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<a href="ecmult__impl_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/**********************************************************************</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2013, 2014 Pieter Wuille *</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Distributed under the MIT software license, see the accompanying *</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * file COPYING or http://www.opensource.org/licenses/mit-license.php.*</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> **********************************************************************/</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> </div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#ifndef _SECP256K1_ECMULT_IMPL_H_</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#define _SECP256K1_ECMULT_IMPL_H_</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "<a class="code" href="group_8h.html">group.h</a>"</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "<a class="code" href="scalar_8h.html">scalar.h</a>"</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "<a class="code" href="ecmult_8h.html">ecmult.h</a>"</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> </div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">/* optimal for 128-bit and 256-bit exponents. */</span></div><div class="line"><a name="l00015"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718"> 15</a></span> <span class="preprocessor">#define WINDOW_A 5</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#ifdef USE_ENDOMORPHISM</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#define WINDOW_G 15</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div><div class="line"><a name="l00024"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#afe951ac62b5b06848cb4e6f4dbc69616"> 24</a></span> <span class="preprocessor">#define WINDOW_G 16</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div><div class="line"><a name="l00028"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1"> 28</a></span> <span class="preprocessor">#define ECMULT_TABLE_SIZE(w) (1 << ((w)-2))</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00035"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#a5008191228d03c7325ea86aa8baaf4dc"> 35</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="ecmult__impl_8h.html#a5008191228d03c7325ea86aa8baaf4dc">secp256k1_ecmult_odd_multiples_table</a>(<span class="keywordtype">int</span> <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>, <a class="code" href="structsecp256k1__gej.html">secp256k1_gej</a> *prej, <a class="code" href="structsecp256k1__fe.html">secp256k1_fe</a> *zr, <span class="keyword">const</span> <a class="code" href="structsecp256k1__gej.html">secp256k1_gej</a> *a) {</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <a class="code" href="structsecp256k1__gej.html">secp256k1_gej</a> d;</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <a class="code" href="structsecp256k1__ge.html">secp256k1_ge</a> a_ge, d_ge;</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordtype">int</span> i;</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <a class="code" href="secp256k1_2src_2util_8h.html#aca8ac5ae73fd966db106de59160a178b">VERIFY_CHECK</a>(!a-><a class="code" href="structsecp256k1__gej.html#ab3ec8168caf27aa3a092d512eaadaad9">infinity</a>);</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <a class="code" href="group_8h.html#a033aa434a4d0838f649ad757dd44db46">secp256k1_gej_double_var</a>(&d, a, NULL);</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="comment">/*</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> * Perform the additions on an isomorphism where 'd' is affine: drop the z coordinate</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * of 'd', and scale the 1P starting value's x/y coordinates without changing its z.</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> */</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  d_ge.<a class="code" href="structsecp256k1__ge.html#a3c04a97b606c82ea87e55d4a06f06b6e">x</a> = d.<a class="code" href="structsecp256k1__gej.html#a7d2451c89411d62628ac466eb28c8ff5">x</a>;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  d_ge.<a class="code" href="structsecp256k1__ge.html#a604295983a1f4aa6e8b5b0f1e46f9ee0">y</a> = d.<a class="code" href="structsecp256k1__gej.html#a29d5184060ad790d85a0c89a13820e0d">y</a>;</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  d_ge.<a class="code" href="structsecp256k1__ge.html#a1cdb35fe7abf6f17c08e4375eeb26628">infinity</a> = 0;</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <a class="code" href="group__impl_8h.html#a6492f6aad16e545239c0ec52780d2e1f">secp256k1_ge_set_gej_zinv</a>(&a_ge, a, &d.<a class="code" href="structsecp256k1__gej.html#ae41776408dba32cbe28b5e345b5f2286">z</a>);</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  prej[0].<a class="code" href="structsecp256k1__gej.html#a7d2451c89411d62628ac466eb28c8ff5">x</a> = a_ge.<a class="code" href="structsecp256k1__ge.html#a3c04a97b606c82ea87e55d4a06f06b6e">x</a>;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  prej[0].<a class="code" href="structsecp256k1__gej.html#a29d5184060ad790d85a0c89a13820e0d">y</a> = a_ge.<a class="code" href="structsecp256k1__ge.html#a604295983a1f4aa6e8b5b0f1e46f9ee0">y</a>;</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  prej[0].<a class="code" href="structsecp256k1__gej.html#ae41776408dba32cbe28b5e345b5f2286">z</a> = a-><a class="code" href="structsecp256k1__gej.html#ae41776408dba32cbe28b5e345b5f2286">z</a>;</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  prej[0].<a class="code" href="structsecp256k1__gej.html#ab3ec8168caf27aa3a092d512eaadaad9">infinity</a> = 0;</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  zr[0] = d.<a class="code" href="structsecp256k1__gej.html#ae41776408dba32cbe28b5e345b5f2286">z</a>;</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">for</span> (i = 1; i < <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>; i++) {</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <a class="code" href="group_8h.html#a4d0338f50b08d082caa32f8e72707b55">secp256k1_gej_add_ge_var</a>(&prej[i], &prej[i-1], &d_ge, &zr[i]);</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  }</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">/*</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> * Each point in 'prej' has a z coordinate too small by a factor of 'd.z'. Only</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> * the final point's z coordinate is actually used though, so just update that.</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> */</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <a class="code" href="field_8h.html#a542b97d2574d9687c563d002587cf9a2">secp256k1_fe_mul</a>(&prej[<a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>-1].z, &prej[<a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>-1].z, &d.<a class="code" href="structsecp256k1__gej.html#ae41776408dba32cbe28b5e345b5f2286">z</a>);</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> }</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div><div class="line"><a name="l00085"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#a33fe27d5aa383017999f80a1cdd8d8ca"> 85</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="ecmult__impl_8h.html#a33fe27d5aa383017999f80a1cdd8d8ca">secp256k1_ecmult_odd_multiples_table_globalz_windowa</a>(<a class="code" href="structsecp256k1__ge.html">secp256k1_ge</a> *pre, <a class="code" href="structsecp256k1__fe.html">secp256k1_fe</a> *globalz, <span class="keyword">const</span> <a class="code" href="structsecp256k1__gej.html">secp256k1_gej</a> *a) {</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <a class="code" href="structsecp256k1__gej.html">secp256k1_gej</a> prej[<a class="code" href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1">ECMULT_TABLE_SIZE</a>(<a class="code" href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718">WINDOW_A</a>)];</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <a class="code" href="structsecp256k1__fe.html">secp256k1_fe</a> zr[<a class="code" href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1">ECMULT_TABLE_SIZE</a>(<a class="code" href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718">WINDOW_A</a>)];</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> </div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="comment">/* Compute the odd multiples in Jacobian form. */</span></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <a