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# Using TREZOR as a hardware SSH agent
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[](https://travis-ci.org/romanz/trezor-agent)
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[](https://pypi.python.org/pypi/trezor_agent/)
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[](https://pypi.python.org/pypi/trezor_agent/)
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[](https://pypi.python.org/pypi/trezor_agent/)
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[](https://pypi.python.org/pypi/trezor_agent/)
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[](https://pypi.python.org/pypi/trezor_agent/)
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See SatoshiLabs' blog post about this feature:
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https://medium.com/@satoshilabs/trezor-firmware-1-3-4-enables-ssh-login-86a622d7e609
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## Screencast demo usage
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[](https://asciinema.org/a/22959)
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## Installation
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First, make sure that the latest `trezorlib` Python package
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is installed correctly (at least v0.6.6):
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$ pip install Cython trezor
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Then, install the latest `trezor_agent` package:
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$ pip install trezor_agent
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Finally, verify that you are running the latest TREZOR firmware version (at least v1.3.4):
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$ trezorctl get_features
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vendor: "bitcointrezor.com"
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major_version: 1
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minor_version: 3
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patch_version: 4
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...
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## Public key generation
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Run:
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/tmp $ trezor-agent ssh.hostname.com -v > hostname.pub
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2015-09-02 15:03:18,929 INFO getting "ssh://ssh.hostname.com" public key from Trezor...
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2015-09-02 15:03:23,342 INFO disconnected from Trezor
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/tmp $ cat hostname.pub
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ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBGSevcDwmT+QaZPUEWUUjTeZRBICChxMKuJ7dRpBSF8+qt+8S1GBK5Zj8Xicc8SHG/SE/EXKUL2UU3kcUzE7ADQ= ssh://ssh.hostname.com
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Append `hostname.pub` contents to `~/.ssh/authorized_keys`
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configuration file at `ssh.hostname.com`, so the remote server
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would allow you to login using the corresponding private key signature.
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## Usage
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Run:
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/tmp $ trezor-agent ssh.hostname.com -v -c
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2015-09-02 15:09:39,782 INFO getting "ssh://ssh.hostname.com" public key from Trezor...
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2015-09-02 15:09:44,430 INFO please confirm user "roman" login to "ssh://ssh.hostname.com" using Trezor...
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2015-09-02 15:09:46,152 INFO signature status: OK
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Linux lmde 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u3 (2015-08-04) x86_64
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The programs included with the Debian GNU/Linux system are free software;
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the exact distribution terms for each program are described in the
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individual files in /usr/share/doc/*/copyright.
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Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
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permitted by applicable law.
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Last login: Tue Sep 1 15:57:05 2015 from localhost
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~ $
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Make sure to confirm SSH signature on the Trezor device when requested.
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