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<h1>KeySteward.cc</h1><a href="KeySteward_8cc.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"> * Copyright 2006 SPARTA Inc</span>
<a name="l00003"></a>00003 <span class="comment"> * </span>
<a name="l00004"></a>00004 <span class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</span>
<a name="l00005"></a>00005 <span class="comment"> * you may not use this file except in compliance with the License.</span>
<a name="l00006"></a>00006 <span class="comment"> * You may obtain a copy of the License at</span>
<a name="l00007"></a>00007 <span class="comment"> * </span>
<a name="l00008"></a>00008 <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span>
<a name="l00009"></a>00009 <span class="comment"> * </span>
<a name="l00010"></a>00010 <span class="comment"> * Unless required by applicable law or agreed to in writing, software</span>
<a name="l00011"></a>00011 <span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span>
<a name="l00012"></a>00012 <span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<a name="l00013"></a>00013 <span class="comment"> * See the License for the specific language governing permissions and</span>
<a name="l00014"></a>00014 <span class="comment"> * limitations under the License.</span>
<a name="l00015"></a>00015 <span class="comment"> */</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="comment">/********************************************************************************</span>
<a name="l00020"></a>00020 <span class="comment"> * *</span>
<a name="l00021"></a>00021 <span class="comment"> * *** WARNING *** *</span>
<a name="l00022"></a>00022 <span class="comment"> * *</span>
<a name="l00023"></a>00023 <span class="comment"> * This is an interface example ONLY. It does NOT do any key stewardship *</span>
<a name="l00024"></a>00024 <span class="comment"> * but merely packages the key so it can be recovered later. *</span>
<a name="l00025"></a>00025 <span class="comment"> * *</span>
<a name="l00026"></a>00026 <span class="comment"> * Implementations must provide their own security management for keys. *</span>
<a name="l00027"></a>00027 <span class="comment"> * *</span>
<a name="l00028"></a>00028 <span class="comment"> * *</span>
<a name="l00029"></a>00029 <span class="comment"> ********************************************************************************/</span>
<a name="l00030"></a>00030
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00033"></a>00033 <span class="preprocessor"></span><span class="preprocessor"># include <<a class="code" href="dtn-config_8h.html">dtn-config.h</a>></span>
<a name="l00034"></a>00034 <span class="preprocessor">#endif</span>
<a name="l00035"></a>00035 <span class="preprocessor"></span>
<a name="l00036"></a>00036 <span class="preprocessor">#ifdef BSP_ENABLED</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span>
<a name="l00038"></a>00038 <span class="preprocessor">#include "<a class="code" href="Ciphersuite_8h.html">Ciphersuite.h</a>"</span>
<a name="l00039"></a>00039 <span class="preprocessor">#include "<a class="code" href="bundling_2Bundle_8h.html">bundling/Bundle.h</a>"</span>
<a name="l00040"></a>00040 <span class="preprocessor">#include "<a class="code" href="contacts_2Link_8h.html">contacts/Link.h</a>"</span>
<a name="l00041"></a>00041 <span class="preprocessor">#include "<a class="code" href="KeySteward_8h.html">security/KeySteward.h</a>"</span>
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="keyword">namespace </span>dtn {
<a name="l00044"></a>00044
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00047"></a>00047 <span class="keywordtype">int</span>
<a name="l00048"></a>00048 KeySteward::encrypt(<span class="keyword">const</span> Bundle* b,
<a name="l00049"></a>00049 KeyParameterInfo* kpi,
<a name="l00050"></a>00050 <span class="keyword">const</span> <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>& link,
<a name="l00051"></a>00051 std::string security_dest,
<a name="l00052"></a>00052 u_char* data,
<a name="l00053"></a>00053 <span class="keywordtype">size_t</span> data_len,
<a name="l00054"></a>00054 DataBuffer& db)
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056 (void) b;
