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|
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Class: Net::SSH::UserAuth::UserKeyManager</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta http-equiv="Content-Script-Type" content="text/javascript" />
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</head>
<body>
<div id="classHeader">
<table class="header-table">
<tr class="top-aligned-row">
<td><strong>Class</strong></td>
<td class="class-name-in-header">Net::SSH::UserAuth::UserKeyManager</td>
</tr>
<tr class="top-aligned-row">
<td><strong>In:</strong></td>
<td>
<a href="../../../../files/lib/net/ssh/userauth/userkeys_rb.html">
lib/net/ssh/userauth/userkeys.rb
</a>
<br />
</td>
</tr>
<tr class="top-aligned-row">
<td><strong>Parent:</strong></td>
<td>
Object
</td>
</tr>
</table>
</div>
<!-- banner header -->
<div id="bodyContent">
<div id="contextContent">
<div id="description">
<p>
This class encapsulates all operations done by clients on a user’s
private keys. In practice, the client should never need a reference to a
private key; instead, they grab a list of "identities" (public
keys) that are available from the <a
href="UserKeyManager.html">UserKeyManager</a>, and then use the <a
href="UserKeyManager.html">UserKeyManager</a> to do various private key
operations using those identities.
</p>
<p>
The <a href="UserKeyManager.html">UserKeyManager</a> also uses the <a
href="Agent.html">Agent</a> class to encapsulate the ssh-agent. Thus, from
a client’s perspective it is completely hidden whether an identity
comes from the ssh-agent or from a file on disk.
</p>
</div>
</div>
<div id="method-list">
<h3 class="section-bar">Methods</h3>
<div class="name-list">
<a href="#M000148"><<</a>
<a href="#M000147">add</a>
<a href="#M000149">add_host_key</a>
<a href="#M000145">clear!</a>
<a href="#M000146">clear_host!</a>
<a href="#M000150">finish</a>
<a href="#M000152">host_identities</a>
<a href="#M000151">identities</a>
<a href="#M000144">new</a>
<a href="#M000153">sign</a>
<a href="#M000155">use_agent=</a>
<a href="#M000154">use_agent?</a>
</div>
</div>
</div>
<!-- if includes -->
<div id="section">
<div id="attribute-list">
<h3 class="section-bar">Attributes</h3>
<div class="name-list">
<table>
<tr class="top-aligned-row context-row">
<td class="context-item-name">agent_factory</td>
<td class="context-item-value"> [W] </td>
<td class="context-item-desc">
The agent factory to use when a new agent instance is needed.
</td>
</tr>
<tr class="top-aligned-row context-row">
<td class="context-item-name">buffers</td>
<td class="context-item-value"> [W] </td>
<td class="context-item-desc">
The buffer manager to use for providing new buffer instances.
</td>
</tr>
<tr class="top-aligned-row context-row">
<td class="context-item-name">host_key_files</td>
<td class="context-item-value"> [R] </td>
<td class="context-item-desc">
The list of host key files that will be examined
</td>
</tr>
<tr class="top-aligned-row context-row">
<td class="context-item-name">key_existence_tester</td>
<td class="context-item-value"> [W] </td>
<td class="context-item-desc">
The object that will be used to test whether a given key file is readable.
This object must only respond to "readable?" with one parameter,
the file to test the readability of.
</td>
</tr>
<tr class="top-aligned-row context-row">
<td class="context-item-name">key_files</td>
<td class="context-item-value"> [R] </td>
<td class="context-item-desc">
The list of user key files that will be examined
</td>
</tr>
<tr class="top-aligned-row context-row">
<td class="context-item-name">keys</td>
<td class="context-item-value"> [W] </td>
<td class="context-item-desc">
The key manager instance to use for managing keys
</td>
</tr>
<tr class="top-aligned-row context-row">
<td class="context-item-name">log</td>
<td class="context-item-value"> [W] </td>
<td class="context-item-desc">
The logger instance to use for logging messages
</td>
</tr>
</table>
</div>
</div>
<!-- if method_list -->
<div id="methods">
<h3 class="section-bar">Public Class methods</h3>
<div id="method-M000144" class="method-detail">
<a name="M000144"></a>
<div class="method-heading">
<a href="#M000144" class="method-signature">
<span class="method-name">new</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p>
Create a new <a href="UserKeyManager.html">UserKeyManager</a>. By default,
the manager will use the ssh-agent (if it is running).
