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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/spienc/spi-enc-configuration.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">SPI ENC 配置</h1><div class="date inPage">16 Dec 2024</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><section class="- topic/section section" id="spi_enc_configuration__section_hsh_hxq_g1c" data-ofbid="spi_enc_configuration__section_hsh_hxq_g1c"><h2 class="- topic/title title sectiontitle">驱动配置</h2>
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<p class="- topic/p p" data-ofbid="d195336e27__20250121171632">在 Luban-Lite 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">scons --menuconfig</span>，进入 menuconfig
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的功能配置界面，按如下选择（配置只打开了 QSPI0 的加密使能，作为示例）：</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_enc_configuration__pre_ish_hxq_g1c" data-ofbid="spi_enc_configuration__pre_ish_hxq_g1c">Board options --->
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[*] Using spienc --->
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[*] Enc qspi0
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</pre>
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<p class="- topic/p p" data-ofbid="d195336e36__20250121171632">SPIENC 中的 Tweak 可以影响 COUNTER 的生成，进而改变加密的结果。 如果需要让在不同的产品对相同的数据有不同的加密结果，则可以进入
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menuconfig 的功能配置界面调整该值。</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_enc_configuration__pre_jsh_hxq_g1c" data-ofbid="spi_enc_configuration__pre_jsh_hxq_g1c">Board options --->
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[*] Using spienc --->
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(<span class="hl-number">0</span>) set qspi0 tweak</pre>
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</section><section class="- topic/section section" id="spi_enc_configuration__section_syv_drx_21c" data-ofbid="spi_enc_configuration__section_syv_drx_21c"><h2 class="- topic/title title sectiontitle">密钥配置</h2>
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<p class="- topic/p p" data-ofbid="d195336e47__20250121171632">SPI_ENC 模块使用 AES-128-CTR 算法对 SPI 总线数据进行加解密，该算法在计算时的密钥有两部分</p>
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<ul class="- topic/ul ul" id="spi_enc_configuration__ul_uyv_drx_21c" data-ofbid="spi_enc_configuration__ul_uyv_drx_21c"><li class="- topic/li li" data-ofbid="d195336e51__20250121171632">
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<p class="- topic/p p" data-ofbid="d195336e53__20250121171632">128 bit AES 密钥(KEY)</p>
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</li><li class="- topic/li li" data-ofbid="d195336e56__20250121171632">
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<p class="- topic/p p" data-ofbid="d195336e58__20250121171632">128 bit 数据块的 COUNTER 值</p>
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</li></ul>
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<p class="- topic/p p" data-ofbid="d195336e62__20250121171632">其中 KEY 直接使用 eFuse 中的 <code class="+ topic/ph pr-d/codeph ph codeph">SPI_ENC_KEY</code> ，COUNTER 值则由几部分共同产生</p>
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<ul class="- topic/ul ul" id="spi_enc_configuration__ul_wyv_drx_21c" data-ofbid="spi_enc_configuration__ul_wyv_drx_21c"><li class="- topic/li li" data-ofbid="d195336e69__20250121171632">
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<p class="- topic/p p" data-ofbid="d195336e71__20250121171632">eFuse 中的 <code class="+ topic/ph pr-d/codeph ph codeph">SPI_ENC_NONCE</code></p>
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</li><li class="- topic/li li" data-ofbid="d195336e76__20250121171632">
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<p class="- topic/p p" data-ofbid="d195336e78__20250121171632">menuconfig 的功能配置界面中配置的 <code class="+ topic/ph pr-d/codeph ph codeph">tweak</code></p>
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</li><li class="- topic/li li" data-ofbid="d195336e83__20250121171632">
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<p class="- topic/p p" data-ofbid="d195336e85__20250121171632">访问数据所在的地址 <code class="+ topic/ph pr-d/codeph ph codeph">address</code></p>
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<figure class="- topic/fig fig fignone" id="spi_enc_configuration__fig_k5p_frx_21c" data-ofbid="spi_enc_configuration__fig_k5p_frx_21c"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="spi_enc_configuration__image_xyv_drx_21c" src="../../../images/spienc/spienc_counter_value1.png" alt="spienc_counter_value1"/></div><br/><figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 1</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">COUNTER 值的生成</span></figcaption></figure>
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</li></ul>
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<p class="- topic/p p" data-ofbid="d195336e99__20250121171632">因此在使能 SPI_ENC 时，需要设置以下的 eFuse 信息：</p>
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<div class="table-container"><table class="- topic/table table frame-all" id="spi_enc_configuration__table_yyv_drx_21c" data-ofbid="spi_enc_configuration__table_yyv_drx_21c" data-cols="3"><caption></caption><colgroup><col style="width:33.33333333333333%"/><col style="width:15.873015873015872%"/><col style="width:50.79365079365079%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="spi_enc_configuration__table_yyv_drx_21c__entry__1">eFuse 区域</th><th class="- topic/entry entry colsep-1 rowsep-1" id="spi_enc_configuration__table_yyv_drx_21c__entry__2">大小(BIT)</th><th class="- topic/entry entry colsep-0 rowsep-1" id="spi_enc_configuration__table_yyv_drx_21c__entry__3">说明</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="spi_enc_configuration__table_yyv_drx_21c__entry__1">SPI_ENC_KEY</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="spi_enc_configuration__table_yyv_drx_21c__entry__2">128</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="spi_enc_configuration__table_yyv_drx_21c__entry__3">AES 密钥，烧录后应设置不可读写</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="spi_enc_configuration__table_yyv_drx_21c__entry__1">SPI_ENC_NONCE</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="spi_enc_configuration__table_yyv_drx_21c__entry__2">64</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="spi_enc_configuration__table_yyv_drx_21c__entry__3">用于生成 COUTNER 的随机数，烧录后应设置不可读写</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="spi_enc_configuration__table_yyv_drx_21c__entry__1">SPI_ENC_ENABLE BIT</td><td class="- topic/entry entry colsep-1 rowsep-0" headers="spi_enc_configuration__table_yyv_drx_21c__entry__2">1</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="spi_enc_configuration__table_yyv_drx_21c__entry__3">使能 BROM 的 SPI_ENC 功能，才可正确启动</td></tr></tbody></table></div>
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<p class="- topic/p p" data-ofbid="d195336e138__20250121171632">具体 eFuse 区域的地址，请参考芯片的数据手册。</p>
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#spi_enc_configuration__section_hsh_hxq_g1c" data-tocid="spi_enc_configuration__section_hsh_hxq_g1c">驱动配置</a></div></li><li class="section-item"><div class="section-title"><a href="#spi_enc_configuration__section_syv_drx_21c" data-tocid="spi_enc_configuration__section_syv_drx_21c">密钥配置</a></div></li></ul></div>
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