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<title>Crypto++: TemplatePKCS5_PBKDF2_HMAC< T > class Reference</title>
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<h1>PKCS5_PBKDF2_HMAC< T > Class Template Reference</h1><code>#include <<a class="el" href="pwdbased_8h-source.html">pwdbased.h</a>></code>
<p>
<p>Inheritance diagram for PKCS5_PBKDF2_HMAC< T >:
<p><center><img src="class_p_k_c_s5___p_b_k_d_f2___h_m_a_c.png" usemap="#PKCS5_PBKDF2_HMAC< T >_map" border="0" alt=""></center>
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<area href="class_password_based_key_derivation_function.html" alt="PasswordBasedKeyDerivationFunction" shape="rect" coords="0,0,231,24">
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<a href="class_p_k_c_s5___p_b_k_d_f2___h_m_a_c-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
<h3>template<class T><br>
class PKCS5_PBKDF2_HMAC< T ></h3>
PBKDF2 from PKCS #5, T should be a <a class="el" href="class_hash_transformation.html">HashTransformation</a> class.
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<p>
Definition at line <a class="el" href="pwdbased_8h-source.html#l00037">37</a> of file <a class="el" href="pwdbased_8h-source.html">pwdbased.h</a>.<table border=0 cellpadding=0 cellspacing=0>
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<tr><td colspan=2><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="_p_k_c_s5___p_b_k_d_f2___h_m_a_ca0" doxytag="PKCS5_PBKDF2_HMAC::MaxDerivedKeyLength" ></a>
unsigned int </td><td class="memItemRight" valign=bottom><b>MaxDerivedKeyLength</b> () const</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="_p_k_c_s5___p_b_k_d_f2___h_m_a_ca1" doxytag="PKCS5_PBKDF2_HMAC::UsesPurposeByte" ></a>
bool </td><td class="memItemRight" valign=bottom><b>UsesPurposeByte</b> () const</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>unsigned int </td><td class="memItemRight" valign=bottom><a class="el" href="class_p_k_c_s5___p_b_k_d_f2___h_m_a_c.html#_p_k_c_s5___p_b_k_d_f2___h_m_a_ca2">DeriveKey</a> (byte *derived, unsigned int derivedLen, byte purpose, const byte *password, unsigned int passwordLen, const byte *salt, unsigned int saltLen, unsigned int iterations, double timeInSeconds=0) const</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">derive key from password <a href="#_p_k_c_s5___p_b_k_d_f2___h_m_a_ca2"></a><br><br></td></tr>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="_p_k_c_s5___p_b_k_d_f2___h_m_a_ca2" doxytag="PKCS5_PBKDF2_HMAC::DeriveKey" ></a><p>
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template<class T> </td>
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<td class="md" nowrap valign="top"> unsigned int <a class="el" href="class_p_k_c_s5___p_b_k_d_f2___h_m_a_c.html">PKCS5_PBKDF2_HMAC</a>< T >::DeriveKey </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">byte * </td>
<td class="mdname" nowrap> <em>derived</em>, </td>
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<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>derivedLen</em>, </td>
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<td class="md" nowrap align="right"></td>
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<td class="md" nowrap>byte </td>
<td class="mdname" nowrap> <em>purpose</em>, </td>
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<td class="md" nowrap>const byte * </td>
<td class="mdname" nowrap> <em>password</em>, </td>
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<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>passwordLen</em>, </td>
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<td class="md" nowrap align="right"></td>
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<td class="md" nowrap>const byte * </td>
<td class="mdname" nowrap> <em>salt</em>, </td>
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<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>saltLen</em>, </td>
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<td class="md" nowrap align="right"></td>
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<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>iterations</em>, </td>
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<td class="md" nowrap align="right"></td>
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<td class="md" nowrap>double </td>
<td class="mdname" nowrap> <em>timeInSeconds</em> = <code>0</code></td>
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<td class="md">) </td>
<td class="md" colspan="2"> const<code> [virtual]</code></td>
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<p>
derive key from password
<p>
If timeInSeconds != 0, will iterate until time elapsed, as measured by <a class="el" href="class_thread_user_timer.html">ThreadUserTimer</a> Returns actual iteration count, which is equal to iterations if timeInSeconds == 0, and not less than iterations otherwise.
<p>
Implements <a class="el" href="class_password_based_key_derivation_function.html#_password_based_key_derivation_functiona2">PasswordBasedKeyDerivationFunction</a>.
<p>
Definition at line <a class="el" href="pwdbased_8h-source.html#l00085">85</a> of file <a class="el" href="pwdbased_8h-source.html">pwdbased.h</a>.
<p>
References <a class="el" href="cryptlib_8h-source.html#l00552">HashTransformation::CalculateDigest()</a>, <a class="el" href="hmac_8h-source.html#l00022">HMAC_Base::DigestSize()</a>, <a class="el" href="hrtimer_8cpp-source.html#l00035">TimerBase::ElapsedTimeAsDouble()</a>, <a class="el" href="cryptlib_8h-source.html#l00532">HashTransformation::Final()</a>, <a class="el" href="secblock_8h-source.html#l00274">SecBlock< T, A >::size()</a>, <a class="el" href="hrtimer_8cpp-source.html#l00029">TimerBase::StartTimer()</a>, and <a class="el" href="hmac_8cpp-source.html#l00058">HMAC_Base::Update()</a>. </td>
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<hr>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="pwdbased_8h-source.html">pwdbased.h</a></ul>
<hr size="1"><address style="align: right;"><small>Generated on Sun Nov 7 08:24:07 2004 for Crypto++ by
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