</p>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000144-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000144-source">
<pre>
<span class="ruby-comment cmt"># File lib/net/ssh/userauth/userkeys.rb, line 64</span>
64: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>
65: <span class="ruby-ivar">@key_files</span> = []
66: <span class="ruby-ivar">@host_key_files</span> = []
67: <span class="ruby-ivar">@use_agent</span> = <span class="ruby-keyword kw">true</span>
68: <span class="ruby-ivar">@agent</span> = <span class="ruby-keyword kw">nil</span>
69: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<h3 class="section-bar">Public Instance methods</h3>
<div id="method-M000148" class="method-detail">
<a name="M000148"></a>
<div class="method-heading">
<span class="method-name"><<</span><span class="method-args">( key_file )</span>
</div>
<div class="method-description">
<p>
Alias for <a href="UserKeyManager.html#M000147">add</a>
</p>
</div>
</div>
<div id="method-M000147" class="method-detail">
<a name="M000147"></a>
<div class="method-heading">
<a href="#M000147" class="method-signature">
<span class="method-name">add</span><span class="method-args">( key_file )</span>
</a>
</div>
<div class="method-description">
<p>
Add the given key_file to the list of key files that will be used.
</p>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000147-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000147-source">
<pre>
<span class="ruby-comment cmt"># File lib/net/ssh/userauth/userkeys.rb, line 92</span>
92: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">add</span>( <span class="ruby-identifier">key_file</span> )
93: <span class="ruby-ivar">@key_files</span>.<span class="ruby-identifier">push</span>( <span class="ruby-identifier">key_file</span> ).<span class="ruby-identifier">uniq!</span>
94: <span class="ruby-keyword kw">self</span>
95: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000149" class="method-detail">
<a name="M000149"></a>
<div class="method-heading">
<a href="#M000149" class="method-signature">
<span class="method-name">add_host_key</span><span class="method-args">( key_file )</span>
</a>
</div>
<div class="method-description">
<p>
Add the given key_file to the list of host key files that will be used.
</p>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000149-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000149-source">
<pre>
<span class="ruby-comment cmt"># File lib/net/ssh/userauth/userkeys.rb, line 101</span>
101: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">add_host_key</span>( <span class="ruby-identifier">key_file</span> )
102: <span class="ruby-ivar">@host_key_files</span>.<span class="ruby-identifier">push</span>( <span class="ruby-identifier">key_file</span> ).<span class="ruby-identifier">uniq!</span>
103: <span class="ruby-keyword kw">self</span>
104: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000145" class="method-detail">
<a name="M000145"></a>
<div class="method-heading">
<a href="#M000145" class="method-signature">
<span class="method-name">clear!</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p>
Clear all knowledge of any loaded user keys. This also clears the list of
default identity files that are to be loaded, thus making it appropriate to
use if a client wishes to NOT use the default identity files.
</p>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000145-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000145-source">
<pre>
<span class="ruby-comment cmt"># File lib/net/ssh/userauth/userkeys.rb, line 75</span>
75: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">clear!</span>
76: <span class="ruby-ivar">@key_files</span> = []
77: <span class="ruby-ivar">@known_identities</span> = <span class="ruby-keyword kw">nil</span>
78: <span class="ruby-keyword kw">self</span>
79: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000146" class="method-detail">
<a name="M000146"></a>
<div class="method-heading">
<a href="#M000146" class="method-signature">
<span class="method-name">clear_host!</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p>
Clear all knowledge of any loaded host keys. This also clears the list of
default identity files that are to be loaded, thus making it appropriate to
use if a client wishes to NOT use the default identity files.
