ca575303bf
travis build: 25 commit: 05b02f5624f2054cdf2e802f63c834162c2fe05b auto-pushed to gh-pages
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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_file.c</div> </div>
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<a href="ntru__file_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__common_8h.html" title="common macros/functions">ntru_common.h</a>"</span>
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<a name="l00030"></a>00030 <span class="preprocessor">#include "<a class="code" href="ntru__err_8h.html" title="error handling">ntru_err.h</a>"</span>
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<a name="l00031"></a>00031 <span class="preprocessor">#include "<a class="code" href="ntru__mem_8h.html" title="header for ntru_mem.c">ntru_mem.h</a>"</span>
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<a name="l00032"></a>00032 <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="l00033"></a>00033
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<a name="l00034"></a>00034 <span class="preprocessor">#include <fcntl.h></span>
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<a name="l00035"></a>00035 <span class="preprocessor">#include <stdbool.h></span>
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<a name="l00036"></a>00036 <span class="preprocessor">#include <stdint.h></span>
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<a name="l00037"></a>00037 <span class="preprocessor">#include <stdio.h></span>
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<a name="l00038"></a>00038 <span class="preprocessor">#include <stdlib.h></span>
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<a name="l00039"></a>00039 <span class="preprocessor">#include <string.h></span>
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<a name="l00040"></a>00040 <span class="preprocessor">#include <sys/stat.h></span>
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<a name="l00041"></a>00041 <span class="preprocessor">#include <sys/types.h></span>
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<a name="l00042"></a>00042 <span class="preprocessor">#include <unistd.h></span>
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<a name="l00043"></a>00043
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<a name="l00044"></a><a class="code" href="ntru__file_8c.html#a15651456278c8f50777dfe104f492951">00044</a> <span class="preprocessor">#define STD_FILE_BUF 4096</span>
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<a name="l00045"></a>00045 <span class="preprocessor"></span>
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<a name="l00046"></a>00046
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<a name="l00047"></a>00047 <span class="comment">/*------------------------------------------------------------------------*/</span>
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<a name="l00048"></a>00048
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<a name="l00049"></a>00049 <span class="keywordtype">string</span> *
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<a name="l00050"></a><a class="code" href="ntru_8h.html#a348c2a56837571f410d44631abc09dc4">00050</a> <a class="code" href="ntru__file_8c.html#a348c2a56837571f410d44631abc09dc4">read_file</a>(<span class="keywordtype">char</span> <span class="keyword">const</span> * <span class="keyword">const</span> filename)
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<a name="l00051"></a>00051 {
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<a name="l00052"></a>00052 <span class="keywordtype">char</span> buf[<a class="code" href="ntru__file_8c.html#a15651456278c8f50777dfe104f492951">STD_FILE_BUF</a>],
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<a name="l00053"></a>00053 *cstring = NULL;
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<a name="l00054"></a>00054 <span class="keywordtype">int</span> fd = 0;
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<a name="l00055"></a>00055 <span class="keywordtype">size_t</span> str_size = 0;
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<a name="l00056"></a>00056 ssize_t n;
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<a name="l00057"></a>00057 <span class="keywordtype">size_t</span> file_length = 0;
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<a name="l00058"></a>00058 <span class="keywordtype">string</span> *result_string;
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<a name="l00059"></a>00059
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<a name="l00060"></a>00060 fd = open(filename, O_RDONLY);
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<a name="l00061"></a>00061 file_length = lseek(fd, 0, SEEK_END) + 1;
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<a name="l00062"></a>00062 lseek(fd, 0, SEEK_SET);
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<a name="l00063"></a>00063
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<a name="l00064"></a>00064 cstring = malloc(<span class="keyword">sizeof</span>(<span class="keywordtype">char</span>) * file_length);
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<a name="l00065"></a>00065
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<a name="l00066"></a>00066 <span class="keywordflow">if</span> (fd != -1) {
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<a name="l00067"></a>00067 <span class="comment">/* read and copy chunks */</span>
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<a name="l00068"></a>00068 <span class="keywordflow">while</span> ((n = read(fd, buf, <a class="code" href="ntru__file_8c.html#a15651456278c8f50777dfe104f492951">STD_FILE_BUF</a>)) != 0) {
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<a name="l00069"></a>00069
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<a name="l00070"></a>00070 <span class="keywordflow">if</span> (n == -1) {
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<a name="l00071"></a>00071 <a class="code" href="ntru__err_8h.html#abcb6d051074ab3a58c5e9764f927753c">NTRU_WARN_DEBUG</a>(<span class="stringliteral">"Failed while reading file descriptor %d"</span>,
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<a name="l00072"></a>00072 fd);
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<a name="l00073"></a>00073 <span class="keywordflow">goto</span> failure_cleanup;
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<a name="l00074"></a>00074 }
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<a name="l00075"></a>00075
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<a name="l00076"></a>00076 str_size += n; <span class="comment">/* count total bytes read */</span>
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<a name="l00077"></a>00077
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<a name="l00078"></a>00078 <span class="comment">/* append buffer to string */</span>
