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<h1>digestauth.c</h1> </div>
</div>
<div class="contents">
<a href="../../d3/d5c/digestauth_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>
<a name="l00002"></a>00002 <span class="comment"> This file is part of libmicrohttpd</span>
<a name="l00003"></a>00003 <span class="comment"> (C) 2010 Daniel Pittman and Christian Grothoff</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> This library is free software; you can redistribute it and/or</span>
<a name="l00006"></a>00006 <span class="comment"> modify it under the terms of the GNU Lesser General Public</span>
<a name="l00007"></a>00007 <span class="comment"> License as published by the Free Software Foundation; either</span>
<a name="l00008"></a>00008 <span class="comment"> version 2.1 of the License, or (at your option) any later version.</span>
<a name="l00009"></a>00009 <span class="comment"></span>
<a name="l00010"></a>00010 <span class="comment"> This library is distributed in the hope that it will be useful,</span>
<a name="l00011"></a>00011 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00012"></a>00012 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00013"></a>00013 <span class="comment"> Lesser General Public License for more details.</span>
<a name="l00014"></a>00014 <span class="comment"></span>
<a name="l00015"></a>00015 <span class="comment"> You should have received a copy of the GNU Lesser General Public</span>
<a name="l00016"></a>00016 <span class="comment"> License along with this library; if not, write to the Free Software</span>
<a name="l00017"></a>00017 <span class="comment"> Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span>
<a name="l00018"></a>00018 <span class="comment">*/</span>
<a name="l00019"></a>00019
<a name="l00027"></a>00027 <span class="preprocessor">#include "<a class="code" href="../../de/d03/platform_8h.html" title="platform-specific includes for libmicrohttpd">platform.h</a>"</span>
<a name="l00028"></a>00028 <span class="preprocessor">#include "<a class="code" href="../../db/dde/internal_8h.html" title="internal shared structures">internal.h</a>"</span>
<a name="l00029"></a>00029 <span class="preprocessor">#include "<a class="code" href="../../da/db0/md5_8h.html">md5.h</a>"</span>
<a name="l00030"></a>00030 <span class="preprocessor">#include "<a class="code" href="../../d2/d6f/base64_8h.html">base64.h</a>"</span>
<a name="l00031"></a>00031
<a name="l00032"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#a2f5d5a398fdba2a14d581ad8e2bdde34">00032</a> <span class="preprocessor">#define HASH_MD5_HEX_LEN (2 * MD5_DIGEST_SIZE)</span>
<a name="l00033"></a>00033 <span class="preprocessor"></span>
<a name="l00037"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#aa16efc9e8c49f37521999e16d47818dc">00037</a> <span class="preprocessor">#define _BASE "Digest "</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span>
<a name="l00042"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#ac9ae7f90d5195e72c134de9d658dcbed">00042</a> <span class="preprocessor">#define _BASIC_BASE "Basic "</span>
<a name="l00043"></a>00043 <span class="preprocessor"></span>
<a name="l00047"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#ac32ea00c03c9a9afd1ffc9e1627a8506">00047</a> <span class="preprocessor">#define MAX_USERNAME_LENGTH 128</span>
<a name="l00048"></a>00048 <span class="preprocessor"></span>
<a name="l00052"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#a4cd636e6e8acb7f77b7c945a4e2f1b29">00052</a> <span class="preprocessor">#define MAX_REALM_LENGTH 256</span>
<a name="l00053"></a>00053 <span class="preprocessor"></span>
<a name="l00057"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#a54692f11f281f0ba8ce56cd3551cc51e">00057</a> <span class="preprocessor">#define MAX_AUTH_RESPONSE_LENGTH 128</span>
<a name="l00058"></a>00058 <span class="preprocessor"></span>
<a name="l00066"></a>00066 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00067"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#afbebdc992cfca4247f9d92948c74e18e">00067</a> <a class="code" href="../../d3/d5c/digestauth_8c.html#afbebdc992cfca4247f9d92948c74e18e">cvthex</a>(<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *bin,
<a name="l00068"></a>00068 <span class="keywordtype">size_t</span> len,
<a name="l00069"></a>00069 <span class="keywordtype">char</span> *hex)
<a name="l00070"></a>00070 {
<a name="l00071"></a>00071 <span class="keywordtype">size_t</span> i;
<a name="l00072"></a>00072 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> j;
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="keywordflow">for</span> (i = 0; i < len; ++i)
<a name="l00075"></a>00075 {
<a name="l00076"></a>00076 j = (bin[i] >> 4) & 0x0f;
<a name="l00077"></a>00077 hex[i * 2] = j <= 9 ? (j + <span class="charliteral">'0'</span>) : (j + <span class="charliteral">'a'</span> - 10);
<a name="l00078"></a>00078 j = bin[i] & 0x0f;
<a name="l00079"></a>00079 hex[i * 2 + 1] = j <= 9 ? (j + <span class="charliteral">'0'</span>) : (j + <span class="charliteral">'a'</span> - 10);
<a name="l00080"></a>00080 }
<a name="l00081"></a>00081 hex[len * 2] = <span class="charliteral">'\0'</span>;
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083
<a name="l00096"></a>00096 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00097"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#ab7efffdbf8b2fdcd21e5f5eba36c09b0">00097</a> <a class="code" href="../../d3/d5c/digestauth_8c.html#ab7efffdbf8b2fdcd21e5f5eba36c09b0">digest_calc_ha1</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *alg,
<a name="l00098"></a>00098 <span class="keyword">const</span> <span class="keywordtype">char</span> *username,
<a name="l00099"></a>00099 <span class="keyword">const</span> <span class="keywordtype">char</span> *realm,
<a name="l00100"></a>00100 <span class="keyword">const</span> <span class="keywordtype">char</span> *password,
<a name="l00101"></a>00101 <span class="keyword">const</span> <span class="keywordtype">char</span> *nonce,
<a name="l00102"></a>00102 <span class="keyword">const</span> <span class="keywordtype">char</span> *cnonce,
<a name="l00103"></a>00103 <span class="keywordtype">char</span> *sessionkey)
<a name="l00104"></a>00104 {
<a name="l00105"></a>00105 <span class="keyword">struct </span><a class="code" href="../../d1/d32/structMD5Context.html">MD5Context</a> md5;
<a name="l00106"></a>00106 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ha1[MD5_DIGEST_SIZE];
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <a class="code" href="../../d7/d6c/md5_8c.html#a2bbee602c0d0da64387e4a15bbf536ac">MD5Init</a> (&md5);
<a name="l00109"></a>00109 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, username, strlen (username));
<a name="l00110"></a>00110 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00111"></a>00111 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, realm, strlen (realm));
