238 lines
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238 lines
25 KiB
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<div id="projectbrief">Universal wireless communication library for Arduino</div>
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<div class="title">Cryptography.h</div> </div>
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#if !defined(_RADIOLIB_CRYPTOGRAPHY_H)</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define _RADIOLIB_CRYPTOGRAPHY_H</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>  </div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="preprocessor">#include "../TypeDef.h"</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include "../Module.h"</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>  </div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// AES-128 constants</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#define RADIOLIB_AES128_BLOCK_SIZE (16)</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#define RADIOLIB_AES128_KEY_SIZE (RADIOLIB_AES128_BLOCK_SIZE)</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#define RADIOLIB_AES128_N_K ((RADIOLIB_AES128_BLOCK_SIZE) / sizeof(uint32_t))</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#define RADIOLIB_AES128_N_B (4)</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#define RADIOLIB_AES128_N_R (10)</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#define RADIOLIB_AES128_KEY_EXP_SIZE (176)</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  </div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">// helper type</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">typedef</span> uint8_t state_t[4][4];</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  </div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// AES lookup tables</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">static</span> <span class="keyword">const</span> uint8_t aesSbox[] RADIOLIB_NONVOLATILE = {</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> };</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  </div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="keyword">static</span> <span class="keyword">const</span> uint8_t aesSboxInv[] RADIOLIB_NONVOLATILE = {</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> };</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  </div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="keyword">static</span> <span class="keyword">const</span> uint8_t aesRcon[] = { 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36 };</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  </div>
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<div class="line"><a name="l00097"></a><span class="lineno"><a class="line" href="class_radio_lib_a_e_s128.html"> 97</a></span> <span class="keyword">class </span><a class="code" href="class_radio_lib_a_e_s128.html">RadioLibAES128</a> {</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <a class="code" href="class_radio_lib_a_e_s128.html#a11f816221d1c06432ff80f2678ef46fe">RadioLibAES128</a>();</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  </div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordtype">void</span> <a class="code" href="class_radio_lib_a_e_s128.html#a2f688dbdf2b0506c077ca4501e40e22e">init</a>(uint8_t* key);</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  </div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordtype">size_t</span> <a class="code" href="class_radio_lib_a_e_s128.html#a4c7b49c3ed16f3849d8050a24a11c3c1">encryptECB</a>(uint8_t* in, <span class="keywordtype">size_t</span> len, uint8_t* out);</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  </div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordtype">size_t</span> <a class="code" href="class_radio_lib_a_e_s128.html#abe0e368c6a94b2caf1559add1c262a98">decryptECB</a>(uint8_t* in, <span class="keywordtype">size_t</span> len, uint8_t* out);</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  </div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordtype">void</span> <a class="code" href="class_radio_lib_a_e_s128.html#a260a1ac84386141781b3d7c213ff161c">generateCMAC</a>(uint8_t* in, <span class="keywordtype">size_t</span> len, uint8_t* cmac);</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  </div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordtype">bool</span> <a class="code" href="class_radio_lib_a_e_s128.html#a382e9dfdc10b7dd58e2bd0aa15f5e1dd">verifyCMAC</a>(uint8_t* in, <span class="keywordtype">size_t</span> len, uint8_t* cmac);</div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  </div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  uint8_t* keyPtr;</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  uint8_t roundKey[RADIOLIB_AES128_KEY_EXP_SIZE];</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  </div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordtype">void</span> keyExpansion(uint8_t* roundKey, uint8_t* key);</div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordtype">void</span> cipher(state_t* state, uint8_t* roundKey);</div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keywordtype">void</span> decipher(state_t* state, uint8_t* roundKey);</div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  </div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordtype">void</span> subWord(uint8_t* word);</div>
