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<title>JSDoc: Class: openpgp_packet_signature</title>
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<h1 class="page-title">Class: openpgp_packet_signature</h1>
<section>
<header>
<h2>
openpgp_packet_signature
</h2>
<div class="class-description">Implementation of the Signature Packet (Tag 2)
RFC4480 5.2:
A Signature packet describes a binding between some public key and
some data. The most common signatures are a signature of a file or a
block of text, and a signature that is a certification of a User ID.</div>
</header>
<article>
<div class="container-overview">
<dt>
<h4 class="name" id="openpgp_packet_signature"><span class="type-signature"></span>new openpgp_packet_signature<span class="signature">()</span><span class="type-signature"></span></h4>
</dt>
<dd>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="openpgp.packet.signature.js.html">packet/openpgp.packet.signature.js</a>, line 27
</li></ul></dd>
</dl>
</dd>
</div>
<h3 class="subsection-title">Methods</h3>
<dl>
<dt>
<h4 class="name" id="getIssuer"><span class="type-signature">&lt;inner> </span>getIssuer<span class="signature">()</span><span class="type-signature"> &rarr; {String}</span></h4>
</dt>
<dd>
<div class="description">
gets the issuer key id of this signature
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="openpgp.packet.signature.js.html">packet/openpgp.packet.signature.js</a>, line 700
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
issuer key id as string (8bytes)
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">String</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="getIssuerKey"><span class="type-signature">&lt;inner> </span>getIssuerKey<span class="signature">()</span><span class="type-signature"> &rarr; {Object}</span></h4>
</dt>
<dd>
<div class="description">
Tries to get the corresponding public key out of the public keyring for the issuer created this signature
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="openpgp.packet.signature.js.html">packet/openpgp.packet.signature.js</a>, line 712
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
{obj: [openpgp_msg_publickey], text: [String]} if found the public key will be returned. null otherwise
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">Object</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="read_packet"><span class="type-signature">&lt;inner> </span>read_packet<span class="signature">(input, position, len)</span><span class="type-signature"> &rarr; {<a href="openpgp_packet_encrypteddata.html">openpgp_packet_encrypteddata</a>}</span></h4>
</dt>
<dd>
<div class="description">
parsing function for a signature packet (tag 2).
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>input</code></td>
<td class="type">
<span class="param-type">String</span>
</td>
<td class="description last">payload of a tag 2 packet</td>
</tr>
<tr>
<td class="name"><code>position</code></td>
<td class="type">
<span class="param-type">Integer</span>
</td>
<td class="description last">position to start reading from the input string</td>
</tr>
<tr>
<td class="name"><code>len</code></td>
<td class="type">
<span class="param-type">Integer</span>
</td>
<td class="description last">length of the packet or the remaining length of input at position</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="openpgp.packet.signature.js.html">packet/openpgp.packet.signature.js</a>, line 78
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
object representation
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type"><a href="openpgp_packet_encrypteddata.html">openpgp_packet_encrypteddata</a></span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="toString"><span class="type-signature">&lt;inner> </span>toString<span class="signature">()</span><span class="type-signature"> &rarr; {String}</span></h4>
</dt>
<dd>
<div class="description">
generates debug output (pretty print)
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="openpgp.packet.signature.js.html">packet/openpgp.packet.signature.js</a>, line 642
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
String which gives some information about the signature packet
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">String</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="verify"><span class="type-signature">&lt;inner> </span>verify<span class="signature">(data, key)</span><span class="type-signature"> &rarr; {boolean}</span></h4>
</dt>
<dd>
<div class="description">
verifys the signature packet. Note: not signature types are implemented
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>data</code></td>
<td class="type">
<span class="param-type">String</span>
</td>
<td class="description last">data which on the signature applies</td>
</tr>
<tr>
<td class="name"><code>key</code></td>
<td class="type">
<span class="param-type"><a href="openpgp_msg_privatekey.html">openpgp_msg_privatekey</a></span>
</td>
<td class="description last">the public key to verify the signature</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="openpgp.packet.signature.js.html">packet/openpgp.packet.signature.js</a>, line 486
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
True if message is verified, else false.
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">boolean</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="write_message_signature"><span class="type-signature">&lt;inner> </span>write_message_signature<span class="signature">(signature_type, data, privatekey)</span><span class="type-signature"> &rarr; {String}</span></h4>
</dt>
<dd>
<div class="description">
creates a string representation of a message signature packet (tag 2).
This can be only used on text data
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>signature_type</code></td>
<td class="type">
<span class="param-type">Integer</span>
</td>
<td class="description last">should be 1 (one)</td>
</tr>
<tr>
<td class="name"><code>data</code></td>
<td class="type">
<span class="param-type">String</span>
</td>
<td class="description last">data to be signed</td>
</tr>
<tr>
<td class="name"><code>privatekey</code></td>
<td class="type">
<span class="param-type"><a href="openpgp_msg_privatekey.html">openpgp_msg_privatekey</a></span>
</td>
<td class="description last">private key used to sign the message. (secMPIs MUST be unlocked)</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="openpgp.packet.signature.js.html">packet/openpgp.packet.signature.js</a>, line 218
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
string representation of a signature packet
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">String</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="write_sub_signature_packet"><span class="type-signature">&lt;inner> </span>write_sub_signature_packet<span class="signature">(type, data)</span><span class="type-signature"> &rarr; {String}</span></h4>
</dt>
<dd>
<div class="description">
creates a string representation of a sub signature packet (See RFC 4880 5.2.3.1)
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>type</code></td>
<td class="type">
<span class="param-type">Integer</span>
</td>
<td class="description last">subpacket signature type. Signature types as described in RFC4880 Section 5.2.3.2</td>
</tr>
<tr>
<td class="name"><code>data</code></td>
<td class="type">
<span class="param-type">String</span>
</td>
<td class="description last">data to be included</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="openpgp.packet.signature.js.html">packet/openpgp.packet.signature.js</a>, line 263
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
a string-representation of a sub signature packet (See RFC 4880 5.2.3.1)
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">String</span>
</dd>
</dl>
</dd>
</dl>
</article>
</section>
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