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<?xml version="1.0" encoding="iso-8859-1"?>
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  <title>paramiko.ServerInterface</title>
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        <a href="paramiko-module.html">Package&nbsp;paramiko</a> ::
        Class&nbsp;ServerInterface
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<!-- =========== START OF CLASS DESCRIPTION =========== -->
<h2 class="class">Type ServerInterface</h2>

<pre class="base-tree">
<a href="__builtin__.object-class.html"><code>object</code></a> --+
         |
        <b>ServerInterface</b>
</pre><br />

<hr/>

<p>This class defines an interface for controlling the behavior of 
paramiko in server mode.</p>
Methods on this class are called from paramiko's primary thread, so 
you shouldn't do too much work in them. (Certainly nothing that blocks or 
sleeps.)
<hr/>


<!-- =========== START OF METHOD SUMMARY =========== -->
<table class="summary" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="summary">
  <th colspan="2">Method Summary</th></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">        int or <a href="paramiko.server.InteractiveQuery-class.html" 
        class="link"><code>InteractiveQuery</code></a>
</font></td>
  <td><code><span class="summary-sig"><a href="../private/paramiko.ServerInterface-class.html#check_auth_interactive" class="summary-sig-name"><code>check_auth_interactive</code></a>(<span class=summary-sig-arg>self</span>,
          <span class=summary-sig-arg>username</span>,
          <span class=summary-sig-arg>submethods</span>)</span></code>
<br />
Begin an interactive authentication challenge, if supported.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">        int or <a href="paramiko.server.InteractiveQuery-class.html" 
        class="link"><code>InteractiveQuery</code></a>
</font></td>
  <td><code><span class="summary-sig"><a href="../private/paramiko.ServerInterface-class.html#check_auth_interactive_response" class="summary-sig-name"><code>check_auth_interactive_response</code></a>(<span class=summary-sig-arg>self</span>,
          <span class=summary-sig-arg>responses</span>)</span></code>
<br />
Continue or finish an interactive authentication challenge, if 
supported.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">        int
</font></td>
  <td><code><span class="summary-sig"><a href="../private/paramiko.ServerInterface-class.html#check_auth_none" class="summary-sig-name"><code>check_auth_none</code></a>(<span class=summary-sig-arg>self</span>,
          <span class=summary-sig-arg>username</span>)</span></code>
<br />
Determine if a client may open channels with no (further) 
authentication.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">        int
</font></td>
  <td><code><span class="summary-sig"><a href="../private/paramiko.ServerInterface-class.html#check_auth_password" class="summary-sig-name"><code>check_auth_password</code></a>(<span class=summary-sig-arg>self</span>,
          <span class=summary-sig-arg>username</span>,
          <span class=summary-sig-arg>password</span>)</span></code>
<br />
Determine if a given username and password supplied by the client is 
acceptable for use in authentication.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">        int
</font></td>
  <td><code><span class="summary-sig"><a href="../private/paramiko.ServerInterface-class.html#check_auth_publickey" class="summary-sig-name"><code>check_auth_publickey</code></a>(<span class=summary-sig-arg>self</span>,
          <span class=summary-sig-arg>username</span>,
          <span class=summary-sig-arg>key</span>)</span></code>
<br />
Determine if a given key supplied by the client is acceptable for use 
in authentication.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">        bool
</font></td>
  <td><code><span class="summary-sig"><a href="../private/paramiko.ServerInterface-class.html#check_channel_exec_request" class="summary-sig-name"><code>check_channel_exec_request</code></a>(<span class=summary-sig-arg>self</span>,
          <span class=summary-sig-arg>channel</span>,
          <span class=summary-sig-arg>command</span>)</span></code>
<br />
Determine if a shell command will be executed for the client.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">        bool
</font></td>
  <td><code><span class="summary-sig"><a href="../private/paramiko.ServerInterface-class.html#check_channel_pty_request" class="summary-sig-name"><code>check_channel_pty_request</code></a>(<span class=summary-sig-arg>self</span>,
          <span class=summary-sig-arg>channel</span>,
          <span class=summary-sig-arg>term</span>,
          <span class=summary-sig-arg>width</span>,
          <span class=summary-sig-arg>height</span>,
          <span class=summary-sig-arg>pixelwidth</span>,
          <span class=summary-sig-arg>pixelheight</span>,
          <span class=summary-sig-arg>modes</span>)</span></code>
<br />
Determine if a pseudo-terminal of the given dimensions (usually 
requested for shell access) can be provided on the given channel.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">        int
</font></td>
  <td><code><span class="summary-sig"><a href="../private/paramiko.ServerInterface-class.html#check_channel_request" class="summary-sig-name"><code>check_channel_request</code></a>(<span class=summary-sig-arg>self</span>,
          <span class=summary-sig-arg>kind</span>,
          <span class=summary-sig-arg>chanid</span>)</span></code>
<br />
Determine if a channel request of a given type will be granted, and 
return <code>OPEN_SUCCEEDED</code> or an error code.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">        bool
</font></td>