class="code" href="ecmult__impl_8h.html#a5008191228d03c7325ea86aa8baaf4dc">secp256k1_ecmult_odd_multiples_table</a>(<a class="code" href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1">ECMULT_TABLE_SIZE</a>(<a class="code" href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718">WINDOW_A</a>), prej, zr, a);</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">/* Bring them to the same Z denominator. */</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <a class="code" href="group_8h.html#a5391d63ab98be9202d5f14611133fe35">secp256k1_ge_globalz_set_table_gej</a>(<a class="code" href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1">ECMULT_TABLE_SIZE</a>(<a class="code" href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718">WINDOW_A</a>), pre, globalz, prej, zr);</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> }</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#a72a05df0626a92692be8ca5e68c19a56"> 95</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="ecmult__impl_8h.html#a72a05df0626a92692be8ca5e68c19a56">secp256k1_ecmult_odd_multiples_table_storage_var</a>(<span class="keywordtype">int</span> <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>, <a class="code" href="structsecp256k1__ge__storage.html">secp256k1_ge_storage</a> *pre, <span class="keyword">const</span> <a class="code" href="structsecp256k1__gej.html">secp256k1_gej</a> *a, <span class="keyword">const</span> <a class="code" href="structsecp256k1__callback.html">secp256k1_callback</a> *cb) {</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <a class="code" href="structsecp256k1__gej.html">secp256k1_gej</a> *prej = (<a class="code" href="structsecp256k1__gej.html">secp256k1_gej</a>*)<a class="code" href="secp256k1_2src_2util_8h.html#a20790114658c559e5048a38694708c3e">checked_malloc</a>(cb, <span class="keyword">sizeof</span>(<a class="code" href="structsecp256k1__gej.html">secp256k1_gej</a>) * <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>);</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <a class="code" href="structsecp256k1__ge.html">secp256k1_ge</a> *prea = (<a class="code" href="structsecp256k1__ge.html">secp256k1_ge</a>*)<a class="code" href="secp256k1_2src_2util_8h.html#a20790114658c559e5048a38694708c3e">checked_malloc</a>(cb, <span class="keyword">sizeof</span>(<a class="code" href="structsecp256k1__ge.html">secp256k1_ge</a>) * <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>);</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <a class="code" href="structsecp256k1__fe.html">secp256k1_fe</a> *zr = (<a class="code" href="structsecp256k1__fe.html">secp256k1_fe</a>*)<a class="code" href="secp256k1_2src_2util_8h.html#a20790114658c559e5048a38694708c3e">checked_malloc</a>(cb, <span class="keyword">sizeof</span>(<a class="code" href="structsecp256k1__fe.html">secp256k1_fe</a>) * <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>);</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordtype">int</span> i;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="comment">/* Compute the odd multiples in Jacobian form. */</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <a class="code" href="ecmult__impl_8h.html#a5008191228d03c7325ea86aa8baaf4dc">secp256k1_ecmult_odd_multiples_table</a>(<a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>, prej, zr, a);</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="comment">/* Convert them in batch to affine coordinates. */</span></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <a class="code" href="group_8h.html#a1cf9611464711ed63bde94d92ecc70de">secp256k1_ge_set_table_gej_var</a>(<a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>, prea, prej, zr);</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="comment">/* Convert them to compact storage form. */</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">for</span> (i = 0; i < <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>; i++) {</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <a class="code" href="group_8h.html#ad6499ae629f998e50d8614869ee3c67f">secp256k1_ge_to_storage</a>(&pre[i], &prea[i]);</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  }</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  free(prea);</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  free(prej);</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  free(zr);</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> }</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div><div class="line"><a name="l00117"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#afe9218069a15709b99aacd7af0ba2636"> 117</a></span> <span class="preprocessor">#define ECMULT_TABLE_GET_GE(r,pre,n,w) do { \</span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="preprocessor"> VERIFY_CHECK(((n) & 1) == 1); \</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="preprocessor"> VERIFY_CHECK((n) >= -((1 << ((w)-1)) - 1)); \</span></div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="preprocessor"> VERIFY_CHECK((n) <= ((1 << ((w)-1)) - 1)); \</span></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="preprocessor"> if ((n) > 0) { \</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="preprocessor"> *(r) = (pre)[((n)-1)/2]; \</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="preprocessor"> } else { \</span></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="preprocessor"> secp256k1_ge_neg((r), &(pre)[(-(n)-1)/2]); \</span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="preprocessor"> } \</span></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="preprocessor">} while(0)</span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div><div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#a45d4a36e1a06a0214837d20789239f8b"> 128</a></span> <span class="preprocessor">#define ECMULT_TABLE_GET_GE_STORAGE(r,pre,n,w) do { \</span></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="preprocessor"> VERIFY_CHECK(((n) & 1) == 1); \</span></div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="preprocessor"> VERIFY_CHECK((n) >= -((1 << ((w)-1)) - 1)); \</span></div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="preprocessor"> VERIFY_CHECK((n) <= ((1 << ((w)-1)) - 1)); \</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="preprocessor"> if ((n) > 0) { \</span></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="preprocessor"> secp256k1_ge_from_storage((r), &(pre)[((n)-1)/2]); \</span></div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="preprocessor"> } else { \</span></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="preprocessor"> secp256k1_ge_from_storage((r), &(pre)[(-(n)-1)/2]); \</span></div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="preprocessor"> secp256k1_ge_neg((r), (r)); \</span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="preprocessor"> } \</span></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="preprocessor">} while(0)</span></div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div><div class="line"><a name="l00140"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#a3d2b8a81ffed27e7eca0058eb65831b5"> 140</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="ecmult__impl_8h.html#a3d2b8a81ffed27e7eca0058eb65831b5">secp256k1_ecmult_context_init</a>(<a class="code" href="structsecp256k1__ecmult__context.html">secp256k1_ecmult_context</a> *<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>) {</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g = NULL;</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="preprocessor">#ifdef USE_ENDOMORPHISM</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g_128 = NULL;</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> }</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div><div class="line"><a name="l00147"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#acc2494f319c79f6cc15982f43e7a6f00"> 147</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="ecmult__impl_8h.html#acc2494f319c79f6cc15982f43e7a6f00">secp256k1_ecmult_context_build</a>(<a class="code" href="structsecp256k1__ecmult__context.html">secp256k1_ecmult_context</a> *<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>, <span class="keyword">const</span> <a class="code" href="structsecp256k1__callback.html">secp256k1_callback</a> *cb) {</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <a class="code" href="structsecp256k1__gej.html">secp256k1_gej</a> gj;</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> </div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">if</span> (<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g != NULL) {</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  }</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="comment">/* get the generator */</span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <a class="code" href="group_8h.html#ad5f813e26afb239f03e83f0e61e05498">secp256k1_gej_set_ge</a>(&gj, &<a class="code" href="group__impl_8h.html#ac2075a99877abe469ea60a119fe68e6c">secp256k1_ge_const_g</a>);</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> </div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g = (<a class="code" href="structsecp256k1__ge__storage.html">secp256k1_ge_storage</a> (*)[])<a class="code" href="secp256k1_2src_2util_8h.html#a20790114658c559e5048a38694708c3e">checked_malloc</a>(cb, <span class="keyword">sizeof</span>((*<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g)[0]) * <a class="code" href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1">ECMULT_TABLE_SIZE</a>(<a class="code" href="ecmult__impl_8h.html#afe951ac62b5b06848cb4e6f4dbc69616">WINDOW_G</a>));</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> </div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="comment">/* precompute the tables with odd multiples */</span></div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <a class="code" href="ecmult__impl_8h.html#a72a05df0626a92692be8ca5e68c19a56">secp256k1_ecmult_odd_multiples_table_storage_var</a>(<a class="code" href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1">ECMULT_TABLE_SIZE</a>(<a class="code" href="ecmult__impl_8h.html#afe951ac62b5b06848cb4e6f4dbc69616">WINDOW_G</a>), *<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g, &gj, cb);</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span> </div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="preprocessor">#ifdef USE_ENDOMORPHISM</span></div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  {</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <a class="code" href="structsecp256k1__gej.html">secp256k1_gej</a> g_128j;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keywordtype">int</span> i;</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span> </div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g_128 = (<a class="code" href="structsecp256k1__ge__storage.html">secp256k1_ge_storage</a> (*)[])<a class="code" href="secp256k1_2src_2util_8h.html#a20790114658c559e5048a38694708c3e">checked_malloc</a>(cb, <span class="keyword">sizeof</span>((*<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g_128)[0]) * <a class="code" href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1">ECMULT_TABLE_SIZE</a>(<a class="code" href="ecmult__impl_8h.html#afe951ac62b5b06848cb4e6f4dbc69616">WINDOW_G</a>));</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="comment">/* calculate 2^128*generator */</span></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  g_128j = gj;</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordflow">for</span> (i = 0; i < 128; i++) {</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <a class="code" href="group_8h.html#a033aa434a4d0838f649ad757dd44db46">secp256k1_gej_double_var</a>(&g_128j, &g_128j, NULL);</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  }</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <a class="code" href="ecmult__impl_8h.html#a72a05df0626a92692be8ca5e68c19a56">secp256k1_ecmult_odd_multiples_table_storage_var</a>(<a class="code" href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1">ECMULT_TABLE_SIZE</a>(<a class="code" href="ecmult__impl_8h.html#afe951ac62b5b06848cb4e6f4dbc69616">WINDOW_G</a>), *<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g_128, &g_128j, cb);</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  }</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> }</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div><div class="line"><a name="l00179"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#a95a3e0c69a07d94a248cdb06328966f6"> 179</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="ecmult__impl_8h.html#a95a3e0c69a07d94a248cdb06328966f6">secp256k1_ecmult_context_clone</a>(<a class="code" href="structsecp256k1__ecmult__context.html">secp256k1_ecmult_context</a> *dst,</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keyword">const</span> <a class="code" href="structsecp256k1__ecmult__context.html">secp256k1_ecmult_context</a> *src, <span class="keyword">const</span> <a class="code" href="structsecp256k1__callback.html">secp256k1_callback</a> *cb) {</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordflow">if</span> (src-><a class="code" href="structsecp256k1__ecmult__context.html#ac517c6e7e4f131328f395123fe4cb536">pre_g</a> == NULL) {</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  dst-><a class="code" href="structsecp256k1__ecmult__context.html#ac517c6e7e4f131328f395123fe4cb536">pre_g</a> = NULL;</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordtype">size_t</span> size = <span class="keyword">sizeof</span>((*dst-><a class="code" href="structsecp256k1__ecmult__context.html#ac517c6e7e4f131328f395123fe4cb536">pre_g</a>)[0]) * <a class="code" href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1">ECMULT_TABLE_SIZE</a>(<a class="code" href="ecmult__impl_8h.html#afe951ac62b5b06848cb4e6f4dbc69616">WINDOW_G</a>);</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  dst-><a class="code" href="structsecp256k1__ecmult__context.html#ac517c6e7e4f131328f395123fe4cb536">pre_g</a> = (<a class="code" href="structsecp256k1__ge__storage.html">secp256k1_ge_storage</a> (*)[])<a class="code" href="secp256k1_2src_2util_8h.html#a20790114658c559e5048a38694708c3e">checked_malloc</a>(cb, size);</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <a class="code" href="glibc__compat_8cpp.html#a0f46826ab0466591e136db24394923cf">memcpy</a>(dst-><a class="code" href="structsecp256k1__ecmult__context.html#ac517c6e7e4f131328f395123fe4cb536">pre_g</a>, src-><a class="code" href="structsecp256k1__ecmult__context.html#ac517c6e7e4f131328f395123fe4cb536">pre_g</a>, size);</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  }</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="preprocessor">#ifdef USE_ENDOMORPHISM</span></div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordflow">if</span> (src->pre_g_128 == NULL) {</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  dst->pre_g_128 = NULL;</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keywordtype">size_t</span> size = <span class="keyword">sizeof</span>((*dst->pre_g_128)[0]) * <a class="code" href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1">ECMULT_TABLE_SIZE</a>(<a class="code" href="ecmult__impl_8h.html#afe951ac62b5b06848cb4e6f4dbc69616">WINDOW_G</a>);</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  dst->pre_g_128 = (<a class="code" href="structsecp256k1__ge__storage.html">secp256k1_ge_storage</a> (*)[])<a class="code" href="secp256k1_2src_2util_8h.html#a20790114658c559e5048a38694708c3e">checked_malloc</a>(cb, size);</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <a class="code" href="glibc__compat_8cpp.html#a0f46826ab0466591e136db24394923cf">memcpy</a>(dst->pre_g_128, src->pre_g_128, size);</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  }</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span> }</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> </div><div class="line"><a name="l00199"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#aa4f6f213989d3ec35850c40c8f1b313b"> 199</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="ecmult__impl_8h.html#aa4f6f213989d3ec35850c40c8f1b313b">secp256k1_ecmult_context_is_built</a>(<span class="keyword">const</span> <a class="code" href="structsecp256k1__ecmult__context.html">secp256k1_ecmult_context</a> *<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>) {</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">return</span> <a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g != NULL;</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> }</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> </div><div class="line"><a name="l00203"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#a0e60dbc86c237360d13ac9433caa13af"> 203</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="ecmult__impl_8h.html#a0e60dbc86c237360d13ac9433caa13af">secp256k1_ecmult_context_clear</a>(<a class="code" href="structsecp256k1__ecmult__context.html">secp256k1_ecmult_context</a> *<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>) {</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  