<a name="l00112"></a>00112 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00113"></a>00113 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, password, strlen (password));
<a name="l00114"></a>00114 <a class="code" href="../../d7/d6c/md5_8c.html#a4eeac999f71dc03917b0fab90a4e703a">MD5Final</a> (ha1, &md5);
<a name="l00115"></a>00115 <span class="keywordflow">if</span> (0 == strcasecmp(alg, <span class="stringliteral">"md5-sess"</span>))
<a name="l00116"></a>00116 {
<a name="l00117"></a>00117 <a class="code" href="../../d7/d6c/md5_8c.html#a2bbee602c0d0da64387e4a15bbf536ac">MD5Init</a> (&md5);
<a name="l00118"></a>00118 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, ha1, <span class="keyword">sizeof</span> (ha1));
<a name="l00119"></a>00119 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00120"></a>00120 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, nonce, strlen (nonce));
<a name="l00121"></a>00121 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00122"></a>00122 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, cnonce, strlen (cnonce));
<a name="l00123"></a>00123 <a class="code" href="../../d7/d6c/md5_8c.html#a4eeac999f71dc03917b0fab90a4e703a">MD5Final</a> (ha1, &md5);
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125 <a class="code" href="../../d3/d5c/digestauth_8c.html#afbebdc992cfca4247f9d92948c74e18e">cvthex</a>(ha1, <span class="keyword">sizeof</span> (ha1), sessionkey);
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127
<a name="l00128"></a>00128
<a name="l00142"></a>00142 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00143"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#ab4a23d78c819ed80ef24e5d39d9bb31a">00143</a> <a class="code" href="../../d3/d5c/digestauth_8c.html#ab4a23d78c819ed80ef24e5d39d9bb31a">digest_calc_response</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *ha1,
<a name="l00144"></a>00144 <span class="keyword">const</span> <span class="keywordtype">char</span> *nonce,
<a name="l00145"></a>00145 <span class="keyword">const</span> <span class="keywordtype">char</span> *noncecount,
<a name="l00146"></a>00146 <span class="keyword">const</span> <span class="keywordtype">char</span> *cnonce,
<a name="l00147"></a>00147 <span class="keyword">const</span> <span class="keywordtype">char</span> *qop,
<a name="l00148"></a>00148 <span class="keyword">const</span> <span class="keywordtype">char</span> *method,
<a name="l00149"></a>00149 <span class="keyword">const</span> <span class="keywordtype">char</span> *uri,
<a name="l00150"></a>00150 <span class="keyword">const</span> <span class="keywordtype">char</span> *hentity,
<a name="l00151"></a>00151 <span class="keywordtype">char</span> *response)
<a name="l00152"></a>00152 {
<a name="l00153"></a>00153 <span class="keyword">struct </span><a class="code" href="../../d1/d32/structMD5Context.html">MD5Context</a> md5;
<a name="l00154"></a>00154 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ha2[MD5_DIGEST_SIZE];
<a name="l00155"></a>00155 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> resphash[MD5_DIGEST_SIZE];
<a name="l00156"></a>00156 <span class="keywordtype">char</span> ha2hex[<a class="code" href="../../d3/d5c/digestauth_8c.html#a2f5d5a398fdba2a14d581ad8e2bdde34">HASH_MD5_HEX_LEN</a> + 1];
<a name="l00157"></a>00157
<a name="l00158"></a>00158 <a class="code" href="../../d7/d6c/md5_8c.html#a2bbee602c0d0da64387e4a15bbf536ac">MD5Init</a> (&md5);
<a name="l00159"></a>00159 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, method, strlen(method));
<a name="l00160"></a>00160 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00161"></a>00161 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, uri, strlen(uri));
<a name="l00162"></a>00162 <span class="preprocessor">#if 0</span>
<a name="l00163"></a>00163 <span class="preprocessor"></span> <span class="keywordflow">if</span> (strcasecmp(qop, <span class="stringliteral">"auth-int"</span>) == 0)
<a name="l00164"></a>00164 {
<a name="l00165"></a>00165 <span class="comment">/* This is dead code since the rest of this module does</span>
<a name="l00166"></a>00166 <span class="comment"> not support auth-int. */</span>
<a name="l00167"></a>00167 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00168"></a>00168 <span class="keywordflow">if</span> (hentity != <a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00169"></a>00169 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, hentity, strlen(hentity));
<a name="l00170"></a>00170 }
<a name="l00171"></a>00171 <span class="preprocessor">#endif </span>
<a name="l00172"></a>00172 <span class="preprocessor"></span> <a class="code" href="../../d7/d6c/md5_8c.html#a4eeac999f71dc03917b0fab90a4e703a">MD5Final</a> (ha2, &md5);
<a name="l00173"></a>00173 <a class="code" href="../../d3/d5c/digestauth_8c.html#afbebdc992cfca4247f9d92948c74e18e">cvthex</a>(ha2, <a class="code" href="../../da/db0/md5_8h.html#ad86b38d6ab14e243543904e30f26bed2">MD5_DIGEST_SIZE</a>, ha2hex);
<a name="l00174"></a>00174 <a class="code" href="../../d7/d6c/md5_8c.html#a2bbee602c0d0da64387e4a15bbf536ac">MD5Init</a> (&md5);
<a name="l00175"></a>00175 <span class="comment">/* calculate response */</span>
<a name="l00176"></a>00176 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, ha1, <a class="code" href="../../d3/d5c/digestauth_8c.html#a2f5d5a398fdba2a14d581ad8e2bdde34">HASH_MD5_HEX_LEN</a>);
<a name="l00177"></a>00177 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00178"></a>00178 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, nonce, strlen(nonce));
<a name="l00179"></a>00179 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00180"></a>00180 <span class="keywordflow">if</span> (<span class="charliteral">'\0'</span> != *qop)
<a name="l00181"></a>00181 {
<a name="l00182"></a>00182 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, noncecount, strlen(noncecount));
<a name="l00183"></a>00183 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00184"></a>00184 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, cnonce, strlen(cnonce));
<a name="l00185"></a>00185 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00186"></a>00186 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, qop, strlen(qop));
<a name="l00187"></a>00187 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00188"></a>00188 }
<a name="l00189"></a>00189 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a> (&md5, ha2hex, <a class="code" href="../../d3/d5c/digestauth_8c.html#a2f5d5a398fdba2a14d581ad8e2bdde34">HASH_MD5_HEX_LEN</a>);
<a name="l00190"></a>00190 <a class="code" href="../../d7/d6c/md5_8c.html#a4eeac999f71dc03917b0fab90a4e703a">MD5Final</a> (resphash, &md5);
<a name="l00191"></a>00191 <a class="code" href="../../d3/d5c/digestauth_8c.html#afbebdc992cfca4247f9d92948c74e18e">cvthex</a>(resphash, <span class="keyword">sizeof</span> (resphash), response);
<a name="l00192"></a>00192 }
<a name="l00193"></a>00193
<a name="l00194"></a>00194
<a name="l00209"></a>00209 <span class="keyword">static</span> <span class="keywordtype">int</span>
