filters_8cpp-source.html

Crypto++是一个非常强大的密码学库,主要是功能全

00642         {
00643                 {
00644                         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> size, digestSize = m_hashModule.<a class="code" href="class_hash_transformation.html#_x_m_a_c_ca9">DigestSize</a>();
00645                         m_space = HelpCreatePutSpace(*<a class="code" href="class_filter.html#_zlib_decompressora8">AttachedTransformation</a>(), NULL_CHANNEL, digestSize, digestSize, size = digestSize);
00646                         m_hashModule.<a class="code" href="class_hash_transformation.html#_x_m_a_c_c___basea13">Final</a>(m_space);
00647                 }
00648                 FILTER_OUTPUT(2, m_space, m_hashModule.<a class="code" href="class_hash_transformation.html#_x_m_a_c_ca9">DigestSize</a>(), messageEnd);
00649         }
00650         FILTER_END_NO_MESSAGE_END;
00651 }
00652 
00653 <span class="comment">// *************************************************************</span>
00654 
00655 HashVerificationFilter::HashVerificationFilter(<a class="code" href="class_hash_transformation.html">HashTransformation</a> &amp;hm, <a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> *attachment, word32 flags)
00656         : <a class="code" href="class_filter_with_buffered_input.html">FilterWithBufferedInput</a>(attachment)
00657         , m_hashModule(hm)
00658 {
00659         IsolatedInitialize(MakeParameters(Name::HashVerificationFilterFlags(), flags));
00660 }
00661 
00662 <span class="keywordtype">void</span> HashVerificationFilter::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)
00663 {
00664         m_flags = parameters.<a class="code" href="class_name_value_pairs.html#_x_t_r___d_ha40">GetValueWithDefault</a>(Name::HashVerificationFilterFlags(), (word32)DEFAULT_FLAGS);
00665         m_hashModule.<a class="code" href="class_hash_transformation.html#_x_m_a_c_ca8">Restart</a>();
00666         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> size = m_hashModule.<a class="code" href="class_hash_transformation.html#_x_m_a_c_ca9">DigestSize</a>();
00667         m_verified = <span class="keyword">false</span>;
00668         firstSize = m_flags &amp; HASH_AT_BEGIN ? size : 0;
00669         blockSize = 1;
00670         lastSize = m_flags &amp; HASH_AT_BEGIN ? 0 : size;
00671 }
00672 
00673 <span class="keywordtype">void</span> HashVerificationFilter::FirstPut(<span class="keyword">const</span> byte *inString)
00674 {
00675         <span class="keywordflow">if</span> (m_flags &amp; HASH_AT_BEGIN)
00676         {
00677                 m_expectedHash.<a class="code" href="class_sec_block.html#_sec_block_with_hinta19">New</a>(m_hashModule.<a class="code" href="class_hash_transformation.html#_x_m_a_c_ca9">DigestSize</a>());
00678                 memcpy(m_expectedHash, inString, m_expectedHash.<a class="code" href="class_sec_block.html#_sec_block_with_hinta13">size</a>());
00679                 <span class="keywordflow">if</span> (m_flags &amp; PUT_HASH)
00680                         <a class="code" href="class_filter.html#_zlib_decompressora8">AttachedTransformation</a>()-&gt;<a class="code" href="class_buffered_transformation.html#_zlib_decompressorz1_0">Put</a>(inString, m_expectedHash.<a class="code" href="class_sec_block.html#_sec_block_with_hinta13">size</a>());
00681         }
00682 }
00683 
00684 <span class="keywordtype">void</span> HashVerificationFilter::NextPutMultiple(<span class="keyword">const</span> byte *inString, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length)
00685 {
00686         m_hashModule.<a class="code" href="class_hash_transformation.html#_x_m_a_c_ca5">Update</a>(inString, length);
00687         <span class="keywordflow">if</span> (m_flags &amp; PUT_MESSAGE)
00688                 <a class="code" href="class_filter.html#_zlib_decompressora8">AttachedTransformation</a>()-&gt;<a class="code" href="class_buffered_transformation.html#_zlib_decompressorz1_0">Put</a>(inString, length);
00689 }
00690 
00691 <span class="keywordtype">void</span> HashVerificationFilter::LastPut(<span class="keyword">const</span> byte *inString, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length)
00692 {
00693         <span class="keywordflow">if</span> (m_flags &amp; HASH_AT_BEGIN)
00694         {
00695                 assert(length == 0);
00696                 m_verified = m_hashModule.<a class="code" href="class_hash_transformation.html#_x_m_a_c_c___basea15">Verify</a>(m_expectedHash);
