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<?php
//-----------------------------------------------------------------------------
class ITXAPI_Helper
{
//-----------------------------------------------------------------------------
protected $apikey;
protected $apiurl;
protected $_username;
protected $_password;
//-----------------------------------------------------------------------------
public function __construct($apikey, $apiurl, $username, $password)
{
$username = strtolower( $username ); // Normalize username to lower case.
$this->apikey = $apikey;
$this->apiurl = $apiurl;
$this->_username = $username;
$this->_password = $password;
}
//-----------------------------------------------------------------------------
protected function format_api_url($resource, $params = array())
{
$params['apikey'] = $this->apikey;
return sprintf('%s/%s?%s', $this->apiurl, $resource, http_build_query($params, null, '&'));
}
//-----------------------------------------------------------------------------
protected function hmac_SHA1($key, $data, $blocksize = 64)
{
if (strlen($key) > $blocksize) $key = pack('H*', sha1($key));
$key = str_pad($key, $blocksize, chr(0x00));
$ipad = str_repeat(chr(0x36), $blocksize);
$opad = str_repeat(chr(0x5c), $blocksize);
$hmac = pack( 'H*', sha1( ($key ^ $opad) . pack( 'H*', sha1( ($key ^ $ipad) . $data )) ));
return base64_encode($hmac);
}
//-----------------------------------------------------------------------------
public static function get_password_hash($username, $password)
{
$username = strtolower( $username ); // Normalize username to lower case.
return sha1('itxapi'.$username.$password);
}
//-----------------------------------------------------------------------------
protected function format_signed_url($resource, $username, $password, $params = array(), $expires = 0, $type = 'GET')
{
$username = strtolower( $username ); // Normalize username to lower case.
if($expires == 0)
$expires = time() + 720; // 12min window for now to account for server times being off.
$signed_parts = array('apikey'=>$this->apikey,
'request'=>strtoupper($type),
'expires'=>intval($expires),
'resource'=>$resource,
'subscriber'=>$username,
'password'=>$password);
if(count($params))
foreach($params as $key=>$param)
$signed_parts[$key] = $param;
$signature = self::hmac_SHA1($signed_parts['password'], implode("\n", $signed_parts));
unset($signed_parts['request']);
unset($signed_parts['resource']);
unset($signed_parts['password']);
$signed_parts['signature'] = $signature;
return $this->format_api_url($resource, $signed_parts);
}
//-----------------------------------------------------------------------------
public function get_upload_url($src_file, $type = 'request', $dest_file = null)
{
if($type!='abort-all')
$size = filesize($src_file);
else
$size = 0;
$hash = md5('itxapi::stash::upload');
if(empty($dest_file))
$dest_file = $src_file;
switch($type)
{
case 'request': return $this->format_signed_url('stash/upload', $this->_username, $this->_password, array('filename'=>base64_encode($dest_file), 'hash'=>$hash, 'size'=>$size));
case 'done': return $this->format_signed_url('stash/upload-done', $this->_username, $this->_password, array('filename'=>base64_encode($dest_file), 'hash'=>$hash, 'size'=>$size));
case 'abort': return $this->format_signed_url('stash/upload-abort', $this->_username, $this->_password, array('filename'=>base64_encode($dest_file), 'hash'=>$hash, 'size'=>$size));
case 'abort-all': return $this->format_signed_url('stash/upload-abort-all', $this->_username, $this->_password);
default: throw new Exception('Unknown type of upload url');
}
}
//-----------------------------------------------------------------------------
public function get_manage_url()
{
return $this->format_signed_url('stash/manage', $this->_username, $this->_password);
}
//-----------------------------------------------------------------------------
public function get_quota_url()
{
return $this->format_signed_url('stash/quota', $this->_username, $this->_password);
}
//-----------------------------------------------------------------------------
public function get_files_url()
{
return $this->format_signed_url('stash/files', $this->_username, $this->_password);
}
//-----------------------------------------------------------------------------
}
//-----------------------------------------------------------------------------
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