<a name="l00210"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#acbec76abd5b5f50a68654081bd14c242">00210</a> <a class="code" href="../../d3/d5c/digestauth_8c.html#acbec76abd5b5f50a68654081bd14c242">lookup_sub_value</a>(<span class="keywordtype">char</span> *dest,
<a name="l00211"></a>00211 <span class="keywordtype">size_t</span> size,
<a name="l00212"></a>00212 <span class="keyword">const</span> <span class="keywordtype">char</span> *data,
<a name="l00213"></a>00213 <span class="keyword">const</span> <span class="keywordtype">char</span> *key)
<a name="l00214"></a>00214 {
<a name="l00215"></a>00215 <span class="keywordtype">size_t</span> keylen = strlen(key);
<a name="l00216"></a>00216 <span class="keywordtype">size_t</span> len;
<a name="l00217"></a>00217 <span class="keyword">const</span> <span class="keywordtype">char</span> *ptr = data;
<a name="l00218"></a>00218 <span class="keyword">const</span> <span class="keywordtype">char</span> *eq;
<a name="l00219"></a>00219 <span class="keyword">const</span> <span class="keywordtype">char</span> *q1;
<a name="l00220"></a>00220 <span class="keyword">const</span> <span class="keywordtype">char</span> *q2;
<a name="l00221"></a>00221 <span class="keyword">const</span> <span class="keywordtype">char</span> *qn;
<a name="l00222"></a>00222
<a name="l00223"></a>00223 <span class="keywordflow">if</span> (0 == size)
<a name="l00224"></a>00224 <span class="keywordflow">return</span> 0;
<a name="l00225"></a>00225 <span class="keywordflow">while</span> (<span class="charliteral">'\0'</span> != *ptr)
<a name="l00226"></a>00226 {
<a name="l00227"></a>00227 <span class="keywordflow">if</span> (<a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a> == (eq = strstr (ptr, <span class="stringliteral">"="</span>)))
<a name="l00228"></a>00228 <span class="keywordflow">return</span> 0;
<a name="l00229"></a>00229 q1 = eq + 1;
<a name="l00230"></a>00230 <span class="keywordflow">while</span> (<span class="charliteral">' '</span> == *q1)
<a name="l00231"></a>00231 q1++;
<a name="l00232"></a>00232 <span class="keywordflow">if</span> (<span class="charliteral">'\"'</span> != *q1)
<a name="l00233"></a>00233 {
<a name="l00234"></a>00234 q2 = strstr (q1, <span class="stringliteral">","</span>);
<a name="l00235"></a>00235 qn = q2;
<a name="l00236"></a>00236 }
<a name="l00237"></a>00237 <span class="keywordflow">else</span>
<a name="l00238"></a>00238 {
<a name="l00239"></a>00239 q1++;
<a name="l00240"></a>00240 q2 = strstr (q1, <span class="stringliteral">"\""</span>);
<a name="l00241"></a>00241 <span class="keywordflow">if</span> (<a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a> == q2)
<a name="l00242"></a>00242 <span class="keywordflow">return</span> 0; <span class="comment">/* end quote not found */</span>
<a name="l00243"></a>00243 qn = q2 + 1;
<a name="l00244"></a>00244 }
<a name="l00245"></a>00245 <span class="keywordflow">if</span> ( (0 == strncasecmp (ptr,
<a name="l00246"></a>00246 key,
<a name="l00247"></a>00247 keylen)) &&
<a name="l00248"></a>00248 (eq == &ptr[keylen]) )
<a name="l00249"></a>00249 {
<a name="l00250"></a>00250 <span class="keywordflow">if</span> (q2 == <a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00251"></a>00251 {
<a name="l00252"></a>00252 len = strlen (q1) + 1;
<a name="l00253"></a>00253 <span class="keywordflow">if</span> (size > len)
<a name="l00254"></a>00254 size = len;
<a name="l00255"></a>00255 size--;
<a name="l00256"></a>00256 strncpy (dest,
<a name="l00257"></a>00257 q1,
<a name="l00258"></a>00258 size);
<a name="l00259"></a>00259 dest[size] = <span class="charliteral">'\0'</span>;
<a name="l00260"></a>00260 <span class="keywordflow">return</span> size;
<a name="l00261"></a>00261 }
<a name="l00262"></a>00262 <span class="keywordflow">else</span>
<a name="l00263"></a>00263 {
<a name="l00264"></a>00264 <span class="keywordflow">if</span> (size > (q2 - q1) + 1)
<a name="l00265"></a>00265 size = (q2 - q1) + 1;
<a name="l00266"></a>00266 size--;
<a name="l00267"></a>00267 memcpy (dest,
<a name="l00268"></a>00268 q1,
<a name="l00269"></a>00269 size);
<a name="l00270"></a>00270 dest[size] = <span class="charliteral">'\0'</span>;
<a name="l00271"></a>00271 <span class="keywordflow">return</span> size;
<a name="l00272"></a>00272 }
<a name="l00273"></a>00273 }
<a name="l00274"></a>00274 <span class="keywordflow">if</span> (<a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a> == qn)
<a name="l00275"></a>00275 <span class="keywordflow">return</span> 0;
<a name="l00276"></a>00276 ptr = strstr (qn, <span class="stringliteral">","</span>);
<a name="l00277"></a>00277 <span class="keywordflow">if</span> (<a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a> == ptr)
<a name="l00278"></a>00278 <span class="keywordflow">return</span> 0;
<a name="l00279"></a>00279 ptr++;
<a name="l00280"></a>00280 <span class="keywordflow">while</span> (<span class="charliteral">' '</span> == *ptr)
<a name="l00281"></a>00281 ptr++;
<a name="l00282"></a>00282 }
<a name="l00283"></a>00283 <span class="keywordflow">return</span> 0;
<a name="l00284"></a>00284 }
<a name="l00285"></a>00285
<a name="l00286"></a>00286
<a name="l00296"></a>00296 <span class="keyword">static</span> <span class="keywordtype">int</span>
<a name="l00297"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#abe126b586c2642612cbf0f45361d48e8">00297</a> <a class="code" href="../../d3/d5c/digestauth_8c.html#abe126b586c2642612cbf0f45361d48e8">check_nonce_nc</a> (<span class="keyword">struct</span> <a class="code" href="../../df/d50/structMHD__Connection.html">MHD_Connection</a> *connection,
<a name="l00298"></a>00298 <span class="keyword">const</span> <span class="keywordtype">char</span> *nonce,
<a name="l00299"></a>00299 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> nc)
<a name="l00300"></a>00300 {
<a name="l00301"></a>00301 uint32_t off;
<a name="l00302"></a>00302 uint32_t mod;
<a name="l00303"></a>00303 <span class="keyword">const</span> <span class="keywordtype">char</span> *np;
<a name="l00304"></a>00304
<a name="l00305"></a>00305 mod = connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>->nonce_nc_size;
<a name="l00306"></a>00306 <span class="keywordflow">if</span> (0 == mod)
<a name="l00307"></a>00307 <span class="keywordflow">return</span> MHD_NO; <span class="comment">/* no array! */</span>
<a name="l00308"></a>00308 <span class="comment">/* super-fast xor-based "hash" function for HT lookup in nonce array */</span>
<a name="l00309"></a>00309 off = 0;
<a name="l00310"></a>00310 np = nonce;
<a name="l00311"></a>00311 <span class="keywordflow">while</span> (*np != <span class="charliteral">'\0'</span>)
<a name="l00312"></a>00312 {
<a name="l00313"></a>00313 off = (off << 8) | (*np ^ (off >> 24));
<a name="l00314"></a>00314 np++;
<a name="l00315"></a>00315 }
<a name="l00316"></a>00316 off = off % mod;
<a name="l00317"></a>00317 <span class="comment">/*</span>
<a name="l00318"></a>00318 <span class="comment"> * Look for the nonce, if it does exist and its corresponding</span>