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<a name="l00079"></a>00079 memcpy(cstring + (str_size - n), buf, (<span class="keywordtype">size_t</span>)n);
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<a name="l00080"></a>00080 }
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<a name="l00081"></a>00081 <span class="comment">/* add trailing NULL byte */</span>
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<a name="l00082"></a>00082 cstring[str_size] = <span class="charliteral">'\0'</span>;
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<a name="l00083"></a>00083
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<a name="l00084"></a>00084 <span class="keywordflow">if</span> (close(fd)) {
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<a name="l00085"></a>00085 <a class="code" href="ntru__err_8h.html#abcb6d051074ab3a58c5e9764f927753c">NTRU_WARN_DEBUG</a>(<span class="stringliteral">"Failed to close file descripter %d\n"</span>, fd);
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<a name="l00086"></a>00086 <span class="keywordflow">goto</span> failure_cleanup;
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<a name="l00087"></a>00087 }
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<a name="l00088"></a>00088
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<a name="l00089"></a>00089 result_string = <a class="code" href="ntru__mem_8c.html#a020790bf8b201fde92395cf975c0c691">ntru_malloc</a>(<span class="keyword">sizeof</span>(*result_string));
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<a name="l00090"></a>00090 result_string-><a class="code" href="structstring.html#afd608f62303958cea6f1f7afdec1e282">ptr</a> = cstring;
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<a name="l00091"></a>00091 result_string-><a class="code" href="structstring.html#aa6bcf0353fd5cf2f374a9b1dd0e4a73a">len</a> = str_size;
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<a name="l00092"></a>00092
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<a name="l00093"></a>00093 <span class="keywordflow">return</span> result_string;
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<a name="l00094"></a>00094
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<a name="l00095"></a>00095 } <span class="keywordflow">else</span> {
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<a name="l00096"></a>00096 <span class="keywordflow">return</span> NULL;
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<a name="l00097"></a>00097 }
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<a name="l00098"></a>00098
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<a name="l00099"></a>00099 failure_cleanup:
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<a name="l00100"></a>00100 free(cstring);
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<a name="l00101"></a>00101 <span class="keywordflow">return</span> NULL;
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<a name="l00102"></a>00102 }
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<a name="l00103"></a>00103
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<a name="l00104"></a>00104 <span class="comment">/*------------------------------------------------------------------------*/</span>
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<a name="l00105"></a>00105
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<a name="l00106"></a>00106 <span class="keywordtype">bool</span>
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<a name="l00107"></a><a class="code" href="ntru_8h.html#af2a0fc4dd4109749d8f3100a913cc304">00107</a> <a class="code" href="ntru__file_8c.html#a1f8eef5ea12c77ed2491d96864eb0d43">write_file</a>(<span class="keywordtype">string</span> <span class="keyword">const</span> *wstring, <span class="keywordtype">char</span> <span class="keyword">const</span> * <span class="keyword">const</span> filename)
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<a name="l00108"></a>00108 {
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<a name="l00109"></a>00109 FILE *fp;
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<a name="l00110"></a>00110
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<a name="l00111"></a>00111 fp = fopen(filename, <span class="stringliteral">"w"</span>);
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<a name="l00112"></a>00112
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<a name="l00113"></a>00113 <span class="keywordflow">if</span> (!fp) {
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<a name="l00114"></a>00114 <a class="code" href="ntru__err_8h.html#abcb6d051074ab3a58c5e9764f927753c">NTRU_WARN_DEBUG</a>(<span class="stringliteral">"Failed while creating file\n"</span>);
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<a name="l00115"></a>00115 <span class="keywordflow">return</span> <span class="keyword">false</span>;
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<a name="l00116"></a>00116 }
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<a name="l00117"></a>00117
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<a name="l00118"></a>00118 <span class="keywordflow">for</span> (uint32_t i = 0; i < wstring-><a class="code" href="structstring.html#aa6bcf0353fd5cf2f374a9b1dd0e4a73a">len</a>; i++)
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<a name="l00119"></a>00119 fprintf(fp, <span class="stringliteral">"%c"</span>, wstring-><a class="code" href="structstring.html#afd608f62303958cea6f1f7afdec1e282">ptr</a>[i]);
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<a name="l00120"></a>00120
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<a name="l00121"></a>00121 <span class="keywordflow">if</span> (fclose(fp)) {
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<a name="l00122"></a>00122 <a class="code" href="ntru__err_8h.html#abcb6d051074ab3a58c5e9764f927753c">NTRU_WARN_DEBUG</a>(<span class="stringliteral">"Failed to close file descripter\n"</span>);
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<a name="l00123"></a>00123 <span class="keywordflow">return</span> <span class="keyword">false</span>;
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<a name="l00124"></a>00124 }
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<a name="l00125"></a>00125
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<a name="l00126"></a>00126 <span class="keywordflow">return</span> <span class="keyword">true</span>;
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<a name="l00127"></a>00127 }
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<a name="l00128"></a>00128
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<a name="l00129"></a>00129 <span class="comment">/*------------------------------------------------------------------------*/</span>
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</pre></div></div><!-- contents -->
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