/**
* Surcharge la méthode __toString() de la classe parente.
* Signe et/ou chiffre l’email résultant à l’aide du programme GnuPG.
*
* @access public
* @return string
*/
public function __toString()
{
if (!is_executable($this->gpg_bin)) {
throw new Exception(sprintf("[%s] is not a valid executable.", $this->gpg_bin));
}
if (!(file_exists($this->logfile) && is_writable($this->logfile) || is_writable(dirname($this->logfile)))) {
throw new Exception(sprintf("Unable to write log file [%s].", $this->logfile));
}
$tmpdir = escapeshellarg($this->tmpdir);
$logfile = escapeshellcmd($this->logfile);
$digest_algo = escapeshellarg($this->digest_algo);
$gpg_cmd = escapeshellcmd($this->gpg_bin);
$gpg_cmd .= " --no-verbose --no-tty --batch --textmode --armor" . " --always-trust --comment \"Using GnuPG with Wamailer\"";
if (!is_null($this->homedir)) {
$gpg_cmd .= sprintf(" --homedir %s", escapeshellarg($this->homedir));
}
/**
* Les emails signés et/ou chiffrés doivent être restreints
* aux caractères 7bit uniquement (us-ascii)
*
* @see RFC 3156#3 - Content-Transfer-Encoding restrictions
*/
if ($this->_sign || $this->_encrypt) {
if (!is_null($this->_textPart)) {
$this->_textPart->encoding = 'quoted-printable';
}
if (!is_null($this->_htmlPart)) {
$this->_htmlPart->encoding = 'quoted-printable';
}
}
parent::__toString();
$headers = $this->headers_txt;
$message = $this->message_txt;
$tmpfile = tempnam($this->tmpdir, 'wa');
file_put_contents($tmpfile, $message);
//
// Le message doit être chiffré (+ éventuellement signé)
//
if ($this->_encrypt) {
if (!is_null($this->cipher_algo)) {
$gpc_cmd .= sprintf(' --cipher-algo %s', escapeshellarg($this->cipher_algo));
}
if ($this->encryption == self::A_ENCRYPTION) {
if (count($this->recipients) == 0) {
throw new Exception("No recipient specified!");
}
foreach ($this->recipients as $recipient) {
$gpg_cmd .= sprintf(' --recipient %s', escapeshellarg($recipient));
}
if ($this->_sign) {
if (!is_null($this->secretkey)) {
$gpg_cmd .= sprintf(" --local-user %s", escapeshellarg($this->secretkey));
}
if (!is_null($this->passphrase)) {
$gpg_cmd = sprintf("echo %s | %s --passphrase-fd 0", escapeshellarg($this->passphrase), $gpg_cmd);
}
$gpg_cmd = sprintf("%s --output - --digest-algo %s --encrypt --sign %s", $gpg_cmd, $digest_algo, escapeshellarg($tmpfile));
} else {
$gpg_cmd = sprintf("%s --output - --encrypt %s", $gpg_cmd, escapeshellarg($tmpfile));
}
} else {
$password = escapeshellarg($this->password);
if ($this->_sign) {
if (!is_null($this->secretkey)) {
$gpg_cmd .= sprintf(" --local-user %s", escapeshellarg($this->secretkey));
}
$gpg_cmd = sprintf("echo %s | %s --passphrase-fd 0" . " --output - --digest-algo %s --symmetric --sign %s", $password, $gpg_cmd, $digest_algo, escapeshellarg($tmpfile));
} else {
$gpg_cmd = sprintf("echo %s | %s --passphrase-fd 0" . " --output - --symmetric %s", $password, $gpg_cmd, escapeshellarg($tmpfile));
}
}
exec("{$gpg_cmd} 2>{$logfile}", $output, $result);
if ($result !== 0) {
unlink($tmpfile);
throw new Exception("Cannot encrypt email (GPG error)");
}
$encrypted_msg = implode("\r\n", $output);
$gpg_sub1 = new Mime_Part();
$gpg_sub1->headers->set('Content-Type', 'application/pgp-encrypted');
$gpg_sub1->headers->set('Content-Description', 'PGP/MIME version identification');
$gpg_sub1->body = 'Version: 1';
$gpg_sub2 = new Mime_Part();
$gpg_sub2->headers->set('Content-Type', 'application/octet-stream');
$gpg_sub2->headers->get('Content-Type')->param('name', 'encrypted.asc');
$gpg_sub2->headers->set('Content-Description', 'OpenPGP encrypted message');
$gpg_sub2->headers->set('Content-Disposition', 'inline');
$gpg_sub2->headers->get('Content-Disposition')->param('filename', 'encrypted.asc');
$gpg_sub2->body = $encrypted_msg;
$gpg_sub2->wraptext = false;
//
// Bloc MIME global
//
$gpg = new Mime_Part();
$gpg->headers->set('Content-Type', 'multipart/encrypted');
$gpg->headers->get('Content-Type')->param('protocol', 'application/pgp-encrypted');
$gpg->body = 'This is an OpenPGP/MIME encrypted message (RFC 2440 and 3156)';
$gpg->addSubPart($gpg_sub1);
$gpg->addSubPart($gpg_sub2);
$message = $gpg->__toString();
} else {
if ($this->_sign) {
if (!is_null($this->secretkey)) {
$gpg_cmd .= sprintf(" --local-user %s", escapeshellarg($this->secretkey));
