filters_8h-source.html

Crypto++是一个非常强大的密码学库,主要是功能全

00214         FilterWithInputQueue(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> *attachment) : Filter(attachment) {}
<a name="l00215"></a><a class="code" href="class_filter_with_input_queue.html#_filter_with_input_queuea1">00215</a>         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_buffered_transformation.html#_unflushable_3_01_sink_01_4z1_9">Put2</a>(<span class="keyword">const</span> byte *inString, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length, <span class="keywordtype">int</span> messageEnd, <span class="keywordtype">bool</span> blocking)
00216         {
00217                 <span class="keywordflow">if</span> (!blocking)
00218                         <span class="keywordflow">throw</span> BlockingInputOnly(<span class="stringliteral">"FilterWithInputQueue"</span>);
00219                 
00220                 m_inQueue.Put(inString, length);
00221                 <span class="keywordflow">if</span> (messageEnd)
00222                 {
00223                         IsolatedMessageEnd(blocking);
00224                         Output(0, NULL, 0, messageEnd, blocking);
00225                 }
00226                 <span class="keywordflow">return</span> 0;
00227         }
00228 
00229 <span class="keyword">protected</span>:
00230         <span class="keyword">virtual</span> <span class="keywordtype">bool</span> IsolatedMessageEnd(<span class="keywordtype">bool</span> blocking) =0;
00231         <span class="keywordtype">void</span> IsolatedInitialize(<span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html">NameValuePairs</a> &amp;parameters) {m_inQueue.Clear();}
00232 
00233         <a class="code" href="class_byte_queue.html">ByteQueue</a> m_inQueue;
00234 };
00235 <span class="comment"></span>
00236 <span class="comment">//! Filter Wrapper for StreamTransformation</span>
<a name="l00237"></a><a class="code" href="class_stream_transformation_filter.html">00237</a> <span class="comment"></span><span class="keyword">class </span>CRYPTOPP_DLL StreamTransformationFilter : <span class="keyword">public</span> FilterWithBufferedInput, <span class="keyword">private</span> FilterPutSpaceHelper
00238 {
00239 <span class="keyword">public</span>:
00240         <span class="keyword">enum</span> BlockPaddingScheme {NO_PADDING, ZEROS_PADDING, PKCS_PADDING, ONE_AND_ZEROS_PADDING, DEFAULT_PADDING};<span class="comment"></span>
00241 <span class="comment">        /*! DEFAULT_PADDING means PKCS_PADDING if c.MandatoryBlockSize() &gt; 1 &amp;&amp; c.MinLastBlockSize() == 0 (e.g. ECB or CBC mode),</span>
00242 <span class="comment">                otherwise NO_PADDING (OFB, CFB, CTR, CBC-CTS modes) */</span>
00243         StreamTransformationFilter(<a class="code" href="class_stream_transformation.html">StreamTransformation</a> &amp;c, <a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> *attachment = NULL, BlockPaddingScheme padding = DEFAULT_PADDING);
00244 
00245         <span class="keywordtype">void</span> FirstPut(<span class="keyword">const</span> byte *inString);
00246         <span class="keywordtype">void</span> NextPutMultiple(<span class="keyword">const</span> byte *inString, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length);
00247         <span class="keywordtype">void</span> NextPutModifiable(byte *inString, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length);
00248         <span class="keywordtype">void</span> LastPut(<span class="keyword">const</span> byte *inString, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length);
00249 <span class="comment">//      byte * CreatePutSpace(unsigned int &amp;size);</span>
00250 
00251 <span class="keyword">protected</span>:
00252         <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> LastBlockSize(<a class="code" href="class_stream_transformation.html">StreamTransformation</a> &amp;c, BlockPaddingScheme padding);
00253 
00254         <a class="code" href="class_stream_transformation.html">StreamTransformation</a> &amp;m_cipher;
00255         BlockPaddingScheme m_padding;
00256         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> m_optimalBufferSize;
00257 };
00258 
00259 <span class="preprocessor">#ifdef CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY</span>
00260 <span class="preprocessor"></span><span class="keyword">typedef</span> StreamTransformationFilter StreamCipherFilter;
00261 <span class="preprocessor">#endif</span>
00262 <span class="preprocessor"></span><span class="comment"></span>
00263 <span class="comment">//! Filter Wrapper for HashTransformation</span>
<a name="l00264"></a><a class="code" href="class_hash_filter.html">00264</a> <span class="comment"></span><span class="keyword">class </span>CRYPTOPP_DLL HashFilter : <span class="keyword">public</span> Bufferless&lt;Filter&gt;, <span class="keyword">private</span> FilterPutSpaceHelper
00265 {
00266 <span class="keyword">public</span>:
00267         HashFilter(<a class="code" href="class_hash_transformation.html">HashTransformation</a> &amp;hm, <a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> *attachment = NULL, <span class="keywordtype">bool</span> putMessage=<span class="keyword">false</span>)
00268                 : Bufferless&lt;Filter&gt;(attachment), m_hashModule(hm), m_putMessage(putMessage) {}
00269 
00270         <span class="keywordtype">void</span> IsolatedInitialize(<span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html">NameValuePairs</a> &amp;parameters);
00271         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> Put2(<span class="keyword">const</span> byte *begin, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length, <span class="keywordtype">int</span> messageEnd, <span class="keywordtype">bool</span> blocking);