free(<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g);</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="preprocessor">#ifdef USE_ENDOMORPHISM</span></div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  free(<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g_128);</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <a class="code" href="ecmult__impl_8h.html#a3d2b8a81ffed27e7eca0058eb65831b5">secp256k1_ecmult_context_init</a>(<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>);</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> }</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div><div class="line"><a name="l00218"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#a48a8b6bbead18d4475c8a29d28376c5b"> 218</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="ecmult__impl_8h.html#a48a8b6bbead18d4475c8a29d28376c5b">secp256k1_ecmult_wnaf</a>(<span class="keywordtype">int</span> *wnaf, <span class="keywordtype">int</span> len, <span class="keyword">const</span> <a class="code" href="structsecp256k1__scalar.html">secp256k1_scalar</a> *a, <span class="keywordtype">int</span> w) {</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <a class="code" href="structsecp256k1__scalar.html">secp256k1_scalar</a> s = *a;</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordtype">int</span> last_set_bit = -1;</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordtype">int</span> bit = 0;</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordtype">int</span> sign = 1;</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordtype">int</span> carry = 0;</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> </div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <a class="code" href="secp256k1_2src_2util_8h.html#aca8ac5ae73fd966db106de59160a178b">VERIFY_CHECK</a>(wnaf != NULL);</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <a class="code" href="secp256k1_2src_2util_8h.html#aca8ac5ae73fd966db106de59160a178b">VERIFY_CHECK</a>(0 <= len && len <= 256);</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <a class="code" href="secp256k1_2src_2util_8h.html#aca8ac5ae73fd966db106de59160a178b">VERIFY_CHECK</a>(a != NULL);</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <a class="code" href="secp256k1_2src_2util_8h.html#aca8ac5ae73fd966db106de59160a178b">VERIFY_CHECK</a>(2 <= w && w <= 31);</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span> </div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  memset(wnaf, 0, len * <span class="keyword">sizeof</span>(wnaf[0]));</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> </div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keywordflow">if</span> (<a class="code" href="scalar_8h.html#a70d7af05e9c9a579ed5cb20d9f22eeba">secp256k1_scalar_get_bits</a>(&s, 255, 1)) {</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <a class="code" href="scalar_8h.html#aa3f1c1d4536adf835ee256878c222968">secp256k1_scalar_negate</a>(&s, &s);</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  sign = -1;</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  }</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> </div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordflow">while</span> (bit < len) {</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordtype">int</span> now;</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keywordtype">int</span> word;</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">if</span> (<a class="code" href="scalar_8h.html#a70d7af05e9c9a579ed5cb20d9f22eeba">secp256k1_scalar_get_bits</a>(&s, bit, 1) == (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>)carry) {</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  bit++;</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  }</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span> </div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  now = w;</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordflow">if</span> (now > len - bit) {</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  now = len - bit;</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  }</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span> </div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  word = <a class="code" href="scalar_8h.html#abede7dbe3b5a38a51b388d46f4c5b52d">secp256k1_scalar_get_bits_var</a>(&s, bit, now) + carry;</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span> </div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  carry = (word >> (w-1)) & 1;</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  word -= carry << w;</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span> </div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  wnaf[bit] = sign * word;</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  last_set_bit = bit;</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span> </div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  bit += now;</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  }</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span> <span class="preprocessor">#ifdef VERIFY</span></div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <a class="code" href="secp256k1_2src_2util_8h.html#aba1590ff86288c886c47dc8a27b30467">CHECK</a>(carry == 0);</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keywordflow">while</span> (bit < 256) {</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <a class="code" href="secp256k1_2src_2util_8h.html#aba1590ff86288c886c47dc8a27b30467">CHECK</a>(<a class="code" href="scalar_8h.html#a70d7af05e9c9a579ed5cb20d9f22eeba">secp256k1_scalar_get_bits</a>(&s, bit++, 1) == 0);</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  } </div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="keywordflow">return</span> last_set_bit + 1;</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span> }</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span> </div><div class="line"><a name="l00269"></a><span class="lineno"><a class="line" href="ecmult__impl_8h.html#aacf8b6ba48671daf24d549adb176366c"> 269</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="ecmult__impl_8h.html#aacf8b6ba48671daf24d549adb176366c">secp256k1_ecmult</a>(<span class="keyword">const</span> <a class="code" href="structsecp256k1__ecmult__context.html">secp256k1_ecmult_context</a> *<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>, <a class="code" href="structsecp256k1__gej.html">secp256k1_gej</a> *r, <span class="keyword">const</span> <a class="code" href="structsecp256k1__gej.html">secp256k1_gej</a> *a, <span class="keyword">const</span> <a class="code" href="structsecp256k1__scalar.html">secp256k1_scalar</a> *na, <span class="keyword">const</span> <a class="code" href="structsecp256k1__scalar.html">secp256k1_scalar</a> *ng) {</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <a class="code" href="structsecp256k1__ge.html">secp256k1_ge</a> pre_a[<a class="code" href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1">ECMULT_TABLE_SIZE</a>(<a class="code" href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718">WINDOW_A</a>)];</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <a class="code" href="structsecp256k1__ge.html">secp256k1_ge</a> tmpa;</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <a class="code" href="structsecp256k1__fe.html">secp256k1_fe</a> Z;</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="preprocessor">#ifdef USE_ENDOMORPHISM</span></div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <a class="code" href="structsecp256k1__ge.html">secp256k1_ge</a> pre_a_lam[<a class="code" href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1">ECMULT_TABLE_SIZE</a>(<a class="code" href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718">WINDOW_A</a>)];</div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <a class="code" href="structsecp256k1__scalar.html">secp256k1_scalar</a> na_1, na_lam;</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="comment">/* Splitted G factors. */</span></div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <a class="code" href="structsecp256k1__scalar.html">secp256k1_scalar</a> ng_1, ng_128;</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keywordtype">int</span> wnaf_na_1[130];</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keywordtype">int</span> wnaf_na_lam[130];</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keywordtype">int</span> bits_na_1;</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keywordtype">int</span> bits_na_lam;</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordtype">int</span> wnaf_ng_1[129];</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keywordtype">int</span> bits_ng_1;</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordtype">int</span> wnaf_ng_128[129];</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keywordtype">int</span> bits_ng_128;</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keywordtype">int</span> wnaf_na[256];</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordtype">int</span> bits_na;</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="keywordtype">int</span> wnaf_ng[256];</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keywordtype">int</span> bits_ng;</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordtype">int</span> i;</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keywordtype">int</span> bits;</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span> </div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <span class="preprocessor">#ifdef USE_ENDOMORPHISM</span></div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="comment">/* split na into na_1 and na_lam (where na = na_1 + na_lam*lambda, and na_1 and na_lam are ~128 bit) */</span></div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  secp256k1_scalar_split_lambda(&na_1, &na_lam, na);</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span> </div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="comment">/* build wnaf representation for na_1 and na_lam. */</span></div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  bits_na_1 = <a class="code" href="ecmult__impl_8h.html#a48a8b6bbead18d4475c8a29d28376c5b">secp256k1_ecmult_wnaf</a>(wnaf_na_1, 130, &na_1, <a class="code" href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718">WINDOW_A</a>);</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  bits_na_lam = <a class="code" href="ecmult__impl_8h.html#a48a8b6bbead18d4475c8a29d28376c5b">secp256k1_ecmult_wnaf</a>(wnaf_na_lam, 130, &na_lam, <a class="code" href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718">WINDOW_A</a>);</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <a class="code" href="secp256k1_2src_2util_8h.html#aca8ac5ae73fd966db106de59160a178b">VERIFY_CHECK</a>(bits_na_1 <= 130);</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <a class="code" href="secp256k1_2src_2util_8h.html#aca8ac5ae73fd966db106de59160a178b">VERIFY_CHECK</a>(bits_na_lam <= 130);</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  bits = bits_na_1;</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordflow">if</span> (bits_na_lam > bits) {</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  bits = bits_na_lam;</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  }</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="comment">/* build wnaf representation for na. */</span></div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  bits_na = <a class="code" href="ecmult__impl_8h.html#a48a8b6bbead18d4475c8a29d28376c5b">secp256k1_ecmult_wnaf</a>(wnaf_na, 256, na, <a class="code" href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718">WINDOW_A</a>);</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  bits = bits_na;</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span> </div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="comment">/* Calculate odd multiples of a.</span></div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="comment"> * All multiples are brought to the same Z 'denominator', which is stored</span></div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="comment"> * in Z. Due to secp256k1' isomorphism we can do all operations pretending</span></div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span> <span class="comment"> * that the Z coordinate was 1, use affine addition formulae, and correct</span></div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="comment"> * the Z coordinate of the result once at the end.</span></div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span> <span class="comment"> * The exception is the precomputed G table points, which are actually</span></div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="comment"> * affine. Compared to the base used for other points, they have a Z ratio</span></div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span> <span class="comment"> * of 1/Z, so we can use secp256k1_gej_add_zinv_var, which uses the same</span></div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span> <span class="comment"> * isomorphism to efficiently add with a known Z inverse.</span></div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span> <span class="comment"> */</span></div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <a class="code" href="ecmult__impl_8h.html#a33fe27d5aa383017999f80a1cdd8d8ca">secp256k1_ecmult_odd_multiples_table_globalz_windowa</a>(pre_a, &Z, a);</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span> </div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span> <span class="preprocessor">#ifdef USE_ENDOMORPHISM</span></div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <span class="keywordflow">for</span> (i = 0; i < <a class="code" href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1">ECMULT_TABLE_SIZE</a>(<a class="code" href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718">WINDOW_A</a>); i++) {</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  secp256k1_ge_mul_lambda(&pre_a_lam[i], &pre_a[i]);</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  }</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span> </div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="comment">/* split ng into ng_1 and ng_128 (where gn = gn_1 + gn_128*2^128, and gn_1 and gn_128 are ~128 bit) */</span></div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  secp256k1_scalar_split_128(&ng_1, &ng_128, ng);</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span> </div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <span class="comment">/* Build wnaf representation for ng_1 and ng_128 */</span></div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  bits_ng_1 = <a class="code" href="ecmult__impl_8h.html#a48a8b6bbead18d4475c8a29d28376c5b">secp256k1_ecmult_wnaf</a>(wnaf_ng_1, 129, &ng_1, <a class="code" href="ecmult__impl_8h.html#afe951ac62b5b06848cb4e6f4dbc69616">WINDOW_G</a>);</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  bits_ng_128 = <a class="code" href="ecmult__impl_8h.html#a48a8b6bbead18d4475c8a29d28376c5b">secp256k1_ecmult_wnaf</a>(wnaf_ng_128, 129, &ng_128, <a class="code" href="ecmult__impl_8h.html#afe951ac62b5b06848cb4e6f4dbc69616">WINDOW_G</a>);</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  <span class="keywordflow">if</span> (bits_ng_1 > bits) {</div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  bits = bits_ng_1;</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  }</div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keywordflow">if</span> (bits_ng_128 > bits) {</div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  bits = bits_ng_128;</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  }</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  bits_ng = <a class="code" href="ecmult__impl_8h.html#a48a8b6bbead18d4475c8a29d28376c5b">secp256k1_ecmult_wnaf</a>(wnaf_ng, 256, ng, <a class="code" href="ecmult__impl_8h.html#afe951ac62b5b06848cb4e6f4dbc69616">WINDOW_G</a>);</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keywordflow">if</span> (bits_ng > bits) {</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  bits = bits_ng;</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  }</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span> </div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <a class="code" href="group_8h.html#a2c6b24a2db08260d89e891eab7035b2c">secp256k1_gej_set_infinity</a>(r);</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span> </div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  <span class="keywordflow">for</span> (i = bits - 1; i >= 0; i--) {</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="keywordtype">int</span> <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>;</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <a class="code" href="group_8h.html#a033aa434a4d0838f649ad757dd44db46">secp256k1_gej_double_var</a>(r, r, NULL);</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span> <span class="preprocessor">#ifdef USE_ENDOMORPHISM</span></div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <span class="keywordflow">if</span> (i < bits_na_1 && (<a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a> = wnaf_na_1[i])) {</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <a class="code" href="ecmult__impl_8h.html#afe9218069a15709b99aacd7af0ba2636">ECMULT_TABLE_GET_GE</a>(&tmpa, pre_a, <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>, <a class="code" href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718">WINDOW_A</a>);</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <a class="code" href="group_8h.html#a4d0338f50b08d082caa32f8e72707b55">secp256k1_gej_add_ge_var</a>(r, r, &tmpa, NULL);</div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  }</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keywordflow">if</span> (i < bits_na_lam && (<a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a> = wnaf_na_lam[i])) {</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <a class="code" href="ecmult__impl_8h.html#afe9218069a15709b99aacd7af0ba2636">ECMULT_TABLE_GET_GE</a>(&tmpa, pre_a_lam, <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>, <a class="code" href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718">WINDOW_A</a>);</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <a class="code" href="group_8h.html#a4d0338f50b08d082caa32f8e72707b55">secp256k1_gej_add_ge_var</a>(r, r, &tmpa, NULL);</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  }</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keywordflow">if</span> (i < bits_ng_1 && (<a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a> = wnaf_ng_1[i])) {</div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <a class="code" href="ecmult__impl_8h.html#a45d4a36e1a06a0214837d20789239f8b">ECMULT_TABLE_GET_GE_STORAGE</a>(&tmpa, *<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g, <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>, <a class="code" href="ecmult__impl_8h.html#afe951ac62b5b06848cb4e6f4dbc69616">WINDOW_G</a>);</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <a class="code" href="group_8h.html#a180d4e54e906f101ce0f1e74563ce5f6">secp256k1_gej_add_zinv_var</a>(r, r, &tmpa, &Z);</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  }</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="keywordflow">if</span> (i < bits_ng_128 && (<a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a> = wnaf_ng_128[i])) {</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <a class="code" href="ecmult__impl_8h.html#a45d4a36e1a06a0214837d20789239f8b">ECMULT_TABLE_GET_GE_STORAGE</a>(&tmpa, *<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g_128, <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>, <a class="code" href="ecmult__impl_8h.html#afe951ac62b5b06848cb4e6f4dbc69616">WINDOW_G</a>);</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <a class="code" href="group_8h.html#a180d4e54e906f101ce0f1e74563ce5f6">secp256k1_gej_add_zinv_var</a>(r, r, &tmpa, &Z);</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  }</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <span class="keywordflow">if</span> (i < bits_na && (<a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a> = wnaf_na[i])) {</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <a class="code" href="ecmult__impl_8h.html#afe9218069a15709b99aacd7af0ba2636">ECMULT_TABLE_GET_GE</a>(&tmpa, pre_a, <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>, <a class="code" href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718">WINDOW_A</a>);</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <a class="code" href="group_8h.html#a4d0338f50b08d082caa32f8e72707b55">secp256k1_gej_add_ge_var</a>(r, r, &tmpa, NULL);</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  }</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keywordflow">if</span> (i < bits_ng && (<a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a> = wnaf_ng[i])) {</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <a class="code" href="ecmult__impl_8h.html#a45d4a36e1a06a0214837d20789239f8b">ECMULT_TABLE_GET_GE_STORAGE</a>(&tmpa, *<a class="code" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>->pre_g, <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>, <a class="code" href="ecmult__impl_8h.html#afe951ac62b5b06848cb4e6f4dbc69616">WINDOW_G</a>);</div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <a class="code" href="group_8h.html#a180d4e54e906f101ce0f1e74563ce5f6">secp256k1_gej_add_zinv_var</a>(r, r, &tmpa, &Z);</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  }</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  }</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span> </div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="keywordflow">if</span> (!r-><a class="code" href="structsecp256k1__gej.html#ab3ec8168caf27aa3a092d512eaadaad9">infinity</a>) {</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <a class="code" href="field_8h.html#a542b97d2574d9687c563d002587cf9a2">secp256k1_fe_mul</a>(&r-><a class="code" href="structsecp256k1__gej.html#ae41776408dba32cbe28b5e345b5f2286">z</a>, &r-><a class="code" href="structsecp256k1__gej.html#ae41776408dba32cbe28b5e345b5f2286">z</a>, &Z);</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  }</div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span> }</div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span> </div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="group_8h_html_a5391d63ab98be9202d5f14611133fe35"><div class="ttname"><a href="group_8h.html#a5391d63ab98be9202d5f14611133fe35">secp256k1_ge_globalz_set_table_gej</a></div><div class="ttdeci">static void secp256k1_ge_globalz_set_table_gej(size_t len, secp256k1_ge *r, secp256k1_fe *globalz, const secp256k1_gej *a, const secp256k1_fe *zr)</div></div>
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<div class="ttc" id="secp256k1_2src_2util_8h_html_aca8ac5ae73fd966db106de59160a178b"><div class="ttname"><a href="secp256k1_2src_2util_8h.html#aca8ac5ae73fd966db106de59160a178b">VERIFY_CHECK</a></div><div class="ttdeci">#define VERIFY_CHECK(cond)</div><div class="ttdef"><b>Definition:</b> <a href="secp256k1_2src_2util_8h_source.html#l00064">util.h:64</a></div></div>
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<div class="ttc" id="ecmult__impl_8h_html_aa4f6f213989d3ec35850c40c8f1b313b"><div class="ttname"><a href="ecmult__impl_8h.html#aa4f6f213989d3ec35850c40c8f1b313b">secp256k1_ecmult_context_is_built</a></div><div class="ttdeci">static int secp256k1_ecmult_context_is_built(const secp256k1_ecmult_context *ctx)</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00199">ecmult_impl.h:199</a></div></div>
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<div class="ttc" id="ecmult__impl_8h_html_a95a3e0c69a07d94a248cdb06328966f6"><div class="ttname"><a href="ecmult__impl_8h.html#a95a3e0c69a07d94a248cdb06328966f6">secp256k1_ecmult_context_clone</a></div><div class="ttdeci">static void secp256k1_ecmult_context_clone(secp256k1_ecmult_context *dst, const secp256k1_ecmult_context *src, const secp256k1_callback *cb)</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00179">ecmult_impl.h:179</a></div></div>
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<div class="ttc" id="structsecp256k1__fe_html"><div class="ttname"><a href="structsecp256k1__fe.html">secp256k1_fe</a></div><div class="ttdef"><b>Definition:</b> <a href="field__10x26_8h_source.html#l00012">field_10x26.h:12</a></div></div>
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<div class="ttc" id="ecmult__impl_8h_html_a0e60dbc86c237360d13ac9433caa13af"><div class="ttname"><a href="ecmult__impl_8h.html#a0e60dbc86c237360d13ac9433caa13af">secp256k1_ecmult_context_clear</a></div><div class="ttdeci">static void secp256k1_ecmult_context_clear(secp256k1_ecmult_context *ctx)</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00203">ecmult_impl.h:203</a></div></div>
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<div class="ttc" id="ecmult__impl_8h_html_a3d2b8a81ffed27e7eca0058eb65831b5"><div class="ttname"><a href="ecmult__impl_8h.html#a3d2b8a81ffed27e7eca0058eb65831b5">secp256k1_ecmult_context_init</a></div><div class="ttdeci">static void secp256k1_ecmult_context_init(secp256k1_ecmult_context *ctx)</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00140">ecmult_impl.h:140</a></div></div>
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<div class="ttc" id="field_8h_html_a542b97d2574d9687c563d002587cf9a2"><div class="ttname"><a href="field_8h.html#a542b97d2574d9687c563d002587cf9a2">secp256k1_fe_mul</a></div><div class="ttdeci">static void secp256k1_fe_mul(secp256k1_fe *r, const secp256k1_fe *a, const secp256k1_fe *SECP256K1_RESTRICT b)</div></div>
