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<a id='L7' name='L7'></a><title>Verify (YACASL2のインストール)</title>
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<a id='L43' name='L43'></a><span id="Verify"></span><div class="header">
<a id='L44' name='L44'></a><p>
<a id='L45' name='L45'></a>Next: <a href="Expand.html" accesskey="n" rel="next">Expand</a>, Previous: <a href="Download.html" accesskey="p" rel="prev">Download</a>, Up: <a href="install.html" accesskey="u" rel="up">install</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>]</p>
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<a id='L48' name='L48'></a><span id="YACASL2huairunoJian-Zheng-"></span><h3 class="section">2.2 YACASL2ファイルの検証</h3>
<a id='L49' name='L49'></a>
<a id='L50' name='L50'></a><p>ダウンロードが完了したら、圧縮ファイルが改竄されていないか検証します。検証には、GnuPG分離署名か、MD5ハッシュ値を使います。
<a id='L51' name='L51'></a></p>
<a id='L52' name='L52'></a><span id="GnuPGFen-Li-Shu-Ming-denoJian-Zheng-"></span><h4 class="subsection">2.2.1 GnuPG分離署名での検証</h4>
<a id='L53' name='L53'></a>
<a id='L54' name='L54'></a><p>GnuPGの<code>gpg</code>で圧縮ファイルを検証します。この検証を行うには、GnuPGがインストールされ、自分の秘密鍵と公開鍵のペアが作成されている必要があります。
<a id='L55' name='L55'></a></p>
<a id='L56' name='L56'></a><div class="example">
<a id='L57' name='L57'></a><pre class="example">$ <kbd>gpg --verify yacasl2.tar.xz.asc</kbd>
<a id='L58' name='L58'></a>gpg: Signature made Sat Oct 27 02:17:16 2012 JST using RSA key ID 25B62DD1
<a id='L59' name='L59'></a>gpg: Can't check signature: public key not found
<a id='L60' name='L60'></a>$ <kbd>gpg --recv-keys 25B62DD1</kbd>
<a id='L61' name='L61'></a>gpg: requesting key 25B62DD1 from hkp server keys.gnupg.net
<a id='L62' name='L62'></a>gpg: key 25B62DD1: public key &quot;j8takagi &lt;j8takagi@nifty.com&gt;&quot; imported
<a id='L63' name='L63'></a>gpg: Total number processed: 1
<a id='L64' name='L64'></a>gpg: imported: 1 (RSA: 1)
<a id='L65' name='L65'></a>
<a id='L66' name='L66'></a>$ <kbd>gpg --lsign-key 25B62DD1</kbd>
<a id='L67' name='L67'></a>
<a id='L68' name='L68'></a>pub 2048R/25B62DD1 created: 2012-09-29 expires: never usage: SC
<a id='L69' name='L69'></a> trust: unknown validity: full
<a id='L70' name='L70'></a>sub 2048R/92E25C29 created: 2012-09-29 expires: never usage: E
<a id='L71' name='L71'></a>[ full ] (1). j8takagi &lt;j8takagi@nifty.com&gt;
<a id='L72' name='L72'></a>
<a id='L73' name='L73'></a>
<a id='L74' name='L74'></a>pub 2048R/25B62DD1 created: 2012-09-29 expires: never usage: SC
<a id='L75' name='L75'></a> trust: unknown validity: full
<a id='L76' name='L76'></a> Primary key fingerprint: ...
<a id='L77' name='L77'></a>
<a id='L78' name='L78'></a> .* &lt;.*@.*&gt;
<a id='L79' name='L79'></a>
<a id='L80' name='L80'></a>Are you sure that you want to sign this key with your
<a id='L81' name='L81'></a>key &quot;.* &lt;.*@.*&gt;&quot;
<a id='L82' name='L82'></a>
<a id='L83' name='L83'></a>The signature will be marked as non-exportable.
<a id='L84' name='L84'></a>
<a id='L85' name='L85'></a>Really sign? (y/N) <kbd>y</kbd>
<a id='L86' name='L86'></a>
<a id='L87' name='L87'></a>You need a passphrase to unlock the secret key for
<a id='L88' name='L88'></a>user: &quot;.* &lt;.*@.*&gt;&quot;
<a id='L89' name='L89'></a>2048-bit RSA key, ID ........, created 20..-..-..
<a id='L90' name='L90'></a>
<a id='L91' name='L91'></a>&lt;input password&gt; <kbd>password</kbd>
<a id='L92' name='L92'></a>
<a id='L93' name='L93'></a>$ <kbd>gpg --verify yacasl2.tar.xz.asc</kbd>
<a id='L94' name='L94'></a>gpg: Signature made Sat Oct 27 02:17:16 2012 JST using RSA key ID 25B62DD1
<a id='L95' name='L95'></a>gpg: checking the trustdb
<a id='L96' name='L96'></a>gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model
<a id='L97' name='L97'></a>gpg: depth: 0 valid: 1 signed: 4 trust: 0-, 0q, 0n, 0m, 0f, 1u
<a id='L98' name='L98'></a>gpg: depth: 1 valid: 4 signed: 0 trust: 4-, 0q, 0n, 0m, 0f, 0u
<a id='L99' name='L99'></a>gpg: Good signature from &quot;j8takagi &lt;j8takagi@nifty.com&gt;&quot;
<a id='L100' name='L100'></a></pre></div>
<a id='L101' name='L101'></a>
<a id='L102' name='L102'></a><span id="MD5hatusiyuZhi-denoJian-Zheng-"></span><h4 class="subsection">2.2.2 MD5ハッシュ値での検証</h4>
<a id='L103' name='L103'></a>
<a id='L104' name='L104'></a><p><code>openssl</code>と<code>diff</code>で圧縮ファイルを検証します。
<a id='L105' name='L105'></a></p>
<a id='L106' name='L106'></a><div class="example">
<a id='L107' name='L107'></a><pre class="example">$ <kbd>openssl md5 yacasl2.tar.gz | diff -s yacasl2.tar.gz.md5sum -</kbd>
<a id='L108' name='L108'></a>Files yacasl2.tar.gz.md5sum and - are identical
<a id='L109' name='L109'></a></pre></div>
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