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Power Platform Community / Forums / Power Automate / HMAC Algorithm not fou...
Power Automate
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HMAC Algorithm not found issue with SFTP from FTP action

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Posted on by 6

I am running into an issue with the SFTP Connection. I get the following error:

 

Server HMAC algorithm not found: Microsoft.PowerPlatform.PowerAutomate.Desktop.Actions.SDK.ActionException: Can't login to <Host Name>. ---> Renci.SshNet.Common.SshConnectionException: Server HMAC algorithm not found
at Renci.SshNet.Session.WaitOnHandle(WaitHandle waitHandle, TimeSpan timeout)
at Renci.SshNet.Session.Connect()
at Renci.SshNet.BaseClient.CreateAndConnectSession()
at Renci.SshNet.BaseClient.Connect()
at Microsoft.Flow.RPA.Desktop.Modules.FTP.Actions.OpenSecureFtpConnectionAction.InitializeSftpConnection()
at Microsoft.Flow.RPA.Desktop.Modules.FTP.Actions.OpenSecureFtpConnectionAction.Execute(ActionContext context)
--- End of inner exception stack trace ---
at Microsoft.Flow.RPA.Desktop.Modules.FTP.Actions.OpenSecureFtpConnectionAction.Execute(ActionContext context)
at Microsoft.Flow.RPA.Desktop.Robin.Engine.Execution.ActionRunner.Run(IActionStatement statement, Dictionary`2 inputArguments, Dictionary`2 outputArguments)

 

I'm not sure what the problem is. We have an OPENSSH formatted private key and are pointing to the appropriate file path. The method is SFTP. 

 

Has anyone else run into this type of issue from the desktop?

 

Thanks

-Patrick

  • Kurt1234 Profile Picture
    8 on at

    Having the same issue. Looks like the background service the PA uses for (s)FTP needs to be updated. 

  • Suggested answer
    CU21022355-0 Profile Picture
    2 on at
    Power automate is using a 2020 version of renci ssh.net it needs to be updated to include the current version of the Library 

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