5.1 RTSP stream authentication failed using digest method

Answered

Sam Fang

September 08, 2023 06:40

Hi Support,

I am trying to pull the RTSP stream from our NX server 5.1 using VLC player from C#. I have enabled the digest authentication for the viewing user.

at first, when using basic authentication (RTSP://user:pwd@....) it works fine for certain amount of time, then the authentication fails. if retype the same password for the user in NX, it works again for sometime. I also noticed the "rejection" happens more quick when pulling multiple RTSP streams.

then I tried to use the digest authentication, tried either the way described in the API doc for V1, 

digest = md5_hex(to_lower(user_name) + ":" + realm + ":" + password)

simplified_ha2 = md5_hex(digest + ":" + nonce + ":" + "GET" + ":")

auth = base64(to_lower(user_name) + ":" + nonce + ":" + simplified_ha2)

 

Or the way suggested in forum:

digest = md5_hex(to_lower(user_name) + ":" + realm + ":" + password)

simplified_ha2 = md5_hex(digest + ":" + nonce + ":" + md5_hex("GET:"))

auth = base64(to_lower(user_name) + ":" + nonce + ":" + simplified_ha2)

 

it always failed to authenticate, and seems the nonce from the response always incorrect for last four letters. 

I did make sure the login is lowcase.

 

is anything else should I try? Thanks

 

below is a sample, the nonce I used to calculated is jrjY7zHFHefhRx11fF/bLwfsykHuQ0=hzcfdc

response is

jrjY7zHFHefhRx11fF/bLwfsykHuQ0=hzxnzk

 

Sending request: OPTIONS rtsp://192.168.10.21:7001/5dc2e101-6f09-9f44-0fc1-90df4264da87?auth=ZHN4Ompyalk3ekhGSGVmaFJ4MTFmRi9iTHdmc3lrSHVRMD1oemNmZGM6NWFkODBlZGMyMmMxYzVkMmQwY2ZlN2RhOWJiMTI0ZjY= RTSP/1.0
CSeq: 2
User-Agent: LibVLC/3.0.18 (LIVE555 Streaming Media v2016.11.28)

Received 359 new bytes of response data.
Received a complete OPTIONS response:
RTSP/1.0 401 Unauthorized
Access-Control-Allow-Origin: *
Connection: Keep-Alive
Content-Length: 0
CSeq: 2
Date: Fri, 08 Sep 2023 06:32:00 GMT
Keep-Alive: timeout=5
WWW-Authenticate: Digest realm="VMS", nonce="jrjY7zHFHefhRx11fF/bLwfsykHuQ0=hzxnzk", algorithm=MD5
X-Auth-Result: Auth_Forbidden
X-server-guid: {a19aac25-59f5-3948-0a0f-eef8702a2eff}

 

 

 

0

• 

  Andrey Terentyev

  • Network Optix team

  September 08, 2023 10:43

  Hello,

  I am trying to pull the RTSP stream from our NX server 5.1 using VLC player from C#.

  I don't understand quite well what are you trying to do, but have you tried to open a stream directly in VLC?

  Media->Open Network Stream...

  Please try this code example

  https://github.com/networkoptix/nx_open_integrations/blob/master/python/examples/authentication/url_digest.py

  Does it work with your creads and you server?

  0
• 

  Sam Fang

  September 08, 2023 13:33

  Hi Andrey,  I have figured out my issue, the method for RTSP is not GET. Thanks for your help.

  0

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