<a name="l00319"></a>00319 <span class="comment"> * nonce counter is less than the current nonce counter by 1,</span>
<a name="l00320"></a>00320 <span class="comment"> * then only increase the nonce counter by one.</span>
<a name="l00321"></a>00321 <span class="comment"> */</span>
<a name="l00322"></a>00322
<a name="l00323"></a>00323 pthread_mutex_lock(&connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>->nnc_lock);
<a name="l00324"></a>00324 <span class="keywordflow">if</span> (nc == 0)
<a name="l00325"></a>00325 {
<a name="l00326"></a>00326 strcpy(connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>->nnc[off].nonce,
<a name="l00327"></a>00327 nonce);
<a name="l00328"></a>00328 connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>->nnc[off].nc = 0;
<a name="l00329"></a>00329 pthread_mutex_unlock(&connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>->nnc_lock);
<a name="l00330"></a>00330 <span class="keywordflow">return</span> MHD_YES;
<a name="l00331"></a>00331 }
<a name="l00332"></a>00332 <span class="keywordflow">if</span> ( (nc <= connection->daemon->nnc[off].nc) ||
<a name="l00333"></a>00333 (0 != strcmp(connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>->nnc[off].nonce, nonce)) )
<a name="l00334"></a>00334 {
<a name="l00335"></a>00335 pthread_mutex_unlock(&connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>->nnc_lock);
<a name="l00336"></a>00336 <span class="preprocessor">#if HAVE_MESSAGES</span>
<a name="l00337"></a>00337 <span class="preprocessor"></span> MHD_DLOG (connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>,
<a name="l00338"></a>00338 <span class="stringliteral">"Stale nonce received. If this happens a lot, you should probably increase the size of the nonce array.\n"</span>);
<a name="l00339"></a>00339 <span class="preprocessor">#endif</span>
<a name="l00340"></a>00340 <span class="preprocessor"></span> <span class="keywordflow">return</span> MHD_NO;
<a name="l00341"></a>00341 }
<a name="l00342"></a>00342 connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>->nnc[off].nc = nc;
<a name="l00343"></a>00343 pthread_mutex_unlock(&connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>->nnc_lock);
<a name="l00344"></a>00344 <span class="keywordflow">return</span> MHD_YES;
<a name="l00345"></a>00345 }
<a name="l00346"></a>00346
<a name="l00347"></a>00347
<a name="l00355"></a>00355 <span class="keywordtype">char</span> *
<a name="l00356"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#a4fa3834833e37ec4b52e57bb55a00c27">00356</a> <a class="code" href="../../dc/d0c/microhttpd_8h.html#a4fa3834833e37ec4b52e57bb55a00c27">MHD_digest_auth_get_username</a>(<span class="keyword">struct</span> <a class="code" href="../../df/d50/structMHD__Connection.html">MHD_Connection</a> *connection)
<a name="l00357"></a>00357 {
<a name="l00358"></a>00358 <span class="keywordtype">size_t</span> len;
<a name="l00359"></a>00359 <span class="keywordtype">char</span> user[MAX_USERNAME_LENGTH];
<a name="l00360"></a>00360 <span class="keyword">const</span> <span class="keywordtype">char</span> *header;
<a name="l00361"></a>00361
<a name="l00362"></a>00362 header = <a class="code" href="../../dc/d0c/microhttpd_8h.html#adef6bc2332eccb6d5f1679b11fb69b9c">MHD_lookup_connection_value</a>(connection,
<a name="l00363"></a>00363 <a class="code" href="../../dc/d0c/microhttpd_8h.html#ab5475b4e8aa05a99c49b3ac916cf7a3aadcde62bdb2e9eafdd8558e770e8bb904">MHD_HEADER_KIND</a>,
<a name="l00364"></a>00364 <a class="code" href="../../dc/d0c/microhttpd_8h.html#a4400070683cba949249129b8ed2f4703">MHD_HTTP_HEADER_AUTHORIZATION</a>);
<a name="l00365"></a>00365 <span class="keywordflow">if</span> (header == <a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00366"></a>00366 <span class="keywordflow">return</span> NULL;
<a name="l00367"></a>00367 <span class="keywordflow">if</span> (strncmp(header, <a class="code" href="../../d3/d5c/digestauth_8c.html#aa16efc9e8c49f37521999e16d47818dc">_BASE</a>, strlen(<a class="code" href="../../d3/d5c/digestauth_8c.html#aa16efc9e8c49f37521999e16d47818dc">_BASE</a>)) != 0)
<a name="l00368"></a>00368 <span class="keywordflow">return</span> NULL;
<a name="l00369"></a>00369 header += strlen (<a class="code" href="../../d3/d5c/digestauth_8c.html#aa16efc9e8c49f37521999e16d47818dc">_BASE</a>);
<a name="l00370"></a>00370 len = <a class="code" href="../../d3/d5c/digestauth_8c.html#acbec76abd5b5f50a68654081bd14c242">lookup_sub_value</a>(user,
<a name="l00371"></a>00371 <span class="keyword">sizeof</span> (user),
<a name="l00372"></a>00372 header,
<a name="l00373"></a>00373 <span class="stringliteral">"username"</span>);
<a name="l00374"></a>00374 <span class="keywordflow">if</span> (!len)
<a name="l00375"></a>00375 <span class="keywordflow">return</span> NULL;
<a name="l00376"></a>00376 <span class="keywordflow">return</span> strdup(user);
<a name="l00377"></a>00377 }
<a name="l00378"></a>00378
<a name="l00379"></a>00379
<a name="l00393"></a>00393 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00394"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#aa5718302295510ef153af2850061e544">00394</a> <a class="code" href="../../d3/d5c/digestauth_8c.html#aa5718302295510ef153af2850061e544">calculate_nonce</a> (uint32_t nonce_time,
<a name="l00395"></a>00395 <span class="keyword">const</span> <span class="keywordtype">char</span> *method,
<a name="l00396"></a>00396 <span class="keyword">const</span> <span class="keywordtype">char</span> *rnd,
<a name="l00397"></a>00397 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> rnd_size,
<a name="l00398"></a>00398 <span class="keyword">const</span> <span class="keywordtype">char</span> *uri,
<a name="l00399"></a>00399 <span class="keyword">const</span> <span class="keywordtype">char</span> *realm,
<a name="l00400"></a>00400 <span class="keywordtype">char</span> *nonce)
<a name="l00401"></a>00401 {
<a name="l00402"></a>00402 <span class="keyword">struct </span><a class="code" href="../../d1/d32/structMD5Context.html">MD5Context</a> md5;
<a name="l00403"></a>00403 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> timestamp[4];
<a name="l00404"></a>00404 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> tmpnonce[MD5_DIGEST_SIZE];
<a name="l00405"></a>00405 <span class="keywordtype">char</span> timestamphex[<span class="keyword">sizeof</span>(timestamp)*2+1];
<a name="l00406"></a>00406
<a name="l00407"></a>00407 <a class="code" href="../../d7/d6c/md5_8c.html#a2bbee602c0d0da64387e4a15bbf536ac">MD5Init</a> (&md5);
<a name="l00408"></a>00408 timestamp[0] = (nonce_time & 0xff000000) >> 0x18;
<a name="l00409"></a>00409 timestamp[1] = (nonce_time & 0x00ff0000) >> 0x10;
<a name="l00410"></a>00410 timestamp[2] = (nonce_time & 0x0000ff00) >> 0x08;
<a name="l00411"></a>00411 timestamp[3] = (nonce_time & 0x000000ff);
<a name="l00412"></a>00412 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a>(&md5, timestamp, 4);
