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id="splitbar" style="-moz-user-select:none;" 52 class="ui-resizable-handle"> 53 </div> 54</div> 55<script type="text/javascript"> 56/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ 57$(document).ready(function(){initNavTree('group___ecdsa_primitives.html','');}); 58/* @license-end */ 59</script> 60<div id="doc-content"> 61<div class="header"> 62 <div class="summary"> 63<a href="#func-members">Functions</a> </div> 64 <div class="headertitle"> 65<div class="title">ecdsa<div class="ingroups"><a class="el" href="group___epid_module.html">epid&nbsp;</a> » <a class="el" href="group___epid_common.html">common</a> » <a class="el" href="group___epid_math.html">math</a></div></div> </div> 66</div><!--header--> 67<div class="contents"> 68 69<p>Elliptic Curve Digital Signature Algorithm Primitives. 70<a href="#details">More...</a></p> 71<table class="memberdecls"> 72<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a> 73Functions</h2></td></tr> 74<tr class="memitem:ga07e4ebd3423e1f6f9ae35f0608dde7c0"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group___error_codes.html#gafdb27c77c2c4b32c807e326a8a0da360">EpidStatus</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___ecdsa_primitives.html#ga07e4ebd3423e1f6f9ae35f0608dde7c0">EcdsaVerifyBuffer</a> (<a class="el" href="group___epid_types.html#gace6876a045f2c2694444b35ccb0844e2">ConstOctStr</a> buf, size_t buf_len, <a class="el" href="struct_ecdsa_public_key.html">EcdsaPublicKey</a> const *pubkey, <a class="el" href="struct_ecdsa_signature.html">EcdsaSignature</a> const *sig)</td></tr> 75<tr class="memdesc:ga07e4ebd3423e1f6f9ae35f0608dde7c0"><td class="mdescLeft"> </td><td class="mdescRight">Verifies authenticity of a digital signature over a buffer. <a href="#ga07e4ebd3423e1f6f9ae35f0608dde7c0">More...</a><br /></td></tr> 76<tr class="separator:ga07e4ebd3423e1f6f9ae35f0608dde7c0"><td class="memSeparator" colspan="2"> </td></tr> 77<tr class="memitem:gaef0e8a31e830fe9285b43a0969e6611a"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group___error_codes.html#gafdb27c77c2c4b32c807e326a8a0da360">EpidStatus</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___ecdsa_primitives.html#gaef0e8a31e830fe9285b43a0969e6611a">EcdsaSignBuffer</a> (<a class="el" href="group___epid_types.html#gace6876a045f2c2694444b35ccb0844e2">ConstOctStr</a> buf, size_t buf_len, <a class="el" href="struct_ecdsa_private_key.html">EcdsaPrivateKey</a> const *privkey, <a class="el" href="group___epid_common.html#ga6119a2c0323a3fca9e502b24bc378c2c">BitSupplier</a> rnd_func, void *rnd_param, <a class="el" href="struct_ecdsa_signature.html">EcdsaSignature</a> *sig)</td></tr> 78<tr class="memdesc:gaef0e8a31e830fe9285b43a0969e6611a"><td class="mdescLeft"> </td><td class="mdescRight">Creates ECDSA signature of buffer. <a href="#gaef0e8a31e830fe9285b43a0969e6611a">More...</a><br /></td></tr> 79<tr class="separator:gaef0e8a31e830fe9285b43a0969e6611a"><td class="memSeparator" colspan="2"> </td></tr> 80</table> 81<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> 82<p>Elliptic Curve Digital Signature Algorithm Primitives. </p> 83<p>Provides APIs for computing and checking buffer signatures using the Elliptic Curve Digital Signature Algorithm. </p> 84<h2 class="groupheader">Function Documentation</h2> 85<a id="gaef0e8a31e830fe9285b43a0969e6611a"></a> 86<h2 class="memtitle"><span class="permalink"><a href="#gaef0e8a31e830fe9285b43a0969e6611a">◆ </a></span>EcdsaSignBuffer()</h2> 87 88<div class="memitem"> 89<div class="memproto"> 90 <table class="memname"> 91 <tr> 92 <td class="memname"><a