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<title>post quantum cryptography: /home/travis/build/hasufell/pqc/src/ntru_keypair.c Source File</title>
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<div id="projectname">post quantum cryptography
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<div id="projectbrief">Highly optimized implementation of the NTRUEncrypt algorithm</div>
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<div class="title">/home/travis/build/hasufell/pqc/src/ntru_keypair.c</div> </div>
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<a href="ntru__keypair_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
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<a name="l00002"></a>00002 <span class="comment"> * Copyright (C) 2014 FH Bielefeld</span>
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<a name="l00003"></a>00003 <span class="comment"> *</span>
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<a name="l00004"></a>00004 <span class="comment"> * This file is part of a FH Bielefeld project.</span>
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<a name="l00005"></a>00005 <span class="comment"> *</span>
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<a name="l00006"></a>00006 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
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<a name="l00007"></a>00007 <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span>
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<a name="l00008"></a>00008 <span class="comment"> * License as published by the Free Software Foundation; either</span>
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<a name="l00009"></a>00009 <span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span>
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<a name="l00010"></a>00010 <span class="comment"> *</span>
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<a name="l00011"></a>00011 <span class="comment"> * This library is distributed in the hope that it will be useful,</span>
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<a name="l00012"></a>00012 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
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<a name="l00013"></a>00013 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
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<a name="l00014"></a>00014 <span class="comment"> * Lesser General Public License for more details.</span>
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<a name="l00015"></a>00015 <span class="comment"> *</span>
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<a name="l00016"></a>00016 <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span>
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<a name="l00017"></a>00017 <span class="comment"> * License along with this library; if not, write to the Free Software</span>
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<a name="l00018"></a>00018 <span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,</span>
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<a name="l00019"></a>00019 <span class="comment"> * MA 02110-1301 USA</span>
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<a name="l00020"></a>00020 <span class="comment"> */</span>
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<a name="l00021"></a>00021
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<a name="l00029"></a>00029 <span class="preprocessor">#include "<a class="code" href="ntru__ascii__poly_8h.html" title="header for ntru_ascii_poly.c">ntru_ascii_poly.h</a>"</span>
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<a name="l00030"></a>00030 <span class="preprocessor">#include "<a class="code" href="ntru__file_8h.html" title="header for ntru_file.c">ntru_file.h</a>"</span>
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<a name="l00031"></a>00031 <span class="preprocessor">#include "<a class="code" href="ntru__keypair_8h.html" title="header for ntru_keypair.c">ntru_keypair.h</a>"</span>
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<a name="l00032"></a>00032 <span class="preprocessor">#include "<a class="code" href="ntru__params_8h.html" title="NTRU parameters.">ntru_params.h</a>"</span>
