Need SSH Core PuTTY 0.76 (WinSCP 6; ASAP) :: Support Forum

NOYB
Joined:: 2010-05-21
Posts:: 4

Need SSH Core PuTTY 0.76 (WinSCP 6; ASAP)

2021-11-14 08:56

When will WinSCP 6.0 be released?
SSH core PuTTY 0.76 needed for firewall access (OPNsense 21.7.5).

PuTTY 0.76 works.

WinSCP 5.19.4 does not.
"Server refused our key."

Thanks

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 41,441
Location:: Prague, Czechia

Re: Need SSH Core PuTTY 0.76 (WinSCP 6; ASAP)

2021-11-15

We do not have any plans for WinSCP 6 release yet, sorry.

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NOYB
Joined:: 2010-05-21
Posts:: 4

2021-11-15 22:55

That's disappointing.

Is there anyway to get 5.19.4 to use the installed PuTTY 0.76?

Would be nice if WinSCP had provision for using an installed PuTTY version, like Git Extensions does.
By default it uses an included version: C:\Program Files (x86)\GitExtensions\PuTTY\...
But it can be easily changed in the SSH settings to use a different installed version.

Git Extensions - SSH Settings - PuTTY.jpg (224.87 KB)

Description: Git Extensions - SSH Settings - PuTTY

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 41,441
Location:: Prague, Czechia

2021-11-19

NOYB wrote:

Would be nice if WinSCP had provision for using an installed PuTTY version, like Git Extensions does.

That's not possible at all. WinSCP's use of SSH is way more complex than the PuTTY binary interface allows. It's incomparable to the trivial use of SSH in Git.

Anyway, we have decided to release WinSCP 5.20 with PuTTY 0.76 within few weeks.

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NOYB

2021-11-19 13:24

Figured that would likely be the case re: Git SSH vs. WinSCP. But posed the question just in case.
Anyway. 5.20 with PuTTY 0.76 will be welcome. Looking forward to it. Thanks.

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kitchin
Joined:: 2015-02-13
Posts:: 11
Location:: Virginia

2021-11-22 13:04

WinSCP stopped working with public key connecting to one of my servers, some time in the last four days. PuTTY 0.76 and FileZilla do work. I generated a new key using the PuTTYgen defaults just to be sure. It also failed without Pageant. Thank you.

. 2021-11-22 06:49:55.189 Looking up host "..." for SSH connection
. 2021-11-22 06:49:55.202 Connecting to ... port 22
. 2021-11-22 06:49:55.262 We claim version: SSH-2.0-WinSCP_release_5.19.4
. 2021-11-22 06:49:55.302 Remote version: SSH-2.0-OpenSSH_8.8
. 2021-11-22 06:49:55.302 Using SSH protocol version 2
. 2021-11-22 06:49:55.303 Have a known host key of type rsa2
. 2021-11-22 06:49:55.354 Doing ECDH key exchange with curve Curve25519 and hash SHA-256
. 2021-11-22 06:49:55.509 Server also has ssh-ed25519/ecdsa-sha2-nistp256 host keys, but we don't know any of them
. 2021-11-22 06:49:55.509 Host key fingerprint is:
. 2021-11-22 06:49:55.509 ssh-rsa 2048 ...
. 2021-11-22 06:49:55.591 Host key matches cached key
. 2021-11-22 06:49:55.593 Initialised AES-256 SDCTR (AES-NI accelerated) [aes256-ctr] outbound encryption
. 2021-11-22 06:49:55.593 Initialised HMAC-SHA-256 outbound MAC algorithm
. 2021-11-22 06:49:55.593 Initialised AES-256 SDCTR (AES-NI accelerated) [aes256-ctr] inbound encryption
. 2021-11-22 06:49:55.593 Initialised HMAC-SHA-256 inbound MAC algorithm
. 2021-11-22 06:49:55.634 Reading key file "..."
. 2021-11-22 06:49:55.636 Pageant is running. Requesting keys.
. 2021-11-22 06:49:55.640 Pageant has 2 SSH-2 keys
. 2021-11-22 06:49:55.641 Pageant key #1 matches configured key file
! 2021-11-22 06:49:55.641 Using username "...".
. 2021-11-22 06:49:55.704 Server offered these authentication methods: publickey,password,keyboard-interactive
. 2021-11-22 06:49:55.704 Trying Pageant key #1
. 2021-11-22 06:49:55.754 Server refused our key

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Guest

2021-11-23 09:38

martin wrote:

Anyway, we have decided to release WinSCP 5.20 with PuTTY 0.76 within few weeks.

Whoa...a few weeks? That's really a shame as this renders WinSCP useless for me for that period. :(

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martin◆ Site Admin

2021-11-23

@kitchin: That's probably the issue that this topic is about. Please wait for WinSCP 5.20. I can send you a development version for testing once it is ready, if you are interested. Same for @NOYB.

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martin◆ Site Admin

2021-11-23

@Guest: You can re-configure your server, not to be that strict meanwhile.
See https://winscp.net/tracker/1952

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Guest

2021-11-23 10:32

@martin: Oh, so that's the culprit. Ok, but what will 6.0 (or 5.20) change that will mitigate this issue?

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martin◆ Site Admin

2021-11-23

@Guest: It will support SHA2. As the tracker says.

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kitchin

2021-11-28 05:12

martin wrote:

@kitchin: That's probably the issue that this topic is about. Please wait for WinSCP 5.20. I can send you a development version for testing once it is ready, if you are interested. Same for @NOYB.

Thank you, I will be glad to test it.

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