class="el" href="group___error_codes.html#gafdb27c77c2c4b32c807e326a8a0da360">EpidStatus</a> EcdsaSignBuffer </td> 93 <td>(</td> 94 <td class="paramtype"><a class="el" href="group___epid_types.html#gace6876a045f2c2694444b35ccb0844e2">ConstOctStr</a> </td> 95 <td class="paramname"><em>buf</em>, </td> 96 </tr> 97 <tr> 98 <td class="paramkey"></td> 99 <td></td> 100 <td class="paramtype">size_t </td> 101 <td class="paramname"><em>buf_len</em>, </td> 102 </tr> 103 <tr> 104 <td class="paramkey"></td> 105 <td></td> 106 <td class="paramtype"><a class="el" href="struct_ecdsa_private_key.html">EcdsaPrivateKey</a> const * </td> 107 <td class="paramname"><em>privkey</em>, </td> 108 </tr> 109 <tr> 110 <td class="paramkey"></td> 111 <td></td> 112 <td class="paramtype"><a class="el" href="group___epid_common.html#ga6119a2c0323a3fca9e502b24bc378c2c">BitSupplier</a> </td> 113 <td class="paramname"><em>rnd_func</em>, </td> 114 </tr> 115 <tr> 116 <td class="paramkey"></td> 117 <td></td> 118 <td class="paramtype">void * </td> 119 <td class="paramname"><em>rnd_param</em>, </td> 120 </tr> 121 <tr> 122 <td class="paramkey"></td> 123 <td></td> 124 <td class="paramtype"><a class="el" href="struct_ecdsa_signature.html">EcdsaSignature</a> * </td> 125 <td class="paramname"><em>sig</em> </td> 126 </tr> 127 <tr> 128 <td></td> 129 <td>)</td> 130 <td></td><td></td> 131 </tr> 132 </table> 133</div><div class="memdoc"> 134 135<p>Creates ECDSA signature of buffer. </p> 136<p>Uses Elliptic Curve Digital Signature Algorithm (ECDSA) to generate a signature of the SHA-256 hash of the input buffer with the provided private key.</p> 137<p>The operation is over the standard secp256r1 curve.</p> 138<dl class="params"><dt>Parameters</dt><dd> 139 <table class="params"> 140 <tr><td class="paramdir">[in]</td><td class="paramname">buf</td><td>Pointer to buffer containing message to sign. </td></tr> 141 <tr><td class="paramdir">[in]</td><td class="paramname">buf_len</td><td>The size of buf in bytes. </td></tr> 142 <tr><td class="paramdir">[in]</td><td class="paramname">privkey</td><td>The ECDSA private key on secp256r1 curve. </td></tr> 143 <tr><td class="paramdir">[in]</td><td class="paramname">rnd_func</td><td>Random number generator. </td></tr> 144 <tr><td class="paramdir">[in]</td><td class="paramname">rnd_param</td><td>Pass through context data for rnd_func. </td></tr> 145 <tr><td class="paramdir">[out]</td><td class="paramname">sig</td><td>The resulting ECDSA signature.</td></tr> 146 </table> 147 </dd> 148</dl> 149<dl class="section return"><dt>Returns</dt><dd><a class="el" href="group___error_codes.html#gafdb27c77c2c4b32c807e326a8a0da360" title="Return status for SDK functions. ">EpidStatus</a></dd></dl> 150<dl class="retval"><dt>Return values</dt><dd> 151 <table class="retval"> 152 <tr><td class="paramname"><a class="el" href="group___error_codes.html#ggafdb27c77c2c4b32c807e326a8a0da360a61234ad9610406da6bf7977afd72a357" title="reached max iteration for random number generation ">kEpidRandMaxIterErr</a></td><td>Failed to sign after maximum number of iterations due to bad luck in random number generation.</td></tr> 153 </table> 154 </dd> 155</dl> 156<dl class="section see"><dt>See also</dt><dd><a class="el" href="group___ecdsa_primitives.html#gaef0e8a31e830fe9285b43a0969e6611a" title="Creates ECDSA signature of buffer. ">EcdsaSignBuffer</a> </dd></dl> 157 158</div> 159</div> 160<a id="ga07e4ebd3423e1f6f9ae35f0608dde7c0"></a> 161<h2 class="memtitle"><span class="permalink"><a href="#ga07e4ebd3423e1f6f9ae35f0608dde7c0">◆ </a></span>EcdsaVerifyBuffer()</h2> 162 163<div class="memitem"> 164<div class="memproto"> 165 <table class="memname"> 166 <tr> 167 <td class="memname"><a