  <td><code><span class="summary-sig"><a href="../private/paramiko.ServerInterface-class.html#check_channel_shell_request" class="summary-sig-name"><code>check_channel_shell_request</code></a>(<span class=summary-sig-arg>self</span>,
          <span class=summary-sig-arg>channel</span>)</span></code>
<br />
Determine if a shell will be provided to the client on the given 
channel.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">        bool
</font></td>
  <td><code><span class="summary-sig"><a href="../private/paramiko.ServerInterface-class.html#check_channel_subsystem_request" class="summary-sig-name"><code>check_channel_subsystem_request</code></a>(<span class=summary-sig-arg>self</span>,
          <span class=summary-sig-arg>channel</span>,
          <span class=summary-sig-arg>name</span>)</span></code>
<br />
Determine if a requested subsystem will be provided to the client on 
the given channel.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">        bool
</font></td>
  <td><code><span class="summary-sig"><a href="../private/paramiko.ServerInterface-class.html#check_channel_window_change_request" class="summary-sig-name"><code>check_channel_window_change_request</code></a>(<span class=summary-sig-arg>self</span>,
          <span class=summary-sig-arg>channel</span>,
          <span class=summary-sig-arg>width</span>,
          <span class=summary-sig-arg>height</span>,
          <span class=summary-sig-arg>pixelwidth</span>,
          <span class=summary-sig-arg>pixelheight</span>)</span></code>
<br />
Determine if the pseudo-terminal on the given channel can be 
resized.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">        bool
</font></td>
  <td><code><span class="summary-sig"><a href="../private/paramiko.ServerInterface-class.html#check_global_request" class="summary-sig-name"><code>check_global_request</code></a>(<span class=summary-sig-arg>self</span>,
          <span class=summary-sig-arg>kind</span>,
          <span class=summary-sig-arg>msg</span>)</span></code>
<br />
Handle a global request of the given <code>kind</code>.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">        str
</font></td>
  <td><code><span class="summary-sig"><a href="../private/paramiko.ServerInterface-class.html#get_allowed_auths" class="summary-sig-name"><code>get_allowed_auths</code></a>(<span class=summary-sig-arg>self</span>,
          <span class=summary-sig-arg>username</span>)</span></code>
<br />
Return a list of authentication methods supported by the server.</td></tr>
<tr bgcolor="#e8f0f8" class="group">
  <th colspan="2">&nbsp;&nbsp;&nbsp;&nbsp;Inherited from object</th></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">&nbsp;</font></td>
  <td><code><span class="summary-sig"><a href="__builtin__.object-class.html#__init__" class="summary-sig-name"><code>__init__</code></a>(<span class="summary-sig-vararg">...</span>)</span></code>
<br />
x.__init__(...) initializes x; see x.__class__.__doc__ for 
signature</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">&nbsp;</font></td>
  <td><code><span class="summary-sig"><a href="__builtin__.object-class.html#__delattr__" class="summary-sig-name"><code>__delattr__</code></a>(<span class="summary-sig-vararg">...</span>)</span></code>
<br />
x.__delattr__('name') &lt;==&gt; del x.name</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">&nbsp;</font></td>
  <td><code><span class="summary-sig"><a href="__builtin__.object-class.html#__getattribute__" class="summary-sig-name"><code>__getattribute__</code></a>(<span class="summary-sig-vararg">...</span>)</span></code>
<br />
x.__getattribute__('name') &lt;==&gt; x.name</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">&nbsp;</font></td>
  <td><code><span class="summary-sig"><a href="__builtin__.object-class.html#__hash__" class="summary-sig-name"><code>__hash__</code></a>(<span class=summary-sig-arg>x</span>)</span></code>
<br />
x.__hash__() &lt;==&gt; hash(x)</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">&nbsp;</font></td>
  <td><code><span class="summary-sig"><a href="__builtin__.object-class.html#__new__" class="summary-sig-name"><code>__new__</code></a>(<span class=summary-sig-arg>T</span>,
          <span class=summary-sig-arg>S</span>,
          <span class="summary-sig-vararg">...</span>)</span></code>
<br />
T.__new__(S, ...) -&gt; a new object with type S, a subtype of T</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">&nbsp;</font></td>
  <td><code><span class="summary-sig"><a href="__builtin__.object-class.html#__reduce__" class="summary-sig-name"><code>__reduce__</code></a>(<span class="summary-sig-vararg">...</span>)</span></code>
<br />
helper for pickle</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">&nbsp;</font></td>
  <td><code><span class="summary-sig"><a href="__builtin__.object-class.html#__reduce_ex__" class="summary-sig-name"><code>__reduce_ex__</code></a>(<span class="summary-sig-vararg">...</span>)</span></code>
<br />
helper for pickle</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">&nbsp;</font></td>
  <td><code><span class="summary-sig"><a href="__builtin__.object-class.html#__repr__" class="summary-sig-name"><code>__repr__</code></a>(<span class=summary-sig-arg>x</span>)</span></code>
<br />
x.__repr__() &lt;==&gt; repr(x)</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">&nbsp;</font></td>
  <td><code><span class="summary-sig"><a href="__builtin__.object-class.html#__setattr__" class="summary-sig-name"><code>__setattr__</code></a>(<span class="summary-sig-vararg">...</span>)</span></code>
<br />
x.__setattr__('name', value) &lt;==&gt; x.name = value</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">&nbsp;</font></td>
  <td><code><span class="summary-sig"><a href="__builtin__.object-class.html#__str__" class="summary-sig-name"><code>__str__</code></a>(<span class=summary-sig-arg>x</span>)</span></code>
<br />
x.__str__() &lt;==&gt; str(x)</td></tr>
</table><br />