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<a name="l00033"></a>00033 <span class="preprocessor">#include "<a class="code" href="ntru__poly_8h.html" title="header for ntru_poly.c">ntru_poly.h</a>"</span>
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<a name="l00034"></a>00034 <span class="preprocessor">#include "<a class="code" href="ntru__poly__ascii_8h.html" title="header for ntru_poly_ascii.c">ntru_poly_ascii.h</a>"</span>
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<a name="l00035"></a>00035 <span class="preprocessor">#include "<a class="code" href="ntru__string_8h.html" title="header for ntru_string.c">ntru_string.h</a>"</span>
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<a name="l00036"></a>00036
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<a name="l00037"></a>00037 <span class="preprocessor">#include <fmpz_poly.h></span>
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<a name="l00038"></a>00038 <span class="preprocessor">#include <fmpz.h></span>
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<a name="l00039"></a>00039
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<a name="l00040"></a>00040 <span class="preprocessor">#include <stdbool.h></span>
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<a name="l00041"></a>00041 <span class="preprocessor">#include <string.h></span>
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<a name="l00042"></a>00042
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<a name="l00043"></a>00043
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<a name="l00044"></a>00044 <span class="comment">/*------------------------------------------------------------------------*/</span>
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<a name="l00045"></a>00045
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<a name="l00046"></a>00046 <span class="keywordtype">bool</span>
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<a name="l00047"></a><a class="code" href="keypair_8h.html#a6873d41211a92c4f6b0074ef34ae1743">00047</a> <a class="code" href="ntru__keypair_8c.html#a6873d41211a92c4f6b0074ef34ae1743">ntru_create_keypair</a>(
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<a name="l00048"></a>00048 fmpz_poly_t f,
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<a name="l00049"></a>00049 fmpz_poly_t g,
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<a name="l00050"></a>00050 <a class="code" href="structkeypair.html">keypair</a> *pair,
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<a name="l00051"></a>00051 <a class="code" href="structntru__params.html">ntru_params</a> *params)
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<a name="l00052"></a>00052 {
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<a name="l00053"></a>00053 <span class="keywordtype">bool</span> retval = <span class="keyword">false</span>;
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<a name="l00054"></a>00054 fmpz_poly_t Fq,
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<a name="l00055"></a>00055 Fp,
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<a name="l00056"></a>00056 pub;
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<a name="l00057"></a>00057
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<a name="l00058"></a>00058 <span class="keywordflow">if</span> (!f || !g || !params)
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<a name="l00059"></a>00059 <span class="keywordflow">goto</span> _return;
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<a name="l00060"></a>00060
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<a name="l00061"></a>00061 fmpz_poly_init(Fq);
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<a name="l00062"></a>00062 fmpz_poly_init(Fp);
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<a name="l00063"></a>00063 fmpz_poly_init(pub);
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<a name="l00064"></a>00064
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<a name="l00065"></a>00065 <span class="keywordflow">if</span> (!<a class="code" href="ntru__poly_8c.html#ace66beb516186e52f9b5b1ed8a397849">poly_inverse_poly_q</a>(f, Fq, params))
