<?xml version="1.0" encoding="utf-8"?>
<refentry xml:id="function.rnp-op-sign" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>rnp_op_sign</refname>
  <refpurpose>Perform signing operation on a binary data, return embedded signature(s)</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type class="union"><type>string</type><type>false</type></type><methodname>rnp_op_sign</methodname>
   <methodparam><type>RnpFFI</type><parameter>ffi</parameter></methodparam>
   <methodparam><type>string</type><parameter>data</parameter></methodparam>
   <methodparam><type>array</type><parameter>keys_fp</parameter></methodparam>
   <methodparam choice="opt"><type>array</type><parameter>options</parameter></methodparam>
  </methodsynopsis>
  <para>

  </para>

 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <variablelist>
   <varlistentry>
    <term><parameter>ffi</parameter></term>
    <listitem>
     <para>
      &rnp.parameter.ffi-description;
     </para>
    </listitem>
   </varlistentry>
   <varlistentry>
    <term><parameter>data</parameter></term>
    <listitem>
     <para>
      Data to be signed.
     </para>
    </listitem>
   </varlistentry>
   <varlistentry>
    <term><parameter>keys_fp</parameter></term>
    <listitem>
     <para>
      Array with key fingerprints. At least one key must be provided.
      Keys should be present in <parameter>ffi</parameter>.
     </para>
    </listitem>
   </varlistentry>
   <varlistentry>
    <term><parameter>options</parameter></term>
    <listitem>
     <para>
      An associative array with options.
     </para>
     <informaltable>
      <tgroup cols="2">
       <thead>
        <row>
         <entry>Key</entry>
         <entry>Data type</entry>
         <entry>&Description;</entry>
        </row>
       </thead>
       <tbody>
        <row>
         <entry><literal>"compression_alg"</literal></entry>
         <entry>string</entry>
         <entry>Compression algorithm. Both
	   <literal>"compression_alg"</literal> and <literal>"compression_level"</literal>
	   must be set in order to enable data compression.
	 </entry>
        </row>
        <row>
         <entry><literal>"compression_level"</literal></entry>
         <entry>integer</entry>
         <entry>Compression level, 0-9. 0 disables compression.</entry>
        </row>
        <row>
         <entry><literal>"armor"</literal></entry>
         <entry>boolean</entry>
         <entry>Enable ASCII-armored output. Disabled by default.</entry>
        </row>
        <row>
         <entry><literal>"hash"</literal></entry>
         <entry>string</entry>
         <entry>Set hash algorithm used during signature calculation.</entry>
        </row>
        <row>
         <entry><literal>"creation_time"</literal></entry>
         <entry>integer</entry>
         <entry>Set signature creation time in seconds since Jan, 1 1970 UTC. By default current time is used.</entry>
        </row>
        <row>
         <entry><literal>"expiration_time"</literal></entry>
         <entry>integer</entry>
         <entry>Set signature expiration time in seconds since the creation time. 0 value is used to mark
          signature as non-expiring (default value).</entry>
        </row>
        <row>
         <entry><literal>"file_name"</literal></entry>
         <entry>string</entry>
         <entry>Set input file name.Special value _CONSOLE may be used to mark message
          as 'for your eyes only', i.e. it should not be stored anywhere but only displayed
          to the receiver. Default is the empty string.</entry>
        </row>
        <row>
         <entry><literal>"file_mtime"</literal></entry>
         <entry>integer</entry>
         <entry>Set input file modification date in seconds since Jan, 1 1970 UTC.</entry>
        </row>
       </tbody>
      </tgroup>
     </informaltable>
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Data with embedded signature(s) on success&return.falseforfailure;.
  </para>
 </refsect1>


</refentry>
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