<HTML ><HEAD ><TITLE >openssl_pkcs7_sign</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="PHP Manual" HREF="index.html"><LINK REL="UP" TITLE="OpenSSL functions" HREF="ref.openssl.html"><LINK REL="PREVIOUS" TITLE="openssl_pkcs7_encrypt" HREF="function.openssl-pkcs7-encrypt.html"><LINK REL="NEXT" TITLE="openssl_pkcs7_verify" HREF="function.openssl-pkcs7-verify.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-1"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.openssl-pkcs7-encrypt.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.openssl-pkcs7-verify.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.openssl-pkcs7-sign" ></A >openssl_pkcs7_sign</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN68285" ></A ><P > (PHP 4 >= 4.0.6)</P >openssl_pkcs7_sign -- sign an S/MIME message</DIV ><DIV CLASS="refsect1" ><A NAME="AEN68288" ></A ><H2 >Description</H2 >bool <B CLASS="methodname" >openssl_pkcs7_sign</B > ( string infilename, string outfilename, mixed signcert, mixed privkey, array headers [, long flags [, string extracertsfilename]])<BR ></BR ><P > <B CLASS="function" >openssl_pkcs7_sign()</B > takes the contents of the file named <TT CLASS="parameter" ><I >infilename</I ></TT > and signs them using the certificate and it's matching private key specified by <TT CLASS="parameter" ><I >signcert</I ></TT > and <TT CLASS="parameter" ><I >privkey</I ></TT > parameters. </P ><P ><TT CLASS="parameter" ><I >headers</I ></TT > is an array of headers that will be prepended to the data after it has been signed (see <A HREF="function.openssl-pkcs7-encrypt.html" ><B CLASS="function" >openssl_pkcs7_encrypt()</B ></A > for more information about the format of this parameter. </P ><P > <TT CLASS="parameter" ><I >flags</I ></TT > can be used to alter the output - see <A HREF="ref.openssl.html#openssl.pkcs7.flags" >PKCS7 constants</A > - if not specified, it defaults to PKCS7_DETACHED. </P ><P > <TT CLASS="parameter" ><I >extracerts</I ></TT > specifies the name of a file containing a bunch of extra certificates to include in the signature which can for example be used to help the recipient to verify the certificate that you used. </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN68328" ></A ><P ><B >Example 1. <B CLASS="function" >openssl_pkcs7_sign()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="php" >// the message you want to sign so that recipient can be sure it was you that // sent it $data = <<<EOD You have my authorization to spend $10,000 on dinner expenses. The CEO EOD; // save message to file $fp = fopen("msg.txt", "w"); fwrite($fp, $data); fclose($fp); // encrypt it if (openssl_pkcs7_sign("msg.txt", "signed.txt", "mycert.pem", array("mycert.pem", "mypassphrase"), array("To" => "joes@sales.com", // keyed syntax "From: HQ <ceo@sales.com>", // indexed syntax "Subject" => "Eyes only")) { // message signed - send it! exec(ini_get("sendmail_path") . " < signed.txt"); }</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Note: </B >This function was added in 4.0.6.</P ></BLOCKQUOTE ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.openssl-pkcs7-encrypt.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.openssl-pkcs7-verify.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >openssl_pkcs7_encrypt</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.openssl.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >openssl_pkcs7_verify</TD ></TR ></TABLE ></DIV ></BODY ></HTML >