<!-- =========== START OF METHOD DETAILS =========== -->
<table class="details" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="details">
  <th colspan="2">Method Details</th></tr>
</table>

<a name="check_auth_interactive"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
  <h3><span class="sig"><span class="sig-name">check_auth_interactive</span>(<span class=sig-arg>self</span>,
          <span class=sig-arg>username</span>,
          <span class=sig-arg>submethods</span>)</span>
  </h3>
  <p>Begin an interactive authentication challenge, if supported. You 
  should override this method in server mode if you want to support the 
  <code>&quot;keyboard-interactive&quot;</code> auth type, which requires 
  you to send a series of questions for the client to answer.</p>
  <p>Return <a href="../private/paramiko-module.html#AUTH_FAILED" 
  class="link"><code>AUTH_FAILED</code></a> if this auth method isn't 
  supported. Otherwise, you should return an <a 
  href="paramiko.server.InteractiveQuery-class.html" 
  class="link"><code>InteractiveQuery</code></a> object containing the 
  prompts and instructions for the user. The response will be sent via a 
  call to <a 
  href="../private/paramiko.ServerInterface-class.html#check_auth_interactive_response" 
  class="link"><code>check_auth_interactive_response</code></a>.</p>
  The default implementation always returns <a 
  href="../private/paramiko-module.html#AUTH_FAILED" 
  class="link"><code>AUTH_FAILED</code></a>.
  <dl><dt></dt><dd>
    <dl><dt><b>Parameters:</b></dt>
      <dd><code><b>username</b></code> -
         the username of the authenticating client
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=str)</i>
      <dd><code><b>submethods</b></code> -
         a comma-separated list of methods preferred by the client 
        (usually empty)
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=str)</i>
      </dd>
    </dl>
    <dl><dt><b>Returns:</b></dt>
      <dd>
        <a href="../private/paramiko-module.html#AUTH_FAILED" 
        class="link"><code>AUTH_FAILED</code></a> if this auth method 
        isn't supported; otherwise an object containing queries for the 
        user
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int or <a href="paramiko.server.InteractiveQuery-class.html" 
        class="link"><code>InteractiveQuery</code></a>)</i>
      </dd>
    </dl>
  </dd></dl>
</td></tr></table>

