Digest challenge not supported :: Support Forum

Vepavani
Joined:: 2022-07-19
Posts:: 1
Location:: Brazil

Digest challenge not supported

2022-07-19 19:04

Hello
I'm trying to connect by WebDAV protocol in new version 5.21.1, but it's occuring an error.
When I used to connect in 5.19.6 there wasn't any problem

Below a part of log

5.21.1

. 2022-07-19 14:50:43.506 auth: Post-send (#0), code is 401 (want 401), WWW-Authenticate is Digest realm="xxxxxx", nonce="62d6eef35510d"
. 2022-07-19 14:50:43.506 auth: Got challenge (code 401).
. 2022-07-19 14:50:43.506 auth: Got 'Digest' challenge.
. 2022-07-19 14:50:43.506 auth: Trying Digest challenge...
. 2022-07-19 14:50:43.506 auth: No challenges accepted.
. 2022-07-19 14:50:43.506 Request ends, status 401 class 4xx, error line:
. 2022-07-19 14:50:43.506 Could not authenticate to server: legacy Digest challenge not supported
. 2022-07-19 14:50:43.506 Request ends.
. 2022-07-19 14:50:43.506 sess: Destroying session.
. 2022-07-19 14:50:43.506 sess: Closing connection.
. 2022-07-19 14:50:43.506 ssl: Shutdown state: not sent | not received.
. 2022-07-19 14:50:43.506 ssl: Sending closure.
. 2022-07-19 14:50:43.506 sess: Connection closed.
* 2022-07-19 14:50:43.527 (EFatal) Autenticação falhou.
* 2022-07-19 14:50:43.527 Could not authenticate to server: legacy Digest challenge not supported
* 2022-07-19 14:50:43.527 Conexão falhou.

5.19.6

. 2022-07-19 10:21:14.805 ah_post_send (#0), code is 401 (want 401), WWW-Authenticate is Digest realm="xxxxxx", nonce="62d6afca67a53"
. 2022-07-19 10:21:14.805 auth: Got challenge (code 401).
. 2022-07-19 10:21:14.805 auth: Got 'Digest' challenge.
. 2022-07-19 10:21:14.805 auth: Trying Digest challenge...
. 2022-07-19 10:21:14.805 Password prompt
. 2022-07-19 10:21:17.184 auth: H(A1) is [92e5ff06c69f37197db38f508fcddd0a]
. 2022-07-19 10:21:17.184 auth: Accepting digest challenge.
. 2022-07-19 10:21:17.184 auth: Accepted Digest challenge.
. 2022-07-19 10:21:17.184 auth: Sending 'Digest' response.
. 2022-07-19 10:21:17.184 auth: H(A2): 45209fdfa2194d3a36f665fac6935be6
. 2022-07-19 10:21:17.184 Sending request headers:
. 2022-07-19 10:21:17.184 OPTIONS /company/personal/user/2019/disk/path/ HTTP/1.1
. 2022-07-19 10:21:17.184 User-Agent: WinSCP/5.19.6 neon/0.31.2
. 2022-07-19 10:21:17.184 Keep-Alive: 
. 2022-07-19 10:21:17.184 Connection: TE, Keep-Alive
. 2022-07-19 10:21:17.184 TE: trailers
. 2022-07-19 10:21:17.184 Host: xxxxxxxxx
. 2022-07-19 10:21:17.184 Authorization:

image (1).png (23.27 KB)

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 41,518
Location:: Prague, Czechia

Re: Digest challenge not supported

2022-07-24

Thanks for your report.
WinSCP 5.21 indeed does not support legacy RFC 2069 Digest anymore.
What server are you connecting to that still uses it?

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benjamint
Joined:: 2022-09-01
Posts:: 1

Same problem

2022-09-01 17:44

Hey,
I have the same problem. I use WinSCP to connect to a bitrix24.de drive. Is there any solution or workaround?

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 41,518
Location:: Prague, Czechia

Re: Same problem

2022-09-05

That Digest challenge has been obsoleted over 20 years ago:
Disable 2069-style weak Digest auth by default · Issue #23 · notroj/neon
Please ask the server administrator to upgrade it.
Anyway, I've added this issue to the tracker:
Issue 2109 – Restore support for legacy version of the Digest algorithm specified in RFC 2069
If there's sufficient demand, I may try to implement a workaround.

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david.edson Donor
Joined:: 2023-03-09
Posts:: 2
Location:: Sydney Australia

I am having the same issue, trying to connect to WebDAV server on iPad with Textastic application

2023-03-09 23:50

Can you please tell me the magic way to 'allow' connections using the advanced RAW settings in WinSCP? I am prepared to accept the security bypass between my owned two nodes.

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martin◆ Site Admin

Re: I am having the same issue, trying to connect to WebDAV server on iPad with Textastic application

2023-03-11

@david.edson: Do you refer to the Bug 2109? It hasn't been implemented yet. Vote for it, if you want it to happen.

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david.edson Donor

I vote for a work around for this issue.

2023-10-10 23:19

Please offer a way to 'accept' a known server that I trust and will accept the risk of connection please.

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Digest challenge not supported