SessionOptions passphrase :: Support Forum

kulicny
Joined:: 2024-08-21
Posts:: 6
Location:: New Hampshire, US

SessionOptions passphrase

2024-08-21 15:47

I am scripting in PowerShell. I send the following commands using SessionOptions and keep getting the results below from the log file. I've successfully connected with the WinSCP client app using the PPK and the passphrase. I just can't get it to work via the PowerShell script. I'm not sure what I'm missing or should be doing differently.

$sessionOptions = New-Object WinSCP.SessionOptions -Property @{
        Protocol = [WinSCP.Protocol]::Sftp
        HostName = "<my host name>"
        UserName = "<myusername>"
        PrivateKeyPassphrase = "<mypassphrase>"
        SshPrivateKeyPath = "<pathformyPPK>"
        SshHostKeyFingerprint = "<ssh rsa fingerprint>"
}

This is the from the log file:

Reading key file "<pathformyPPK>"
Using username "<myusername>".
Script: Using username "<myusername>".
Server offered these authentication methods: publickey
Offered public key
Offer of public key accepted
Authenticating with public key "<mypublickey>"
Script: Authenticating with public key "<mypublickey>".
Prompt (passphrase, "SSH key passphrase", <no instructions>, "Passphrase for key "<mypublickey>": ")
Using configured passphrase.
Wrong passphrase
Script: Wrong passphrase.

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kulicny

update

2024-08-21 19:36

It appears to have something to do with Pageant. I did a bit more research, and after adding the private key and passphrase to Pageant, it executes as expected. I wouldn't have expected to have to have Pageant running and the ppk in there to make this to work. Plus, I still had to supply the passphrase in the script, so I'm not sure this is the "correct" solution. But it did connect and put the file.

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 41,210
Location:: Prague, Czechia

Re: SessionOptions passphrase

2024-08-22

Please post complete log of successful session from GUI and failing session from PowerShell.

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kulicny
Joined:: 2024-08-21
Posts:: 6
Location:: New Hampshire, US

logs

2024-08-22 16:39

Here are the requested logs. Let me know if you need anything else.

IROLftp.log (7.23 KB, Private file)

Description: Script log

GUI.log (7.77 KB, Private file)

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 41,210
Location:: Prague, Czechia

Re: logs

2024-08-26

I believe you are either using a different key or a different passphrase. It's hard to imagine any other explanation.

Are there any special characters in your passphrase? Did you test it with some very trivial one ("abc")?

Enable password logging in both GUI and .NET, to check if WinSCP really gets the passphrase that it should.

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kulicny

RE:

2024-08-26 12:36

Well, you were right. There was a special character in the passphrase. I didn't realize that it would interpret the character as special while setting SessionOptions. Enclosing the PrivateKeyPassphrase in single quotes vs double quotes solved it and it passes the entire string. Thanks for the suggestion and apologies for not having considered that sooner.

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