class="el" href="group___error_codes.html#gafdb27c77c2c4b32c807e326a8a0da360">EpidStatus</a> EcdsaVerifyBuffer </td> 168 <td>(</td> 169 <td class="paramtype"><a class="el" href="group___epid_types.html#gace6876a045f2c2694444b35ccb0844e2">ConstOctStr</a> </td> 170 <td class="paramname"><em>buf</em>, </td> 171 </tr> 172 <tr> 173 <td class="paramkey"></td> 174 <td></td> 175 <td class="paramtype">size_t </td> 176 <td class="paramname"><em>buf_len</em>, </td> 177 </tr> 178 <tr> 179 <td class="paramkey"></td> 180 <td></td> 181 <td class="paramtype"><a class="el" href="struct_ecdsa_public_key.html">EcdsaPublicKey</a> const * </td> 182 <td class="paramname"><em>pubkey</em>, </td> 183 </tr> 184 <tr> 185 <td class="paramkey"></td> 186 <td></td> 187 <td class="paramtype"><a class="el" href="struct_ecdsa_signature.html">EcdsaSignature</a> const * </td> 188 <td class="paramname"><em>sig</em> </td> 189 </tr> 190 <tr> 191 <td></td> 192 <td>)</td> 193 <td></td><td></td> 194 </tr> 195 </table> 196</div><div class="memdoc"> 197 198<p>Verifies authenticity of a digital signature over a buffer. </p> 199<p>Uses Elliptic Curve Digital Signature Algorithm (ECDSA) to verify that the SHA-256 hash of the input buffer was signed with the private key corresponding to the provided public key.</p> 200<p>The operation is over the standard secp256r1 curve.</p> 201<dl class="section warning"><dt>Warning</dt><dd>It is the responsibility of the caller to verify the identity of the public key.</dd></dl> 202<dl class="params"><dt>Parameters</dt><dd> 203 <table class="params"> 204 <tr><td class="paramdir">[in]</td><td class="paramname">buf</td><td>Pointer to buffer containing message to verify. </td></tr> 205 <tr><td class="paramdir">[in]</td><td class="paramname">buf_len</td><td>The size of buf in bytes. </td></tr> 206 <tr><td class="paramdir">[in]</td><td class="paramname">pubkey</td><td>The ECDSA public key on secp256r1 curve. </td></tr> 207 <tr><td class="paramdir">[in]</td><td class="paramname">sig</td><td>The ECDSA signature to be verified.</td></tr> 208 </table> 209 </dd> 210</dl> 211<dl class="section return"><dt>Returns</dt><dd><a class="el" href="group___error_codes.html#gafdb27c77c2c4b32c807e326a8a0da360" title="Return status for SDK functions. ">EpidStatus</a></dd></dl> 212<dl class="retval"><dt>Return values</dt><dd> 213 <table class="retval"> 214 <tr><td class="paramname"><a class="el" href="group___error_codes.html#ggafdb27c77c2c4b32c807e326a8a0da360ab45ad60085d03c03ea30b40a0519897e" title="Signature is valid. ">kEpidSigValid</a></td><td><a class="el" href="struct_ecdsa_signature.html" title="ECDSA Signature using NIST 256-bit curve secp256r1. ">EcdsaSignature</a> is valid for the given buffer. </td></tr> 215 <tr><td class="paramname"><a class="el" href="group___error_codes.html#ggafdb27c77c2c4b32c807e326a8a0da360aeedd19b8a1cbdecf963f90b4860e02b8" title="Signature is invalid. ">kEpidSigInvalid</a></td><td><a class="el" href="struct_ecdsa_signature.html" title="ECDSA Signature using NIST 256-bit curve secp256r1. ">EcdsaSignature</a> is invalid for the given buffer.</td></tr> 216 </table> 217 </dd> 218</dl> 219<dl class="section see"><dt>See also</dt><dd><a class="el" href="group___ecdsa_primitives.html#gaef0e8a31e830fe9285b43a0969e6611a" title="Creates ECDSA signature of buffer. ">EcdsaSignBuffer</a> </dd></dl> 220 221</div> 222</div> 223</div><!-- contents --> 224</div><!-- doc-content --> 225<!-- HTML footer for doxygen 1.8.10--> 226<!-- start footer part --> 227<div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> 228 <ul> 229 <li class="footer"> 230 © 2016-2017 Intel Corporation 231 </li> 232 </ul> 233</div> 234</body> 235</html> 236