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<a id='L7' name='L7'></a>&lt;title&gt;Verify (YACASL2のインストール)&lt;/title&gt;
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<a id='L33' name='L33'></a>&lt;div class="section-level-extent" id="Verify"&gt;
<a id='L34' name='L34'></a>&lt;p class="nav-panel"&gt;
<a id='L35' name='L35'></a>&lt;span class="nav-button"&gt;&lt;span class="nav-label"&gt;Next: &lt;/span&gt;&lt;span class="nav-link"&gt;&lt;a href="Expand.html" accesskey="n" rel="next"&gt;YACASL2ファイルの展開&lt;/a&gt;&lt;/span&gt;&lt;/span&gt;, &lt;span class="nav-button"&gt;&lt;span class="nav-label"&gt;Previous: &lt;/span&gt;&lt;span class="nav-link"&gt;&lt;a href="Download.html" accesskey="p" rel="prev"&gt;YACASL2ファイルのダウンロード&lt;/a&gt;&lt;/span&gt;&lt;/span&gt;, &lt;span class="nav-button"&gt;&lt;span class="nav-label"&gt;Up: &lt;/span&gt;&lt;span class="nav-link"&gt;&lt;a href="install.html" accesskey="u" rel="up"&gt;インストールの手順&lt;/a&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class="nav-button"&gt; &amp;nbsp; &lt;/span&gt;&lt;span class="nav-button"&gt;[&lt;a href="index.html#SEC_Contents" title="Table of contents" rel="contents"&gt;Contents&lt;/a&gt;]&lt;/span&gt;&lt;/p&gt;
<a id='L36' name='L36'></a>&lt;hr&gt;
<a id='L37' name='L37'></a>&lt;h3 class="section" id="YACASL2_30d5_30a1_30a4_30eb_306e_691c_8a3c"&gt;&lt;span&gt;2.2 YACASL2ファイルの検証&lt;a class="copiable-link" href="#YACASL2_30d5_30a1_30a4_30eb_306e_691c_8a3c"&gt; &amp;para;&lt;/a&gt;&lt;/span&gt;&lt;/h3&gt;
<a id='L38' name='L38'></a>
<a id='L39' name='L39'></a>&lt;p&gt;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='L40' name='L40'></a>&lt;/p&gt;
<a id='L41' name='L41'></a>&lt;ul class="mini-toc"&gt;
<a id='L42' name='L42'></a>&lt;li&gt;&lt;a href="#GnuPG_5206_96e2_7f72_540d_3067_306e_691c_8a3c" accesskey="1"&gt;GnuPG分離署名での検証&lt;/a&gt;&lt;/li&gt;
<a id='L43' name='L43'></a>&lt;li&gt;&lt;a href="#MD5_30cf_30c3_30b7_30e5_5024_3067_306e_691c_8a3c" accesskey="2"&gt;MD5ハッシュ値での検証&lt;/a&gt;&lt;/li&gt;
<a id='L44' name='L44'></a>&lt;/ul&gt;
<a id='L45' name='L45'></a>&lt;div class="subsection-level-extent" id="GnuPG_5206_96e2_7f72_540d_3067_306e_691c_8a3c"&gt;
<a id='L46' name='L46'></a>&lt;h4 class="subsection"&gt;&lt;span&gt;2.2.1 GnuPG分離署名での検証&lt;a class="copiable-link" href="#GnuPG_5206_96e2_7f72_540d_3067_306e_691c_8a3c"&gt; &amp;para;&lt;/a&gt;&lt;/span&gt;&lt;/h4&gt;
<a id='L47' name='L47'></a>
<a id='L48' name='L48'></a>&lt;p&gt;GnuPGの&lt;code class="command"&gt;gpg&lt;/code&gt;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、自分用の秘密鍵が作成されている必要があります。
<a id='L49' name='L49'></a>また、あらかじめ&lt;samp class="file"&gt;tar.gz&lt;/samp&gt;または&lt;samp class="file"&gt;tar.xz&lt;/samp&gt;ファイルと、対応する検証用ファイル&lt;samp class="file"&gt;tar.gz.asc&lt;/samp&gt;または&lt;samp class="file"&gt;tar.xz.asc&lt;/samp&gt;ファイルを同じディレクトリーに保存し、そのディレクトリーに移動しておきます。