<a name="l00057"></a>00057 (void) kpi;
<a name="l00058"></a>00058 (void) link;
<a name="l00059"></a>00059 (void) security_dest;
<a name="l00060"></a>00060
<a name="l00061"></a>00061 u_char* <a class="code" href="num2sdnv_8c.html#a81cdcc7ff6987bc85c073253e32715f">buf</a>;
<a name="l00062"></a>00062 u_int16_t <a class="code" href="num2sdnv_8c.html#fed088663f8704004425cdae2120b9b3">len</a>;
<a name="l00063"></a>00063 <span class="keywordtype">size_t</span> size;
<a name="l00064"></a>00064
<a name="l00065"></a>00065 <span class="keywordflow">if</span> ( data_len > USHRT_MAX )
<a name="l00066"></a>00066 <span class="keywordflow">return</span> -1;
<a name="l00067"></a>00067
<a name="l00068"></a>00068 len = data_len;
<a name="l00069"></a>00069 len = htons(len);
<a name="l00070"></a>00070 size = std::max( static_cast<unsigned long>(data_len + <span class="keyword">sizeof</span>(len)), 512UL );
<a name="l00071"></a>00071 db.reserve(size);
<a name="l00072"></a>00072 db.set_len(size);
<a name="l00073"></a>00073 buf = db.buf();
<a name="l00074"></a>00074 memcpy(buf, &len, <span class="keyword">sizeof</span>(len));
<a name="l00075"></a>00075 buf += <span class="keyword">sizeof</span>(len);
<a name="l00076"></a>00076 memcpy(buf, data, data_len);
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="keywordflow">return</span> 0;
<a name="l00079"></a>00079 }
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00082"></a>00082 <span class="keywordtype">int</span>
<a name="l00083"></a>00083 KeySteward::decrypt(<span class="keyword">const</span> Bundle* b,
<a name="l00084"></a>00084 std::string security_src,
<a name="l00085"></a>00085 u_char* enc_data,
<a name="l00086"></a>00086 <span class="keywordtype">size_t</span> enc_data_len,
<a name="l00087"></a>00087 DataBuffer& db)
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 (void) b;
<a name="l00090"></a>00090 (void) security_src;
<a name="l00091"></a>00091
<a name="l00092"></a>00092 u_int16_t len;
<a name="l00093"></a>00093 u_char* buf = enc_data;
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="keywordflow">if</span> (enc_data_len < 2)
<a name="l00096"></a>00096 <span class="keywordflow">return</span> -1;
<a name="l00097"></a>00097
<a name="l00098"></a>00098 memcpy(&len, buf, <span class="keyword">sizeof</span>(len));
<a name="l00099"></a>00099 buf += <span class="keyword">sizeof</span>(len);
<a name="l00100"></a>00100
<a name="l00101"></a>00101 len = ntohs(len);
<a name="l00102"></a>00102 <span class="keywordflow">if</span> ( enc_data_len < len + <span class="keyword">sizeof</span>(len) )
<a name="l00103"></a>00103 <span class="keywordflow">return</span> -1;
<a name="l00104"></a>00104
<a name="l00105"></a>00105 db.reserve(len);
<a name="l00106"></a>00106 db.set_len(len);
<a name="l00107"></a>00107 memcpy(db.buf(), buf, len);
<a name="l00108"></a>00108
<a name="l00109"></a>00109 <span class="keywordflow">return</span> 0;
<a name="l00110"></a>00110 }
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00113"></a>00113 <span class="keywordtype">int</span>
<a name="l00114"></a>00114 KeySteward::sign(<span class="keyword">const</span> Bundle* b,
<a name="l00115"></a>00115 KeyParameterInfo* kpi,
<a name="l00116"></a>00116 <span class="keyword">const</span> <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>& link,
<a name="l00117"></a>00117 u_char* data,
<a name="l00118"></a>00118 <span class="keywordtype">size_t</span> data_len,
<a name="l00119"></a>00119 DataBuffer& db)
<a name="l00120"></a>00120 {
<a name="l00121"></a>00121 (void) b;
<a name="l00122"></a>00122 (void) kpi;
<a name="l00123"></a>00123 (void) link;
<a name="l00124"></a>00124 (void) data;
<a name="l00125"></a>00125 (void) data_len;
<a name="l00126"></a>00126 (void) db;
<a name="l00127"></a>00127
<a name="l00128"></a>00128 u_char* buf;
<a name="l00129"></a>00129 u_int16_t len;
<a name="l00130"></a>00130 <span class="keywordtype">size_t</span> size;
<a name="l00131"></a>00131
<a name="l00132"></a>00132 <span class="keywordflow">if</span> ( data_len > USHRT_MAX )
<a name="l00133"></a>00133 <span class="keywordflow">return</span> -1;
<a name="l00134"></a>00134
<a name="l00135"></a>00135 len = data_len;
