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id="id-d5856e6230-link">设计说明</a></div></div></li></ul></li></ul></li></ul></li></ul></div>
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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" 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/enc_config_guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">参数配置</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div><div class="- topic/body body"><section class="- topic/section section" id="id__id2" data-ofbid="id__id2"><h2 class="- topic/title title sectiontitle">驱动配置</h2>
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<div class="- topic/p p" data-ofbid="d235739e24__20250121171655">在 <span class="- topic/ph ph">Luban-Lite</span> 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
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的加密使能，作为示例）：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_lzr_tg4_fdc" data-ofbid="id__codeblock_lzr_tg4_fdc">Board options --->
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[*] Using spienc --->
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[*] Enc qspi0</pre></div>
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<div class="- topic/p p" data-ofbid="d235739e35__20250121171655">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。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_ql1_5g4_fdc" data-ofbid="id__codeblock_ql1_5g4_fdc">Board options --->
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[*] Using spienc --->
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(<span class="hl-number">0</span>) set qspi0 tweak</pre></div>
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</section><section class="- topic/section section" id="id__id3" data-ofbid="id__id3"><h2 class="- topic/title title sectiontitle">密钥配置</h2>
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<p class="- topic/p p" data-ofbid="d235739e45__20250121171655">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 simple" id="id__ul_p1q_pc3_bdc" data-ofbid="id__ul_p1q_pc3_bdc"><li class="- topic/li li" data-ofbid="d235739e49__20250121171655">
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<p class="- topic/p p" data-ofbid="d235739e51__20250121171655">128 bit AES 密钥(KEY)</p>
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</li><li class="- topic/li li" data-ofbid="d235739e54__20250121171655">
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<p class="- topic/p p" data-ofbid="d235739e56__20250121171655">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="d235739e60__20250121171655">其中 KEY 直接使用 eFuse 中的 <span class="+ topic/keyword pr-d/parmname keyword parmname">SPI_ENC_KEY</span> ，COUNTER 值则由几部分共同产生</p>
|
||
<ul class="- topic/ul ul simple" id="id__ul_r1q_pc3_bdc" data-ofbid="id__ul_r1q_pc3_bdc"><li class="- topic/li li" data-ofbid="d235739e67__20250121171655">
|
||
<p class="- topic/p p" data-ofbid="d235739e69__20250121171655">eFuse 中的 <span class="+ topic/keyword pr-d/parmname keyword parmname">SPI_ENC_NONCE</span></p>
|
||
</li><li class="- topic/li li" data-ofbid="d235739e74__20250121171655">
|
||
<p class="- topic/p p" data-ofbid="d235739e76__20250121171655">menuconfig 的功能配置界面中配置的 <span class="+ topic/keyword pr-d/parmname keyword parmname">tweak</span></p>
|
||
</li><li class="- topic/li li" data-ofbid="d235739e81__20250121171655">
|
||
<p class="- topic/p p" data-ofbid="d235739e83__20250121171655">访问数据所在的地址 <span class="+ topic/keyword pr-d/parmname keyword parmname">address</span></p>
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||
</li></ul>
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<figure class="- topic/fig fig fignone" id="id__id4" data-ofbid="id__id4"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_s1q_pc3_bdc" src="../../../images/memory/spienc_counter_value.png" alt="spienc_counter_value"/></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>
|
||
<p class="- topic/p p" data-ofbid="d235739e97__20250121171655">因此在使能 SPI_ENC 时，需要设置以下的 eFuse 信息：</p>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="id__table_t1q_pc3_bdc" data-ofbid="id__table_t1q_pc3_bdc" data-cols="3"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title"></span></caption><colgroup><col style="width:27.819548872180448%"/><col style="width:25.062656641604008%"/><col style="width:47.11779448621554%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_t1q_pc3_bdc__entry__1">eFuse 区域</th><th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_t1q_pc3_bdc__entry__2">大小(BIT)</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_t1q_pc3_bdc__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="id__table_t1q_pc3_bdc__entry__1">SPI_ENC_KEY</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_t1q_pc3_bdc__entry__2">128</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_t1q_pc3_bdc__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="id__table_t1q_pc3_bdc__entry__1">SPI_ENC_NONCE</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_t1q_pc3_bdc__entry__2">64</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_t1q_pc3_bdc__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="id__table_t1q_pc3_bdc__entry__1">SPI_ENC_ENABLE BIT</td><td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_t1q_pc3_bdc__entry__2">1</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_t1q_pc3_bdc__entry__3">使能 BROM 的 SPI_ENC 功能，才可正确启动</td></tr></tbody></table></div>
|
||
<p class="- topic/p p" data-ofbid="d235739e137__20250121171655">具体 eFuse 区域的地址，请参考芯片的数据手册。</p>
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