/**
* Handler for message encryption
*
* @param Mail_mime Original message
* @param int Encryption mode
* @param bool Is draft-save action - use only sender's key for encryption
*
* @return enigma_error On error returns error object
*/
function encrypt_message(&$message, $mode = null, $is_draft = false)
{
$mime = new enigma_mime_message($message, enigma_mime_message::PGP_ENCRYPTED);
// always use sender's key
$recipients = array($mime->getFromAddress());
// if it's not a draft we add all recipients' keys
if (!$is_draft) {
$recipients = array_merge($recipients, $mime->getRecipients());
}
if (empty($recipients)) {
return new enigma_error(enigma_error::KEYNOTFOUND);
}
$recipients = array_unique($recipients);
// find recipient public keys
foreach ((array) $recipients as $email) {
$key = $this->find_key($email);
if (empty($key)) {
return new enigma_error(enigma_error::KEYNOTFOUND, '', array('missing' => $email));
}
$keys[] = $key->id;
}
// select mode
switch ($mode) {
case self::ENCRYPT_MODE_BODY:
$encrypt_mode = $mode;
break;
case self::ENCRYPT_MODE_MIME:
$encrypt_mode = $mode;
break;
default:
$encrypt_mode = $mime->isMultipart() ? self::ENCRYPT_MODE_MIME : self::ENCRYPT_MODE_BODY;
}
// get message body
if ($encrypt_mode == self::ENCRYPT_MODE_BODY) {
// in this mode we'll replace text part
// with the one containing encrypted message
$body = $message->getTXTBody();
} else {
// here we'll build PGP/MIME message
$body = $mime->getOrigBody();
}
// sign the body
$result = $this->pgp_encrypt($body, $keys);
if ($result !== true) {
return $result;
}
// replace message body
if ($encrypt_mode == self::ENCRYPT_MODE_BODY) {
$message->setTXTBody($body);
} else {
$mime->setPGPEncryptedBody($body);
$message = $mime;
}
}
/**
* Handler for message encryption
*
* @param Mail_mime Original message
* @param int Encryption mode
* @param bool Is draft-save action - use only sender's key for encryption
*
* @return enigma_error On error returns error object
*/
function encrypt_message(&$message, $mode = null, $is_draft = false)
{
$mime = new enigma_mime_message($message, enigma_mime_message::PGP_ENCRYPTED);
// always use sender's key
$from = $mime->getFromAddress();
// check senders key for signing
if ($mode & self::ENCRYPT_MODE_SIGN) {
$sign_key = $this->find_key($from, true);
if (empty($sign_key)) {
return new enigma_error(enigma_error::KEYNOTFOUND);
}
// check if we have password for this key
$passwords = $this->get_passwords();
$sign_pass = $passwords[$sign_key->id];
if ($sign_pass === null) {
// ask for password
$error = array('missing' => array($sign_key->id => $sign_key->name));
return new enigma_error(enigma_error::BADPASS, '', $error);
}
$sign_key->password = $sign_pass;
}
$recipients = array($from);
// if it's not a draft we add all recipients' keys
if (!$is_draft) {
$recipients = array_merge($recipients, $mime->getRecipients());
}
if (empty($recipients)) {
return new enigma_error(enigma_error::KEYNOTFOUND);
}
$recipients = array_unique($recipients);
// find recipient public keys
foreach ((array) $recipients as $email) {
if ($email == $from && $sign_key) {
$key = $sign_key;
} else {
$key = $this->find_key($email);
}
if (empty($key)) {
return new enigma_error(enigma_error::KEYNOTFOUND, '', array('missing' => $email));
}
$keys[] = $key;
}
// select mode
if ($mode & self::ENCRYPT_MODE_BODY) {
$encrypt_mode = $mode;
} else {
if ($mode & self::ENCRYPT_MODE_MIME) {
$encrypt_mode = $mode;
} else {
$encrypt_mode = $mime->isMultipart() ? self::ENCRYPT_MODE_MIME : self::ENCRYPT_MODE_BODY;
}
}
// get message body
if ($encrypt_mode == self::ENCRYPT_MODE_BODY) {
// in this mode we'll replace text part
// with the one containing encrypted message
$body = $message->getTXTBody();
} else {
// here we'll build PGP/MIME message
$body = $mime->getOrigBody();
}
// sign the body
$result = $this->pgp_encrypt($body, $keys, $sign_key);
if ($result !== true) {
if ($result->getCode() == enigma_error::BADPASS) {
// ask for password
$error = array('bad' => array($sign_key->id => $sign_key->name));
return new enigma_error(enigma_error::BADPASS, '', $error);
}
return $result;
}
// replace message body
if ($encrypt_mode == self::ENCRYPT_MODE_BODY) {
$message->setTXTBody($body);
} else {
$mime->setPGPEncryptedBody($body);
$message = $mime;
}
}