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<div id="projectbrief">Universal wireless communication library for Arduino</div>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="preprocessor">#if !defined(_RADIOLIB_CRYPTOGRAPHY_H)</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="preprocessor">#define _RADIOLIB_CRYPTOGRAPHY_H</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span> </div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="preprocessor">#include &quot;../TypeDef.h&quot;</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="preprocessor">#include &quot;../Module.h&quot;</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span> </div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment">// AES-128 constants</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#define RADIOLIB_AES128_BLOCK_SIZE (16)</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#define RADIOLIB_AES128_KEY_SIZE (RADIOLIB_AES128_BLOCK_SIZE)</span></div>
<div class="line"><a id="l00010" 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>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#define RADIOLIB_AES128_N_B (4)</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#define RADIOLIB_AES128_N_R (10)</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#define RADIOLIB_AES128_KEY_EXP_SIZE (176)</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="comment">// helper type</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="keyword">typedef</span> uint8_t state_t[4][4];</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="comment">// AES lookup tables</span></div>
<div class="line"><a id="l00019" 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 id="l00052" name="l00052"></a><span class="lineno"> 52</span>};</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> </div>
<div class="line"><a id="l00054" 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 id="l00087" name="l00087"></a><span class="lineno"> 87</span>};</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> </div>
<div class="line"><a id="l00089" 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>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> </div>
<div class="foldopen" id="foldopen00097" data-start="{" data-end="};">
<div class="line"><a id="l00097" 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 hl_class" href="class_radio_lib_a_e_s128.html">RadioLibAES128</a> {</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> <span class="keyword">public</span>:</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <a class="code hl_function" href="class_radio_lib_a_e_s128.html#a11f816221d1c06432ff80f2678ef46fe">RadioLibAES128</a>();</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> </div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> <span class="keywordtype">void</span> <a class="code hl_function" href="class_radio_lib_a_e_s128.html#a2f688dbdf2b0506c077ca4501e40e22e">init</a>(uint8_t* key);</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> </div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <span class="keywordtype">size_t</span> <a class="code hl_function" href="class_radio_lib_a_e_s128.html#a6d05efec834b1ae7c5e46f9ef80f1464">encryptECB</a>(<span class="keyword">const</span> uint8_t* in, <span class="keywordtype">size_t</span> len, uint8_t* out);</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> </div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> <span class="keywordtype">size_t</span> <a class="code hl_function" href="class_radio_lib_a_e_s128.html#ace646a86f293a791008212ac8bcbc01c">decryptECB</a>(<span class="keyword">const</span> uint8_t* in, <span class="keywordtype">size_t</span> len, uint8_t* out);</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> </div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> <span class="keywordtype">void</span> <a class="code hl_function" href="class_radio_lib_a_e_s128.html#a1330c5668c22e5f0b65681cf875f5fe3">generateCMAC</a>(<span class="keyword">const</span> uint8_t* in, <span class="keywordtype">size_t</span> len, uint8_t* cmac);</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> </div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="class_radio_lib_a_e_s128.html#a793795f82f27abd34409a5c0e0e7c455">verifyCMAC</a>(<span class="keyword">const</span> uint8_t* in, <span class="keywordtype">size_t</span> len, <span class="keyword">const</span> uint8_t* cmac);</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> </div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> <span class="keyword">private</span>:</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> uint8_t* keyPtr = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> uint8_t roundKey[RADIOLIB_AES128_KEY_EXP_SIZE] = { 0 };</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> </div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> <span class="keywordtype">void</span> keyExpansion(uint8_t* roundKey, <span class="keyword">const</span> uint8_t* key);</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> <span class="keywordtype">void</span> cipher(state_t* state, uint8_t* roundKey);</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> <span class="keywordtype">void</span> decipher(state_t* state, uint8_t* roundKey);</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> </div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> <span class="keywordtype">void</span> subWord(uint8_t* word);</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> <span class="keywordtype">void</span> rotWord(uint8_t* word);</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> </div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> <span class="keywordtype">void</span> blockXor(uint8_t* dst, <span class="keyword">const</span> uint8_t* a, <span class="keyword">const</span> uint8_t* b);</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> <span class="keywordtype">void</span> blockLeftshift(uint8_t* dst, <span class="keyword">const</span> uint8_t* src);</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> <span class="keywordtype">void</span> generateSubkeys(uint8_t* key1, uint8_t* key2);</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> </div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> <span class="keywordtype">void</span> subBytes(state_t* state, <span class="keyword">const</span> uint8_t* box);</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> <span class="keywordtype">void</span> shiftRows(state_t* state, <span class="keywordtype">bool</span> inv);</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> <span class="keywordtype">void</span> mixColumns(state_t* state, <span class="keywordtype">bool</span> inv);</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> </div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> <span class="comment">// cppcheck seems convinced these are nut used, which is not true</span></div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> uint8_t mul(uint8_t a, uint8_t b); <span class="comment">// cppcheck-suppress unusedPrivateFunction</span></div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> <span class="keywordtype">void</span> addRoundKey(uint8_t round, state_t* state, <span class="keyword">const</span> uint8_t* roundKey); <span class="comment">// cppcheck-suppress unusedPrivateFunction</span></div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span>};</div>
</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> </div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span><span class="comment">// the global singleton</span></div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span><span class="keyword">extern</span> <a class="code hl_class" href="class_radio_lib_a_e_s128.html">RadioLibAES128</a> RadioLibAES128Instance;</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> </div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span><span class="preprocessor">#endif</span></div>
<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>
<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>
<div class="ttc" id="aclass_radio_lib_a_e_s128_html_a1330c5668c22e5f0b65681cf875f5fe3"><div class="ttname"><a href="class_radio_lib_a_e_s128.html#a1330c5668c22e5f0b65681cf875f5fe3">RadioLibAES128::generateCMAC</a></div><div class="ttdeci">void generateCMAC(const 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>
<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>
<div class="ttc" id="aclass_radio_lib_a_e_s128_html_a6d05efec834b1ae7c5e46f9ef80f1464"><div class="ttname"><a href="class_radio_lib_a_e_s128.html#a6d05efec834b1ae7c5e46f9ef80f1464">RadioLibAES128::encryptECB</a></div><div class="ttdeci">size_t encryptECB(const 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>
<div class="ttc" id="aclass_radio_lib_a_e_s128_html_a793795f82f27abd34409a5c0e0e7c455"><div class="ttname"><a href="class_radio_lib_a_e_s128.html#a793795f82f27abd34409a5c0e0e7c455">RadioLibAES128::verifyCMAC</a></div><div class="ttdeci">bool verifyCMAC(const uint8_t *in, size_t len, const 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>
<div class="ttc" id="aclass_radio_lib_a_e_s128_html_ace646a86f293a791008212ac8bcbc01c"><div class="ttname"><a href="class_radio_lib_a_e_s128.html#ace646a86f293a791008212ac8bcbc01c">RadioLibAES128::decryptECB</a></div><div class="ttdeci">size_t decryptECB(const 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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