asn_8h-source.html

Crypto++是一个非常强大的密码学库,主要是功能全

00234         <span class="keyword">virtual</span> <span class="keywordtype">bool</span> BERDecodeAlgorithmParameters(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &amp;bt)
00235                 {BERDecodeNull(bt); <span class="keywordflow">return</span> <span class="keyword">false</span>;}
00236         <span class="keyword">virtual</span> <span class="keywordtype">bool</span> DEREncodeAlgorithmParameters(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &amp;bt)<span class="keyword"> const</span>
00237 <span class="keyword">                </span>{DEREncodeNull(bt); <span class="keywordflow">return</span> <span class="keyword">false</span>;}      <span class="comment">// see RFC 2459, section 7.3.1</span>
00238         <span class="comment">// one of the following two should be overriden</span>
00239         <span class="keyword">virtual</span> <span class="keywordtype">void</span> BERDecodeKey(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &amp;bt) {assert(<span class="keyword">false</span>);}
00240         <span class="keyword">virtual</span> <span class="keywordtype">void</span> BERDecodeKey2(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &amp;bt, <span class="keywordtype">bool</span> parametersPresent, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> size)
00241                 {BERDecodeKey(bt);}
00242         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DEREncodeKey(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &amp;bt) <span class="keyword">const</span> =0;
00243 };
00244 <span class="comment"></span>
00245 <span class="comment">//! .</span>
<a name="l00246"></a><a class="code" href="class_x509_public_key.html">00246</a> <span class="comment"></span><span class="keyword">class </span>CRYPTOPP_DLL X509PublicKey : <span class="keyword">virtual</span> <span class="keyword">public</span> ASN1Key, <span class="keyword">public</span> <a class="code" href="class_public_key.html">PublicKey</a>
00247 {
00248 <span class="keyword">public</span>:
00249         <span class="keywordtype">void</span> <a class="code" href="class_a_s_n1_object.html#_a_s_n1_objecta1">BERDecode</a>(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &amp;bt);
00250         <span class="keywordtype">void</span> <a class="code" href="class_a_s_n1_object.html#_a_s_n1_objecta2">DEREncode</a>(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &amp;bt) <span class="keyword">const</span>;
00251 };
00252 <span class="comment"></span>
00253 <span class="comment">//! .</span>
<a name="l00254"></a><a class="code" href="class_p_k_c_s8_private_key.html">00254</a> <span class="comment"></span><span class="keyword">class </span>CRYPTOPP_DLL PKCS8PrivateKey : <span class="keyword">virtual</span> <span class="keyword">public</span> ASN1Key, <span class="keyword">public</span> <a class="code" href="class_private_key.html">PrivateKey</a>
00255 {
00256 <span class="keyword">public</span>:
00257         <span class="keywordtype">void</span> <a class="code" href="class_a_s_n1_object.html#_a_s_n1_objecta1">BERDecode</a>(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &amp;bt);
00258         <span class="keywordtype">void</span> <a class="code" href="class_a_s_n1_object.html#_a_s_n1_objecta2">DEREncode</a>(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &amp;bt) <span class="keyword">const</span>;
00259 
00260         <span class="keyword">virtual</span> <span class="keywordtype">void</span> BERDecodeOptionalAttributes(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &amp;bt)
00261                 {}      <span class="comment">// TODO: skip optional attributes if present</span>
00262         <span class="keyword">virtual</span> <span class="keywordtype">void</span> DEREncodeOptionalAttributes(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &amp;bt)<span class="keyword"> const</span>
00263 <span class="keyword">                </span>{}
00264 };
00265 
00266 <span class="comment">// ********************************************************</span>
00267 <span class="comment"></span>
00268 <span class="comment">//! DER Encode Unsigned</span>
00269 <span class="comment"></span><span class="comment">/*! for INTEGER, BOOLEAN, and ENUM */</span>
00270 <span class="keyword">template</span> &lt;<span class="keyword">class</span> T&gt;
00271 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> DEREncodeUnsigned(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &amp;out, T w, byte asnTag = INTEGER)
00272 {
00273         byte buf[<span class="keyword">sizeof</span>(w)+1];
00274         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> bc;
00275         <span class="keywordflow">if</span> (asnTag == BOOLEAN)
00276         {
00277                 buf[<span class="keyword">sizeof</span>(w)] = w ? 0xff : 0;
