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February 27, 2024 08:37
Were removed in 005f75a.
Paramiko 2.9.0 added support for SHA-2 variants of RSA key verification algorithms. See: https://www.paramiko.org/changelog.html#2.9.0 This breaks connections to Debian squeeze hosts which don't support these nor server-sig-algs to help Paramilo make the right choice. Example of a failed connection: ``` DEBUG:paramiko.transport:Finalizing pubkey algorithm for key of type 'ssh-rsa' DEBUG:paramiko.transport:Our pubkey algorithm list: ['rsa-sha2-512', 'rsa-sha2-256', 'ssh-rsa'] DEBUG:paramiko.transport:Server did not send a server-sig-algs list; defaulting to our first preferred algo ('rsa-sha2-512') DEBUG:paramiko.transport:NOTE: you may use the 'disabled_algorithms' SSHClient/Transport init kwarg to disable that or other algorithms if your server does not support them! INFO:paramiko.transport:Authentication (publickey) failed. ``` This can be fixed by setting the following in the job configuration: ``` ssh_disabledalgs: pubkeys: - rsa-sha2-512 - rsa-sha2-256 ``` The connection then succeeds: ``` DEBUG:paramiko.transport:Finalizing pubkey algorithm for key of type 'ssh-rsa' DEBUG:paramiko.transport:Our pubkey algorithm list: ['ssh-rsa'] DEBUG:paramiko.transport:Server did not send a server-sig-algs list; defaulting to our first preferred algo ('ssh-rsa') DEBUG:paramiko.transport:NOTE: you may use the 'disabled_algorithms' SSHClient/Transport init kwarg to disable that or other algorithms if your server does not support them! INFO:paramiko.transport:Authentication (publickey) successful! ```
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Running the tests in a Debian bookworm environment revealed some issues.
Fixed by putting a space between
ifand(.Fixed by using multiple lines for the comment.
Fixed by restoring the pytest-cov options in
setup.cfg.Fixed by adding
sshdisabledalgsoption to jobs which is passed toparamiko.SSHClient.connect()as the itsdisabled_algorithmsargument.See also: https://www.paramiko.org/changelog.html#2.9.0