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<a name="l00066"></a>00066 <span class="keywordflow">goto</span> _cleanup;
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<a name="l00067"></a>00067
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<a name="l00068"></a>00068 <span class="keywordflow">if</span> (!<a class="code" href="ntru__poly_8c.html#ae77b2014df42e5ed612206d5930ac608">poly_inverse_poly_p</a>(f, Fp, params))
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<a name="l00069"></a>00069 <span class="keywordflow">goto</span> _cleanup;
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<a name="l00070"></a>00070
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<a name="l00071"></a>00071 <a class="code" href="ntru__poly_8c.html#ae96f479ddd97af709a0ed50817fd3fb3">poly_starmultiply</a>(Fq, g, pub, params, params-><a class="code" href="structntru__params.html#a29680750bda49dc93e61a752b2f2a0f7">q</a>);
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<a name="l00072"></a>00072 fmpz_poly_scalar_mul_ui(pub, pub, params-><a class="code" href="structntru__params.html#a41b368825e1eb126604e13e8f549ec8f">p</a>);
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<a name="l00073"></a>00073 <a class="code" href="ntru__poly_8c.html#ae7d0d8364dba689df3fb4904610634cc">fmpz_poly_mod_unsigned</a>(pub, params-><a class="code" href="structntru__params.html#a29680750bda49dc93e61a752b2f2a0f7">q</a>);
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<a name="l00074"></a>00074
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<a name="l00075"></a>00075 fmpz_poly_init(pair-><a class="code" href="structkeypair.html#a9e9805ad001216da53f2c57accb288e1">priv</a>);
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<a name="l00076"></a>00076 fmpz_poly_init(pair-><a class="code" href="structkeypair.html#a9e63f1d275b91c9d9716fb4069461799">priv_inv</a>);
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<a name="l00077"></a>00077 fmpz_poly_init(pair-><a class="code" href="structkeypair.html#afa635c70f233d0b7449b4a17513646c4">pub</a>);
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<a name="l00078"></a>00078
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<a name="l00079"></a>00079 fmpz_poly_set(pair-><a class="code" href="structkeypair.html#a9e9805ad001216da53f2c57accb288e1">priv</a>, f);
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<a name="l00080"></a>00080 fmpz_poly_set(pair-><a class="code" href="structkeypair.html#a9e63f1d275b91c9d9716fb4069461799">priv_inv</a>, Fp);
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<a name="l00081"></a>00081 fmpz_poly_set(pair-><a class="code" href="structkeypair.html#afa635c70f233d0b7449b4a17513646c4">pub</a>, pub);
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<a name="l00082"></a>00082
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<a name="l00083"></a>00083 retval = <span class="keyword">true</span>;
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<a name="l00084"></a>00084
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<a name="l00085"></a>00085 _cleanup:
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<a name="l00086"></a>00086 fmpz_poly_clear(Fq);
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<a name="l00087"></a>00087 fmpz_poly_clear(Fp);
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<a name="l00088"></a>00088 fmpz_poly_clear(pub);
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<a name="l00089"></a>00089 _return:
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<a name="l00090"></a>00090 <span class="keywordflow">return</span> retval;
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<a name="l00091"></a>00091 }
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<a name="l00092"></a>00092
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<a name="l00093"></a>00093 <span class="comment">/*------------------------------------------------------------------------*/</span>
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<a name="l00094"></a>00094
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<a name="l00095"></a>00095 <span class="keywordtype">void</span>