}
if (!is_null($this->passphrase)) {
$gpg_cmd = sprintf("echo %s | %s --passphrase-fd 0", escapeshellarg($this->passphrase), $gpg_cmd);
}
$gpg_cmd = sprintf("%s --output - --digest-algo %s --detach-sign %s", $gpg_cmd, $digest_algo, escapeshellarg($tmpfile));
exec("{$gpg_cmd} 2>{$logfile}", $output, $result);
if ($result !== 0) {
unlink($tmpfile);
throw new Exception("Cannot sign email (GPG error)");
}
$signature = implode("\r\n", $output);
$gpg_sub = new Mime_Part();
$gpg_sub->headers->set('Content-Type', 'application/pgp-signature');
$gpg_sub->headers->get('Content-Type')->param('name', 'signature.asc');
$gpg_sub->headers->set('Content-Description', 'OpenPGP digital signature');
$gpg_sub->headers->set('Content-Disposition', 'attachment');
$gpg_sub->headers->get('Content-Disposition')->param('filename', 'signature.asc');
$gpg_sub->body = $signature;
$gpg_sub->wraptext = false;
//
// Bloc MIME global
//
$gpg = new Mime_Part();
$gpg->headers->set('Content-Type', 'multipart/signed');
$gpg->headers->get('Content-Type')->param('micalg', "pgp-{$this->digest_algo}");
$gpg->headers->get('Content-Type')->param('protocol', 'application/pgp-signature');
$gpg->body = "This is an OpenPGP/MIME signed message (RFC 2440 and 3156).";
$gpg->addSubPart($message);
$gpg->addSubPart($gpg_sub);
$message = $gpg->__toString();
}
}
unlink($tmpfile);
return $headers . $message;
}
/**
* Retourne l'email sous forme de chaîne formatée prète à l'envoi
*
* @access public
* @return string
*/
public function __toString()
{
$this->headers->set('Date', date(DATE_RFC2822));
$this->headers->set('MIME-Version', '1.0');
$this->headers->set('Message-ID', sprintf('<%s@%s>', md5(microtime() . rand()), MAILER_HOSTNAME));
$this->headers_txt = $this->headers->__toString();
if (!empty($this->message_txt)) {
return $this->headers_txt . $this->message_txt;
}
$rootPart = null;
$attachParts = $this->_attachParts;
if (!is_null($this->_htmlPart)) {
$rootPart = $this->_htmlPart;
if (!is_null($this->_textPart)) {
$rootPart = new Mime_Part();
$rootPart->addSubPart($this->_textPart);
$rootPart->addSubPart($this->_htmlPart);
$rootPart->headers->set('Content-Type', 'multipart/alternative');
}
$embedParts = array();
foreach ($attachParts as &$attach) {
if ($attach->headers->get('Content-ID') == null) {
$name = $attach->headers->get('Content-Type')->param('name');
$regexp = '/<([^>]+=\\s*)(["\'])cid:' . preg_quote($name, '/') . '\\2([^>]*)>/S';
if (!preg_match($regexp, $this->_htmlPart->body)) {
continue;
}
$cid = md5(microtime()) . '@' . MAILER_HOSTNAME;
$this->_htmlPart->body = preg_replace($regexp, '<\\1\\2cid:' . $cid . '\\2\\3>', $this->_htmlPart->body);
$attach->headers->set('Content-ID', "<{$cid}>");
}
array_push($embedParts, $attach);
$attach = null;
}
if (count($embedParts) > 0) {
$embedPart = new Mime_Part();
$embedPart->addSubPart($rootPart);
$embedPart->addSubPart($embedParts);
$embedPart->headers->set('Content-Type', 'multipart/related');
$embedPart->headers->get('Content-Type')->param('type', $rootPart->headers->get('Content-Type')->value);
$rootPart = $embedPart;
}
} else {
if (!is_null($this->_textPart)) {
$rootPart = $this->_textPart;
}
}
// filtrage nécessaire après la boucle de traitement des objets embarqués plus haut
$attachParts = array_filter($attachParts);
if (count($attachParts) > 0) {
if (!is_null($rootPart)) {
$mixedPart = new Mime_Part();
$mixedPart->headers->set('Content-Type', 'multipart/mixed');
$mixedPart->addSubPart($rootPart);
$mixedPart->addSubPart($attachParts);
} else {
if (count($attachParts) == 1) {
$mixedPart = $attachParts[0];
} else {
$mixedPart = new Mime_Part();
$mixedPart->headers->set('Content-Type', 'multipart/mixed');
$mixedPart->addSubPart($attachParts);
}
}
$rootPart = $mixedPart;
}
//
// Le corps d'un email est optionnel (cf. RFC 2822#3.5)
//
if (!is_null($rootPart)) {
//
// Par convention, un bref message informatif est ajouté aux emails
// composés de plusieurs sous-parties, au cas où le client mail
// ne supporterait pas ceux-ci…
//
if (strncasecmp($rootPart->headers->get('Content-Type')->value, 'multipart', 9) == 0) {
$rootPart->body = "This is a multi-part message in MIME format.";
}
$this->message_txt = $rootPart->__toString();
}
return $this->headers_txt . $this->message_txt;
}