<a name="check_auth_interactive_response"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
  <h3><span class="sig"><span class="sig-name">check_auth_interactive_response</span>(<span class=sig-arg>self</span>,
          <span class=sig-arg>responses</span>)</span>
  </h3>
  <p>Continue or finish an interactive authentication challenge, if 
  supported. You should override this method in server mode if you want 
  to support the <code>&quot;keyboard-interactive&quot;</code> auth 
  type.</p>
  <p>Return <a href="../private/paramiko-module.html#AUTH_FAILED" 
  class="link"><code>AUTH_FAILED</code></a> if the responses are not 
  accepted, <a href="../private/paramiko-module.html#AUTH_SUCCESSFUL" 
  class="link"><code>AUTH_SUCCESSFUL</code></a> if the responses are 
  accepted and complete the authentication, or <a 
  href="../private/paramiko-module.html#AUTH_PARTIALLY_SUCCESSFUL" 
  class="link"><code>AUTH_PARTIALLY_SUCCESSFUL</code></a> if your 
  authentication is stateful, and this set of responses is accepted for 
  authentication, but more authentication is required. (In this latter 
  case, <a 
  href="../private/paramiko.ServerInterface-class.html#get_allowed_auths" 
  class="link"><code>get_allowed_auths</code></a> will be called to 
  report to the client what options it has for continuing the 
  authentication.)</p>
  <p>If you wish to continue interactive authentication with more 
  questions, you may return an <a 
  href="paramiko.server.InteractiveQuery-class.html" 
  class="link"><code>InteractiveQuery</code></a> object, which should 
  cause the client to respond with more answers, calling this method 
  again. This cycle can continue indefinitely.</p>
  The default implementation always returns <a 
  href="../private/paramiko-module.html#AUTH_FAILED" 
  class="link"><code>AUTH_FAILED</code></a>.
  <dl><dt></dt><dd>
    <dl><dt><b>Parameters:</b></dt>
      <dd><code><b>responses</b></code> -
         list of responses from the client
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=list(str))</i>
      </dd>
    </dl>
    <dl><dt><b>Returns:</b></dt>
      <dd>
        <a href="../private/paramiko-module.html#AUTH_FAILED" 
        class="link"><code>AUTH_FAILED</code></a> if the authentication 
        fails; <a href="../private/paramiko-module.html#AUTH_SUCCESSFUL" 
        class="link"><code>AUTH_SUCCESSFUL</code></a> if it succeeds; <a 
        href="../private/paramiko-module.html#AUTH_PARTIALLY_SUCCESSFUL" 
        class="link"><code>AUTH_PARTIALLY_SUCCESSFUL</code></a> if the 
        interactive auth is successful, but authentication must continue; 
        otherwise an object containing queries for the user
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int or <a href="paramiko.server.InteractiveQuery-class.html" 
        class="link"><code>InteractiveQuery</code></a>)</i>
      </dd>
    </dl>
  </dd></dl>
</td></tr></table>

<a name="check_auth_none"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
  <h3><span class="sig"><span class="sig-name">check_auth_none</span>(<span class=sig-arg>self</span>,
          <span class=sig-arg>username</span>)</span>
  </h3>
  <p>Determine if a client may open channels with no (further) 
  authentication.</p>
  <p>Return <a href="../private/paramiko-module.html#AUTH_FAILED" 
  class="link"><code>AUTH_FAILED</code></a> if the client must 
  authenticate, or <a 
  href="../private/paramiko-module.html#AUTH_SUCCESSFUL" 
  class="link"><code>AUTH_SUCCESSFUL</code></a> if it's okay for the 
  client to not authenticate.</p>
  The default implementation always returns <a 
  href="../private/paramiko-module.html#AUTH_FAILED" 
  class="link"><code>AUTH_FAILED</code></a>.
  <dl><dt></dt><dd>
    <dl><dt><b>Parameters:</b></dt>
      <dd><code><b>username</b></code> -
         the username of the client.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=str)</i>
      </dd>
    </dl>
    <dl><dt><b>Returns:</b></dt>
      <dd>
        <a href="../private/paramiko-module.html#AUTH_FAILED" 
        class="link"><code>AUTH_FAILED</code></a> if the authentication 
        fails; <a href="../private/paramiko-module.html#AUTH_SUCCESSFUL" 
        class="link"><code>AUTH_SUCCESSFUL</code></a> if it succeeds.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int)</i>
      </dd>
    </dl>
  </dd></dl>
</td></tr></table>