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<a name="l00096"></a><a class="code" href="keypair_8h.html#a41741ed660cb806c47335f66055e1bdd">00096</a> <a class="code" href="ntru__keypair_8c.html#a41741ed660cb806c47335f66055e1bdd">export_public_key</a>(<span class="keywordtype">char</span> <span class="keyword">const</span> * <span class="keyword">const</span> filename,
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<a name="l00097"></a>00097 fmpz_poly_t pub,
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<a name="l00098"></a>00098 <a class="code" href="structntru__params.html">ntru_params</a> *params)
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<a name="l00099"></a>00099 {
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||
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<a name="l00100"></a>00100 <span class="keywordtype">string</span> *pub_string;
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<a name="l00101"></a>00101
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||
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<a name="l00102"></a>00102 pub_string = <a class="code" href="ntru__poly__ascii_8c.html#a4ba0179e3ae0d5e721ff8429a8265e80">poly_to_base64</a>(pub, params);
|
||
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<a name="l00103"></a>00103 <a class="code" href="ntru__file_8c.html#a1f8eef5ea12c77ed2491d96864eb0d43">write_file</a>(pub_string, filename);
|
||
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<a name="l00104"></a>00104
|
||
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<a name="l00105"></a>00105 <a class="code" href="ntru__string_8c.html#ac1b5f66fbbbdfc7901357ddcfec52e5a">string_delete</a>(pub_string);
|
||
|
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<a name="l00106"></a>00106 }
|
||
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<a name="l00107"></a>00107
|
||
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<a name="l00108"></a>00108 <span class="comment">/*------------------------------------------------------------------------*/</span>
|
||
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<a name="l00109"></a>00109
|
||
|
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<a name="l00110"></a>00110 <span class="keywordtype">void</span>
|
||
|
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<a name="l00111"></a><a class="code" href="keypair_8h.html#afa29f14a14486d3f6b979ee900d7e738">00111</a> <a class="code" href="ntru__keypair_8c.html#afa29f14a14486d3f6b979ee900d7e738">export_priv_key</a>(<span class="keywordtype">char</span> <span class="keyword">const</span> * <span class="keyword">const</span> filename,
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||
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<a name="l00112"></a>00112 fmpz_poly_t priv,
|
||
|
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<a name="l00113"></a>00113 <a class="code" href="structntru__params.html">ntru_params</a> *params)
|
||
|
|
<a name="l00114"></a>00114 {
|
||
|
|
<a name="l00115"></a>00115 <span class="keywordtype">string</span> *priv_string;
|
||
|
|
<a name="l00116"></a>00116 fmpz_poly_t priv_u;
|
||
|
|
<a name="l00117"></a>00117
|
||
|
|
<a name="l00118"></a>00118 fmpz_poly_init(priv_u);
|
||
|
|
<a name="l00119"></a>00119 fmpz_poly_set(priv_u, priv);
|
||
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|
<a name="l00120"></a>00120 <a class="code" href="ntru__poly_8c.html#ae7d0d8364dba689df3fb4904610634cc">fmpz_poly_mod_unsigned</a>(priv_u, params-><a class="code" href="structntru__params.html#a41b368825e1eb126604e13e8f549ec8f">p</a>);
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||
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<a name="l00121"></a>00121
|
||
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|
<a name="l00122"></a>00122 priv_string = <a class="code" href="ntru__poly__ascii_8c.html#a4ba0179e3ae0d5e721ff8429a8265e80">poly_to_base64</a>(priv_u, params);
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||
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<a name="l00123"></a>00123 <a class="code" href="ntru__file_8c.html#a1f8eef5ea12c77ed2491d96864eb0d43">write_file</a>(priv_string, filename);