<a name="l00413"></a>00413 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a>(&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00414"></a>00414 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a>(&md5, method, strlen(method));
<a name="l00415"></a>00415 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a>(&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00416"></a>00416 <span class="keywordflow">if</span> (rnd_size > 0)
<a name="l00417"></a>00417 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a>(&md5, rnd, rnd_size);
<a name="l00418"></a>00418 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a>(&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00419"></a>00419 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a>(&md5, uri, strlen(uri));
<a name="l00420"></a>00420 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a>(&md5, <span class="stringliteral">":"</span>, 1);
<a name="l00421"></a>00421 <a class="code" href="../../d7/d6c/md5_8c.html#adca0f429128f135876a7864813cc2cf6">MD5Update</a>(&md5, realm, strlen(realm));
<a name="l00422"></a>00422 <a class="code" href="../../d7/d6c/md5_8c.html#a4eeac999f71dc03917b0fab90a4e703a">MD5Final</a> (tmpnonce, &md5);
<a name="l00423"></a>00423 <a class="code" href="../../d3/d5c/digestauth_8c.html#afbebdc992cfca4247f9d92948c74e18e">cvthex</a>(tmpnonce, <span class="keyword">sizeof</span> (tmpnonce), nonce);
<a name="l00424"></a>00424 <a class="code" href="../../d3/d5c/digestauth_8c.html#afbebdc992cfca4247f9d92948c74e18e">cvthex</a>(timestamp, 4, timestamphex);
<a name="l00425"></a>00425 strncat(nonce, timestamphex, 8);
<a name="l00426"></a>00426 }
<a name="l00427"></a>00427
<a name="l00428"></a>00428
<a name="l00441"></a>00441 <span class="keywordtype">int</span>
<a name="l00442"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#a884dd2ba2e4a82f9b6584e8a8a111046">00442</a> <a class="code" href="../../dc/d0c/microhttpd_8h.html#a884dd2ba2e4a82f9b6584e8a8a111046">MHD_digest_auth_check</a>(<span class="keyword">struct</span> <a class="code" href="../../df/d50/structMHD__Connection.html">MHD_Connection</a> *connection,
<a name="l00443"></a>00443 <span class="keyword">const</span> <span class="keywordtype">char</span> *realm,
<a name="l00444"></a>00444 <span class="keyword">const</span> <span class="keywordtype">char</span> *username,
<a name="l00445"></a>00445 <span class="keyword">const</span> <span class="keywordtype">char</span> *password,
<a name="l00446"></a>00446 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> nonce_timeout)
<a name="l00447"></a>00447 {
<a name="l00448"></a>00448 <span class="keywordtype">size_t</span> len;
<a name="l00449"></a>00449 <span class="keyword">const</span> <span class="keywordtype">char</span> *header;
<a name="l00450"></a>00450 <span class="keywordtype">char</span> nonce[MAX_NONCE_LENGTH];
<a name="l00451"></a>00451 <span class="keywordtype">char</span> cnonce[MAX_NONCE_LENGTH];
<a name="l00452"></a>00452 <span class="keywordtype">char</span> qop[15]; <span class="comment">/* auth,auth-int */</span>
<a name="l00453"></a>00453 <span class="keywordtype">char</span> nc[20];
<a name="l00454"></a>00454 <span class="keywordtype">char</span> response[MAX_AUTH_RESPONSE_LENGTH];
<a name="l00455"></a>00455 <span class="keyword">const</span> <span class="keywordtype">char</span> *hentity = NULL; <span class="comment">/* "auth-int" is not supported */</span>
<a name="l00456"></a>00456 <span class="keywordtype">char</span> ha1[<a class="code" href="../../d3/d5c/digestauth_8c.html#a2f5d5a398fdba2a14d581ad8e2bdde34">HASH_MD5_HEX_LEN</a> + 1];
<a name="l00457"></a>00457 <span class="keywordtype">char</span> respexp[<a class="code" href="../../d3/d5c/digestauth_8c.html#a2f5d5a398fdba2a14d581ad8e2bdde34">HASH_MD5_HEX_LEN</a> + 1];
<a name="l00458"></a>00458 <span class="keywordtype">char</span> noncehashexp[<a class="code" href="../../d3/d5c/digestauth_8c.html#a2f5d5a398fdba2a14d581ad8e2bdde34">HASH_MD5_HEX_LEN</a> + 9];
<a name="l00459"></a>00459 uint32_t nonce_time;
<a name="l00460"></a>00460 uint32_t t;
<a name="l00461"></a>00461 <span class="keywordtype">size_t</span> left; <span class="comment">/* number of characters left in 'header' for 'uri' */</span>
<a name="l00462"></a>00462 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> nci;
<a name="l00463"></a>00463
<a name="l00464"></a>00464 header = <a class="code" href="../../dc/d0c/microhttpd_8h.html#adef6bc2332eccb6d5f1679b11fb69b9c">MHD_lookup_connection_value</a>(connection,
<a name="l00465"></a>00465 <a class="code" href="../../dc/d0c/microhttpd_8h.html#ab5475b4e8aa05a99c49b3ac916cf7a3aadcde62bdb2e9eafdd8558e770e8bb904">MHD_HEADER_KIND</a>,
<a name="l00466"></a>00466 <a class="code" href="../../dc/d0c/microhttpd_8h.html#a4400070683cba949249129b8ed2f4703">MHD_HTTP_HEADER_AUTHORIZATION</a>);
<a name="l00467"></a>00467 <span class="keywordflow">if</span> (header == <a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00468"></a>00468 <span class="keywordflow">return</span> MHD_NO;
<a name="l00469"></a>00469 <span class="keywordflow">if</span> (strncmp(header, <a class="code" href="../../d3/d5c/digestauth_8c.html#aa16efc9e8c49f37521999e16d47818dc">_BASE</a>, strlen(<a class="code" href="../../d3/d5c/digestauth_8c.html#aa16efc9e8c49f37521999e16d47818dc">_BASE</a>)) != 0)
<a name="l00470"></a>00470 <span class="keywordflow">return</span> MHD_NO;
<a name="l00471"></a>00471 header += strlen (<a class="code" href="../../d3/d5c/digestauth_8c.html#aa16efc9e8c49f37521999e16d47818dc">_BASE</a>);
<a name="l00472"></a>00472 left = strlen (header);
<a name="l00473"></a>00473
<a name="l00474"></a>00474 {
<a name="l00475"></a>00475 <span class="keywordtype">char</span> un[MAX_USERNAME_LENGTH];
<a name="l00476"></a>00476 len = <a class="code" href="../../d3/d5c/digestauth_8c.html#acbec76abd5b5f50a68654081bd14c242">lookup_sub_value</a>(un,
<a name="l00477"></a>00477 <span class="keyword">sizeof</span> (un),
<a name="l00478"></a>00478 header, <span class="stringliteral">"username"</span>);
<a name="l00479"></a>00479 <span class="keywordflow">if</span> ( (!len) ||
<a name="l00480"></a>00480 (strcmp(username, un) != 0) )
<a name="l00481"></a>00481 <span class="keywordflow">return</span> MHD_NO;
<a name="l00482"></a>00482 left -= strlen (<span class="stringliteral">"username"</span>) + len;
<a name="l00483"></a>00483 }
<a name="l00484"></a>00484
<a name="l00485"></a>00485 {
<a name="l00486"></a>00486 <span class="keywordtype">char</span> r[MAX_REALM_LENGTH];
<a name="l00487"></a>00487 len = <a class="code" href="../../d3/d5c/digestauth_8c.html#acbec76abd5b5f50a68654081bd14c242">lookup_sub_value</a>(r,
<a name="l00488"></a>00488 <span class="keyword">sizeof</span> (r),
<a name="l00489"></a>00489 header, <span class="stringliteral">"realm"</span>);
<a name="l00490"></a>00490 <span class="keywordflow">if</span> ( (!len) ||
<a name="l00491"></a>00491 (strcmp(realm, r) != 0) )
<a name="l00492"></a>00492 <span class="keywordflow">return</span> MHD_NO;
<a name="l00493"></a>00493 left -= strlen (<span class="stringliteral">"realm"</span>) + len;
<a name="l00494"></a>00494 }