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<div class="ttc" id="structsecp256k1__gej_html_a7d2451c89411d62628ac466eb28c8ff5"><div class="ttname"><a href="structsecp256k1__gej.html#a7d2451c89411d62628ac466eb28c8ff5">secp256k1_gej::x</a></div><div class="ttdeci">secp256k1_fe x</div><div class="ttdef"><b>Definition:</b> <a href="group_8h_source.html#l00025">group.h:25</a></div></div>
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<div class="ttc" id="group_8h_html"><div class="ttname"><a href="group_8h.html">group.h</a></div></div>
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<div class="ttc" id="scalar_8h_html_a70d7af05e9c9a579ed5cb20d9f22eeba"><div class="ttname"><a href="scalar_8h.html#a70d7af05e9c9a579ed5cb20d9f22eeba">secp256k1_scalar_get_bits</a></div><div class="ttdeci">static unsigned int secp256k1_scalar_get_bits(const secp256k1_scalar *a, unsigned int offset, unsigned int count)</div></div>
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<div class="ttc" id="scalar_8h_html_aa3f1c1d4536adf835ee256878c222968"><div class="ttname"><a href="scalar_8h.html#aa3f1c1d4536adf835ee256878c222968">secp256k1_scalar_negate</a></div><div class="ttdeci">static void secp256k1_scalar_negate(secp256k1_scalar *r, const secp256k1_scalar *a)</div></div>
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<div class="ttc" id="ecmult__impl_8h_html_a72a05df0626a92692be8ca5e68c19a56"><div class="ttname"><a href="ecmult__impl_8h.html#a72a05df0626a92692be8ca5e68c19a56">secp256k1_ecmult_odd_multiples_table_storage_var</a></div><div class="ttdeci">static void secp256k1_ecmult_odd_multiples_table_storage_var(int n, secp256k1_ge_storage *pre, const secp256k1_gej *a, const secp256k1_callback *cb)</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00095">ecmult_impl.h:95</a></div></div>
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<div class="ttc" id="ecmult__impl_8h_html_a45d4a36e1a06a0214837d20789239f8b"><div class="ttname"><a href="ecmult__impl_8h.html#a45d4a36e1a06a0214837d20789239f8b">ECMULT_TABLE_GET_GE_STORAGE</a></div><div class="ttdeci">#define ECMULT_TABLE_GET_GE_STORAGE(r, pre, n, w)</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00128">ecmult_impl.h:128</a></div></div>
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<div class="ttc" id="ecmult__impl_8h_html_a97c6c6e5aa98f202eec77c4c931e02f1"><div class="ttname"><a href="ecmult__impl_8h.html#a97c6c6e5aa98f202eec77c4c931e02f1">ECMULT_TABLE_SIZE</a></div><div class="ttdeci">#define ECMULT_TABLE_SIZE(w)</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00028">ecmult_impl.h:28</a></div></div>
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<div class="ttc" id="group_8h_html_a180d4e54e906f101ce0f1e74563ce5f6"><div class="ttname"><a href="group_8h.html#a180d4e54e906f101ce0f1e74563ce5f6">secp256k1_gej_add_zinv_var</a></div><div class="ttdeci">static void secp256k1_gej_add_zinv_var(secp256k1_gej *r, const secp256k1_gej *a, const secp256k1_ge *b, const secp256k1_fe *bzinv)</div></div>
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<div class="ttc" id="structsecp256k1__gej_html"><div class="ttname"><a href="structsecp256k1__gej.html">secp256k1_gej</a></div><div class="ttdef"><b>Definition:</b> <a href="group_8h_source.html#l00024">group.h:24</a></div></div>
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<div class="ttc" id="group_8h_html_a2c6b24a2db08260d89e891eab7035b2c"><div class="ttname"><a href="group_8h.html#a2c6b24a2db08260d89e891eab7035b2c">secp256k1_gej_set_infinity</a></div><div class="ttdeci">static void secp256k1_gej_set_infinity(secp256k1_gej *r)</div></div>
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<div class="ttc" id="group_8h_html_a4d0338f50b08d082caa32f8e72707b55"><div class="ttname"><a href="group_8h.html#a4d0338f50b08d082caa32f8e72707b55">secp256k1_gej_add_ge_var</a></div><div class="ttdeci">static void secp256k1_gej_add_ge_var(secp256k1_gej *r, const secp256k1_gej *a, const secp256k1_ge *b, secp256k1_fe *rzr)</div></div>
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<div class="ttc" id="group_8h_html_a033aa434a4d0838f649ad757dd44db46"><div class="ttname"><a href="group_8h.html#a033aa434a4d0838f649ad757dd44db46">secp256k1_gej_double_var</a></div><div class="ttdeci">static void secp256k1_gej_double_var(secp256k1_gej *r, const secp256k1_gej *a, secp256k1_fe *rzr)</div></div>
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<div class="ttc" id="group__impl_8h_html_ac2075a99877abe469ea60a119fe68e6c"><div class="ttname"><a href="group__impl_8h.html#ac2075a99877abe469ea60a119fe68e6c">secp256k1_ge_const_g</a></div><div class="ttdeci">static const secp256k1_ge secp256k1_ge_const_g</div><div class="ttdef"><b>Definition:</b> <a href="group__impl_8h_source.html#l00019">group_impl.h:19</a></div></div>
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<div class="ttc" id="ecmult__impl_8h_html_afe951ac62b5b06848cb4e6f4dbc69616"><div class="ttname"><a href="ecmult__impl_8h.html#afe951ac62b5b06848cb4e6f4dbc69616">WINDOW_G</a></div><div class="ttdeci">#define WINDOW_G</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00024">ecmult_impl.h:24</a></div></div>
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<div class="ttc" id="namespacefix-copyright-headers_html_aed10e06fbf20b2e50f73ff2d61f59e45"><div class="ttname"><a href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">fix-copyright-headers.n</a></div><div class="ttdeci">int n</div><div class="ttdef"><b>Definition:</b> <a href="fix-copyright-headers_8py_source.html#l00046">fix-copyright-headers.py:46</a></div></div>
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<div class="ttc" id="structsecp256k1__ge__storage_html"><div class="ttname"><a href="structsecp256k1__ge__storage.html">secp256k1_ge_storage</a></div><div class="ttdef"><b>Definition:</b> <a href="group_8h_source.html#l00034">group.h:34</a></div></div>
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<div class="ttc" id="ecmult__impl_8h_html_a33fe27d5aa383017999f80a1cdd8d8ca"><div class="ttname"><a href="ecmult__impl_8h.html#a33fe27d5aa383017999f80a1cdd8d8ca">secp256k1_ecmult_odd_multiples_table_globalz_windowa</a></div><div class="ttdeci">static void secp256k1_ecmult_odd_multiples_table_globalz_windowa(secp256k1_ge *pre, secp256k1_fe *globalz, const secp256k1_gej *a)</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00085">ecmult_impl.h:85</a></div></div>
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<div class="ttc" id="group_8h_html_a1cf9611464711ed63bde94d92ecc70de"><div class="ttname"><a href="group_8h.html#a1cf9611464711ed63bde94d92ecc70de">secp256k1_ge_set_table_gej_var</a></div><div class="ttdeci">static void secp256k1_ge_set_table_gej_var(size_t len, secp256k1_ge *r, const secp256k1_gej *a, const secp256k1_fe *zr)</div></div>
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<div class="ttc" id="tests_8c_html_a06a3e29ada83211a695a49e8f7405842"><div class="ttname"><a href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a></div><div class="ttdeci">static secp256k1_context * ctx</div><div class="ttdef"><b>Definition:</b> <a href="tests_8c_source.html#l00042">tests.c:42</a></div></div>
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<div class="ttc" id="structsecp256k1__gej_html_ab3ec8168caf27aa3a092d512eaadaad9"><div class="ttname"><a href="structsecp256k1__gej.html#ab3ec8168caf27aa3a092d512eaadaad9">secp256k1_gej::infinity</a></div><div class="ttdeci">int infinity</div><div class="ttdef"><b>Definition:</b> <a href="group_8h_source.html#l00028">group.h:28</a></div></div>
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<div class="ttc" id="scalar_8h_html"><div class="ttname"><a href="scalar_8h.html">scalar.h</a></div></div>
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<div class="ttc" id="structsecp256k1__ge_html"><div class="ttname"><a href="structsecp256k1__ge.html">secp256k1_ge</a></div><div class="ttdef"><b>Definition:</b> <a href="group_8h_source.html#l00014">group.h:14</a></div></div>
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<div class="ttc" id="structsecp256k1__ge_html_a3c04a97b606c82ea87e55d4a06f06b6e"><div class="ttname"><a href="structsecp256k1__ge.html#a3c04a97b606c82ea87e55d4a06f06b6e">secp256k1_ge::x</a></div><div class="ttdeci">secp256k1_fe x</div><div class="ttdef"><b>Definition:</b> <a href="group_8h_source.html#l00015">group.h:15</a></div></div>
