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Thread: Can't play vod URL affter hasing use Security token V2

  1. #1
    Join Date
    Jun 2015
    Posts
    3

    Exclamation Can't play vod URL affter hasing use Security token V2

    Sorry for my bad English.

    I using Wowza Stream Engine and I Enable Outgoing security with SecurityToken Version 2.
    My Application using C# on server to generate PLay URL

    I do Step by step in this article: http://www.wowza.com/forums/content....ine#parameters

    These is my Configuration:

    Server Root Url: http://192.168.1.107:1935
    VOD ApplicationName: vod
    Share Secret: aaaa
    Query Prefix: imv
    FilePath: sample.mp4
    Option: Include client IP address in hash generation Is On
    Client IP: 192.168.1.107


    And String for hash Generated: vod/sample.mp4?192.168.1.107&aaaa

    I Use SHA256 for Encryption.

    And this is may Result:
    PHP Code:
    http://192.168.1.107:1935/vod/sample.mp4/playlist.m3u8?imvhash=94a7ad9755e8de92cfc68c69afc48ae02f1142fa9f5cd8b1fed2f5792d6d0c41 
    I try to open this URL in VLC Player. But it not working for me.

    Any help, please.

  2. #2
    Join Date
    Jun 2015
    Posts
    3

    Default

    Any help?

  3. #3
    Join Date
    Jun 2012
    Posts
    723

    Default

    Hi,

    The calculated hash you are presenting here does not look like a URL-safe Base64 encoded string.
    You should also Base64 encode the hashed string and replace the '+' character with the '-' character and the '/' character with the '_' character.
    hash

    (Required) The hash generated at the client as a URL-safe Base64-encoded string. URL-safe Base64 encoding replaces the '+' character with the '-' character and the '/' character with the '_' character.

    Example: wowzatokenhash=VSNlS5S2Na5KxwwiVLXIcHwC90CF2lHdmCm9v_8Bh0o=
    In PHP you can use something similar to this:
    <?php
    
    $clientIP = null; // provide client IP optionally
    // $clientIP = $_SERVER['REMOTE_ADDR'];
    $host = "hostname.com"; // your ip/host
    $url= "http://".$host.":1935/";
    $stream = "live/myStream"; // your stream
    $start = time();
    $validity = 1000; // validity in seconds
    $end = time() + $validity;
    $secret = "00secret"; // your secret
    $tokenName = "wt";
    
    
    $params = array("{$tokenName}starttime=".$start, "{$tokenName}endtime=".$end, $secret);
    if(!is_null($clientIP)){
            $params[] = $clientIP;
    }
    sort($params);
    
    $string4Hashing = $stream."?";
    foreach($params as $entry){
            $string4Hashing .= $entry."&";
    }
    
    $string4Hashing = preg_replace("/(\&)$/","", $string4Hashing);
    
    $hash = hash('sha256', $string4Hashing, true); // generate the hash string
    
    echo $string4Hashing;
    echo "<br>";
    
    $base64Hash = strtr(base64_encode($hash), '+/', '-_'); // Base64 encode the hashed string
    
    
    $playbackURL = $url.$stream."/playlist.m3u8?".$tokenName."starttime=".$start.$tokenName."endtime=".$end.$tokenName."hash=".$base64Hash;
    
    echo $base64Hash;
    echo "<br>";
    echo $playbackURL;
    echo "<br>";
    
    ?>
    Zoran

  4. #4
    Join Date
    Jun 2015
    Posts
    3

    Default

    Quote Originally Posted by zoran_u View Post
    Hi,

    The calculated hash you are presenting here does not look like a URL-safe Base64 encoded string.
    You should also Base64 encode the hashed string and replace the '+' character with the '-' character and the '/' character with the '_' character.


    In PHP you can use something similar to this:
    <?php
    
    $clientIP = null; // provide client IP optionally
    // $clientIP = $_SERVER['REMOTE_ADDR'];
    $host = "hostname.com"; // your ip/host
    $url= "http://".$host.":1935/";
    $stream = "live/myStream"; // your stream
    $start = time();
    $validity = 1000; // validity in seconds
    $end = time() + $validity;
    $secret = "00secret"; // your secret
    $tokenName = "wt";
    
    
    $params = array("{$tokenName}starttime=".$start, "{$tokenName}endtime=".$end, $secret);
    if(!is_null($clientIP)){
            $params[] = $clientIP;
    }
    sort($params);
    
    $string4Hashing = $stream."?";
    foreach($params as $entry){
            $string4Hashing .= $entry."&";
    }
    
    $string4Hashing = preg_replace("/(\&)$/","", $string4Hashing);
    
    $hash = hash('sha256', $string4Hashing, true); // generate the hash string
    
    echo $string4Hashing;
    echo "<br>";
    
    $base64Hash = strtr(base64_encode($hash), '+/', '-_'); // Base64 encode the hashed string
    
    
    $playbackURL = $url.$stream."/playlist.m3u8?".$tokenName."starttime=".$start.$tokenName."endtime=".$end.$tokenName."hash=".$base64Hash;
    
    echo $base64Hash;
    echo "<br>";
    echo $playbackURL;
    echo "<br>";
    
    ?>
    Zoran
    Hi Zoran.
    Thanks for your help.
    And If I Place my Video In subfolder of Wowza Root Directory. is THe Url generated like above.

    FilePath: video_2015-06-20/sample.mp4

    Thanks.

  5. #5

    Default

    Hi,

    If wanted to access files in a sub-folder then be sure to use _definst_ when you construct your URL, for example

    [code]
    protocol://[wowza-address]:1935/[app-name]/_definst_/mp4:[path]/[stream-name]
    [/url]


    Paul

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