00272 
<a name="l00273"></a><a class="code" href="class_hash_filter.html#_hash_filtera3">00273</a>         byte * CreatePutSpace(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> &amp;size) {<span class="keywordflow">return</span> m_hashModule.CreateUpdateSpace(size);}
00274 
00275 <span class="keyword">private</span>:
00276         <a class="code" href="class_hash_transformation.html">HashTransformation</a> &amp;m_hashModule;
00277         <span class="keywordtype">bool</span> m_putMessage;
00278         byte *m_space;
00279 };
00280 <span class="comment"></span>
00281 <span class="comment">//! Filter Wrapper for HashTransformation</span>
<a name="l00282"></a><a class="code" href="class_hash_verification_filter.html">00282</a> <span class="comment"></span><span class="keyword">class </span>CRYPTOPP_DLL HashVerificationFilter : <span class="keyword">public</span> FilterWithBufferedInput
00283 {
00284 <span class="keyword">public</span>:
00285         <span class="keyword">class </span>HashVerificationFailed : <span class="keyword">public</span> <a class="code" href="class_exception.html">Exception</a>
00286         {
00287         <span class="keyword">public</span>:
00288                 HashVerificationFailed()
00289                         : <a class="code" href="class_exception.html">Exception</a>(DATA_INTEGRITY_CHECK_FAILED, <span class="stringliteral">"HashVerifier: message hash not valid"</span>) {}
00290         };
00291 
00292         <span class="keyword">enum</span> Flags {HASH_AT_BEGIN=1, PUT_MESSAGE=2, PUT_HASH=4, PUT_RESULT=8, THROW_EXCEPTION=16, DEFAULT_FLAGS = HASH_AT_BEGIN | PUT_RESULT};
00293         HashVerificationFilter(<a class="code" href="class_hash_transformation.html">HashTransformation</a> &amp;hm, <a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> *attachment = NULL, word32 flags = DEFAULT_FLAGS);
00294 
00295         <span class="keywordtype">bool</span> GetLastResult()<span class="keyword"> const </span>{<span class="keywordflow">return</span> m_verified;}
00296 
00297 <span class="keyword">protected</span>:
00298         <span class="keywordtype">void</span> InitializeDerivedAndReturnNewSizes(<span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html">NameValuePairs</a> &amp;parameters, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> &amp;firstSize, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> &amp;blockSize, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> &amp;lastSize);
00299         <span class="keywordtype">void</span> FirstPut(<span class="keyword">const</span> byte *inString);
00300         <span class="keywordtype">void</span> NextPutMultiple(<span class="keyword">const</span> byte *inString, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length);
00301         <span class="keywordtype">void</span> LastPut(<span class="keyword">const</span> byte *inString, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length);
00302 
00303 <span class="keyword">private</span>:
00304         <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> FirstSize(word32 flags, <a class="code" href="class_hash_transformation.html">HashTransformation</a> &amp;hm) {<span class="keywordflow">return</span> flags &amp; HASH_AT_BEGIN ? hm.<a class="code" href="class_hash_transformation.html#_x_m_a_c_ca9">DigestSize</a>() : 0;}
00305         <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> LastSize(word32 flags, <a class="code" href="class_hash_transformation.html">HashTransformation</a> &amp;hm) {<span class="keywordflow">return</span> flags &amp; HASH_AT_BEGIN ? 0 : hm.<a class="code" href="class_hash_transformation.html#_x_m_a_c_ca9">DigestSize</a>();}
00306 
00307         <a class="code" href="class_hash_transformation.html">HashTransformation</a> &amp;m_hashModule;
00308         word32 m_flags;
00309         <a class="code" href="class_sec_block.html">SecByteBlock</a> m_expectedHash;
00310         <span class="keywordtype">bool</span> m_verified;
00311 };
00312 
00313 <span class="keyword">typedef</span> HashVerificationFilter <a class="code" href="class_hash_verification_filter.html">HashVerifier</a>;    <span class="comment">// for backwards compatibility</span>
00314 <span class="comment"></span>
00315 <span class="comment">//! Filter Wrapper for PK_Signer</span>
<a name="l00316"></a><a class="code" href="class_signer_filter.html">00316</a> <span class="comment"></span><span class="keyword">class </span>CRYPTOPP_DLL SignerFilter : <span class="keyword">public</span> Unflushable&lt;Filter&gt;
00317 {
00318 <span class="keyword">public</span>:
00319         SignerFilter(<a class="code" href="class_random_number_generator.html">RandomNumberGenerator</a> &amp;rng, <span class="keyword">const</span> <a class="code" href="class_p_k___signer.html">PK_Signer</a> &amp;signer, <a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> *attachment = NULL, <span class="keywordtype">bool</span> putMessage=<span class="keyword">false</span>)
00320                 : Unflushable&lt;Filter&gt;(attachment), m_rng(rng), m_signer(signer), m_messageAccumulator(signer.<a class="code" href="class_p_k___signer.html#_signer_with_recovery_templatea12">NewSignatureAccumulator</a>()), m_putMessage(putMessage) {}
00321 
00322         <span class="keywordtype">void</span> IsolatedInitialize(<span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html">NameValuePairs</a> &amp;parameters);
00323         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> Put2(<span class="keyword">const</span> byte *begin, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length, <span class="keywordtype">int</span> messageEnd, <span class="keywordtype">bool</span> blocking);