00278                 bc = 1;
00279         }
00280         <span class="keywordflow">else</span>
00281         {
00282                 buf[0] = 0;
00283                 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i&lt;<span class="keyword">sizeof</span>(w); i++)
00284                         buf[i+1] = byte(w &gt;&gt; (<span class="keyword">sizeof</span>(w)-1-i)*8);
00285                 bc = <span class="keyword">sizeof</span>(w);
00286                 <span class="keywordflow">while</span> (bc &gt; 1 &amp;&amp; buf[<span class="keyword">sizeof</span>(w)+1-bc] == 0)
00287                         --bc;
00288                 <span class="keywordflow">if</span> (buf[<span class="keyword">sizeof</span>(w)+1-bc] &amp; 0x80)
00289                         ++bc;
00290         }
00291         out.<a class="code" href="class_buffered_transformation.html#_zlib_decompressorz1_0">Put</a>(asnTag);
00292         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> lengthBytes = DERLengthEncode(out, bc);
00293         out.<a class="code" href="class_buffered_transformation.html#_zlib_decompressorz1_0">Put</a>(buf+<span class="keyword">sizeof</span>(w)+1-bc, bc);
00294         <span class="keywordflow">return</span> 1+lengthBytes+bc;
00295 }
00296 <span class="comment"></span>
00297 <span class="comment">//! BER Decode Unsigned</span>
00298 <span class="comment"></span><span class="comment">// VC60 workaround: std::numeric_limits&lt;T&gt;::max conflicts with MFC max macro</span>
00299 <span class="comment">// CW41 workaround: std::numeric_limits&lt;T&gt;::max causes a template error</span>
00300 <span class="keyword">template</span> &lt;<span class="keyword">class</span> T&gt;
00301 <span class="keywordtype">void</span> BERDecodeUnsigned(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &amp;in, T &amp;w, byte asnTag = INTEGER,
00302                                            T minValue = 0, T maxValue = 0xffffffff)
00303 {
00304         byte b;
00305         <span class="keywordflow">if</span> (!in.<a class="code" href="class_buffered_transformation.html#_zlib_decompressorz7_2">Get</a>(b) || b != asnTag)
00306                 BERDecodeError();
00307 
00308         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> bc;
00309         BERLengthDecode(in, bc);
00310 
00311         <a class="code" href="class_sec_block.html">SecByteBlock</a> buf(bc);
00312 
00313         <span class="keywordflow">if</span> (bc != in.<a class="code" href="class_buffered_transformation.html#_zlib_decompressorz7_2">Get</a>(buf, bc))
00314                 BERDecodeError();
00315 
00316         <span class="keyword">const</span> byte *ptr = buf;
00317         <span class="keywordflow">while</span> (bc &gt; <span class="keyword">sizeof</span>(w) &amp;&amp; *ptr == 0)
00318         {
00319                 bc--;
00320                 ptr++;
00321         }
00322         <span class="keywordflow">if</span> (bc &gt; <span class="keyword">sizeof</span>(w))
00323                 BERDecodeError();
00324 
00325         w = 0;
00326         <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i&lt;bc; i++)
00327                 w = (w &lt;&lt; 8) | ptr[i];
00328 
00329         <span class="keywordflow">if</span> (w &lt; minValue || w &gt; maxValue)
00330                 BERDecodeError();
00331 }
00332 
00333 <span class="keyword">inline</span> <span class="keywordtype">bool</span> operator==(<span class="keyword">const</span> ::CryptoPP::OID &amp;lhs, <span class="keyword">const</span> ::CryptoPP::OID &amp;rhs)
00334         {<span class="keywordflow">return</span> lhs.m_values == rhs.m_values;}
00335 <span class="keyword">inline</span> <span class="keywordtype">bool</span> operator!=(<span class="keyword">const</span> ::CryptoPP::OID &amp;lhs, <span class="keyword">const</span> ::CryptoPP::OID &amp;rhs)
00336         {<span class="keywordflow">return</span> lhs.m_values != rhs.m_values;}
00337 <span class="keyword">inline</span> <span class="keywordtype">bool</span> operator&lt;(<span class="keyword">const</span> ::CryptoPP::OID &amp;lhs, <span class="keyword">const</span> ::CryptoPP::OID &amp;rhs)
00338         {<span class="keywordflow">return</span> std::lexicographical_compare(lhs.m_values.begin(), lhs.m_values.end(), rhs.m_values.begin(), rhs.m_values.end());}
00339 inline ::CryptoPP::OID operator+(<span class="keyword">const</span> ::CryptoPP::OID &amp;lhs, <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> rhs)
00340         {return ::CryptoPP::OID(lhs)+=rhs;}
00341 
00342 NAMESPACE_END
00343 
00344 <span class="preprocessor">#endif</span>
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Tue Jul 8 23:34:08 2003 for Crypto++ by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border=0 > 
</a>1.3.2 </small></address>
</body>
</html>