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  <div class="section" id="arc4-vector-creation">
<h1>ARC4 vector creation<a class="headerlink" href="#arc4-vector-creation" title="Permalink to this headline"></a></h1>
<p>This page documents the code that was used to generate the ARC4 test
vectors for key lengths not available in RFC 6229. All the vectors
were generated using OpenSSL and verified with Go.</p>
<div class="section" id="creation">
<h2>Creation<a class="headerlink" href="#creation" title="Permalink to this headline"></a></h2>
<p><code class="docutils literal"><span class="pre">cryptography</span></code> was modified to support ARC4 key lengths not listed
in RFC 6229. Then the following Python script was run to generate the
vector files.</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="c1"># This file is dual licensed under the terms of the Apache License, Version</span>
<span class="c1"># 2.0, and the BSD License. See the LICENSE file in the root of this repository</span>
<span class="c1"># for complete details.</span>

<span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">absolute_import</span><span class="p">,</span> <span class="n">division</span><span class="p">,</span> <span class="n">print_function</span>

<span class="kn">import</span> <span class="nn">binascii</span>

<span class="kn">from</span> <span class="nn">cryptography.hazmat.backends</span> <span class="k">import</span> <span class="n">default_backend</span>
<span class="kn">from</span> <span class="nn">cryptography.hazmat.primitives</span> <span class="k">import</span> <span class="n">ciphers</span>
<span class="kn">from</span> <span class="nn">cryptography.hazmat.primitives.ciphers</span> <span class="k">import</span> <span class="n">algorithms</span>


<span class="n">_RFC6229_KEY_MATERIALS</span> <span class="o">=</span> <span class="p">[</span>
    <span class="p">(</span><span class="kc">True</span><span class="p">,</span>
     <span class="mi">8</span> <span class="o">*</span> <span class="s1">&#39;0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20&#39;</span><span class="p">),</span>
    <span class="p">(</span><span class="kc">False</span><span class="p">,</span>
     <span class="mi">8</span> <span class="o">*</span> <span class="s1">&#39;1ada31d5cf688221c109163908ebe51debb46227c6cc8b37641910833222772a&#39;</span><span class="p">)</span>
<span class="p">]</span>


<span class="n">_RFC6229_OFFSETS</span> <span class="o">=</span> <span class="p">[</span>
    <span class="mi">0</span><span class="p">,</span>
    <span class="mi">16</span><span class="p">,</span>
    <span class="mi">240</span><span class="p">,</span>
    <span class="mi">256</span><span class="p">,</span>
    <span class="mi">496</span><span class="p">,</span>
    <span class="mi">512</span><span class="p">,</span>
    <span class="mi">752</span><span class="p">,</span>
    <span class="mi">768</span><span class="p">,</span>
    <span class="mi">1008</span><span class="p">,</span>
    <span class="mi">1024</span><span class="p">,</span>
    <span class="mi">1520</span><span class="p">,</span>
    <span class="mi">1536</span><span class="p">,</span>
    <span class="mi">2032</span><span class="p">,</span>
    <span class="mi">2048</span><span class="p">,</span>
    <span class="mi">3056</span><span class="p">,</span>
    <span class="mi">3072</span><span class="p">,</span>
    <span class="mi">4080</span><span class="p">,</span>
    <span class="mi">4096</span>
<span class="p">]</span>


<span class="n">_SIZES_TO_GENERATE</span> <span class="o">=</span> <span class="p">[</span>
    <span class="mi">160</span>
<span class="p">]</span>


<span class="k">def</span> <span class="nf">_key_for_size</span><span class="p">(</span><span class="n">size</span><span class="p">,</span> <span class="n">keyinfo</span><span class="p">):</span>
    <span class="n">msb</span><span class="p">,</span> <span class="n">key</span> <span class="o">=</span> <span class="n">keyinfo</span>
    <span class="k">if</span> <span class="n">msb</span><span class="p">:</span>
        <span class="k">return</span> <span class="n">key</span><span class="p">[:</span><span class="n">size</span> <span class="o">//</span> <span class="mi">4</span><span class="p">]</span>
    <span class="k">else</span><span class="p">:</span>
        <span class="k">return</span> <span class="n">key</span><span class="p">[</span><span class="o">-</span><span class="n">size</span> <span class="o">//</span> <span class="mi">4</span><span class="p">:]</span>