</p>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000146-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000146-source">
<pre>
<span class="ruby-comment cmt"># File lib/net/ssh/userauth/userkeys.rb, line 85</span>
85: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">clear_host!</span>
86: <span class="ruby-ivar">@host_key_files</span> = []
87: <span class="ruby-ivar">@known_host_identities</span> = <span class="ruby-keyword kw">nil</span>
88: <span class="ruby-keyword kw">self</span>
89: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000150" class="method-detail">
<a name="M000150"></a>
<div class="method-heading">
<a href="#M000150" class="method-signature">
<span class="method-name">finish</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p>
This is used as a hint to the <a
href="UserKeyManager.html">UserKeyManager</a> indicating that the agent
connection is no longer needed. Any other open resources may be closed at
this time.
</p>
<p>
Calling this does NOT indicate that the <a
href="UserKeyManager.html">UserKeyManager</a> will no longer be used.
Identities may still be requested and operations done on loaded identities,
in which case, the agent will be automatically reconnected. This method
simply allows the client connection to be closed when it will not be used
in the immediate future.
</p>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000150-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000150-source">
<pre>
<span class="ruby-comment cmt"># File lib/net/ssh/userauth/userkeys.rb, line 115</span>
115: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">finish</span>
116: <span class="ruby-identifier">close_agent</span>
117: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000152" class="method-detail">
<a name="M000152"></a>
<div class="method-heading">
<a href="#M000152" class="method-signature">
<span class="method-name">host_identities</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p>
Returns an array of host identities (public keys) known to this manager.
Host identities are those that identify the current host, and are used
(typically) for hostbased authentication.
</p>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000152-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000152-source">
<pre>
<span class="ruby-comment cmt"># File lib/net/ssh/userauth/userkeys.rb, line 154</span>
154: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">host_identities</span>
155: <span class="ruby-identifier">identities</span> = []
156: <span class="ruby-ivar">@known_host_identities</span> = <span class="ruby-constant">Hash</span>.<span class="ruby-identifier">new</span>
157:
158: <span class="ruby-ivar">@host_key_files</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">file</span><span class="ruby-operator">|</span>
159: <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@key_existence_tester</span>.<span class="ruby-identifier">readable?</span>( <span class="ruby-identifier">file</span> )
160: <span class="ruby-keyword kw">begin</span>
161: <span class="ruby-identifier">key</span> = <span class="ruby-ivar">@keys</span>.<span class="ruby-identifier">load_public_key</span>( <span class="ruby-identifier">file</span> <span class="ruby-operator">+</span> <span class="ruby-value str">".pub"</span> )
162: <span class="ruby-identifier">identities</span>.<span class="ruby-identifier">push</span> <span class="ruby-identifier">key</span>
163: <span class="ruby-ivar">@known_host_identities</span>[ <span class="ruby-identifier">key</span> ] =
164: { <span class="ruby-identifier">:from</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">:file</span>, <span class="ruby-identifier">:file</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">file</span> }
165: <span class="ruby-keyword kw">rescue</span> <span class="ruby-constant">Exception</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">e</span>
166: <span class="ruby-ivar">@log</span>.<span class="ruby-identifier">warn</span> <span class="ruby-value str">"could not load public host key file "</span> <span class="ruby-operator">+</span>
167: <span class="ruby-node">"'#{file}.pub' (#{e.message} [#{e.class}])"</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@log</span>.<span class="ruby-identifier">warn?</span>
168: <span class="ruby-keyword kw">end</span>
169: <span class="ruby-keyword kw">end</span>
170: <span class="ruby-keyword kw">end</span>
171:
172: <span class="ruby-identifier">identities</span>
173: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000151" class="method-detail">
<a name="M000151"></a>
<div class="method-heading">
<a href="#M000151" class="method-signature">
<span class="method-name">identities</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p>
Returns an array of identities (public keys) known to this manager. The
origin of the identities may be from files on disk or from an ssh-agent.
Note that identities from an ssh-agent are always listed first in the
array, with other identities coming after.