<a name="l00136"></a>00136 len = htons(len);
<a name="l00137"></a>00137 size = std::max( static_cast<unsigned long>(data_len + <span class="keyword">sizeof</span>(len)), 512UL );
<a name="l00138"></a>00138 db.reserve(size);
<a name="l00139"></a>00139 db.set_len(size);
<a name="l00140"></a>00140 buf = db.buf();
<a name="l00141"></a>00141 memcpy(buf, &len, <span class="keyword">sizeof</span>(len));
<a name="l00142"></a>00142 buf += <span class="keyword">sizeof</span>(len);
<a name="l00143"></a>00143 memcpy(buf, data, data_len);
<a name="l00144"></a>00144
<a name="l00145"></a>00145 <span class="keywordflow">return</span> 0;
<a name="l00146"></a>00146 }
<a name="l00147"></a>00147
<a name="l00148"></a>00148 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00149"></a>00149 <span class="keywordtype">int</span>
<a name="l00150"></a>00150 KeySteward::signature_length(<span class="keyword">const</span> Bundle* b,
<a name="l00151"></a>00151 KeyParameterInfo* kpi,
<a name="l00152"></a>00152 <span class="keyword">const</span> <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>& link,
<a name="l00153"></a>00153 <span class="keywordtype">size_t</span> data_len,
<a name="l00154"></a>00154 <span class="keywordtype">size_t</span>& out_len)
<a name="l00155"></a>00155 {
<a name="l00156"></a>00156 (void) b;
<a name="l00157"></a>00157 (void) kpi;
<a name="l00158"></a>00158 (void) link;
<a name="l00159"></a>00159 (void) data_len;
<a name="l00160"></a>00160
<a name="l00161"></a>00161 out_len = 512;
<a name="l00162"></a>00162
<a name="l00163"></a>00163 <span class="keywordflow">return</span> 0;
<a name="l00164"></a>00164 }
<a name="l00165"></a>00165
<a name="l00166"></a>00166 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00167"></a>00167 <span class="keywordtype">int</span>
<a name="l00168"></a>00168 KeySteward::verify(<span class="keyword">const</span> Bundle* b,
<a name="l00169"></a>00169 u_char* enc_data,
<a name="l00170"></a>00170 <span class="keywordtype">size_t</span> enc_data_len,
<a name="l00171"></a>00171 u_char* data,
<a name="l00172"></a>00172 <span class="keywordtype">size_t</span> data_len)
<a name="l00173"></a>00173 {
<a name="l00174"></a>00174 (void) b;
<a name="l00175"></a>00175 (void) enc_data;
<a name="l00176"></a>00176 (void) enc_data_len;
<a name="l00177"></a>00177
<a name="l00178"></a>00178 u_int16_t len;
<a name="l00179"></a>00179 u_char* buf = enc_data;
<a name="l00180"></a>00180
<a name="l00181"></a>00181 <span class="keywordflow">if</span> (enc_data_len < 2)
<a name="l00182"></a>00182 <span class="keywordflow">return</span> -1;
<a name="l00183"></a>00183
<a name="l00184"></a>00184 memcpy(&len, buf, <span class="keyword">sizeof</span>(len));
<a name="l00185"></a>00185 buf += <span class="keyword">sizeof</span>(len);
<a name="l00186"></a>00186
<a name="l00187"></a>00187 len = ntohs(len);
<a name="l00188"></a>00188 <span class="keywordflow">if</span> ( enc_data_len < len + <span class="keyword">sizeof</span>(len) )
<a name="l00189"></a>00189 <span class="keywordflow">return</span> -1;
<a name="l00190"></a>00190
<a name="l00191"></a>00191 <span class="keywordflow">if</span> ( len != data_len )
<a name="l00192"></a>00192 <span class="keywordflow">return</span> -1;
<a name="l00193"></a>00193
<a name="l00194"></a>00194 <span class="keywordflow">if</span> ( memcmp( buf, data, len ) != 0 )
<a name="l00195"></a>00195 <span class="keywordflow">return</span> -1;
<a name="l00196"></a>00196
<a name="l00197"></a>00197 <span class="keywordflow">return</span> 0;
<a name="l00198"></a>00198 }
<a name="l00199"></a>00199
<a name="l00200"></a>00200 } <span class="comment">// namespace dtn</span>
<a name="l00201"></a>00201
<a name="l00202"></a>00202 <span class="preprocessor">#endif </span><span class="comment">/* BSP_ENABLED */</span>
</pre></div></div>
<hr size="1"><address style="text-align: right;"><small>Generated on Fri Jan 30 09:26:57 2009 for DTN Reference Implementation by
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distrib
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Mandriva
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2010.0
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