<span class="k">def</span> <span class="nf">_build_vectors</span><span class="p">():</span>
    <span class="n">count</span> <span class="o">=</span> <span class="mi">0</span>
    <span class="n">output</span> <span class="o">=</span> <span class="p">[]</span>
    <span class="n">key</span> <span class="o">=</span> <span class="kc">None</span>
    <span class="n">plaintext</span> <span class="o">=</span> <span class="n">binascii</span><span class="o">.</span><span class="n">unhexlify</span><span class="p">(</span><span class="mi">32</span> <span class="o">*</span> <span class="s1">&#39;0&#39;</span><span class="p">)</span>
    <span class="k">for</span> <span class="n">size</span> <span class="ow">in</span> <span class="n">_SIZES_TO_GENERATE</span><span class="p">:</span>
        <span class="k">for</span> <span class="n">keyinfo</span> <span class="ow">in</span> <span class="n">_RFC6229_KEY_MATERIALS</span><span class="p">:</span>
            <span class="n">key</span> <span class="o">=</span> <span class="n">_key_for_size</span><span class="p">(</span><span class="n">size</span><span class="p">,</span> <span class="n">keyinfo</span><span class="p">)</span>
            <span class="n">cipher</span> <span class="o">=</span> <span class="n">ciphers</span><span class="o">.</span><span class="n">Cipher</span><span class="p">(</span>
                <span class="n">algorithms</span><span class="o">.</span><span class="n">ARC4</span><span class="p">(</span><span class="n">binascii</span><span class="o">.</span><span class="n">unhexlify</span><span class="p">(</span><span class="n">key</span><span class="p">)),</span>
                <span class="kc">None</span><span class="p">,</span>
                <span class="n">default_backend</span><span class="p">())</span>
            <span class="n">encryptor</span> <span class="o">=</span> <span class="n">cipher</span><span class="o">.</span><span class="n">encryptor</span><span class="p">()</span>
            <span class="n">current_offset</span> <span class="o">=</span> <span class="mi">0</span>
            <span class="k">for</span> <span class="n">offset</span> <span class="ow">in</span> <span class="n">_RFC6229_OFFSETS</span><span class="p">:</span>
                <span class="k">if</span> <span class="n">offset</span> <span class="o">%</span> <span class="mi">16</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">:</span>
                    <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span>
                        <span class="s2">&quot;Offset </span><span class="si">{}</span><span class="s2"> is not evenly divisible by 16&quot;</span>
                        <span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">offset</span><span class="p">))</span>
                <span class="k">while</span> <span class="n">current_offset</span> <span class="o">&lt;</span> <span class="n">offset</span><span class="p">:</span>
                    <span class="n">encryptor</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">plaintext</span><span class="p">)</span>
                    <span class="n">current_offset</span> <span class="o">+=</span> <span class="nb">len</span><span class="p">(</span><span class="n">plaintext</span><span class="p">)</span>
                <span class="n">output</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">&quot;</span><span class="se">\n</span><span class="s2">COUNT = </span><span class="si">{}</span><span class="s2">&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">count</span><span class="p">))</span>
                <span class="n">count</span> <span class="o">+=</span> <span class="mi">1</span>
                <span class="n">output</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">&quot;KEY = </span><span class="si">{}</span><span class="s2">&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">key</span><span class="p">))</span>
                <span class="n">output</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">&quot;OFFSET = </span><span class="si">{}</span><span class="s2">&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">offset</span><span class="p">))</span>
                <span class="n">output</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">&quot;PLAINTEXT = </span><span class="si">{}</span><span class="s2">&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span>
                    <span class="n">binascii</span><span class="o">.</span><span class="n">hexlify</span><span class="p">(</span><span class="n">plaintext</span><span class="p">)))</span>
                <span class="n">output</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">&quot;CIPHERTEXT = </span><span class="si">{}</span><span class="s2">&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span>
                    <span class="n">binascii</span><span class="o">.</span><span class="n">hexlify</span><span class="p">(</span><span class="n">encryptor</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">plaintext</span><span class="p">))))</span>
                <span class="n">current_offset</span> <span class="o">+=</span> <span class="nb">len</span><span class="p">(</span><span class="n">plaintext</span><span class="p">)</span>
            <span class="k">assert</span> <span class="ow">not</span> <span class="n">encryptor</span><span class="o">.</span><span class="n">finalize</span><span class="p">()</span>
    <span class="k">return</span> <span class="s2">&quot;</span><span class="se">\n</span><span class="s2">&quot;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">output</span><span class="p">)</span>


