php man page for openssl_pkcs7_sign

OPENSSL_PKCS7_SIGN(3)							 1						     OPENSSL_PKCS7_SIGN(3)

openssl_pkcs7_sign - Sign an S/MIME message

SYNOPSIS
       bool  openssl_pkcs7_sign  (string   $infilename,  string   $outfilename, mixed  $signcert, mixed  $privkey, array  $headers, [int  $flags =
       PKCS7_DETACHED], [string  $extracerts])

DESCRIPTION
       openssl_pkcs7_sign(3) takes the contents of the file named $infilename and signs them using the certificate and its  matching  private  key
       specified by $signcert and $privkey parameters.

PARAMETERS
	      o $infilename
		-

	      o $outfilename
		-

	      o $signcert
		-

	      o $privkey
		-

	      o $headers
		-$headers  is  an  array  of headers that will be prepended to the data after it has been signed (see openssl_pkcs7_encrypt(3) for
		more information about the format of this parameter).

	      o $flags
		-$flags can be used to alter the output - see PKCS7 constants.

	      o $extracerts
		-$extracerts specifies the name of a file containing a bunch of extra certificates to include in the signature which can for exam-
		ple be used to help the recipient to verify the certificate that you used.

RETURN VALUES
	Returns TRUE on success or FALSE on failure.

EXAMPLES
       Example #1

	      openssl_pkcs7_sign(3) example

	      <?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("file://mycert.pem", "mypassphrase"),
		  array("To" => "joes@example.com", // keyed syntax
			"From: HQ <ceo@example.com>", // indexed syntax
			"Subject" => "Eyes only")
		  )) {
		  // message signed - send it!
		  exec(ini_get("sendmail_path") . " < signed.txt");
	      }
	      ?>

PHP Documentation Group 												     OPENSSL_PKCS7_SIGN(3)