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<title>Crypto++: PasswordBasedKeyDerivationFunction class Reference</title>
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<h1>PasswordBasedKeyDerivationFunction Class Reference</h1><code>#include <<a class="el" href="pwdbased_8h-source.html">pwdbased.h</a>></code>
<p>
<p>Inheritance diagram for PasswordBasedKeyDerivationFunction:
<p><center><img src="class_password_based_key_derivation_function.png" usemap="#PasswordBasedKeyDerivationFunction_map" border="0" alt=""></center>
<map name="PasswordBasedKeyDerivationFunction_map">
<area href="class_p_k_c_s12___p_b_k_d_f.html" alt="PKCS12_PBKDF< T >" shape="rect" coords="0,56,231,80">
<area href="class_p_k_c_s5___p_b_k_d_f1.html" alt="PKCS5_PBKDF1< T >" shape="rect" coords="241,56,472,80">
<area href="class_p_k_c_s5___p_b_k_d_f2___h_m_a_c.html" alt="PKCS5_PBKDF2_HMAC< T >" shape="rect" coords="482,56,713,80">
</map>
<a href="class_password_based_key_derivation_function-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
abstract base class for password based key derivation function
<p>
<p>
Definition at line <a class="el" href="pwdbased_8h-source.html#l00013">13</a> of file <a class="el" href="pwdbased_8h-source.html">pwdbased.h</a>.<table border=0 cellpadding=0 cellspacing=0>
<tr><td></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="anchor" name="_password_based_key_derivation_functiona0" doxytag="PasswordBasedKeyDerivationFunction::MaxDerivedKeyLength" ></a>
virtual unsigned int </td><td class="memItemRight" valign=bottom><b>MaxDerivedKeyLength</b> () const =0</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="_password_based_key_derivation_functiona1" doxytag="PasswordBasedKeyDerivationFunction::UsesPurposeByte" ></a>
virtual bool </td><td class="memItemRight" valign=bottom><b>UsesPurposeByte</b> () const =0</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>virtual unsigned int </td><td class="memItemRight" valign=bottom><a class="el" href="class_password_based_key_derivation_function.html#_password_based_key_derivation_functiona2">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 =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">derive key from password <a href="#_password_based_key_derivation_functiona2"></a><br><br></td></tr>
</table>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="_password_based_key_derivation_functiona2" doxytag="PasswordBasedKeyDerivationFunction::DeriveKey" ></a><p>
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<td class="mdRow">
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<td class="md" nowrap valign="top"> virtual unsigned int PasswordBasedKeyDerivationFunction::DeriveKey </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">byte * </td>
<td class="mdname" nowrap> <em>derived</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>derivedLen</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>byte </td>
<td class="mdname" nowrap> <em>purpose</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>const byte * </td>
<td class="mdname" nowrap> <em>password</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>passwordLen</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>const byte * </td>
<td class="mdname" nowrap> <em>salt</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>saltLen</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>iterations</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>double </td>
<td class="mdname" nowrap> <em>timeInSeconds</em> = <code>0</code></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"> const<code> [pure virtual]</code></td>
</tr>
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</td>
</tr>
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<table cellspacing=5 cellpadding=0 border=0>
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<td>
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<td>
<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>
Implemented in <a class="el" href="class_p_k_c_s5___p_b_k_d_f1.html#_p_k_c_s5___p_b_k_d_f1a2">PKCS5_PBKDF1< T ></a>, <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">PKCS5_PBKDF2_HMAC< T ></a>, and <a class="el" href="class_p_k_c_s12___p_b_k_d_f.html#_p_k_c_s12___p_b_k_d_fa2">PKCS12_PBKDF< T ></a>. </td>
</tr>
</table>
<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 08:24:06 2004 for Crypto++ by
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