|
||
|
|
<a name="l00124"></a>00124
|
||
|
|
<a name="l00125"></a>00125 fmpz_poly_clear(priv_u);
|
||
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|
<a name="l00126"></a>00126 <a class="code" href="ntru__string_8c.html#ac1b5f66fbbbdfc7901357ddcfec52e5a">string_delete</a>(priv_string);
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||
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<a name="l00127"></a>00127 }
|
||
|
|
<a name="l00128"></a>00128
|
||
|
|
<a name="l00129"></a>00129 <span class="comment">/*------------------------------------------------------------------------*/</span>
|
||
|
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<a name="l00130"></a>00130
|
||
|
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<a name="l00131"></a>00131 <span class="keywordtype">void</span>
|
||
|
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<a name="l00132"></a><a class="code" href="keypair_8h.html#a4e2c6da04c55e8c1b6c447f4cc9f1d6f">00132</a> <a class="code" href="ntru__keypair_8c.html#a4e2c6da04c55e8c1b6c447f4cc9f1d6f">import_public_key</a>(<span class="keywordtype">char</span> <span class="keyword">const</span> * <span class="keyword">const</span> filename,
|
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<a name="l00133"></a>00133 fmpz_poly_t pub,
|
||
|
|
<a name="l00134"></a>00134 <a class="code" href="structntru__params.html">ntru_params</a> *params)
|
||
|
|
<a name="l00135"></a>00135 {
|
||
|
|
<a name="l00136"></a>00136 <span class="keywordtype">string</span> *pub_string;
|
||
|
|
<a name="l00137"></a>00137 fmpz_poly_t **imported;
|
||
|
|
<a name="l00138"></a>00138
|
||
|
|
<a name="l00139"></a>00139 pub_string = <a class="code" href="ntru__file_8c.html#a348c2a56837571f410d44631abc09dc4">read_file</a>(filename);
|
||
|
|
<a name="l00140"></a>00140 imported = <a class="code" href="ntru__ascii__poly_8c.html#a8460cd27ad4562f560bb304609a3e06d">base64_to_poly_arr</a>(pub_string, params);
|
||
|
|
<a name="l00141"></a>00141
|
||
|
|
<a name="l00142"></a>00142 <span class="comment">/* if the array exceeds one element, then something</span>
|
||
|
|
<a name="l00143"></a>00143 <span class="comment"> * went horribly wrong */</span>
|
||
|
|
<a name="l00144"></a>00144 <span class="keywordflow">if</span> (*imported[1])
|
||
|
|
<a name="l00145"></a>00145 <a class="code" href="ntru__err_8h.html#a5d4dd1c1539c408c0dcd915750e8f224">NTRU_ABORT_DEBUG</a>(<span class="stringliteral">"Failed importing public key!"</span>);
|
||
|
|
<a name="l00146"></a>00146
|
||
|
|
<a name="l00147"></a>00147 fmpz_poly_set(pub, **imported);
|
||
|
|
<a name="l00148"></a>00148
|
||
|
|
<a name="l00149"></a>00149 <a class="code" href="ntru__string_8c.html#ac1b5f66fbbbdfc7901357ddcfec52e5a">string_delete</a>(pub_string);
|
||
|
|
<a name="l00150"></a>00150 <a class="code" href="ntru__poly_8c.html#a3f53c63383ff301b20dcede0783869a7">poly_delete_array</a>(imported);
|
||
|
|
<a name="l00151"></a>00151 free(imported);
|
||
|
|
<a name="l00152"></a>00152 }
|
||
|
|
<a name="l00153"></a>00153
|
||
|
|
<a name="l00154"></a>00154 <span class="comment">/*------------------------------------------------------------------------*/</span>
|
||
|
|
<a name="l00155"></a>00155
|
||
|
|
<a name="l00156"></a>00156 <span class="keywordtype">void</span>
|
||
|
|
<a name="l00157"></a><a class="code" href="keypair_8h.html#a1f917ea6ef5302826c888e5c88e0869e">00157</a> <a class="code" href="ntru__keypair_8c.html#a1f917ea6ef5302826c888e5c88e0869e">import_priv_key</a>(<span class="keywordtype">char</span> <span class="keyword">const</span> * <span class="keyword">const</span> filename,
|
||
|
|
<a name="l00158"></a>00158 fmpz_poly_t priv,
|
||
|
|
<a name="l00159"></a>00159 fmpz_poly_t priv_inv,
|
||
|
|
<a name="l00160"></a>00160 <a class="code" href="structntru__params.html">ntru_params</a> *params)
|
||
|
|
<a name="l00161"></a>00161 {
|
||
|
|
<a name="l00162"></a>00162 <span class="keywordtype">string</span> *pub_string;
|
||
|
|
<a name="l00163"></a>00163 fmpz_poly_t **imported,
|
||
|
|
<a name="l00164"></a>00164 Fp;
|
||
|
|
<a name="l00165"></a>00165
|
||
|
|