00697         }
00698         <span class="keywordflow">else</span>
00699         {
00700                 m_verified = (length==m_hashModule.<a class="code" href="class_hash_transformation.html#_x_m_a_c_ca9">DigestSize</a>() &amp;&amp; m_hashModule.<a class="code" href="class_hash_transformation.html#_x_m_a_c_c___basea15">Verify</a>(inString));
00701                 <span class="keywordflow">if</span> (m_flags &amp; PUT_HASH)
00702                         <a class="code" href="class_filter.html#_zlib_decompressora8">AttachedTransformation</a>()-&gt;<a class="code" href="class_buffered_transformation.html#_zlib_decompressorz1_0">Put</a>(inString, length);
00703         }
00704 
00705         <span class="keywordflow">if</span> (m_flags &amp; PUT_RESULT)
00706                 <a class="code" href="class_filter.html#_zlib_decompressora8">AttachedTransformation</a>()-&gt;<a class="code" href="class_buffered_transformation.html#_zlib_decompressorz1_0">Put</a>(m_verified);
00707 
00708         <span class="keywordflow">if</span> ((m_flags &amp; THROW_EXCEPTION) &amp;&amp; !m_verified)
00709                 <span class="keywordflow">throw</span> HashVerificationFailed();
00710 }
00711 
00712 <span class="comment">// *************************************************************</span>
00713 
00714 <span class="keywordtype">void</span> SignerFilter::IsolatedInitialize(<span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html">NameValuePairs</a> &amp;parameters)
00715 {
00716         m_putMessage = parameters.<a class="code" href="class_name_value_pairs.html#_x_t_r___d_ha40">GetValueWithDefault</a>(Name::PutMessage(), <span class="keyword">false</span>);
00717         m_messageAccumulator.reset(m_signer.<a class="code" href="class_p_k___signer.html#_signer_with_recovery_templatea12">NewSignatureAccumulator</a>());
00718 }
00719 
<a name="l00720"></a><a class="code" href="class_signer_filter.html#_signer_filtera2">00720</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_signer_filter.html#_signer_filtera2">SignerFilter::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)
00721 {
00722         FILTER_BEGIN;
00723         m_messageAccumulator-&gt;Update(inString, length);
00724         <span class="keywordflow">if</span> (m_putMessage)
00725                 FILTER_OUTPUT(1, inString, length, 0);
00726         <span class="keywordflow">if</span> (messageEnd)
00727         {
00728                 m_buf.<a class="code" href="class_sec_block.html#_sec_block_with_hinta19">New</a>(m_signer.<a class="code" href="class_p_k___signature_scheme.html#_p_k___verifier_with_recoverya6">SignatureLength</a>());
00729                 m_signer.<a class="code" href="class_p_k___signer.html#_signer_with_recovery_templatea10">Sign</a>(m_rng, m_messageAccumulator.release(), m_buf);
00730                 FILTER_OUTPUT(2, m_buf, m_buf.<a class="code" href="class_sec_block.html#_sec_block_with_hinta13">size</a>(), messageEnd);
00731                 m_messageAccumulator.reset(m_signer.<a class="code" href="class_p_k___signer.html#_signer_with_recovery_templatea12">NewSignatureAccumulator</a>());
00732         }
00733         FILTER_END_NO_MESSAGE_END;
00734 }
00735 
00736 SignatureVerificationFilter::SignatureVerificationFilter(<span class="keyword">const</span> <a class="code" href="class_p_k___verifier.html">PK_Verifier</a> &amp;verifier, <a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> *attachment, word32 flags)
00737         : <a class="code" href="class_filter_with_buffered_input.html">FilterWithBufferedInput</a>(attachment)
00738         , m_verifier(verifier)
00739 {
00740         IsolatedInitialize(MakeParameters(Name::SignatureVerificationFilterFlags(), flags));
00741 }
00742 
00743 <span class="keywordtype">void</span> SignatureVerificationFilter::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)
00744 {
00745         m_flags = parameters.<a class="code" href="class_name_value_pairs.html#_x_t_r___d_ha40">GetValueWithDefault</a>(Name::SignatureVerificationFilterFlags(), (word32)DEFAULT_FLAGS);
00746         m_messageAccumulator.reset(m_verifier.<a class="code" href="class_p_k___verifier.html#_verifier_with_recovery_templatea15">NewVerificationAccumulator</a>());
00747         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> size = m_verifier.<a class="code" href="class_p_k___signature_scheme.html#_p_k___verifier_with_recoverya6">SignatureLength</a>();