</p>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000151-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000151-source">
<pre>
<span class="ruby-comment cmt"># File lib/net/ssh/userauth/userkeys.rb, line 123</span>
123: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">identities</span>
124: <span class="ruby-identifier">identities</span> = []
125: <span class="ruby-ivar">@known_identities</span> = <span class="ruby-constant">Hash</span>.<span class="ruby-identifier">new</span>
126:
127: <span class="ruby-identifier">ensure_agent</span>
128: <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@agent</span>
129: <span class="ruby-ivar">@agent</span>.<span class="ruby-identifier">identities</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">key</span><span class="ruby-operator">|</span>
130: <span class="ruby-identifier">identities</span>.<span class="ruby-identifier">push</span> <span class="ruby-identifier">key</span>
131: <span class="ruby-ivar">@known_identities</span>[ <span class="ruby-identifier">key</span> ] = { <span class="ruby-identifier">:from</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">:agent</span> }
132: <span class="ruby-keyword kw">end</span>
133: <span class="ruby-keyword kw">end</span>
134:
135: <span class="ruby-ivar">@key_files</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">file</span><span class="ruby-operator">|</span>
136: <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@key_existence_tester</span>.<span class="ruby-identifier">readable?</span>( <span class="ruby-identifier">file</span> )
137: <span class="ruby-keyword kw">begin</span>
138: <span class="ruby-identifier">key</span> = <span class="ruby-ivar">@keys</span>.<span class="ruby-identifier">load_public_key</span>( <span class="ruby-identifier">file</span> <span class="ruby-operator">+</span> <span class="ruby-value str">".pub"</span> )
139: <span class="ruby-identifier">identities</span>.<span class="ruby-identifier">push</span> <span class="ruby-identifier">key</span>
140: <span class="ruby-ivar">@known_identities</span>[ <span class="ruby-identifier">key</span> ] = { <span class="ruby-identifier">:from</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">:file</span>, <span class="ruby-identifier">:file</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">file</span> }
141: <span class="ruby-keyword kw">rescue</span> <span class="ruby-constant">Exception</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">e</span>
142: <span class="ruby-ivar">@log</span>.<span class="ruby-identifier">warn</span> <span class="ruby-value str">"could not load public key file "</span> <span class="ruby-operator">+</span>
143: <span class="ruby-node">"'#{file}.pub' (#{e.message} [#{e.class}])"</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@log</span>.<span class="ruby-identifier">warn?</span>
144: <span class="ruby-keyword kw">end</span>
145: <span class="ruby-keyword kw">end</span>
146: <span class="ruby-keyword kw">end</span>
147:
148: <span class="ruby-identifier">identities</span>
149: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000153" class="method-detail">
<a name="M000153"></a>
<div class="method-heading">
<a href="#M000153" class="method-signature">
<span class="method-name">sign</span><span class="method-args">( identity, data )</span>
</a>
</div>
<div class="method-description">
<p>
Sign the given data, using the corresponding private key of the given
identity. If the identity was originally obtained from an ssh-agent, then
the ssh-agent will be used to sign the data, otherwise the private key for
the identity will be loaded from disk (if it hasn’t been loaded
already) and will then be used to sign the data.
</p>
<p>
Regardless of the identity’s origin or who does the signing, this
will always return the signature in an SSH2-specified "signature
blob" format.
