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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" > ntru_rnd.c< / div > < / div >
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< a href = "ntru__rnd_8c.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) 2014 FH Bielefeld< / span > < / div >
< div class = "line" > < a name = "l00003" > < / a > < span class = "lineno" > 3< / span >   < span class = "comment" > *< / span > < / div >
< div class = "line" > < a name = "l00004" > < / a > < span class = "lineno" > 4< / span >   < span class = "comment" > * This file is part of a FH Bielefeld project.< / span > < / div >
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< div class = "line" > < a name = "l00006" > < / a > < span class = "lineno" > 6< / span >   < span class = "comment" > * This library is free software; you can redistribute it and/or< / span > < / div >
< div class = "line" > < a name = "l00007" > < / a > < span class = "lineno" > 7< / span >   < span class = "comment" > * modify it under the terms of the GNU Lesser General Public< / span > < / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < span class = "comment" > * License as published by the Free Software Foundation; either< / span > < / div >
< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   < span class = "comment" > * version 2.1 of the License, or (at your option) any later version.< / span > < / div >
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< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < span class = "comment" > * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,< / span > < / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   < span class = "comment" > * MA 02110-1301 USA< / span > < / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < span class = "comment" > */< / span > < / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   < span class = "preprocessor" > #include " math.h" < / span > < / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   < span class = "preprocessor" > #include " < a class = "code" href = "ntru__err_8h.html" > ntru_err.h< / a > " < / span > < / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   < span class = "preprocessor" > #include " < a class = "code" href = "ntru__params_8h.html" > ntru_params.h< / a > " < / span > < / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   < span class = "preprocessor" > #include " < a class = "code" href = "ntru__poly_8h.html" > ntru_poly.h< / a > " < / span > < / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   < / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   < span class = "preprocessor" > #include < fmpz_poly.h> < / span > < / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   < span class = "preprocessor" > #include < fcntl.h> < / span > < / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   < span class = "preprocessor" > #include < stdlib.h> < / span > < / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   < span class = "preprocessor" > #include < unistd.h> < / span > < / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   < / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   < / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   < span class = "comment" > /*------------------------------------------------------------------------*/< / span > < / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   < / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   < span class = "keywordtype" > int< / span > < / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > < a class = "line" href = "rnd_8h.html#ad85ebfb1cb4b4942942213b750812cf0" > 42< / a > < / span >   < a class = "code" href = "ntru__rnd_8c.html#ad85ebfb1cb4b4942942213b750812cf0" > get_rnd_int< / a > (< span class = "keywordtype" > void< / span > )< / 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 = "keywordtype" > int< / span > rnd_data = open(< span class = "stringliteral" > " /dev/random" < / span > , O_RDONLY);< / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   < span class = "keywordtype" > int< / span > rnd_int;< / div >
< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > 46< / span >   < span class = "keywordtype" > size_t< / span > rnd_len = 0;< / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   < / div >
< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   < span class = "keywordflow" > while< / span > (rnd_len < < span class = "keyword" > sizeof< / span > (rnd_int)) {< / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   ssize_t result = read(rnd_data, ((< span class = "keywordtype" > char< / span > *)& rnd_int) + rnd_len,< / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   < span class = "keyword" > sizeof< / span > (rnd_int) - rnd_len);< / 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 >   < span class = "keywordflow" > if< / span > (result < 0)< / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   < a class = "code" href = "ntru__err_8h.html#ab0f71521e9bc99beab8ece52bb00341a" > NTRU_ABORT< / a > (< span class = "stringliteral" > " Unable to read /dev/random!\n" < / span > );< / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   < / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   rnd_len += result;< / div >
< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   }< / 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 >   close(rnd_data);< / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   < / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   < span class = "keywordflow" > return< / span > rnd_int;< / 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 >   < / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   < span class = "keywordtype" > int< / span > < / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > < a class = "line" href = "rnd_8h.html#a99e4820cab7157eb1e16109e21dac81f" > 66< / a > < / span >   < a class = "code" href = "ntru__rnd_8c.html#a99e4820cab7157eb1e16109e21dac81f" > get_urnd_int< / a > (< span class = "keywordtype" > void< / span > )< / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   {< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   < span class = "keywordtype" > int< / span > rnd_data = open(< span class = "stringliteral" > " /dev/urandom" < / span > , O_RDONLY);< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < span class = "keywordtype" > int< / span > rnd_int;< / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / span >   ssize_t result;< / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   < / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   result = read(rnd_data, ((< span class = "keywordtype" > char< / span > *)& rnd_int),< / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   < span class = "keyword" > sizeof< / span > (rnd_int));< / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   < / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   < span class = "keywordflow" > if< / span > (result < 0)< / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   < a class = "code" href = "ntru__err_8h.html#ab0f71521e9bc99beab8ece52bb00341a" > NTRU_ABORT< / a > (< span class = "stringliteral" > " Unable to read /dev/urandom!\n" < / span > );< / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   < / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   close(rnd_data);< / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   < / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   < span class = "keywordflow" > return< / span > rnd_int;< / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   }< / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   < / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   < span class = "comment" > /*------------------------------------------------------------------------*/< / span > < / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   < / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   < span class = "keywordtype" > void< / span > < / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > < a class = "line" href = "rnd_8h.html#a916a55c609c172ae4e48896032b36e47" > 86< / a > < / span >   < a class = "code" href = "ntru__rnd_8c.html#a916a55c609c172ae4e48896032b36e47" > ntru_get_rnd_tern_poly_num< / a > (fmpz_poly_t poly,< / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   < span class = "keyword" > const< / span > < a class = "code" href = "structntru__params.html" > ntru_params< / a > *params,< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   uint32_t num_ones,< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   uint32_t num_neg_ones,< / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   < span class = "keywordtype" > int< / span > (*rnd_int)(< span class = "keywordtype" > void< / span > ))< / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   {< / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   < span class = "keywordflow" > if< / span > (!poly || ! params)< / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   < a class = "code" href = "ntru__err_8h.html#a5d4dd1c1539c408c0dcd915750e8f224" > NTRU_ABORT_DEBUG< / a > (< span class = "stringliteral" > " unexpected NULL parameters" < / 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" > 95< / span >   fmpz_poly_zero(poly);< / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   < / div >
< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   < span class = "keywordflow" > while< / span > (num_ones != 0 || num_neg_ones != 0) {< / div >
< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > 98< / span >   int32_t pos = rnd_int() % params-> < a class = "code" href = "structntru__params.html#afb8425ee3db2b917b3c4e8d9b75bd3ff" > N< / a > ;< / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   < / div >
< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   < span class = "keywordflow" > if< / span > (!< a class = "code" href = "ntru__poly_8c.html#aaaac83ec72414aa208832442657c3520" > fmpz_cmp_si_n< / a > (fmpz_poly_get_coeff_ptr(poly, pos), 0)) {< / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   < span class = "keywordflow" > if< / span > (num_ones > 0) {< / div >
< div class = "line" > < a name = "l00102" > < / a > < span class = "lineno" > 102< / span >   fmpz_poly_set_coeff_si(poly, pos, 1);< / div >
< div class = "line" > < a name = "l00103" > < / a > < span class = "lineno" > 103< / span >   num_ones--;< / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (num_neg_ones > 0) {< / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   fmpz_poly_set_coeff_si(poly, pos, -1);< / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   num_neg_ones--;< / div >
< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > 107< / span >   }< / 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 >   }< / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   < / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   < span class = "comment" > /*------------------------------------------------------------------------*/< / span > < / div >
< div class = "ttc" id = "structntru__params_html_afb8425ee3db2b917b3c4e8d9b75bd3ff" > < div class = "ttname" > < a href = "structntru__params.html#afb8425ee3db2b917b3c4e8d9b75bd3ff" > ntru_params::N< / a > < / div > < div class = "ttdeci" > uint32_t N< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "ntru__params_8h_source.html#l00048" > ntru_params.h:48< / a > < / div > < / div >
< div class = "ttc" id = "ntru__rnd_8c_html_a99e4820cab7157eb1e16109e21dac81f" > < div class = "ttname" > < a href = "ntru__rnd_8c.html#a99e4820cab7157eb1e16109e21dac81f" > get_urnd_int< / a > < / div > < div class = "ttdeci" > int get_urnd_int(void)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "ntru__rnd_8c_source.html#l00066" > ntru_rnd.c:66< / a > < / div > < / div >
< div class = "ttc" id = "ntru__err_8h_html_a5d4dd1c1539c408c0dcd915750e8f224" > < div class = "ttname" > < a href = "ntru__err_8h.html#a5d4dd1c1539c408c0dcd915750e8f224" > NTRU_ABORT_DEBUG< / a > < / div > < div class = "ttdeci" > #define NTRU_ABORT_DEBUG(...)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "ntru__err_8h_source.html#l00039" > ntru_err.h:39< / a > < / div > < / div >
< div class = "ttc" id = "ntru__rnd_8c_html_ad85ebfb1cb4b4942942213b750812cf0" > < div class = "ttname" > < a href = "ntru__rnd_8c.html#ad85ebfb1cb4b4942942213b750812cf0" > get_rnd_int< / a > < / div > < div class = "ttdeci" > int get_rnd_int(void)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "ntru__rnd_8c_source.html#l00042" > ntru_rnd.c:42< / a > < / div > < / div >
< div class = "ttc" id = "structntru__params_html" > < div class = "ttname" > < a href = "structntru__params.html" > ntru_params< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "ntru__params_8h_source.html#l00043" > ntru_params.h:43< / a > < / div > < / div >
< div class = "ttc" id = "ntru__params_8h_html" > < div class = "ttname" > < a href = "ntru__params_8h.html" > ntru_params.h< / a > < / div > < div class = "ttdoc" > NTRU parameters. < / div > < / div >
< div class = "ttc" id = "ntru__rnd_8c_html_a916a55c609c172ae4e48896032b36e47" > < div class = "ttname" > < a href = "ntru__rnd_8c.html#a916a55c609c172ae4e48896032b36e47" > ntru_get_rnd_tern_poly_num< / a > < / div > < div class = "ttdeci" > void ntru_get_rnd_tern_poly_num(fmpz_poly_t poly, const ntru_params *params, uint32_t num_ones, uint32_t num_neg_ones, int(*rnd_int)(void))< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "ntru__rnd_8c_source.html#l00086" > ntru_rnd.c:86< / a > < / div > < / div >
< div class = "ttc" id = "ntru__err_8h_html" > < div class = "ttname" > < a href = "ntru__err_8h.html" > ntru_err.h< / a > < / div > < div class = "ttdoc" > error handling < / div > < / div >
< div class = "ttc" id = "ntru__poly_8c_html_aaaac83ec72414aa208832442657c3520" > < div class = "ttname" > < a href = "ntru__poly_8c.html#aaaac83ec72414aa208832442657c3520" > fmpz_cmp_si_n< / a > < / div > < div class = "ttdeci" > int fmpz_cmp_si_n(const fmpz_t f, slong g)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "ntru__poly_8c_source.html#l00093" > ntru_poly.c:93< / a > < / div > < / div >
< div class = "ttc" id = "ntru__poly_8h_html" > < div class = "ttname" > < a href = "ntru__poly_8h.html" > ntru_poly.h< / a > < / div > < div class = "ttdoc" > header for ntru_poly.c < / div > < / div >
< div class = "ttc" id = "ntru__err_8h_html_ab0f71521e9bc99beab8ece52bb00341a" > < div class = "ttname" > < a href = "ntru__err_8h.html#ab0f71521e9bc99beab8ece52bb00341a" > NTRU_ABORT< / a > < / div > < div class = "ttdeci" > #define NTRU_ABORT(...)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "ntru__err_8h_source.html#l00033" > ntru_err.h:33< / a > < / div > < / div >
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