Decrypts blob data for standard images and videos.
| public decryptECB ( data $data ) : data | ||
| $data | data | The data to decrypt. |
| return | data | The decrypted data. |
/**
* Downloads a snap.
*
* @param string $id
* The snap ID.
*
* @return mixed
* The snap data or FALSE on failure.
*/
public function getMedia($id)
{
// Make sure we're logged in and have a valid access token.
if (!$this->auth_token || !$this->username) {
return FALSE;
}
$timestamp = parent::timestamp();
$result = parent::post('/blob', array('id' => $id, 'timestamp' => $timestamp, 'username' => $this->username), array($this->auth_token, $timestamp));
if (parent::isMedia(substr($result, 0, 2))) {
return $result;
} else {
$result = parent::decryptECB($result);
if (parent::isMedia(substr($result, 0, 2))) {
return $result;
}
}
return FALSE;
}
/**
* Downloads a snap.
*
* @param string $id
* The snap ID.
*
* @return mixed
* The snap data or FALSE on failure.
* Snap data can returned as an Array of more than one file.
* array(
* overlay~zip-CE6F660A-4A9F-4BD6-8183-245C9C75B8A0 => overlay_file_data,
* media~zip-CE6F660A-4A9F-4BD6-8183-245C9C75B8A0 => m4v_file_data
* )
*/
public function getMedia($id)
{
// Make sure we're logged in and have a valid access token.
if (!$this->auth_token || !$this->username) {
return FALSE;
}
$timestamp = parent::timestamp();
$result = parent::post('/blob', array('id' => $id, 'timestamp' => $timestamp, 'username' => $this->username), array($this->auth_token, $timestamp));
if (parent::isMedia(substr($result, 0, 2))) {
return $result;
} else {
$result = parent::decryptECB($result);
if (parent::isMedia(substr($result, 0, 2))) {
return $result;
}
//When a snapchat video is sent with "text" or overlay
//the overlay is a transparent PNG file Zipped together
//with the M4V file.
//First two bytes are "PK" x50x4B; thus the previous media check
//will fail and would've returned a FALSE on an available media.
if (parent::isCompressed(substr($result, 0, 2))) {
//Uncompress
$result = parent::unCompress($result);
//Return Media and Overlay
return $result;
}
}
return FALSE;
}