<a name="check_auth_password"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
  <h3><span class="sig"><span class="sig-name">check_auth_password</span>(<span class=sig-arg>self</span>,
          <span class=sig-arg>username</span>,
          <span class=sig-arg>password</span>)</span>
  </h3>
  <p>Determine if a given username and password supplied by the client is 
  acceptable for use in authentication.</p>
  <p>Return <a href="../private/paramiko-module.html#AUTH_FAILED" 
  class="link"><code>AUTH_FAILED</code></a> if the password is not 
  accepted, <a href="../private/paramiko-module.html#AUTH_SUCCESSFUL" 
  class="link"><code>AUTH_SUCCESSFUL</code></a> if the password is 
  accepted and completes the authentication, or <a 
  href="../private/paramiko-module.html#AUTH_PARTIALLY_SUCCESSFUL" 
  class="link"><code>AUTH_PARTIALLY_SUCCESSFUL</code></a> if your 
  authentication is stateful, and this key is accepted for 
  authentication, but more authentication is required. (In this latter 
  case, <a 
  href="../private/paramiko.ServerInterface-class.html#get_allowed_auths" 
  class="link"><code>get_allowed_auths</code></a> will be called to 
  report to the client what options it has for continuing the 
  authentication.)</p>
  The default implementation always returns <a 
  href="../private/paramiko-module.html#AUTH_FAILED" 
  class="link"><code>AUTH_FAILED</code></a>.
  <dl><dt></dt><dd>
    <dl><dt><b>Parameters:</b></dt>
      <dd><code><b>username</b></code> -
         the username of the authenticating client.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=str)</i>
      <dd><code><b>password</b></code> -
         the password given by the client.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=str)</i>
      </dd>
    </dl>
    <dl><dt><b>Returns:</b></dt>
      <dd>
        <a href="../private/paramiko-module.html#AUTH_FAILED" 
        class="link"><code>AUTH_FAILED</code></a> if the authentication 
        fails; <a href="../private/paramiko-module.html#AUTH_SUCCESSFUL" 
        class="link"><code>AUTH_SUCCESSFUL</code></a> if it succeeds; <a 
        href="../private/paramiko-module.html#AUTH_PARTIALLY_SUCCESSFUL" 
        class="link"><code>AUTH_PARTIALLY_SUCCESSFUL</code></a> if the 
        password auth is successful, but authentication must 
        continue.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int)</i>
      </dd>
    </dl>
  </dd></dl>
</td></tr></table>

<a name="check_auth_publickey"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
  <h3><span class="sig"><span class="sig-name">check_auth_publickey</span>(<span class=sig-arg>self</span>,
          <span class=sig-arg>username</span>,
          <span class=sig-arg>key</span>)</span>
  </h3>
  <p>Determine if a given key supplied by the client is acceptable for 
  use in authentication. You should override this method in server mode 
  to check the username and key and decide if you would accept a 
  signature made using this key.</p>
  <p>Return <a href="../private/paramiko-module.html#AUTH_FAILED" 
  class="link"><code>AUTH_FAILED</code></a> if the key is not accepted, 
  <a href="../private/paramiko-module.html#AUTH_SUCCESSFUL" 
  class="link"><code>AUTH_SUCCESSFUL</code></a> if the key is accepted 
  and completes the authentication, or <a 
  href="../private/paramiko-module.html#AUTH_PARTIALLY_SUCCESSFUL" 
  class="link"><code>AUTH_PARTIALLY_SUCCESSFUL</code></a> if your 
  authentication is stateful, and this password is accepted for 
  authentication, but more authentication is required. (In this latter 
  case, <a 
  href="../private/paramiko.ServerInterface-class.html#get_allowed_auths" 
  class="link"><code>get_allowed_auths</code></a> will be called to 
  report to the client what options it has for continuing the 
  authentication.)</p>
  <p>Note that you don't have to actually verify any key signtature here. 
  If you're willing to accept the key, paramiko will do the work of 
  verifying the client's signature.</p>
  The default implementation always returns <a 
  href="../private/paramiko-module.html#AUTH_FAILED" 
  class="link"><code>AUTH_FAILED</code></a>.
  <dl><dt></dt><dd>
    <dl><dt><b>Parameters:</b></dt>
      <dd><code><b>username</b></code> -
         the username of the authenticating client
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=str)</i>
      <dd><code><b>key</b></code> -
         the key object provided by the client
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=<a href="../private/paramiko.PKey-class.html" 
              class="link"><code>PKey</code></a>)</i>
      </dd>
    </dl>
    <dl><dt><b>Returns:</b></dt>
      <dd>
        <a href="../private/paramiko-module.html#AUTH_FAILED" 
        class="link"><code>AUTH_FAILED</code></a> if the client can't 
        authenticate with this key; <a 
        href="../private/paramiko-module.html#AUTH_SUCCESSFUL" 
        class="link"><code>AUTH_SUCCESSFUL</code></a> if it can; <a 
        href="../private/paramiko-module.html#AUTH_PARTIALLY_SUCCESSFUL" 
        class="link"><code>AUTH_PARTIALLY_SUCCESSFUL</code></a> if it can 
        authenticate with this key but must continue with 
        authentication
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int)</i>
      </dd>
    </dl>
  </dd></dl>
</td></tr></table>