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<div class="ttc" id="secp256k1_2src_2util_8h_html_aba1590ff86288c886c47dc8a27b30467"><div class="ttname"><a href="secp256k1_2src_2util_8h.html#aba1590ff86288c886c47dc8a27b30467">CHECK</a></div><div class="ttdeci">#define CHECK(cond)</div><div class="ttdef"><b>Definition:</b> <a href="secp256k1_2src_2util_8h_source.html#l00052">util.h:52</a></div></div>
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<div class="ttc" id="structsecp256k1__scalar_html"><div class="ttname"><a href="structsecp256k1__scalar.html">secp256k1_scalar</a></div><div class="ttdef"><b>Definition:</b> <a href="scalar__4x64_8h_source.html#l00013">scalar_4x64.h:13</a></div></div>
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<div class="ttc" id="structsecp256k1__ge_html_a1cdb35fe7abf6f17c08e4375eeb26628"><div class="ttname"><a href="structsecp256k1__ge.html#a1cdb35fe7abf6f17c08e4375eeb26628">secp256k1_ge::infinity</a></div><div class="ttdeci">int infinity</div><div class="ttdef"><b>Definition:</b> <a href="group_8h_source.html#l00017">group.h:17</a></div></div>
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<div class="ttc" id="ecmult__impl_8h_html_a6216c81c6adbb8796c55fe0c8d3b6718"><div class="ttname"><a href="ecmult__impl_8h.html#a6216c81c6adbb8796c55fe0c8d3b6718">WINDOW_A</a></div><div class="ttdeci">#define WINDOW_A</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00015">ecmult_impl.h:15</a></div></div>
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<div class="ttc" id="ecmult__impl_8h_html_afe9218069a15709b99aacd7af0ba2636"><div class="ttname"><a href="ecmult__impl_8h.html#afe9218069a15709b99aacd7af0ba2636">ECMULT_TABLE_GET_GE</a></div><div class="ttdeci">#define ECMULT_TABLE_GET_GE(r, pre, n, w)</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00117">ecmult_impl.h:117</a></div></div>
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<div class="ttc" id="group__impl_8h_html_a6492f6aad16e545239c0ec52780d2e1f"><div class="ttname"><a href="group__impl_8h.html#a6492f6aad16e545239c0ec52780d2e1f">secp256k1_ge_set_gej_zinv</a></div><div class="ttdeci">static void secp256k1_ge_set_gej_zinv(secp256k1_ge *r, const secp256k1_gej *a, const secp256k1_fe *zi)</div><div class="ttdef"><b>Definition:</b> <a href="group__impl_8h_source.html#l00026">group_impl.h:26</a></div></div>
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<div class="ttc" id="structsecp256k1__gej_html_ae41776408dba32cbe28b5e345b5f2286"><div class="ttname"><a href="structsecp256k1__gej.html#ae41776408dba32cbe28b5e345b5f2286">secp256k1_gej::z</a></div><div class="ttdeci">secp256k1_fe z</div><div class="ttdef"><b>Definition:</b> <a href="group_8h_source.html#l00027">group.h:27</a></div></div>
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<div class="ttc" id="ecmult__impl_8h_html_a5008191228d03c7325ea86aa8baaf4dc"><div class="ttname"><a href="ecmult__impl_8h.html#a5008191228d03c7325ea86aa8baaf4dc">secp256k1_ecmult_odd_multiples_table</a></div><div class="ttdeci">static void secp256k1_ecmult_odd_multiples_table(int n, secp256k1_gej *prej, secp256k1_fe *zr, const secp256k1_gej *a)</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00035">ecmult_impl.h:35</a></div></div>
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<div class="ttc" id="glibc__compat_8cpp_html_a0f46826ab0466591e136db24394923cf"><div class="ttname"><a href="glibc__compat_8cpp.html#a0f46826ab0466591e136db24394923cf">memcpy</a></div><div class="ttdeci">void * memcpy(void *a, const void *b, size_t c)</div><div class="ttdef"><b>Definition:</b> <a href="glibc__compat_8cpp_source.html#l00017">glibc_compat.cpp:17</a></div></div>
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<div class="ttc" id="ecmult_8h_html"><div class="ttname"><a href="ecmult_8h.html">ecmult.h</a></div></div>
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<div class="ttc" id="scalar_8h_html_abede7dbe3b5a38a51b388d46f4c5b52d"><div class="ttname"><a href="scalar_8h.html#abede7dbe3b5a38a51b388d46f4c5b52d">secp256k1_scalar_get_bits_var</a></div><div class="ttdeci">static unsigned int secp256k1_scalar_get_bits_var(const secp256k1_scalar *a, unsigned int offset, unsigned int count)</div></div>
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<div class="ttc" id="structsecp256k1__ecmult__context_html"><div class="ttname"><a href="structsecp256k1__ecmult__context.html">secp256k1_ecmult_context</a></div><div class="ttdef"><b>Definition:</b> <a href="ecmult_8h_source.html#l00013">ecmult.h:13</a></div></div>
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<div class="ttc" id="group_8h_html_ad5f813e26afb239f03e83f0e61e05498"><div class="ttname"><a href="group_8h.html#ad5f813e26afb239f03e83f0e61e05498">secp256k1_gej_set_ge</a></div><div class="ttdeci">static void secp256k1_gej_set_ge(secp256k1_gej *r, const secp256k1_ge *a)</div></div>
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<div class="ttc" id="structsecp256k1__gej_html_a29d5184060ad790d85a0c89a13820e0d"><div class="ttname"><a href="structsecp256k1__gej.html#a29d5184060ad790d85a0c89a13820e0d">secp256k1_gej::y</a></div><div class="ttdeci">secp256k1_fe y</div><div class="ttdef"><b>Definition:</b> <a href="group_8h_source.html#l00026">group.h:26</a></div></div>
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<div class="ttc" id="ecmult__impl_8h_html_a48a8b6bbead18d4475c8a29d28376c5b"><div class="ttname"><a href="ecmult__impl_8h.html#a48a8b6bbead18d4475c8a29d28376c5b">secp256k1_ecmult_wnaf</a></div><div class="ttdeci">static int secp256k1_ecmult_wnaf(int *wnaf, int len, const secp256k1_scalar *a, int w)</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00218">ecmult_impl.h:218</a></div></div>
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<div class="ttc" id="ecmult__impl_8h_html_aacf8b6ba48671daf24d549adb176366c"><div class="ttname"><a href="ecmult__impl_8h.html#aacf8b6ba48671daf24d549adb176366c">secp256k1_ecmult</a></div><div class="ttdeci">static void secp256k1_ecmult(const secp256k1_ecmult_context *ctx, secp256k1_gej *r, const secp256k1_gej *a, const secp256k1_scalar *na, const secp256k1_scalar *ng)</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00269">ecmult_impl.h:269</a></div></div>
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<div class="ttc" id="structsecp256k1__ge_html_a604295983a1f4aa6e8b5b0f1e46f9ee0"><div class="ttname"><a href="structsecp256k1__ge.html#a604295983a1f4aa6e8b5b0f1e46f9ee0">secp256k1_ge::y</a></div><div class="ttdeci">secp256k1_fe y</div><div class="ttdef"><b>Definition:</b> <a href="group_8h_source.html#l00016">group.h:16</a></div></div>
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<div class="ttc" id="structsecp256k1__callback_html"><div class="ttname"><a href="structsecp256k1__callback.html">secp256k1_callback</a></div><div class="ttdef"><b>Definition:</b> <a href="secp256k1_2src_2util_8h_source.html#l00018">util.h:18</a></div></div>
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<div class="ttc" id="group_8h_html_ad6499ae629f998e50d8614869ee3c67f"><div class="ttname"><a href="group_8h.html#ad6499ae629f998e50d8614869ee3c67f">secp256k1_ge_to_storage</a></div><div class="ttdeci">static void secp256k1_ge_to_storage(secp256k1_ge_storage *r, const secp256k1_ge *a)</div></div>
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<div class="ttc" id="secp256k1_2src_2util_8h_html_a20790114658c559e5048a38694708c3e"><div class="ttname"><a href="secp256k1_2src_2util_8h.html#a20790114658c559e5048a38694708c3e">checked_malloc</a></div><div class="ttdeci">static SECP256K1_INLINE void * checked_malloc(const secp256k1_callback *cb, size_t size)</div><div class="ttdef"><b>Definition:</b> <a href="secp256k1_2src_2util_8h_source.html#l00068">util.h:68</a></div></div>
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<div class="ttc" id="ecmult__impl_8h_html_acc2494f319c79f6cc15982f43e7a6f00"><div class="ttname"><a href="ecmult__impl_8h.html#acc2494f319c79f6cc15982f43e7a6f00">secp256k1_ecmult_context_build</a></div><div class="ttdeci">static void secp256k1_ecmult_context_build(secp256k1_ecmult_context *ctx, const secp256k1_callback *cb)</div><div class="ttdef"><b>Definition:</b> <a href="ecmult__impl_8h_source.html#l00147">ecmult_impl.h:147</a></div></div>
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<div class="ttc" id="structsecp256k1__ecmult__context_html_ac517c6e7e4f131328f395123fe4cb536"><div class="ttname"><a href="structsecp256k1__ecmult__context.html#ac517c6e7e4f131328f395123fe4cb536">secp256k1_ecmult_context::pre_g</a></div><div class="ttdeci">secp256k1_ge_storage(* pre_g)[]</div><div class="ttdef"><b>Definition:</b> <a href="ecmult_8h_source.html#l00015">ecmult.h:15</a></div></div>
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