<a id='L50' name='L50'></a>&lt;/p&gt;
<a id='L51' name='L51'></a>&lt;p&gt;次の手順では&lt;code class="command"&gt;gpg --verify&lt;/code&gt;による検証を2回実行させています。1回目では検証に失敗する一方で、必要な鍵などの情報を得ています。その鍵を&lt;code class="command"&gt;gpg --recv-keys&lt;/code&gt;で取得し、&lt;code class="command"&gt;gpg --lsign-key&lt;/code&gt;でローカル署名した後、再度&lt;code class="command"&gt;gpg --verify&lt;/code&gt;による検証を行い、成功させています。
<a id='L52' name='L52'></a>&lt;/p&gt;
<a id='L53' name='L53'></a>&lt;div class="example"&gt;
<a id='L54' name='L54'></a>&lt;pre class="example-preformatted"&gt;$ &lt;kbd class="kbd"&gt;ls yacasl2.tar.gz*&lt;/kbd&gt;
<a id='L55' name='L55'></a>yacasl2.tar.gz  yacasl2.tar.gz.asc
<a id='L56' name='L56'></a>$ &lt;kbd class="kbd"&gt;gpg --verify yacasl2.tar.xz.asc&lt;/kbd&gt;
<a id='L57' name='L57'></a>gpg: assuming signed data in 'yacasl2.tar.gz'
<a id='L58' name='L58'></a>gpg: Signature made Tue 02 Jun 2026 01:14:17 AM JST
<a id='L59' name='L59'></a>gpg:                using EDDSA key 77EC282A2F7317EBFF7BFD067F593ED86D88E1D5
<a id='L60' name='L60'></a>gpg: Can't check signature: No public key
<a id='L61' name='L61'></a>$ &lt;kbd class="kbd"&gt;gpg --recv-keys 77EC282A2F7317EBFF7BFD067F593ED86D88E1D5&lt;/kbd&gt;
<a id='L62' name='L62'></a>gpg: key 7F593ED86D88E1D5: public key &amp;quot;j8takagi &amp;lt;j8takagi@nifty.com&amp;gt;&amp;quot; imported
<a id='L63' name='L63'></a>gpg: marginals needed: 3  completes needed: 1  trust model: pgp
<a id='L64' name='L64'></a>gpg: depth: 0  valid:   1  signed:   0  trust: 0-, 0q, 0n, 0m, 0f, 1u
<a id='L65' name='L65'></a>gpg: next trustdb check due at 2029-06-01
<a id='L66' name='L66'></a>gpg: Total number processed: 1
<a id='L67' name='L67'></a>gpg:               imported: 1
<a id='L68' name='L68'></a>$ &lt;kbd class="kbd"&gt;gpg --lsign-key 77EC282A2F7317EBFF7BFD067F593ED86D88E1D5&lt;/kbd&gt;
<a id='L69' name='L69'></a>
<a id='L70' name='L70'></a>pub  ed25519/7F593ED86D88E1D5
<a id='L71' name='L71'></a>     created: 2026-04-23  expires: 2031-04-30  usage: SC  
<a id='L72' name='L72'></a>     trust: unknown       validity: unknown
<a id='L73' name='L73'></a>sub  cv25519/B3433115DBD37726
<a id='L74' name='L74'></a>     created: 2026-04-23  expires: never       usage: E   
<a id='L75' name='L75'></a>[ unknown] (1). j8takagi &amp;lt;j8takagi@nifty.com&amp;gt;
<a id='L76' name='L76'></a>
<a id='L77' name='L77'></a>
<a id='L78' name='L78'></a>pub  ed25519/7F593ED86D88E1D5
<a id='L79' name='L79'></a>     created: 2026-04-23  expires: 2031-04-30  usage: SC  
<a id='L80' name='L80'></a>     trust: unknown       validity: unknown
<a id='L81' name='L81'></a> Primary key fingerprint: 77EC 282A 2F73 17EB FF7B  FD06 7F59 3ED8 6D88 E1D5
<a id='L82' name='L82'></a>
<a id='L83' name='L83'></a>     j8takagi &amp;lt;j8takagi@nifty.com&amp;gt;
<a id='L84' name='L84'></a>
<a id='L85' name='L85'></a>This key is due to expire on 2031-04-30.