<a name="check_channel_exec_request"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
  <h3><span class="sig"><span class="sig-name">check_channel_exec_request</span>(<span class=sig-arg>self</span>,
          <span class=sig-arg>channel</span>,
          <span class=sig-arg>command</span>)</span>
  </h3>
  <p>Determine if a shell command will be executed for the client. If 
  this method returns <code>True</code>, the channel should be connected 
  to the stdin, stdout, and stderr of the shell command.</p>
  The default implementation always returns <code>False</code>.
  <dl><dt></dt><dd>
    <dl><dt><b>Parameters:</b></dt>
      <dd><code><b>channel</b></code> -
         the <a href="paramiko.Channel-class.html" 
        class="link"><code>Channel</code></a> the request arrived on.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=<a href="paramiko.Channel-class.html" 
              class="link"><code>Channel</code></a>)</i>
      <dd><code><b>command</b></code> -
         the command to execute.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=str)</i>
      </dd>
    </dl>
    <dl><dt><b>Returns:</b></dt>
      <dd>
        <code>True</code> if this channel is now hooked up to the 
        stdin, stdout, and stderr of the executing command; 
        <code>False</code> if the command will not be executed.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=bool)</i>
      </dd>
    </dl>
<p><b>Since:</b> 1.1
</p>

  </dd></dl>
</td></tr></table>

<a name="check_channel_pty_request"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
  <h3><span class="sig"><span class="sig-name">check_channel_pty_request</span>(<span class=sig-arg>self</span>,
          <span class=sig-arg>channel</span>,
          <span class=sig-arg>term</span>,
          <span class=sig-arg>width</span>,
          <span class=sig-arg>height</span>,
          <span class=sig-arg>pixelwidth</span>,
          <span class=sig-arg>pixelheight</span>,
          <span class=sig-arg>modes</span>)</span>
  </h3>
  <p>Determine if a pseudo-terminal of the given dimensions (usually 
  requested for shell access) can be provided on the given channel.</p>
  The default implementation always returns <code>False</code>.
  <dl><dt></dt><dd>
    <dl><dt><b>Parameters:</b></dt>
      <dd><code><b>channel</b></code> -
         the <a href="paramiko.Channel-class.html" 
        class="link"><code>Channel</code></a> the pty request arrived 
        on.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=<a href="paramiko.Channel-class.html" 
              class="link"><code>Channel</code></a>)</i>
      <dd><code><b>term</b></code> -
         type of terminal requested (for example, 
        <code>&quot;vt100&quot;</code>).
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=str)</i>
      <dd><code><b>width</b></code> -
         width of screen in characters.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int)</i>
      <dd><code><b>height</b></code> -
         height of screen in characters.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int)</i>
      <dd><code><b>pixelwidth</b></code> -
         width of screen in pixels, if known (may be <code>0</code> if 
        unknown).
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int)</i>
      <dd><code><b>pixelheight</b></code> -
         height of screen in pixels, if known (may be <code>0</code> if 
        unknown).
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int)</i>
      </dd>
    </dl>
    <dl><dt><b>Returns:</b></dt>
      <dd>
        <code>True</code> if the psuedo-terminal has been allocated; 
        <code>False</code> otherwise.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=bool)</i>
      </dd>
    </dl>
  </dd></dl>
</td></tr></table>