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keywordtype">void</span> rotWord(uint8_t* word);</div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  </div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordtype">void</span> addRoundKey(uint8_t round, state_t* state, uint8_t* roundKey);</div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  </div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordtype">void</span> blockXor(uint8_t* dst, uint8_t* a, uint8_t* b);</div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordtype">void</span> blockLeftshift(uint8_t* dst, uint8_t* src);</div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordtype">void</span> generateSubkeys(uint8_t* key1, uint8_t* key2);</div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  </div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordtype">void</span> subBytes(state_t* state, <span class="keyword">const</span> uint8_t* box);</div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keywordtype">void</span> shiftRows(state_t* state, <span class="keywordtype">bool</span> inv);</div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordtype">void</span> mixColumns(state_t* state, <span class="keywordtype">bool</span> inv);</div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  </div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  uint8_t mul(uint8_t a, uint8_t b);</div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> };</div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  </div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment">// the global singleton</span></div>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="keyword">extern</span> <a class="code" href="class_radio_lib_a_e_s128.html">RadioLibAES128</a> RadioLibAES128Instance;</div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  </div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="preprocessor">#endif</span></div>
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<div class="ttc" id="aclass_radio_lib_a_e_s128_html"><div class="ttname"><a href="class_radio_lib_a_e_s128.html">RadioLibAES128</a></div><div class="ttdoc">Class to perform AES encryption, decryption and CMAC.</div><div class="ttdef"><b>Definition:</b> Cryptography.h:97</div></div>
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<div class="ttc" id="aclass_radio_lib_a_e_s128_html_a11f816221d1c06432ff80f2678ef46fe"><div class="ttname"><a href="class_radio_lib_a_e_s128.html#a11f816221d1c06432ff80f2678ef46fe">RadioLibAES128::RadioLibAES128</a></div><div class="ttdeci">RadioLibAES128()</div><div class="ttdoc">Default constructor.</div><div class="ttdef"><b>Definition:</b> Cryptography.cpp:5</div></div>
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<div class="ttc" id="aclass_radio_lib_a_e_s128_html_a260a1ac84386141781b3d7c213ff161c"><div class="ttname"><a href="class_radio_lib_a_e_s128.html#a260a1ac84386141781b3d7c213ff161c">RadioLibAES128::generateCMAC</a></div><div class="ttdeci">void generateCMAC(uint8_t *in, size_t len, uint8_t *cmac)</div><div class="ttdoc">Calculate message authentication code according to RFC4493.</div><div class="ttdef"><b>Definition:</b> Cryptography.cpp:46</div></div>
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<div class="ttc" id="aclass_radio_lib_a_e_s128_html_a2f688dbdf2b0506c077ca4501e40e22e"><div class="ttname"><a href="class_radio_lib_a_e_s128.html#a2f688dbdf2b0506c077ca4501e40e22e">RadioLibAES128::init</a></div><div class="ttdeci">void init(uint8_t *key)</div><div class="ttdoc">Initialize the AES.</div><div class="ttdef"><b>Definition:</b> Cryptography.cpp:9</div></div>
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<div class="ttc" id="aclass_radio_lib_a_e_s128_html_a382e9dfdc10b7dd58e2bd0aa15f5e1dd"><div class="ttname"><a href="class_radio_lib_a_e_s128.html#a382e9dfdc10b7dd58e2bd0aa15f5e1dd">RadioLibAES128::verifyCMAC</a></div><div class="ttdeci">bool verifyCMAC(uint8_t *in, size_t len, uint8_t *cmac)</div><div class="ttdoc">Verify the received CMAC. This just calculates the CMAC again and compares the results.</div><div class="ttdef"><b>Definition:</b> Cryptography.cpp:85</div></div>
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<div class="ttc" id="aclass_radio_lib_a_e_s128_html_a4c7b49c3ed16f3849d8050a24a11c3c1"><div class="ttname"><a href="class_radio_lib_a_e_s128.html#a4c7b49c3ed16f3849d8050a24a11c3c1">RadioLibAES128::encryptECB</a></div><div class="ttdeci">size_t encryptECB(uint8_t *in, size_t len, uint8_t *out)</div><div class="ttdoc">Perform ECB-type AES encryption.</div><div class="ttdef"><b>Definition:</b> Cryptography.cpp:14</div></div>
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<div class="ttc" id="aclass_radio_lib_a_e_s128_html_abe0e368c6a94b2caf1559add1c262a98"><div class="ttname"><a href="class_radio_lib_a_e_s128.html#abe0e368c6a94b2caf1559add1c262a98">RadioLibAES128::decryptECB</a></div><div class="ttdeci">size_t decryptECB(uint8_t *in, size_t len, uint8_t *out)</div><div class="ttdoc">Perform ECB-type AES decryption.</div><div class="ttdef"><b>Definition:</b> Cryptography.cpp:30</div></div>
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