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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><title>Crypto++: MessageAuthenticationCode Class Reference</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.5.2 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li class="current"><a href="classes.html"><span>Classes</span></a></li> <li><a href="files.html"><span>Files</span></a></li> </ul></div><div class="tabs"> <ul> <li><a href="classes.html"><span>Alphabetical List</span></a></li> <li><a href="annotated.html"><span>Class List</span></a></li> <li><a href="hierarchy.html"><span>Class Hierarchy</span></a></li> <li><a href="functions.html"><span>Class Members</span></a></li> </ul></div><h1>MessageAuthenticationCode Class Reference</h1><!-- doxytag: class="MessageAuthenticationCode" --><!-- doxytag: inherits="HashTransformation,SimpleKeyingInterface" --><code>#include <<a class="el" href="cryptlib_8h-source.html">cryptlib.h</a>></code><p><p>Inheritance diagram for MessageAuthenticationCode:<p><center><img src="class_message_authentication_code.png" usemap="#MessageAuthenticationCode_map" border="0" alt=""></center><map name="MessageAuthenticationCode_map"><area href="class_hash_transformation.html" alt="HashTransformation" shape="rect" coords="1770,112,2645,136"><area href="class_simple_keying_interface.html" alt="SimpleKeyingInterface" shape="rect" coords="2655,112,3530,136"><area href="class_algorithm.html" alt="Algorithm" shape="rect" coords="1770,56,2645,80"><area href="class_clonable.html" alt="Clonable" shape="rect" coords="1770,0,2645,24"><area href="class_c_b_c___m_a_c___base.html" alt="CBC_MAC_Base" shape="rect" coords="0,224,875,248"><area href="class_d_m_a_c___base.html" alt="DMAC_Base< T >" shape="rect" coords="885,224,1760,248"><area href="class_h_m_a_c___base.html" alt="HMAC_Base" shape="rect" coords="1770,224,2645,248"><area href="class_iterated_hash_base.html" alt="IteratedHashBase< word32, MessageAuthenticationCode >" shape="rect" coords="2655,224,3530,248"><area href="class_iterated_hash_base.html" alt="IteratedHashBase< word64, MessageAuthenticationCode >" shape="rect" coords="3540,224,4415,248"><area href="class_two_bases.html" alt="TwoBases< MessageAuthenticationCode, VariableKeyLength< 32, 0, INT_MAX > >" shape="rect" coords="4867,224,5742,248"><area href="class_simple_keying_interface_impl.html" alt="SimpleKeyingInterfaceImpl< CBC_MAC_Base, CBC_MAC< T > >" shape="rect" coords="0,280,875,304"><area href="class_simple_keying_interface_impl.html" alt="SimpleKeyingInterfaceImpl< DMAC_Base< T >, DMAC_Base< T > >" shape="rect" coords="885,280,1760,304"><area href="class_simple_keying_interface_impl.html" alt="SimpleKeyingInterfaceImpl< HMAC_Base, HMAC< T > >" shape="rect" coords="1770,280,2645,304"><area href="class_iterated_hash.html" alt="IteratedHash< word32, LittleEndian, 64, MessageAuthenticationCode >" shape="rect" coords="2655,280,3530,304"><area href="class_v_m_a_c___base.html" alt="VMAC_Base" shape="rect" coords="3540,280,4415,304"><area href="class_simple_keying_interface_impl.html" alt="SimpleKeyingInterfaceImpl< TwoBases< MessageAuthenticationCode, VariableKeyLength< 32, 0, INT_MAX > > >" shape="rect" coords="4867,280,5742,304"><area href="class_algorithm_impl.html" alt="AlgorithmImpl< SimpleKeyingInterfaceImpl< CBC_MAC_Base, CBC_MAC< T > >, CBC_MAC< T > >" shape="rect" coords="0,336,875,360"><area href="class_algorithm_impl.html" alt="AlgorithmImpl< SimpleKeyingInterfaceImpl< DMAC_Base< T >, DMAC_Base< T > >, DMAC_Base< T > >" shape="rect" coords="885,336,1760,360"><area href="class_algorithm_impl.html" alt="AlgorithmImpl< SimpleKeyingInterfaceImpl< HMAC_Base, HMAC< T > >, HMAC< T > >" shape="rect" coords="1770,336,2645,360"><area href="class_t_t_m_a_c___base.html" alt="TTMAC_Base" shape="rect" coords="2655,336,3530,360"><area href="class_simple_keying_interface_impl.html" alt="SimpleKeyingInterfaceImpl< VMAC_Base, SameKeyLengthAs< T_BlockCipher, SimpleKeyingInterface::UNIQUE_IV, T_BlockCipher::BLOCKSIZE > >" shape="rect" coords="3540,336,4415,360"><area href="class_algorithm_impl.html" alt="AlgorithmImpl< SimpleKeyingInterfaceImpl< TwoBases< MessageAuthenticationCode, VariableKeyLength< 32, 0, INT_MAX > > >, PanamaHash< B > >" shape="rect" coords="4425,336,5300,360"><area href="class_algorithm_impl.html" alt="AlgorithmImpl< SimpleKeyingInterfaceImpl< TwoBases< MessageAuthenticationCode, VariableKeyLength< 32, 0, INT_MAX > > >, T_Info >" shape="rect" coords="5310,336,6185,360"><area href="class_message_authentication_code_impl.html" alt="MessageAuthenticationCodeImpl< CBC_MAC_Base, CBC_MAC< T > >" shape="rect" coords="0,392,875,416"><area href="class_message_authentication_code_impl.html" alt="MessageAuthenticationCodeImpl< DMAC_Base< T > >" shape="rect" coords="885,392,1760,416"><area href="class_message_authentication_code_impl.html" alt="MessageAuthenticationCodeImpl< HMAC_Base, HMAC< T > >" shape="rect" coords="1770,392,2645,416"><area href="class_simple_keying_interface_impl.html" alt="SimpleKeyingInterfaceImpl< TTMAC_Base, TTMAC_Base >" shape="rect" coords="2655,392,3530,416"><area href="class_v_m_a_c.html" alt="VMAC< T_BlockCipher, T_DigestBitSize >" shape="rect" coords="3540,392,4415,416"><area href="class_hermetic_hash_function_m_a_c.html" alt="HermeticHashFunctionMAC< PanamaHash< B > >" shape="rect" coords="4425,392,5300,416"><area href="class_hermetic_hash_function_m_a_c.html" alt="HermeticHashFunctionMAC< T_Hash, T_Info >" shape="rect" coords="5310,392,6185,416"><area href="class_c_b_c___m_a_c.html" alt="CBC_MAC< T >" shape="rect" coords="0,448,875,472"><area href="class_clonable_impl.html" alt="ClonableImpl< MessageAuthenticationCodeFinal< DMAC_Base< T > >, MessageAuthenticationCodeImpl< DMAC_Base< T > > >" shape="rect" coords="885,448,1760,472"><area href="class_h_m_a_c.html" alt="HMAC< T >" shape="rect" coords="1770,448,2645,472"><area href="class_algorithm_impl.html" alt="AlgorithmImpl< SimpleKeyingInterfaceImpl< TTMAC_Base, TTMAC_Base >, TTMAC_Base >" shape="rect" coords="2655,448,3530,472"><area href="class_weak_1_1_panama_m_a_c.html" alt="Weak::PanamaMAC< B >" shape="rect" coords="4425,448,5300,472"><area href="class_message_authentication_code_final.html" alt="MessageAuthenticationCodeFinal< DMAC_Base< T > >" shape="rect" coords="885,504,1760,528"><area href="class_message_authentication_code_impl.html" alt="MessageAuthenticationCodeImpl< TTMAC_Base >" shape="rect" coords="2655,504,3530,528"><area href="class_d_m_a_c.html" alt="DMAC< T >" shape="rect" coords="885,560,1760,584"><area href="class_clonable_impl.html" alt="ClonableImpl< MessageAuthenticationCodeFinal< TTMAC_Base >, MessageAuthenticationCodeImpl< TTMAC_Base > >" shape="rect" coords="2655,560,3530,584"><area href="class_message_authentication_code_final.html" alt="MessageAuthenticationCodeFinal< TTMAC_Base >" shape="rect" coords="2655,616,3530,640"><area href="class_t_t_m_a_c.html" alt="TTMAC" shape="rect" coords="2655,672,3530,696"></map><a href="class_message_authentication_code-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>interface for message authentication codes <p><p>Definition at line <a class="el" href="cryptlib_8h-source.html#l00610">610</a> of file <a class="el" href="cryptlib_8h-source.html">cryptlib.h</a>.<table border="0" cellpadding="0" cellspacing="0"><tr><td></td></tr><tr><td colspan="2"><br><h2>Public Types</h2></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">enum </td><td class="memItemRight" valign="bottom"><a class="el" href="class_simple_keying_interface.html#88201c180fbfaa9fef2715252546ad6e">IV_Requirement</a> { <br> <a class="el" href="class_simple_keying_interface.html#88201c180fbfaa9fef2715252546ad6e1cc32e69fe4f385e54d9d482a2ab5a56">UNIQUE_IV</a> = 0, <a class="el" href="class_simple_keying_interface.html#88201c180fbfaa9fef2715252546ad6e4520c4379ee3a1aed95a36e2235ba338">RANDOM_IV</a>, <a class="el" href="class_simple_keying_interface.html#88201c180fbfaa9fef2715252546ad6eceff3ad4b12bcb6d7b61a5bd543a815c">UNPREDICTABLE_RANDOM_IV</a>, <a