<?php
|
|
/**
|
+-------------------------------------------------------------------------+
|
| GnuPG (PGP) driver for the Enigma Plugin |
|
| |
|
| Copyright (C) 2010-2015 The Roundcube Dev Team |
|
| |
|
| Licensed under the GNU General Public License version 3 or |
|
| any later version with exceptions for skins & plugins. |
|
| See the README file for a full license statement. |
|
| |
|
+-------------------------------------------------------------------------+
|
| Author: Aleksander Machniak <alec@alec.pl> |
|
+-------------------------------------------------------------------------+
|
*/
|
|
require_once 'Crypt/GPG.php';
|
|
class enigma_driver_gnupg extends enigma_driver
|
{
|
protected $rc;
|
protected $gpg;
|
protected $homedir;
|
protected $user;
|
|
|
function __construct($user)
|
{
|
$this->rc = rcmail::get_instance();
|
$this->user = $user;
|
}
|
|
/**
|
* Driver initialization and environment checking.
|
* Should only return critical errors.
|
*
|
* @return mixed NULL on success, enigma_error on failure
|
*/
|
function init()
|
{
|
$homedir = $this->rc->config->get('enigma_pgp_homedir', INSTALL_PATH . 'plugins/enigma/home');
|
$debug = $this->rc->config->get('enigma_debug');
|
|
if (!$homedir)
|
return new enigma_error(enigma_error::INTERNAL,
|
"Option 'enigma_pgp_homedir' not specified");
|
|
// check if homedir exists (create it if not) and is readable
|
if (!file_exists($homedir))
|
return new enigma_error(enigma_error::INTERNAL,
|
"Keys directory doesn't exists: $homedir");
|
if (!is_writable($homedir))
|
return new enigma_error(enigma_error::INTERNAL,
|
"Keys directory isn't writeable: $homedir");
|
|
$homedir = $homedir . '/' . $this->user;
|
|
// check if user's homedir exists (create it if not) and is readable
|
if (!file_exists($homedir))
|
mkdir($homedir, 0700);
|
|
if (!file_exists($homedir))
|
return new enigma_error(enigma_error::INTERNAL,
|
"Unable to create keys directory: $homedir");
|
if (!is_writable($homedir))
|
return new enigma_error(enigma_error::INTERNAL,
|
"Unable to write to keys directory: $homedir");
|
|
$this->homedir = $homedir;
|
|
// Create Crypt_GPG object
|
try {
|
$this->gpg = new Crypt_GPG(array(
|
'homedir' => $this->homedir,
|
// 'binary' => '/usr/bin/gpg2',
|
'debug' => $debug ? array($this, 'debug') : false,
|
));
|
}
|
catch (Exception $e) {
|
return $this->get_error_from_exception($e);
|
}
|
}
|
|
/**
|
* Encryption.
|
*
|
* @param string Message body
|
* @param array List of key-password mapping
|
*
|
* @return mixed Encrypted message or enigma_error on failure
|
*/
|
function encrypt($text, $keys)
|
{
|
try {
|
foreach ($keys as $key) {
|
$this->gpg->addEncryptKey($key);
|
}
|
|
return $this->gpg->encrypt($text, true);
|
}
|
catch (Exception $e) {
|
return $this->get_error_from_exception($e);
|
}
|
}
|
|
/**
|
* Decrypt a message
|
*
|
* @param string Encrypted message
|
* @param array List of key-password mapping
|
*
|
* @return mixed Decrypted message or enigma_error on failure
|
*/
|
function decrypt($text, $keys = array())
|
{
|
try {
|
foreach ($keys as $key => $password) {
|
$this->gpg->addDecryptKey($key, $password);
|
}
|
|
return $this->gpg->decrypt($text);
|
}
|
catch (Exception $e) {
|
return $this->get_error_from_exception($e);
|
}
|
}
|
|
/**
|
* Signing.
|
*
|
* @param string Message body
|
* @param string Key ID
|
* @param string Key password
|
* @param int Signing mode (enigma_engine::SIGN_*)
|
*
|
* @return mixed True on success or enigma_error on failure
|
*/
|
function sign($text, $key, $passwd, $mode = null)
|
{
|
try {
|
$this->gpg->addSignKey($key, $passwd);
|
return $this->gpg->sign($text, $mode, CRYPT_GPG::ARMOR_ASCII, true);
|
}
|
catch (Exception $e) {
|
return $this->get_error_from_exception($e);
|
}
|
}
|
|
/**
|
* Signature verification.