<a id='L86' name='L86'></a>Are you sure that you want to sign this key with your
<a id='L87' name='L87'></a>key &amp;quot;j8takagi &amp;lt;j8takagi@nifty.com&amp;gt;&amp;quot; (4223493EBCB683A9)
<a id='L88' name='L88'></a>
<a id='L89' name='L89'></a>The signature will be marked as non-exportable.
<a id='L90' name='L90'></a>
<a id='L91' name='L91'></a>Really sign? (y/N) &lt;kbd class="kbd"&gt;y&lt;/kbd&gt;
<a id='L92' name='L92'></a>
<a id='L93' name='L93'></a>$ &lt;kbd class="kbd"&gt;gpg --verify yacasl2.tar.gz.asc&lt;/kbd&gt;
<a id='L94' name='L94'></a>gpg: assuming signed data in 'yacasl2.tar.gz'
<a id='L95' name='L95'></a>gpg: Signature made Tue 02 Jun 2026 01:14:17 AM JST
<a id='L96' name='L96'></a>gpg:                using EDDSA key 77EC282A2F7317EBFF7BFD067F593ED86D88E1D5
<a id='L97' name='L97'></a>gpg: checking the trustdb
<a id='L98' name='L98'></a>gpg: marginals needed: 3  completes needed: 1  trust model: pgp
<a id='L99' name='L99'></a>gpg: depth: 0  valid:   1  signed:   1  trust: 0-, 0q, 0n, 0m, 0f, 1u
<a id='L100' name='L100'></a>gpg: depth: 1  valid:   1  signed:   0  trust: 1-, 0q, 0n, 0m, 0f, 0u
<a id='L101' name='L101'></a>gpg: next trustdb check due at 2029-06-01
<a id='L102' name='L102'></a>gpg: Good signature from &amp;quot;j8takagi &amp;lt;j8takagi@nifty.com&amp;gt;&amp;quot; [full]
<a id='L103' name='L103'></a>gpg: Signature notation: manu=2,2.5+1.12,0,3
<a id='L104' name='L104'></a>&lt;/pre&gt;&lt;/div&gt;
<a id='L105' name='L105'></a>
<a id='L106' name='L106'></a>&lt;/div&gt;
<a id='L107' name='L107'></a>&lt;div class="subsection-level-extent" id="MD5_30cf_30c3_30b7_30e5_5024_3067_306e_691c_8a3c"&gt;
<a id='L108' name='L108'></a>&lt;h4 class="subsection"&gt;&lt;span&gt;2.2.2 MD5ハッシュ値での検証&lt;a class="copiable-link" href="#MD5_30cf_30c3_30b7_30e5_5024_3067_306e_691c_8a3c"&gt; &amp;para;&lt;/a&gt;&lt;/span&gt;&lt;/h4&gt;
<a id='L109' name='L109'></a>
<a id='L110' name='L110'></a>&lt;p&gt;&lt;code class="command"&gt;openssl&lt;/code&gt;で圧縮ファイルから生成したMD5ハッシュ値が、ダウンロードした&lt;samp class="file"&gt;yacasl2.tar.gz.md5sum&lt;/samp&gt;ファイルの内容と同じかどうか&lt;code class="command"&gt;diff&lt;/code&gt;で検証します。
<a id='L111' name='L111'></a>&lt;/p&gt;
<a id='L112' name='L112'></a>&lt;div class="example"&gt;
<a id='L113' name='L113'></a>&lt;pre class="example-preformatted"&gt;$ &lt;kbd class="kbd"&gt;openssl md5 yacasl2.tar.gz | diff -s yacasl2.tar.gz.md5sum -&lt;/kbd&gt;
<a id='L114' name='L114'></a>Files yacasl2.tar.gz.md5sum and - are identical
<a id='L115' name='L115'></a>&lt;/pre&gt;&lt;/div&gt;
<a id='L116' name='L116'></a>
<a id='L117' name='L117'></a>&lt;/div&gt;
<a id='L118' name='L118'></a>&lt;/div&gt;
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