<span class="k">def</span> <span class="nf">_write_file</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">filename</span><span class="p">):</span>
    <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s1">&#39;w&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>
        <span class="n">f</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>


<span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s1">&#39;__main__&#39;</span><span class="p">:</span>
    <span class="n">_write_file</span><span class="p">(</span><span class="n">_build_vectors</span><span class="p">(),</span> <span class="s1">&#39;arc4.txt&#39;</span><span class="p">)</span>
</pre></div>
</div>
<p>Download link: <a class="reference download internal" href="../../_downloads/generate_arc4.py" download=""><code class="xref download docutils literal"><span class="pre">generate_arc4.py</span></code></a></p>
</div>
<div class="section" id="verification">
<h2>Verification<a class="headerlink" href="#verification" title="Permalink to this headline"></a></h2>
<p>The following Go code was used to verify the vectors.</p>
<div class="highlight-go"><div class="highlight"><pre><span></span><span class="kn">package</span> <span class="nx">main</span>

<span class="kn">import</span> <span class="p">(</span>
	<span class="s">&quot;bufio&quot;</span>
	<span class="s">&quot;bytes&quot;</span>
	<span class="s">&quot;crypto/rc4&quot;</span>
	<span class="s">&quot;encoding/hex&quot;</span>
	<span class="s">&quot;fmt&quot;</span>
	<span class="s">&quot;os&quot;</span>
	<span class="s">&quot;strconv&quot;</span>
	<span class="s">&quot;strings&quot;</span>
<span class="p">)</span>

<span class="kd">func</span> <span class="nx">unhexlify</span><span class="p">(</span><span class="nx">s</span> <span class="kt">string</span><span class="p">)</span> <span class="p">[]</span><span class="kt">byte</span> <span class="p">{</span>
	<span class="nx">bytes</span><span class="p">,</span> <span class="nx">err</span> <span class="o">:=</span> <span class="nx">hex</span><span class="p">.</span><span class="nx">DecodeString</span><span class="p">(</span><span class="nx">s</span><span class="p">)</span>
	<span class="k">if</span> <span class="nx">err</span> <span class="o">!=</span> <span class="kc">nil</span> <span class="p">{</span>
		<span class="nb">panic</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span>
	<span class="p">}</span>
	<span class="k">return</span> <span class="nx">bytes</span>
<span class="p">}</span>

<span class="kd">type</span> <span class="nx">vectorArgs</span> <span class="kd">struct</span> <span class="p">{</span>
	<span class="nx">count</span>      <span class="kt">string</span>
	<span class="nx">offset</span>     <span class="kt">uint64</span>
	<span class="nx">key</span>        <span class="kt">string</span>
	<span class="nx">plaintext</span>  <span class="kt">string</span>
	<span class="nx">ciphertext</span> <span class="kt">string</span>
<span class="p">}</span>

<span class="kd">type</span> <span class="nx">vectorVerifier</span> <span class="kd">interface</span> <span class="p">{</span>
	<span class="nx">validate</span><span class="p">(</span><span class="nx">count</span> <span class="kt">string</span><span class="p">,</span> <span class="nx">offset</span> <span class="kt">uint64</span><span class="p">,</span> <span class="nx">key</span><span class="p">,</span> <span class="nx">plaintext</span><span class="p">,</span> <span class="nx">expectedCiphertext</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">)</span>
<span class="p">}</span>

