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The support for DSA keys was removed[1] in Paramiko 4.0. [1] https://www.paramiko.org/changelog.html#4.0.0
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@pahaz this fix is reasonably ugrent as all new installs of sshtunnel stop working out of the box |
pahaz
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Aug 27, 2025
JiaWeiXie
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This commit removes support for the deprecated DSA (DSS) key algorithm, which was removed in paramiko 3.0. DSS has been obsolete and insecure for over a decade and was removed from OpenSSH. Changes made: - Updated paramiko dependency from >=2.7.2 to >=3.0.0 in setup.py - Removed paramiko.DSSKey references from sshtunnel.py: * Removed 'dsa': paramiko.DSSKey from paramiko_key_types dict * Removed paramiko.DSSKey from key_types tuple - Updated documentation to reflect RSA/ECDSA support only: * Updated docstrings in sshtunnel.py * Updated CLI help text * Updated README.rst * Updated CLAUDE.md to mention Ed25519 support - Removed SSH_DSS test constant from tests/test_forwarder.py - Removed 'ssh-dss' from FINGERPRINTS test dict - Updated all test assertions to use SSH_RSA instead of SSH_DSS All existing tests pass with paramiko 4.0.0. Fixes: pahaz#299 (module 'paramiko' has no attribute 'DSSKey') Based on community proposals: pahaz#300, pahaz#301, pahaz#304 Tested with: - paramiko 4.0.0 (latest) - All argument parsing tests pass - All key-related tests pass
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paramiko 4.0 removed DSSKey, so referencing it unconditionally raised AttributeError in get_keys() and read_private_key_file(). Use DSSKey only when paramiko provides it, as is already done for Ed25519Key, and drop the paramiko<4 upper bound. Based on #300 and #301. Co-authored-by: lglines <207626117+lglines@users.noreply.github.com> Co-authored-by: mweinelt <131599+mweinelt@users.noreply.github.com>
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The support for DSA keys was removed[1] in Paramiko 4.0.
[1] https://www.paramiko.org/changelog.html#4.0.0
Alternative to #300 that also takes care of tests and the documentation.