00748         m_verified = <span class="keyword">false</span>;
00749         firstSize = m_flags &amp; SIGNATURE_AT_BEGIN ? size : 0;
00750         blockSize = 1;
00751         lastSize = m_flags &amp; SIGNATURE_AT_BEGIN ? 0 : size;
00752 }
00753 
00754 <span class="keywordtype">void</span> SignatureVerificationFilter::FirstPut(<span class="keyword">const</span> byte *inString)
00755 {
00756         <span class="keywordflow">if</span> (m_flags &amp; SIGNATURE_AT_BEGIN)
00757         {
00758                 <span class="keywordflow">if</span> (m_verifier.<a class="code" href="class_p_k___verifier.html#_verifier_with_recovery_templatea14">SignatureUpfrontForVerification</a>())
00759                         m_verifier.<a class="code" href="class_p_k___verifier.html#_verifier_with_recovery_templatea17">InitializeVerificationAccumulator</a>(*m_messageAccumulator, inString);
00760                 <span class="keywordflow">else</span>
00761                 {
00762                         m_signature.<a class="code" href="class_sec_block.html#_sec_block_with_hinta19">New</a>(m_verifier.<a class="code" href="class_p_k___signature_scheme.html#_p_k___verifier_with_recoverya6">SignatureLength</a>());
00763                         memcpy(m_signature, inString, m_signature.<a class="code" href="class_sec_block.html#_sec_block_with_hinta13">size</a>());
00764                 }
00765 
00766                 <span class="keywordflow">if</span> (m_flags &amp; PUT_SIGNATURE)
00767                         <a class="code" href="class_filter.html#_zlib_decompressora8">AttachedTransformation</a>()-&gt;<a class="code" href="class_buffered_transformation.html#_zlib_decompressorz1_0">Put</a>(inString, m_signature.<a class="code" href="class_sec_block.html#_sec_block_with_hinta13">size</a>());
00768         }
00769         <span class="keywordflow">else</span>
00770         {
00771                 assert(!m_verifier.<a class="code" href="class_p_k___verifier.html#_verifier_with_recovery_templatea14">SignatureUpfrontForVerification</a>());
00772         }
00773 }
00774 
00775 <span class="keywordtype">void</span> SignatureVerificationFilter::NextPutMultiple(<span class="keyword">const</span> byte *inString, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length)
00776 {
00777         m_messageAccumulator-&gt;Update(inString, length);
00778         <span class="keywordflow">if</span> (m_flags &amp; PUT_MESSAGE)
00779                 <a class="code" href="class_filter.html#_zlib_decompressora8">AttachedTransformation</a>()-&gt;<a class="code" href="class_buffered_transformation.html#_zlib_decompressorz1_0">Put</a>(inString, length);
00780 }
00781 
00782 <span class="keywordtype">void</span> SignatureVerificationFilter::LastPut(<span class="keyword">const</span> byte *inString, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length)
00783 {
00784         <span class="keywordflow">if</span> (m_flags &amp; SIGNATURE_AT_BEGIN)
00785         {
00786                 assert(length == 0);
00787                 m_verified = m_verifier.<a class="code" href="class_p_k___verifier.html#_verifier_with_recovery_templatea16">Verify</a>(m_messageAccumulator.release(), m_signature);
00788         }
00789         <span class="keywordflow">else</span>
00790         {
00791                 m_verified = (length==m_verifier.<a class="code" href="class_p_k___signature_scheme.html#_p_k___verifier_with_recoverya6">SignatureLength</a>() &amp;&amp; m_verifier.<a class="code" href="class_p_k___verifier.html#_verifier_with_recovery_templatea16">Verify</a>(m_messageAccumulator.release(), inString));
00792                 <span class="keywordflow">if</span> (m_flags &amp; PUT_SIGNATURE)
00793                         <a class="code" href="class_filter.html#_zlib_decompressora8">AttachedTransformation</a>()-&gt;<a class="code" href="class_buffered_transformation.html#_zlib_decompressorz1_0">Put</a>(inString, length);
00794         }
00795 
00796         <span class="keywordflow">if</span> (m_flags &amp; PUT_RESULT)
00797                 <a class="code" href="class_filter.html#_zlib_decompressora8">AttachedTransformation</a>()-&gt;<a class="code" href="class_buffered_transformation.html#_zlib_decompressorz1_0">Put</a>(m_verified);
00798 
00799         <span class="keywordflow">if</span> ((m_flags &amp; THROW