</p>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000153-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000153-source">
<pre>
<span class="ruby-comment cmt"># File lib/net/ssh/userauth/userkeys.rb, line 184</span>
184: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">sign</span>( <span class="ruby-identifier">identity</span>, <span class="ruby-identifier">data</span> )
185: <span class="ruby-identifier">info</span> = <span class="ruby-identifier">find_identity</span>( <span class="ruby-identifier">identity</span> )
186:
187: <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">info</span>[<span class="ruby-identifier">:key</span>].<span class="ruby-identifier">nil?</span> <span class="ruby-operator">&&</span> <span class="ruby-identifier">info</span>[<span class="ruby-identifier">:from</span>] <span class="ruby-operator">==</span> <span class="ruby-identifier">:file</span>
188: <span class="ruby-keyword kw">begin</span>
189: <span class="ruby-identifier">info</span>[<span class="ruby-identifier">:key</span>] = <span class="ruby-ivar">@keys</span>.<span class="ruby-identifier">load_private_key</span>( <span class="ruby-identifier">info</span>[<span class="ruby-identifier">:file</span>] )
190: <span class="ruby-keyword kw">rescue</span> <span class="ruby-constant">Exception</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">e</span>
191: <span class="ruby-identifier">raise</span> <span class="ruby-constant">UserKeyManagerError</span>,
192: <span class="ruby-value str">"the given identity is known, "</span> <span class="ruby-operator">+</span>
193: <span class="ruby-value str">"but the private key could not be loaded "</span> <span class="ruby-operator">+</span>
194: <span class="ruby-node">"(#{e.message} [#{e.class}])"</span>
195: <span class="ruby-keyword kw">end</span>
196: <span class="ruby-keyword kw">end</span>
197:
198: <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">info</span>[<span class="ruby-identifier">:key</span>]
199: <span class="ruby-identifier">sig_blob</span> = <span class="ruby-ivar">@buffers</span>.<span class="ruby-identifier">writer</span>
200: <span class="ruby-identifier">sig_blob</span>.<span class="ruby-identifier">write_string</span> <span class="ruby-identifier">identity</span>.<span class="ruby-identifier">ssh_type</span>
201: <span class="ruby-identifier">sig_blob</span>.<span class="ruby-identifier">write_string</span> <span class="ruby-identifier">info</span>[<span class="ruby-identifier">:key</span>].<span class="ruby-identifier">ssh_do_sign</span>( <span class="ruby-identifier">data</span>.<span class="ruby-identifier">to_s</span> )
202: <span class="ruby-keyword kw">return</span> <span class="ruby-identifier">sig_blob</span>.<span class="ruby-identifier">to_s</span>
203: <span class="ruby-keyword kw">end</span>
204:
205: <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">info</span>[<span class="ruby-identifier">:from</span>] <span class="ruby-operator">==</span> <span class="ruby-identifier">:agent</span>
206: <span class="ruby-identifier">raise</span> <span class="ruby-constant">UserKeyManagerError</span>,
207: <span class="ruby-value str">"the agent is no longer available"</span> <span class="ruby-keyword kw">unless</span> <span class="ruby-ivar">@agent</span>
208: <span class="ruby-keyword kw">return</span> <span class="ruby-ivar">@agent</span>.<span class="ruby-identifier">sign</span>( <span class="ruby-identifier">identity</span>, <span class="ruby-identifier">data</span>.<span class="ruby-identifier">to_s</span> )
209: <span class="ruby-keyword kw">end</span>
210:
211: <span class="ruby-identifier">raise</span> <span class="ruby-constant">UserKeyManagerError</span>,
212: <span class="ruby-node">"[BUG] can't determine identity origin (#{info.inspect})"</span>
213: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000155" class="method-detail">
<a name="M000155"></a>
<div class="method-heading">
<a href="#M000155" class="method-signature">
<span class="method-name">use_agent=</span><span class="method-args">( use_agent )</span>
</a>
</div>
<div class="method-description">
<p>
Toggles whether the ssh-agent will be used or not. If true, an attempt will
be made to use the ssh-agent. If false, any existing connection to an agent
is closed and the agent will not be used.
</p>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000155-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000155-source">
<pre>
<span class="ruby-comment cmt"># File lib/net/ssh/userauth/userkeys.rb, line 223</span>
223: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">use_agent=</span>( <span class="ruby-identifier">use_agent</span> )
224: <span class="ruby-identifier">close_agent</span> <span class="ruby-keyword kw">if</span> <span class="ruby-operator">!</span><span class="ruby-identifier">use_agent</span>
225: <span class="ruby-ivar">@use_agent</span> = <span class="ruby-identifier">use_agent</span>
226: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000154" class="method-detail">
<a name="M000154"></a>
<div class="method-heading">
<a href="#M000154" class="method-signature">
<span class="method-name">use_agent?</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p>
Identifies whether the ssh-agent will be used or not.
</p>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000154-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000154-source">
<pre>
<span class="ruby-comment cmt"># File lib/net/ssh/userauth/userkeys.rb, line 216</span>
216: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">use_agent?</span>
217: <span class="ruby-ivar">@use_agent</span>
218: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
</div>
</div>
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