|
*
|
* @param string Message body
|
* @param string Signature, if message is of type PGP/MIME and body doesn't contain it
|
*
|
* @return mixed Signature information (enigma_signature) or enigma_error
|
*/
|
function verify($text, $signature)
|
{
|
try {
|
$verified = $this->gpg->verify($text, $signature);
|
return $this->parse_signature($verified[0]);
|
}
|
catch (Exception $e) {
|
return $this->get_error_from_exception($e);
|
}
|
}
|
|
/**
|
* Key file import.
|
*
|
* @param string File name or file content
|
* @param bollean True if first argument is a filename
|
*
|
* @return mixed Import status array or enigma_error
|
*/
|
public function import($content, $isfile=false)
|
{
|
try {
|
if ($isfile)
|
return $this->gpg->importKeyFile($content);
|
else
|
return $this->gpg->importKey($content);
|
}
|
catch (Exception $e) {
|
return $this->get_error_from_exception($e);
|
}
|
}
|
|
/**
|
* Key export.
|
*
|
* @param string Key ID
|
*
|
* @return mixed Key content or enigma_error
|
*/
|
public function export($keyid)
|
{
|
try {
|
return $this->gpg->exportPublicKey($keyid, true);
|
}
|
catch (Exception $e) {
|
return $this->get_error_from_exception($e);
|
}
|
}
|
|
/**
|
* Keys listing.
|
*
|
* @param string Optional pattern for key ID, user ID or fingerprint
|
*
|
* @return mixed Array of enigma_key objects or enigma_error
|
*/
|
public function list_keys($pattern='')
|
{
|
try {
|
$keys = $this->gpg->getKeys($pattern);
|
$result = array();
|
|
foreach ($keys as $idx => $key) {
|
$result[] = $this->parse_key($key);
|
unset($keys[$idx]);
|
}
|
|
return $result;
|
}
|
catch (Exception $e) {
|
return $this->get_error_from_exception($e);
|
}
|
}
|
|
/**
|
* Single key information.
|
*
|
* @param string Key ID, user ID or fingerprint
|
*
|
* @return mixed Key (enigma_key) object or enigma_error
|
*/
|
public function get_key($keyid)
|
{
|
$list = $this->list_keys($keyid);
|
|
if (is_array($list)) {
|
return $list[key($list)];
|
}
|
|
// error
|
return $list;
|
}
|
|
/**
|
* Key pair generation.
|
*
|
* @param array Key/User data (user, email, password, size)
|
*
|
* @return mixed Key (enigma_key) object or enigma_error
|
*/
|
public function gen_key($data)
|
{
|
try {
|
$debug = $this->rc->config->get('enigma_debug');
|
$keygen = new Crypt_GPG_KeyGenerator(array(
|
'homedir' => $this->homedir,
|
// 'binary' => '/usr/bin/gpg2',
|
'debug' => $debug ? array($this, 'debug') : false,
|
));
|
|
$key = $keygen
|
->setExpirationDate(0)
|
->setPassphrase($data['password'])
|
->generateKey($data['user'], $data['email']);
|
|
return $this->parse_key($key);
|
}
|
catch (Exception $e) {
|
return $this->get_error_from_exception($e);
|
}
|
}
|
|
/**
|
* Key deletion.
|
*
|
* @param string Key ID
|
*
|
* @return mixed True on success or enigma_error
|
*/
|
public function delete_key($keyid)
|
{
|
// delete public key
|
$result = $this->delete_pubkey($keyid);
|
|
// error handling
|
if ($result !== true) {
|
$code = $result->getCode();
|
|
// if not found, delete private key
|
if ($code == enigma_error::KEYNOTFOUND) {
|
$result = $this->delete_privkey($keyid);
|
}
|
// need to delete private key first
|
else if ($code == enigma_error::DELKEY) {
|
$key = $this->get_key($keyid);
|
for ($i = count($key->subkeys) - 1; $i >= 0; $i--) {
|
$type = ($key->subkeys[$i]->usage & enigma_key::CAN_ENCRYPT) ? 'priv' : 'pub';
|
$result = $this->{'delete_' . $type . 'key'}($key->subkeys[$i]->id);
|
if ($result !== true) {
|
return $result;
|
}
|
}
|
}
|
}
|
|
return $result;
|
}
|
|
/**
|
* Private key deletion.
