1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>ssl::context::set_password_callback (2 of 2 overloads)</title> 5<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../../boost_asio.html" title="Boost.Asio"> 8<link rel="up" href="../set_password_callback.html" title="ssl::context::set_password_callback"> 9<link rel="prev" href="overload1.html" title="ssl::context::set_password_callback (1 of 2 overloads)"> 10<link rel="next" href="../set_verify_callback.html" title="ssl::context::set_verify_callback"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="overload1.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../set_password_callback.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../boost_asio.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../set_verify_callback.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h5 class="title"> 27<a name="boost_asio.reference.ssl__context.set_password_callback.overload2"></a><a class="link" href="overload2.html" title="ssl::context::set_password_callback (2 of 2 overloads)">ssl::context::set_password_callback 28 (2 of 2 overloads)</a> 29</h5></div></div></div> 30<p> 31 Set the password callback. 32 </p> 33<pre class="programlisting">template< 34 typename PasswordCallback> 35void set_password_callback( 36 PasswordCallback callback, 37 boost::system::error_code & ec); 38</pre> 39<p> 40 This function is used to specify a callback function to obtain password 41 information about an encrypted key in PEM format. 42 </p> 43<h6> 44<a name="boost_asio.reference.ssl__context.set_password_callback.overload2.h0"></a> 45 <span class="phrase"><a name="boost_asio.reference.ssl__context.set_password_callback.overload2.parameters"></a></span><a class="link" href="overload2.html#boost_asio.reference.ssl__context.set_password_callback.overload2.parameters">Parameters</a> 46 </h6> 47<div class="variablelist"> 48<p class="title"><b></b></p> 49<dl class="variablelist"> 50<dt><span class="term">callback</span></dt> 51<dd> 52<p> 53 The function object to be used for obtaining the password. The 54 function signature of the handler must be: 55</p> 56<pre class="programlisting">std::string password_callback( 57 std::size_t max_length, // The maximum size for a password. 58 password_purpose purpose // Whether password is for reading or writing. 59); 60</pre> 61<p> 62 The return value of the callback is a string containing the password. 63 </p> 64</dd> 65<dt><span class="term">ec</span></dt> 66<dd><p> 67 Set to indicate what error occurred, if any. 68 </p></dd> 69</dl> 70</div> 71<h6> 72<a name="boost_asio.reference.ssl__context.set_password_callback.overload2.h1"></a> 73 <span class="phrase"><a name="boost_asio.reference.ssl__context.set_password_callback.overload2.remarks"></a></span><a class="link" href="overload2.html#boost_asio.reference.ssl__context.set_password_callback.overload2.remarks">Remarks</a> 74 </h6> 75<p> 76 Calls <code class="computeroutput">SSL_CTX_set_default_passwd_cb</code>. 77 </p> 78</div> 79<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 80<td align="left"></td> 81<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M. 82 Kohlhoff<p> 83 Distributed under the Boost Software License, Version 1.0. (See accompanying 84 file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 85 </p> 86</div></td> 87</tr></table> 88<hr> 89<div class="spirit-nav"> 90<a accesskey="p" href="overload1.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../set_password_callback.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../boost_asio.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../set_verify_callback.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 91</div> 92</body> 93</html> 94