<a name="l00495"></a>00495
<a name="l00496"></a>00496 <span class="keywordflow">if</span> (0 == (len = <a class="code" href="../../d3/d5c/digestauth_8c.html#acbec76abd5b5f50a68654081bd14c242">lookup_sub_value</a>(nonce,
<a name="l00497"></a>00497 <span class="keyword">sizeof</span> (nonce),
<a name="l00498"></a>00498 header, <span class="stringliteral">"nonce"</span>)))
<a name="l00499"></a>00499 <span class="keywordflow">return</span> MHD_NO;
<a name="l00500"></a>00500 left -= strlen (<span class="stringliteral">"nonce"</span>) + len;
<a name="l00501"></a>00501
<a name="l00502"></a>00502 {
<a name="l00503"></a>00503 <span class="keywordtype">char</span> uri[left];
<a name="l00504"></a>00504
<a name="l00505"></a>00505 <span class="keywordflow">if</span> (0 == <a class="code" href="../../d3/d5c/digestauth_8c.html#acbec76abd5b5f50a68654081bd14c242">lookup_sub_value</a>(uri,
<a name="l00506"></a>00506 <span class="keyword">sizeof</span> (uri),
<a name="l00507"></a>00507 header, <span class="stringliteral">"uri"</span>))
<a name="l00508"></a>00508 <span class="keywordflow">return</span> MHD_NO;
<a name="l00509"></a>00509
<a name="l00510"></a>00510 <span class="comment">/* 8 = 4 hexadecimal numbers for the timestamp */</span>
<a name="l00511"></a>00511 nonce_time = strtoul(nonce + len - 8, (<span class="keywordtype">char</span> **)<a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>, 16);
<a name="l00512"></a>00512 t = (uint32_t) time(NULL);
<a name="l00513"></a>00513 <span class="comment">/*</span>
<a name="l00514"></a>00514 <span class="comment"> * First level vetting for the nonce validity</span>
<a name="l00515"></a>00515 <span class="comment"> * if the timestamp attached to the nonce</span>
<a name="l00516"></a>00516 <span class="comment"> * exceeds `nonce_timeout' then the nonce is</span>
<a name="l00517"></a>00517 <span class="comment"> * invalid.</span>
<a name="l00518"></a>00518 <span class="comment"> */</span>
<a name="l00519"></a>00519 <span class="keywordflow">if</span> (t > nonce_time + nonce_timeout)
<a name="l00520"></a>00520 <span class="keywordflow">return</span> MHD_INVALID_NONCE;
<a name="l00521"></a>00521 <a class="code" href="../../d3/d5c/digestauth_8c.html#aa5718302295510ef153af2850061e544">calculate_nonce</a> (nonce_time,
<a name="l00522"></a>00522 connection-><a class="code" href="../../df/d50/structMHD__Connection.html#a7872b97b30b552ffa0d27c45b5b3173b">method</a>,
<a name="l00523"></a>00523 connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>->digest_auth_random,
<a name="l00524"></a>00524 connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>->digest_auth_rand_size,
<a name="l00525"></a>00525 uri,
<a name="l00526"></a>00526 realm,
<a name="l00527"></a>00527 noncehashexp);
<a name="l00528"></a>00528 <span class="comment">/*</span>
<a name="l00529"></a>00529 <span class="comment"> * Second level vetting for the nonce validity</span>
<a name="l00530"></a>00530 <span class="comment"> * if the timestamp attached to the nonce is valid</span>
<a name="l00531"></a>00531 <span class="comment"> * and possibly fabricated (in case of an attack)</span>
<a name="l00532"></a>00532 <span class="comment"> * the attacker must also know the random seed to be</span>
<a name="l00533"></a>00533 <span class="comment"> * able to generate a "sane" nonce, which if he does</span>
<a name="l00534"></a>00534 <span class="comment"> * not, the nonce fabrication process going to be</span>
<a name="l00535"></a>00535 <span class="comment"> * very hard to achieve.</span>
<a name="l00536"></a>00536 <span class="comment"> */</span>
<a name="l00537"></a>00537
<a name="l00538"></a>00538 <span class="keywordflow">if</span> (0 != strcmp(nonce, noncehashexp))
<a name="l00539"></a>00539 <span class="keywordflow">return</span> MHD_INVALID_NONCE;
<a name="l00540"></a>00540 <span class="keywordflow">if</span> ( (0 == <a class="code" href="../../d3/d5c/digestauth_8c.html#acbec76abd5b5f50a68654081bd14c242">lookup_sub_value</a>(cnonce,
<a name="l00541"></a>00541 <span class="keyword">sizeof</span> (cnonce),
<a name="l00542"></a>00542 header, <span class="stringliteral">"cnonce"</span>)) ||
<a name="l00543"></a>00543 (0 == <a class="code" href="../../d3/d5c/digestauth_8c.html#acbec76abd5b5f50a68654081bd14c242">lookup_sub_value</a>(qop, <span class="keyword">sizeof</span> (qop), header, <span class="stringliteral">"qop"</span>)) ||
<a name="l00544"></a>00544 ( (0 != strcmp (qop, <span class="stringliteral">"auth"</span>)) &&
<a name="l00545"></a>00545 (0 != strcmp (qop, <span class="stringliteral">""</span>)) ) ||
<a name="l00546"></a>00546 (0 == <a class="code" href="../../d3/d5c/digestauth_8c.html#acbec76abd5b5f50a68654081bd14c242">lookup_sub_value</a>(nc, <span class="keyword">sizeof</span> (nc), header, <span class="stringliteral">"nc"</span>)) ||
<a name="l00547"></a>00547 (1 != sscanf (nc, <span class="stringliteral">"%u"</span>, &nci)) ||
<a name="l00548"></a>00548 (0 == <a class="code" href="../../d3/d5c/digestauth_8c.html#acbec76abd5b5f50a68654081bd14c242">lookup_sub_value</a>(response, <span class="keyword">sizeof</span> (response), header, <span class="stringliteral">"response"</span>)) )
<a name="l00549"></a>00549 <span class="keywordflow">return</span> MHD_NO;
<a name="l00550"></a>00550
<a name="l00551"></a>00551 <span class="comment">/*</span>
<a name="l00552"></a>00552 <span class="comment"> * Checking if that combination of nonce and nc is sound</span>
<a name="l00553"></a>00553 <span class="comment"> * and not a replay attack attempt. Also adds the nonce</span>
<a name="l00554"></a>00554 <span class="comment"> * to the nonce-nc map if it does not exist there.</span>
<a name="l00555"></a>00555 <span class="comment"> */</span>
<a name="l00556"></a>00556
<a name="l00557"></a>00557 <span class="keywordflow">if</span> (<a class="code" href="../../dc/d0c/microhttpd_8h.html#a802c6784232db3736734807f2fb54e5c">MHD_YES</a> != <a class="code" href="../../d3/d5c/digestauth_8c.html#abe126b586c2642612cbf0f45361d48e8">check_nonce_nc</a> (connection, nonce, nci))
<a name="l00558"></a>00558 <span class="keywordflow">return</span> MHD_NO;
<a name="l00559"></a>00559
<a name="l00560"></a>00560 <a class="code" href="../../d3/d5c/digestauth_8c.html#ab7efffdbf8b2fdcd21e5f5eba36c09b0">digest_calc_ha1</a>(<span class="stringliteral">"md5"</span>,
<a name="l00561"></a>00561 username,
<a name="l00562"></a>00562 realm,
<a name="l00563"></a>00563 password,
<a name="l00564"></a>00564 nonce,
<a name="l00565"></a>00565 cnonce,
<a name="l00566"></a>00566 ha1);
<a name="l00567"></a>00567 <a class="code" href="../../d3/d5c/digestauth_8c.html#ab4a23d78c819ed80ef24e5d39d9bb31a">digest_calc_response</a>(ha1,
<a name="l00568"></a>00568 nonce,
<a name="l00569"></a>00569 nc,
<a name="l00570"></a>00570 cnonce,
<a name="l00571"></a>00571 qop,
<a name="l00572"></a>00572 connection-><a class="code" href="../../df/d50/structMHD__Connection.html#a7872b97b30b552ffa0d27c45b5b3173b">method</a>,
<a name="l00573"></a>00573 uri,
<a name="l00574"></a>00574 hentity,