|
*/
|
protected function delete_privkey($keyid)
|
{
|
try {
|
$this->gpg->deletePrivateKey($keyid);
|
return true;
|
}
|
catch (Exception $e) {
|
return $this->get_error_from_exception($e);
|
}
|
}
|
|
/**
|
* Public key deletion.
|
*/
|
protected function delete_pubkey($keyid)
|
{
|
try {
|
$this->gpg->deletePublicKey($keyid);
|
return true;
|
}
|
catch (Exception $e) {
|
return $this->get_error_from_exception($e);
|
}
|
}
|
|
/**
|
* Converts Crypt_GPG exception into Enigma's error object
|
*
|
* @param mixed Exception object
|
*
|
* @return enigma_error Error object
|
*/
|
protected function get_error_from_exception($e)
|
{
|
$data = array();
|
|
if ($e instanceof Crypt_GPG_KeyNotFoundException) {
|
$error = enigma_error::KEYNOTFOUND;
|
$data['id'] = $e->getKeyId();
|
}
|
else if ($e instanceof Crypt_GPG_BadPassphraseException) {
|
$error = enigma_error::BADPASS;
|
$data['bad'] = $e->getBadPassphrases();
|
$data['missing'] = $e->getMissingPassphrases();
|
}
|
else if ($e instanceof Crypt_GPG_NoDataException) {
|
$error = enigma_error::NODATA;
|
}
|
else if ($e instanceof Crypt_GPG_DeletePrivateKeyException) {
|
$error = enigma_error::DELKEY;
|
}
|
else {
|
$error = enigma_error::INTERNAL;
|
}
|
|
$msg = $e->getMessage();
|
|
return new enigma_error($error, $msg, $data);
|
}
|
|
/**
|
* Converts Crypt_GPG_Signature object into Enigma's signature object
|
*
|
* @param Crypt_GPG_Signature Signature object
|
*
|
* @return enigma_signature Signature object
|
*/
|
protected function parse_signature($sig)
|
{
|
$user = $sig->getUserId();
|
|
$data = new enigma_signature();
|
$data->id = $sig->getId();
|
$data->valid = $sig->isValid();
|
$data->fingerprint = $sig->getKeyFingerprint();
|
$data->created = $sig->getCreationDate();
|
$data->expires = $sig->getExpirationDate();
|
$data->name = $user->getName();
|
$data->comment = $user->getComment();
|
$data->email = $user->getEmail();
|
|
return $data;
|
}
|
|
/**
|
* Converts Crypt_GPG_Key object into Enigma's key object
|
*
|
* @param Crypt_GPG_Key Key object
|
*
|
* @return enigma_key Key object
|
*/
|
protected function parse_key($key)
|
{
|
$ekey = new enigma_key();
|
|
foreach ($key->getUserIds() as $idx => $user) {
|
$id = new enigma_userid();
|
$id->name = $user->getName();
|
$id->comment = $user->getComment();
|
$id->email = $user->getEmail();
|
$id->valid = $user->isValid();
|
$id->revoked = $user->isRevoked();
|
|
$ekey->users[$idx] = $id;
|
}
|
|
$ekey->name = trim($ekey->users[0]->name . ' <' . $ekey->users[0]->email . '>');
|
|
foreach ($key->getSubKeys() as $idx => $subkey) {
|
$skey = new enigma_subkey();
|
$skey->id = $subkey->getId();
|
$skey->revoked = $subkey->isRevoked();
|
$skey->created = $subkey->getCreationDate();
|
$skey->expires = $subkey->getExpirationDate();
|
$skey->fingerprint = $subkey->getFingerprint();
|
$skey->has_private = $subkey->hasPrivate();
|
$skey->algorithm = $subkey->getAlgorithm();
|
$skey->length = $subkey->getLength();
|
$skey->usage = $subkey->usage();
|
|
$ekey->subkeys[$idx] = $skey;
|
};
|
|
$ekey->id = $ekey->subkeys[0]->id;
|
|
return $ekey;
|
}
|
|
/**
|
* Write debug info from Crypt_GPG to logs/enigma
|
*/
|
public function debug($line)
|
{
|
rcube::write_log('enigma', 'GPG: ' . $line);
|
}
|
}
|