<a name="check_channel_request"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
  <h3><span class="sig"><span class="sig-name">check_channel_request</span>(<span class=sig-arg>self</span>,
          <span class=sig-arg>kind</span>,
          <span class=sig-arg>chanid</span>)</span>
  </h3>
  <p>Determine if a channel request of a given type will be granted, and 
  return <code>OPEN_SUCCEEDED</code> or an error code. This method is 
  called in server mode when the client requests a channel, after 
  authentication is complete.</p>
  If you allow channel requests (and an ssh server that didn't would 
  be useless), you should also override some of the channel request 
  methods below, which are used to determine which services will be 
  allowed on a given channel:
  <ul>
    <li>
      <a 
      href="../private/paramiko.ServerInterface-class.html#check_channel_pty_request" 
      class="link"><code>check_channel_pty_request</code></a>
    </li>
    <li>
      <a 
      href="../private/paramiko.ServerInterface-class.html#check_channel_shell_request" 
      class="link"><code>check_channel_shell_request</code></a>
    </li>
    <li>
      <a 
      href="../private/paramiko.ServerInterface-class.html#check_channel_subsystem_request" 
      class="link"><code>check_channel_subsystem_request</code></a>
    </li>
    <li>
      <a 
      href="../private/paramiko.ServerInterface-class.html#check_channel_window_change_request" 
      class="link"><code>check_channel_window_change_request</code></a>
    </li>
  </ul>
  <p>The <code>chanid</code> parameter is a small number that uniquely 
  identifies the channel within a <a href="paramiko.Transport-class.html" 
  class="link"><code>Transport</code></a>. A <a 
  href="paramiko.Channel-class.html" 
  class="link"><code>Channel</code></a> object is not created unless this 
  method returns <code>OPEN_SUCCEEDED</code> -- once a <a 
  href="paramiko.Channel-class.html" 
  class="link"><code>Channel</code></a> object is created, you can call 
  <a href="paramiko.Channel-class.html#get_id" 
  class="link"><code>Channel.get_id</code></a> to retrieve the channel 
  ID.</p>
  The return value should either be <code>OPEN_SUCCEEDED</code> (or 
  <code>0</code>) to allow the channel request, or one of the following 
  error codes to reject it:
  <ul>
    <li>
      <code>OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED</code>
    </li>
    <li>
      <code>OPEN_FAILED_CONNECT_FAILED</code>
    </li>
    <li>
      <code>OPEN_FAILED_UNKNOWN_CHANNEL_TYPE</code>
    </li>
    <li>
      <code>OPEN_FAILED_RESOURCE_SHORTAGE</code>
    </li>
  </ul>
  The default implementation always returns 
  <code>OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED</code>.
  <dl><dt></dt><dd>
    <dl><dt><b>Parameters:</b></dt>
      <dd><code><b>kind</b></code> -
         the kind of channel the client would like to open (usually 
        <code>&quot;session&quot;</code>).
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=str)</i>
      <dd><code><b>chanid</b></code> -
         ID of the channel
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int)</i>
      </dd>
    </dl>
    <dl><dt><b>Returns:</b></dt>
      <dd>
        a success or failure code (listed above)
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int)</i>
      </dd>
    </dl>
  </dd></dl>
</td></tr></table>

<a name="check_channel_shell_request"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
  <h3><span class="sig"><span class="sig-name">check_channel_shell_request</span>(<span class=sig-arg>self</span>,
          <span class=sig-arg>channel</span>)</span>
  </h3>
  <p>Determine if a shell will be provided to the client on the given 
  channel. If this method returns <code>True</code>, the channel should 
  be connected to the stdin/stdout of a shell (or something that acts 
  like a shell).</p>
  The default implementation always returns <code>False</code>.
  <dl><dt></dt><dd>
    <dl><dt><b>Parameters:</b></dt>
      <dd><code><b>channel</b></code> -
         the <a href="paramiko.Channel-class.html" 
        class="link"><code>Channel</code></a> the request arrived on.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=<a href="paramiko.Channel-class.html" 
              class="link"><code>Channel</code></a>)</i>
      </dd>
    </dl>
    <dl><dt><b>Returns:</b></dt>
      <dd>
        <code>True</code> if this channel is now hooked up to a shell; 
        <code>False</code> if a shell can't or won't be provided.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=bool)</i>
      </dd>
    </dl>
  </dd></dl>
</td></tr></table>

<a name="check_channel_subsystem_request"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
  <h3><span class="sig"><span class="sig-name">check_channel_subsystem_request</span>(<span class=sig-arg>self</span>,
          <span class=sig-arg>channel</span>,
          <span class=sig-arg>name</span>)</span>
  </h3>
  <p>Determine if a requested subsystem will be provided to the client on 
  the given channel. If this method returns <code>True</code>, all future 
  I/O through this channel will be assumed to be connected to the 
  requested subsystem. An example of a subsystem is 
  <code>sftp</code>.</p>
  The default implementation checks for a subsystem handler assigned 
  via <a href="paramiko.Transport-class.html#set_subsystem_handler" 
  class="link"><code>Transport.set_subsystem_handler</code></a>. If one 
  has been set, the handler is invoked and this method returns 
  <code>True</code>. Otherwise it returns <code>False</code>.
  <dl><dt></dt><dd>
    <dl><dt><b>Parameters:</b></dt>
      <dd><code><b>channel</b></code> -
         the <a href="paramiko.Channel-class.html" 
        class="link"><code>Channel</code></a> the pty request arrived 
        on.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=<a href="paramiko.Channel-class.html" 
              class="link"><code>Channel</code></a>)</i>
      <dd><code><b>name</b></code> -
         name of the requested subsystem.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=str)</i>
      </dd>
    </dl>
    <dl><dt><b>Returns:</b></dt>
      <dd>
        <code>True</code> if this channel is now hooked up to the 
        requested subsystem; <code>False</code> if that subsystem can't 
        or won't be provided.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=bool)</i>
      </dd>
    </dl>
<p><b>Note:</b> Because the default implementation uses the <a 
href="paramiko.Transport-class.html" 
class="link"><code>Transport</code></a> to identify valid subsystems, you 
probably won't need to override this method.
</p>