class="el" href="class_simple_keying_interface.html#88201c180fbfaa9fef2715252546ad6eb659bf6d2c470c50c14bfbab5b2d45ab">INTERNALLY_GENERATED_IV</a>, <br> <a class="el" href="class_simple_keying_interface.html#88201c180fbfaa9fef2715252546ad6ec1d24de3dedd05c28516f452d3ace417">NOT_RESYNCHRONIZABLE</a><br> }</td></tr><tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="class_hash_transformation.html">HashTransformation</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#39b0a4c4cdc11fda358f9975b5e4137e">Ref</a> ()</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">return a reference to this object, <a href="#39b0a4c4cdc11fda358f9975b5e4137e"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="afabefaf445b65d3ba0d8e1c0294afe5"></a><!-- doxytag: member="MessageAuthenticationCode::Update" ref="afabefaf445b65d3ba0d8e1c0294afe5" args="(const byte *input, size_t length)=0" -->virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#afabefaf445b65d3ba0d8e1c0294afe5">Update</a> (const byte *input, size_t length)=0</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">process more input <br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="9fc0b332ef36900ca6ea5d949e95aba1"></a><!-- doxytag: member="MessageAuthenticationCode::CreateUpdateSpace" ref="9fc0b332ef36900ca6ea5d949e95aba1" args="(size_t &size)" -->virtual byte * </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#9fc0b332ef36900ca6ea5d949e95aba1">CreateUpdateSpace</a> (size_t &size)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">request space to write input into <br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#a0b8c7a110d8968268fd02ec32b9a8e8">Final</a> (byte *digest)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">compute hash for current message, then restart for a new message <a href="#a0b8c7a110d8968268fd02ec32b9a8e8"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="92752eebac10497211d7a065faba8725"></a><!-- doxytag: member="MessageAuthenticationCode::Restart" ref="92752eebac10497211d7a065faba8725" args="()" -->virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#92752eebac10497211d7a065faba8725">Restart</a> ()</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">discard the current state, and restart with a new message <br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="41faf8b1293a6c72390cb0c8bd668097"></a><!-- doxytag: member="MessageAuthenticationCode::DigestSize" ref="41faf8b1293a6c72390cb0c8bd668097" args="() const=0" -->virtual unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#41faf8b1293a6c72390cb0c8bd668097">DigestSize</a> () const=0</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">size of the hash returned by <a class="el" href="class_hash_transformation.html#a0b8c7a110d8968268fd02ec32b9a8e8" title="compute hash for current message, then restart for a new message">Final()</a> <br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="09c66b86bbe3c13ea9e8d74775696d42"></a><!-- doxytag: member="MessageAuthenticationCode::BlockSize" ref="09c66b86bbe3c13ea9e8d74775696d42" args="() const" -->virtual unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#09c66b86bbe3c13ea9e8d74775696d42">BlockSize</a> () const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">block size of underlying compression function, or 0 if not block based <br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ee97908d965930ee454f7a88b0ff0f71"></a><!-- doxytag: member="MessageAuthenticationCode::OptimalBlockSize" ref="ee97908d965930ee454f7a88b0ff0f71" args="() const" -->virtual unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#ee97908d965930ee454f7a88b0ff0f71">OptimalBlockSize</a> () const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">input to <a class="el" href="class_hash_transformation.html#afabefaf445b65d3ba0d8e1c0294afe5" title="process more input">Update()</a> should have length a multiple of this for optimal speed <br></td></tr>⌨️ 快捷键说明
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