<span class="kd">type</span> <span class="nx">arc4Verifier</span> <span class="kd">struct</span><span class="p">{}</span>

<span class="kd">func</span> <span class="p">(</span><span class="nx">o</span> <span class="nx">arc4Verifier</span><span class="p">)</span> <span class="nx">validate</span><span class="p">(</span><span class="nx">count</span> <span class="kt">string</span><span class="p">,</span> <span class="nx">offset</span> <span class="kt">uint64</span><span class="p">,</span> <span class="nx">key</span><span class="p">,</span> <span class="nx">plaintext</span><span class="p">,</span> <span class="nx">expectedCiphertext</span> <span class="p">[]</span><span class="kt">byte</span><span class="p">)</span> <span class="p">{</span>
	<span class="k">if</span> <span class="nx">offset</span><span class="o">%</span><span class="mi">16</span> <span class="o">!=</span> <span class="mi">0</span> <span class="o">||</span> <span class="nb">len</span><span class="p">(</span><span class="nx">plaintext</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">16</span> <span class="o">||</span> <span class="nb">len</span><span class="p">(</span><span class="nx">expectedCiphertext</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">16</span> <span class="p">{</span>
		<span class="nb">panic</span><span class="p">(</span><span class="nx">fmt</span><span class="p">.</span><span class="nx">Errorf</span><span class="p">(</span><span class="s">&quot;Unexpected input value encountered: offset=%v; len(plaintext)=%v; len(expectedCiphertext)=%v&quot;</span><span class="p">,</span>
			<span class="nx">offset</span><span class="p">,</span>
			<span class="nb">len</span><span class="p">(</span><span class="nx">plaintext</span><span class="p">),</span>
			<span class="nb">len</span><span class="p">(</span><span class="nx">expectedCiphertext</span><span class="p">)))</span>
	<span class="p">}</span>
	<span class="nx">stream</span><span class="p">,</span> <span class="nx">err</span> <span class="o">:=</span> <span class="nx">rc4</span><span class="p">.</span><span class="nx">NewCipher</span><span class="p">(</span><span class="nx">key</span><span class="p">)</span>
	<span class="k">if</span> <span class="nx">err</span> <span class="o">!=</span> <span class="kc">nil</span> <span class="p">{</span>
		<span class="nb">panic</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span>
	<span class="p">}</span>

	<span class="kd">var</span> <span class="nx">currentOffset</span> <span class="kt">uint64</span> <span class="p">=</span> <span class="mi">0</span>
	<span class="nx">ciphertext</span> <span class="o">:=</span> <span class="nb">make</span><span class="p">([]</span><span class="kt">byte</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="nx">plaintext</span><span class="p">))</span>
	<span class="k">for</span> <span class="nx">currentOffset</span> <span class="o">&lt;=</span> <span class="nx">offset</span> <span class="p">{</span>
		<span class="nx">stream</span><span class="p">.</span><span class="nx">XORKeyStream</span><span class="p">(</span><span class="nx">ciphertext</span><span class="p">,</span> <span class="nx">plaintext</span><span class="p">)</span>
		<span class="nx">currentOffset</span> <span class="o">+=</span> <span class="nb">uint64</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="nx">plaintext</span><span class="p">))</span>
	<span class="p">}</span>
	<span class="k">if</span> <span class="p">!</span><span class="nx">bytes</span><span class="p">.</span><span class="nx">Equal</span><span class="p">(</span><span class="nx">ciphertext</span><span class="p">,</span> <span class="nx">expectedCiphertext</span><span class="p">)</span> <span class="p">{</span>
		<span class="nb">panic</span><span class="p">(</span><span class="nx">fmt</span><span class="p">.</span><span class="nx">Errorf</span><span class="p">(</span><span class="s">&quot;vector mismatch @ COUNT = %s:\n  %s != %s\n&quot;</span><span class="p">,</span>
			<span class="nx">count</span><span class="p">,</span>
			<span class="nx">hex</span><span class="p">.</span><span class="nx">EncodeToString</span><span class="p">(</span><span class="nx">expectedCiphertext</span><span class="p">),</span>
			<span class="nx">hex</span><span class="p">.</span><span class="nx">EncodeToString</span><span class="p">(</span><span class="nx">ciphertext</span><span class="p">)))</span>
	<span class="p">}</span>
<span class="p">}</span>

