeError.Error">func (KeySizeError) <a href="http://localhost:6060/src/crypto/rc4/rc4.go?s=534:570#L12">Error</a></h3> <pre>func (k <a href="index.html#KeySizeError">KeySizeError</a>) Error() <a href="../../builtin/index.html#string">string</a></pre>
<h2 id="pkg-note-BUG">Bugs</h2> <ul style="list-style: none; padding: 0;"> <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 makeit a poor choice for new protocols.</li> </ul>
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