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https://issues.apache.org/jira/browse/GUACAMOLE-1652?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Jumper updated GUACAMOLE-1652:
-----------------------------------
Fix Version/s: 1.6.0
> SFTP+VNC broken when built with OpenSSL versions >= 1.1.0
> ---------------------------------------------------------
>
> Key: GUACAMOLE-1652
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-1652
> Project: Guacamole
> Issue Type: Bug
> Components: guacamole-server
> Reporter: James Muehlner
> Priority: Major
> Fix For: 1.6.0
>
>
> VNC connections with SFTP file transfer enabled are failing with the
> following error:
> `ERROR: Public key authentication failed: Callback returned error`.
> This seems to only be happening with OpenSSL versions >= 1.1.0. Strangely,
> SSH and RDP connections to the same machine, with the same SSH parameters
> _do_ still work.
>
> Per [https://www.openssl.org/docs/man1.1.1/man3/OPENSSL_init_ssl.html]
> {quote}As of version 1.1.0 OpenSSL will automatically allocate all resources
> that it needs so no explicit initialisation is required. Similarly it will
> also automatically deinitialise as required.{quote}
> It looks like removing the calls to the OpenSSL library initialization in
> common-ssh fixes the problem for me. Perhaps some library we're using for VNC
> is also initializing OpenSSL.
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