<a name="l00166"></a>00166 fmpz_poly_init(Fp);
|
||
|
|
<a name="l00167"></a>00167
|
||
|
|
<a name="l00168"></a>00168 pub_string = <a class="code" href="ntru__file_8c.html#a348c2a56837571f410d44631abc09dc4">read_file</a>(filename);
|
||
|
|
<a name="l00169"></a>00169
|
||
|
|
<a name="l00170"></a>00170 imported = <a class="code" href="ntru__ascii__poly_8c.html#a8460cd27ad4562f560bb304609a3e06d">base64_to_poly_arr</a>(pub_string, params);
|
||
|
|
<a name="l00171"></a>00171 <a class="code" href="ntru__poly_8c.html#a7c4f5e96355518dc97a23da8f34b661a">fmpz_poly_mod</a>(**imported, params-><a class="code" href="structntru__params.html#a41b368825e1eb126604e13e8f549ec8f">p</a>);
|
||
|
|
<a name="l00172"></a>00172
|
||
|
|
<a name="l00173"></a>00173 <span class="comment">/* if the array exceeds one element, then something</span>
|
||
|
|
<a name="l00174"></a>00174 <span class="comment"> * went horribly wrong */</span>
|
||
|
|
<a name="l00175"></a>00175 <span class="keywordflow">if</span> (*imported[1])
|
||
|
|
<a name="l00176"></a>00176 <a class="code" href="ntru__err_8h.html#a5d4dd1c1539c408c0dcd915750e8f224">NTRU_ABORT_DEBUG</a>(<span class="stringliteral">"Failed importing private key!"</span>);
|
||
|
|
<a name="l00177"></a>00177
|
||
|
|
<a name="l00178"></a>00178 fmpz_poly_set(priv, **imported);
|
||
|
|
<a name="l00179"></a>00179
|
||
|
|
<a name="l00180"></a>00180 <span class="keywordflow">if</span> (!<a class="code" href="ntru__poly_8c.html#ae77b2014df42e5ed612206d5930ac608">poly_inverse_poly_p</a>(priv, Fp, params))
|
||
|
|
<a name="l00181"></a>00181 <span class="keywordflow">goto</span> cleanup;
|
||
|
|
<a name="l00182"></a>00182
|
||
|
|
<a name="l00183"></a>00183 <a class="code" href="ntru__poly_8c.html#a7c4f5e96355518dc97a23da8f34b661a">fmpz_poly_mod</a>(Fp, params-><a class="code" href="structntru__params.html#a41b368825e1eb126604e13e8f549ec8f">p</a>);
|
||
|
|
<a name="l00184"></a>00184
|
||
|
|
<a name="l00185"></a>00185 fmpz_poly_set(priv_inv, Fp);
|
||
|
|
<a name="l00186"></a>00186 fmpz_poly_clear(Fp);
|
||
|
|
<a name="l00187"></a>00187
|
||
|
|
<a name="l00188"></a>00188 cleanup:
|
||
|
|
<a name="l00189"></a>00189 <a class="code" href="ntru__string_8c.html#ac1b5f66fbbbdfc7901357ddcfec52e5a">string_delete</a>(pub_string);
|
||
|
|
<a name="l00190"></a>00190 <a class="code" href="ntru__poly_8c.html#a3f53c63383ff301b20dcede0783869a7">poly_delete_array</a>(imported);
|
||
|
|
<a name="l00191"></a>00191 free(imported);
|
||
|
|
<a name="l00192"></a>00192 }
|
||
|
|
<a name="l00193"></a>00193
|
||
|
|
<a name="l00194"></a>00194 <span class="comment">/*------------------------------------------------------------------------*/</span>
|
||
|
|
<a name="l00195"></a>00195
|
||
|
|
<a name="l00196"></a>00196 <span class="keywordtype">void</span>
|
||
|
|
<a name="l00197"></a><a class="code" href="keypair_8h.html#a5279c4990bc22bb9e735fe36372a6786">00197</a> <a class="code" href="ntru__keypair_8c.html#a5279c4990bc22bb9e735fe36372a6786">ntru_delete_keypair</a>(<a class="code" href="structkeypair.html">keypair</a> *pair)
|
||
|
|
<a name="l00198"></a>00198 {
|
||
|
|
<a name="l00199"></a>00199 fmpz_poly_clear(pair-><a class="code" href="structkeypair.html#a9e63f1d275b91c9d9716fb4069461799">priv_inv</a>);
|
||
|
|
<a name="l00200"></a>00200 fmpz_poly_clear(pair-><a class="code" href="structkeypair.html#a9e9805ad001216da53f2c57accb288e1">priv</a>);
|
||
|
|
<a name="l00201"></a>00201 fmpz_poly_clear(pair-><a class="code" href="structkeypair.html#afa635c70f233d0b7449b4a17513646c4">pub</a>);
|
||
|
|
<a name="l00202"></a>00202 }
|
||
|
|
<a name="l00203"></a>00203
|
||
|
|
<a name="l00204"></a>00204 <span class="comment">/*------------------------------------------------------------------------*/</span>
|
||
|
|
</pre></div></div><!-- contents -->
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Generated on Sun Jun 8 2014 21:44:12 for post quantum cryptography by  <a href="http://www.doxygen.org/index.html">
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<img class="footer" src="doxygen.png" alt="doxygen"/>
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</a> 1.7.6.1
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