<a name="l00575"></a>00575 respexp);
<a name="l00576"></a>00576 <span class="keywordflow">return</span> strcmp(response, respexp) == 0 ? <a class="code" href="../../dc/d0c/microhttpd_8h.html#a802c6784232db3736734807f2fb54e5c">MHD_YES</a> : MHD_NO;
<a name="l00577"></a>00577 }
<a name="l00578"></a>00578 }
<a name="l00579"></a>00579
<a name="l00580"></a>00580
<a name="l00591"></a>00591 <span class="keywordtype">int</span>
<a name="l00592"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#ababd5733dd1c21de5c099ad1d9c3c418">00592</a> <a class="code" href="../../dc/d0c/microhttpd_8h.html#ababd5733dd1c21de5c099ad1d9c3c418">MHD_queue_auth_fail_response</a>(<span class="keyword">struct</span> <a class="code" href="../../df/d50/structMHD__Connection.html">MHD_Connection</a> *connection,
<a name="l00593"></a>00593 <span class="keyword">const</span> <span class="keywordtype">char</span> *realm,
<a name="l00594"></a>00594 <span class="keyword">const</span> <span class="keywordtype">char</span> *opaque,
<a name="l00595"></a>00595 <span class="keyword">struct</span> <a class="code" href="../../d5/d10/structMHD__Response.html">MHD_Response</a> *response,
<a name="l00596"></a>00596 <span class="keywordtype">int</span> signal_stale)
<a name="l00597"></a>00597 {
<a name="l00598"></a>00598 <span class="keywordtype">int</span> ret;
<a name="l00599"></a>00599 <span class="keywordtype">size_t</span> hlen;
<a name="l00600"></a>00600 <span class="keywordtype">char</span> nonce[<a class="code" href="../../d3/d5c/digestauth_8c.html#a2f5d5a398fdba2a14d581ad8e2bdde34">HASH_MD5_HEX_LEN</a> + 9];
<a name="l00601"></a>00601
<a name="l00602"></a>00602 <span class="comment">/* Generating the server nonce */</span>
<a name="l00603"></a>00603 <a class="code" href="../../d3/d5c/digestauth_8c.html#aa5718302295510ef153af2850061e544">calculate_nonce</a> ((uint32_t) time(<a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>),
<a name="l00604"></a>00604 connection-><a class="code" href="../../df/d50/structMHD__Connection.html#a7872b97b30b552ffa0d27c45b5b3173b">method</a>,
<a name="l00605"></a>00605 connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>->digest_auth_random,
<a name="l00606"></a>00606 connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>->digest_auth_rand_size,
<a name="l00607"></a>00607 connection-><a class="code" href="../../df/d50/structMHD__Connection.html#a113d6d7f52f3367616e54febb19609b3">url</a>,
<a name="l00608"></a>00608 realm,
<a name="l00609"></a>00609 nonce);
<a name="l00610"></a>00610 <span class="keywordflow">if</span> (<a class="code" href="../../dc/d0c/microhttpd_8h.html#a802c6784232db3736734807f2fb54e5c">MHD_YES</a> != <a class="code" href="../../d3/d5c/digestauth_8c.html#abe126b586c2642612cbf0f45361d48e8">check_nonce_nc</a> (connection, nonce, 0))
<a name="l00611"></a>00611 {
<a name="l00612"></a>00612 <span class="preprocessor">#if HAVE_MESSAGES</span>
<a name="l00613"></a>00613 <span class="preprocessor"></span> MHD_DLOG (connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>,
<a name="l00614"></a>00614 <span class="stringliteral">"Could not register nonce (is the nonce array size zero?).\n"</span>);
<a name="l00615"></a>00615 <span class="preprocessor">#endif</span>
<a name="l00616"></a>00616 <span class="preprocessor"></span> <span class="keywordflow">return</span> MHD_NO;
<a name="l00617"></a>00617 }
<a name="l00618"></a>00618 <span class="comment">/* Building the authentication header */</span>
<a name="l00619"></a>00619 hlen = snprintf(<a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>,
<a name="l00620"></a>00620 0,
<a name="l00621"></a>00621 <span class="stringliteral">"Digest realm=\"%s\",qop=\"auth\",nonce=\"%s\",opaque=\"%s\"%s"</span>,
<a name="l00622"></a>00622 realm,
<a name="l00623"></a>00623 nonce,
<a name="l00624"></a>00624 opaque,
<a name="l00625"></a>00625 signal_stale ? <span class="stringliteral">",stale=\"true\""</span> : <span class="stringliteral">""</span>);
<a name="l00626"></a>00626 {
<a name="l00627"></a>00627 <span class="keywordtype">char</span> header[hlen + 1];
<a name="l00628"></a>00628 snprintf(header,
<a name="l00629"></a>00629 <span class="keyword">sizeof</span>(header),
<a name="l00630"></a>00630 <span class="stringliteral">"Digest realm=\"%s\",qop=\"auth\",nonce=\"%s\",opaque=\"%s\"%s"</span>,
<a name="l00631"></a>00631 realm,
<a name="l00632"></a>00632 nonce,
<a name="l00633"></a>00633 opaque,
<a name="l00634"></a>00634 signal_stale ? <span class="stringliteral">",stale=\"true\""</span> : <span class="stringliteral">""</span>);
<a name="l00635"></a>00635 ret = <a class="code" href="../../dc/d0c/microhttpd_8h.html#a2091d2691bb976dc32606f6a2ead60bb">MHD_add_response_header</a>(response,
<a name="l00636"></a>00636 <a class="code" href="../../dc/d0c/microhttpd_8h.html#ad2f35dc8bf2ad4a675c9104e6cd97d55">MHD_HTTP_HEADER_WWW_AUTHENTICATE</a>,
<a name="l00637"></a>00637 header);
<a name="l00638"></a>00638 }
<a name="l00639"></a>00639 <span class="keywordflow">if</span> (<a class="code" href="../../dc/d0c/microhttpd_8h.html#a802c6784232db3736734807f2fb54e5c">MHD_YES</a> == ret)
<a name="l00640"></a>00640 ret = <a class="code" href="../../dc/d0c/microhttpd_8h.html#aa0ee587cdd6d860add50dbeb62a81fe1">MHD_queue_response</a>(connection,
<a name="l00641"></a>00641 <a class="code" href="../../dc/d0c/microhttpd_8h.html#a8d6ffe91a95aae60f81c49a272b5d4de">MHD_HTTP_UNAUTHORIZED</a>,
<a name="l00642"></a>00642 response);
<a name="l00643"></a>00643 <span class="keywordflow">return</span> ret;
<a name="l00644"></a>00644 }
<a name="l00645"></a>00645
<a name="l00646"></a>00646
<a name="l00655"></a>00655 <span class="keywordtype">char</span> *
<a name="l00656"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#abd1e3fa0e5a5b54f6127c50a0d509190">00656</a> <a class="code" href="../../dc/d0c/microhttpd_8h.html#abd1e3fa0e5a5b54f6127c50a0d509190">MHD_basic_auth_get_username_password</a>(<span class="keyword">struct</span> <a class="code" href="../../df/d50/structMHD__Connection.html">MHD_Connection</a> *connection,
<a name="l00657"></a>00657 <span class="keywordtype">char</span>** password)
<a name="l00658"></a>00658 {
<a name="l00659"></a>00659 <span class="keyword">const</span> <span class="keywordtype">char</span> *header;
<a name="l00660"></a>00660 <span class="keywordtype">char</span> *decode;
<a name="l00661"></a>00661 <span class="keyword">const</span> <span class="keywordtype">char</span> *separator;
<a name="l00662"></a>00662 <span class="keywordtype">char</span> *user;
<a name="l00663"></a>00663
<a name="l00664"></a>00664 header = <a class="code" href="../../dc/d0c/microhttpd_8h.html#adef6bc2332eccb6d5f1679b11fb69b9c">MHD_lookup_connection_value</a>(connection,
<a name="l00665"></a>00665 <a class="code" href="../../dc/d0c/microhttpd_8h.html#ab5475b4e8aa05a99c49b3ac916cf7a3aadcde62bdb2e9eafdd8558e770e8bb904">MHD_HEADER_KIND</a>,
<a name="l00666"></a>00666 <a class="code" href="../../dc/d0c/microhttpd_8h.html#a4400070683cba949249129b8ed2f4703">MHD_HTTP_HEADER_AUTHORIZATION</a>);