<span class="kd">func</span> <span class="nx">validateVectors</span><span class="p">(</span><span class="nx">verifier</span> <span class="nx">vectorVerifier</span><span class="p">,</span> <span class="nx">filename</span> <span class="kt">string</span><span class="p">)</span> <span class="p">{</span>
	<span class="nx">vectors</span><span class="p">,</span> <span class="nx">err</span> <span class="o">:=</span> <span class="nx">os</span><span class="p">.</span><span class="nx">Open</span><span class="p">(</span><span class="nx">filename</span><span class="p">)</span>
	<span class="k">if</span> <span class="nx">err</span> <span class="o">!=</span> <span class="kc">nil</span> <span class="p">{</span>
		<span class="nb">panic</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span>
	<span class="p">}</span>
	<span class="k">defer</span> <span class="nx">vectors</span><span class="p">.</span><span class="nx">Close</span><span class="p">()</span>

	<span class="kd">var</span> <span class="nx">segments</span> <span class="p">[]</span><span class="kt">string</span>
	<span class="kd">var</span> <span class="nx">vector</span> <span class="o">*</span><span class="nx">vectorArgs</span>

	<span class="nx">scanner</span> <span class="o">:=</span> <span class="nx">bufio</span><span class="p">.</span><span class="nx">NewScanner</span><span class="p">(</span><span class="nx">vectors</span><span class="p">)</span>
	<span class="k">for</span> <span class="nx">scanner</span><span class="p">.</span><span class="nx">Scan</span><span class="p">()</span> <span class="p">{</span>
		<span class="nx">segments</span> <span class="p">=</span> <span class="nx">strings</span><span class="p">.</span><span class="nx">Split</span><span class="p">(</span><span class="nx">scanner</span><span class="p">.</span><span class="nx">Text</span><span class="p">(),</span> <span class="s">&quot; = &quot;</span><span class="p">)</span>