  </dd></dl>
</td></tr></table>

<a name="check_channel_window_change_request"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
  <h3><span class="sig"><span class="sig-name">check_channel_window_change_request</span>(<span class=sig-arg>self</span>,
          <span class=sig-arg>channel</span>,
          <span class=sig-arg>width</span>,
          <span class=sig-arg>height</span>,
          <span class=sig-arg>pixelwidth</span>,
          <span class=sig-arg>pixelheight</span>)</span>
  </h3>
  <p>Determine if the pseudo-terminal on the given channel can be 
  resized. This only makes sense if a pty was previously allocated on 
  it.</p>
  The default implementation always returns <code>False</code>.
  <dl><dt></dt><dd>
    <dl><dt><b>Parameters:</b></dt>
      <dd><code><b>channel</b></code> -
         the <a href="paramiko.Channel-class.html" 
        class="link"><code>Channel</code></a> the pty request arrived 
        on.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=<a href="paramiko.Channel-class.html" 
              class="link"><code>Channel</code></a>)</i>
      <dd><code><b>width</b></code> -
         width of screen in characters.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int)</i>
      <dd><code><b>height</b></code> -
         height of screen in characters.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int)</i>
      <dd><code><b>pixelwidth</b></code> -
         width of screen in pixels, if known (may be <code>0</code> if 
        unknown).
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int)</i>
      <dd><code><b>pixelheight</b></code> -
         height of screen in pixels, if known (may be <code>0</code> if 
        unknown).
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=int)</i>
      </dd>
    </dl>
    <dl><dt><b>Returns:</b></dt>
      <dd>
        <code>True</code> if the terminal was resized; 
        <code>False</code> if not.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=bool)</i>
      </dd>
    </dl>
  </dd></dl>
</td></tr></table>

<a name="check_global_request"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
  <h3><span class="sig"><span class="sig-name">check_global_request</span>(<span class=sig-arg>self</span>,
          <span class=sig-arg>kind</span>,
          <span class=sig-arg>msg</span>)</span>
  </h3>
  <p>Handle a global request of the given <code>kind</code>. This method 
  is called in server mode and client mode, whenever the remote host 
  makes a global request. If there are any arguments to the request, they 
  will be in <code>msg</code>.</p>
  <p>There aren't any useful global requests defined, aside from port 
  forwarding, so usually this type of request is an extension to the 
  protocol.</p>
  <p>If the request was successful and you would like to return 
  contextual data to the remote host, return a tuple. Items in the tuple 
  will be sent back with the successful result. (Note that the items in 
  the tuple can only be strings, ints, longs, or bools.)</p>
  The default implementation always returns <code>False</code>, 
  indicating that it does not support any global requests.
  <dl><dt></dt><dd>
    <dl><dt><b>Parameters:</b></dt>
      <dd><code><b>kind</b></code> -
         the kind of global request being made.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=str)</i>
      <dd><code><b>msg</b></code> -
         any extra arguments to the request.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=<a href="paramiko.Message-class.html" 
              class="link"><code>Message</code></a>)</i>
      </dd>
    </dl>
    <dl><dt><b>Returns:</b></dt>
      <dd>
        <code>True</code> or a tuple of data if the request was 
        granted; <code>False</code> otherwise.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=bool)</i>
      </dd>
    </dl>
  </dd></dl>
</td></tr></table>

<a name="get_allowed_auths"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
  <h3><span class="sig"><span class="sig-name">get_allowed_auths</span>(<span class=sig-arg>self</span>,
          <span class=sig-arg>username</span>)</span>
  </h3>
  <p>Return a list of authentication methods supported by the server. 
  This list is sent to clients attempting to authenticate, to inform them 
  of authentication methods that might be successful.</p>
  <p>The &quot;list&quot; is actually a string of comma-separated names 
  of types of authentication. Possible values are 
  <code>&quot;password&quot;</code>, <code>&quot;publickey&quot;</code>, 
  and <code>&quot;none&quot;</code>.</p>
  The default implementation always returns 
  <code>&quot;password&quot;</code>.
  <dl><dt></dt><dd>
    <dl><dt><b>Parameters:</b></dt>
      <dd><code><b>username</b></code> -
         the username requesting authentication.
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=str)</i>
      </dd>
    </dl>
    <dl><dt><b>Returns:</b></dt>
      <dd>
        a comma-separated list of authentication types
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=str)</i>
      </dd>
    </dl>
  </dd></dl>
</td></tr></table>
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