<a name="l00667"></a>00667 <span class="keywordflow">if</span> (header == <a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00668"></a>00668 <span class="keywordflow">return</span> NULL;
<a name="l00669"></a>00669 <span class="keywordflow">if</span> (strncmp(header, <a class="code" href="../../d3/d5c/digestauth_8c.html#ac9ae7f90d5195e72c134de9d658dcbed">_BASIC_BASE</a>, strlen(<a class="code" href="../../d3/d5c/digestauth_8c.html#ac9ae7f90d5195e72c134de9d658dcbed">_BASIC_BASE</a>)) != 0)
<a name="l00670"></a>00670 <span class="keywordflow">return</span> NULL;
<a name="l00671"></a>00671 header += strlen(<a class="code" href="../../d3/d5c/digestauth_8c.html#ac9ae7f90d5195e72c134de9d658dcbed">_BASIC_BASE</a>);
<a name="l00672"></a>00672 decode = <a class="code" href="../../db/d36/base64_8c.html#ae7d31ad81d9ec3bb6dd8402256b0f6a4">BASE64Decode</a>(header);
<a name="l00673"></a>00673 <span class="keywordflow">if</span> (decode == <a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00674"></a>00674 {
<a name="l00675"></a>00675 <span class="preprocessor">#if HAVE_MESSAGES</span>
<a name="l00676"></a>00676 <span class="preprocessor"></span> MHD_DLOG(connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>,
<a name="l00677"></a>00677 <span class="stringliteral">"Error decoding basic authentication\n"</span>);
<a name="l00678"></a>00678 <span class="preprocessor">#endif</span>
<a name="l00679"></a>00679 <span class="preprocessor"></span> <span class="keywordflow">return</span> NULL;
<a name="l00680"></a>00680 }
<a name="l00681"></a>00681 <span class="comment">/* Find user:password pattern */</span>
<a name="l00682"></a>00682 separator = strstr(decode, <span class="stringliteral">":"</span>);
<a name="l00683"></a>00683 <span class="keywordflow">if</span> (separator == <a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00684"></a>00684 {
<a name="l00685"></a>00685 <span class="preprocessor">#if HAVE_MESSAGES</span>
<a name="l00686"></a>00686 <span class="preprocessor"></span> MHD_DLOG(connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>,
<a name="l00687"></a>00687 <span class="stringliteral">"Basic authentication doesn't contain ':' separator\n"</span>);
<a name="l00688"></a>00688 <span class="preprocessor">#endif</span>
<a name="l00689"></a>00689 <span class="preprocessor"></span> free(decode);
<a name="l00690"></a>00690 <span class="keywordflow">return</span> NULL;
<a name="l00691"></a>00691 }
<a name="l00692"></a>00692 user = strdup(decode);
<a name="l00693"></a>00693 <span class="keywordflow">if</span> (<a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a> == user)
<a name="l00694"></a>00694 {
<a name="l00695"></a>00695 free (decode);
<a name="l00696"></a>00696 <span class="keywordflow">return</span> NULL;
<a name="l00697"></a>00697 }
<a name="l00698"></a>00698 user[separator - decode] = <span class="charliteral">'\0'</span>; <span class="comment">/* cut off at ':' */</span>
<a name="l00699"></a>00699 <span class="keywordflow">if</span> (password != <a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00700"></a>00700 {
<a name="l00701"></a>00701 *password = strdup(separator + 1);
<a name="l00702"></a>00702 <span class="keywordflow">if</span> (<a class="code" href="../../dc/df0/reason__phrase_8c.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a> == *password)
<a name="l00703"></a>00703 {
<a name="l00704"></a>00704 <span class="preprocessor">#if HAVE_MESSAGES</span>
<a name="l00705"></a>00705 <span class="preprocessor"></span> MHD_DLOG(connection-><a class="code" href="../../df/d50/structMHD__Connection.html#ad2a51c2f1ec5088469856c785ad2c04d">daemon</a>,
<a name="l00706"></a>00706 <span class="stringliteral">"Failed to allocate memory for password\n"</span>);
<a name="l00707"></a>00707 <span class="preprocessor">#endif</span>
<a name="l00708"></a>00708 <span class="preprocessor"></span> free (decode);
<a name="l00709"></a>00709 free (user);
<a name="l00710"></a>00710 <span class="keywordflow">return</span> NULL;
<a name="l00711"></a>00711 }
<a name="l00712"></a>00712 }
<a name="l00713"></a>00713 free(decode);
<a name="l00714"></a>00714 <span class="keywordflow">return</span> user;
<a name="l00715"></a>00715 }
<a name="l00716"></a>00716
<a name="l00717"></a>00717
<a name="l00725"></a>00725 <span class="keywordtype">int</span>
<a name="l00726"></a><a class="code" href="../../d3/d5c/digestauth_8c.html#a3deb764f416186b9b5868d5bce13305c">00726</a> <a class="code" href="../../dc/d0c/microhttpd_8h.html#a3deb764f416186b9b5868d5bce13305c">MHD_queue_basic_auth_fail_response</a>(<span class="keyword">struct</span> <a class="code" href="../../df/d50/structMHD__Connection.html">MHD_Connection</a> *connection,
<a name="l00727"></a>00727 <span class="keyword">const</span> <span class="keywordtype">char</span> *realm,
<a name="l00728"></a>00728 <span class="keyword">struct</span> <a class="code" href="../../d5/d10/structMHD__Response.html">MHD_Response</a> *response)
<a name="l00729"></a>00729 {
<a name="l00730"></a>00730 <span class="keywordtype">int</span> ret;
<a name="l00731"></a>00731 <span class="keywordtype">size_t</span> hlen = strlen(realm) + strlen(<span class="stringliteral">"Basic realm=\"\""</span>);
<a name="l00732"></a>00732 <span class="keywordtype">char</span> header[hlen + 1];
<a name="l00733"></a>00733
<a name="l00734"></a>00734 <span class="keywordflow">if</span> (hlen !=
<a name="l00735"></a>00735 snprintf(header,
<a name="l00736"></a>00736 hlen + 1,
<a name="l00737"></a>00737 <span class="stringliteral">"Basic realm=\"%s\""</span>,
<a name="l00738"></a>00738 realm))
<a name="l00739"></a>00739 {
<a name="l00740"></a>00740 <a class="code" href="../../db/dde/internal_8h.html#afade656687a6411b222b89fd59ddbafb">EXTRA_CHECK</a> (0);
<a name="l00741"></a>00741 <span class="keywordflow">return</span> MHD_NO;
<a name="l00742"></a>00742 }
<a name="l00743"></a>00743 ret = <a class="code" href="../../dc/d0c/microhttpd_8h.html#a2091d2691bb976dc32606f6a2ead60bb">MHD_add_response_header</a>(response,
<a name="l00744"></a>00744 <a class="code" href="../../dc/d0c/microhttpd_8h.html#ad2f35dc8bf2ad4a675c9104e6cd97d55">MHD_HTTP_HEADER_WWW_AUTHENTICATE</a>,
<a name="l00745"></a>00745 header);
<a name="l00746"></a>00746 <span class="keywordflow">if</span> (<a class="code" href="../../dc/d0c/microhttpd_8h.html#a802c6784232db3736734807f2fb54e5c">MHD_YES</a> == ret)
<a name="l00747"></a>00747 ret = <a class="code" href="../../dc/d0c/microhttpd_8h.html#aa0ee587cdd6d860add50dbeb62a81fe1">MHD_queue_response</a>(connection,
<a name="l00748"></a>00748 <a class="code" href="../../dc/d0c/microhttpd_8h.html#a8d6ffe91a95aae60f81c49a272b5d4de">MHD_HTTP_UNAUTHORIZED</a>,
<a name="l00749"></a>00749 response);
<a name="l00750"></a>00750 <span class="keywordflow">return</span> ret;
<a name="l00751"></a>00751 }
<a name="l00752"></a>00752
<a name="l00753"></a>00753 <span class="comment">/* end of digestauth.c */</span>
</pre></div></div>
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