		<span class="k">switch</span> <span class="p">{</span>
		<span class="k">case</span> <span class="nx">strings</span><span class="p">.</span><span class="nx">ToUpper</span><span class="p">(</span><span class="nx">segments</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">==</span> <span class="s">&quot;COUNT&quot;</span><span class="p">:</span>
			<span class="k">if</span> <span class="nx">vector</span> <span class="o">!=</span> <span class="kc">nil</span> <span class="p">{</span>
				<span class="nx">verifier</span><span class="p">.</span><span class="nx">validate</span><span class="p">(</span><span class="nx">vector</span><span class="p">.</span><span class="nx">count</span><span class="p">,</span>
					<span class="nx">vector</span><span class="p">.</span><span class="nx">offset</span><span class="p">,</span>
					<span class="nx">unhexlify</span><span class="p">(</span><span class="nx">vector</span><span class="p">.</span><span class="nx">key</span><span class="p">),</span>
					<span class="nx">unhexlify</span><span class="p">(</span><span class="nx">vector</span><span class="p">.</span><span class="nx">plaintext</span><span class="p">),</span>
					<span class="nx">unhexlify</span><span class="p">(</span><span class="nx">vector</span><span class="p">.</span><span class="nx">ciphertext</span><span class="p">))</span>
			<span class="p">}</span>
			<span class="nx">vector</span> <span class="p">=</span> <span class="o">&amp;</span><span class="nx">vectorArgs</span><span class="p">{</span><span class="nx">count</span><span class="p">:</span> <span class="nx">segments</span><span class="p">[</span><span class="mi">1</span><span class="p">]}</span>
		<span class="k">case</span> <span class="nx">strings</span><span class="p">.</span><span class="nx">ToUpper</span><span class="p">(</span><span class="nx">segments</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">==</span> <span class="s">&quot;OFFSET&quot;</span><span class="p">:</span>
			<span class="nx">vector</span><span class="p">.</span><span class="nx">offset</span><span class="p">,</span> <span class="nx">err</span> <span class="p">=</span> <span class="nx">strconv</span><span class="p">.</span><span class="nx">ParseUint</span><span class="p">(</span><span class="nx">segments</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="mi">10</span><span class="p">,</span> <span class="mi">64</span><span class="p">)</span>
			<span class="k">if</span> <span class="nx">err</span> <span class="o">!=</span> <span class="kc">nil</span> <span class="p">{</span>
				<span class="nb">panic</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span>
			<span class="p">}</span>
		<span class="k">case</span> <span class="nx">strings</span><span class="p">.</span><span class="nx">ToUpper</span><span class="p">(</span><span class="nx">segments</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">==</span> <span class="s">&quot;KEY&quot;</span><span class="p">:</span>
			<span class="nx">vector</span><span class="p">.</span><span class="nx">key</span> <span class="p">=</span> <span class="nx">segments</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
		<span class="k">case</span> <span class="nx">strings</span><span class="p">.</span><span class="nx">ToUpper</span><span class="p">(</span><span class="nx">segments</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">==</span> <span class="s">&quot;PLAINTEXT&quot;</span><span class="p">:</span>
			<span class="nx">vector</span><span class="p">.</span><span class="nx">plaintext</span> <span class="p">=</span> <span class="nx">segments</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
		<span class="k">case</span> <span class="nx">strings</span><span class="p">.</span><span class="nx">ToUpper</span><span class="p">(</span><span class="nx">segments</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">==</span> <span class="s">&quot;CIPHERTEXT&quot;</span><span class="p">:</span>
			<span class="nx">vector</span><span class="p">.</span><span class="nx">ciphertext</span> <span class="p">=</span> <span class="nx">segments</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
		<span class="p">}</span>
	<span class="p">}</span>
	<span class="k">if</span> <span class="nx">vector</span> <span class="o">!=</span> <span class="kc">nil</span> <span class="p">{</span>
		<span class="nx">verifier</span><span class="p">.</span><span class="nx">validate</span><span class="p">(</span><span class="nx">vector</span><span class="p">.</span><span class="nx">count</span><span class="p">,</span>
			<span class="nx">vector</span><span class="p">.</span><span class="nx">offset</span><span class="p">,</span>
			<span class="nx">unhexlify</span><span class="p">(</span><span class="nx">vector</span><span class="p">.</span><span class="nx">key</span><span class="p">),</span>
			<span class="nx">unhexlify</span><span class="p">(</span><span class="nx">vector</span><span class="p">.</span><span class="nx">plaintext</span><span class="p">),</span>
			<span class="nx">unhexlify</span><span class="p">(</span><span class="nx">vector</span><span class="p">.</span><span class="nx">ciphertext</span><span class="p">))</span>
	<span class="p">}</span>
<span class="p">}</span>

<span class="kd">func</span> <span class="nx">main</span><span class="p">()</span> <span class="p">{</span>
	<span class="nx">validateVectors</span><span class="p">(</span><span class="nx">arc4Verifier</span><span class="p">{},</span> <span class="s">&quot;vectors/cryptography_vectors/ciphers/ARC4/arc4.txt&quot;</span><span class="p">)</span>
	<span class="nx">fmt</span><span class="p">.</span><span class="nx">Println</span><span class="p">(</span><span class="s">&quot;ARC4 OK.&quot;</span><span class="p">)</span>
<span class="p">}</span>
</pre></div>
</div>
<p>Download link: <a class="reference download internal" href="../../_downloads/verify_arc4.go" download=""><code class="xref download docutils literal"><span class="pre">verify_arc4.go</span></code></a></p>
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<li><a class="reference internal" href="#">ARC4 vector creation</a><ul>
<li><a class="reference internal" href="#creation">Creation</a></li>
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